Fundamental Limits on Detection With a Dual-function Radar Communication System

TL;DR

This paper explores the fundamental detection limits of dual-function MIMO RadCom systems, deriving optimal waveforms and highlighting the importance of waveform coherence and angle separation for detection performance.

Contribution

It provides closed-form expressions for maximum detection probability and identifies key factors affecting detection in dual-function radar-communication systems.

Findings

Coherent waveforms are optimal for detection performance.

Angle separation significantly impacts detection capability.

Derived explicit formulas for detection probability.

Abstract

This paper investigates the fundamental limits on the target detection performance with a dual-function multiple-input-multiple-output (MIMO) radar communication (RadCom) systems. By assuming the presence of a point-like target and a communication receiver, closed-form expressions for the maximum detection probability and the transmit waveforms achieving the optimal performance are derived. Results show that for the considered case, the dual-function system should transmit coherent waveforms to achieve the optimal detection performance. Moreover, the angle separation between the target and communication receiver has a great impact on the achievable detection performance.