雷达学报Issue(3)：253-261,9.DOI:10.3724/SP.J.1300.2012.20049
基于功率聚焦的宽带阵列信号检测算法
Wideband Array Signal Detection Algorithm Based on Power Focusing
摘要
Abstract
Aiming at the requirement of real-time signal detection in the passive surveillance system, a wideband array signal detection algorithm is proposed based on the concept of power focusing. By making use of the phase difference of the signal received by a uniform linear array, the algorithm makes the power of the received signal focused in the Direction Of Arrival (DOA) with improved cascade FFT. Subsequently, the probability density function of the output noise at each angle is derived. Furthermore, a Constant False Alarm Rate (CFAR) test statistic and the corresponding detection threshold are constructed. The theoretical probability of detection is also derived for different false alarm rate and Signal-to-Noise Ratio (SNR). The proposed algorithm is computationally efficient, and the detection process is independent of the prior information. Meanwhile, the results can act as the initial value for other algorithms with higher precision. Simulation results show that the proposed algorithm achieves good performance for weak signal detection.关键词
无源侦察/宽带阵列信号/恒虚警检测 (Constant False Alarm Rate, CFAR)/FFT/到达角 (Direction Of Arrival, DOA)Key words
Passive surveillance/Wideband array signal/Constant False Alarm Rate (CFAR)/FFT/Direction Of Arrival (DOA)分类
信息技术与安全科学引用本文复制引用
龚斌,王壮,程翥..基于功率聚焦的宽带阵列信号检测算法[J].雷达学报,2012,(3):253-261,9.基金项目
国家自然科学基金(11173068)资助课题 （11173068）
