The performance of LDPC coded frequency hopping system under follower jamming

Follower jamming is a class of jamming way which is very harmful to the frequency hopping system. Low density parity check (LDPC) code is employed in frequency hopping system to combat follower jamming in this paper. The characteristics of follower jamming is introduced firstly, and then the model of LDPC coded FH system is built. The classical Progressive edge growth algorithm is used to construct the parity check matrix of LDPC code, and the sum-product algorithm is applied to obtain the optimum decoding performance. The simulation results show that the proposed system has outstanding anti-jamming capability, which is also compared with the traditional Reed-Solomon (RS) coded system.