FSR is an ideal solution that can address the network coverage in rural areas without increasing the BTS CAPEX and is cost effective compared to similar micro cell system. Installation is also much convenient and can be used in weak signal areas, highways, subways and remote villages. In those areas, FSR can replace the BTS to extend the coverage and maximize the capacity utilization of the remote base station.
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Frequency shifting repeater consists of a master unit and remote unit. The master unit is directly/wirelesses coupled to the base station, coverts the original/work frequency to a different shift/link frequency and then forward the signal to remote slave units over the air by their transmission antennas. Remote units use transmission antenna to receive shift /link frequency from the master units and convert it to the original/work frequency, amplify the signal and then forward the signal to mobile station inside the target area through serving antenna. The distance between the master & remote unit can go up to 18 ~ 20 Kms with in the normal cell range, however by enabling the extended cell range option in the cell sector FSR master to remote distance can go up to 50 ~ 55 Km if LOS(Line of Site) is clear.
Since the FSR is changing the frequency during transmission, the isolation requirement between donor & service antennas is not critical as in the case of conventional repeaters. So it is very easy for site survey and installation. The other advantage of FSR is that, we can use Omni directional antenna as a transmit antenna at the remote unit.