Performance comparison of different selection combining algorithms in presence of co-channel interference

• Published in: IEEE transactions on vehicular technology Vol. 55; no. 2; pp. 559 - 571
• Main Authors: Lin Yang, Alouini, M.-S.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.03.2006; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithm design and analysis; Algorithms; Applied sciences; Argon oxygen decarburizing; Average outage duration (AOD); Channels; co-channel interference (CCI); Dealing; diversity combining; Diversity reception; Exact sciences and technology; Fading; Interchannel interference; Interference; Interference constraints; level crossing rate (LCR); Level crossings; outage probability; Outages; Power measurement; Radiofrequency interference; Receivers; selection combining (SC); Signal processing algorithms; Signal to noise ratio; Studies; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Wireless communication; wireless communication systems; Outage; Cochannel interference; Wireless telecommunication; level crossing rate (LCR); Data transmission; Average outage duration (AOD); Signal to interference ratio; selection combining (SC); outage probability; Diversity combining; Level crossing rate; wireless communication systems; Performance analysis; co-channel interference (CCI)
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2005.858171

In this paper, we present a unified approach for the computation of the outage probability, the level crossing rate (LCR), and the average outage duration (AOD) of selection combining (SC) in the presence of multiple cochannel interferences and under both minimum signal-to-interference ratio (SIR) and desired signal power constraints. We consider three selection algorithms, namely: 1) the best signal power algorithm; 2) the best SIR algorithm; and 3) the best total power (desired plus interference) algorithm. As a specific application example, we analyze the three algorithms for a low-complexity dual-branch SC receiver subject to multiple interferers over Rayleigh fading channels. When applicable, the new results are compared to those previously reported in the literature dealing with the outage probability, AOD, and LCR of 1) interference-limited systems and 2) power-limited systems. Numerical examples show that the minimum desired signal power constraint induces a floor to the outage probability, AOD, and LCR performance measures. They also show that the best SIR algorithm provides the best outage probability and AOD performance for low average SIR. On the other hand, the best signal power algorithm and the best S+I algorithm outperform the best SIR algorithm for high average SIR. It is also shown that the best SIR algorithm tends to have more outage level crossings.