Waveform design method for subarray-level wideband digital array radar based on joint space-frequency optimization

Abstract

The present invention discloses a method for designing a subarray-level broadband digital array radar waveform using joint space-frequency optimization. The method comprises the following steps: generating an array structure matrix based on the division of sub-phased arrays within the full array; constructing a full array waveform phase matrix represented by an inter-subarray waveform phase matrix and a phase shift weight vector of a phase shifter within the full array based on the array structure matrix; constructing an objective function that minimizes pattern deviation and power spectrum deviation; sequentially using the inter-subarray waveform phase matrix and the phase shift weight vector of the phase shifter within the full array as parameters to be determined, and using the conjugate gradient method to alternately optimize and solve the objective function to obtain the optimal inter-subarray waveform phase matrix and the optimal phase shift weight vector of the phase shifter within the full array; and designing an output radar waveform based on the optimal inter-subarray waveform phase matrix and the optimal phase shift weight vector of the phase shifter within the full array. The present invention realizes radar waveform design using subarrays, reducing array costs.

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