OFDM systems avoid inter-symbol interference (ISI) and inter-carrier interference (ICI) by inserting a cyclic prefix (CP) larger than the channel impulse response length before the time-domain symbol. However, long CP will reduce the efficiency of data transmission. A minimum mean square error (MMSE) channel shortening equalization technique may be employed to compress the channel impulse response length.

代码
....\OFDM_MMSE_BER_SNR
....\.................\BER_SNR_OLD_AWGN.fig
....\.................\JW_SNR_OLD_AWGN.fig
....\.................\MMSE_SIRF.m
....\.................\OFDM_MMSE_256FFT_16CP_32PATH_32SIRF_15TIR.mat
....\.................\OFDM_MMSE_BER_SNR_256FFT_16CP_32PATH_32SIRF_15TIR.fig
....\.................\OFDM_MMSE_JW_SNR_256FFT_16CP_32PATH_32SIRF_15TIR.fig
....\.................\ofdm_MMSE_v2.m
....\OFDM_MMSE_BER_SNR30dB_Nb
....\........................\BER_SNR_30dB_Nb_1_16.fig
....\........................\Jw_SNR_30dB_Nb_1_16.fig
....\........................\MMSE_SIRF.m
....\........................\ofdm_MMSE_v2.m
....\........................\SNR30dB_Nf_32_CP_16_path_32_Nb_1_16.mat
....\OFDM_MMSE_BER_SNR30dB_Nf
....\........................\BER_SNR30dB_Nb16_CP_16_path_32_Nf.fig
....\........................\Jw_SNR30dB_Nb16_CP_16_path_32_Nf.fig
....\........................\MMSE_SIRF.m
....\........................\ofdm_MMSE_v2.m
....\........................\SNR30dB_Nb16_CP_16_path_32_Nf.mat
....\OFDM_NO_MMSE_BER_SNR
....\....................\BER_SNR_NO_MMSE.fig
....\....................\BER_SNR_NO_MMSE_CUTOFF.fig
....\....................\BER_SNR_NO_MMSE_enoughCP.fig
....\....................\OFDM_NO_MMSE_256FFT_16_CP_32PATH.mat
....\....................\ofdm_NO_MMSE_v2.m

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