| 具有自适应干扰抑制措施的直接序列扩谱通信接收系统 |
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| 引用本文： | 何培宇,王永德.具有自适应干扰抑制措施的直接序列扩谱通信接收系统[J].四川大学学报(自然科学版),1990,27(4):436-443. |
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| 作者姓名： | 何培宇 王永德 |
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| 作者单位： | 四川大学无线电电子学系
(何培宇)，四川大学无线电电子学系(王永德) |
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| 摘 要： | 采用专用数字信号处理器TMS32010实现了具有自适应干扰抑制措施的直接序列扩谱通信接收系统,并就干扰抑制的三种方案比较它们在定点运算的有限字长实现中的性能,从理论上研究了在有限字长实现中提高性能的基本方法.测试结果表明,双精度编程方案的参数特性与无限精度的理论分析结果基本一致;单精度编程方案的参数特性与有限精度的理论分析结果基本一致.双精度或单精度编程,其自适应最佳滤波器方案的单频干扰抑制性能,均优于其它两种方案.
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| 关 键 词： | 扩谱通信系统 干扰抑制 滤波器 |
A TMS32010 BASED DS SPREAD SPECTRUM COMMUNICATION RECEIVING SYSTEM WITH ADAPTIVE INTERFERENCE REJECTION |
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| He Peiyu Wang Yongde.A TMS32010 BASED DS SPREAD SPECTRUM COMMUNICATION RECEIVING SYSTEM WITH ADAPTIVE INTERFERENCE REJECTION[J].Journal of Sichuan University (Natural Science Edition),1990,27(4):436-443. |
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| Authors: | He Peiyu Wang Yongde |
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| Institution: | Dept. of Radio Electronics |
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| Abstract: | In this paper, a DS spread-spectrum communication receiving system with adaptive interference rejection is implemented with a TMS32010 signal processor. The performances of three interference rejection schemes are compared based on the fixed-point finite word length operation and the fundamental method for improving the performance of each scheme is studied theoretically. Testing results show that the parameter properties of double precision programming scheme are basically identical with those of theoretical analysis of infinite precision, and those of single precision programming scheme are basically identical with the results of theoretical analysis in finite precision. It is shown that the tone jamming rejection performance of the adaptive optimal filter scheme is superior to those of other two schemes, whichever precision is used. |
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| Keywords: | spread spectrum communication adaptive interference rejection double precision single precision |
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