1
Elias Nemer
Elias Nemer, Ahmed Said: Method and apparatus for compensating I/Q imbalance in receivers. Intel Corporation, Blakely Sokoloff Taylor & Zafman, October 9, 2007: US07280619 (14 worldwide citation)

A method and apparatus for compensating I/Q imbalance in receivers is described. The method includes determining a difference between energies of two quadratures, correcting an amplitude imbalance using the difference between the energies of two quadratures, determining a cross-correlation between t ...


2
Selim Shlomo Rakib, Yoram Zarai: Method and apparatus of using a bank of filters for excision of narrow band interference signal from CDMA signal. Terayon Communication Systems, Ronald C Fish, Ronald Craig Fish a Law Corporation, July 30, 2002: US06426983 (179 worldwide citation)

A narrow band interference excision circuit for use in broadband digital data communication systems such as CDMA systems. The excision circuit is comprised of a matrix of polyphase filters that divide the input signal into a plurality of narrow subbands. Each narrow subband signal is examined to det ...


3
Gerard Joseph Foschini: Wireless communications system having a layered space-time architecture employing multi-element antennas. Lucent Technologies, August 1, 2000: US06097771 (167 worldwide citation)

The Shannon limit governs the ultimate bit rate at which a digital wireless communications system may communicate data. A digital wireless receiver may be enhanced such that it approaches the Shannon limit by decomposing a n-dimensional system into n-one dimensional systems of equal capacity.


4
Jen Wei Liang, Arogyaswami Paulraj: Two-stage CCI/ISI reduction with space-time processing in TDMA cellular networks. The Board of Trustees of the Leland Stanford Junior University, Lumen Intellectual Property Services, November 6, 2001: US06314147 (144 worldwide citation)

A two-stage, space-time digital receiver provides improved estimates of data symbols from a received signal comprising the data symbols, co-channel interference, and intersymbol interference. The first stage uses a space-time linear filter to process the received signal and provide an intermediate s ...


5
Keith B Hardin, John T Fessler, Donald R Bush, James J Booth: Spread spectrum clock generator and associated method. Lexmark International, Bell Seltzer Park & Gibson, January 30, 1996: US05488627 (116 worldwide citation)

A clock circuit includes an oscillator for generating a reference frequency signal, and a spread spectrum clock generator cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental frequency and reduced amplitude EMI spectral components at harmonics of ...


6
Edwin A Suominen, Charles J Voboril: Receiver with analog and digital channel selectivity. Alcatel Alsthom Compagnie Generale d Electricite, Ware Fressola Van Der Sluys & Adolphson, July 20, 1999: US05926513 (106 worldwide citation)

A radio receiver for receiving radio frequency (RF) signals includes an analog down-converting and filtering section for down-converting and selecting the RF signals to an intermediate passband and a stopband which substantially determine the widest bandwidth of operation of the radio receiver. An a ...


7
Jose Tellado, John M Cioffi: Peak to average power ratio reduction. The Board of Trustees of the Leland Stanford Junior University, Beyer Weaver & Thomas, November 6, 2001: US06314146 (93 worldwide citation)

The present inventions provide methods and systems for reducing the peak to average power ratio of a multi-carrier signal. Reducing the peak to average power ratio of a signal ensures that amplifiers and transmitters are not saturated, causing loss of data. Further, reducing peak to average power ra ...


8
Charles B Fisher, Sidney T Fisher: Synchronous detection with sampling. February 24, 1981: US04253066 (91 worldwide citation)

In receiving apparatus for a double-sideband amplitude-modulated wave, a synchronous detector which samples the modulated wave for short periods centered on instants of peaks of the carrier at regularly-occurring intervals, with a sampling frequency greater than the Nyquist frequency for the modulat ...


9
John F Sutton: Synchronous demodulator. The United States of America represented by the Administrator of the National Aeronautics and Space Administration, R Dennis Marchant, Harold W Adams, Ronald F Sandler, May 14, 1991: US05015963 (89 worldwide citation)

A synchronous demodulator includes a switch which is operated in synchronism with an incoming periodic signal and both divides and applies that signal to two signal channels. The two channels each include a network for computing and holding, for a predetermined length of time, the average signal val ...


10
James L Richards, Vernon R Brethour, Jack Thomas Matheney: Method and system for canceling interference in an impulse radio. Time Domain Corporation, Sterne Kessler Goldstein & Fox P L L C, March 4, 2003: US06529568 (88 worldwide citation)

An impulse radio concurrently receives an impulse signal and interference. An interference sampler samples the interference before an expected time of arrival of an impulse in the impulse signal, to produce an interference nulling sample. Then, when the impulse arrives, a data sampler samples the im ...