In OFDM transmission, all the available subcarriers from the DFT is not used for data transmission. Typically some subcarriers at the edge are left unused to ensure spectrum roll off. For the example scenario, out of the available bandwidth from -10M

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通信系统中比较常用的LS及LS+DFT算法的MATLAB仿真平台，用于学习两种方法并比较其性能-Communication systems commonly used LS and LS+ DFT algorithm MATLAB simulation platform for learning both methods and compare their performance