Patents Examined by Mohammed H. Ghayour
  • Patent number: 7505530
    Abstract: An output signal from an inherently non-linear device is linearized by sampling an original signal with a first sampling rate for a desired signal resolution of an achieved digital original signal message; and re-sampling the original signal at a second sampling rate for creating a digital pre-distortion signal to be added to the achieved digital original signal message. The second sampling rate is greater than the first sampling rate, thereby forming a digital pre-distorted signal to be fed to the inherently non-linear device after digital to analog conversion.
    Type: Grant
    Filed: May 5, 2002
    Date of Patent: March 17, 2009
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Leonard Rexberg, Bernt Johansson
  • Patent number: 7428279
    Abstract: A sliding window based data estimation is performed. An error is introduced in the data estimation due to the communication model modeling the relationship between the transmitted and received signals. To compensate for an error in the estimated data, the data that was estimated in a previous sliding window step or terms that would otherwise be truncated as noise are used. These techniques allow for the data to be truncated prior to further processing reducing the data of the window.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: September 23, 2008
    Assignee: InterDigital Technology Corporation
    Inventors: Rui Yang, Bin Li, Alexander Reznik, Ariela Zeira
  • Patent number: 7421016
    Abstract: Techniques to test a wireless communication link. A traffic channel is tested via a test data service option (TDSO) that may be negotiated and connected similar to other services. Test parameters values may be proposed, accepted or rejected, and negotiated. Test data for a channel is generated based on a defined data pattern or a pseudo-random number generator. Sufficient test data may be generated based on the generator for a test interval, stored to a buffer, and thereafter retrieved from a particular section of the buffer to form data block(s) for each “active” frame. The traffic channel may be tested using discontinuous transmission. A two-state Markov chain determines whether or not to transmit test data for each frame. The average frame activity and average burst length are defined by selecting the probabilities for transitioning between the ON/OFF states of the Markov chain, which may be driven by a second generator.
    Type: Grant
    Filed: January 14, 2003
    Date of Patent: September 2, 2008
    Inventors: Scott Eduard Fischel, Idreas A. Mir
  • Patent number: 7388911
    Abstract: An FM broadcast transmitter transmits a broadcast signal having a carrier at a broadcast frequency and sidebands, able to be transmitted at full power, within a transmission bandwidth around the carrier. It includes a source of a modulated FM stereo signal having a carrier at the broadcast frequency and having sidebands with a bandwidth less than the transmission bandwidth representing a stereo signal. It also includes a source of a modulated in-band-on-channel (IBOC) signal, having carrier pulses spaced relative to each other to represent the IBOC digital data signal encoded as a variable pulse width encoded signal, and a bandwidth within the transmission bandwidth not overlapping the FM stereo signal sidebands. A signal combiner combines the modulated FM stereo signal and the modulated IBOC signal to form the broadcast signal.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: June 17, 2008
    Assignee: Thomson Licensing
    Inventors: Chandra Mohan, Zhiming Zhang, Manuel Apraez
  • Patent number: 6621855
    Abstract: A method allows determination of the presence of, the frequency of, and or the timing of a coded signal distributed in time, as for example a direct-sequence spread-spectrum signal or a signal having a coded header. According to the method, the received signal is correlated (16, 216, 316) with small sections of the spreading or header code, to produce partial correlations, as for example a 1024-chip spreading code is correlated in eight- or sixteen-chip portions. The result of each partial correlation is delayed (32, 232, 332/350) by an amount which results in temporal congruence or simultaneous occurrence of the partial correlations at a Doppler processor. The processor processes the simultaneous partial correlations, to produce signals which recur in the appropriate frequency bin at the recurrence rate of the spreading code. The frequency bin identifies the frequency of the received signals, and the time of the appearance of the signals at the bins is indicative of the time.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: September 16, 2003
    Assignee: Lockhead Martin Corporation
    Inventors: Nick Andrew Van Stralen, Richard August Korkosz, Gary Jude Saulnier, John Erik Hershey, Naofal Mohammed Wassel Al-Dhahir