Title :
Modified Subspace Based Channel Estimation Algorithm for OFDM Systems
Author :
Fang, Shih-Hao ; Chen, Ju-Ya ; Shieh, Ming-Der ; Lin, Jing-Shiun
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng-Kung Univ., Tainan
Abstract :
A modified subspace-based blind channel estimation algorithm for OFDM systems is proposed in this paper. A systematic approach is used to construct the signal matrix in the proposed algorithm. Compared with conventional subspace- based blind channel estimation algorithm, the proposed algorithm has lower computational complexity and higher probability of full row rank for the corresponding signal matrix. In addition, fewer OFDM symbols can be used to satisfy the necessary condition for achieving a full-row-rank signal matrix. Simulation results show that the proposed algorithm outperforms conventional method in mean-squared error and bit error rate under static channel. Even with a smaller number of received OFDM symbols, the proposed algorithm can perform well.
Keywords :
OFDM modulation; blind equalisers; channel estimation; computational complexity; error statistics; mean square error methods; OFDM systems; bit error rate; computational complexity; mean-squared error; modified subspace based channel estimation algorithm; modified subspace-based blind channel estimation algorithm; signal matrix; static channel; Bit error rate; Blind equalizers; Channel estimation; Computational complexity; Computational modeling; Fading; OFDM; Robustness; Time domain analysis; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-2517-4
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2009.5073690
