Study of Error Control Method for High Performance Unidirectional Data Transmission

Based on physical isolation technology, a unidirectional zero-feedback data transmission system, UZ-DTS for short, is realized. To improve high speed data transmission reliability, the reasons that result in bit error, data packet loss and coverage are analyzed, and the solutions are also put forward. Based on non-confidence embedded operating system (ARM9), man-machine interface is designed to control transmission process. SPI and L VDS technologies are adopted to construct unidirectional Zero-feedback channel and decrease bit error rate (BER). Double-buffering mechanism is designed in ARM7 to receive, store and forward data packet alternately, while double-thread is made use to decrease data packet loss and coverage rate by reading and writing separately. Test results prove that the method decreases BER and packet loss and coverage rate effectively, and accuracy rate reaches 99.999%, when the transmission rate is 5Mb/s.