【摘要】 提出了一种通用数字DS/D-MPSK调制和解扩解调器的实现方案。该方案采用了成型滤波、直接数字合成(DDS)、正交调制、数字匹配滤波和延时差分解调等技术,直接在中频上进行数字信号处理,不需要进行数字下变频,也不需要进行伪随机码同步捕获和载波提取,简单易行,具有一定的新意和较高的实用价值。本方案已经应用于某军用超短波电台中,验证了方案的正确性和可行性。更多还原

【Abstract】 A realization scheme for universal digital DS/DMPSK modem is presented,which adopts several advanced technique such as Root-raised cosine filter,direct digital frequency synthesis,quadrature modulation,digital matched filter and delay difference demodulation.It processes the signal directly on middle frequency,and doesn′t need digital down conversion,PN code synchronization and carrier recovery.This scheme has been used in a military ultrashort wave radio and obtained a good effect.更多还原