Browse Items (67 total)
- Collection: Vol. 18, No. 6 2020
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TELKOMNIKA Telecommunication, Computing, Electronics and Control
Discrete wavelet transform recursive inverse algorithm using second-order estimation of the autocorrelation matrix
The recursive least squares (RLS) algorithm was introduced as an alternative to least mean square (LMS) algorithm with enhanced performance. Computational complexity and instability in updating the autocolleltion matrix are some of the drawbacks of…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Raised cosine/NRZ line coding techniques for upgrading free space optical communication systems through various levels of fog
This study examines raised cosine/NRZ line coding techniques for upgrading free space optical (FSO) communication systems through various levels of fog. The max. Q factors are simulated and estimated for clear air, light fog, and moderate fog weather…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Reconfigurable ultra wideband to narrowband antenna for cognitive radio applications using PIN diode
Frequency reconfigurable antennas are very attractive for many wireless applications. They offer many advantages such as simplicity and compactness. In this electronic paper, we propose a reconfigurable antenna operating in the S and C bands. The…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A novel two-polynomial criteria for higher-order systems stability boundaries detection and control
There are many methods for identifying the stability of complex dynamic
systems. Routh and Hurwitz’s criterion is one of the earliest and commonly used analytical tools analysing the stability of dynamic systems. However, it requires tedious and…
systems. Routh and Hurwitz’s criterion is one of the earliest and commonly used analytical tools analysing the stability of dynamic systems. However, it requires tedious and…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
High frequency signal injection method for sensorless permanent magnet synchronous motor drives
The objective of this project is to design a high frequency signal injection
method for sensorless control of permanent magnet synchronous motor
(PMSM) drives. Generally, the PMSM drives control requires the appearance of speed and positon sensor…
method for sensorless control of permanent magnet synchronous motor
(PMSM) drives. Generally, the PMSM drives control requires the appearance of speed and positon sensor…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
An improved swarm intelligence algorithms-based nonlinear fractional order-PID controller for a trajectory tracking of underwater vehicles
This paper presents a nonlinear fractional order proportional integral
derivative (NL-FOPID) for autonomous underwater vehicle (AUV) to solve the path tracking problem under the unknown disturbances (model uncertainty or external disturbances). The…
derivative (NL-FOPID) for autonomous underwater vehicle (AUV) to solve the path tracking problem under the unknown disturbances (model uncertainty or external disturbances). The…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
New prediction method for data spreading in social networks based on machine learning algorithm
Information diffusion prediction is the study of the path of dissemination of news, information, or topics in a structured data such as a graph. Research in this area is focused on two goals, tracing the information diffusion path and finding the…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Medical remotely caring with COVID-19 virus infected people using optimized wireless arm tracing system
A human arm makes many functions that a robotic arm always programmed to make same functions. The human limbs motion can be captured using sensors that they will always copy hand movement. The rapid spread of the Coronavirus (COVID-19) virus and…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Improving face recognition by artificial neural network using principal component analysis
The face-recognition system is among the most effective pattern recognition and image analysis techniques. This technique has met great attention from academic and industrial fields because of its extensive use in detecting the identity of…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Spectral opportunity selection based on the hybrid algorithm AHP-ELECTRE
Due to an ever-growing demand for spectrum and the fast-paced development of wireless applications, technologies such as cognitive radio enable the efficient use of the spectrum. The objective of the present article is to design an algorithm capable…