Research Article | OPEN ACCESS
Design and Implementation of Digital Signal Transmission Performance Analyzer Based on FPGA
1Guoping Zhang and 2Mande Xie
1Department of Information Science and Technology, Zhejiang Sci-Tech University
2Department of Computer and Information Engineering, Zhejiang Gongshang
University, Hangzhou, Zhejiang, 310018, China
Research Journal of Applied Sciences, Engineering and Technology 2013 6:1991-1997
Received: July 12, 2012 | Accepted: September 03, 2012 | Published: February 21, 2013
Abstract
Digital signal transmission analyzer is mainly used for testing the transmission quality of digital communications signal and it usually composed of digital signal generator, pseudo-random signal generator, low-pass filter and digital signal analysis circuit. This study adopts FPGA to implement the digital signal generator and pseudo-random signal generator, as well as to implement the shift register to generate the required M sequence. By changing the low-pass filter cutoff frequency and the amplitude of the pseudo-random signal to analog transmission environment and signal analysis portion consists of the digital signal analysis circuit. The digital signal analysis module extracts the sync signal and produces synchronization scan signal by using the synchronous clock, as the outside trigger signal of oscilloscope to display the eye diagram of the digital signal stably. To analyze the degree of interference and the strength of inter-symbol interference by observing the eye diagram, thus this study implements the performance test for digital signal transmission.
Keywords:
DSP builder, eye diagram, FPGA, low-pass filter, M sequence,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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