基于CRC校验的高速长线LVDS传输设计

摘要

In view of the low reliability in the high-speed and long distance data transmission,put forward a new de⁃sign is put forward for reliable high-speed and long-term LVDS data transmission system with CRC checksum. This design uses LVDS as high speed data transmission interface,joins the equalization circuit compensating losing of data remote transmission in hardware circuit design and adds the CRC error detection code and the feedback error correction mechanism(ARQ)improving the reliability of data transmission in logic design. In order to reduce loss of the data bandwidth in the transmission system,optimize the old ARQ working,ensure the high speed data transmis⁃sion. After testing,the system work stable,and serial data of the rate of 400 Mbit/s can realize zero transmission er⁃ror rate in the 40 m transmission line consisting of four 10 m shielded twisted pairs.%针对数据在高速远距离传输中存在可靠性低的问题，提出了一种带CRC校验的高速长线LVDS数据传输系统设计。该设计以LVDS作为高速数据传输接口，在硬件电路设计上加入均衡电路，补偿数据远距离传输损耗，并在逻辑设计上加入CRC检错码，将反馈纠错机制（ARQ）运用在传输系统中，提高数据传输的可靠性，同时改进传统反馈纠错机制工作方式，降低数据带宽损耗，保证数据高速传输。经试验验证，该系统工作稳定，串行数据以400 Mbit/s的速率，在由4段10 m屏蔽双绞线组成的40 m传输线上可实现零误码率传输。