This paper proposes an angle measurement algorithm based on the digital beamforming(DBF)for the horizontal azimuth measurement of the airborne traffic collision avoidance system(TCAS).Based on the traffic antenna array layout used for the airborne TCAS,the mathematical expression of the phase difference in the receiving channel is summarized;based on the DBF,a hori zontal azimuth measurement algorithm process is explained,and a simplified algorithm is given to further reduce the amount of calculation and facilitate engineering implementation;the algorithm is simulated and verified,and the simulation results show that the algorithm can achieve better angle measurement performance than conventional phase comparison algorithms in multi-target situa-tions.
维普
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