USRP 2901 Based FM Transceiver with Large File Capabilities in Virtual and Remote Laboratory

Int. J. Online Eng. Pub Date : 2018-10-26 DOI:10.3991/IJOE.V14I10.8283

U. Somanaidu, N. Telagam, Nehru Kandasamy, Menakadevi Nanjundan

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引用次数: 6

Abstract

The radio signal processing capability can be provided by Universal software radio peripheral (USRP) hardware. The received signal frequency can be controlled and transmitting the signal through wireless is possible by installing NI USRP utility configuration. The programmable USRP was running VI snippet program in block diagram panel with radio companion integrated through USB cable on windows 7 64 bit OS. With the parameters such as IQ rate, transmitter gain, carrier frequency along with device name which is given as ni2901_1 the students can able to tune the radio signal. In addition to this the students can able to record the FM signal and extract the IQ data and plot the spectrum of signal and analyze it using graph palette. The standard FM equation contains the modulation index, carrier frequency, message signal amplitude, frequency deviation and frequency sensitivity can also analyzed using LabVIEW. By using Carson’s rule the bandwidth of wideband FM signal can be calculated. In this project RF0 module is used USRP device is connected with dual band vertical antenna with 2.4 and 5GHz frequency as Tx1 and the receiver is connected to Tri band vertical antenna with 144, 400 and 1200 MHz. while transmitting red color will blink in the device for transmitting and green color indicates the received signal. The purpose of doing this experiment was to gain experience in signal processing and receive hands on experience with the USRP. This VI snippet program will support all file formats. Up sample we used in front panel should be -1 always and if large size files is transmitted the value should be increased. The iPhone received the signal with high quality using ear pods the students can able to listen all the information which is transmitted through USRP. Here the transmitted frequency we used in the front panel is 94.7 MHz. The transmitted signal through USRP is successfully tested in the campus of Institute of Aeronautical Engineering, Hyderabad, India.

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基于USRP 2901的虚拟远程实验室大文件调频收发机

无线电信号处理能力可由通用软件无线电外设(USRP)硬件提供。通过安装NI USRP实用程序配置，可以控制接收信号的频率，并通过无线传输信号。可编程USRP在windows 7 64位操作系统的框图面板上运行VI代码片段程序，通过USB电缆集成无线电伴侣。利用IQ率、发射机增益、载波频率等参数以及设备名称ni2901_1，学生可以对无线电信号进行调谐。除此之外，学生还可以记录调频信号并提取IQ数据，并使用图形调色板绘制信号的频谱并进行分析。标准调频方程包含调制指数、载波频率、报文信号幅度、频率偏差和频率灵敏度，还可以使用LabVIEW进行分析。利用卡森法则可以计算宽带调频信号的带宽。本项目采用RF0模块，USRP设备连接频率为2.4 ghz和5GHz的双频垂直天线作为Tx1，接收器连接频率为144,400和1200mhz的三频垂直天线。发射时，设备中红色闪烁表示发射，绿色表示接收到信号。做这个实验的目的是获得信号处理的经验，并获得USRP的实践经验。这个VI代码片段程序将支持所有文件格式。我们在前面板中使用的向上样本应该总是-1，如果传输大尺寸文件，该值应该增加。iPhone使用耳机接收高质量的信号，学生可以听到通过USRP传输的所有信息。这里，我们在前面板中使用的传输频率是94.7 MHz。通过USRP传输的信号在印度海得拉巴航空工程学院校园内成功测试。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Int. J. Online Eng.

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