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학술대회 Blind Channel Estimation for Improper OFDM Systems with Linear Precoding
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서방원, 정현규
Vehicular Technology Conference (VTC) 2008 (Spring), pp.2106-2110
08MM1100, 4세대 이동통신을 위한 적응 무선접속 및 전송 기술개발, 김영진
In this paper, we propose a non-redundant precoding-assisted blind channel estimation scheme for the improper orthogonal frequency-division multiplexing (OFDM) systems. In the proposed scheme, a modified cross-correlation matrix of the augmented received signal is obtained by dividing the crosscorrelation matrix of the even-indexed and odd-indexed OFDM received signal by the precoding matrix element-wise. The channel coefficient vector is estimated as a principal eigenvector of the modified cross-correlation matrix, and it is obtained by the computationally simple power method without the need of the complicate eigenvalue decomposition. Simulation results show that the channel estimation and bit error rate (BER) performance of the proposed scheme is superior to that of the conventional precoding-assisted blind channel estimation scheme. © 2008 IEEE.
KSP 제안 키워드
Bit Error Rate(And BER), Blind channel estimation, Channel Coefficients, Channel estimation(CE), Coefficient vector, Cross-correlation matrix(CCM), Linear precoding, Matrix element, Non-redundant, OFDM systems, Power Method