The Rucksack Portable Receive Suite performance over WGS using the DVB-S2 Mini IRD

The Rucksack Portable Receive Suite (RPRS) is a light weight (less than 20 lbs.) GBS RS using a Ka-band phased array (approximately 193 square inches). The RPRS is capable of operation with a Mini Integrated Receiver Decoder (MIRD). The MIRD uses a limited version of the DVB-S2 standard (QPSK only with symbol rates from 1Msps to 23Msps in 1Msps increments). The MIRD is receive-only with a single tuner and is certified for TRANSEC operation. The Next Generation Receive Terminal (NGRT) is an operational, GBS receive-only terminal capable of operation with DVB-S2 using the Joint IP Modem (JIPM) versionl IRD when it is available. The NGRT uses a parabolic reflector antenna nearly lm in diameter. The JIPM has a full complement of DVB-S2 modulations and code rates (symbol rates from lMsps to 50Msps in lMsps increments) as well as TRANSEC. The MIRD and the future JIPM IRD remote Modem will be fully integrated with JIPM Network Control Centers at the various DoD Teleports. This will allow the JIPM NCC to support the RPRS/MIRD and the NGRT/JIPM IRD on the same DVB-S2 broadcast using Variable Coding and Modulation (VCM). This paper will determine the capacity of the RPRS/MIRD network, the NGRT/JIPM network and the combined network using a VCM broadcast over WGS at Ka-band. The approach will use a fixed symbol rate (23Msps maximum) for the individual broadcast streams and will maximize the combined network capacity. The modulation and coding will be chosen to maximize the network combined capacity consistent with both terminals having a similar propagation margin.