Pipelined Implementation of a Real Time Programmable Encoder for Low Density Parity Check Code on a Reconfigurable Instruction Cell Architecture
In this paper, the authors present pipelined implementation of a real time programmable irregular Low Density Parity Check (LDPC) Encoder as specified in the IEEE P802.16E/D7 standard. The encoder is programmable for frame sizes from 576 to 2304 and for five different code rates. H matrix is efficiently generated and stored for a particular frame size and code rate. The encoder is implemented on reconfigurable instruction cell architecture which has recently emerged as an ultra low power, high performance, ANSI-C programmable embedded core. Different general and architecture specific optimization techniques are applied to enhance the throughput.