Major performance upgrade for Q-Lite modem
May 3, 2017
Paradise is pleased to announce the release of major performance enhancements to the Q-Lite satellite modem.
The Q-Lite is available as an OEM modem card for comms-on-the-move (COTM) applications and also as a half-width chassis-based modem. To date, the OEM product has been designed into around 20 different satellite terminals and man-packs from various vendors. The Q-Lite half-width modem saves air-conditioned space at the hub by allowing two to be fitted side-by-side in 1U of a 19-inch rack and its versatility also makes it ideal as a remote modem for COTM and mobile comms applications.
The Q-Lite maximum data rate has been increased to 345Mbps bidirectional, using the highly bandwidth efficient DVB-S2/S2X waveform and GSE packet encapsulation. Supported symbol rates have been increased to 70Msps, allowing the Q-Lite to generate a single carrier that fills a 72MHz transponder. GSE provides a highly efficient method of encapsulating IP packets within DVB-S2/S2X satellite frames, with an overhead of less than 2%. Both GSE Lite and GSE High Efficiency Mode (HEM) are supported and GSE DVB-S2/S2X interoperability tests were recently successfully completed in co-operation with another satellite modem vendor.
The Q-Lite half-width modem, which was originally L-band only, has been extended to dual IF-L-band operation as standard, further enhancing its applicability in relation to hub applications.
Modem RF performance has been enhanced in several key areas including extending supported L-band frequencies out to 2450MHz, simplifying the RF setup required when using wider HTS transponders.
The Q-Lite also benefits from another recent enhancement, to our carrier overlap technology, Paired Carrier, which has been re-engineered from the ground up and is now called Paired Carrier+. It now provides significant additional levels of suppression of the unwanted signal (thereby reducing self-interference), faster signal acquisition and increased robustness in the face of signal degradation. Cancellation bandwidth has been increased to cover a whole 72MHz transponder, allowing up to around 700Mbps to be supported on one transponder in a single point-to-point bidirectional link.
All of this has been achieved with no increase in SWaP (size, weight and power) other than for a small increase in consumed power at the highest data rates. The enhanced Q-Lite is fully backwards compatible with older versions in terms of form, fit and function, as well as in relation to the protocols used for monitor and control.
Teledyne Paradise Datacom
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