SATELLITE COMMUNICATION SYSTEM

A narrow band multi-channel satellite communication system, wherein a signal is transmitted to at least one narrow band satellite by means of a ground station, the ground station at least comprising an encoding module and a first modulation module, and the ground station being configured as follows: the encoding module being configured to encode a signal so as to acquire an encoded signal; and the first modulation module being configured to execute serial-to-parallel conversion on the encoded signal so as to generate a first branch bit stream and a second branch bit stream, wherein delay processing is executed in the first branch bit stream such that, in the situation in which a code element period is set between the first branch bit stream and the second branch bit stream at intervals, the first branch bit stream sequentially executes first level filter processing and first level modulation processing to acquire a first modulated signal, and the second branch bit stream executes first level filter processing