Toward Dual-functional Radar-Communication Systems: Optimal Waveform Design

We focus on a dual-functional multi-input-multi-output (MIMO) radar-communication (RadCom) system, where a single transmitter with multiple antennas communicates with downlink cellular users and detects radar targets simultaneously. Several design criteria are considered for minimizing the downlink...

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Bibliographic Details
Published in:IEEE transactions on signal processing Vol. 66; no. 16; pp. 4264 - 4279
Main Authors: Liu, Fan, Zhou, Longfei, Masouros, Christos, Li, Ang, Luo, Wu, Petropulu, Athina
Format: Journal Article
Language:English
Published: IEEE 15.08.2018
Subjects:
Downlink
global minimizer
Interference
MIMO radar
multi-user interference
non-convex optimization
Optimization
Radar antennas
radar-communication
Signal processing algorithms
Spectrum sharing
ISSN:1053-587X, 1941-0476
Online Access:Get full text
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Summary:We focus on a dual-functional multi-input-multi-output (MIMO) radar-communication (RadCom) system, where a single transmitter with multiple antennas communicates with downlink cellular users and detects radar targets simultaneously. Several design criteria are considered for minimizing the downlink multiuser interference. First, we consider both omnidirectional and directional beampattern design problems, where the closed-form globally optimal solutions are obtained. Based on the derived waveforms, we further consider weighted optimizations targeting a flexible tradeoff between radar and communications performance and introduce low-complexity algorithms. Moreover, to address the more practical constant modulus waveform design problem, we propose a branch-and-bound algorithm that obtains a globally optimal solution, and derive its worst-case complexity as function of the maximum iteration number. Finally, we assess the effectiveness of the proposed waveform design approaches via numerical results.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2018.2847648