CAJ | 학술논문

为有效克服导向矢量失配误差对自适应波束形成器的影响，提出了一种基于约束同时扰动随机逼近算法的鲁棒自适应波束形成算法。该算法对波束形成器的幅度响应进行约束，运用约束同时扰动随机逼近算法对权矢量进行优化，算法只需要对阵列输出功率进行测量，无需知道接收数据协方差矩阵，可适用于低成本的单通道接收系统。此外，该算法能很好地处理非凸的优化问题，无需将其转化为凸优化问题，能够自由控制鲁棒响应区的波束宽度和纹波水平，理论上可适用于任意阵型。仿真结果验证了算法的正确性和有效性。
위유효극복도향시량실배오차대자괄응파속형성기적영향，제출료일충기우약속동시우동수궤핍근산법적로봉자괄응파속형성산법。해산법대파속형성기적폭도향응진행약속，운용약속동시우동수궤핍근산법대권시량진행우화，산법지수요대진렬수출공솔진행측량，무수지도접수수거협방차구진，가괄용우저성본적단통도접수계통。차외，해산법능흔호지처리비철적우화문제，무수장기전화위철우화문제，능구자유공제로봉향응구적파속관도화문파수평，이론상가괄용우임의진형。방진결과험증료산법적정학성화유효성。
To overcome effectively the influence of steering vector mismatch on the performance of adaptive beamformer,a robust adaptive beamformer based on the constrained simultaneous perturbation stochastic approximation ( SPSA) algorithm is proposed .The magnitude response constraints are used in the proposed method,and the constrained SPSA algorithm is used to solve the optimal weight vector .The proposed approach just need the measurements of the output power of the array antenna,and does not need the received signal covariance matrix,so it is very suitable for the low cost single-channel receiver .Moreover,the proposed approach is able to solve the non-convex optimization problem,and does not convert it to a convex optimization problem .It is also able to flexibly control the robust response region beamwidth and response ripple for antenna arrays with arbitrary geometry .The simulation results verify the correctness and effectiveness of the proposed approach .