Signal coverage
Ground-based transmitting center transmits signals<br>
high power S-band<br>
Synchronous satellite receiving and forwarding<br>
Receiving terminal on the ground
Single transmitting station<br>
In areas with small urban areas and flat terrain<br>
Single transmitting station<br>
Co-frequency transponder supplemental coverage<br>
U-band CMMB signal<br>
Single-frequency network
In areas with large urban areas<br>
Adopt single frequency network (SFN) coverage mode
Based on several transmitting stations<br>
Co-frequency transponder supplemental coverage<br>
GPS receiver, multiplexer and modulator synchronize the system<br>
Determine the time synchronization relationship
