| 一种新的双多进制正交扩频调制信号的差分解调算法 |
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| 引用本文： | 张玉明,程云鹏,徐友云.一种新的双多进制正交扩频调制信号的差分解调算法[J].上海交通大学学报,2007,41(5):729-734. |
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| 作者姓名： | 张玉明 程云鹏 徐友云 |
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| 作者单位： | 1. 解放军理工大学,通信工程学院,南京,210007
2. 解放军理工大学,通信工程学院,南京,210007;上海交通大学,电子工程系,上海,200240 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 研究了具有高频谱效率的双多进制正交扩频调制系统,提出了差分解调输出比特信息的后验概率(APP)算法,该算法能使整个系统获得相当的增益.为了降低运算的复杂度给出了简化算法,并讨论了简化算法的优化策略.在加性高斯白噪声(AWGN)和多径Rayleigh衰落信道下进行的仿真结果表明,所提算法是有效的,采用优化的简化算法性能可以进一步逼近APP算法.
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| 关 键 词： | Turbo码 正交码 后验概率算法 |
| 文章编号： | 1006-2467（2007）05-0729-06 |
| 收稿时间： | 2006-06-04 |
| 修稿时间： | 2006年6月4日 |
A New Differential Demodulation Algorithm in Dual N-ary Orthogonal Spread System |
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| ZHANG Yu-ming,CHENG Yun-peng,XU You-yun.A New Differential Demodulation Algorithm in Dual N-ary Orthogonal Spread System[J].Journal of Shanghai Jiaotong University,2007,41(5):729-734. |
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| Authors: | ZHANG Yu-ming CHENG Yun-peng XU You-yun |
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| Abstract: | This paper investigated the system of dual N-ary orthogonal spread spectrum which is bandwidth efficient modulation,and proposed an APP(a posteriori probability) algorithm for computing bit information metric of M-ary differential phase demodulation.The proposed algorithm greatly improves the whole system performance.A simplified APP algorithm was presented in order to decrease the complexity of computing,and the optimal strategy of the simplified algorithm was discussed.The simulation results show that the effectiveness of the proposed algorithm and the performance of the optimal algorithm can approach the APP algorithm. |
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| Keywords: | Turbo code orthogonal code a posteriori probability(APP) algorithm |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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