A Proposed Implementation of Raptor Code using a Microcontroller

Abstract

This paper, discuss raptor code implementation using a microcontroller. The work considers raptor code constructed from serial concatenation between two codes; these two codes are error-correcting. The first code is the low-density parity-check code LDPC code, and the second is the Luby transform code LT code. This work focus on compatibility concept of serially concatenated codes. The compatibility between two codes considers the matching of the code rate between two serially concatenated codes. The work discusses multiple cases of code rates with different modulation schemes. The simulation of each case of serial concatenation investigated and analyses using MATLAB. The simulation results show that raptor code provides excellent performance of Bit error rate BER vs SNR through AWGN channel. This work also introduces the raptor code implementation using a microcontroller. The implementation includes both raptor code system transmitter and receiver. The implementation uses a bit flipping decoding algorithm in the system receiver. The raptor code implementation tested in both transmitter and receiver using random input data; the decoding process provides output precisely the same as the input message without errors.