Patents Examined by Bryan Webst
  • Patent number: 6125137
    Abstract: A base station receiver assembly (400) for performing a signal search, which operates in a coherent code division multiple access (CDMA) wireless communication system conveying a mobile communication signal is disclosed. The assembly (400) includes a multipath signal searcher (200), a receiver (300), and an energy adjustment generator (490). The energy adjustment generator operates to combine an energy metric (241) from the multipath signal searcher (200) with a symbol match count (447) to yield a signal (448) for weighting inputs to a finger manager (260). The symbol match count (447) is based on a count, resulting from a comparison of a number of times an output from the multipath signal searcher (200) matched an output from the receiver (300). The symbol match count (447) is representative of a likelihood that a time offset selected by the finger manager (260) corresponds to a time offset of the mobile communication signal (107).
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: September 26, 2000
    Assignee: Motorola, Inc.
    Inventors: Michael Mao Wang, Tyler Brown
  • Patent number: 6091758
    Abstract: A cordless telephone is arranged for operation in a frequency hopping system includes an arrangement which achieves optimum utilization of multiple cordless telephone portable units by permitting these units to simultaneously access a common base unit. A physical layer of an air interface is provided by a two channel time division multiple access protocol for supporting a two channel multiple access system for the portable units. These two channels are considered as virtual channels and not dedicated to any particular telephone line, as in the case of two line telephone products. Nor are these two channels dedicated to any particular portable unit, but rather they are available for use by any portable unit in the telephone. A signaling layer of the air interface is provided for supporting the two channel multiple access system. Two types of subframes, acquisition and traffic, are illustratively provided in the air interface for the cordless telephone.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: July 18, 2000
    Assignee: Lucent Technologies Inc.
    Inventors: Joseph L. Ciccone, Sanjay Kasturia, David C. Nall, Chu Ng, Jay E. Padgett, Colin A. Warwick
  • Patent number: 5878091
    Abstract: An apparatus and method adaptable to desired offsets for determining an undesired offset of a signal having a maximum and a minimum state that includes: providing a peak and trough estimate of, respectively, the maximum and minimum amplitude state; averaging such estimates to provide a reference level that is proportional to the undesired offset; and controlling the peak and trough estimates whenever a comparison of the signal and the reference level is, respectively, indicative of the maximum and minimum amplitude states to thus assure adaptation to the desired offset of the signal.
    Type: Grant
    Filed: November 27, 1992
    Date of Patent: March 2, 1999
    Assignee: Motorola, Inc.
    Inventor: Michael H. Retzer
  • Patent number: 5793797
    Abstract: An electronic data transmission system has a low peak-to-average power ratio by including a transmitter circuit which receives an input signal and in response generates a distorted output signal. This distorted output signal is generated by amplifying the input signal with one particular gain when the input signal is at a maximum magnitude which gives the distorted output signal a corresponding maximum magnitude, and by amplifying the input signal with a larger gain when the input signal is in a predetermined range below the maximum magnitude. The distorted output signal travels over a communication channel to a receiver circuit, which regenerates the input signal by amplifying the distorted output signal with a gain that is the inverse of the gain by which the distorted signal is generated.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: August 11, 1998
    Assignee: Unisys Corporation
    Inventors: Thomas Robert Giallorenzi, David William Matolak, Johnny Michael Harris, Robert William Steagall, Bruce Howard Williams