Border city wireless emergency broadcasting system design brief – Designed by Beijing Haite Weiye Technology Co., LTD
I. Overall function of the system
System USES FM – RDS wireless emergency radio transmission mode, make full use of the original city radio FM broadcast transmitter (with RDS radio need to confirm whether existing transmitter channel interface, if do not have to be adding FM broadcast transmitter), through the original vice channel join RDS FM radio transmitter digital coding signal, The original transmitter can transmit both audio signal and control signal. As the main transmitter of emergency broadcast signals, the municipal radio station broadcasts to the radio FM receiving terminals covering the whole city through the municipal radio station. In case of emergency, the system can be used to carry out unified, zoned and fixed-point wireless emergency broadcasting and propaganda at the border, entry and exit ports, main roads, key business districts, key transportation hubs, densely populated areas and squares of border cities.
The sub-control center of FM-RDS wireless emergency broadcasting system should be installed in the emergency broadcasting vehicle. In case of emergency, the wireless FM receiving terminal within the coverage area can be opened on the spot by the emergency broadcasting vehicle for emergency broadcasting or long-distance super power propaganda.
Ii. System architecture and functions
1. Municipal Radio Station Control Center:
The municipal Broadcasting Control Center is the unified broadcasting control center of the city. Normal broadcast programs are broadcast regularly by the municipal broadcasting center of the whole city, which can choose to broadcast all, sub-region (for crowded places or squares) broadcast, broadcast to a certain place. The municipal broadcasting center has a priority level. In addition to regular scheduled broadcasting, the municipal broadcasting center may also carry out emergency broadcasting to all, any districts and any places.
2. Emergency vehicle sub-control Center:
Emergency vehicle sub-control center, used to open and broadcast broadcasting equipment in relevant areas in emergency. It can be broadcast to the entire area covered by the emergency broadcasting vehicle, to a subregional area or to a specific location. Fm-rds radio emergency broadcast center can be set as the highest priority according to the situation, in order to deal with the occurrence and disposal of emergency.
In the emergency broadcast vehicle equipped with a large power remote shout system, in case of emergency can be immediately shout. The system is composed of high-power amplifier, ultra-large power remote loudspeaker and plane wave loudspeaker, and the sound amplification distance can reach 1-3 km.
3. Receiving Mode:
Fm-rds wireless FM speakers are installed in the main streets and squares of the city to receive and broadcast emergency broadcast programs. The ultra-large power long-range propaganda system can be deployed at 2-3 km intervals along the border with the DPRK, and the jiehe City radio emergency broadcasting system can carry out emergency long-range propaganda to deal with possible hidden dangers of the border.
System security and anti-theft broadcast function
The system uses the method of internal code encryption to prevent illegal broadcast. The premise for each terminal of the system to work is to be able to detect the front-end identification code. When encountering interference signals or illegal co-frequency carriers, the terminal only receives the carrier frequency, but cannot receive the system identification code, the system will automatically shut down, so as to achieve the function of stealing broadcast. The system encryption is soft encryption method, not the conventional physical hard encryption, so it has the characteristics of good confidentiality, not easy to be cracked.
Iv. System configuration List
