基于单通道接收机的鲁棒自适应波束形成算法

Robust Adaptive Beamforming Based on Single Port Receiver

针对导向矢量失配误差导致自适应波束形成器性能下降和多通道接收机系统成本较高的问题,提出了基于单通道接收机的最差性能最优鲁棒Capon波束形成算法。该算法基于低成本的单通道接收机系统,仅对接收机输出功率进行测量,然后使用权微扰算法对协方差矩阵进行估计,并将问题转化为对最差性能最优的鲁棒Capon波束形成器进行导向矢量估计。仿真结果验证了算法的正确性和有效性,表明该基于单通道接收机的算法在大大降低系统成本的情况下,仍然可以达到与基于多通道接收阵列的鲁棒波束形成算法相当甚至更高的性能水平。

To effectively overcome the influence of steering vector mismatch on the performance of adaptive beamformer and high cost of the multiple port receiver,a robust Capon adaptive beamformer based on the single port receiver using worst-case performance optimization（RCB-SPR） is proposed in this paper.Based on the single port receiver,the proposed approach just need the measurements of the output power of the array antenna,and use the weight perturbation algorithm to estimate the covariance matrix.Then,the problem is reformulated as a steering vector estimating problem for the worst-case performance optimization based robust Capon beamformer.The simulation results verify the correctness and effectiveness of the proposed approach.It shows that based on the low cost single port receiver,the proposed RCB-SPR approach still can get a similar and even better performance than the robust beamforming methods that based on the multiple port receiver.