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F-LDPC

TrellisWare has developed a family of products based on our F-LDPC codes to meet the very high data throughput demands of modern communication and storage systems, providing a highly flexible FEC solution that does not compromise perfor­mance. These products offer near capacity threshold performance and low error floors at low complexity, making them the ideal FEC choice for many applications, including robust military communications, commercial terrestrial communications, satellite communications, magnetic and holographic storage systems, several gigabit per second point-to-point wireless communications, etc.

The F-LDPC is available as encoder and decoder cores for FPGA/ASIC implementations. The inherent flexibility of the F-LDPC means that the cores are highly configurable on the fly. Standard cores support 8 block sizes, 40 code rates, and 4 modulation types that can be varied on a block by block basis. Additional block sizes can easily be supported by these cores as well. It usually takes a few days to add a new block size to the offering. Through Log Likelihood Ratio inputs, the F-LDPC cores also support virtually any digital modulation type.

TrellisWare’s F-LDPC products were showcased during MILCOM 2006, where we demonstrated the high- speed error-decoding capability of the F-LDPC by encoding a 1Gbps raw digital video-stream, corrupting the stream with noise, and decoding the stream before displaying it on a monitor. The visual integrity of the displayed video is a qualitative indicator of the F-LDPC’s performance. Please click here to download our MILCOM brochure.

Key Features

  • Highly flexible in terms of block size, code rate and modulation types
    • Same decoder architecture supports any combination
  • Excellent performance
    • Near capacity threshold performance for all block sizes and code rates
    • Excellent floor/flare performance
  • Highly configurable and customizable
    • Custom block sizes and code rates are added readily to standard decoders
    • Block sizes, code rates and modulation types can be changed on a block-by-block basis during operation
  • Very high data throughputs
    • Up to 1 Gbps in a single FPGA
    • ASIC implementations can result in much higher throughputs
  • Low complexity
    • Complexity for a given throughput or flexibility can be shown to be lower than other advanced FEC technologies

In addition to the off-the-shelf F-LDPC products, TrellisWare also builds customized F-LDPC decoders based on specific customer requests. Contact us with your specific FEC requirements. 


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TrellisWare offers a wide range of off-the-shelf F-LDPC products that are flexible enough to improve performance in virtually any application.

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TrellisWare offers a wide range of off-the-shelf F-LDPC products that are flexible enough to improve performance in virtually any application.

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