CAJ | 학술논문

针对2维DOA估计问题，该文提出一种基于压缩感知(CS)的宽频段2维DOA估计算法，能够同时得到多个窄带信号的中心频率、方位角和俯仰角。首先利用方位向和俯仰向的空间频率分别建立过完备稀疏字典，然后通过对阵列接收数据的压缩采样得到空间频率的高分辨估计，最后通过空域滤波实现中心频率、方位角和俯仰角之间的匹配。理论分析表明，该算法具有较高的估计精度与分辨力，对信噪比(SNR)要求不高，无需多维搜索过程，且经过压缩采样降低了运算量。仿真结果验证了算法的正确性与有效性。
침대2유DOA고계문제，해문제출일충기우압축감지(CS)적관빈단2유DOA고계산법，능구동시득도다개착대신호적중심빈솔、방위각화부앙각。수선이용방위향화부앙향적공간빈솔분별건립과완비희소자전，연후통과대진렬접수수거적압축채양득도공간빈솔적고분변고계，최후통과공역려파실현중심빈솔、방위각화부앙각지간적필배。이론분석표명，해산법구유교고적고계정도여분변력，대신조비(SNR)요구불고，무수다유수색과정，차경과압축채양강저료운산량。방진결과험증료산법적정학성여유효성。
For the problem of two Dimensional Direction Of Arrival (2-D DOA) estimation, a broadband 2-D DOA algorithm is proposed based on the Compressed Sensing (CS). It can obtain the center frequency, azimuth angle and pitch angle of multiple narrowband signal. Firstly, an overcomplete sparse dictionary is established using the space frequency of azimuth and pitch. Then the high resolution estimation of space frequency is achieved with the compressed sampling array receiving data. Finally, the spatial filtering is used to realize the match of center frequency, azimuth angle and pitch angle. Theoretical analysis shows that the proposed algorithm has a higher estimation precision and lower SNR threshold without multidimensional search process. It reduces the computation by compressed sampling and the simulation results verify the effectiveness and correctness.