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Low Density Parity Check Code for OFDM Transmission Using Bit Flipping and Sum Product Algorithm

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LDPC code is a powerful FEC coding scheme with good error performance under very low BER. For implementation in OFDM scheme, particular decoding algorithm is needed. The project is to implement FEC for OFDM and analyze the system performance with LDPC codes along with two decoding algorithm on OFDM over a AWGN channel. Bit flipping (BF) and sum product algorithm (SPA) are compared for their decoding performance. The parameter used for observation are BER over EbN0. The results obtained shows that the LDPC codes on OFDM can reduce error 1.5% in average compared with without LDPC. Also that SPA decoding can perform better than the BF.
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Keywords: Bit Flipping; LDPC; OFDM; Sum Product Algorithm

Document Type: Research Article

Affiliations: Department of Electrical Engineering, Universitas Al Azhar Indonesia, Jakarta, Indonesia

Publication date: April 1, 2017

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