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2017

19602238Decoding method and apparatus
29577858RF chirp receiver synchronization
39577708Systems and methods for a twisted pair transceiver with correlation detection
49571322Transmitter, receiver and controlling method thereof
59556727Method and apparatus for acoustic downhole telemetry and power delivery system using transverse or torsional waves
69548840Modulation and equalization in an orthonormal time-frequency shifting communications system
79544442Lingering cancellation for data encoded audio signals
89537680Inducing response signatures in a communication network

2016

99515815Transpositional modulation systems, methods and devices
109514088Method and device for processing serial binary input by comparing binary digits at even and odd locations of the input
119490964Symbol transition clocking clock and data recovery to suppress excess clock caused by symbol glitch during stable symbol period
129479381Method for transmitting at least one multi-carrier signal consisting of OFDM-OQAM symbols
139465097Systems and methods for providing ADS-B mode control through data overlay
149461775Method, apparatus and system for transmitting information bits
159461752Methods and arrangements for generating a waveform for frequency shift keying communications
169455863Separating and extracting modulated signals
179450793Device and method of sequence detection for frequency-shift keying
189437070Solar lighting with pay-as-you go technology
199426813Interference cancellation receiving method and interference cancellation receiving terminal
209426015Apparatus and method for symbol mapping in wireless communication system using multi tone frequency quadrature amplitude modulation
219426014Separating and extracting modulated signals
229423443System and method of detecting and locating intermittent and other faults
239401833Method and apparatus for transmitting/receiving signal in wireless communication system
249401702Binary frequency shift keying with data modulated in digital domain and carrier generated from intermediate frequency
259397732Motes for environment mapping
269385893Modular low power serializer-deserializer
279385816Methods and arrangements for frequency shift communications by undersampling
289385766Digital signal processing device, receiving device, and signal transmitting and receiving system
299379925Transpositional modulation systems and methods
309374245Observation of the true channel from band-limited frequency domain observations
319363041Wireless power transfer in-band communication system
329357548Apparatus and method for changing frequency deviation
339356653Method and arrangement in a DSL vectoring system
349338042Separating and extracting modulated signals
359319098Encrypting communications
369316722Systems and methods for providing ATC overlay protocols
379300517Method and apparatus for transmitting/receiving signal in communication system
389276787Transmission of signaling messages using beacon signals
399253002Non-contact power supply transmitter system and receiving device
409246669Apparatus and method for modular signal acquisition and detection
419242106Telemetry system for use with microstimulator
429240847Method for suppressing interferences in a sampling process as well as a device for carrying out the method
439237449Autocorrelation-based spectrum sensing for FM signals

2015

449197468Communication methods between a tanker aircraft and a receiver aircraft in an in-flight refueling operation
459178732Beacon coding in wireless communications systems
469162071Method for controlling telemetry in an implantable medical device based on power source capacity
479148316Decision feedback equalizer
489118527Data during analog audio
499112592System and method for chirp-based transmission
509106485System and method for FSK demodulation
519099886Apparatus for power wireless transfer between two devices and simultaneous data transfer
529094107Orthogonal frequency chirp multiple accessing systems and methods
539079041Systems and methods for communicating with an implantable stimulator
549049084Utilizing an offset QPSK signal to transmit two digital symbols
559020063Automatic Frequency Shift Keying (FSK) tuning circuit for a hearing aid and method
569001918Communication method and apparatus in a wireless communication system supporting multiple OFDM parameters sets
578971394Inducing response signatures in a communication network
588964875Adaptive IQ imbalance estimation
598953669Decision feedback equalizer
608948293Downlink multiple input multiple output enhancements for single-cell with remote radio heads
618948292Phase angle mapping for phase modulation
628937996Receiver with ICI noise estimation

