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7394869 RF transmitter architecture for continuous switching between modulation modes  
The present invention provides a radio transmitter having a digital modulator that further includes logic for continuous amplitude and continuous phase modulation switching in an RF transmitter...
7394862 Multi-mode wireless polar transmitter architecture  
A radio transmitter within a transceiver includes a digital processor and analog circuitry for modulating and transmitting an outgoing digital signal in multiple modes of operation. The digital...
7376173 Unambiguously encoding and decoding signals for wireless channels  
A method encodes a sequence of blocks of input bits to be transmitted over a wireless channel. Each block of input bits is converted to a codeword, and each codeword is mapped to multiple...
7369629 FSK signal demodulation circuit  
A demodulation circuit for demodulating an FSK signal comprising a long bit having a long bit period and a short bit having a short bit period comprises a bit boundary detection section for...
7359456 Communication system and communication device  
A communication system for transmitting a transmission signal in digital form from a transmitter to a receiver is disclosed. The transmitter includes a modulation part modulating a carrier wave in...
7308043 Scrambled chirp frequency jitter for feature suppression  
A method of minimizing detectability of an electronically communicated message is disclosed. A predetermined frequency modulation pattern about a nominal transmission frequency is defined. The...
7292645 Binary transmitter and method of transmitting data in binary format  
The present invention provides a binary transmitter. In one embodiment, the binary transmitter includes a data coder that receives and encodes binary data to be transmitted and a modulator that...
7269228 Non-coherent frequency shift keying transmitter using a digital interpolation synthesizer  
A non-coherent frequency shift keying transmitter for up-converting a baseband signal to a radio frequency signal is provided. The non-coherent frequency shift keying transmitter applies the...
7263137 Multivalued FSK modulation system  
A multivalued FSK modulation system is provided in which when data to be transmitted is multivalued and transmitted/received, the detection level is different every symbol. When a two-valued signal...
7249008 Arrangement for runtime compensation of a runtime difference arising through emulation of a high frequency signal  
An arrangement for runtime compensation of a runtime difference, arising through emulation of a high frequency signal, is disclosed, with a signal x(t), for emulation by a signal processing device,...
7239625 Low-cost noise-immune wireless methodology for demand control ventilation (DCV) Applications  
A method for reducing the cost of demand control ventilation applications deploys wireless CO2 sensors inclusive of relative humidity and temperature throughout an indoor space without the need for...
7231190 Method and apparatus for terminating reception in a wireless communication system  
A receiver front end ( 302 ) receives a known Stop Waveform ( 114 ) comprising a predetermined symbol pattern on a voice channel, the Stop Waveform sent at the end of a transmission. A processor (...
7200184 Data dithering apparatus and method  
A waveform having an amplitude that varies to thereby represent corresponding data values is dithered to further shape the waveform so that use of the dithered waveform to create a corresponding...
7129802 Method for estimating a carrier leak, an estimator and modulation system provided with automatic control of a carrier using said system  
The invention relates to a method of estimating a carrier leak making it possible to solve the accuracy degradation problem associated with a poor reception by the central carrier. A subject of...
7123666 Gaussian minimum shift key transmitter with feedforward phase compensation  
A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase...
7123665 Method and apparatus for measuring phase error of a modulated signal  
A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase...
7103113 Analog FSK modulator for a radio transmitter  
A transceiver includes a transmitter portion with an analog modulator that modulates data using frequency shift keyed (FSK) modulation techniques to increase efficiency, reduce power consumption,...
7103108 Digital signal processor transceiver  
A digital signal processor transceiver uses a finite impulse response filter memory to construct a phase integrated angle at each clock cycle. The FIR filter memory is addressed by a multibit...
7076217 Integrated radio transceiver  
A radio transceiver comprises a reception path, a transmission path, and a frequency generator with a programmable phase lock loop. The reception path, the transmission path, and the frequency...
7058114 Wireless device and method  
A high speed Bluetooth system with switch-to quadrature amplitude modulation allows for simple mobile devices with video data rates in applications such as Internet downloading. Mobile devices may...
7027524 Method of transmitting and receiving QPSK digital signals  
A method of transmitting QPSK digital signals in which each 2-digit binary number, referred to as a symbol, is assigned a phase of a carrier, and symbols are added to enable error correction at the...
7026864 Non-coherent FSK demodulator  
A non-coherent frequency shift key demodulator comprising an oversampling device, a chain of registers, and a threshold device is disclosed. The oversampling device receives an input digital...
7016429 Training sequences for peak to average power constrained modulation formats  
A method and apparatus are provided that generate, transmit, or receive a training sequence in a communications system, where the training sequence exhibits certain desirable characteristics when...
7015749 Frequency discriminator using replica compensated delay lines and method of operation  
A frequency discriminator for detecting phase shifts between sequential pulses in a frequency-shift keyed (FSK) signal having a nominal frequency, f. The frequency discriminator comprises: 1) a...
6862313 Direct conversion spread spectrum time division duplex radio  
A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. A...
6785514 Method and radio station for transmitting information  
A method and radio station for transmitting information, wherein frequency channels of a frequency band are arranged in accordance with a first coarse raster system and a second fine raster system,...
