| 基于自适应子波网络的多用户检测 |
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| 引用本文： | 焦李成,丁志刚. 基于自适应子波网络的多用户检测[J]. 电子学报, 2002, 30(1): 5-8 |
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| 作者姓名： | 焦李成 丁志刚 |
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| 作者单位： | 西安电子科技大学雷达信号重点实验室,陕西西安 710071 |
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| 基金项目： | 国家“8 63”计划资助项目 (No.863 31 7 0 3 0 5 99) |
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| 摘 要： | 本文将子波网络用于实现DS-CDMA系统信道中多用户的信号检测.在实际中,当存在强干扰信号时传统检测器(单用户匹配滤波器)的性能会急剧恶化.本文基于MMSE(Minimum Mean-Square Error)线性检测器原理,利用自适应子波网络实现最小均方误差准则的优化,较好地消除了多址干扰.仿真结果表明,基于子波网络的多用户检测器可以快速收敛,并具有抗远近性.
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| 关 键 词： | DS-CDMA系统 多址干扰 多用户检测 子波变换 子波网络 |
| 文章编号： | 0372-2112(2002)01-0005-04 |
| 收稿时间： | 2000-08-01 |
| 修稿时间： | 2000-08-01 |
Multi-User Detection Based on Adaptive Wavelet Networks |
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| JIAO Li cheng,DING Zhi gang. Multi-User Detection Based on Adaptive Wavelet Networks[J]. Acta Electronica Sinica, 2002, 30(1): 5-8 |
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| Authors: | JIAO Li cheng DING Zhi gang |
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| Affiliation: | Key Lab.of Radar Signal Processing Xidian University,Xi'an,Shaanxi 710071,China |
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| Abstract: | In this paper,we employ wavelet networks for demodulation of DS CDMA(direct sequence code disivion multiple access) signals in a multi access environment.In practice,conventional detector (single user matched filter) suffers severe performance degradation as the relative powers of interfering signals become large.On the basis of MMSE(Minimum Mean Square Error) linear detector we use adaptive wavelet network to achieve minimum mean square error,and effectively eliminate multi access interference.Simulations show the detector based on wavelet networks can converge rapidly and is near far resistant. |
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| Keywords: | DS CDMA system multiple access interference multi user detection wavelet transform wavelet network |
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