According to the application characteristics of the wireless sensor network

the encoder and decoder algorithms of LDPC code are analyzed

the design methods of LDPC code used in wireless sensor network nodes are presented

in which (n

3

6) regular LDPC code

PEG-QC parity-check matrix

RU encoder algorithm

and Log-BP decoder algorithm are adopted.Finally

the methods are simulated on MATLAB

and the simulation results indicated that the methods are effective.