TY - GEN
T1 - Limited feedback for multi-antenna multi-user communications with generalized multi-unitary decomposition
AU - Chua, Wee Seng
AU - Yuen, Chau
AU - Guan, Yong Liang
AU - Chin, Francois
PY - 2008
Y1 - 2008
N2 - In this paper, we propose a decomposition method called Generalized Multi-Unitary Decomposition (GMUD) which is useful in multi-user MIMO precoding. This decomposition transforms a complex matrix H∈ ℂ m×n into H = PiRQiH, where R is a special matrix whose first row contains only a non-zero user defined value at the left-most position, Pi and Qi are a pair of unitary matrices. The major attraction of our proposed GMUD is we can obtain multiple solutions of Pi and Qi · With GMUD, we propose a precoding method for a MIMO multi-user system that does not require full channel state information (CSI) at the transmitter. The proposed precoding method uses the multiple unitary matrices property to compensate the inaccurate feedback information as the transmitter can steer the transmission beams of individual users such that the inter-user interference is kept minimum.
AB - In this paper, we propose a decomposition method called Generalized Multi-Unitary Decomposition (GMUD) which is useful in multi-user MIMO precoding. This decomposition transforms a complex matrix H∈ ℂ m×n into H = PiRQiH, where R is a special matrix whose first row contains only a non-zero user defined value at the left-most position, Pi and Qi are a pair of unitary matrices. The major attraction of our proposed GMUD is we can obtain multiple solutions of Pi and Qi · With GMUD, we propose a precoding method for a MIMO multi-user system that does not require full channel state information (CSI) at the transmitter. The proposed precoding method uses the multiple unitary matrices property to compensate the inaccurate feedback information as the transmitter can steer the transmission beams of individual users such that the inter-user interference is kept minimum.
UR - http://www.scopus.com/inward/record.url?scp=69949116887&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=69949116887&partnerID=8YFLogxK
U2 - 10.1109/PIMRC.2008.4699893
DO - 10.1109/PIMRC.2008.4699893
M3 - Conference contribution
AN - SCOPUS:69949116887
SN - 9781424426447
T3 - IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
BT - 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008
T2 - 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2008
Y2 - 15 September 2008 through 18 September 2008
ER -