数字反副瓣对消器是70年末期提出来的新型抗干扰课题。它的原理与中频模拟反副瓣原理是相似的,其差别在于,前者是用数字技术。采用“流水”的方法求出加权因子,最后实现数字相消,从而达到抗干扰的目的。数字反副瓣分成开开环与闭环两种,其主要差别在于形成加权因子所用的输入量不同。闭环加权因子是用误差电压与副路输入电压相乘采用最小均方估计(LMS)算法, Digital anti-lobe canceller is a new type of anti-jamming task put forward in the late 1970s. Its principle and the intermediate frequency analog anti-flap principle is similar, the difference is that the former is the use of digital technology. Adopting the “flowing water” method to calculate the weighting factor, and finally realizing the digital cancellation, so as to achieve the purpose of anti-interference. Digital anti-flap into the open-loop and closed-loop two, the main difference is that the formation of weighting factors used in different input. The closed-loop weighting factor is obtained by multiplying the error voltage with the voltage of the secondary input by the least mean square estimation (LMS)