GEO-Mobile Radio (GMR) LDPC Decoder

GEO-Mobile Radio (GMR) is an ETSI standard for satellite phones. The Creonic GMR Decoder IP core supports the PNB2 burst packets that were added in GMR Release 2 (GMPRS-1) and use LDPC codes for the first time. The same burst modes and LDPC codes are also in GMR Release 3 (GMR-3G). The Creonic GMR LDPC decoder IP core is a field-proven solution.

Product Brief

FLEXIBILITY

LATENCY

THROUGHPUT

ERROR CORRECTION

Applications

Satellite Telephony
Further Low-throughput Applications

Features the Core Supports

Compliant with GMR Release 2, ETSI TS 101 376-5-3 V2.3.1 (2008-07) (GMPRS-1 05.003)
Compliant with GMR Release 3, ETSI TS 101 376-5-3 V3.1.1 (2009-07) (GMR-3G 45.003)
Support for return and forward link.
Support for short PNB2 (5,3) bursts and long PNB2 (5,12) bursts
Support for all PNB2 modulation schemes (Pi/4-QPSK, 16-APSK, 32-APSK)
Support for all PNB2 shortening, repeating, and puncturing schemes.
Support for all PNB2 LDPC codes (approximate channel coding rates 1/2, 2/3, 4/5, 9/10)

Your Benefits

FPGA-proven design, validated with satellite data
Soft-decision demapper, LLR-descrambler, block deinterleaver, and LDPC decoder included
Low-power and low-complexity design.
Burst-to-burst on-the-fly configuration.
Design-time configuration of throughput for optimal resource utilization
Faster convergence due to layered LDPC decoder architecture
Early stopping criterion for iterative LDPC decoder, saving a considerable amount of energy

Configurable amount of LDPC decoding iterations for trading-off throughput and error correction performance
Collection of statistic information (number of modified information bits, number of iterations, decoding successful)
Available for ASIC and FPGAs (AMD Xilinx, Intel)
Deliverable includes VHDL source code or synthesized netlist, VHDL testbench, and bit-accurate Matlab, C or C++ simulation model
The software model includes the corresponding transmitter part