Active Member
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[China]
Contact name:Albert
Shenzhen Greetwin Technology Co.,Limited |
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Outdoor 2W EGSM900 single frequency ICS repeater mobile phone 4g 2g 3g gsm signal amplifier booster repeater
The ICS Repeater (Interference Cancellation System) is a new kind
of single-band RF repeater that can automatically detect and cancel
the interference signals caused by oscillation of RF feedback
between the Donor and Coverage Antennas in real time by adopting
DSP (Digital Signal Processing) technology. It can continuously and
stably cancel the interference signals and be adapted to any
changes in the surrounding RF environment (including fixed and
mobile objects).
| Items | Specification | ||
| Uplink | Downlink | ||
| working frequency band (MHz) | 880-915Mhz | 925-960Mhz | |
| Maximum gain(dB) | 90±3dB | 90±3dB | |
| Output power (dBm) | 27±1 | 33±1 | |
| Max. ALC level | ≥25dB | ||
| Noise coefficient(dB) | ≤5 | ||
| Transmission delay (us) | ≤10 | ||
| Frequency tolerance (ppm) | ≤0.05 | ||
| In Band fluctuation (dB) | ≤3 | ||
| ACPR(dBc) | ≤-45 | ||
| Gain adjustment range (dB) | ≥30 | ||
| Gain adjustment linearity | 10 dB | ±1.0 | |
| 20 dB | ±1.0 | ||
| 30 dB | ±1.5 | ||
| Port VSWR | ≤1.5 | ||
| RF interface | N-Female | ||
| Isolation | Isolation less than gain 10dB, not self excitation,EVM≤12% | ||
| Power Supply | 220VAC±44V | ||
| monitor | Local USB | ||
| Remote SMS or 3G&4G data | |||
| Operating Temperature | -20℃～+55℃； | ||
| Relative Humidity | ≤95% | ||
| Dimensions | 510*300*185mm | ||
| Weight | 20KG | ||
| Protection class | IP65 | ||
Traditional outdoor site is often affected by the local
installation environment limit so it cannot improve the isolation
between the donor antenna and the retransmission antenna. Cause the
equipment cannot be erected and normally open, ICS repeater can be
very good to solve this kind of problem.
High Gain of Equipment
The traditional wireless outdoor site because conditions by
isolation must be greater than the gain of 15dB, cause equipment
gain can not be bigger because of impacting by erecting
environmental, ICS repeater get rid of the aforementioned
influence, Can increase the equipment gain, and achieve the weak
signal area normal coverage.
Uplink Squelch Function
The introduction of digital technology and application of software
radio programming makes the equipment have the uplink squelch
function, greatly reduced the interference to the base station by
Repeater.
Compared with the wireless repeater, ICS repeater has the following advantages:
Compared with fiber optic repeater, ICS repeater has the following advantages:
Compared with frequency shift repeater, ICS repeater has the following advantages:
Through unique digital processing technology, 900M ICS repeater effectively capture and tracking the transmission characteristics of external leakage path, The transmission characteristics can be equivalent to a FIR filter, it is called mirror filter. send the signal which will be sent to the mirror filter, under the ideal condition, External leakage signal in the signal which is export and reception by mirror filter is exactly the same, so that you can subtracts the mirror filter output in the input signal, to suppress the interference. Because of the external leakage environment is unknown and changing, 900M ICS repeater first needs catch the transmission characteristics of leakage path in feedback inhibition calibration status, and keep trace the external environment changes in normal operation.
Application Diagram:
Indoor Coverage:
Outdoor Coverage:
As shown in Figure:
Figure 1 ICS Repeater System Principle Diagram
ICM Module contains: Frequency converter, A/D, D/A, Digital Signal
Processing (Interference cancellation).
