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TELKOMNIKA Telecommunication, Computing, Electronics and Control
A principal component analysis-based feature dimensionality reduction scheme for content-based image retrieval system
In content-based image retrieval (CBIR) system, one approach of image
representation is to employ combination of low-level visual features cascaded together into a flat vector. While this presents more descriptive information, it however poses…
representation is to employ combination of low-level visual features cascaded together into a flat vector. While this presents more descriptive information, it however poses…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A power efficient delta-sigma ADC with series-bilinear switch capacitor voltage-controlled oscillator
In low-power VLSI design applications non-linearity and harmonics are
a major dominant factor which affects the performance of the ADC. To avoid this, the new architecture of voltage-controlled oscillator (VCO) was required to solve the…
a major dominant factor which affects the performance of the ADC. To avoid this, the new architecture of voltage-controlled oscillator (VCO) was required to solve the…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A performance of radio frequency and signal strength of LoRa with BME280 sensor
LoRa is a Radio Frequency module that can send packet data up to 3 km in FSPL.LoRa has 3 different Frequency Radios i.e, 915 MHz, 868 MHz, and 433 MHz. LoRa testing is based on different distances, BME280 provides Barometric Pressure, Temperature,…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A novel wideband circularly-polarized microstrip antenna array based on DGS for wireless power transmission
The requirement for applications operating at a variety of frequencies in a unified wireless device has greatly enhanced in recent years. For this
purpose, multi-functional wireless components are essential. This paper
presents a new design of a…
purpose, multi-functional wireless components are essential. This paper
presents a new design of a…
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
A novel method for digital data encoding-decoding
Cryptography is one of the paramount and most vital data treatment processes, it allows us to be secure in our electronic transactions. The process of cryptography protects our valuable data such as private account numbers and transaction amounts,…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A novel fern-like lines detection using a hybrid of pre-trained convolutional neural network model and Frangi filter
Full ferning is the peak of the formation of a salt crystallization line pattern shaped like a fern tree in a woman’s saliva at the time of ovulation. The main problem in this study is how to detect the shape of the salivary ferning line patterns…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A novel delay dictionary design for compressive sensing-based time varying channel estimation in OFDM systems
Compressive sensing (CS) is a new attractive technique adopted for linear time varying channel estimation. orthogonal frequency division multiplexing (OFDM) was proposed to be used in 4G and 5G which supports high data rate requirements. Different…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A novel cross-coupled microstrip bandpass filter with hairpin-DGS resonators using coupling matrix technique
This paper introduces a new design of a cross-coupled microstrip bandpass filter (MBPF) based on hairpin defected ground structure (DGS) resonators using accurate coupling matrix (CM) technique for microwave communication systems. The article…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A new multi-level key block cypher based on the Blowfish algorithm
Blowfish is a block cypher algorithm used in many applications to enhance security, but it includes several drawbacks. For example, the mix between the key and data is limited. This paper presents a new modification to the Blowfish algorithm to…