Realization of a Universal Low-cost IF Digitalization Scheme
Wu Yi · Telecommunication Engineering · 2010
According to the low-cost requirement of assembling V/UHF Radio,a low-cost IF digitalization scheme is proposed in this paper. The low-effictive FPGA-XC3S4000 produced by Xilnx,Inc.,digital upconverter(DAC) AD9857 and DAC AD9235-40 produced by AD,Inc., are used in this hard platform. AM and FM analog signal,MSK digital signal modulation and demodulation algorithms are accomplished based on this platform. The demodulated SINAD of AM and FM satisfies the demand of module and system,as well as the bit error ratio(BER) of MSK.The platform is provided with universality and can be used to realize other IF digitalization algorithms when IF frequency is blow 40 MHz. The other modulation and demodulation schemes can be realized on this platform only by modifying software.