摘要
提出了一种基于分数阶功率谱的宽带双基地MIMO雷达中参数联合估计的新方法。在许多情况下,根据窄带信号模型对宽带回波信号中的参数进行估计是不合适的,因此提出一个新的宽带回波信号模型对运动目标参数进行估计。根据分数阶功率谱(FPSD)的峰值点对多普勒频移因子和时延参数进行联合估计,并依据分数阶功率谱的峰值点构造2个子阵,提出的FPSD-MUSIC算法和FPSD-ESPRIT算法实现了对收发角的联合估计。接下来推导了该信号模型中参数估计的克拉美罗界。仿真实验验证了算法的有效性。
A novel algorithm to jointly estimate parameters based on the fractional power spectrum density （FPSD） was proposed in wideband bistatic MIMO radar system. In many applications, it is not appropriate to approximate the wide- band signal by the narrowband model, so a novel wideband signal model was proposed to accurately estimate parameters of moving targets. Doppler stretch and time delay are estimated by searching the peak of the fractional power spectrum density （FPSD）. Two subarrays are constructed based on the peak of the FPSD. Both direction of departures （DOD） and direction of arrivals （DOA） of the multiple targets are jointly estimated by employing the FPSD-MUSIC algorithm and FPSD-ESPRIT algorithm. Furthermore, the cramer-rao bound （CRB） for target parameters estimation of wideband signal model was derived. Simulation results are presented to verify the effectiveness of the proposed method.
出处
《通信学报》
EI
CSCD
北大核心
2014年第6期192-199,共8页
Journal on Communications
