| 基于自适应变步长盲平均Sign算法的干扰抑制 |
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| 引用本文： | 赵海波,许光辉,单红梅.基于自适应变步长盲平均Sign算法的干扰抑制[J].上海交通大学学报,2005,39(9):1548-1551. |
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| 作者姓名： | 赵海波 许光辉 单红梅 |
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| 作者单位： | 上海交通大学,电子工程系,上海,200030 |
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| 基金项目： | 国家自然科学基金资助项目（60172018）. |
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| 摘 要： | 提出了一种适用于直接序列码分多址（DS／CDMA）系统中抑制多址干扰（MAI）和窄带干扰（NBI）的变步长盲平均Sign算法（AS-asign）。该算法把盲平均Sign算法和变步长思想结合起来，对盲平均Sign算法的步长采用二次最小均方（LMS），克服了盲平均Sign算法受步长影响的缺点，并使计算复杂度降低。仿真结果表明，AS-asign算法能够自动迅速地适应环境的变化，抑制多径干扰和窄带干扰，并且稳态时的信扰比高于AS-LMS算法。
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| 关 键 词： | 码分多址 盲平均Sign算法 干扰抑制 |
| 文章编号： | 1006-2467(2005)09-1548-04 |
| 收稿时间： | 2004-07-26 |
| 修稿时间： | 2004年7月26日 |
The Adaptive Step-Size Averaging Blind Sign Algorithm for Interference Suppression |
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| ZHAO Hai-bo,XU Guang-hui,SHAN Hong-mei.The Adaptive Step-Size Averaging Blind Sign Algorithm for Interference Suppression[J].Journal of Shanghai Jiaotong University,2005,39(9):1548-1551. |
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| Authors: | ZHAO Hai-bo XU Guang-hui SHAN Hong-mei |
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| Institution: | Dept. of Electronic Eng., Shanghai Jiaotong Univ. , Shanghai 200030, China |
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| Abstract: | This paper presented a blind adaptive step-size averaging blind Sign algorithm (AS-asign) for supperssion of multiple-access interference (MAI) and narrowband interference (NBI) in direct-(sequence)/ code-division multiple-access (DS/CDMA) systems. It combines the Sign-(regressor) algorithm and the concept of variable step-size, uses a second LMS algorithm for the step size of blind averaging Sign- regressor algorithm. The new algorithm overcomes the problems of the effect of fixed step-size to the SIR and (reduces) the complexity of calculation. The simulations indicate that this algorithm can adapts the changes of the environment and suppress multiple access interference and narrowband interference, and the stability is superior to that of AS-LMS. |
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| Keywords: | code-division multiple-access(CDMA) blind averaging Sign algorithm interference suppression |
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