Energy-Efficient Time-Modulated Beam-Forming for Joint Communication-Radar Systems
IEEE TRANSACTIONS ON GREEN COMMUNICATIONS AND NETWORKING(2023)
摘要
To alleviate the shortage of spectral resources as well as to reduce the weight, volume, and power consumption of wireless systems, joint communication-radar (JCR) systems have become a focus of interest in both civil and military fields. JCR systems based on time-modulated arrays (TMAs) constitute an attractive solution as a benefit of their high degree of beam steering freedom, low cost, and high accuracy. However, their sideband radiation results in energy loss, which is an inherent drawback. Hence the energy-efficiency optimization of TMA-based JCR systems is of salient importance, but most of the existing TMA energy-efficiency optimization methods do not apply to JCR systems. To circumvent their problems, a single-sideband structure is designed for flexibly reconfigurable energy-efficient TMA beam steering. First, some preliminaries on single-sideband TMAs are introduced. Then, a closed-form expression is derived for characterizing the energy efficiency. Finally, the theoretical results are validated by simulations.
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关键词
Radar,Amplitude modulation,Harmonic analysis,Periodic structures,Beam steering,Antenna arrays,Closed-form solutions,Energy efficiency,Array signal processing,Optimization methods,Joint communication-radar system,time-modulated array,energy-efficiency optimization,beamforming
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