Perbandingan Kinerja LDPC (Low Densiti Parity Check) Dengan Metode Decoding Bit Flip Pada Kanal AWGN dengan Multipath Fading

摘要

As an effect of the globalization era, telecomunication technology, especially in wireless comunication system is forced to prepare high data rate with reliable Quality of Services (QOS) with Low Bit Error Rate (BER) and very small power. The problem in mobile comunication is AWGN and multipath fading, which affected the rising of error data receive on receiver side. This final project to compare the coding tehnique�s Low Density Parity Check Code (LDPC) on AWGN and multipath fading. Encoding on transmitter with sparse matrx method based on Approximation Lower Triangular in coderate ½, while decoding apply with decoding bit flip. With a different matrix size, the result of LDPC isn�t to variably in LDPC performance. At different iteration, more iteration influence LDPC with the result that good.BER acquired 10-5 in AWGN channel acquired at average values 2.058 dB. Where as in multipath fading channel 6.2 dB, It could be declare that LDPC code has better performance through AWGN better than multipath fading channel with use decoding method bit flip. Keywords : Low Density Parity Check Code, sparse matriks based on Approximation Lower Triangular, AWGN channel, Multipath fading, decoding bit flip, BER (Bit Error Rate)