Adaptive beamforming algorithm for subarrays based on coprime array

This paper proposes an adaptive beamforming algorithm based on the subarray technology of coprime array to avoid the occurrence of grating lobes and reduce complexity, in response to the problem of excessive data and computational complexity in processing large array antennas. Firstly, this paper divides the number of subarrays based on the number of elements in the coprime array; Subsequently, weighted compensation is performed within the subarray to compensate for the delay of the internal elements relative to the reference elements; Finally, subarray weighting is performed to enhance the output performance of the sampled signals. Compared with previous works, the proposed algorithm greatly reduces the computational complexity while improving the output performance of the adaptive beamformer at high signal-to-noise ratio. The validity and reliability of the proposed algorithm is verified through simulation experiments.