The FFT is a matchfilter for sinusoid signal, and the band width of the matchfilter will decrease with increase in integrated time .
FFT对于正弦信号而言是匹配滤波器,随着积累时间的增加匹配滤波器的带宽会随之减少。
2
Square-root raised cosine roll-off digital filter was widely applied to baseband shaping filter and matchfilter in modern digital communication.
现代数字通信中广泛采用平方根升余弦滚降数字滤波器作为基带成形滤波器和匹配滤波器。
3
According to laser radar echo characteristic, the difference filter and the matchfilter were adopted. As a result, the SNR is advanced about 1.5 times.