Product Description
The Backhaul Low Density Parity Check (LDPC) core IP provides a high-performance forward error correction (FEC) solution for mobile backhaul modems. The core supports multiple modulations, frame lengths, and spectral efficiencies, thereby allowing a diverse set of profiles from which a user can adapt their backhaul modem solution. Seamless transitions between each of these profiles is supported to facilitate adaptive coding and modulation (ACM). AXI-Streaming interfaces allow for simple integration of this core into any given backhaul modem.
Key Features and Benefits
- Supports the following modulations: QPSK, 8-QAM, 16-QAM, 32-QAM, 64-QAM, 128-QAM, 256-QAM
- Supports 3 frame lengths: 4096 symbols/frame, 2048 symbols/frame, 1024 symbols/frame. The smaller frame lengths correspond to lower latency
- Supports multiple sets of spectral efficiencies for each modulation
- Core includes an encoder and a decoder sub-component. The encoder includes I/Q constellation mapping logic, while the decoder includes logarithmic likelihood ratio (LLR) calculation logic
This IP Core has been discontinued. Effective Date 2/28/2018
- The encoder is low latency and supports continuous transmission of symbols
- Provides symbol error count statistics during decoding
- Supports a maximum frequency of 300 MHz
- Supports AXI-Streaming interfaces