LDPC Coded OFDM with Alamouti/SVD Diversity Technique

Authors:
Jeongseok Ha;Apurva N. Mody;Joon H. Sung;John R. Barry;Steven W. Mclaughlin;Gordon L. Stüber
Affiliations:
School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, U.S.A.;School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, U.S.A.;School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, U.S.A.;School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, U.S.A.;School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, U.S.A.;School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, U.S.A. E-mail: stuber@ece.gatech.edu
Venue:
Wireless Personal Communications: An International Journal
Year:
2002

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Abstract

Two transmit two receive space-time processingwith LDPC coding is evaluated for OFDM transmission.The two methodsfor space-time processing are Alamouti's combining and the SVD technique.The channel estimates are calculated and provided tothe diversity combiner, the SVD filters and LDPC decoder.Noise variance estimates areprovided to the LDPC decoder. Using the proposed schemewe can obtain a BER of 10−5 at an SNR of 2.6 dB withspectral efficiency of0.4 bits/sec/Hz and 14.5 dB with a spectral efficiency of 4.2 bits/sec/Hz.