天线阵列对多波束信号的接收与处理的改进算法及优化

Improved Arithmetic and Optimization of the Receiving and Processing of Multibeam Signals

主要讨论了天线阵列在产生多波束方面的研究工作,对于多个方向上来的信号,若不考虑背景噪声,只要阵元数大于所要接收的信号数,就可以无失真地对恢复各个信号,一个阵列要发射独立的6个波束,或者等效地独立接收6个不同方向的信号,需要6组权值,分别产生6组单波束,将其叠加。由于单波束的主瓣宽度等影响,6个单波束之间的互相影响很严重,为此设计了与现有方法不同的方法来优化加权值,取得了很好的效果。在研究的过程中,发现单纯地形成零点并不一定能够取得很好的效果,波束与波束之间的影响是由于在主瓣的位置上有其他波束旁瓣造成的,形成零点并不能降低旁瓣的影响,为此定义了互增益这一新的参数,以此来衡量波束与波束之间的影响,相比已有算法更为有效。并通过在MATLAB下仿真证明了这些观点。

The paper mainly discussed how antenna array can produce multi-beam signals. If we don＇ t take background noise into account, as to the signals from several directions, only if the number of the array elements is greater than the number of signals needing receiving, we can recover every signal without distortion. If an array needs to send six beams respectively or receive signals respectively from six directions, we need six sets of value to produce six single-beam signals respectively and then superimpose them. Because the interaction of the six single-beam signals is worse, we design a way much different from the present ways to op- timize the weighted value and make a great success. In the process of research, we find that single zero won＇ t get good effect. The interaction between beams is produced because there is side lobe from other beams on the position of main lobe. Producing zero won＇ t lower the effect of side lobe. So we define some useful parameters to judge the interaction between beams . Comparing with old arithmetic , this method is more efficiency . We also use MATLAB to prove our viewpoints.