2014

638923429Overlay modulation of COFDM using phase and amplitude offset carriers
648897385Doppler estimator for OFDM systems
658891662Reference symbol structure for DFT spread OFDM system
668842766Apparatus and method for reducing interference signals in an integrated circuit using multiphase clocks
678837625Method of transmitting control information in wireless communication system
688831129Method, apparatus and system for transmitting information bits
698817907Systems and methods for signaling for vectoring of DSL systems
708817646Method and apparatus for managing system information in wireless communication system supporting multi-carriers
718787514Apparatus and method for generating pseudo noise code
728787487Distortion compensation device and distortion compensating method
738774306Apparatus and method for transmitting and receiving
748743944Decision feedback equalizing method and equalizer
758743862High speed overlay mode for burst data and real time streaming (audio) applications
768634491Method and apparatus for reducing the contribution of noise to digitally sampled signals
778625703Method of transmitting control information in wireless communication system

2013

788619896Method, apparatus and system for transmitting information bits
798571121Method for SER approximation for OSTBC in distributed wire communication systems
808565336Data transmission apparatus and method, and data reconstitution apparatus and method
818537928Channel estimation methods and systems based on power measurement at receivers
828514964Control system methods and apparatus for inductive communication across an isolation barrier
838504015Short-range wireless relay method and system
848503568Differential encoding for multiplexed data streams
858483267Non-linear analog decision feedback equalizer
868442146Apparatus and methods for reducing channel estimation noise in a wireless transceiver
878416846Systems, circuits and methods for adapting taps of a decision feedback equalizer in a receiver
888412259Outer loop transmit power control in wireless communication systems
898391420Low frequency communication signal state detection
908385457Methods and systems to compensate IQ imbalance in wideband zero-if tuners
918385250Digital broadcasting system and data processing method in the digital broadcasting system
928379754Method and device for predicting a figure of merit from a distribution
938369442Communicating a signal according to ASK modulation and PSK modulation
948358717Device and method for binary phase shift key demodulator using phase shifter
958358685Iterative detection and decoding in multiple antenna communication systems
968355460Radio transmitter system and method

2012

978331297Method and system for generating antenna selection signals in wireless networks
988306145Overlay modulation of COFDM using phase and amplitude offset carriers
998290030Micro-controller with FSK modem
1008275073Methods and systems to discriminate between PSK and FSK signals
1018265681Outer loop transmit power control in wireless communication systems
1028265193Method and system for communicating data over a wireless communication system voice channel utilizing frame gaps
1038229019MIMO precoding enabling spatial multiplexing, power allocation and adaptive modulation and coding
1048213494Sign-based general zero-forcing adaptive equalizer control
1058208577Control system methods and apparatus for inductive communication across an isolation barrier
1068194779Method for data communication via a voice channel of a wireless communication network
1078194526Method for data communication via a voice channel of a wireless communication network
1088189709Frequency domain equalization method for continuous phase modulated signals
1098185381Unified filter bank for performing signal conversions
1108144802Digital data encoding and decoding method and system
1118135086Cable reduction
1128121214Local oscillator with non-harmonic ratio between oscillator and RF frequencies using XOR operation
1138116401Method and system for digital spur cancellation
1148098757Method and apparatus for windowing orthogonal frequency division multiplexed signals
1158094727DTV transmitter and method of coding data in DTV transmitter
1168093942Frequency translation module data clamp

2011

1178077821Optimized timing recovery device and method using linear predictor
1188050350Receiver I-Q balance calibration
1198036334Delay lock loop phase glitch error filter
1207986728Equalizer with combined CCK encoding-decoding in feedback filtering of decision feedback equalizer
1217940853Method and device for calculating zero-croccing reference sequences for signal detection of angle-modulated signals based on zero crossings of the received signal
1227933354Encoding and decoding architecture and method for pipelining encoded data or pipelining with a look-ahead strategy
1237915997System and method for remote activation with interleaved modulation protocol
1247876852Modulator device for generating an optical transfer signal modulated by binary signal
1257864900Communication system for sending and receiving digital data

