| 一种改进的四阶累积量波束形成算法 |
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| 引用本文： | 黄蕾,张曙. 一种改进的四阶累积量波束形成算法[J]. 系统工程与电子技术, 2008, 30(12) |
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| 作者姓名： | 黄蕾 张曙 |
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| 作者单位： | 1. 哈尔滨工程大学信息与通信工程学院,黑龙江,哈尔滨,150001;华东电子工程研究所,安徽,合肥,230031
2. 哈尔滨工程大学信息与通信工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 波束形成算法需要使用训练序列,或需要预先掌握期望信号的DOA信息,并且在多径环境中工作性能急剧下降。基于四阶累积量的CUM2算法在理论上可以收集期望信号的各多径干扰并使系统输出信干噪比达到最大,但对于四阶累积量的估计误差使得CUM2抑制干扰信号的性能受到了较大的影响。提出将四阶累积量矩阵进行Toeplitz预处理的思想,进而得到了一种改进算法。仿真试验也证明在同等条件下,改进算法与CUM2相比有着更强的干扰抑制性能。
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| 关 键 词： | 波束形成 智能天线 期望信号 多径 累积量 |
New beamforming algorithm based On the fourth order cumulant |
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| HUANG Lei,ZHANG Shu. New beamforming algorithm based On the fourth order cumulant[J]. System Engineering and Electronics, 2008, 30(12) |
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| Authors: | HUANG Lei ZHANG Shu |
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| Affiliation: | HUANG Lei1,2,ZHANG Shu1 |
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| Abstract: | Beamforming is one chief technique of smart antennas and there were a lot of appliable algorithms for it.These algorithms work bad unless using training sequences or the DOA information of the signal of interest(SOI),and their performance descends rapidly in the environment of multipath.To solve the problem,a CUM2 algorithm based on the fourth order cumulant was proposed by the proper researcher.Although CUM2 can make the output SINR of the system maximum for collecting the multipath interference of SOI in theory,the biased estimate of FOC has a great effect on the performance of CUM2.In the paper an idea of Toeplitz preprocessing is proposed,thus a modified algorithm is obtained.Computer simulations show that the modified algorithm was more powerful to fight against interference than CUM2. |
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| Keywords: | beamforming smart antenna the signal of interest multipath cumulant |
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