基于射频采样宽带数字阵列雷达波束形成

宽带数字波束形成技术是宽带数字阵列雷达系统的核心关键技术。然而目前的宽带数字波束形成方法大都存在计算量大、针对特定信号、工程实现复杂等缺点。结合宽带数字阵列雷达的特点与当前先进数字信号处理器件的特性，研究了一种基于射频直接采样的宽带数字波束形成方法。该方法具有计算量小、适用性好、具有较高工程可实现性等特点。计算仿真结果验证了该方法的有效性，并分析了信号带宽、ADC采样速率、采样率带宽比等参数对该方法性能的影响。

Wideband Digital Array Radar Beamforming Based on RF Direct Sampling

Wideband digital beamforming (WDBF) technology is a key technology of wideband digital array radar (WDAR) system. However, the existing WDBF methods almost have the defects of large computation costs, fitting to special signal, and complex engineering implementation. Combing the characteristics of WDAR and the performance of the current state- of- the- art digital signal processing devices, the article researches a WDBF method based on radio frequency (RF) direct sampling. The method has the advantages of less calculation, wide applicability, high engineering feasibility, and etc. The computer simulation results verify the effectiveness of the proposed method. The influences of various parameters such as signal bandwidth, ADC sampling rate, sampling rate to bandwidth ratio, are also analyzed.