例句與用法

1. Lfmcw radar adopts the receiver with the structure of “ homodyne - fourier ” , and acquires the range spectrum after its if signal is sampled , and then processed by ftt
   Lfmcw雷達(dá)采用了“差拍-傅立葉”接收機(jī)結(jié)構(gòu),其回波中頻信號(hào)經(jīng)數(shù)字采集后進(jìn)行fft處理,從而獲得雷達(dá)的距離譜。
2. Ftt makes the frequency sampled at a same frequency interval on unit circle , and the frequency interval limits the practical range - precision of the radar , and makes range precision at an equivalent level with range - resolution
   由于fft的實(shí)質(zhì)是頻率在單位圓上的等間隔采樣,其采樣間隔限制了雷達(dá)的實(shí)際測(cè)距精度,使得其測(cè)距精度與其距離分辨力處于同一量級(jí)。