[1]刘云,郭洁,叶芝慧,等.频谱重叠信号分离的循环平稳算法[J].东南大学学报(自然科学版),2005,35(3):333-337.[doi:10.3969/j.issn.1001-0505.2005.03.003]
　Liu Yun,Guo Jie,Ye Zhihui,et al.Separating cyclostationary signals from spectrally overlapping interference[J].Journal of Southeast University (Natural Science Edition),2005,35(3):333-337.[doi:10.3969/j.issn.1001-0505.2005.03.003]
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频谱重叠信号分离的循环平稳算法()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第3期
页码:
333-337
栏目:
信息与通信工程
出版日期:
2005-05-20

文章信息/Info

Title:
Separating cyclostationary signals from spectrally overlapping interference
作者:
刘云;  郭洁;  叶芝慧;  宋铁成;  沈连丰
东南大学移动通信国家重点实验室, 南京 210096
Author(s):
Liu Yun;  Guo Jie;  Ye Zhihui;  Song Tiecheng;  Shen Lianfeng
National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China
关键词:
循环平稳;  频移滤波器;  重叠信号;  谱相关
Keywords:
cyclostationary;  frequency-shift filter;  overlap signal;  spectrum correlation
分类号:
TN911.7
DOI:
10.3969/j.issn.1001-0505.2005.03.003
摘要:
利用信号的循环平稳性研究了分离频谱重叠信号的算法,并以直接序列扩频系统为例进行了性能分析.该算法在接收端设置了频移滤波器,以便同时利用信号的时间相关性及频谱相关性来实现信号的分离.通过对循环平稳性和频谱相关性的分析,得出了频移滤波器的结构并采用自适应算法确定多个频移分量的最优权值.仿真结果表明,该算法可有效分离频谱重叠信号,在大干扰功率时,误码率与时域滤波器和简单直扩系统比较均低约2个数量级.
Abstract:
An algorithm about separating overlapping signals using the cyclostationary of signals is studied. On the basis of direct sequence spread system, frequency-shift filter is added into the receiver of communication system. Although the structure of frequency-shift filter is more complicated than the time-domain filter, it uses both time correlations and frequency spectrum correlations so it can achieve better performances for separating the overlapping signals. From the analysis of cyclostationary and frequency spectrum correlation, the structure of frequency-shift filter can be gotten. Then the self-adapting algorithm will achieve optimum weighted coefficients of multidimensional frequency-shift components. Simulation results indicate that this algorithm can efficiently separate overlapping signals, and its error rate is lower than time-domain filter and direct sequence spread spectrum(DSSS)by two orders of magnitude when high-power interference is added into the system.

参考文献/References:

[1] Gardner W A.Cyclic Wiener filtering:theory and method [J]. IEEE Transactions on Communications,1993,41(1):151-163.
[2] Gelli Giacinto,Paura Luigi,Tulino Antonia Maria.Cyclostationarity-based filtering for narrowband interference suppression in direct-sequence spread-spectrum systems [J].IEEE Journal on Selected Areas in Communications,1998,16(9):1747-1755.
[3] Wang J.On the use of a suppression filter for CDMA overlay [J].IEEE Transactions on Vehicle Technology,1999,48(2):405-414.
[4] Glentis G O,Berberidis K,Theodoridis S.Efficient least squares adaptive algorithms for FIR transversal filtering [J].IEEE Signal Processing Magazine,1999,16(4):13-41.
[5] Doherty J,Porayath R.Robust echo canceller for acoustic environments [J].IEEE Transactions on Circuits and Systems, 1997, 44(5):389-396.
[6] Gardner W A.On the spectral coherence of nonstationary processes [J].IEEE Transactions on Signal Processing,1991,39(2):424-430.
[7] Zhang J,Wong K M,Luo Z Q,et al.Blind adaptive FRESH filtering for signal extraction [J].IEEE Transactions on Signal Processing, 1999,47(5):1397-1402.
[8] 杨巧莲.直扩通信中的干扰抑制技术 [D].成都:电子科技大学通信与信息工程学院,2001.
[9] Zhang J,Wong K M.A new kind of adaptive frequency shift filter [A].In:Proceedings of IEEE International Conference on Acoustics,Speech and Signal Processing [C].Detroit,MI,1995,2:913-916.
[10] Reed J H,Hsia T C.The performance of time-dependent adaptive filters for interference rejection [J]. IEEE Transactions on Acoustics,Speech and Signal Processing,1990,38(8):1373-1385.
[11] Reed J H,Greene C D,Hsia T C.Demodulation of a direct sequence spread-spectrum signal using an optimal time-dependent receiver [A].In:Proceedings of IEEE Military Communications Conference [C].Boston,MA,1989.657-662.
[12] Pickholtz R L,Milstein L B,Schilling D L.Spread spectrum for mobile communications [J].IEEE Transactions on Vehicle Technology, 1991, 40(2):313-322.
[13] Laster J D,Reed J H.Interference rejection in digital wireless communications [J]. IEEE Signal Processing Magazine, 1997,14(3):37-62.
[14] Milstein L B.Interference rejection techniques in spread spectrum communications [J].Proceedings of the IEEE,1988,76(6):657-671.
[15] 张贤达,保铮.现代信号处理 [M].北京:国防工业出版社,2000.

相似文献/References:

[1]魏安全,沈连丰,宋铁成.基于FRESH滤波器的DSSS系统窄带干扰抑制技术[J].东南大学学报(自然科学版),2009,39(3):419.[doi:10.3969/j.issn.1001-0505.2009.03.001]
　Wei Anquan,Shen Lianfeng,Song Tiecheng.NBI suppression technique of DSSS systems based on FRESH filter[J].Journal of Southeast University (Natural Science Edition),2009,39(3):419.[doi:10.3969/j.issn.1001-0505.2009.03.001]

备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(60472053)、江苏省自然科学基金资助项目(BK2003055)、高等学校博士学科点专项科研基金资助项目(20030286017)、教育部科学技术研究重点资助项目(02171).
作者简介: 刘云(1974—),女,博士; 沈连丰(联系人),男,教授,博士生导师,lfshen@seu.edu.cn.
更新日期/Last Update: 2005-05-20