A small question related to the CFO(srsRAN_Project\lib\phy\upper\signal_processors\port_channel_estimator_average_impl.cpp)

[lpg-delete]

srsRAN_Project\lib\phy\upper\signal_processors\port_channel_estimator_average_impl.cpp

initialize_symbol_start_epochs
This function calculates the number of sampling points corresponding to the starting position of each OFDM symbol, but it only accumulates the CP (Cyclic Prefix).

preprocess_pilots_and_estimate_cfo
lin 361 float cfo = noisy_phase / TWOPI / (symbol_start_epochs[i_dmrs_1] - symbol_start_epochs[i_dmrs_0]);
(symbol_start_epochs[i_dmrs_1] - symbol_start_epochs[i_dmrs_0]) : This difference is merely the cumulative value of the CP between the symbols of dmrs1 and dmrs0, rather than the cumulative value of the elapsed time between dmrs1 and dmrs0. Because the cumulative value of elapsed time = CP cumulative value + the cumulative value of the symbols themselves.

I don't understand why it's handled this way here. If my understanding is incorrect, please point it out. Thank you very much.