Abstract:

An LDPC error correcting cipher for multi-user multiple-input multiple-output-orthogonal frequency division multiplexing (MIMO-OFDM) system is presented by combining the advanced encryption standard (AES) which has a quite high security with the low density parity check code (LDPC) which has good performance in the field of communication. The LDPC error correction cipher is a block cipher which has 256 bit block cipher based on a six round and uses the wide trail strategy. The key contains 128 bit AES key and an  LDPC  check matrix. The analysis of security and error correction capacity in condition of discrete cosine transform (DCT)MIMO-OFDM are shown at the end of this paper. Simulation results show that this strategy has a very high performance in security and error correction by the good transmission performance.