对Hamming(7,4),Hamming(15,11),Hamming(31,26)符号的重量分布用MATLAB进行分析-For Hamming codes a resonably simple means of determining the weight structure is available.

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

OFDM is multicarrier modulation (MCM) technique [1] which provides an efficient means to handle high speed data streams on a multipath fading environment that causes ISI. Normally OFDM is implemented using FFT and IFFT’s. To decrease the BW waste