【摘要】 提出了一种适用于FDD无线通信系统的变步长智能天线下行发射波束跟踪算法。该算法利用闭环功率控制的反馈信息,可自适应地跟踪移动台方位角的变化。算法不需要专门的探测信号,不需要求解信道协方差矩阵,复杂度很低。还分析了功率控制步长对用户方位角跟踪误差的影响。与其它方法相比,新方法具有更小的跟踪误差及更快的收敛速度。更多还原

【Abstract】 A downlink transmit beam tracking algorithm with variable step-size was proposed for FDD wireless communication systems. With the closed-loop power control, the transmit beam adaptively tracked the direction of a mobile terminal. The algorithm required neither a dedicated message feedback nor a complex computation, providing a low complexity solution. The tracking error effect due to the power control step-size was analyzed. In comparison to other methods, the proposed algorithm gives a smaller tracking error and a faster tracking speed. Simulation results illustrate the effectiveness and improvements of the proposed algorithm.更多还原