2010

1267835460Apparatus and methods for reducing channel estimation noise in a wireless transceiver
1277817081Radar apparatus, method for controlling the same, and vehicle including the same
1287804376Continuous phase modulation processing for wireless networks
1297778344System and method for combining a plurality of signals of various phases having a wide frequency range
1307751497Method to minimize compatibility error in hierarchical modulation using variable phase
1317697627FM transmitter for portable electronic device having rotary encoder
1327693229Transmission of signals in cellular systems and in mobile networks
1337688911Method and apparatus for synchronizing alternating quadratures differential binary phase shift keying modulation and demodulation arrangements
1347653144Gaussian FSK modulation with more than two modulation states
1357653141Multi-band OFDM UWB communication systems having improved frequency diversity
1367649957Non-overlapping multi-stage clock generator system
1377649956Modulation and demodulation system, modulator, demodulator and phase modulation method and phase demodulation method used therefor
1387646825Impulse generating device, communication device, and a computer-readable recording medium recording an impulse control program thereon
1397643571Wireless communication system and method

2009

1407639444Real-time channel adaptation
1417636386Method of continuously calibrating the gain for a multi-path angle modulator
1427627053Apparatus and method for driving a pulse width modulation reference signal
1437532678Method for transmitting data by multi-carrier modulation
1447529314Carrier phase detector
1457515645Method for dividing the bit rate of QPSK signals into two or several subchannels
1467492831Method for generating multiplier coefficients for a mixer
1477477679Spread spectrum demodulator employing frequency detection

2008

1487460593Signal processing device capable of enhancing correctness of feedback signals
1497457370Frequency staggered frequency shift keying modulation
1507447277Ofdm demodulation device
1517447168System and method for auto-negotiation in a data communication device
1527436263Apparatus and method for presenting a modulated output signal at an output locus
1537430247Carrier frequency detection for N-ary phase modulated signal
1547412006Method and apparatus for RF carrier feedthrough suppression
1557394862Multi-mode wireless polar transmitter architecture
1567382827Computation of decision feedback equalizer coefficients with constrained feedback tap energy
1577372914Control system methods and apparatus for inductive communication across an isolation barrier
1587369623Apparatuses to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards
1597359449Data communication for wired and wireless communication
1607356089Phase offset spatial multiplexing
1617352795System and method for communicating data using constant amplitude waveform with hybrid orthogonal and MSK or GMSK modulation
1627349488Frequency shift keying signaling for integrated circuits
1637319722Circuit for the decoding of biphase signals

2007

1647305042T1 radio having coding gain adjustable for number of channels
1657298789Polarization modulation with amplitude differential
1667298788Wireless communication system and method
1677292646Apparatus and method for synchronous demodulation
1687292645Binary transmitter and method of transmitting data in binary format
1697289573Modulator/transmitter apparatus and method
1707283594Impedance modulation signaling
1717269229Reduced memory architecture for edge modulator
1727269228Non-coherent frequency shift keying transmitter using a digital interpolation synthesizer
1737236543Method and apparatus of 8PSK modulation
1747210057Low-speed DLL employing a digital phase interpolator based upon a high-speed clock
1757190736Technique to simultaneously distribute clock signals and data on integrated circuits, interposers, and circuit boards
1767180964Constellation manipulation for frequency/phase error correction
1777177362Apparatus for adaptive resolution of phase ambiguity value

2006

1787106804Method of and system for modulating and demodulating a communication signal using differential quadrature phase shift keying (DQPSK)
1797095794Methods and apparatus for a spread spectrum modulated backscatter electronic shelf label system
1807092438Multilevel decision feedback equalizer
1817079587Signal transmitter having voltage booster circuit and method of operating the same
1827072420Communications systems
1837072414Gaussian minimum shift keying (GMSK) precoding communication method
1847068725Bit detection threshold in a TDMA burst communication system
1857057543Low power method and interface for generating analog waveforms
1867039120Device and method for the dynamic allocation of frequencies for multicarrier modulation systems
1877016429Training sequences for peak to average power constrained modulation formats
1887003047Tri-state integer cycle modulation
1896985538Digital radio communication system and method

