发明名称 |
ITERATIVE DETECTION AND DECODING FOR A MIMO-OFDM SYSTEM |
摘要 |
Techniques to iteratively detect and decode data transmitted in a wireless (e.g., MIMO-OFDM) communication system. The iterative detection and decoding is performed by iteratively passing soft (multi-bit) "a priori" information between a detector and a decoder. The detector receives modulation symbols, performs a detection function that is complementary to the symbol mapping performed at the transmitter, and provides soft-decision symbols for transmitted coded bits. "Extrinsic information" in the soft-decision symbols is then decoded by the decoder to provide its extrinsic information, which comprisesthe a priori information used by the detector in the detection process. The detection and decoding may be iterated a number of times. The soft-decision symbols and the a priori information may be represented using log-likelihood ratios (LLRs). Techniques are provided to reduce the computational complexity associated with deriving the LLRs, including interference nulling to isolate each transmitted signal and "dual-maxima" approximation. |
申请公布号 |
WO03049397(A2) |
申请公布日期 |
2003.06.12 |
申请号 |
WO2002US35175 |
申请日期 |
2002.10.31 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
BJERKE, BJORN A.;KETCHUM, JOHN W.;WALTON, JAY R. |
分类号 |
H04J99/00;H04L1/00;H04L1/06;H04L27/26 |
主分类号 |
H04J99/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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