Notes on Simulcast, Synchronization of Radio Base Stations

Some links:

• An important reference from KC2IRV that talks about synchronization requirements.
• A good intro video on simulcast.
• A video about simulcast systems
• An article that gives some parameters.
• An interesting article that talks about the risks to public safety communications.
• Several case-studies and background

The conventional wisdom states that the baseband signal needs to be synchronized to within 30 degrees of phase across different transmitters. For a 1kHz tone that equates to about 80uS of accuracy.