IEEE 802.16e (WiMAX) LDPC Encoder IP core

Error-correcting coding is an essential tool for enabling reliable communication. Unicore Systems provide an Intellectual Property (IP) core for efficient implementation of low-density parity-check (LDPC) forward error correcting (FEC) encoding schemes intended for the IEEE 802.16e. The IP core covers the entire WiMAX LDPC specification, in terms of block size and code rate. Block size and code rate can be switched on on a block-by-block basis.

The decoder design is fully synchronous on a single input system clock. IP core contains input and output buffer to ease integration
into user system. Simulation software (runs under Windows OS) delivered with this IP core implements exact fixed point model of LDPC encoder and can be used for performance simulation and test vector generation for verification.

Main features:

• 19 code length supported;
• all ratio 1/2, 2/3A, 2/3B, 3/4A, 3/4B, 5/6 supported;
• on the fly change of code length and code ratio;
• encoded throughput up to 600 Mbit/sec (Virtex-4 -12 speed
• grade).
• Low latency