Radar Multi-Targets Real-Time Communication Based on Software Radio

According to the modern software radio principle, a programmable general-purpose platform is designed to realize radar multi-targets real-time communication. The receiver is designed based on wideband IF sampling architecture, and cascaded with two digital attenuators. C-band signal is transformed into IF signal through twice conversions. DSP, FPGA, and ARM are used for digital signal processing. Cascaded Integrator-Comb (CIC) filter and polyphase filter are utilized to accelerate processing speed and reduce system resource consumption due to the fast signal processing. Experiment results show that the digital attenuators expand the signal dynamic range 60dB. CIC filter and channelized receiver based on polyphase filter banks can save resource consumption and improve the efficiency of signal processing.