外文翻譯---基于eda技術(shù)的hdb3編碼器的設(shè)計與實現(xiàn)-全文預(yù)覽
【正文】 cycle that electronic design automation and artificial technology of the circuit can narrow the products at the same time, reduce the mistake that may happen, improve development benefit of the munication products. Practice show, use FPGA e, realize the intersection of NRZ and yard to the intersection of HDB3 and conversion of yard than adopt the specialized integrated circuit debug and bring convenience, defect of overing the interferencefree difference that the circuit of the discrete hardware brings and difficult to adjust etc., it is short, with low costs and have software development period, it is high to carry out the speed, the realtime character is strong, upgrade characteristics such as convenience, etc. And can integrate this circuit and its decoding circuit and other functions circuit in the same FPGA chip, having reduced the number of connecting the ponent, has improved the integrated level, and there is very great programming flexibility, very strong transplantation, so there is very good application prospect. 6 基于 EDA 技術(shù)的 HDB3編碼器 的 設(shè)計 與 實現(xiàn) 摘要 HDB3碼是數(shù)字基帶通信系統(tǒng)的重要組成部分之一，因為它沒有直流組成， 功能強大，有糾錯能力， 具有 時鐘恢復(fù)等性能優(yōu)勢，是 ITU 建議使用的基帶類傳輸碼 型之一 。 1 Design based on HDB3 encoder of EDA technology and realizing Summary HDB3 yard is one of the important ponents in digital baseband munication system, because it does not have directflow positions, it is strong to examine the ability by mistake, have advantages such as performance of clock recovery, etc, remend the baseband that uses to transmit one of the yard types as ITU. Have introduced principle and method of HDB3 code at first, has proposed a method based on HDB3 encoder of EDA technology, have simple, with low costs circuit, development period is short, it is high to carry out the speed, upgrade characteristics such as convenience, etc. Foreword Thirdorder highdensity bipolar code is an important serial data transmission encoding, digital munication is an important part of the system. And the most mon NRZ code, pared, HDB3 code has many advantages, such as: eliminating the DC ponent NRZ code with clock recovery and better antijamming performance, making it more suitable for longdistance channel transmission. At the same time, HDB3 error detection code has a strong ability to use HDB3 code when the data transfer sequence, if a single bit error occurs during transmission, the law of alternating polarity will be destroyed, so the receiver HDB3 code based on the unique law characteristics, can be detected the error and correct the error, and facilitate the extraction of HDB3 code bit timing information. HDB3 code as data transmission and thus a pattern, widely used, as ITU remended pattern one. HDB3 coding performed by the realization of a variety of ways, the mon solution is applicationspecific transceiver chip HDB3, such as the selection of specific E1 transceiver and MCU DS2153Q the conversion of the code system. This article provides a the use of modern EDA technology to ACEX series FPGA chip EPlK10 for the hardware platform for the Quartus II software platform to VHDL, for the development of tools for FPGA implementation of the HDB3 encoder des
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