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Ravinder, Y.
- A Digital Radio System for TV White Spaces with Frequency and Transmission Bit Rate Agility
Abstract Views :286 |
PDF Views:3
Authors
C. J. Andhare
1,
Y. Ravinder
2
Affiliations
1 Pune Institute of Computer Technology, Maharashtra, IN
2 Pune Institute Computer Technology, Maharashtra, IN
1 Pune Institute of Computer Technology, Maharashtra, IN
2 Pune Institute Computer Technology, Maharashtra, IN
Source
Wireless Communication, Vol 7, No 8 (2015), Pagination: 256-259Abstract
In this paper, we have proposed the method to maintain the performance of the radio system, even after switching the order of modulation scheme and the frequency of operation, for TV white space using LabVIEW and USRP. It operates within 470-806 MHz. At each frequency, SNR and BER are calculated for BPSK, QPSK and 8-PSK and these calculated values are supplied to the transmitter which helps it to choose the proper gain of power amplifier so that BER will be constant even after switching of transmitter from lower to higher order modulation scheme and vice versa. This concept provides an additional feature to the Cognitive Radio operated in TV white spaces.Keywords
TV White Spaces, Cognitive Radio, Universal Software Radio Paeripheral.
- Testbed Implementation of Multi Dimensional Spectrum Sensing Schemes for Cognitive Radio
Abstract Views :180 |
PDF Views:2
Authors
Affiliations
1 Department of Electronics and Communication Engineering, Rajarshi Shahu College of Engineering, IN
2 Department of Electronics and Telecommunication Engineering, Pune Institute of Computer Technology, IN
1 Department of Electronics and Communication Engineering, Rajarshi Shahu College of Engineering, IN
2 Department of Electronics and Telecommunication Engineering, Pune Institute of Computer Technology, IN
Source
ICTACT Journal on Communication Technology, Vol 7, No 2 (2016), Pagination: 1289-1294Abstract
Cognitive Radio (CR) is a promising technology to exploit the underutilized spectrum. Spectrum sensing is one of the most important components for the establishment of cognitive radio system. Spectrum sensing allows the secondary users (SUs) to detect the presence of the primary users (PUs). The aim of this work is to create a CR environment to study the spectrum sensing methods using Universal software radio Peripheral (USRP) boards. In this paper a novel method of estimation of spectrum opportunities in multiple dimensions especially the space and the angle dimensions are carried out on USRP boards. This paper typically provides the experimental results carried out in an indoor wireless environment. To enhance the sensing performance the space dimension is firstly studied using spatial diversity of the cooperative SUs. Secondly the receiver diversity is analyzed using multiple antennas to enhance the error performance of the wireless system. The spectrum usage is also determined in the angle dimension by investigating the direction of the dominant signals using MUSIC algorithm.Keywords
Cognitive Radio, Multi-Dimensional Sensing, Diversity, USRP, MUSIC Algorithm.- Testbed Implementation of Energy Efficient Multi Antenna System and its Performance Evaluation
Abstract Views :209 |
PDF Views:3
Authors
Affiliations
1 Department of Electronics and Telecommunication Engineering, Pune Institute of Computer Technology, IN
1 Department of Electronics and Telecommunication Engineering, Pune Institute of Computer Technology, IN
Source
ICTACT Journal on Communication Technology, Vol 8, No 4 (2017), Pagination: 1650-1655Abstract
With the recent development and requirement for high-speed wireless communications, the demand of energy has increased exponentially in order to support required quality of service (QoS). Multiple Input Multiple Output (MIMO) technique gaining more popularity in current communication network, since it provides advantages in terms of higher data rates and maximum capacity with the cost of more energy consumption. In this paper, QAM modulation scheme is analyzed as the best modulation scheme for the total energy required to transmit the given number of bits is reduced. A SDR testbed has been built to implement Almouti coded MIMO system using LABVIEW and Universal Software Radio Peripheral (USRP) platform. The analysis was then extended to evaluate the energy consumption of the system where it was observed that by minimizing the transmission power the energy requirement of the system gets reduced. Then the system efficiency in terms of transmit power was evaluated using USRP. It has been observed that by adjusting carrier frequency transmit power of the system gets reduced up to 25%.Finally the performance of the system is evaluated by demonstrating the effect of transmission distance, symbol rate, spectral efficiency and circuit power on energy consumption of the system using LABVIEW math script.Keywords
Energy Efficiency, MIMO, Symbol Rate, Spectral Efficiency, USRP.References
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