Equalink is a revolutionary linear and non-linear pre-distortion technology implemented in Newtec MDM6000 IP modems, M6100 modulators, MDM6100 modems and MCX7000 multi-carrier satellite gateways for DVB-S, DVB-S2, and DVB-S2X.
Equalink is designed to compensate for the effects of imperfections in the filters and amplifiers of the satellite and provides breakthrough performance gains on DTH and IP trunking satellite links. DTH operators can increase the link margin of all settop boxes in the field by simply enabling Equalink at the modulator side. This pre-correction improves the performance of the end-to-end satellite communication channel and allows the use of higher modulation schemes such as DVB-S2 16APSK or 32APSK on carriers occupying a full transponder. This extra link margin can be used to improve the coverage/availability or it can be used to increase the symbol rate in combination with a lower roll-off factor. For IP trunks, counteracting the imperfections of the satellite channel allows the use of higher modulation schemes such as DVB-S2(X) 16APSK or 32APSK up to 256APSK on carriers occupying a full transponder.
For Direct-to-Home broadcasting applications, Internet backbones and other high speed satellite applications, this performance improvement represents up to an additional 10 % of data traffic in the same satellite capacity.
Equalink is a set of advanced digital filters and algorithms implemented in the modulator. The linear filter compensates for group delay and frequency response imperfections of the satellite input multiplexer (IMUX), while the non-linear pre-correction compensates for the combined effect of matched filters and transponder Travelling Wave Tube Amplifier (TWTA) nonlinearities (AM/AM and AM/PM conversions).
Equalink can be used in conjunction with any standard satellite receiver and is very easy to operate.
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