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| Number | Title | Issue Date |
| 8050359 | Continuously variable phase frequency shift keying Method for modulating an RF signal includes the steps of modulating an RF signal using frequency shift keying (FSK) modulation to define a plurality of symbols (2030, 2031). The FSK modulation includes transitioning the modulated ... | 11/01/2011 |
| 7995675 | Apparatus and method to communicate information within a data storage library A method to communicate information within a data storage system comprising a plurality of enclosures, wherein the method defines and stores a first waveform comprising a frequency FB, a second waveform comprising a frequency F0 wherein that se... | 08/09/2011 |
| 7933358 | GFSK/FSK modulation circuit and related method implemented in a digital manner A Gaussian Frequency Shift Keying/Frequency Shift Keying (GFSK/FSK) modulation circuit implemented in a digital manner comprises a frequency divider for dividing frequency of an inputted clock signal to get a sampling signal, a buffer coupled to the frequency divide... | 04/26/2011 |
| 7885353 | Spread spectrum block control apparatus and spread spectrum clock generating apparatus Disclosed is an SSC controller that exercises control to supply a control signal to a phase interpolator which receives an input clock signal and varies the phase of an output clock signal in accordance with the control signal, and to frequency-modulate the output c... | 02/08/2011 |
| 7860187 | FSK signal modulator for producing a binary FSK signal An FSK signal modulator is provided in a transmitter which receives desired information to be transmitted on its input and which modulates the information to be transmitted to transmit a binary FSK signal. A counter counts a value of addition with the value of addit... | 12/28/2010 |
| 7804916 | Detector for detecting a frequency-shift keying signal by digital processing A frequency-shift keying (FSK) signal detector includes a binarizing circuit for receiving an FSK signal and expressing amplitude of the FSK signal in binary; a correlator for receiving the FSK signal expressed in binary and acquiring a correlation of the FSK signal... | 09/28/2010 |
| 7564923 | Frequency offset and method of offsetting A transmitter digital signal processor (DSP) circuit has a transmit frequency represented by n-bit data output from a look up table (LUT). The n-bit data is outputted to an n-bit accumulator structured to overflow at a rate based on the output n-bit data to output a... | 07/21/2009 |
| 7542520 | Apparatus and method for implementing a low complexity digital modulator A low complexity digital modulator, which is particularly useful for providing Gaussian frequency shift keying (GFSK) modulation, includes a filter, an integrator and a look-up table (LUT) stage. The filter is configured to receive a series of impulses and to genera... | 06/02/2009 |
| 7474709 | Frequency shift keying modulator and applications thereof An FSK modulator and applications thereof are disclosed. The FSK modulator comprises a phase-locked loop, a frequency divider module, an image rejection mixer and a summing module. The phase-locked loop is operably coupled to generate a first oscillation from a refe... | 01/06/2009 |
| 7463698 | Transmitter and transmission control method A transmitter has a peak reducing part carrying out peak reduction processing; an OFDM signal generating part generating an OFDM signal from an input information signal; a cyclic shifting part generating a signal obtained from cyclically shifting the OFDM signal; an... | 12/09/2008 |
| 7424662 | Method and system for providing low density parity check (LDPC) encoding An approach is provided for a method of encoding structure Low Density Parity Check (LDPC) codes. Memory storing information representing a structured parity check Matrix of Low Density Parity Check (LDPC) codes is accessed during the encoding process. The informati... | 09/09/2008 |
| 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 processor digitally modulates the outgoing digital signal to produce one... | 07/01/2008 |
| 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 intended to support both frequency shift keying (FSK) and phase shift ke... | 07/01/2008 |
| 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 sub-blocks of complex numbers. Each sub-block is multiplied by a disambiguatin... | 05/20/2008 |
| 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 detecting a bit boundary timing of each bit, and a bit determination section... | 05/06/2008 |
| 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 accordance with the transmission signal according to frequency modula... | 04/15/2008 |
| 7349488 | Frequency shift keying signaling for integrated circuits The present invention relates to a system for communicating between two integrated circuits (ICs) or within an IC. The ICs are either on the same circuit boards or on different circuit boards with a common backplane. A first integrated circuit has transmitter circui... | 03/25/2008 |
| 7340011 | Method of frequency multiplication in a radiocommunications apparatus Radiofrequency apparatus and method including at least one transmitter and/or receiver of a useful signal S0, at least one device adapted to the application of a coefficient N to the useful signal S0. The method includes modulating the useful s... | 03/04/2008 |
