Design and Implementation of Dual Channel Speech Signal Transceiver System Based on FPGA

Real-time speech information has always been the main way of information transmission, but there are still problems in transmission. Firstly, while speech signals are easy to transmit information, they also bring information leakage and malicious tampering. Secondly, speech signals are more or less affected by noise, interference and transmission effects in the transmission process, which will make the recovery of speech signals more complicated. Based on the above, the wireless transmission of speech signals is taken as the background to realize the merging and separation of dual-channel speech signals. The problems of information leakage and distortion during the transmission of speech signals are studied. The encryption and decryption of speech signals are taken as the key points. Realize dual speech signal receiving and receiving based on Field Programmable Gate Array (FPGA). The frequency division multi-plexing method is used to transmit dual speech signals simultaneously, realize speech signal convolution on FPGA and extract two speech signals from the convolution signal. AES algorithm is realized the encryption and decryption of on FPGA. 2FSK modulation and demodulation in digital modulation is selected to complete the design and implementation of the whole system, and the research is completed through the final overall modulation and analysis.