NTN TDL channels detection data

According to the NTN-TDL channel model described in 3GPP TR 38.811, this paper uses MATLAB R2021a for channel simulation and detects four TDL channels using an m-sequence of length 127. After obtaining the output signal, the channel impulse response CIR is obtained by performing correlation operations with the local replica sequence, and the channel frequency response CFR is obtained by performing Fourier transform. Then, feature extraction and data processing are performed to obtain the channel simulation dataset for this paper's experiment.