本論文是在迴旋編碼(convolution code)的多載波多頻移鍵控系統(MC-MFSK)上，利用渦輪(turbo)解碼的觀念將遞迴式多用戶干擾消去(iterative multi-user interference cancellation )和軟輸入輸出的通道解碼器(SISO channel decoder)結合，相互交換軟資訊；其中通道解碼器利用多用戶偵測接收器(multi-user detector)的輸出來做為通道可靠值進行解碼，而多用戶偵測器利用解碼器的資訊進行多用戶干擾消去。此外，在多用戶接收器的部分，會以三值來表示封包檢測器(envelope detector)輸出的三種情況。最後，此系統會在可加性高斯雜訊(AWGN)、瑞雷(Rayleigh)通道下進行模擬展示其效能。

This thesis proposed a technique similar to turbo MUD based on IIC and SISO channel decoder for multiple-access multi-carrier M-ary frequency shift keying(MC-MFSK) system. We show the performance of 2-value decision and three-value decision MC-MFSK system over AWGN and Rayleigh fading channel.

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