Browse Items (66 total)
- Collection: Vol. 18, No. 5 2020
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TELKOMNIKA Telecommunication, Computing, Electronics and Control
Pulse shaping methods for inter carrier interference reduction in OFDM system
The weakness of the orthogonal freuency division multiplexing (OFDM)
system is susceptible to the existence of carrier frequency offset (CFO) which causes the emergence of inter carrier interference (ICI) which causes a degradation of performance…
system is susceptible to the existence of carrier frequency offset (CFO) which causes the emergence of inter carrier interference (ICI) which causes a degradation of performance…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Hand gesture recognition using discrete wavelet transform and hidden Markov models
Gesture recognition based on computer-vision is an important part of
human-computer interaction. But it lacks in several points, that was image brightness, recognition time, and accuracy. Because of that goal of this research was to create a hand…
human-computer interaction. But it lacks in several points, that was image brightness, recognition time, and accuracy. Because of that goal of this research was to create a hand…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Gender voice classification with huge accuracy rate
Gender voice recognition stands for an imperative research field in acoustics and speech processing as human voice shows very remarkable aspects. This study investigates speech signals to devise a gender classifier by speech analysis to forecast the…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Performance analysis of negative group delay network using MIMO technique
This study introduces comparative consequences that determine the bit error rate enhancements, resultant from adopting a proposed MIMO wireless model in this study. The antenna configurations for this model uses new small microstrip slotted patch…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Excellent color quality of phosphor converted white light emitting diodes with remote phosphor geometry
The advantage in using a remote phosphor design in a WLED package is
the superior luminous flux to that of the conformal and in-cup phosphor
geometries. However, the disadvantage is its color quality which is lower than the results from the other…
the superior luminous flux to that of the conformal and in-cup phosphor
geometries. However, the disadvantage is its color quality which is lower than the results from the other…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
The influences of calcium fluoride and silica particles on improving color homogeneity of WLEDs
The LEDs lighting device with phosphor ingredient (pcLEDs) is among
the most common lighting methods in recent years and evaluated by chromatic uniformity and lighting capacity. Therefore, we introduce the phosphor particles that can improve the…
the most common lighting methods in recent years and evaluated by chromatic uniformity and lighting capacity. Therefore, we introduce the phosphor particles that can improve the…
TELKOMComparison of calcium carbonate and titania particles on
improving color homogeneity and luminous flux of WLEDsNIKA Telecommunication, Computing, Electronics and Control
In this paper, the experiments on phosphor-converted LEDs (pc-LEDs) with a correlated color temperature (CCT) of 8500K has been conducted with the scattering enhancement particles (SEPs) to achieve the higher color uniformity and emitted luminous…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
The options in remote phosphor structure for better white LEDs color quality
The WLEDs configuration with remote phosphor layers has higher
luminescent performance than WLEDs with dispense coating or conformal coating and is applied for many modern devices. However, managing the chromatic performance of lighting structure…
luminescent performance than WLEDs with dispense coating or conformal coating and is applied for many modern devices. However, managing the chromatic performance of lighting structure…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
Viterbi optimization for crime detection and identification
In this paper, we introduce two types of hybridization. The first contribution is the hybridization between the Viterbi algorithm and Baum Welch in order to predict crime locations. While the second contribution considers the optimization based on…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
On-chip ultra low power optical wake-up receiver for wireless sensor nodes targeting structural health monitoring
Wireless sensor network (WSN) consists of distributed nodes deployed
for monitoring the physical conditions and organizing collected data at
the central control unit. Power consumption is the challenges in WSN as
the network consists of wireless…
for monitoring the physical conditions and organizing collected data at
the central control unit. Power consumption is the challenges in WSN as
the network consists of wireless…