Method and device for generating large-bandwidth complex frequency sweeping interference signal based on FPGA (Field Programmable Gate Array)

The invention discloses a method and a device for generating a large-bandwidth complex frequency sweeping interference signal based on an FPGA (Field Programmable Gate Array). The method comprises the following steps: generating a sweep frequency modulation signal through a first-stage DDS based on a sweep frequency modulation parameter; generating a plurality of parallel phase control words according to the sweep frequency modulation signal; generating a plurality of parallel baseband signals through a plurality of secondary DDSs in a plurality of parallel channels based on the parallel phase control words; and generating a sweep frequency interference signal according to the plurality of parallel baseband signals. Compared with a traditional method in which mapping is carried out only through a one-stage DDS, the method provided by the invention has the advantages that the baseband signal of the sweep frequency interference signal is finally obtained through mapping of two stages of DDSs, and the complexity