Design of Enhanced Multi-bit Threshold Bit Flipping Algorithm for Low Complex Ldpc Decoders

Communication is transfer of information from source to sink or sender to receiver. The signal when transferred through the noisy channel gets affected by the noise and becomes an error signal when it reaches the receiver. Decoding is the process of retrieving the correct information from the received signal. The weighted bit flipping LDPC decoding algorithm gives a good performance in retrieving information. The proposed algorithm which is modified multi bit threshold weighted bit flipping decoding (MMTWBF) algorithm of low density check code (LDPC) gives a good performance and an effective practicability in comparison with reliability rate weighted bit flipping algorithm (RRWBF) and good speed compared to multi-bit threshold rate based weighted bit flipping algorithm(MTRWBF). This algorithm flips the plurality of bits at each time, which helps in reducing the shortcomings in improved reliability rate weighted bit flipping algorithm (IRRWBF) decoding convergence speed. The simulation results reveal the improvement in simulation speed and the decoding iteration is reduced.