The purpose of this final project is to analyze the performance of Low Density Parity Check Code for CDMA system. The analyze is to compare the simulation program of LDPC-CDMA with different parity check matrix LDPC and different amount of active user. The comparison for the system is compare based on Bit Error Ratio for the systems. So it could be declare with using what decoding method it can perform better. For the result of Bit Error Rate, the system LDPC for CDMA with different matrix has different value too. For the small matrix of LDPC has value of BER smaller than bigger matrix of LDPC. Then, for amount of many active user that has BER many too with equal little of active user. Key Words : LDPC, CDMA, BER, Bit Flip, Sum Product