2005

1906950478Transmitter and method having a low sampling frequency for digital to analog conversion
1916934524Fine-stage automatic frequency compensation in post-detection short-range wireless applications
1926925130Method and system for a reduced emissions direct drive transmitter for unshielded twisted pair (UTP) applications
1936891905Apparatus and method for FSK demodulation with integrated time and frequency tracking
1946885256Input circuit for an HF-transmitting component
1956879638Method and apparatus for providing communication between electronic devices
1966876708Method and apparatus for demodulation of phase shift keyed signals
1976870390Tx line driver with common mode idle state and selectable slew rates
1986865236Apparatus, and associated method, for coding and decoding multi-dimensional biorthogonal codes
1996853310Tri-mode medical telemetry antenna system

2004

2006816559FSK modulation transceiver
2016774738Trimming method for a transceiver using two-point modulation
2026759969Fiberoptic transceiver system
2036757764Method and apparatus for transferring information using a constant frequency
2046724851FIR chip for use in a wireless subscriber unit
2056714983Modular, portable data processing terminal for use in a communication network
2066703896Method and demodulator for FSK demodulation, and receiver including such a demodulator device

2003

2076654378Transaction control system including portable data terminal and mobile customer service station
2086614853Method of transmission and device to carry out said method
2096614768Enhanced mobility and address resolution in a wireless premises based network
2106603821Wireless communication terminal capable of correctly specifying position of burst and having small frequency error of recovered carrier
2116597748Method and apparatus for receiving a signal
2126597208Digital synthesizer with coherent division
2136594328Method and apparatus for facilitating an estimation of a carrier frequency error in a receiver of a wireless communication system
2146587695Method and apparatus for distinguishing a compact control channel from a classic control channel
2156567474Digital wireless phone/modem jack capable of communications over the power lines using differential binary phase shift keying (DBPSK)
2166563884Method and apparatus for seamlessly changing the radio interface data rate in circuit switched transmission
2176556630Dual band telemetry system
2186546060Direct modulating FSK transmitter for MCA

2002

2196466614Method and apparatus for classifying a baseband signal
2206452461High-speed power-efficient coded M-ary FSK modulator
2216449317Digital synthesizer
2226441804Transmitter and receiver for use in a wireless cursor control system
2236420940Transmitter with a phase modulator and a phase locked loop
2246418174Frequency shift key modulator
2256415005Digital communication apparatus
2266414983Digital communication apparatus
2276397276Data transmission by an alternating-frequency analog signal
2286396882Frequency scanning type receiver
2296396431Precision microwave/millimeter wave modulated signal source
2306392499Frequency shift modulation circuit
2316389059Multi-band, multi-mode spread-spectrum communication system
2326377630Transmission circuit
2336345173Frequency modulator
2346335946Method and a device for broadband transmission

2001

2356329929Telemetry system with phase-locking noise suppressing receiver
2366301306Method and apparatus for generating a short-range wireless data communication link
2376288618Logic-based architecture for FSK modulation and demodulation
2386282246Frequency modulation method and modem unit employing such method
2396275539System and method for modulating a frequency signal
2406265948Image rejection in logic-based architecture for FSK modulation and demodulation
2416252913Method of transmitting a frequency-modulated asynchronous NRZ signal
2426236689Device comprising a phase-locked loop, electronic apparatus comprising such a device and method of modulating the frequency of an oscillator
2436198779Method and apparatus for adaptively classifying a multi-level signal
2446188275Demodulator tuned by use of a test signal
2456185264Apparatus and method for frequency shift keying
2466172579Three point modulated phase locked loop frequency synthesis system and method
2476169769Method and apparatus for bias suppression in a VCO based FM transmission system

