How can I find the coverage area of repeaters?
(1) types of repeater stations for mobile communications;From transmission signals, there are GSM repeater and CDMA repeater station;--- from the installation site to outdoor machines and indoor machines;--- from the transmission bandwidth, there are broadband repeater and selective frequency (selective channel) repeater;--- from the transmission mode, there are vertical repeater, fiber transmission repeater and frequency shift repeater. ?(2) the type of mobile repeater;GSM mobile communication repeater stationGSM mobile communication repeater is a way to solve the blind spot of the base station coverage. The erection of the repeater can not only improve the coverage effect, but also greatly reduce the cost of the investment base station.GSM repeater is a communication device designed to eliminate the small signal blind area or weak signal area of GSM900MHz/1800MHz band mobile communication network. Blind signal is widely used in underground shopping malls, parking lot, subway, tunnel, high-rise buildings, entertainment, office or private residential elevator cannot reach the base station signal, but also has a fairly good coverage for the elimination of weak signal district city due to the impact of the edifice of several rural outdoor local signal shadow Yin the side or outer zone.
The repeater is a relay product, measure repeater quality indicators are mainly, intelligence (such as remote monitoring, etc.), low IP3 (Commission no less than -36dBm), low noise figure (NF), the reliability and good technical services.Using the repeater as "one of the necessary means of small capacity, large coverage target, mainly due to the use of a repeater is in order not to increase the number of base stations to ensure network coverage is two, far below the cost of micro cellular systems have the same effect. Repeater is a preferred scheme to solve the extended coverage capacity of communication network. It is compared with the base station has the advantages of simple structure, less investment and convenient installation, and can be widely used for the blind to cover and weak areas, such as shopping malls, hotels, airports, docks, stations, stadiums, entertainment halls, subway, tunnel, highway, island, high communication quality, solve the problems such as dropping.
Repeater (repeater) belongs to same frequency amplifying equipment, it is a radio transmitting and transferring equipment which can enhance signal in the process of wireless communication. The basic function of repeater is a radio frequency signal power amplifier. The repeater in the downlink, the donor antenna coverage area of the existing pickup signal through the isolation bandpass filter outside the signal band-pass excellent, filtering signal amplifier amplification again after the launch to be coverage. In the uplink link path, the signal of the mobile phone in the coverage area is transmitted to the corresponding base station by the uplink amplifying link processing in the same way, so as to achieve the signal transmission between the base station and the mobile phone.
