In NR PUSCH the longer CP is applied to the first slot in frame instead of first symbol in slot

[danielschaeufele]

According to TS 138.211, section 5.3.1, the length of the cyclic prefix is extended by 16κ for the first symbol of each half subframe.

An attempt to implement this was done in CarrierConfig.cyclic_prefix_length, but the code checks for the slot number instead of the symbol number.

[danielschaeufele]

I'm working on a fix for this issue. My proposal would be to add cyclic_prefix_length_first_symbol and symbols_per_half_subframe as parameters to OFDM(De)Modulator and as a property to CarrierConfig. The algorithm of OFDM(De)Modulator would then get an additional step to reshape everything into half subframes and drop/add the correct number of samples. Does this sound right to you?