Title :
Design and analysis of multi-user SDMA systems with noisy limited CSIT feedback
Author :
Wu, Tianyu ; Lau, Vincent K N
Author_Institution :
Dept of EEE, Hong Kong Univ. of Sci. & Technol., Hong Kong, China
fDate :
4/1/2010 12:00:00 AM
Abstract :
In this paper, we consider spatial-division multiple-access (SDMA) systems with one base station with multiple antennae and a number of single antenna mobiles under noisy limited CSIT feedback. We propose a robust noisy limited feedback design for SDMA systems. Furthermore, we show that despite the noisy feedback, the average system goodput scales as O(nT(1-¿)/nT-1(Cfb -log2(Nn))) and O(nT·log2 P) in the interference limited regime (Cfb < (nT - 1) log2 P + log2 Nn) and noise-limited regime respectively.
Keywords :
WiMax; feedback; mobile antennas; mobile radio; space division multiple access; WiMAX; multiple antennae; multiuser SDMA systems; noise-limited regime; noisy feedback; noisy limited CSIT feedback; single antenna mobiles; spatial-division multiple- access systems; Antenna feeds; Base stations; Feedback; Interference; Mobile antennas; Multiaccess communication; Noise robustness; Signal to noise ratio; Transmitting antennas; WiMAX; SDMA, limited feedback, index assignment.;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2010.04.090406
