Abstract

This paper investigates the problem of low probability of intercept-based optimal power allocation (LPI-OPA) for an integrated multistatic radar and communication system, which consists of multiple transmitters operating at different frequencies, a radar receiver, and a communication receiver (CR). The integrated multistatic radar and communication system is capable of fulfilling the requirements of both radar and communication subsystems. The key tenet of the integrated system is to minimize the total power consumption by optimizing the transmit power allocation at each transmitter for radar waveforms and information signals, which is constrained by a predetermined target detection performance for the RR and a desired information rate for the CR. Since the analytical closed-form expression of the probability of detection is not tractable, its upper bound is derived. We analytically show that the resulting optimization problem can be reformulated as two subproblems, which can be solved by an efficient solution procedure based on the approach of linear programming and the Karush–Kuhn–Tuckers optimality conditions. Simulation results are provided to show that the LPI performance of the integrated multistatic radar and communication system can significantly be enhanced by employing our proposed LPI-OPA scheme.

Highlights

  • 3) We analytically show that the resulting low probability of intercept-based optimal power allocation (LPI-OPA) optimization scheme can be reformulated as two subproblems, which can be solved by an efficient solution procedure based on the method of linear programming and the Karush–Kuhn–Tuckers (KKT) optimality conditions [28], [29]

  • Remark 1: In the current paper, we focus on the problem of low probability of intercept (LPI)-based PA for an integrated multistatic radar and communication system, where the total radiated power is minimized by optimizing the transmit PA at each transmitter for radar waveforms and information signals

  • Speaking, the LPI-OPA scheme for an integrated multistatic radar and communication system can be formulated as a problem of optimizing the transmit PA to minimize the total power consumption of the integrated system for both radar waveforms and information signals, respectively, subject to a predetermined target detection performance for the RR and a desired information rate for the communication receiver (CR)

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Summary

Background and Motivation

R ECENTLY, the urgent need for faster communications and the rapid development of commercial multimedia applications have result in an increasing demand for radio frequency (RF) bandwidth [1]. There are several similarities between the two RF functionalities, which makes the integrated design of radar and communication systems much more plausible Speaking, this integrated radar and communication system can share the hardware and RF spectrum to achieve simultaneously both radar target detection and information transferring. The vast majority of existing works concentrate on techniques to optimize the performance of radar target detection/tracking and communication rate for the integrated radar and communication system, without paying much attention to the problem of low probability of intercept (LPI). In this paper, we will extend the results in [12], [15], and [26] and propose an LPI-OPA strategy for an integrated multistatic radar and communication system These aspects render this model attractive for offence applications, where the loader of the system needs to achieve LPI performance

Main Contributions
Organization
SYSTEM MODEL
Basis of the Technique
GLRT Detector
LPI-OPA Model
Numerical Setup
Numerical Analysis
CONCLUSION
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