Abstract
Digital Audio Broadcasting (DAB) is an amazing technology, achieving its promise of certainly delivering high quality digital audio in the most vindicate mobile and fixed receiver environments. 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 the VI snippet program in block diagram panel with radio companion integrated through USB cable on windows 7 64. 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. DAB technology is integrated with USRP device using prominent OFDM technique for promise delivery of high quality audio signal. DAB works under four transmission modes in this paper. In this paper RF0 module is used USRP device is connected with dual band vertical antenna with 2.4 and 5GHz frequency as Tx1. This transmitting VI snippet program will support all file formats such as.wav, mp3, etc. the intention of the paper is to transmit the real time data through long distance using DAB technology in remote laboratory. The proposed system is implemented in virtual lab so that it can be accessed by any user from anywhere. This system is successfully tested on institute of aeronautical engineering virtual lab.
Highlights
Virtual and remote laboratories reflect a movement among education institutions to make the equipment and elements of a physical science laboratory more available to learners from any location, via the web
There are many digital audio broadcasting standards in the world, such as DAB (Digital Audio Broadcasting) in Band III and Band L [3].Software radios are emerging as platforms for multiband multimode personal communications systems
Software-defined radios (SDRs) promise unprecedented flexibility, but their architecture has proven to be a challenge for MAC protocols [5]
Summary
Virtual and remote laboratories reflect a movement among education institutions to make the equipment and elements of a physical science laboratory more available to learners from any location, via the web. Users are able to manipulate the equipment and watch the activities unfold via a webcam on a computer or mobile device This provides students with a realistic view of system behavior and allows them access to professional laboratory tools from anywhere, whenever they need. Virtual and remote labs reduce the costs associated with conventional hands-on labs due to their required equipment, space, and maintenance staff. They provide additional benefits such as supporting distance learning, improving lab accessibility to handicapped people, and increasing safety for dangerous experimentation. The kernel oriented macro based Software defined radio architecture provides a configurable and programmable hardware platform to implement multiple wireless standards, services and applications [7]. Digital audio signal is broadcasted in rural area with gfdm transceiver using software defined radio and plotted the graphs [11]
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