A high throughput and low BER implementation method in TG wireless transmission system

Along with the development of high-speed railway, higher and higher technical requirements for the mobile communication system in it are raised. Communication Based Train Control (CBTC) will be based on mobile communication, of which the key problem is how to support high reliability of data transmission in order to improve utilization of tracks and enhance train´s safety. The applications of LDPC in reliable high-speed data transmission which serves fault monitor and early-warning system in train-ground (TG) wireless communication are proposed. The design of high-throughput and complexity reduction for regular and irregular LDPC codes has been considered in decoding algorithm and architectural in order to accord with the performance of reliable train-ground information transmission. A parallel message updates and implement method are presented for LDPC decoder of train-ground system that bring negligible loss in performance compared to the ideal case. A new implement method which is designed of very large scale integration have been proposed in this paper. The LDPC decoder has been applied in reliable train-ground high throughput fault monitor and digital early-warning communication system. Testing result demonstrates that the proposed architecture achieves a throughput of 18.629Mbps, which meets the performance requirements of reliable high data transmission and higher throughout.