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| Number | Title | Issue Date |
| 8174310 | Quadrature modulation demodulation circuit A quadrature demodulation circuit includes: first to fourth mixers to receive a modulation signal; a phase shifter to supply to the first and third mixers a first local frequency signal, to supply to the second mixer a second local frequency signal having a designat... | 05/08/2012 |
| 7898322 | Demodulator for a low power radio receiver Frequency demodulation of a signal is disclosed. A first edge event and a second edge event are detected in a signal. The second edge event is an edge event subsequent in time to the first edge event. A data bit based at least in part on a timing interval between th... | 03/01/2011 |
| 7439799 | Frequency shift keying demodulator robust for frequency offset A frequency shift keying demodulator robust for frequency offset is provided. The demodulator is used to enable the signal to be received correctly when the frequency offset occurs. A microprocessor of demodulator controls a frequency mixer and a phase difference ge... | 10/21/2008 |
| 7359472 | Method and apparatus for wireless data transmission A method and apparatus for wireless data transmission between a base station and one or more, in particular, passive and/or backscatter-based transponders, in which the base station modulates a carrier signal with a modulation signal, to generate synchronization mar... | 04/15/2008 |
| 7356324 | Mobile radio receiver device The invention is directed to a receiver arrangement, for example, in a mobile radio, which allows the use of slowly locking phase locked loops for a point-to-point connection between two transceivers, even in the case of a heterodyne receiver structure. The need to ... | 04/08/2008 |
| 7356077 | Method and apparatus for testing network integrity Apparatuses and methods for testing the integrity of high speed optical fiber transmission networks are presented. Data from an optical network, for example, NRZ formatted data at forty gigabits per second and higher may be reliably recovered using embodiments of th... | 04/08/2008 |
| 7352795 | System and method for communicating data using constant amplitude waveform with hybrid orthogonal and MSK or GMSK modulation A communications system of the present invention includes a transmitter that is operative for combining an orthogonal Walsh modulation with a minimum shift keying or Gaussian minimum shift keying waveform to form a hybrid communications signal that carries communica... | 04/01/2008 |
| 7339809 | Systems and methods for electrical power regulation and distribution in aircraft The present invention comprises systems and methods for electrical power regulation and distribution. In an embodiment, a system includes a modulator coupled to the source that receives an unregulated output waveform and is operable to produce a first composite wave... | 03/04/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7292651 | Pilot-aided channel estimation for OFDM in wireless systems A method and apparatus for pilot-symbol aided channel estimation in a wireless digital communication system which transmits packets of N OFDM data blocks, each data block comprising a set of K orthogonal carrier frequencies. At the transmitter, pilot symbols are ins... | 11/06/2007 |
| 7293250 | Method of modeling physical layout of an electronic component in channel simulation A method of developing the physical layout of an electronic component in a data bus connected logic analog system includes: providing a data bus connected logic analog system modeled as a software-implemented channel simulation model including: a bit pattern generat... | 11/06/2007 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7286615 | FSK signal detector A detector includes a binarizer for binarizing the amplitude of an input FSK signal; a 2n-stage shift register having 2n registers for sequentially shifting the FSK signal binarized by the binarizer in response to a clock; and an adder for calculating a sum of a tot... | 10/23/2007 |
| 7279989 | Apparatus, system and method capable of clock noise mitigation using a frequency adaptive process An embodiment of the present invention provides an apparatus, comprising an oscillator capable of generating a clock signal, wherein said apparatus is capable of clock noise mitigation using a frequency adaptive algorithm, technique, process or system. And wherein s... | 10/09/2007 |
| 7245655 | Dual antenna receiver Structures and techniques for implementing multiple-antenna configurations within a radio frequency receiver are provided. In one aspect, a modularized multi-antenna receiver is provided having multiple independent microelectronic dice mounted on a common module sub... | 07/17/2007 |
| 7235939 | Method for detecting the angular position of a rotor in a brushless electric motor A method for detecting the angular position of a rotor in a brushless electric motor, of the type in which the emission of a polarity signal of the back electromotive force by a detection circuitry associated with the motor, includes the using a bi-directional count... | 06/26/2007 |
| 7200188 | Method and apparatus for frequency offset compensation Frequency offsets between a received carrier signal and a receiver's LO frequency are compensated by determining the offset and adjusting the phase of a demodulated signal derived from the modulated carrier. For frequency offsets that produce DC voltage offsets in I... | 04/03/2007 |
| 7116964 | Signal reception and processing method for cordless communications systems Channel selection of a received signal is first of all carried out, in the process, by way of an analog channel selection filter. The signal is then converted to a digital discrete-time and discrete-value signal. Finally, the continuous-time and continuous-value sig... | 10/03/2006 |