| 7336938 | Phase-alternating mixer with alias and harmonic rejection Rejection of local oscillator alias response is provided in a mixing circuit by (1) a switching mixer producing an output that changes at least twice between two states (e.g., high-low-high or low-high-low) during each local oscillator period, and (2) a charge integ... | 02/26/2008 |
| 7319427 | Frequency diverse array with independent modulation of frequency, amplitude, and phase Method and apparatus for a frequency diverse array. Radio frequency signals are generated and applied to a power divider network. A progressive frequency shift is applied to all radio frequency signals across all spatial channels. Amplitude weighting signals are app... | 01/15/2008 |
| 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 predetermined frequency modulation pattern is suitable to vary the nomina... | 12/11/2007 |
| 7301440 | Power line communication system and method The present invention provides a device for providing communications through power lines comprised of multiple conductors by transmitting the data signals through a plurality of the conductors. One embodiment of the present invention may be comprised of a transmit c... | 11/27/2007 |
| 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 employs the binary data directly to modulate a carrier wave to yield a s... | 11/06/2007 |
| 7283012 | Tri-state pulse density modulator A tri-state pulse density modulator includes a first switch device coupled to a high voltage, and a second switch device coupled to a low voltage. An adder receives a pulse density modulation (PDM) input signal and a latched input signal to generate an output sum si... | 10/16/2007 |
| 7283916 | Distributed utility monitoring, such as for monitoring the quality or existence of a electrical, gas, or water utility In a system for automatic meter reading of utility meters, a utility supply measuring system may include one or more collector units, wherein each one of the collector units accesses a supply of a utility, wherein the accessing occurs in addition to receiving meter ... | 10/16/2007 |
| 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 interpolation method in a digital frequency synthesizer to replace the conv... | 09/11/2007 |
| 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 is transmitted as one symbol, data (11), (01), (00) and (10) are pre... | 08/28/2007 |
| 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, which emulates the signal x(t) with a signal x(t) and a device for d... | 07/24/2007 |
| 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 wiring while utilizing the license-free 902-908 MHz ISM band by use ... | 07/03/2007 |
| 7236765 | Data communication over power lines A system for receiving and processing signals received from a plurality of endpoints. Each endpoint includes an endpoint transmitter in electrical communication with a power distribution line within a power distribution system. The system comprises a power line coup... | 06/26/2007 |
| 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 (304) coupled to the receiver front end terminates ( | 06/12/2007 |
| 7227909 | High-quality power ramping in a communications transmitter The present invention, generally speaking, provides for control of a modulator, such as a polar modulator or conventional linear modulator, to produce high quality RF signals that ramp quickly from a condition of minimal output power to a condition of information-be... | 06/05/2007 |
| 7215713 | Method to minimize compatibility error in hierarchical modulation The present invention involves a method and system for transmitting two levels of data in a hierarchical transmission schema. A first modulated signal is generated based on first input. A second modulation signal is generated based on a second input that has a data ... | 05/08/2007 |
| 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 FSK signal will result in a signal having a smoothed frequency domain p... | 04/03/2007 |
| 7180850 | Frequency offset differential pulse position modulation The present invention provides such a need by utilizing a frequency offset differential pulse position modulation scheme to transmit data between computing devices within a wireless network system. The differential pulse position modulation component of the scheme e... | 02/20/2007 |
| 7146149 | High isolation switch buffer for frequency hopping radios A local oscillator (LO) circuit is disclosed which provides improved isolation between the unselected LO source and a mixer. The LO circuit includes a first LO source to generate a first periodic signal cycling at a first frequency, a second LO source to generate a ... | 12/05/2006 |
| 7132819 | Floating power supply and method of using the same A power supply of the present invention comprises a transducer having a transducer and a voltage regulator. The transducer is coupled to an electrically non-conductive medium, which may be a light pipe. The electrically non-conductive medium is coupled to a non-elec... | 11/07/2006 |
| 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 said invention is a method of estimating a carrier leak consistin... | 10/31/2006 |
| 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 preemphasis coefficients for compensating the frequency conversion gain of the... | 10/17/2006 |
| 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 preemphasis coefficients for compensating the frequency conversion gain of the... | 10/17/2006 |
