Achieving the Optimal Transceiver Beamforming for Multi-User and Multi-Target DFRC System

Yao Liu, Jizhe Zhou, Ying Du, Kaifeng Han, Jiamo Jiang, Weidong Wang, Li Chen
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引用次数: 2

Abstract

As an effective way to realize the integrated sensing and communication for 6G, the dual-functional radar-communication (DFRC) has been studied to implement dual-functional system that simultaneously perform wireless communication and radar sensing. One of the fundamental design issues in DFRC focuses on waveform design, including the selection of basic waveform (e.g., Orthogonal Time Frequency Space (OTFS) or Orthogonal Frequency Division Multiplexing (OFDM)), and the optimal beamforming design. In this paper, we investigate the transceiver beamforming design for a multi-input-multi-output (MIMO) DFRC system, where the dual functional base station (BS) simultaneously detects the multiple targets while communicating with multiple communication users. To this end, we first characterize the multi-fold tradeoffs between communication and radar sensing by defining an achievable performance region of the proposed DFRC system. The performance of communication and radar sensing are characterized by their signal-to-interference-plus-noise ratios (SINRs), and then the multi-objective optimization problem is formulated to maximize the SINRs of all communication users and radar sensing echoes (from targets) via optimizing beamforming matrix. To solve the problem, we propose a poly-complexity solution by using the quadratic transform and successive convex approximation. Simulation results are provided to verify the proposed design.
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实现多用户多目标DFRC系统的最佳收发波束形成
作为实现6G传感与通信一体化的有效途径,研究了双功能雷达通信(DFRC),以实现同时进行无线通信和雷达传感的双功能系统。DFRC的基本设计问题之一是波形设计,包括基本波形的选择(如正交时频空间(OTFS)或正交频分复用(OFDM))和最佳波束形成设计。本文研究了多输入多输出(MIMO) DFRC系统中双功能基站(BS)在与多个通信用户通信的同时检测多个目标的收发器波束形成设计。为此,我们首先通过定义提议的DFRC系统的可实现性能区域来表征通信和雷达传感之间的多重权衡。以通信和雷达感知性能的信噪比(SINRs)为特征,通过优化波束形成矩阵,构造多目标优化问题,使所有通信用户和雷达感知回波(来自目标)的信噪比(SINRs)最大化。为了解决这个问题,我们利用二次变换和连续凸逼近提出了一个多复杂度解。仿真结果验证了所提出的设计。
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