Design and implementation of wide-band high-rate multi-mode signal generator

With the development of radio communication technology, more higher demands are proposed on signal fidelity, accuracy of frequency and stability of amplitude in order to improve the performance of communication system. As one of the most important measure instruments in lab and other researches, the performance of signal generator will directly affect the measurement results of communication system and design ideas. Therefore signal generator needs more functions and accurate measurements to meet higher standard requirements. This paper introduces a way to realize four kinds of modulation shift modes: sine wave, 2ASK, 2FSK and 2CPFSK based on DDS which is controlled by FPGA and a wide setting range of frequency and amplitude.