System, method and base station for integrating mobile communication and frequency modulation broadcast function

Abstract

The invention discloses a system, a method and a base station for integrating mobile communication and FM broadcast function, the core ideas are as follows: in the base station, each base transceiver station is allocated with a satellite synchronous time service unit, a synchronous exciter and a frequency modulation transmitter correspondingly and respectively; then the satellite synchronous time service units acquire GPS time scale signaling information and send to operation maintenance units of the frequency modulation transmitters and the base transceiver stations; the operation maintenance units calculate pulses per second of GPS and send to the synchronous exciters which lock the carrier frequency of the frequency modulation transmitters; the frequency modulation transmitters receive frequency modulation signals, extract GPS time scale signaling information and compares the GPS time scale signaling information with the GPS time scale signaling information from the satellite synchronous time service units, thus obtaining link time-delay, and therefore, the frequency modulation signals are broadcast after compensation. By adopting the system, the method and the base station, synchronous covering of communication signals and FM broadcast signals is realized, thus avoiding repeated construction of basic facilities, such as iron towel rooms and the like and reducing the cost.

Description

technical field [0001] The present invention relates to the field of wireless communication and FM (Frequency Modulation, FM) broadcasting field, in particular to a system, method and base station integrating mobile communication and FM broadcasting functions. Background technique [0002] Wireless broadcasting and coverage are usually the technical basis of a country's mass media means, and it is the most direct, effective, and fastest government machine and irreplaceable information dissemination tool to mobilize the people in special periods and circumstances such as disasters and wars. FM radio has a wide audience because of its quiet frequency band (87.5MHz ~ 108MHz, which will not interfere with the 900M and 1800M frequency bands of the GSM system), high sound quality, small and cheap receivers. With the continuous development of electronic technology, most of the MP3, MP4, PDA (personal digital assistant), and mobile phones now have the function of FM broadcast recept...

AI Technical Summary

Problems solved by technology

[0005] For traditional base stations, the clock accuracy required by BTS (Base Transceiver Station) is ≤±0.05ppm (Part Per Million, parts per million) (corresponding to 13MHz±0.65Hz), while the clock provided by the base station itself The accuracy is <±0.025ppm, which cannot meet the frequency difference requirements of FM broadcasting

Therefore, for traditional base stations, it is impossible to provide pilot frequencies for FM co-channel broadcasting

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