GPS接收机抗干扰自适应天线的设计

针对自适应算法实现过程中运算量大的问题,提出了数字与模拟相结合实现功率倒置自适应处理的方法。这种方法减小了数字信号处理部分的计算量,并为有用信号提供了一个独立的射频通道,提高了系统处理的实时性,而且降低了系统的复杂程度。通过实验验证了功率倒置阵的抗干扰特性,给出了在不同的角度上存在干扰信号时系统的稳态方向图的测试结果。与GPS接收机的对接测试表明,该自适应天线系统能大大提高接收机的抗干扰能力,而且易于对现有接收机进行升级。

Design of anti-jamming adaptive antennas for GPS receivers

Combining the analog and digital technologies,a new design method of the power-inversion adaptive array is described.Due to the new method,the performance of the system is improved while the structure is simplified.A power-inversion adaptive array system is designed and tested.Some array patterns that illustrate the anti-jamming performance of the system are obtained in the microwave anechoic chamber.An experiment is done on the adaptive array working with a GPS receiver,and the results are presented.