Digital Multi-Band In-Train Repeater
Innovative Multi Operator Collaboration Coverage Solutions Basis on SDR & DSP Platform for In-Train Scenario
Train applications present extremely challenging RF environments. The complexities of different terrain combined with the rapidly changing outdoor signal levels of the various networks makes it difficult for operators to provide the coverage and service their customers demand while travelling from city to city or to another country, To improve availability and quality of wireless signals on trains, Helios In-train repeater is a more cost-effective method over installing expensive base stations.
Trains travel through Cellular Boundaries requiring the Repeater to quickly re- tune to locally Licensed Sub-Bands. The Repeater Equipment is subject to constant vibration conditions and occasional high shock levels. Also, the Donor Antenna, usually located on the roof the Train Car, must have sufficient Isolation from the Service Antenna to insure that a Self-Oscillation condition is not initiated. Many new Rolling Stock are delivered with Built-In 19” Rack Space to house In-Train Repeaters.
For these reasons, Helios has developed our rack mount Digital Multi Band In-Train Repeaters to resolve these issues. It provides a fully Digital software-based platform and enables on-the-fly filter Re- Tuning at Boundary Borders.
In-train Coverage Challenges
Train applications present extremely challenging RF environments. The complexities of different terrain combined with the rapidly changing outdoor signal levels of the various networks makes it difficult for operators to provide the coverage and service their customers demand while travelling from city to city or to another country.
To improve availability and quality of wireless signals on trains, Helios In-train repeater is a more cost-effective method over installing expensive base stations.
Business travelers expect good coverage, without dropped calls, and data connections wherever they are, for constant access to the internet, e-mail, and various mobile device applications.
Helios® Smart Digital In-Train Repeaters
Repeaters Trains travel through Cellular Boundaries requiring the Repeater to quickly re- tune to locally Licensed Sub-Bands. The Repeater Equipment is subject to constant vibration conditions and occasional high shock levels. Also, the Donor Antenna, usually located on the roof the Train Car, must have sufficient Isolation from the Service Antenna to insure that a Self-Oscillation condition is not initiated. Many new Rolling Stock are delivered with Built-In 19” Rack Space to house In-Train Repeaters.
For these reasons, Helios has developed our rack mount Digital Multi Band In-Train Repeaters to resolve these issues. It provides a fully Digital software-based platform and enables on-the-fly filter Re- Tuning at Boundary Borders.
Main Features and Benefits
- Supports 900MHz, 1800MHz and 2100MHz in a single chassis with a fully integrated multi-Band combiner
- IP-67 Compact Cabinet enables to eliminate condensation in harsh cold environment
- Advanced Digital Filtering Algorithms for Multi-technology, MultiBand
- Flexibility on changing the repeater configuration while travelling internationally based on received GPS position or Auto select frequency basis on UARFCN&PLMN
- Local IP Web Browser GUI via Built-In RJ-45
- Built-in Proprietary 60dB AGC&ALC function
- Additional RJ-45 port for Remote IP viewing of Local GUI or HELIOS® NMS Remote Control via external Ethernet or wireless modem
- Built-in 4G Modem for HELIOS® NMS Remote Control
- SNMPv3 Trap alarm and MIB file support
- Supports multi tunable Sub-Bands
- SOC & Embedded architecture enables delivery of significantly improved network coverage with very low power consumption
- Composite downlink RF Outputpower +23dBm with 85dB Gain
IP67-rated 19” Rack-mountable design
Supports 900MHz, 1800MHz and 2100MHz in a 19’ frame of single chassis with a fully integrated multi-Band combiner
New Innovate Cabinet Design Enables Eliminating Condensation
New Innovate Cabinet Design
19” IP-67 Compact Cabinet enables eliminating condensation in harsh environment
Common 19″ Rack Cabinet Design in Market
Traditional 19” IP-30 Cabinet disables to eliminate condensation in harsh environment
And it will be risk to dangerous the PCB with such tiny water droplets generated after condensation
New Advanced Digital Filtering Algorithms
Multi-Bands | Multi-operators | Multi-technologies
Full Advanced filtering algorithms in DSP and high linearity and wide operating bandwidth of Power Amplifiers design to support coexistence of multiple carriers with different technologies in the same band and no changes are needed in case of new operator in coming in the system, frequency re-farming or insertion of new technology.
Independent AGC & ALC for each sub-band
- In case of different input power of different sub-band, it can reach the same output power to realize same coverage performance for all operators
- Sensitively & rapidly AGC algorithm operated in high speed FPGA and DSP
- Automatically switch off the repeater in case of too close to the BTS by built-in AGC algorithm or option GPS setting
- Realize Smart AGC for each channel / sub-band / time slot individually
- High-speed & Deep AGC range min. 60dB for vehicle on move
- Accurate Power Control to prevent uplink interference back to Donor BTS. (Accuracy: 0.1dB/Step)
Automatic Frequency Allocation by GNSS Positioning
Full Advanced filtering algorithms in DSP and high linearity and wide operating bandwidth of Power Amplifiers design to support coexistence of multiple carriers with different technologies in the same band and no changes are needed in case of new operator in coming in the system, frequency re-farming or insertion of new technology.
When crossing from one city to another, an embedded GPS receiver in the repeater allows automated frequency allocation based on GPS position. This innovative feature adds flexibility by changing frequency configurations. The possibility to add different sub-band configurations leads to a standard solution for all train manufacturers and wireless operators. Repeater frequency setting configurations will automatically be changed based on detection of GPS position.
Web-based GUI
- GUI based Spectrum Analyzer (Option)
- 2*RJ-45 Port for Local Control and Alarming on an IP Web Browser GUI
- SNMP V2&V3 support with a MIB File
- Support Remote Control via wireless modem
