Design and implementation of signal generator based on software radio

In order to build an adaptable the radio signal generator which is maintained and upgraded easily, hardware architecture based on software radio is presented. The structure of the DSP+FPGA+DDS core plays their respective advantages of programming and processing chip of DSP and FPGA, and generates flexibly different base- band signal sources with the method of the software. To make the system meet the requirements of broadband signal source, the high-speed and reliable Transmission of data streams are implemented by data cache accesses with the use of dual-clock FIFO. The system is tested by the hardware platform and the results show that: In the case of the data transmission without errors, the maximum transmission rate of data channel of the signal generator is 87.5MBps.