Abstract: A quadrature frequency division multiplexing (“OFDM”) wireless receiver, including methods and devices for adaptive quantization of OFDM signals according to modulation and coding schemes and sub-carrier frequency responses, is provided. Efficient quantization may be utilized to reduce the large dynamic range of signals to achieve circuit simplification and chip area reduction. In one embodiment, a quantization circuit includes a quantization selector to select quantization thresholds according to modulation and coding schemes and sub-carrier frequency responses, and a non-uniform quantizer to reduce input dynamic range so that an output is represented by fewer bits than an input.
Type:
Grant
Filed:
May 4, 2006
Date of Patent:
July 13, 2010
Assignee:
Integrated System Solution Corporation
Inventors:
Jeng-Hong Chen, Yumin Lee, Yuh-Chun Lin