Low SNR Capacity for MIMO Rician and Rayleigh-Product Fading Channels with Single Co-channel Interferer and Noise

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Abstract

This paper studies the ergodic capacity of multipleinput multiple-output (MIMO) systems with a single co-channel interferer in the low signal-to-noise-ratio (SNR) regime. Two MIMO models namely Rician and Rayleigh-product channels
are investigated. Exact analytical expressions for the minimum energy per information bit, 퐸푏/푁0min, and wideband slope, 푆0, are derived for both channels. Our results show that the minimum energy per information bit is the same for both channels while their wideband slopes differ significantly. Further,
the impact of the numbers of transmit and receive antennas, the Rician 퐾 factor, the channel mean matrix and the interferenceto-noise-ratio (INR) on the capacity, is addressed. Results indicate that interference degrades the capacity by increasing the required minimum energy per information bit and reducing the wideband slope. Simulation results validate our analytical results.
Original languageEnglish
Pages (from-to)2549-2560
Number of pages11
JournalIEEE Transactions on Communications
Volume58
Issue number09
DOIs
Publication statusPublished - 1 Sep 2010

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