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一种适用于异步DS-CDMA系统的低复杂度DOA估计算法 被引量：1

A Low-Complexity DOA Estimation Algorithm for Asynchronous DS-CDMA Systems
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摘要 针对异步DS—CDMA系统的多用户环境,该文提出了一种低复杂度的DOA估计算法。该算法首先去除多址干扰及噪声项的影响,并构造出一组包含有感兴趣信息的相关阵;然后采用传统的MUSIC算法即可从这些矩阵中准确地估计出各DOA信息。算法具有计算量小,估计精度高等优点。仿真实验验证了算法的有效性。 In this paper, a low-complexity DOA estimation algorithm is presented for asynchronous DS-CDMA systems with multipath propagation. First, the influence of multiacess interferences and noise is eliminated. Then, a group of correlation matrices constituted by the interested DOA's is derived. Finally, according to the conventional MUSIC algorithm, DOA's are resolved preciously from the above matrices. The algorithm has the advantages of low computation burden and high resolution. Simulation results confirm the effectiveness of the algorithm.
作者 王维新 吴镇扬 彭岳星 刘陈
机构地区 东南大学无线电工程系
出处 《电子与信息学报》 EI CSCD 北大核心 2004年第7期1030-1037,共8页 Journal of Electronics & Information Technology
基金 国家863计划资助项目(项目号:2001AA123015)
关键词 波达方向估计 智能天线 空时信号处理 Direction Of Arrival (DOA), Smart antenna, Space-time processing
分类号 TN911.23 [电子电信—通信与信息系统]
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参考文献8

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  • 2Blanz J J, et al.. Smart antennas for combined DOA and joint channel estimation in time-slotted CDMA mobile radio systems with joint detection. IEEE Trans. on Veh. Tech., 2000, 49(3):293-306.
  • 3Lei Zhongding, Lim T J. Estimation of directions of arrival of multipath signal in CDMA systems.IEEE Trans. on Comm., 2000, 48(6): 1022-1028.
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同被引文献10

  • 1王维新,吴镇扬,彭岳星,刘陈.异步DS-CDMA系统中基于矩阵点除算法的DOA估计[J].信号处理,2004,20(5):470-474. 被引量：1
  • 2Mati Wax and Amir Leshem, "Joint estimation of time delays and direction of arrival of multiple reflections of a known signal,"IEEE trans. Signal Proc., vol.45, no.10,pp.2477-2484, Oct. 1997.
  • 3M.C.Vanderveen, et al., "Joint angle and delay estimation (JADE) for signals in multipath environments,"Conf.on Signals, Syst. and Computers, vol.2, pp.1250-1254,Nov. 1996.
  • 4Kun Wang and Hongya Ge, "Joint estimation of time delays and DOA's for DS-CDMA system over multipathray leigh fading channels,"IEEE Intl. Conf. on Comm.,vol.5, pp.1436-1440, Jun 2001.
  • 5Zhenghui. Gu, et al., "Joint spatiotemporal parameter estimation for DS-CDMA system in fast fading multipath channel,"Vehicular Tech. Conf., vol.l, pp.28-32,May 2001.
  • 6Yung-Fang Chen and M.D.Zoltowski, "Joint angle and delay estimation for DS-CDMA with application to reduced dimension space-time RAKE receivers,"IEEE 5th Intl. Symp. on Spread Spectrum Tech. and App., vol.2,pp.2606-2610, Sept. 1998.
  • 7A.ENaguib and A.Paulraj, "Recursive adaptive beamforming for wireless CDMA,"IEEE Intl. Conf. on 'Gateway to Globalization', vol.3, pp. 1515-1519, Seattle,June 1995.
  • 8Zhongding Lei and T.J.Lim, "Estimation of directions of arrival of multipath signal in CDMA systems,"IEEE Trans. Comm., vol.48, no.6, pp. 1022-1028, June 2000.
  • 9H.Liu and M.D.Zoltowski, "Blind equalization in antenna array CDMA systems, "IEEE Trans. Signal Proc., vol.45,no.l, pp.161-171, Jan.1997.
  • 10C.Sengupta, et. al., "On multipath channel estimation for CDMA systems using multiple sensors,"IEEE Trans.Comm., vol.49, no.3, pp.543-553, Mar.2001.

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电子与信息学报
2004年 第7期

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