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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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