2000

2486163229Frequency generator for generating two independent FSK signals
2496137846AFC circuit for a frequency scanning FSK receiver
2506081560Production of a frequency control signal in an FSK receiver
2516078578Communication apparatus
2526078226Integrated circuit implementation of a frequency shift keying oscillator
2536049257Method and arrangement for frequency modulation of a high-frequency signal
2546028886Digital communication apparatus
2556021163Inter-unit digital signal transmitting method, digital signal transmitter and receiver equipment, digital signal transmitter, and digital signal receiver

1999

2566008703Digital compensation for wideband modulation of a phase locked loop frequency synthesizer
2576002304Data modulation system using digital signal processing
2585995553Encoder/decoder for emergency alert system
2595991605Method and circuit for creating a modulated signal in a transceiver
2605946356Method and apparatus for data transmission within a broad-band communications system
2615940457Millimeter-wave (MMW) synthesizer with FSK modulation transmitter
2625936472Oscillating circuit with limitation function of oscillation frequency
2635933039Programmable delay line
2645912926Method of and apparatus for controlling modulation of digital signals in frequency modulated transmissions
2655905413Angular modulator with a phase variation divided and integrated
2665889783Data communication
2675889443Frequency synthesizing circuit using a phase-locked loop
2685887020Multi-band, multi-mode spread-spectrum communication system
2695878335Composite direct digital synthesizer
2705878084Method and apparatus for recovering the independent bit streams from each of two co-channel frequency modulated carriers
2715864577Method, transmitter and receiver for the transmission of information in packets having a header and subpackets
2725862190Method and apparatus for decoding an encoded signal
2735862155Trellis coded FM digital communications system and method

1998

2745850390Method for managing radio resources which transmits user data/information field within a time/frequency parallelogram separated from the header channel by a plurality of frequencies
2755841776Apparatus and method for a high throughput fiber-optic access network using code division multiple access
2765835539FSK modulator
2775835529Digital communication apparatus
2785820081Process and circiuit arrangement for the transmission of digital control data
2795818880MMIC telemetry transmitter
2805796772Multi-band, multi-mode spread-spectrum communication system
2815793795Method for correcting errors from a jamming signal in a frequency hopped spread spectrum communication system
2825793261Saw stabilized FSK oscillator circuit
2835790587Multi-band, multi-mode spread-spectrum communication system
2845790555Signal multiplexer and multiplexing method
2855790536Hierarchical communication system providing intelligent data, program and processing migration
2865789991FSK modulating and demodulating apparatus wherein each binary data is represented by same number of cycles of modulated signal
2875761259Apparatus, method and article of manufacture for carrier frequency compensation in a FM radio
2885757245Circuit for 2-level/4-level frequency shift key modulation
2895754587Method and apparatus for bias suppression in a VCO based FM transmission system
2905751114Apparatus, method and article of manufacture for carrier frequency compensation in a FM radio transmitter
2915742641Apparatus, method and article of manufacture for the dynamic compensation of FM deviation in a FM radio receiver
2925726984Hierarchical data collection network supporting packetized voice communications among wireless terminals and telephones
2935724380Radio transmission system
2945717721Demodulation correcting circuit for FSK receiver
2955712878Digital FSK modulator
2965706310Wide bandwidth loop in a frequency shift keying (FSK) system
2975705945Synthesizable architecture for all-digital minimal jitter frequency synthesizer

1997

2985694414Multi-band, multi-mode spread-spectrum communication system
2995689820Vehicle location unit
3005680633Modular, portable data processing terminal for use in a radio frequency communication network
3015679943Hand-held terminal with display screens, interactive screens, magnetic credit card readers, scanners, printers and handlers
3025661734Trellis coded FM digital communications system and method
3035657317Hierarchical communication system using premises, peripheral and vehicular local area networking
3045650739Programmable delay lines
3055644601Method and apparatus for bias suppression in a VCO based FM transmission system
3065638405Dual-mode baseband controller for radio-frequency interfaces relating to digital cordless telephones
3075638404Pre-compensated frequency modulation (PFM)
3085633894Circuit for modulating a sinusoidal waveform signal using digital pulse shaping
3095617063Matched filters for processing related signal components
3105612650Transmitting device for a frequency modulated digital transmission signal
3115608761Method, device, and radio for compensating for modulator frequency drift while allowing for data transmission

