Enhanced dual lane detection in automotive radar systems using harmonic coordinated beamforming of time-modulated arrays

This paper introduces an advanced beamforming methodology for time-modulated arrays by leveraging harmonic coordination. The proposed approach assigns complex beams to designated angular ranges and synthesizes distinct harmonic beams to achieve sophisticated beamforming. Furthermore, this study introduces two innovative structural models, namely the parallel and cascade structures, to amplify the degree of freedom for harmonics in the frequency domain. Through rigorous derivations and comprehensive simulations, the efficacy of the proposed methodology is demonstrated. The results reveal that the harmonic coordination approach outperforms conventional methods in synthesizing optimal beam patterns, thereby enhancing the efficacy of different detection states in automotive radar systems.