Transmit BeampattarnOptimization for Automotive MIMO Radar Coexistedwith Communication in V2V Networks

Abstract

Due to the flourishing development of vehicle-to-vehicle (V2V) communications and autonomous driving, interference between radar sensing and communication signals becomes a challenging issue. We propose a transmit beamforming based spectrum sharing scheme to achieve peaceful coexistence between automotive multiple-input multiple-out (MIMO) radar and communication systems. Our objective is to maximize the signal-to-interference-plus-noise ratio (SINR) of the automotive radar receiver subject to the communication capacity and the transmitted power budget constraints to optimize both the communication covariance matrix and the radar transmit precoder. The formulated optimization problem is non-convex, which is converted to convex by introducing a new slack variable and then solving it using the block coordinate descent, also called alternation optimization, approach. Additionally, the ellipsoid sub-gradient method is then employed to reduce the computational complexity. Simulation results demonstrate that our proposed scheme outperforms the conventional schemes.

Radio Sensing Using 5G Signals: Concepts, State of the Art, and Challenges

“…If they co-exist or co-design with each other, the radar sensing part of the joint system still uses radar waveforms for sensing and mutual interference between radar and communications exists. This can be mitigated via beamforming [31] - [33] or null space projection [34]. If they integrate with each other, dual-functional [35] or duplexed waveforms [29], [30] are often used, which require changes to the 5G systems.…”

Joint Bi-Static Radar and Communications Designs for Intelligent Transportation

“…Radar and communications can also share certain information for cooperation. For instance, [11] - [13] optimized communications and radar subject to constraints from radar and communications, respectively. Another important method is null space projection, where the radar signal was projected onto the null space of the interference channel to avoid interference [14].…”