Adaptive quantization method and apparatus for an OFDM receiver
US7756222B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2006 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Feb 14, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/0008
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.