Title :
QRD-based precoded MIMO-OFDM systems with reduced feedback
Author :
Kim, Kyeong Jin ; Pun, Man-On ; Iltis, Ronald A.
Author_Institution :
Nokia Inc., Irving, TX, USA
fDate :
2/1/2010 12:00:00 AM
Abstract :
QR decomposition (QRD)-based precoded MIMO-OFDM systems with reduced feedback are proposed to convert the MIMO-OFDM channel into layered subchannels. QRD-M is further combined with either singular value (SVD) or geometric mean decomposition (GMD) of the time-domain channel impulse response matrix. As a result, the receiver in the proposed systems only needs to feed back information describing one precoding matrix for all carriers. Simulation results confirm the bit-error-rate (BER) and throughput performance superiority of the proposed systems compared to conventional SVD per-carrier precoding schemes.
Keywords :
MIMO communication; OFDM modulation; error statistics; precoding; singular value decomposition; time-domain analysis; BER performance; GMD; MIMO-OFDM channel; QR decomposition; QRD-based precoded MIMO-OFDM systems; SVD percarrier precoding scheme; bit error rate; feedback reduction; geometric mean decomposition; multiple-input multiple-output systems; orthogonal frequency division index multiplexing system; singular value decomposition; time-domain channel impulse response matrix; Bit error rate; Feedback; Feeds; Frequency division multiplexing; MIMO; Matrix converters; Matrix decomposition; OFDM; Throughput; Wireless communication; Orthogonal frequency division multiplexing (OFDM); geometric mean decomposition (GMD),QR decomposition (QRD); multiple-input multiple-output (MIMO); reduced feedback precoding;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2010.02.080339
