MMSE channel estimation scheme based on two-dimensional hadamard transform for OFDM systems

Authors:
Qihong Ge;Liuguo Yin;Huazhong Yang
Affiliations:
Tsinghua University, Department of Electronic Engineering, Beijing, China;Tsinghua University, Department of Electronic Engineering, Beijing, China;Tsinghua University, Department of Electronic Engineering, Beijing, China
Venue:
MUSP'06 Proceedings of the 6th WSEAS international conference on Multimedia systems & signal processing
Year:
2006

Citing 3
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Abstract

In this paper, a novel minimum-mean-square-error (MMSE) channel estimation algorithm for OFDM systems is proposed. The algorithm adopts two-dimensional Hadamard transform (TDHT) instead of the conventional Fourier transform, and more noise interference can be filtered with the proposed scheme. Both analytical and simulation results show that the performance of the proposed algorithm is better than that with Fourier Transform. The performance of the proposed scheme is even close to that with perfect channel estimation scheme. Furthermore, the computation of TDHT takes only complex additions, and thus the complexity of which is much lower than the scheme with Fourier transform since complex multiplications are not needed. Consequeltly, the proposed channel estimation scheme is more practical for applications in OFDM systems than the scheme with Fourier transform.