Vendor: Small World Communications Category: Channel Coding

GMR-1 High Speed LDPC Decoder

The LCD01G is a fully compatible GEO Mobile Radio (GMR-1) LDPC error control decoder.

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Overview

The LCD01G is a fully compatible GEO Mobile Radio (GMR-1) LDPC error control decoder. GMR-1 is used by a number of mobile satellite communication systems. This is a high speed version of the standard, providing decoding speeds significantly greater that that required for individual channels. For a 500 MHz clock, decoding speeds ranges from 63 Mbit/s for the slowest code to 300 Mbit/s for the fastest code.

Key features

  • GEO Mobile Radio (GMR-1) compatible
  • Nominal code rates of 1/2, 2/3, 3/4, 4/5 and 9/10
  • Data lengths from 488 to 8880 bits
  • Optional QPSK, 16APSK and 32APSK demapping, descrambling and deinterleaving
  • Includes ping-pong input and output memories
  • Up to 500 MHz internal clock
  • Up to 300 Mbit/s with 30 decoder iterations
  • 8-bit log-likelihood-ratio (LLR) or 9-bit inphase and quadrature two's complement input data
  • Programmable signal points
  • Up to 256 iterations
  • Scaled min-sum Gauss-Seidel decoding algorithm
  • Optional power efficient early stopping
  • Parity check output
  • Xilinx 7-Series: 17,832 LUTs, 49 18KB BlockRAMs. Altera Stratix-II 17,853 ALUTs, 168 M4K; Cyclone IV: 30,930 LEs, 120 M9K; Cyclone V: 17,435 ALUTs, 121 M10K.
  • Available as EDIF and VHDL core for Xilinx FPGAs under SignOnce IP License. Custom ASIC, Intel/Altera, Lattice, and Microchip/Microsemi/Actel cores available on request.
  • Free simulation software

Block Diagram

LCD01G block diagram

Applications

  • Mobile satellite communications

What’s Included?

  • All Licenses
    • EDIF Core for Virtex-II, Spartan-3, Virtex-4
    • VHDL Core for Virtex-5, Spartan-6, Virtex-6, 7-Series, UltraScale, UltraScale+
    • Test vector generator
  • ASIC License
    • VHDL ASIC Core

Specifications

Identity

Part Number
LCD01G
Vendor
Small World Communications
Type
Silicon IP

Files

Product Sheet Download

Note: some files may require an NDA depending on provider policy.

Provider

Contact Small World Communications

Learn more about Channel Coding IP core

Practical Considerations of LDPC Decoder Design in Communications Systems

This paper covers some practical aspects of designing the LDPC decoder starting from comparison between different techniques, different decoders parameters or standards, the effect of those parameters on the LDPC performance, also it discusses the algorithm selection process, and floating point implementation process.

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Frequently asked questions about Channel Coding IP cores

What is GMR-1 High Speed LDPC Decoder?

GMR-1 High Speed LDPC Decoder is a Channel Coding IP core from Small World Communications listed on Semi IP Hub.

How should engineers evaluate this Channel Coding?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this Channel Coding IP.

Can this semiconductor IP be compared with similar products?

Yes. Buyers can compare this product with similar semiconductor IP cores or IP families based on category, provider, process options, and structured technical specifications.

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