Multiple Antenna Systems With Hardware Impairments: New Performance Limits

Sidrah Javed, Osama Amin, Salama S. Ikki, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In this paper, we accurately model the impact of aggregate hardware impairments (HWIs) in communication systems as improper Gaussian signals (IGS), which can describe the asymmetric characteristics of different HWI sources. The proposed model encourages us to adopt IGS scheme for transmission that represents a general signaling scheme compared with the conventional scheme, proper Gaussian signaling (PGS). Firstly, we express the achievable rate of multiple-input and multiple-output (MIMO) system suffering from various HWIs employing PGS and IGS schemes, when the aggregate effect of HWI is modeled as IGS. Moreover, we tune the transmit IGS statistical characteristics to maximize the achievable rate for HWI-SIMO system with two receiver combining schemes. Then, we propose an adaptive scheme to switch between maximal IGS and PGS schemes under certain conditions to improve the system performance with least computational/optimization overhead. Finally, we validate the analytic expressions through numerical and simulation results and quantify the gain reaped from adopting IGS scheme compared with PGS scheme.
Original languageEnglish (US)
Pages (from-to)1593-1606
Number of pages14
JournalIEEE Transactions on Vehicular Technology
Volume68
Issue number2
DOIs
StatePublished - Dec 19 2018

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