Frequency Diverse Array Radar for Range-Angle Estimation Based on Difference Co-array

doi:10.16182/j.issn1004731x.joss.201704025

Abstract

Abstract: Because of the coupling in range and angle responses, which could not estimate directly both the range and angle information of a target, a sub-array scheme of distance-angle joint estimation of a target for frequency diverse array (FDA) radar was proposed. The entire array was divided into two subarrays, which employed two different frequency offsets. For aperture extension, each subarray adopted difference co-array structure to provide O(N²)degrees of freedom by only N physical sensors when the second-order statistics of the received data was used. Therefore, the targets range and angle could be estimated directly with the subspace-based multiple signal classification algorithms for the decoupling capability of distance and angle dimensional. The estimation performance was examined by analyzing the Cramer-Rao lower bound (CRLB) versus signal-to-noise ratio (SNR). The effectiveness was verified by the numerical simulation results.

Key words: Frequency diverse array (FDA), range-angle estimation, difference co-array, Root-MUSIC, ESPRIT

CLC Number:

TN95

Huang Ling, He Zhiming, Li Xiang, Yang Fan. Frequency Diverse Array Radar for Range-Angle Estimation Based on Difference Co-array[J]. Journal of System Simulation, 2017, 29(4): 886-893.

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