摘要
自适应天线接收通道间的幅相不一致会其以抑制干扰的零点深度变浅、方向图副瓣电平升高,严重影响自适应天线的抗干扰性能,因此在其工作之前必须对其各通道的幅度和相位特性进行均衡。提出了一种基于变步长最小均方算法(LMS)的自适应通道均衡技术,并给出了其现场可编程门阵列(FPGA)实现方案,仿真结果表明,该方案可以在很宽的频率范围内获得高均衡精度,可以为提高宽带自适应天线系统的抗干扰性能提供参考和借鉴。
Mismatch of amplitude and phase in adaptive antenna receiving channels would result in worse cancellation of interference and high beam pattern sidelobe level,thus severely influencing the antijamming performance of the adaptive antenna,so it is necessary to calibrate the amplitude and phase character before its working.An adaptive channel equivalence technique based on variable step size LMS algorithm is proposed,and a Field-Programmable Gate Array（FPGA） implementation scheme of a channel equivalence is presented.The simulation results show that the scheme proposed in this paper could achieve high calibration precision in broad frequency range and provide a reference for improving the antijamming performance of broadband adaptive antenna system.
出处
《通信技术》
2011年第1期19-21,共3页
Communications Technology
