Open AccessCapacity analysis for multi‐antenna dual‐hop AF system with random co‐channel interference
Author(s) -
Zhang Yunhan,
Xue Jiang,
Ratnarajah Thomalingam
Publication year - 2017
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2016.1134
Subject(s) - rayleigh fading , maximal ratio combining , poisson point process , minimum mean square error , relay , topology (electrical circuits) , co channel interference , computer science , interference (communication) , channel (broadcasting) , hop (telecommunications) , mathematics , fading , algorithm , telecommunications , poisson distribution , statistics , physics , estimator , combinatorics , power (physics) , quantum mechanics
In this work, the performance of a dual‐hop amplify‐and‐forward (AF) multi‐antenna relaying system over Rayleigh fading channels with random co‐channel interference (CCI) is investigated. Three receiving strategies such as the maximal‐ratio combining (MRC), zero‐forcing (ZF) and minimum mean square error (MMSE) are employed in the relay to mitigate the impact of CCI which follows a Poisson point process. In second hop, the relay forwards the signal to the destination by using maximum ratio transmission (MRT). Specifically, we derive the asymptotic expressions of the capacities for this system. The simulation and analytical results show that the MMSE/MRT scheme always provides significant improvement on capacity compared with MRC/MRT and ZF/MRT schemes. Furthermore, the MRC/MRT scheme gives almost the same performance as the MMSE/MRT scheme when the density of CCI sources is high.