HAP通信中环形波束的实现及优化

摘要

In HAP ( High Altitude Platform) communication system, platform rotation would cause frequent handoff of massive uses in a short time, thus seriously deteriorating communication quality. An effective method to solve the problem is to use ring cells instead of honey cells. Vertical antenna array, as a realiza-tion of the ring beam, is studied, the directional diagram and gain model of the array is established, and its realization mechanism of ring beam also analyzed. In light of this, a side-lobe suppression technique is introduced to optimize the beam shape, thus greatly reducing the interference of among the cells. Computer simulation verifies the validity of the proposed method.%在高空平台通信系统中，平台的旋转摄动会造成短时间内大量用户的频繁切换，严重影响系统通信质量。而利用环形小区替代传统的蜂窝小区能够有效解决这一问题。针对环形波束的一种实现方式-垂向阵列-进行了研究，建立了垂向阵列的方向图及增益模型，分析了其实现环形波束的机理，在此基础上采用旁瓣抑制技术对其波束进行了优化，大大降低了小区间的干扰，计算机仿真结果验证了方法的有效性。