This paper focuses on the design of an adaptive Orthogonal Frequency Division Multiplexing (OFDM) system based on the feedback of interactive channel estimation. It shows how the interactive information of Turbo code can be used to improve the precision of channel estimation and how the improved channel estimation is used to optimize the performance of the OFDM system adaptively. The result of simulation shows that this adaptive Turbo-OFDM system can do well between the performance and the decoding speed, thus result in lower bit error rate (BER) and higher speed of decoding.
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