Design of Coherent Doppler Non-linear Frequency-modulation IF Signal Source Based on DDS
Hua Wang · Shipboard Electronic Countermeasure · 2010
This paper analyzes the design principle and method of non-linear frequency modulation IF signal source based on direct digital synthesis(DDS) with programmable coherent Doppler frequency,discusses the real-time calculating method of Doppler frequency control word and phase control word,and expatiates the frequency error and phase error of Doppler signal generated by the signal source.