| 编码32DAPSK信号的解调新方法 |
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| 引用本文： | 秦雅娟,刘元安.编码32DAPSK信号的解调新方法[J].北京邮电大学学报,2004,27(Z2):94-97. |
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| 作者姓名： | 秦雅娟 刘元安 |
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| 作者单位： | 北京邮电大学,电信工程学院,北京,100876 |
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| 基金项目： | 国家高技术研究发展计划(863计划);2001AA121031; |
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| 摘 要： | 基于子载波采用32DAPSK调制的OFDM系统,提出了编码32DAPSK信号的一种新的解调方法.仿真结果表明,信道编码采用速率为3/4的punctured卷积码时,在AWGN、平坦Rayleigh衰落和多径Rayleigh衰落信道下,与常规的32DAPSK信号解调方法相比,当比特差错率为10-4时,提出的新方法可使系统的误码性能改善约2dB.新方法也适用于采用其它信道编码的32DAPSK调制系统.
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| 关 键 词： | 正交频分复用 数字调制 差分幅度相位调制 |
| 文章编号： | 1007-5321(2004)增-0094-04 |
| 修稿时间： | 2003年4月7日 |
A Novel Demodulation Method for Coded 32DAPSK Signals |
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| QIN Ya-juan,LIU Yuan-an.A Novel Demodulation Method for Coded 32DAPSK Signals[J].Journal of Beijing University of Posts and Telecommunications,2004,27(Z2):94-97. |
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| Authors: | QIN Ya-juan LIU Yuan-an |
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| Abstract: | An OFDM system with 32DAPSK modulation for each subcarrier is considered. A novel demodulation scheme for coded 32DAPSK signals is proposed. The simulation results show that about 2 dB performance gain can be achieved at a bit-error rate of 10~(-4) on AWGN, flat Rayleigh fading channel and multipath Rayleigh fading channel with forward error correct coding (rate 3/4 punctured convolutional coding) compared with conventional demodulation method. It can be concluded that the method can be applied to other 32DAPSK modulation systems with channel coding. |
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| Keywords: | orthogonal frequency division multiplexing digital modulation differential amplitude and phase shift keying |
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