xio.c 提供xprintf(fmt,...)的简单实现，包括对 d, c, x等的转换。需要提供xputc()的底层驱动。-xio.c provide xprintf (fmt ,...) simple implementation, including the right d, c, x, etc. conversion. The need to provide xputc () the underlying drivers.

This file is for FMT(Filtered Multi-tone) BER(Bit Error Rate) graph. Total three different type of filter(RRC, PHYDYAS, Gaussian) is used, and just AWGN is added. No specific channel is applied. As you can see, almost three of them shows same BER.

Asynchronous Uplink Transmission in FMT-FDMA

FMT快速滤波器实现，快速解码，QAM调制，很适合学习，-FMT fast filter to achieve, fast decoding, QAM modulation, it is suitable for learning,