摘要
分别对几种波束形成方法进行了讨论,其中重点讨论了采用数字内插与混合波束形成结合的多波束形成方法,并通过对几种波束形成的研究对比,以及各种参数的变化对波束形成质量的影响比较,来找到各种波束形成方法的优缺点及适用范围。对于数字波束形成来说,要达到一定精度就需要一定高度的采样率,而高的采样率会带来ADC和输入数据传输及存储器等硬件要求的提高和成本的增加。数字内插的使用,则可以在不提高输入信号采样频率的条件下,保证波束形成足够的精度。
A technology of digital interpolating method combined with time delay - phase shift mixed beamforming method was discussed in this article. It emphasized the method＇s theories and applicable ranges. To the digital beamforming method, it needs a bigger sampling rate if it want to get a defmite precision. But the high sampling rate brings more higher demand of hardwares of ADC, inpute data＇ s transmission, memorizer etc., and it also adds cost. So, the technology that mixed digital interpolate method with time delay - phase shift mixed beamforming method can ensure the precision of beamforming that do not have to increase signal sampling rate.
出处
《信息技术》
2005年第9期85-87,共3页
Information Technology
关键词
波束形成
信号处理
波束图
beam- forming
signal processing
beam plot
