ICS DCS Repeater
description
Transcript of ICS DCS Repeater
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Digital DCS ICS Repeater
Description:
AS the traditional Wireless RF Repeater, the Wireless Digital ICS Repeater can also
achieve the bidirectional amplification of the base station uplink and downlink signal. Applied to
expand and extend the base station coverage, fill signal area where mobile signal is blind and
weak. But it’s a new type repeater which adopts Digital Processing Technology to detect and
counteract interference signal from wireless received signal. Its specialty is to dispel
interference, improve system gain and greatly reduce device’s requirement for isolation at the
same time. Its capability and function satisfy the Traditional Wireless Repeater protection.
Thinks to the ICS technology, the device can be set without the limits of antenna isolation. The
transceiver use a holding pole, antenna feed is easy to install, small occupation of land, and
convenience for property coordination. By adopting digital processing, the ICS Repeater can
debase the introduced noise of device effectively; reduce CAPEX by replacing part of the
traditional Frequency Shifting Repeater application. The ICS Repeater also has the ability to
Carrier Tracking, makes the device operating channel automatically regulate to the source
frequency channel of donor antenna, debase the device maintenance cost.
According to operators’ requirement for working frequency, either type of ICS Repeaters
can be chose:
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ICS Band Selective Repeater: amplify all signals in whole band (the band can be
customized).
ICS Channel Selective Repeater: only amplify the signal in one (two or four or six or eight
or twelve) appointed channel (namely, the narrow band which center frequency can be
appointed).
Principle diagram
Features & Benefits
Good Isolation
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:
The antenna isolation requirements can be reduced more than 35dB, Receiving
antenna and antenna using the same holding pole, thereby reduce the installation difficulty and
cost.
In the same antenna isolation conditions, the whole machine gain can be increased
more than 35dB, to achieve more coverage scope.
Has uplink noise suppression function, the impact to base station receiver sensitivity is
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small.
Has the automatic gain and level control function, ensure the output power is constant.
No special requirements on the feedback path between the receiving antenna and
transmit antenna, can adapt to various installation site.
Compared with fiber optic repeater, ICS repeater has the following advantages:
Does not need to rely on the fiber resources, can reduce the cost of installation.
There is no Local unit, reducing failure rate.
Compared with frequency shift repeater, ICS repeater has the following
advantages:
Work in the same frequency band, saving frequency resources.
Don't need OCXO, avoid because of constant temperature crystal aging induced
frequency drift.
There is no Local unit, reducing failure rate.
RF Specifications
ItemsSpecification
RemarksUplink Downlink
Working frequency (MHz) 1710-1785MHz 1805-1880MHz GSM900 & EGSM
Channel Number Up to 16 For GSM&DCS
Channel Width 200Khz For GSM&DCS
Maximum gain(dB) 95±3 105±3 Customized
Output power (dBm) 27-37±2 27-46±2 Customized
Waveform quality >0.96 >0.95
Automatic level control(dBm) △Po≤±1
Noise coefficient(dB) ≤5
Transmission delay (us) ≤10
Frequency tolerance (ppm) ≤0.05
Modulation precision EVM ≤8%
In Band fluctuation (dB) ≤3Inter-modulation attenuation(dBc) ≤-45
Gain adjustment range (dB) ≥30
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Gain adjustmentlinearity
10 dB ±1.0
20 dB ±1.0
30 dB ±1.5
Intermodulation attenuation ≤-45dBc For GSM&DCS
Out of Band Gain &Spurious Emission &
Output inter-modulation
GSM Meet ETSI TS 151 026 V 6.1.0
For CDMA&PCSMeet 3GPP TS 25.143 ( V 6.2.0 )
CDMAMeet IS95 & CDMA2000
System
SpuriousEmission Mask Meet 3GPP TS 25.143 ( V 6.2.0 )
For WCDMA&AWS
ModulationAccuracy
≤ 12.5%
Peak CodeDomain Error
≤ -35dB@Spreading Factor 256
Inputinter-modulatio Meet 3GPP TS 25.143 ( V 6.2.0 )
ACRR ≥ 30dBc/30KHz @ ± 5MHz≥ 50dBc/30KHz @ ± 10MHz
CDMASystemRho ρ > 0.980
AWSACPR Meet IS95 & CDMA2000
Port VSWR ≤1.5
Isolation Isolation less than gain 10dB, not selfexcitation,EVM≤12%
Power Supply 220VAC±44V
Monitor Local:RS232 Remote: SMS or GPRS or Ethernet
Photo
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