Security analysis of co-located and distributed MIMO interference networks with linear receivers

Abstract

In this paper, we compare the performance of the linear receivers such as maximum-ratio combining (MRC), zero-forcing (ZF) and minimum mean-square error (MMSE) receivers in enhancing security for co-located MIMO (C-MIMO) and distributed MIMO (D-MIMO) interference network. We derive the expressions for secrecy achievable rates in case of MRC, ZF and MMSE receivers for both C-MIMO and D-MIMO systems. Then, we determine the effect of interference on secrecy achievable rate for C-MIMO and D-MIMO system with MRC, ZF and MMSE receivers. Our results show that, the performance of D-MIMO system in enhancing security is better than C-MIMO system in case of all three receivers. It is also observed that ZF and MMSE receivers are more affected by interferences in D-MIMO system with compared to C-MIMO system.