Title :
Capacity Analysis for a Distributed MIMO-OFDM System in Composite Spatially Correlated Channels
Author :
Zhou, Xiaolin ; Liu, Zhaowei ; Wang, Zongxin ; Suraweera, Himal A. ; Armstrong, Jean
Author_Institution :
Fudan Univ., Shanghai
Abstract :
Distributed antenna systems (DAS) have gained wide spread interest as an efficient means to expand system capacity, decrease transmission power and mitigate inter cell interference. In this paper, a distributed MIMO-OFDM system is studied over composite Rayleigh-lognormal multipath fading channels. Two kinds of information-theoretic capacity measures - ergodic capacity and outage capacity are evaluated. We also investigate the impact of spatial fading correlation on the capacity. From simulation results, we find that the distributed MIMO-OFDM scheme can bring a certain degree of capacity improvement because of macroscopic shadow fading diversity gain. Moreover, we show that, due to the decrease in spatial fading correlation, the distributed MIMO-OFDM scheme can provide capacity improvement compared with the conventional centralized MIMO-OFDM scheme.
Keywords :
MIMO communication; OFDM modulation; channel capacity; fading channels; interference (signal); MIMO-OFDM; Rayleigh-lognormal channels; composite channels; distributed antenna systems; ergodic capacity; information-theoretic capacity measures; inter cell interference; multipath fading channels; outage capacity; shadow fading diversity gain; spatial fading correlation; spatially correlated channels; system capacity; Broadband antennas; Channel capacity; Diversity reception; Fading; MIMO; Mobile antennas; Multipath channels; OFDM; Power engineering and energy; Transmitting antennas; composite channel; distributed MIMO-OFDM; spatial correlation;
Conference_Titel :
Communications and Networking in China, 2007. CHINACOM '07. Second International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1009-5
Electronic_ISBN :
978-1-4244-1009-5
DOI :
10.1109/CHINACOM.2007.4469582
