Invention Grant
US08473822B2 True bit level decoding of TTCM (turbo trellis coded modulation) of variable rates and signal constellations
有权
真正的比特级解码TTCM(turbo网格编码调制)的可变速率和信号星座
- Patent Title: True bit level decoding of TTCM (turbo trellis coded modulation) of variable rates and signal constellations
- Patent Title (中): 真正的比特级解码TTCM(turbo网格编码调制)的可变速率和信号星座
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Application No.: US12627438Application Date: 2009-11-30
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Publication No.: US08473822B2Publication Date: 2013-06-25
- Inventor: Ba-Zhong Shen , Kelly Brian Cameron , Hau Thien Tran
- Applicant: Ba-Zhong Shen , Kelly Brian Cameron , Hau Thien Tran
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Garlick & Markison
- Agent Shayne X. Short
- Main IPC: H03M13/45
- IPC: H03M13/45

Abstract:
True bit level decoding of TTCM (Turbo Trellis Coded Modulation) of variable rates and signal constellations. A decoding approach is presented that allows for decoding on a bit level basis that allows for discrimination of the individual bits of a symbol. Whereas prior art approaches typically perform decoding on a symbol level basis, this decoding approach allows for an improved approach in which the hard decisions/best estimates may be made individually for each of the individual bits of an information symbol. In addition, the decoding approach allows for a reduction in the total number of calculations that need to be performed as well as the total number of values that need to be stored during the iterative decoding. The bit level decoding approach is also able to decode a signal whose code rate and/or signal constellation type (and mapping) may vary on a symbol by symbol basis.
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