协作多小区正交频分复用系统联合信道估计扩展算法

doi:10.3724/SP.J.1087.2013.01225

计算机应用 ›› 2013, Vol. 33 ›› Issue (05): 1225-1229.DOI: 10.3724/SP.J.1087.2013.01225

协作多小区正交频分复用系统联合信道估计扩展算法

陈亦鲜¹,王渊²

1. 西南民族大学电气信息工程学院,成都 610041
2. 通信抗干扰技术国家级重点实验室(电子科技大学),成都 611731

收稿日期:2012-12-03 修回日期:2013-01-18 出版日期:2013-05-01 发布日期:2013-05-08
通讯作者: 陈亦鲜
作者简介:陈亦鲜(1976-)，男，四川乐山人，实验师,硕士，主要研究方向：无线通信网络、计算机网络；王渊(1977-)，男，甘肃天水人，博士研究生，主要研究方向：无线通信系统同步技术。
基金资助:
西南民族大学中央高校基本科研业务费专项资金资助项目(10NZYZJ08)

Extended joint channel estimation in cooperative multi-cell OFDM systems

CHEN Yixian¹,WANG Yuan²

1. College of Electrical and Information Engineering, Southwest University for Nationalities, Chengdu Sichuan 610041, China
2. National Key Laboratory of Science and Technology on Communications (University of Electronic Science and Technology of China),Chengdu Sichuan 611731, China

Received:2012-12-03 Revised:2013-01-18 Online:2013-05-08 Published:2013-05-01
Contact: CHEN Yixian

摘要/Abstract

摘要： 多小区联合信道估计(MC-JCE)是多小区协作联合处理技术实用化的基础，然而现有MC-JCE算法需满足各小区信道功率延迟谱(PDP)相同且已知的条件。针对这一不足基于协作多小区正交频分复(OFDM)系统框架首先探讨在多小区信道PDP存在差异但已知条件下多小区联合信道估计的扩展算法(MC-eJCE)，进而提出未知该信息条件下多小区联合信道估计的修正算法(MC-mJCE)，同时为降低算法运算复杂度并获得信道估计最小的均方误差(MSE)。采用梳状导频最优导频设计，推导了以上MC-JCE算法的克拉美罗界(CRB)。仿真显示在多小区信道PDP存在差异条件下所提MC-eJCE和MC-mJCE算法都具有良好MSE性能，而基于以上算法信道估计的空频块码(SFBC)协作联合传输也具有良好误码率(BER)性能。

关键词: 协作多小区, 联合信道估计, 扩展算法, Cramer-Rao界

Abstract: Multi-Cell Joint Channel Estimation (MC-JCE) is the practical basis of community collaboration and joint processing technology; however, the MC-JCE needs Power Delay Profile (PDP) knowledge of all channels remains the same and gets known. To solve this problem, based on the cooperative community Orthogonal Frequency Division Multiplexing (OFDM) system framework, this article first explored in the extended multi-cell joint channel estimation (MC-eJCE) algorithm of multi-cell channel PDP differences but known conditions, and then put forward modified multi-cell joint channel estimation (MC-mJCE) algorithm under the condition of this information unknown, at the same time to reduce the computational complexity of algorithm and get minimum Mean Square Error (MSE) of channel estimation. This article used optimal pilot set design of comb pilot to finally derive Cramer-Rao bound of MC-JCE algorithm. The simulation shows the MC-eJCE and MC-mJCE algorithms have good performance of MSE under the conditions of multi-cell channel PDP differences, and Space-Frequency Block Code (SFBC) encoding for joint transmission also has a good performance of Bit Errer Rate (BER) based on the above algorithm for channel estimation.

Key words: cooperative multi-cell, joint channel estimation, extensive algorithm, Cramer-Rao bound

中图分类号:

陈亦鲜王渊. 协作多小区正交频分复用系统联合信道估计扩展算法[J]. 计算机应用, 2013, 33(05): 1225-1229.

CHEN Yixian WANG Yuan. Extended joint channel estimation in cooperative multi-cell OFDM systems[J]. Journal of Computer Applications, 2013, 33(05): 1225-1229.

参考文献

［1］GESBERT D, HANLY S, HUANG H, et al. Multi-cell MIMO cooperative networks: A new look at interference［J］. IEEE Journal on Selected Areas in Communications, 2010, 28(9): 1380-1408.

［2］IRMER R, DROSTE H, MARSCH P, et al. Coordinated multipoint: Concepts, performance, and field trial results［J］. IEEE Communications Magazine, 2011, 49(2): 102-111.

［3］LI Y, SOLLENBERGER N R. Adaptive antenna arrays for OFDM systems with cochannel interference［J］. IEEE Transactions on Communications, 1999,47(2): 217-229.

［4］JEREMIC A, THOMAS T A, NEHORAI A. OFDM channel estimation in the presence of interference［J］. IEEE Transactions on Signal Processing,2004, 52(12): 3429-3439.

［5］XUE P, KANG D K, KIM D K. Improved multi-cell joint channel estimation for TD-SCDMA downlink［C］// VTC Spring 2008: Proceeding of the IEEE Vehicular Technology Conference. Singapore: IEEE Press, 2008: 1458-1462.

［6］KANG G, WECKERLE M, COSTA E, et al. Time and frequency domain joint channel estimation in multi-branch systems［C］// Preceedings of the 5th WSEAS International Conference on Applied Electromagnetics, Wireless and Optical Communications. Corfu, Greece: WSEAS Press, 2005: 25-30.

［7］CHEN X, ZHANG N, CAO Y, et al. Further investigation on pilot design for MIMO OFDM systems in multi-cell environment［C］// VTC 2009-Fall: Preceeding of the 70th IEEE Vehicular Technology Conference.Anchorage, AK: IEEE Press, 2009: 1-5.

［8］GOLDSMITH A. Wireless communications［M］. Cambridge: Cambridge University Press, 2005.

［9］SATHYENDRAN A, SOWERBY K W, SHAFI M. A statistical approach to the analysis of DS/CDMA cellular systems employing RAKE receivers and sectorized antennas［J］. IEEE Transactions on Vehicular Technology, 1999, 48(1): 8-19.

［10］SIMEONE O, BAR-NESS Y, SPAGNOLINI U. Pilot-based channel estimation for OFDM systems by tracking the delay-subspace［J］. IEEE Transactions on Wireless Communications,2004, 3(1): 315-325.

［11］BARHUMI I, LEUS G, MOONEN M. Optimal training design for MIMO OFDM systems in mobile wireless channels［J］. IEEE Transactions on Signal Processing, 2003, 51(6): 1615-1624.

［12］SONG B, GUI L, ZHANG W. Comb type pilot aided channel estimation in OFDM systems with transmit diversity［J］. IEEE Transactions on Broadcasting, 2006, 52(1): 50-57.

［13］CHU D. Polyphase codes with good periodic correlation properties［J］. IEEE Transactions on Information Theory, 1972,18(4): 531-532.

［14］KAY S M. Fundamentals of statistical signal processing, Volume I: Estimaion theory［M］. Upper Saddle River,NJ: Prentice Hall Press, 1993.

［15］3GPP TS 25.996 V8.0.0. Spatial channel model for Multiple Input Multiple Output (MIMO) simulations(Release 8) ［S］.[S.l.]: 3GPP, 2008.

协作多小区正交频分复用系统联合信道估计扩展算法

Extended joint channel estimation in cooperative multi-cell OFDM systems

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