A fast-convergence MIMO-BICM scheme

• Main Authors: Jun-Yu Lin, 林俊宇
• Other Authors: Yeong-Luh Ueng
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/23253890944101802528

碩士 === 國立清華大學 === 電機工程學系 === 96 === MIMO-BICM(Multi-input multi-output bit interleaved coded modulation) systems have been investigated prosperously in wireless communications. In this thesis, we propose a fast-convergence MIMO-BICM scheme with the EM (expectation-maximization) based channel estimation by designing the bit interleaver and the iterative decoding-detection-estimation algorithm. Since the specific structure of the proposed interleaver, the softoutput of the decoder can be fed back to the MMSE-SC (minimum mean square error with soft cancelation) detector and the estimator after a window length and then the detector and the channel estimator can immediately use these soft values within the same iteration. Hence, the proposed MIMOBICM scheme can achieve a faster speed of convergence as compared to the conventional MIMO-BICM scheme.