Newtec Breaks Through the 500 Mbps Barrier

Technology & Convergence

New DVB-S2 standard improvements break speed records on a 72 MHz Ku transponder operated by Eutelsat.
 
Newtec has ushered in a new era of bandwidth efficiency by breaking the magical 0.5 Gbps two way throughput over a 72 MHz transponder on a Eutelsat satellite.
 
Testing was performed at Eutelsat’s teleport in Rambouillet during the night in order not to disturb crucial daytime sport transmissions. A significant margin was taken in cloud cover conditions to ensure the tests were relevant for real-life high availability services in broadcast and telecom markets.
 
The tests were carried out in several steps to validate different market application scenarios. In the two-way high speed backbone tests, Newtec combined its Bandwidth Canceller and Next Generation modems (Newtec MDM6000 series) to achieve a staggering 506 Mbps (2 x 253 Mbps).
 
A number of innovative elements were used to improve overall current market available efficiencies, including Clean Channel Technology® (a Newtec technology for implementing lowest roll-off and filtering to boost throughput). New modulation and Forward Error Correction (FEC) codes were also used, which can be seen as demonstrators for evolutions in extending the DVB-S2 standard. In particular for this part of the test, a complete reworked 32 APSK 135/180 (135 over 180) modulation proved to be most optimised.
 
In another test, 352Mbps was achieved in a one-way distribution set-up over the 72 MHz transponder using 64 APSK modulations and related codes, with significant margin on the Ku-band system.