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The project has brought forward key enabling technologies for a new generation integrated satellite-cellular system targeting rural deployments. This includes a low cost, low power 1TRX GSM radio and bandwidth efficient GSM-over-IP-over-DVB/RCS integration for low opex GSM backhaul.
The project objectives were:
The key issue was the development of elements that will bring capex and opex of the integrated VSAT/GSM BTS to the levels required to offer economically viable cellular services to presently uncovered areas.
The building blocks developed in this project are important elements of STM’s new generation integrated satellite-cellular systems called Super PicoTM GSM Base Stations enabling satellite-based cellular backhaul at capex and opex figures far below existing solutions in the market.
The radio module comprises a single mixed signal PCB in cast aluminium mechanical housing and interface to the GSM baseband modem over Ethernet.
The transmitter is based on digital filtering and sampling rate up-conversion in an FPGA followed by Digital-to-Analogue conversion and direct up-conversion to 900 MHz. The maximum output power is 2W.
On the receive side the signal is down-converted to IF prior to Analogue-to-Digital conversion, sub-sampling, down-conversion to baseband, filtering and sampling rate down-conversion.
The optimised GSM-over-IP-over-DVB/RCS interface is implemented in terms of added functionality at both ends of the DVB-RCS satellite link, i.e. at the SatLink VSAT IDU and at the HUB. The enhancements include protocol header compression techniques The techniques reduces the satellite bandwidth consumption by more than 30% in most cases.
The following main activities have been successfully carried out:
The following reviews were held:
The project is completed.