| 基于多模的符号递归常数模算法研究与仿真 |
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| 引用本文： | 张艳萍,郭业才,李涛.基于多模的符号递归常数模算法研究与仿真[J].舰船科学技术,2009,31(3). |
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| 作者姓名： | 张艳萍 郭业才 李涛 |
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| 作者单位： | 南京信息工程大学,电子与信息工程学院,江苏,南京,210044 |
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| 基金项目： | 江苏省高校自然科学基础研究项目，南京信息工程大学校科研基金 |
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| 摘 要： | 针对符号递归常数模算法(SR-CMA)稳定性差、剩余误差大的缺点,提出了一种适用于正交幅度调制(QAM)信号的双模式盲均衡算法.该算法在初始模式中采用运算量较小的SR-CMA算法进行均衡,利用判决圆环对均衡器输出信号进行判决,当误码率降到足够低的水平时自动切换到多模算法,以进一步降低均方误差.利用水声信道模型进行仿真,结果表明,该算法性能稳定,计算量小,稳态剩余误差低于CMA和SR-CMA算法.该算法能够有效降低高速水声通信的误码率,提高水声信道均衡的稳定性.
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| 关 键 词： | 水声信道 盲均衡 常数模 符号递归 多模 |
Research and simulation on signed-regressor constant modulus algorithm based on multi-modulus algorithm |
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| ZHANG Yan-ping,GUO Ye-cai,LI Tao.Research and simulation on signed-regressor constant modulus algorithm based on multi-modulus algorithm[J].Ship Science and Technology,2009,31(3). |
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| Authors: | ZHANG Yan-ping GUO Ye-cai LI Tao |
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| Institution: | Nanjing University of Information Science & Technology;Nanjing 210044;China |
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| Abstract: | A dual-mode algorithm suitable for QAM signals is presented to compensate the unsteadiness and larger residual MSE of the SR-CMA.The proposed algorithm combines the SR-CMA and multi-modulus,and the switch process between SR-CMA and multi-modulus is realized by decision circle ring once the error level is reasonably low.Simulation tests are conducted using underwater acoustic channel model.The results prove that the proposed algorithm has higher robustness and lower residual MSE than CMA and SR-CMA.The propo... |
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| Keywords: | underwater acoustic channel blind equalization constant modulus signed-regressor multi-modulus |
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