FPGA Design Of OFDM Baseband Modem

This paper investigates algorithms and FPGA implementation of the OFDM base-band modem. RS coder , decoder and square-root raised cosine filter are implemented. Firstly, OFDM modulation theory and top level module of the modem have been introduced, some basic principles for FPGA design have been introduced too. Then, the code theory and time-domain iterative decode algorithm of RS code is introduced, RS coder and decoder are designed and implemented in this base. After that, the principle of base-band signal shaping and some structures of base-band signal shaping filter are introduced, then the square-root raised cosine filter is implemented in polyphase structure.