2010•Journal of Tsinghua University(Science and Technology)Requires access

Two-dimensional MMSE channel estimation for single-carrier frequency equalization

Jianhua Lü

Abstract

Cyclic-prefix-based block processing is adopted in single-carrier frequency equalization(SC-FDE) system,which makes discrete channel estimation and equalization possible.A two-dimensional minimum mean square error(MMSE) channel estimation algorithm was developed for the SC-FDE system in this paper.With separation property of mobile wireless channels,the two-dimensional estimation can be simplified as an MMSE interpolation in the frequency domain cascaded by an MMSE filter in the time domain.The simplified algorithm is suitable to SC-FDE with unique word(UW),i.e.UW-SC-FDE,as well as with pilot,i.e.Pilot-SC-FDE.Simulation results indicate that the algorithm is much superior to the one-dimensional channel estimation algorithm,for both UW-SC-FDE and Pilot-SC-FDE systems.The performance of the proposed algorithm gets close to that of ideal channel estimation.

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Key concepts: Cyclic prefix, SC-FDE, Equalization (audio), Algorithm, Channel (broadcasting), Computer science, Frequency domain, Minimum mean square error