標題: MLP/BP-based soft decision feedback equalization with bit-interleaved TCM for wireless applications
作者: Hsu, Terng-Ren
Lin, Chien-Ching
Hsu, Terng-Yin
Lee, Chen-Yi
資訊工程學系
電子工程學系及電子研究所
Department of Computer Science
Department of Electronics Engineering and Institute of Electronics
關鍵字: decision-feedback equalizer (DFE);intersymbol interference (ISI);multi-layered perceptron neural network with backpropagation algorithm (MLP/BP);multi-path fading channel;and trellis coded modulation (TCM)
公開日期: 1-Apr-2007
摘要: For more efficient data transmissions, a new MLP/BP-based channel equalizer is proposed to compensate for multi-path fading in wireless applications. In this work, for better system performance, we apply the soft output and the soft feedback structure as well as the soft decision channel decoding. Moreover, to improve packet error rate (PER) and bit error rate (BER), we search for the optimal scaling factor of the transfer function in the output layer of the MLP/BP neural networks and add small random disturbances to the training data. As compared with the conventional MLP/BP-based DFEs and the soft output MLP/BP-based DFEs, the proposed MLP/BP-based soft DFEs under multi-path fading channels can improve over 3-0.6 dB at PER=10(-1) and over 3.3-0.8 dB at BER=10(-3).
URI: http://dx.doi.org/10.1093/ietfec/e90-a.4.879
http://hdl.handle.net/11536/10987
ISSN: 0916-8508
DOI: 10.1093/ietfec/e90-a.4.879
期刊: IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES
Volume: E90A
Issue: 4
起始頁: 879
結束頁: 884
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