Title :
Error probability for MIMO zero-forcing receiver with adaptive power allocation in the presence of imperfect channel state information
Author :
Au, Edward K S ; Wang, Cheng ; Sfar, Sana ; Murch, Ross D. ; Mow, Wai Ho ; Lau, Vincent K N ; Cheng, Roger S. ; Letaief, Khaled
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol.
fDate :
4/1/2007 12:00:00 AM
Abstract :
Link adaptation allows the transmitter to adapt to changing channel conditions. Critical to the design of link adaptation is the accuracy of channel state information at the transmitter. In this paper, we investigate the effect of imperfect channel state information and feedback delay on the performance of a multiple-input multiple-output zero-forcing receiver with adaptive power allocation. A closed-form approximate upper bound on bit error rate is derived for M-ary phase shift keying and M-ary quadrature amplitude modulation and it is valid for arbitrary numbers of transmit and receive antennas. Comparison with Monte Carlo simulations is also provided, showing that the results derived from this analytical bound are useful for system design
Keywords :
MIMO communication; error statistics; matrix algebra; phase shift keying; quadrature amplitude modulation; radio links; radio receivers; wireless channels; M-ary phase shift keying; M-ary quadrature amplitude modulation; MIMO zero-forcing receiver; Monte Carlo simulations; adaptive power allocation; bit error rate; channel state information; closed-form approximate upper bound; error probability; feedback delay; link adaptation; multiple-input multiple-output; receive antennas; transmit antennas; transmitter; Bit error rate; Channel state information; Delay effects; Error probability; MIMO; Phase shift keying; Quadrature amplitude modulation; State feedback; Transmitters; Upper bound;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2007.348348
