With An Adaptive Quantizer Characteristic, E.g., Controlled By Forward Or Backward Adaptation (epo) Patents (Class 375/E7.245)
  • Wireless communication device and quantization method
    Patent number: 8654900
    Abstract: Provided is a wireless communication device which can improve the notification accuracy of the channel state information (CSI) without straining the feedback circuit. In this device, a channel estimator (105) uses a pilot signal input from a wireless receiver (102) to estimate the channel and obtain a plurality of path gains in each of a plurality of delay periods. Then, the channel estimator (105) outputs the plurality of path gains to a quantizer (107). The quantizer (107) quantizes the plurality of path gains in the number of notification bits corresponding to each of the plurality of delay periods based on the correspondence of the delay period and the number of notification bits input from a setting unit (106).
    Type: Grant
    Filed: April 24, 2009
    Date of Patent: February 18, 2014
    Assignee: Panasonic Corporation
    Inventors: Shinsuke Takaoka, Katsuhiko Hiramatsu, Akihiko Nishio, Ryohei Kimura, Yoshiko Saito, Megumi Ichikawa
  • Video quantizer unit and method thereof
    Patent number: 8345746
    Abstract: A quantizer and method are disclosed.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: January 1, 2013
    Assignee: Smith Micro Software, Inc.
    Inventor: Brainerd Sathianathan