Design and implementation of key modules of the OFDM receiving system based on FPGA

With the development of communication technology, the traditional channel multiplexing technology has been difficult to meet the higher needs of users. Orthogonal Frequency Division Multiplexing (OFDM) is a hot technology in the field of wireless communication, which can effectively eliminate the intersymbol interference and the inter-carrier interference. Starting the analysis from the model of the wireless communication system, this paper designs and realizes the key module of the OFDM receiver system based on FPGA, which includes interleaving and de-interleaving module, RS encoding and decoding module, QPSK modulation and demodulation modules, and some auxiliary modules. Besides, it uses the reconstruction and operation principle of FPGA to make the top document composed of each module complete the control and the realization of specific functions through written drivers and software platform. Through the performance test and analysis, the system has the advantages of less hardware resources, fast speed, good stability, etc., which can be widely used in the field of wireless communication.