关键词: 1000BASE-X, 物理编码层, 物理层系统, 8B/10B编码算法

Abstract: The design of 1000BASE-X physical coding layer and physical layer system is introduced. In order to solve the problem of baseline drift and code stream imbalance during high-speed fiber transmission, 1000BASE-X physical coding layer adopts 8B/10B coding algorithm. For the analysis of 8B/10B coding rules and 8B/10B coding intrinsic correlation, an 8B/10B encoder combining table lookup method and combinatorial logic method is designed. The encoding algorithm is implemented by hardware language Verilog HDL, the simulation and functional simulations are carried out on Modelsim and QuartusII. The results show that the method has small logic resource area, fast coding speed and high reliability.

Key words: 1000BASE-X, physical coding layer, physical layer system, 8B/10B encoding algorithm