一种多周期变步长分布式发射波束成形方案

A Multi-Period Variable Step-Size Distributed Beamforming Scheme

针对传统分布式发射波束成形方案调整速度慢、系统复杂度高的缺点,提出了一种全新的多周期变步长调整方案。通过不断减小每一相位调整周期的步长,来逐步弱化各个节点相位与期望值之间的差距,使接收端收到的信号强度能以更快的速度达到最大。仿真结果验证了变步长方案的可行性,在同等条件下,变步长方案较传统方案相比能以更快的收敛速度实现相位对齐,使接收端同时获得阵列增益和分集增益。同时变步长方案也为循环优化问题提供了一种新的思路。

Aiming at the disadvantages of slow adjustment speed and high system complexity of traditional distributed beamforming schemes, a new multi-period variable step size adjustment scheme is proposed. By continuously reducing the step size of each phase adjustment cycle, the gap between the phase of each node and the expected value was gradually weakened, so that the signal intensity received by the receiver can reach the maximum at a faster speed. The simulation results verify the feasibility of the variable step size scheme. Under the same conditions, the variable step size scheme can achieve phase alignment faster than the traditional scheme, so that the receiver can obtain both array gain and diversity gain. At the same time, the variable step size scheme also provides a new way of thinking for the cyclic optimization problem.