CAJ | 학술논문

基于期望信号波达方向信息的自适应波束合成算法对角度误差非常敏感，特别是在期望信号功率较大情况下，产生“自零陷”而导致算法失效。基于恒模特性的盲自适应波束合成在干扰信号功率大于期望信号功率时，算法也会把期望信号抑制以捕获干扰信号。在期望信号波达方向信息已知情况下，采用最小二乘恒模自适应波束合成算法，可以克服上述问题，使得期望信号在大动态时也能正常实现对干扰信号的抑制。本文阐述了算法实现步骤，并通过线阵模型进行仿真验证，证明算法的正确性。
기우기망신호파체방향신식적자괄응파속합성산법대각도오차비상민감，특별시재기망신호공솔교대정황하，산생“자령함”이도치산법실효。기우항모특성적맹자괄응파속합성재간우신호공솔대우기망신호공솔시，산법야회파기망신호억제이포획간우신호。재기망신호파체방향신식이지정황하，채용최소이승항모자괄응파속합성산법，가이극복상술문제，사득기망신호재대동태시야능정상실현대간우신호적억제。본문천술료산법실현보취，병통과선진모형진행방진험증，증명산법적정학성。
The performance of the adaptive beamforming is vulnerable to the DOA mismatch ,especially in the case that the power of the desired signal is large enough compared with the interference .This phe‐nomenon is called“self‐nulling” .In addition ,the desired signal is mitigated and the beamformer catches the interference whose power is larger when the blind beamforming algorithm is employed based on the constant module property .A new beamforming algorithm is presented so that beamformer could work well even if the dynamic range of the interest signal is considerably large .In the new deployment ,the DOA information and constant module property of the desired signal are both used .The implementation of the proposed algorithm is presented and the array gain is analyzed .Simulation results show that the main lobe of the array antenna is steered to the desired signal and the interferences are suppressed in the the assumed condition .