DocumentCode :
2562468
Title :
Capacity analysis for compact MIMO systems
Author :
Lau, B.K. ; Ow, S.M.S. ; Kristensson, G. ; Molisch, A.F.
Author_Institution :
Dept. of Electroscience, Lund Univ., Sweden
Volume :
1
fYear :
2005
fDate :
30 May-1 June 2005
Firstpage :
165
Abstract :
We analyze the impact of mutual coupling on the capacity of MIMO systems with compact antenna arrays. Existing studies present conflicting views on the effect of mutual coupling. This is, in part, due to their different scopes and underlying assumptions of the system setups. In this paper, we aim to give a comprehensive picture by first examining the impact of mutual coupling on three capacity-related performance measures: antenna correlation, efficiency and bandwidth. While the first two aspects have received significant attention, antenna bandwidth with mutual coupling is a relatively uncharted territory. We show that while implementing a good matching network can drastically improve the system capacity for narrowband systems in the presence of strong mutual coupling, the same conclusions may not necessarily apply to wideband cases. To exemplify this, we carry out capacity simulations for an end-to-end MIMO system where a recently proposed S-parameter approach is used in conjunction with the 3GPP-3GPP2 channel model to model realistic wideband channel and antenna effects at both transmit and receive ends.
Keywords :
3G mobile communication; MIMO systems; S-parameters; antenna arrays; broadband antennas; channel capacity; correlation theory; electromagnetic coupling; receiving antennas; transmitting antennas; 3GPP-3GPP2 channel model; S-parameter approach; antenna bandwidth; antenna correlation; antenna efficiency; capacity analysis; compact MIMO systems; compact antenna arrays; end-to-end MIMO system; mutual coupling; receive antenna; transmit antenna; wideband channel; Antenna arrays; Antenna measurements; Bandwidth; Broadband antennas; MIMO; Mutual coupling; Narrowband; Receiving antennas; Scattering parameters; Wideband; MIMO system; channel capacity; mutual coupling;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
ISSN :
1550-2252
Print_ISBN :
0-7803-8887-9
Type :
conf
DOI :
10.1109/VETECS.2005.1543271
Filename :
1543271
Link To Document :
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