针对数字基带传输系统中HDB3信号的特点，采用基于FPGA的Verilog HDL语言，实现HDB3数字基带信号的编码器设计,共有插V、插B、单双极性变换模块，最终能在FPGA实现。-For digital baseband transmission system HDB3 signal characteristics, based on FPGA Verilog HDL language, designed to achieve HDB3 encoder digital baseband si