CAJ | 학술논문

从空时自适应滤波技术出发,结合数字多波束天线实际应用,提出了一种改进的联合空时滤波算法,解决了当干扰信号与卫星信号空间角接近时,传统的空时滤波算法在抑制干扰信号的同时,极大衰减该卫星有用信号,从而降低了接收机抗干扰性能的问题.仿真和实测结果表明,在卫星信号与干扰信号夹角接近10o和多干扰信号存在的条件下,改进的联合空时滤波算法明显优于传统的空时滤波算法.
종공시자괄응려파기술출발,결합수자다파속천선실제응용,제출료일충개진적연합공시려파산법,해결료당간우신호여위성신호공간각접근시,전통적공시려파산법재억제간우신호적동시,겁대쇠감해위성유용신호,종이강저료접수궤항간우성능적문제.방진화실측결과표명,재위성신호여간우신호협각접근10o화다간우신호존재적조건하,개진적연합공시려파산법명현우우전통적공시려파산법.
Based on the space time adaptive processing technology and in combination with the practical application of digital multi-beam faggot antenna, an improved space time adaptive processing algorithm is put forward. The method is used to solve the problem—that is—traditional space time filtering algorithm can suppress jamming signals, but, at the same time, it can lead to attenuate the signals available of the satellite when the angle between jamming signal and satellite signal is close enough, so that this affects the anti-jamming capability of receiver. The simulation and actual results show the improved space time adaptive processing algorithm is better than the traditional method while the angle between satellite signal and jamming signal is close to 10 degrees and there exists jamming signals.