LDPC Coded OFDM with Alamouti/SVD Diversity Technique

Authors :: Ha, Jeongseok
Mody, Apurva N.
Sung, Joon H.
Barry, John R.
McLaughlin, Steven W.
Stuber, Gordon L.
Source :: Wireless Personal Communications. Oct, 2002, Vol. 23 Issue 1, p183, 12 p.
Publication Year :: 2002
Abstract: Byline: Jeongseok Ha (1), Apurva N. Mody (1), Joon H. Sung (1), John R. Barry (1), Steven W. McLaughlin (1), Gordon L. Stuber (1) Keywords: orthogonal frequency division multiplexing; singular-value decomposition; Alamouti diversity scheme; low-density parity-check codes 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.sup.-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. Author Affiliation: (1) School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, U.S.A Article History: Registration Date: 13/10/2004