Principle and characteristics of optical fiber repeater
Release time:
2023-09-25
Principle and characteristics of optical fiber repeater
fiber optic repeaterThe near-end unit is coupled with the downlink signal of the base station, the radio frequency signal is converted into an intermediate frequency signal through the duplexer and the frequency conversion module, and then the analog intermediate frequency signal is sampled into a digital signal through the high-speed A/D converter of the intermediate frequency board, and the optical fiber direct station realizes the digital down conversion function. The field programmable gate array implements channelization processing according to the requirements of different mobile networks, completes automatic gain control and automatic noise reduction, runs the CPRI protocol, and converts the optical signal to the remote unit through the optical module. The remote unit of the digital optical fiber repeater converts the received optical signal into a digital signal, which is DUC converted by the field programmable gate array through the intermediate frequency board, and then transmitted to the digital-to-analog converter. Digital analog signals are converted into RF signals by the frequency conversion module,fiber optic repeaterAfter being amplified by the power amplifier and low noise amplifier integrated module, it is transmitted by the relay antenna. Similarly, the repeater antenna receives the uplink radio frequency signal from the mobile phone, and after similar amplification in the reverse direction, the enhanced uplink signal is transmitted through the optical fiber to the radio frequency signal recognizable by the base station and transmitted to the base station antenna.
Throughout the process,fiber optic repeaterThere is no mutual influence between the digital signal transmission and the optical transmission, so the digital signal will not attenuate with the attenuation of the optical signal, and the wireless signal path loss between the base station and the repeater is compensated. Therefore, during long-distance high-speed transmission, a high dynamic range can still be maintained, the signal quality of the optical fiber repeater can be ensured, and the spectrum resources and network equipment can be utilized to the maximum extent, which is equivalent to providing a two-way transparent channel between the base station and the mobile phone, thereby expanding the wireless signal.
fiber optic repeaterProduct Features:
A near-end fiber repeater machine can generally support 4 far-end machines.
Using wavelength division multiplexing technology, long-distance transmission is realized through an optical fiber.
fiber optic repeaterHigh selectivity and low insertion loss filters are employed to reduce interference between the uplink and downlink.
Detailed repeater parameters and status monitoring, such as RSSI, temperature, output power level, gain, attenuation, return loss, voltage standing wave ratio, etc.
fiber optic repeaterEquipped with RS-232 port, can be connected to a portable notebook computer for local testing.
The near-end machine can monitor the remote machine.
You can use SMS, GPRS or TCP/IP for remote monitoring.
7*24 hours customer service online
Company Address
Building A2, New Era Gongrong Industrial Zone, No.2 Shihuan Road, Shiyan Street, Bao 'an District, Shenzhen
Copyright @ 2018 Hengrui All Rights Reserved