Wireless Transmission Signal Simulation System Based on FPGA

In wireless communication, the wireless communication signal transmitted by the transmitting antenna reaches the receiver antenna through space transmission, which is a wireless transmission signal formed by the combination of direct signal and multipath signal. Aiming at the high reliability design of the receiver, a wireless transmission signal simulation generator is designed and fabricated. The system can simulate the direct transmission signal (SD) and multipath transmission signal (SM), and combine the two to obtain the analog wireless transmission signal (SOUT). The system constructs a DDS signal generator system through the PL end of FPGA, realizes AM modulation combined with the algorithm, and realizes the flexible control of signal parameters through DMA and AXI bus at PS end. The system supports to set the signal type, initial phase, amplitude and frequency of the direct signal and the multipath signal, as well as the delay, initial phase and amplitude attenuation of the multipath signal relative to the direct signal, and has the ability to control the amplitude, phase, frequency and delay with high precision.