| 7110476 | Demodulation and modulation circuit and demodulation and modulation method A demodulation circuit and a demodulation method can optimize sampling timing with achieving reduction of power consumption. A preliminarily known signal is inserted in the digital transmission signal upon transmission. The demodulation circuit includes A/D converti... | 09/19/2006 |
| 7110477 | Gaussian frequency shift keying digital demodulator A digital demodulator employing a digital differential detection mechanism based on extracting phase differences directly from the I and Q signals after downconversion to zero-IF and image rejection are performed. The phase of the input I and Q signals is determined... | 09/19/2006 |
| 7110435 | Spread spectrum applications of universal frequency translation Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an... | 09/19/2006 |
| 7110444 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 09/19/2006 |
| 7092687 | Five-port topology for direct down-conversion An apparatus for a direct down-conversion of modulated RF signals, the device including: a first power detector connected between an input port for the modulated RF signal and ground, which outputs a first DC signal, a second power detector connected between an inpu... | 08/15/2006 |
| 7082171 | Phase shifting applications of universal frequency translation A universal frequency translation module (UFT) frequency translates an electromagnetic (EM) input signal by sampling the EM input signal according to a periodic control signal (also called an aliasing signal). By controlling the relative sampling time, the UFT modul... | 07/25/2006 |
| 7079602 | Receiving apparatus and method and provision medium An interference signal from an adjacent signal is prevented and a desired signal demodulated. A frequency conversion circuit 4 converts a received signal frequency to a first intermediate frequency signal of a first intermediate frequency higher than t... | 07/18/2006 |
| 7072390 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 07/04/2006 |
| 7058382 | Method of eliminating a DC component and filtering device obtained by this method A radiotelephony device employing filters and methods for eliminating a DC component from an electronic signal provide for circuitry having a zero corresponding to a cut-off frequency, and circuitry for shifting the zero by an amount corresponding to the absolute va... | 06/06/2006 |
| 7054296 | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, ... | 05/30/2006 |
| 7054778 | Method and device for processing analogue output signals from capacitive sensors An analogue output signal of a sensor which comprises a carrier signal with a carrier frequency ωC which is modulated by a measurement size is sampled with a sampling frequency ωA to receive a sampled sensor output signal. The frequency ω | 05/30/2006 |
| 7049884 | Demodulation arrangement for a radio signal A demodulation arrangement for a radio signal is disclosed wherein an I/Q mixer converts the radio signal to a real and an imaginary component and supplies the components to a limiting circuit. The limiting circuit limits the amplitude of the signals applied to its ... | 05/23/2006 |
| 7039372 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 05/02/2006 |
| 7035351 | Automatic gain control loop apparatus A DC offset cancelling circuit with multiple feedback loops suppresses DC offset voltages within an automatic gain control loop apparatus. The apparatus includes a plurality of gain stages connected in series that receive and amplify an input RF signal. Each gain st... | 04/25/2006 |
| 7027786 | Carrier and clock recovery using universal frequency translation Coherent detection of a received EM signal using universal frequency translation (UFT) is described herein. The received EM signal is sampled according to a sub-harmonic LO signal, where the LO signal is in frequency and phase coherence with the received EM signal. ... | 04/11/2006 |
| 7019599 | Apparatus for continuous phase quadrature amplitude modulation and demodulation An apparatus for continuous phase quadrature amplitude modulation and demodulation to continuously process phases and amplitudes at symbol change points in an M-ary quadrature amplitude modulation method. The apparatus includes a continuous phase quadrature modulato... | 03/28/2006 |
| 7010286 | Apparatus, system, and method for down-converting and up-converting electromagnetic signals Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive o... | 03/07/2006 |
| 7006805 | Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver operates in a plurality of modes, including but not limited to a sin... | 02/28/2006 |
| 7006556 | Method and apparatus for performing signal correlation at multiple resolutions to mitigate multipath interference A method and apparatus for mitigating multipath interference in a digital signal correlator forms values representative of magnitude or power of a correlation response between a digital signal and a pseudorandom reference code. The earliest peak in the correlation r... | 02/28/2006 |
| 6982592 | Zero if complex quadrature frequency discriminator and FM demodulator A frequency discriminators (FD) and frequency modulation (FM) demodulators, utilizing single sideband (SSB) complex conversion directly to zero IF, suitable for direct demodulation at high frequencies of analog FM or digital FSK modulated signals, as well as for hig... | 01/03/2006 |
| 6977965 | Phase shift key burst receiver having improved phase resolution and timing and data recovery A receiver includes an I-Q demodulator (135) responsive to the I and Q components carried on a first frequency signal line (132). A demodulator frequency generator (275) generates a demodulating signal to extract the carried I and Q components. ... | 12/20/2005 |
