Please wait a minute...
ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (2 ): 7-    DOI: 10.1631/jzus.2006.A0149
    
An improved channel estimation with multipath search for MIMO-OFDM systems
Hou Xiao-yun, Zheng Bao-yu, Xu You-yun, Song Wen-tao
Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; Department of Information Engineering, Nanjing University of Posts & Telecommunications, Nanjing 210003, China; Institute of Communication Engineering, PLA Science and Technology University, Nanjing 210007, China
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

Abstract  This paper addresses the problem of channel estimation for broadband MIMO-OFDM systems. An improved channel estimator with multipath time delay detection and channel gain estimation is proposed. In the algorithm, we used the correlation of the channel taps and a well-designed adjustment scheme to increase the accuracy of the time delay detection. The most attractive advantage is that the complicated matrix calculation is replaced by search steps which can acquire the channel order and estimate the channel parameters without significantly increasing the complexity of the system. Computer simulation showed that the proposed algorithm can track the time delays adaptively and, consequently, improve the channel estimation performance.

Key words： Channel estimation      MIMO      OFDM      Time-delay estimation     
Received: 26 October 2004     
CLC:  TN911.5  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Hou Xiao-yun
Zheng Bao-yu
Xu You-yun
Song Wen-tao
Cite this article:

Hou Xiao-yun, Zheng Bao-yu, Xu You-yun, Song Wen-tao. An improved channel estimation with multipath search for MIMO-OFDM systems. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(2 ): 7-.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.A0149     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/I2 /7

[1] Sheng-bo CHEN, Wei CHEN, Wei-lan HUANG, Li-jun ZHAI, Xu-ming LIU. A cross-layer approach to enable multipacket transmission in MIMO-SDMA based WLAN[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(2): 271-278.
[2] Yuan YANG, Hai-lin ZHANG. A simplified MMSE-based iterative receiver for MIMO systems[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(10): 1389-1394.
[3] Ashfaq Ahmad MIAN, Dao-bo WANG. Dynamic modeling and nonlinear control strategy for an underactuated quad rotor rotorcraft[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(4): 539-545.
[4] Zhen LU, Jian-hua GE. Time-domain training sequences design for MIMO OFDM channel estimation[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(4): 464-469.
[5] Feng SHE, Han-wen LUO, Lei CHEN, Hua XIA. Power duality for multi-antenna OFDM system in broadcast channel with user scheduling[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(2): 215-224.
[6] Min-jian ZHAO, Di ZHANG, Bin CAI. Optimum weighting-coefficient-pair in inter-carrier interference self-cancellation scheme of OFDM system[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(12): 1676-1684.
[7] Jian-ping ZHENG, Bao-ming BAI, Xin-mei WANG. Peak-power reduction by the lattice-reduction-aided closest point search for MIMO broadcast channels[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(10): 1326-1330.
[8] ZHAO Zhen-shan, XU Guo-zhi. Optimal transmission strategy for spatially correlated MIMO systems with channel statistical information[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(4): 615-619.
[9] SHE Feng, LUO Han-wen, WANG Xin. A novel MMSE based codebook construction for MIMO precoded spatial multiplexing with limited feedback[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(12): 1894-1900.
[10] CHEN Rong, ZHANG Hai-bin, XU You-yun, LIU Xin-zhao. Blind receiver for OFDM systems via sequential Monte Carlo in factor graphs[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(1 ): 1-.
[11] DING Ming, LUO Han-wen, WU Yun. A novel cell search scheme for OFDM cellular systems[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(1 ): 2-.
[12] WANG Zhi-ying, HE Chen. Adaptive modulation MIMO system based on minimizing transmission power[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(6 ): 17-.
[13] Liang Yong-ming, Luo Han-wen, Huang Jian-guo. RLS channel estimation with adaptive forgetting factor in space-time coded MIMO-OFDM systems[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(4): 507-515.
[14] Zhao Zhong-wei. Performance of a novel carrier frequency offset estimation algorithm for OFDM-based WLANs[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(3 ): 7-.
[15] Gan Xiao-ying, Xu You-yun, Guan Yun-feng, Song Wen-tao. Time-domain clustered transmit power adaptation for OFDM system in fading channels[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(2 ): 5-.