1996

3125579342Pre-compensated frequency modulation (PFM)
3135567925Hand-held data capture system with interchangeable modules
3145555276Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
3155550865Frequency modulator for data transceiver
3165535229Digital data transfer system for use especially with advertisement insertion systems
3175533056Data encoder/decoder for data transceiver
3185532654FSK modulator using saw resonator with switchable capacitors
3195521947Phase detection reset in phase locked loops used for direct VCO modulation
3205517433Parallel digital data communications
3215515364Radio frequency telecommunications transceiver
3225513219Apparatus and method for transmitting information with a subminimally modulated transmission signal
3235494490Oxidative dyeing compositions containing 4-hydroxy or 4-aminobenzimidazole or derivatives thereof as couplers, and process for implementation
3245493583Wireless data transceiver
3255487183Method and apparatus for a data transmitter
3265485129Method and apparatus for digital modulation using pulse deletion

1995

3275471187Data signal comparation with self-adjusting threshold
3285467373Digital frequency and phase modulator for radio transmission
3295461632Trellis coded FM digital communications system and method
3305453714Binary FM demodulator with self-adjusting resonant operating frequency according to demodulated binary output signal duty cycle
3315450086Self-tuning receiver/decoder for frequency shift keying RF data transmission
3325444737Wireless data transceiver
3335444415Modulation and demodulation of plural channels using analog and digital components
3345436599Method and apparatus for digital modulation using pulse addition
3355434888FSK modulating apparatus
3365410315Group-addressable transponder arrangement

1994

3375367537Saw-based FSK modulating circuit
3385365548Digital FSK transmitter
3395365546Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
3405363409Method and system for multiplexed data transmission from hazardous environments
3415361046Modulator having fractional sample/symbol time
3425351249Trellis coded FM digital communications system and method
3435345473Apparatus for providing two-way communication in underground facilities
3445331136Hand-held data capture system with interchangeable modules
3455329258Multilevel FSK modulator having phase locked loop with controlled transient response
3465323125Frequency agile method for transmitting multi-level data
3475313053Laser scanner module having integral interfacing with hand-held data capture terminal
3485311556Digital FSK transmitter receiver and method of operating same
3495303412Composite direct digital synthesizer
3505291516Dual mode transmitter and receiver
3515289500Signal conditioner
3525281079Automatic manipulator with reservoir and methods

1993

3535274490Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver
3545263046Spread-spectrum chirp communication with sharply defined bandwidth
3555255269Transmission of data by frequency modulation using gray code
3565254958Phase-lock-loop circuit and method for compensating, data bias in the same
3575245631Process and device for transmitting numerical data
3585241566Full duplex FSK system
3595227741Variable speed asynchronous modem
3605218187Hand-held data capture system with interchangeable modules
3615208835Automatic frequency control system and method for frequency-shift-key data transmission systems
3625205294Apparatus and methodology for digital telemetry of biomedical signals
3635204642Frequency controlled recursive oscillator having sinusoidal output
3645189381Apparatus for generating a sinusoidal output signal

1992

3655157358High speed frequency agile FSK modulator
3665155446Digital FSK demodulator
3675132829Tone spacing and power level monitor for FSK lightwave systems
3685130676Phase locked loop frequency synthesizer with DC data modulation capability
3695113278Communication system and apparatus using chip signals
3705105444System for high speed data tranmission
3715105294Digital communicating method and apparatus
3725091921Direct conversion receiver with dithering local carrier frequency for detecting transmitted carrier frequency
3735084681Digital synthesizer with phase memory
3745081712Method and apparatus for obtaining phase in sensitive and/or polarization-insensitive optical heterodyne receiver for a fsk-modulated transmission signal

