Dot-shaped beamforming analysis of subarray-based sin-FDA  

基于子阵sin-FDA的点状波束形成研究（英文）

作　　者：Bo WANG Jun-wei XIE Jing ZHANG Jia-ang GE 

机构地区：[1]Air and Missile Defense College,Air Force Engineering University,Xi'an 710051,China [2]Shaanxi Vocational and Technical College of Transport,Xi'an 710018,China

出　　处：《Frontiers of Information Technology & Electronic Engineering》2019年第10期1429-1444,共16页信息与电子工程前沿（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(No.61503408)。

摘　　要：Phased array (PA) radar is one of the most popular types of radar. In contrast to PA, the frequency diverse array (FDA) is a potential solution to suppress range-related interference because of its time-range-angle-dependent beampattern. However, the range-angle coupling inherent in the FDA transmit beampattern may degrade the output signal-to-interference-plus-noise ratio (SINR). We propose a dot-shaped beamforming method based on the analyzed four subarray-based FDAs and subarray-based planar FDAs using a sinusoidally increasing frequency offset with elements transmitting at multiple frequencies. The numerical results show that the proposed approach outperforms the existing log-FDA with logarithmical frequency offset in transmit energy focus, sidelobe suppression, and array resolution. Comparative simulation results validate the effectiveness of the proposed method.Phased array(PA) radar is one of the most popular types of radar. In contrast to PA, the frequency diverse array(FDA) is a potential solution to suppress range-related interference because of its time-range-angle-dependent beampattern. However, the range-angle coupling inherent in the FDA transmit beampattern may degrade the output signal-to-interference-plus-noise ratio(SINR). We propose a dot-shaped beamforming method based on the analyzed four subarray-based FDAs and subarray-based planar FDAs using a sinusoidally increasing frequency offset with elements transmitting at multiple frequencies. The numerical results show that the proposed approach outperforms the existing log-FDA with logarithmical frequency offset in transmit energy focus, sidelobe suppression, and array resolution. Comparative simulation results validate the effectiveness of the proposed method.

关 键 词：FREQUENCY diverse ARRAY Subarray-based FREQUENCY diverse ARRAY Decoupling Dot-shaped beamforming 

分 类 号：TN973.21[电子电信—信号与信息处理]