An RLS Adaptive Channel Estimation Algorithm for Practical OFDM Systems

doi:10.13190/jbupt.200703.88.tangt

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (3): 88-92.doi: 10.13190/jbupt.200703.88.tangt

• Reports • Previous Articles Next Articles

An RLS Adaptive Channel Estimation Algorithm for Practical OFDM Systems

TANG Tian, JIANG Jun, ZHANG Ping

Telecommunication Engineering School, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2006-08-23 Revised:2006-11-28 Online:2007-06-30 Published:2007-06-30
Contact: TANG Tian

Abstract

Abstract:

The channel impulse response (CIR) leakage in OFDM channel estimation is analyzed. A new one- dimensional (1D) recursive least square (RLS) adaptive channel estimation algorithm is proposed in time domain. To reduce the CIR leakage, the input signals and reference signals of the RLS filter are weighted by a matrix that is independent to the channel statistics. Keeping the simplicity of the 1D-RLS algorithm, the proposed algorithm has much lower computational cost than the 2D-RLS counterpart. The simulation results show that the proposed algorithm improves the MSE performance of the 1D-RLS channel estimation significantly in the non-sample-spaced multipath fading channel. The MSE performance can even approach the result of the 2D-RLS algorithm.

Key words: OFDM, adaptive channel estimation, RLS

CLC Number:

TN929.5

TANG Tian, JIANG Jun, ZHANG Ping. An RLS Adaptive Channel Estimation Algorithm for Practical OFDM Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(3): 88-92.

[1]	. Traditional clothing image classification algorithm based on multi-layer discriminant dictionary learning [J]. Journal of Beijing University of Posts and Telecommunications, 2023, 46(2): 104-108.
[2]	XU Gui-xian, MA Wei-guo, REN Yu-wei. Proportional Fairness-guaranteed Energy-efficient Resource Allocation for MIMO-OFDM Systems [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2015, 38(4): 70-75.
[3]	HUANG Ming,ZENG Yong-bo ,LI Zheng-ping,LUO Shou-shan ,XU Cheng-qian. A New Joint Symbol Synchronization and Fine Frequency Offset Estimation Algorithm in IEEE 802.11n [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2012, 35(4): 59-63.
[4]	. A Method for Blind Detection of OFDM Signal Based on Cepstrum Processing [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 29(s1): 137-140.
[5]	TANG Tian,JIANG Jun,ZHANG Ping. A Channel Estimation Algorithm for OFDM Based on PCC Training Symbols [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(4): 37-40.
[6]	MA Nan, WANG Ying, ZHANG Ping. Multi-Carrier Proportional Fair Scheduling based on Genetic Algorithm [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(3): 104-107.
[7]	WU Xiaoguang, ZHANG Zhi, DENG Gang, ZHANG Ping. A Channel Estimation Method of High precision in OFDM System [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(3): 100-103.
[8]	WU Tong, QU Xin-chun, WANG Ying. Joint Optimization for Two-hop OFDM-relay System Based on Immunity Genetic Algorithms [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(3): 70-74.
[9]	GAO You-jun, TIAN Hui, SUN Lei . A MAC Protocol Based on OFDMA Technique [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(3): 113-116.
[10]	YU Yi-fan, JI Hong, YUE Guang-xin . A Novel Wireless IP Packets scheduling Algorithm with QoS guaranteeing Based on OFDM system [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2006, 29(3): 61-65.
[11]	ZHENG Laibo1,2,YUAN Dongfeng1,HU Jiandong2. The Frequency Offset Estimation Algorithm for OFDM Systems Based on Pilot Symbols and Decision Data [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2005, 28(5): 21-24.
[12]	ZHENG Laibo1,2,HU Jiandong1. The Tracking Range of CFO Tracking Algorithm Based on Signal Reconstruction for OFDM [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2005, 28(2): 80-83.
[13]	LUO Tao, TENG Yong, TONG Xue-jian, YUE Guang-xin. Space-Time Block Codes Design in OFDM System [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2004, 27(1): 45-49.
[14]	XIAO Jian-hua, ZHANG Ping. Adaptive Modulation for Variable-Rate OFDM System with Imperfect Channel Knowledge [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2003, 26(3): 17-21.
[15]	TENG Yong,　 LUO Tao,　 YUE Guang-xin,　 YIN Chang-chuan . An OFDM System with Concatenated Trellis-Coded Modulation and Space-Time Block Coding [J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2003, 26(3): 66-70.

An RLS Adaptive Channel Estimation Algorithm for Practical OFDM Systems

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments