天线组阵频域合成方法最佳子带划分数分析

为定量分析天线组阵宽带信号频域合成方法中最佳的子带划分数,首先,介绍了频域合成方法并构建了宽带信号合成系统模型;然后,分析了点频信号条件下的合成性能;最后,通过在频域进行积分扩展，得到不同子带划分数条件下的合成损失理论公式。仿真结果表明,子带划分数越多,频域合成方法合成性能越高,但硬件开销越大。以合成损失与硬件开销为评估指标,最佳子带划分数为128。

Analysis on the optimal sub-band partition number in frequency domain combining for antenna arraying

In order to analyze the optimal sub-band partition number in frequency domain beamforming method for wideband signals of antenna arraying quantitatively, firstly, a frequency domain beamforming method is described, and the system model of wideband signal combining is established. Then, the influence on the combining performance under the condition of tone signals is analyzed. Finally, through integral extension in the frequency domain, the combining loss formula under the condition of different sub-band partition number is obtained. Simulation results show that the higher the sub-band partition number is, the better the combining performance of the frequency domain beamforming is, as well as the hardware cost. Taking the combining loss and hardware cost as the evaluation indicators, the optimal sub-band partition number is 128.