Optimization on semi-blind channel estimation for MIMO-OFDM systems

doi:10.1016/S1005-8885(15)60699-9

中国邮电高校学报(英文) ›› 2015, Vol. 22 ›› Issue (6): 86-93.doi: 10.1016/S1005-8885(15)60699-9

Optimization on semi-blind channel estimation for MIMO-OFDM systems

Sangirov Gulomjon, Fu Yongqing, Sangirov Jamshid

1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China 2. Electrical Engineering Department, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea

收稿日期:2015-05-18 修回日期:2015-10-15 出版日期:2015-12-31 发布日期:2015-12-30
通讯作者: Gulomjon Sangirov E-mail:gulomjons@hrbeu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (61401031), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

An optimization on semi-blind channel estimation for MIMO-OFDM systems

Sangirov Gulomjon, Fu Yongqing, Sangirov Jamshid

1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China 2. Electrical Engineering Department, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea

Received:2015-05-18 Revised:2015-10-15 Online:2015-12-31 Published:2015-12-30
Contact: Gulomjon Sangirov E-mail:gulomjons@hrbeu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (61401031), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

摘要/Abstract

摘要： An orthogonal frequency division multiplexing (OFDM) is one of the effective techniques used in wireless communication. In OFDM systems, channel impairments due to multipath dispersive spreading can cause deep fades in wireless channels. Thus, the OFDM receiver requires channel state information when coherent detection is involved. Therefore, to overcome the impact of channel fades good channel estimation (CE) methods are needed in OFDM systems. And one of these CE methods is a semi-blind CE. However, the semi-blind method requires a large number of processing operations. In order to avoid the high computing complexity of the existing method, scaled least square (SLS) technique is applied to improve the performance of the semi-blind channel estimator which require less knowledge of the channel second-order statistics and have better performance than the least square (LS) which used in semi-blind CE. Simulation results shows, this proposed method of semi-blind CE has the capacity of elevating CE performance in multiple-input multiple-output (MIMO) OFDM systems.

关键词: semi-blind channel estimation, OFDM, least square, scaled least square, MIMO

Abstract: An orthogonal frequency division multiplexing (OFDM) is one of the effective techniques used in wireless communication. In OFDM systems, channel impairments due to multipath dispersive spreading can cause deep fades in wireless channels. Thus, the OFDM receiver requires channel state information when coherent detection is involved. Therefore, to overcome the impact of channel fades good channel estimation (CE) methods are needed in OFDM systems. And one of these CE methods is a semi-blind CE. However, the semi-blind method requires a large number of processing operations. In order to avoid the high computing complexity of the existing method, scaled least square (SLS) technique is applied to improve the performance of the semi-blind channel estimator which require less knowledge of the channel second-order statistics and have better performance than the least square (LS) which used in semi-blind CE. Simulation results shows, this proposed method of semi-blind CE has the capacity of elevating CE performance in multiple-input multiple-output (MIMO) OFDM systems.

Key words: semi-blind channel estimation, OFDM, least square, scaled least square, MIMO

Sangirov Gulomjon, Fu Yongqing, Sangirov Jamshid. An optimization on semi-blind channel estimation for MIMO-OFDM systems[J]. Acta Metallurgica Sinica(English letters), 2015, 22(6): 86-93.

参考文献

1. Vesnik M V. On the possibility of the application of axially displaced ellipse antenna elements for construction of a compact multibeam antenna system. IEEE Antennas and Propagation Magazine, 2011, 53(2):125-128

2. Prata A Jr, Moreira F J S, Amaro L R. Displaced-axis-ellipse reflector antenna for spacecraft communications. Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC’03): Vol 1, Sept 20-23, 2003, Foz do Iguacu, Brazil. Piscataway, NJ, USA: IEEE, 2003: 391-395

3. Kim W. Low-loss feedome design for axially displaced ellipse (ADE) reflectors. IEEE Antennas and Wireless Propagation Letters, 2008, 7: 721-724

4. Granet C. A simple procedure for the design of classical displaced-axis dual-reflector antennas using a set of geometric parameters. IEEE Antennas and Propagation Magazine, 1999, 41(6): 64-71

5. Bergmann J R, Moreira F J S. Omnidirectional dual-reflector antenna with GO shaped main reflector for pattern control in the elevation plane: OADC case. International Journal of Antennas and Propagation, 2012: 326925/1-6

6. da Silva Moreira F J, Bergmann J R. Classical axis-displaced dual-re?ector antennas for omnidirectional coverage. IEEE Transactions on Antennas and Propagation, 2005, 53(9): 2799-2808

7. Penchel R A, Zang S R, Bergmann J R, et al. Synthesis and rigorous analysis of omnidirectional ADE antenna with shaped main reflector described by local conic sections. Proceeding of the 6th European Conference on Antennas and Propagation (EUCAP’12), Mar 26-30, 2012, Prague, Czech. Piscataway, NJ, USA: IEEE, 2012: 3110-3114

8. Ludwig A. The definition of cross polarization. IEEE Transactions on Antennas and Propagation, 1973, 21(1): 116-119

9. Balanis C A. Antenna theory: analysis and design. 3rd ed. New York, NY, USA: Wiley, 2005

10. Kildal P S, Olsen E, Aas J A. Losses, sidelobes, and cross polarization caused by feed-support struts in reflector antennas: design curves. IEEE Transactions on Antennas and Propagation, 1988, 36(2):182-190

Optimization on semi-blind channel estimation for MIMO-OFDM systems

An optimization on semi-blind channel estimation for MIMO-OFDM systems

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