摘要
通常由信源发出的数字基带信号含有较多的低频分量,甚至带有直流分量,这些信号由于易产生码间干扰进而直接影响传输的可靠性,所以一般不宜直接用于传输。HDB3码(三阶高密度双极性码)是基带传输码型之一,其具有编码规则简单、无直流分量、低频分量少、连0数不超过三个、提取同步方便等优点,有利于信号的恢复和检验。文章提出HDB3码的编码和译码算法思想,并在matlab平台上得到了验证。
Usually the source of the letter digital baseband signal contains more low frequency component even with the DC component.Due to easy to generate intersymbol interference which directly influence the reliability of the transmission,These signals are not suitable for transmission.HDB3 code is one of the baseband transmission code.It has many advantages such as simple coding rule,no DC component,low frequency components,continuous 0 number less than three and convenient extraction of HDB3 code synchronization,which is conducive to the signal recovery and inspection.This paper presents the HDB3 code encoding and decoding algorithm,which has been verified in the MATLAB platform.
出处
《石油仪器》
2012年第5期20-22,8,共3页
Petroleum Instruments