6690741 Ultra wideband data transmission system and method  
A data-modulated ultra wideband transmitter that modulates the phase, frequency, bandwidth, amplitude and/or attenuation of ultra-wideband (UWB) pulses. The transmitter confines or band-limits UWB...
6600382 Microwave phase modulator  
A phase modulator for direct wideband linear phase modulation of a microwave continuous wave carrier signal which is suitable for many analog and digital phase or frequency modulation techniques....
6546060 Direct modulating FSK transmitter for MCA  
A direct modulating frequency shift keying transmitter for multi channel access is constructed so that a transmission signal from a voltage controlled oscillator (VCO) in a phase lock loop...
6480553 Gaussian frequency-shift keying transciever for ISM wideband communication  
A GFSK (Gaussian Frequency Shift Keying) radio transceiver is provided for ISM (Industrial Scientific and Medical) wideband communication. The GFSK radio transceiver includes a transmitter for...
6452461 High-speed power-efficient coded M-ary FSK modulator  
A high-speed power-efficient coded M-ary Frequency-Shift Keying (M-ary FSK) modulator. The modulator includes a coding logic, which generates (M/2) Gray code signals in accordance with an (N−1)...
6449317 Digital synthesizer  
The present invention is a method and system for processing communication signals in a wireless telecommunication system having at least two subscriber units. The subscriber units communicate with...
6438176 Digital gaussian frequency shift keying modulator  
A GFSK modulator suitable for use in an RF communication system comprising a modular subsystem and a baseband processor subsystem which is implemented digitally. The baseband processor subsystem...
6434135 Adaptive RF amplifier prelimiter  
The invention reduces transient peaks in signals transmitted in CDMA communication systems. A plurality of spread spectrum data signals are combined into a combined signal having fluctuating power...
6418174 Frequency shift key modulator  
The present invention provides an FSK modulation circuit and technique that controls a prescaler to generate an FSK output. In particular, a VCO output is sent to a prescaler controlled by a...
6411646 Direct conversion time division duplex radio, direct sequence spread spectrum cordless telephone  
A wireless transceiver comprises a digital to analog converter having an input for receiving a digital representation of a direct sequence spread spectrum signal and having an analog output. A...
6396355 Signal generator having fine resolution and low phase noise  
A signal generator includes an oscillator, a phase locked loop and a fractional divider. The oscillator is configured to provide an output signal. The phase locked loop is configured to receive the...
6392499 Frequency shift modulation circuit  
A frequency shift modulation circuit has a direct digital synthesizer DDS and a phase-locked loop PLL. DDS stores output signal frequency data in a plurality of registers. DDS selects the register...
6366772 Caller identification delivery in a wireless local loop or other systems  
A method of communicating FSK-modulated Caller ID signals through a network incompatible to the transmission of these signals is presented. A first network component couples between the...
6317009 Frequency shift key modulating oscillator  
The present invention teaches a system for selectably oscillating at a first or a second oscillating frequency. The system comprises an oscillator for providing an oscillating output. Moreover, the...
6307441 Shape modulation transmit loop with digital frequency control and method for same  
A shape modulation transmit loop with digital frequency control permits spectral shaping of a digital pulse stream (12) by controlling the slew rate of the transition signal (16) between successive...
6289056 Broadband multicarrier modulator and corresponding programming method  
In a broadband multicarrier modulator, all processing within a modulator is replaced by a pre-computed table so that a modulated signal can be produced as a function of the modulating signal merely...
6282246 Frequency modulation method and modem unit employing such method  
A frequency modulation method and modem unit for a frequency modulation using a common filter which uses a large number of carrier frequencies include a frequency-shifting unit for subjecting an...
6282236 Modem designs, and systems using the modem designs for communicating information between a number of remote locations and one or more central locations  
Various modem designs are described, along with systems that use the modem designs for communicating data between a large number of remote locations and one or more central locations preferably...
6225873 Frequency shift key modulating oscillator  
The present invention teaches a system for selectably oscillating at a first or a second oscillating frequency. The system comprises an oscillator for providing an oscillating output. Moreover, the...
6185264 Apparatus and method for frequency shift keying  
A transmitter for generating and transmitting frequency shift keying signals. The transmitter comprises a resonant circuit, a capacitor, a switch for coupling and decoupling the capacitor to the...
6157271 Rapid tuning, low distortion digital direct modulation phase locked loop and method therefor  
A direct modulation phase lock loop (PLL) a voltage controlled oscillator (VCO) (114). A divider (118) has a first divider input coupled to the VCO and a second divider input to receive a...
6101213 Method system and computer program product for spread spectrum communication using circular waveform shift-keying  
A method, system, and computer program product for spread spectrum communication is provided using circular waveform shift-keying (CWSK). Circular waveform shift-keying is a modulation technique...
6034990 Digital radio transmission and reception system applying a direct modulation and demodulation method  
A digital radio transmission and reception system capable of preventing shift of carrier by fading through receiving a modulated signal radio-transmitted, and then directly demodulating the signal....
6008703 Digital compensation for wideband modulation of a phase locked loop frequency synthesizer  
A digital compensation filtering technique is provided that enables indirect phase locked loop modulation with a digital modulation data stream having a bandwidth that exceeds, perhaps by an order...
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