NMEA语句读取程序，实现了GPZDA\SDDBS\等解释- NMEALINEREAD currently supports the following NMEA sentences: $GPGGA Global positioning system fixed data $GPGLL Geographic poition [latitude, longitude & time]

Calculating a target and ocean echo power spectral density, Bayesian parameter estimation principle mixed logit model, NRZ type differential phase modulation signal modeling and simulation analysis.