The Most Flexible and Efficient SCPC modem

January 17, 2013 | By More

Datum Systems markets its products as “precision satellite modems” and claims to have designed industry’s most flexible and efficient SCPC modems.

Datum pioneered use of advanced LDPC coding in SCPC to simultaneously achieve high spectral efficiency and configuration granularity. The PSM-500 series of Datum IF and L-band SCPC modems offer high versatility and performance, allowing satellite service providers and telecom operators to optimize the utilization of satellite capacity.

With a smoothly distributed configuration map, SCPC links can be customized to squeeze the most out of satellite’s assigned bandwidth and associated spectral power, while keeping processing latency at the desired level.

To granularly manage performance and latency, Datum offers around 200 distinct LDPC configuration combinations. These support a wide range of earth station or satellite footprint conditions, maximize use of satellite bandwidth resources and manage end-to-end processing latency:

  • DatumFour Modulation Schemes: BPSK/QPSK; 8PSK; 8QAM; 16QAM
    • Supports most possible satellite footprint and earth station equipment characteristics
  • Seven FEC Rates: 1/2; 2/3; 3/4; 14/17; 7/8; 10/11; 16/17
    • Granularity maximizes throughput, use of allocated satellite bandwidth and spectral power
  • Seven LDPC Block Size Options: 256; 512; 1K; 2K; 4K; 8K; 16K
    • Small-to-large block size distribution avoids fixed-block latency constraints and takes FEC processing latency to the exact desired level

Learn more by downloading Datum´s Smart Choice for SCPC paper:

Download (PDF, 368KB)

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About the Author ()

Carlos Placido is an independent consultant with twenty years of progressive experience in the areas of telecom consulting, business development, engineering and R&D. With focus on emerging satellite markets and technology, he has conducted numerous strategic consulting projects as well as research and management activities, including global market research studies for Northern Sky Research (NSR), business development support for technology vendors and project management at Telefonica. Until 2004, Carlos led a development team at INTELSAT, where he was responsible for identifying and validating future satcom uses of emerging video and IP data technologies. Carlos is also contributor and administrator for Satcom Post, an online professional knowledge-sharing platform. He holds an engineering degree from the University of Buenos Aires and an MBA from the University of Maryland, Smith School of Business.

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