DocumentCode :
1789066
Title :
The impact of frequency-selective matching on the capacity of compact MIMO systems
Author :
Kundu, Lopamudra ; Hughes, Brian L.
Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA
fYear :
2014
fDate :
10-14 June 2014
Firstpage :
2215
Lastpage :
2220
Abstract :
Mutual coupling among receive antennas can profoundly reduce the ergodic capacity of MIMO systems. Prior work has shown that these losses can often be mitigated by using multi-port antenna matching at the receiver; however, previous studies have focused exclusively on frequency-nonselective matching and rely on assumptions which are valid only for small bandwidths. In this paper, we revisit the ergodic capacity of a MIMO system with coupled receive antennas for a non-negligible bandwidth. In particular, we present upper and lower bounds on the best possible MIMO capacity that can be achieved by physically-realizable, frequency-selective (FS) multi-port and single-port matching networks. These results suggest that FS matching can significantly increase capacity in the presence of strong coupling, for both single-port and multi-port scenarios. Moreover, we show that these gains can be achieved for a 2 × 2 MIMO system by a simple class of matching networks that are easily realized in hardware.
Keywords :
MIMO communication; multiport networks; receiving antennas; MIMO capacity; compact MIMO systems; coupled receive antennas; ergodic capacity; frequency-nonselective matching; frequency-selective matching; multiport antenna matching; mutual coupling; nonnegligible bandwidth; physically-realizable frequency-selective multiport matching networks; single-port matching networks; Antenna arrays; Bandwidth; Impedance; MIMO; Noise; OFDM; Receiving antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications (ICC), 2014 IEEE International Conference on
Conference_Location :
Sydney, NSW
Type :
conf
DOI :
10.1109/ICC.2014.6883652
Filename :
6883652
Link To Document :
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