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Conference Paper
Blind Channel Estimation for Improper OFDM Systems with Linear Precoding
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- Authors
- Bang Won Seo, Hyun Kyu Chung
- Issue Date
- 2008-05
- Citation
- Vehicular Technology Conference (VTC) 2008 (Spring), pp.2106-2110
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- 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 Keywords
- 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