1991

3755073903Information transmission arrangement using frequency modulation
3765073331Modulation method for use in a semiconductor laser and an apparatus therefor
3775053728Phase locked loop frequency modulator using data modulated digital synthesizer as reference
3785052020Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
3795023950Optical transmitter, optical receiver and optical transmission apparatus and control method of optical receiver
3805023949Apparatus for generating an FSK-modulated optical signal having two different polarization conditions for an optical transmission system having an optical two-filter FSK super-heterodyne receiver
3815020077Modem and data communication system
3825016260Modulator and transmitter
3835016259Low jitter DDFS FSK modulator
3845010585Digital data and analog radio frequency transmitter

1990

3854959827Laser signal mixer circuit
3864926444Data transmission method and apparatus by period shift keying (TSK)

1989

3874878035Hybrid frequency shift keying modulator and method
3884871987FSK or am modulator with digital waveform shaping
3894868863Apparatus for connecting data processing equipment to a communication network
3904866771Signaling system
3914847872Method and arrangement for synchronizing a receiver in digital transmission systems

1988

3924761751Method and apparatus for generating digital signals representing periodic samples of a sine wave
3934740995Variable frequency sinusoidal signal generator, in particular for a modem
3944724534Method and apparatus for transmitting binary data signals by frequency shift keying
3954723310Digital data transmission system by coherent light wave modulation

1987

3964715045System protocol for composite shift keying communication system
3974695931Voltage/frequency converter with frequency drift compensation loop
3984694471Digital data communicating
3994689803Antenna tuning system and method
4004689801Microprocessor FSK data communications module
4014686490Digital data modulator and digital-to-analog converter
4024682344Rf fsk transmitter
4034682117Quadrature demodulation data receiver with phase error correction
4044672636AFC circuit for direct modulation FM data receivers
4054670888Frequency modulated modem transmitter
4064669094FSK data receiver
4074649551Decoder for a frequency-keyed signal, particularly an FSK-video text signal
4084648099Digital minimum shift keyed modulator

1986

4094631694Sine wave synthesizer
4104627078Data communication system
4114622681Apparatus for transmitting digital data
4124618966Frequency shift key modulator
4134617656Information transmission system with modems coupled to a common communication medium
4144616364Digital hopped frequency, time diversity system
4154609886PLL modulation circuit
4164608699Simulcast transmission system
4174606049Remote transmitter control system
4184596022FSK data communication system
4194596011Data transmission system for a local network
4204583231Method of, and apparatus for, frequency-hopped frequency-shift-keyed digital data communications
4214578798Method for communicating binary data using modified frequency shift keying techniques
4224577333Composite shift keying communication system
4234573165Transmission circuit for modems employing frequency shift keying
4244569060FSK Coding method and apparatus involving multiples and submultiples of a given frequency
4254567603FSK Modulator and method for NRZ data transmission utilizing PLL frequency synthesis

1985

4264556866Power line carrier FSK data system
4274555792Transmitter for transmitting an FSK-modulated signal
4284550292Automatic oscillator frequency control system
4294549302Modem with improved escape sequence mechanism to prevent escape in response to random occurrence of escape character in transmitted data
4304543541FSK modulation using switched outputs of two oscillators
4314540958Zero if frequency-modulator
4324538136Power line communication system utilizing a local oscillator
4334528675FSK modem for bidirectional loop communications system
4344523158Clock regenerator using two on-off oscillators
4354520493Adaptive recursive frequency offset tracking system
4364518922Decision-directed, automatic frequency control technique for non-coherently demodulated M-ARY frequency shift keying
4374500857Frequency modulated phase locked loop
4384498198Binary signal decoding apparatus and method
4394492936Fractional-division frequency synthesizer for digital angle-modulation

