Diversity‐multiplexing tradeoff in MIMO radars. Issue 4 (1st April 2017)

• Record Type: Journal Article
• Authors: Nazari Majd, Mohammad; Radmard, Mojtaba; Chitgarha, Mohammad Mahdi; Farina, Alfonso; Nayebi, Mohammad Mahdi; Bastani, Mohammad Hasan
• Is Part Of: IET radar, sonar & navigation. Volume 11:Issue 4(2017)
• Page Start: 691
• Page End: 700
• Publication Date: 2017-04-01
• Subjects: parameter estimation -- channel capacity -- space division multiplexing -- telecommunication network reliability -- diversity reception -- MIMO communication -- MIMO radar; diversity‐multiplexing tradeoff -- MIMO radars -- multiple‐input‐multiple‐output wireless communication systems -- spatial diversity gain -- spatial multiplexing gain -- MIMO channel capacity -- data rate -- target parameters estimation; Signal processing -- Periodicals; Radar -- Periodicals; Sonar -- Periodicals; Electronics in navigation -- Periodicals; Navigation -- Periodicals; 621.3848
• DOI: 10.1049/iet-rsn.2016.0278
• Languages: English
• ISSNs: 1751-8784

Abstract

Abstract : Two gains play key roles in recently developed multiple‐input–multiple‐output (MIMO) wireless communication systems: 'spatial diversity' gain and 'spatial multiplexing' gain. The diversity gain (DG) refers to the capability to decrease the error rate of the MIMO channel, whereas the multiplexing gain (MG) implicitly refers to the amount of increase in the capacity of the MIMO channel. It has been shown that there is a fundamental tradeoff between these two types of gains, meaning interplay between increasing reliability (via an increase in the DG) and increasing data rate (via an increase in the MG). On the other hand, recently, MIMO radars have attracted much attention for their superior ability to enhance the system's performance. As an MIMO system, it is expected that the mentioned diversity‐multiplexing tradeoff exists in an MIMO radar, too. In this study, first, these two gains are obtained in an MIMO radar system in a closed‐form solution. The authors have shown that the DG of an MIMO radar is directly related to its detection performance and the MG represents its capability in estimating the target's parameters. Finally, the tradeoff between these two gains in an MIMO radar is studied and verified theoretically and through simulations.