Analysis of decision-feedback based broadband OFDM systems

Alexandre De Baynast; Ashutosh Sabharwal; Behnaam Aazhang

Analysis of decision-feedback based broadband OFDM systems

Alexandre De Baynast, Ashutosh Sabharwal, Behnaam Aazhang

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In wireless communications, about 25% of the band-width is dedicated to training symbols for channel estimation. By using a semi-blind approach, the training sequence length can be reduced while improving performance. The principle is as follows: the detected symbols (hard decision) are fed back to the channel estimator in order to re-estimate the channel more accurately. However, semi-blind approach can significantly deteriorate the performance if the bit error rate is high. In this paper, we propose to determine analytically the minimum Signal to Noise Ratio (SNR) from which a semi-blind method starts to outperform a training sequence based only system.

Original language	English (US)
Title of host publication	Conference Record of The Thirty-Ninth Asilomar Conference on Signals, Systems and Computers
Pages	692-696
Number of pages	5
State	Published - 2005
Event	39th Asilomar Conference on Signals, Systems and Computers - Pacific Grove, CA, United States Duration: Oct 28 2005 → Nov 1 2005

Publication series

Name	Conference Record - Asilomar Conference on Signals, Systems and Computers
Volume	2005
ISSN (Print)	1058-6393

Other

Other	39th Asilomar Conference on Signals, Systems and Computers
Country/Territory	United States
City	Pacific Grove, CA
Period	10/28/05 → 11/1/05

ASJC Scopus subject areas

Signal Processing
Computer Networks and Communications

Cite this

Analysis of decision-feedback based broadband OFDM systems. / De Baynast, Alexandre; Sabharwal, Ashutosh; Aazhang, Behnaam.
Conference Record of The Thirty-Ninth Asilomar Conference on Signals, Systems and Computers. 2005. p. 692-696 1599840 (Conference Record - Asilomar Conference on Signals, Systems and Computers; Vol. 2005).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

De Baynast, A, Sabharwal, A & Aazhang, B 2005, Analysis of decision-feedback based broadband OFDM systems. in Conference Record of The Thirty-Ninth Asilomar Conference on Signals, Systems and Computers., 1599840, Conference Record - Asilomar Conference on Signals, Systems and Computers, vol. 2005, pp. 692-696, 39th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, United States, 10/28/05.

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Analysis of decision-feedback based broadband OFDM systems

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ASJC Scopus subject areas

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