Performance Simulation of the BD-TFS-OFCDM Wireless Communication System in Mine Tunnel

To improve the low reliability of wireless communication caused by the dense multipath and Doppler effect,a more stringent TFS-OFCDM method based on ZK TFS-OFCDM was proposed.When the number of orthogonal subcarriers was larger than the length of orthogonal spread spectrum sequence,BD-TFS-OFCDM was developed from TFS-OFCDM.The simulation results show that: TFS-OFCDM was better than ZK TFS-OFCDM in the same condition;With the same number of users,BD-TFS-OFCDM got the best performance and the strongest resistance to MAI;With the same length of spreading code,BD-TFS-OFCDM got the biggest user capacity.