Major performance improvements for Paradise's modem carrier overlap technology

April 21, 2017

Our carrier overlap technology, Paired Carrier, which was first introduced in 2009, has been re-engineered from the ground up in order to significantly boost performance across the board. In fact, due to the far-reaching nature of the improvements, we’ve renamed the second generation of this technology to Paired Carrier+ to differentiate it from its predecessor.


Carrier overlap technology works by transmitting both the outbound and inbound carriers on overlapping satellite transponder frequencies and then using echo cancellation techniques to remove the interference caused by the unwanted carrier, leaving just the wanted carrier. Typical bandwidth savings are between 40% and 50%.


The improvements include significant additional levels of suppression of the unwanted signal, resulting in much lower residual interference to the wanted signal, and improved BER performance. The acquisition process is now much faster, with the potential for false locks being virtually eliminated. Robustness in terms of maintaining carrier lock in the presence of unexpected signal degradation has been increased. Cancellation bandwidth has been increased to cover a whole 72MHz transponder, allowing up to around 700Mbps to be supported on one transponder when using our highly bandwidth-efficient DVB-S2/S2X.


Director of Engineering, Colin Mackay, commented: ‘The great thing about carrier overlap technology is that it brings a precise, guaranteed bandwidth saving 24 hours a day, 7 days a week, making the business case for users in terms of return on investment compelling. So the decision to bring the benefits of the very latest signal processing techniques to our users was simple and ensures we continue to offer an extremely competitive and attractive carrier overlap solution.’


Paired Carrier+ is being rolled out to all of our modem products over the next few weeks.