Semi-blind channel estimation for block precoded space-time OFDM transmissions

Shengli Zhou, Bertrand Muquet, Georgios B Giannakis

Research output: Contribution to conferencePaper

12 Scopus citations

Abstract

We develop in this paper a (semi-) blind channel estimation algorithm for space time (ST) block precoded OFDM transmissions over frequency-selective channels. We establish that multi-channel identifiability is guaranteed up to one or two scalar ambiguities, when distinct or identical precoders are employed for even and odd indexed symbol blocks. With known pilots inserted before precoding, we resolve the residual scalar ambiguities and show that distinct precoders require less pilots than identical precoders to achieve the same channel estimation accuracy. Simulation results confirm our theoretical analysis and illustrate that the proposed semiblind algorithm is capable of tracking slow channel variations and improving the overall system performance relative to competing differential ST alternatives.

Original languageEnglish (US)
Pages381-384
Number of pages4
StatePublished - Dec 1 2001
Event2001 IEEE Workshop on Statitical Signal Processing Proceedings - Singapore, Singapore
Duration: Aug 6 2001Aug 8 2001

Other

Other2001 IEEE Workshop on Statitical Signal Processing Proceedings
CountrySingapore
CitySingapore
Period8/6/018/8/01

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    Zhou, S., Muquet, B., & Giannakis, G. B. (2001). Semi-blind channel estimation for block precoded space-time OFDM transmissions. 381-384. Paper presented at 2001 IEEE Workshop on Statitical Signal Processing Proceedings, Singapore, Singapore.