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Joint Range and Angle Estimation Based on Sub-Array Scheme with Frequency Diverse Array Radar

Ling Huang 1,2, Xiang Li 3, and Zhiming He 1
1. College of Electronic Engineering, University of Electronic Science and Technology, Chengdu, China
2. College of Electronic and Information Engineering, Lanzhou University of Technology, Lanzhou, China
3. School of Communication and Information Engineering, University of Electronic Science and Technology, Chengdu, China
Abstract—Frequency Diverse Array (FDA) has its unique advantage in realizing Low Probability of Intercept (LPI) technology for its beam pattern is related to the range, time and angle. In this paper, a sub-array scheme of range-angle joint estimation of a target for Frequency Diverse Array (FDA) radar is proposed. To solve the problem of distance and angle response coupling of basic ULA FDA radar, the entire array is divided into two sub-arrays, which employs two different frequency offsets. For aperture extension, each sub-array adopts 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 is used. Therefore, the targets range and angle can be estimated directly with the subspace-based multiple signal classification algorithms. The estimation performance is examined by analyzing the Cramer-Rao Lower Bound (CRLB) versus Signal-to-Noise Ratio (SNR). Simulation results show that the proposed approach is effective to realize the joint range and angle estimation of FDA.
 
Index Terms—Frequency Diverse Array (FDA), range-angle estimation, difference co-array, Cramer-Rao Lower Bound (CRLB)

Cite: Ling Huang, Xiang Li, and Zhiming He, "Joint Range and Angle Estimation Based on Sub-Array Scheme with Frequency Diverse Array Radar," International Journal of Electronics and Electrical Engineering, Vol. 5, No. 1, pp. 30-34, February 2017. doi: 10.18178/ijeee.5.1.30-34
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