一种新型的平衰落信道turbo迭代OFDM接收机

International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003 Pub Date : 1900-01-01 DOI:10.1109/ICNNSP.2003.1281175

Ma Zhangyong, Liu Yaran, Zhao Chunming, Y. Xiaohu

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引用次数: 3

摘要

对于qpsk调制的OFDM系统，结合外部软进/软出(SISO)信道解码器，可以通过迭代信道估计和Turbo解码进一步提高性能。但是，为了避免在信噪比较低时误差传播严重，提出了加权迭代估计算法。仿真结果表明，与传统方案相比，该算法显著提高了系统性能。

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A novel turbo iterative OFDM receiver in the flat-fading channel

For QPSK-modulated OFDM system, the combination with an outer soft in/soft out (SISO) channel decoder allows to further improve the performance by means of iterative channel estimation and Turbo decoding. However, in order to avoid serious error propagation when the SNR (signal to noise ratio) is low, the weighted iterative estimation algorithm is proposed. The simulation results show that the proposed algorithm improves the system performance dramatically compared with the conventional scheme.

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International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003

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