Title :
Pseudo-Inverse MMSE Based QRD-M Algorithm for MIMO OFDM
Author :
Sun, Sumei ; Dai, Yongmei ; Lei, Zhongding ; Kenichi, Higuchi ; Kawai, Hiroyuki
Author_Institution :
Inst. for Infocomm Res.
Abstract :
We propose a pseudo-inverse minimum mean squared error (MMSE) based QR decomposition (QRD) M-algorithm (QRD-M) for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The proposed algorithm can effectively mitigate the detrimental effect of MIMO channel ill-conditions on the bit error rate (BER) performance. As a result, the number of retained branches (M value) can be reduced to half of the original QRD-M algorithm in Kyeong Jin Kim and R.A. Iltis (2002) in order to achieve the same performance for both the uncoded and coded systems. The detection complexity is therefore greatly reduced
Keywords :
MIMO systems; OFDM modulation; error statistics; least mean squares methods; MIMO OFDM; MIMO channel ill-conditions; QR decomposition M-algorithm; QRD-M algorithm; bit error rate performance; detection complexity; detrimental effect; multiple-input multiple-output system; orthogonal frequency division multiplexing system; pseudo-inverse MMSE; pseudo-inverse minimum mean squared error; retained branches; Bit error rate; Intersymbol interference; Iterative algorithms; MIMO; Matrix decomposition; Maximum likelihood decoding; OFDM; Receiving antennas; Sun; Wideband;
Conference_Titel :
Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-9391-0
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2006.1683095