1984

4404488120Frequency shift keying demodulator using a phase locked loop and voltage comparator
4414481642Integrated circuit FSK modem
4424481489Binary signal modulating circuitry for frequency modulated transmitters
4434480327Single channel duplex communication system
4444476348Carbon microphone linearization technique
4454475216FSK Data transceiver
4464472810Charge-transfer modulator-demodulator
4474471328Variable frequency reference source responsive to digital data
4484471312Integrated circuit demodulator for FSK signals
4494468792Method and apparatus for data transmission using chirped frequency-shift-keying modulation
4504466106Frequency shift keyed modem chip set
4514464766Radio transmission system for binary coded signals
4524463452Tracking and telemetry system for severe multipath acoustic channels
4534453258Automatic gain control circuit
4544441193Frequency-encoding circuit for reducing distortion
4554440988Modem with low part count and improved demodulator
4564438519Methods, and apparatus, for transmitting high-bit-rate digital data in power line communication media having high harmonic noise content
4574431867Modem with low part count and improved demodulator
4584425666Data encoding and decoding communication system for three frequency FSK modulation and method therefor
4594425665FSK Voiceband modem using digital filters

1983

4604417349SCA Data transmission system with a raised cosine filter
4614411005Data circuit for frequency modulating an oscillator
4624390863System for the transmission of binary signals between the components of an alarm system
4634389622System for preventing transient induced errors in phase locked loop
4644388726System for the ultra-high frequency transmission of numerical data
4654384356Wide band modem for high speed data transmission
4664380009Message communication system
4674370747Data transmission
4684369425Voiced alerting system
4694368439Frequency shift keying system

1982

4704346448Generation of electric signals having approximately sinusoidal waveforms
4714336613Charge coupled device filters and modems incorporating such filters
4724330687Audio and full duplex digital data carrier system
4734323862Frequency shift modulator with circuitry for simple change-over between high and low channels
4744320522Programmable frequency and signalling format tone frequency encoder/decoder circuit
4754320361Amplitude and frequency modulators using a switchable component controlled by data signals
4764317209FSK Tone generator circuit

1981

4774308508Phase locked loop frequency modulator
4784302629Digital data transmission system
4794292800Textile machine data link apparatus
4804284979Coding system for simultaneously signaling selected ones of a plurality of devices
4814277778Information transmitting system
4824259648One-bit frequency-shift-keyed modulator

1980

4834229819Data transmission system
4844209750Swept-carrier transmission system adapted for use in process control systems
4854199821Data transmission
4864199761Multichannel radio communication system for automated power line distribution networks
4874188583Sampling method and apparatuses
4884184116Communication system having analog-to-digital-to-analog conversion means

1979

4894179660Method and device for transmitting pulse-duration modulated signals using two oscillators
4904170764Amplitude and frequency modulation system
4914160121Frequency shift keyed tone generator
4924142245Multi-frequency digital wave synthesizer for providing analog output signals
4934136327Well survey system modulation technique

1978

4944121056Time division digital multiplexer apparatus
4954103244FSK demodulator
4964100373Adaptive linearizing acoustic coupling system
4974090138FSK Transmitter having frequency band-limitation
4984090135Wireless FSK technique for telemetering underground data to the surface
4994072905Wide acquisition range MSK demodulator input circuit
5004066841Data transmitting systems

1977

5014064487Receiver and decoder
5024039952Digital frequency shift-keyed transmitter
5034015220Frequency shift keyed toned generator
5044013965Circuit for preventing errors in decoding information from distorted pulses
5054011511Frequency-shift digital data link and digital frequency detection system
5064008378Multi-radix digital communications system with time-frequency and phase-shift multiplexing

1976

5073997855Digital FSK time rate of change modulator
5083991389Digital frequency shift key modulator
5093987374Multi-line, multi-mode modulator using bandwidth reduction for digital FSK and DPSK modulation
5103967202Data transmission system including an RF transponder for generating a broad spectrum of intelligence bearing sidebands
5113962653Arrangement for simultaneously producing signals having an increasing frequency and signals having a decreasing frequency
5123958191Multi-line, multi-mode modulator using bandwidth reduction for digital FSK and DPSK modulation
5133944742Burst frequency shift keying data communication system
5143939473Process for correcting signal distortions
5153932704Coherent digital frequency shift keying system
© 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017