Digital baseband signal transmission is a digital communications system, an important component. In digital communication, there are some occasions, may from time through the carrier modulation and demodulation process, the base-band signal for direct transmission. AMI code signal using alternating inversion, there may be four to zero with the phenomenon, which is not conducive to the receiving end of the timing signal extraction. The HDB3 code because of its non-DC components, low-frequency components, and even a small number of 0 up to more than three characteristics, while the timing signal recovery is very favorable, and has become CCITT Association recommended one of baseband transmission pattern. In this paper the use of VHDL language for data transmission system in the HDB3 encoder has been designed. Based on the signal generator to achieve to reach to reach the source

极性转换.txt
hdb3编码源程序完整版.txt
插B.txt
插V.txt

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