Dual Band Digital RF Repeaters

HELIOS® Digital Dual Band Repeater is a carrier-grade, consumer-friendly digital smart signal booster that maximizes a subscriber’s indoor wireless experience by eliminating in-building dead zones. It is a real cost-effective and intelligent solution to solve the last mile coverage problem, which adopts SDR (Software Define Radio) technology based upon our FPGA & DSP (Digital Signal Processing) Platform. It enables on-the-fly filter change upgrade by software without expensive hardware upgrading.

Intelligent Interference Cancellation

HELIOS® Digital Off-Air Repeaters include a Panted ICS (Interference Cancellation System) Feature. It measures the Isolation between Donor and Service Antennas and intelligent cancel the interference in real time. With ICS function, it prevents self-oscillation, enhance gain and coverage range and reduce isolation requirement between Donor Antenna and Services Antenna.

Intelligent Solution for UL Interference

HELIOS® Digital Repeaters detect Uplink activity and support muting. This means that when there is no activity in the Uplink, the Uplink is automatically closed in FPGA to prevent Uplink transmission from the Repeater to the BTS. When a call (voice or data) is made, the UL Squelch Algorithm activates the Repeater Uplink Channel. Automatic UL Gain adjustment according to the Downlink gain will also minimum the UL interference to the BTS.

The Repeater is connected via coaxial cable to Donor Antenna and Service Antenna, Donor Antenna is placed outside the building where it has easy access to a BTS signal, and the Service Antenna is placed in the building where it can extend radio coverage to the blind are

  • Available customized dual-band
  • Supports upgrading filter parameters in case of frequency re-farming by software
  • SOC & embedded architecture enables to delivery of significantly improving network coverage with very low power consumption
  • Supports tunable sub-bands
  • Better out of band rejection than analog SAW filter
  • Built-in RJ-45 interface for local control
  • Built-in modem for Helios NMS remote control
  • Built-in AGC & ALC function
  • High working gain as min. 95dB
  • RF Output power +40dBm

Electrical Specification

Frequency Range (Customized): Available customized dual-band

Max Composite Output Power: 30±2dBm/40±2dBm

Filters Design: Typ.  (Customized)

Gain: 90dB/95dB

AGC Control Range: Min 30dB

Gain Control Range: 30dB

VSWR: <1.5

Ripple in Band: Max ±2dB

Standard: Complies with 3GPP and ETSI

I/O Impedance: 50 ohm

Uplink Noise Figure: Max 6dB

Group Time Delay: Max 8µS

MTBF: Min. 50000 hrs

Power Supply: AC220V (+/-15%), 50Hz

Power Consumption: Max 180W

Remote Control: Built-in 2G/3G/4G modem as an option for Helios NMS remote control

Monitoring: Real-time alarm for Temperature, Input Under Power, Input Over Power and etc. Parameters monitoring for Output Power, Gain, Uplink ATT, Downlink ATT, etc.

External and Antenna Connection

RF Connector: N-type Female

Local Control: Local control via RJ-45 interface

Mechanical Specification

Temperature Range: -25℃ to +55℃

Humidity Range: Max 95%

IP Rating: IP65

Dimensions: 499*399*225mm

Weight: Max 34kg