用Matlab将Radio Frequency（RF）收发模块进行模型化。非常少见用Matlab对RF的建模

In order to start using GNSS-SDR, you may want to populate ```gnss-sdr/data``` folder (or anywhere else on your system) with raw data files. By raw data we mean the output of a Radio Frequency front-end s Analog-to-Digital converter. GNSS-SDR needs s