发明名称 |
Variable code rate and signal constellation turbo trellis coded modulation codec |
摘要 |
Variable code rate and signal constellation turbo trellis coded modulation (TTCM) codec. A common trellis is employed at both ends of a communication system (in an encoder and decoder) to code and decode data at different rates. The encoding employs a single TTCM encoder whose output bits may be selectively punctured to support multiple modulations (constellations and mappings) according to a rate control sequence. A single TTCM decoder is operable to decode each of the various rates at which the data is encoded by the TTCM encoder. The rate control sequence may include a number of rate controls arranged in a period that is repeated during encoding and decoding. Either one or both of the encoder and decoder may adaptively select a new rate control sequence based on operating conditions of the communication system, such as a change in signal to noise ratio (SNR).
|
申请公布号 |
US2007016841(A1) |
申请公布日期 |
2007.01.18 |
申请号 |
US20060491729 |
申请日期 |
2006.07.24 |
申请人 |
BROADCOM CORPORATION |
发明人 |
CAMERON KELLY B.;SHEN BA-ZHONG;TRAN HAU T. |
分类号 |
H03M13/00;G11B20/18;H03M13/25;H03M13/29;H03M13/41;H03M13/45;H04L1/00 |
主分类号 |
H03M13/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|