Dr.P.Veeraragavan
@aucet.in
physics
Anna university
RESEARCH, TEACHING, or OTHER INTERESTS
Biophysics, Multidisciplinary, Biomedical Engineering, Instrumentation
Scopus Publications
Scopus Publications
S. Lekashri, V. Jacintha, Bestley Joe, A. N. Duraivel, and P. Veeraragavan
IEEE
Reconfigurable FPGA based silicon on chip is designed using flexible digital pre-distortion for software defined radio transceiver in this proposed system. In the Silicon on Chip (SoC) platform the Flexible Digital Pre-distortion (FDP) is implemented along with the generation of real time baseband signal. The model named recollection multinomial constructed FDP explanation is realized for linearization of Radio Frequency (RF) Power Amplifiers (PA) here which makes system more cost effective and dynamic. On basis of the gain and phase coefficients of the Look Up Tables (LUT) the power amplifier behavior is identified. The non-linear coefficients are extracted using memory polynomial model. Therefore the non-delayed normalized mean square error can be achieved through the calculation of system performance and the LUT coefficients are updated. Finally the pre-distorted signal is generated for software defined radio transceiver.
P Madhavasarma, P. Veeraragavan, S. Kumaravel, and M. Sridevi
Elsevier BV
P. Madhavasarma, M. Sridevi, S. Kumaravel, and P. Veeraragavan
Informa UK Limited
ABSTRACT In this work, diagnosing of reunion of human tibia fracture across limbs using a simple mathematical model is demonstrated. At present in practice, the fracture reunion is predicted using repeated radiographs. Frequent exposure to such radiation causes harmful health effects in patients. Hence, as an alternative, modelling technique using electrical data recorded across patients stimulated with DC electric voltage of range 0.1–1V is proposed. Various model structures, namely P1D and P1DZ models were tried. An error analysis was performed and it was observed that the measured data fitted P1DZ model with an error less than 5%. Model parameters namely process gain and time constant were observed. When the model parameter process gain becomes constant, the time constant reduces significantly indicating the healing of fracture. Reunion was also confirmed with simultaneously taken radiographs. The fact that human bone is a biological semi-conductor therefore exhibits electrical properties and bone does behave like a capacitor is proved by empirical methods in our study is the novelty of the work.
S. Arulkumar, P. Madhavasarma, and P. Veeraragavan
IEEE
This paper presents a design and simulation of UPQC system for limitations of non linear load factors. The fuzzy logic controller is designed for tuning the PI controller parameters for achieving the optimal voltage is the solar power connected in the UPQC system. Solar power used to improve the power for load side power system designed in network. The MATLAB simulation software is used for simulation of results. From the simulation results, the Total Harmonics Distortion value is reduced from 2.77% to 1.29% in the voltage side similarly 4.88% to 2.01% in the current side. Also the waveform of the supply system is improved.