A novel subspace-based semi-blind channel estimation scheme for MIMO ZP-OFDM systems

Authors:
Wenjun Huo;Changzhou Fan;Jianxin Guo;Linghua Su;Hui Zhang
Affiliations:
Telecommunication Engineering Institute, Air Force Engineering University, Xi'an, China;Telecommunication Engineering Institute, Air Force Engineering University, Xi'an, China;Telecommunication Engineering Institute, Air Force Engineering University, Xi'an, China;Telecommunication Engineering Institute, Air Force Engineering University, Xi'an, China;Telecommunication Engineering Institute, Air Force Engineering University, Xi'an, China
Venue:
IScIDE'11 Proceedings of the Second Sino-foreign-interchange conference on Intelligent Science and Intelligent Data Engineering
Year:
2011

Citing 4
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Abstract

It has been proposed to replace the cyclic prefix (CP) in OFDM transmission by zero-padding (ZP). ZP-OFDM can be equivalent to redundant linearly precoded CP-OFDM. Based on this equivalent model, a subspace-based channel estimation scheme for multi-input multi-output (MIMO) ZP-OFDM is developed in this paper. Subsequently, pilots are set suitably so that multi-dimension ambiguity is resolved effectively. Simulations verify the channel estimation method and pilots setting scheme. The results demonstrate that the pilots used for resolving ambiguity matrix effect on the estimation scheme evidently. The more pilots, the better performance is gotten.