Approach to the lower spurs and complex LFM based on FPGA and NCO
Peikang Huang · Systems engineering and electronics · 2006
A method is presented for using field programmable gate array(FPGA) and numerical control oscillator(NCO) to approach a lower spurs and complex linear frequency modulation(LFM).It described the relationship between direct digital synthesize(DDS) spurs and D/A converter digits which is based on noise floor and spurs analyzing,and achieved a lower spurs and complex LFM via a date interface,timer sequence distribution and two phase accumulations in FPGA.It improved the quality and adaptability for baseband signal in radar and communication system.