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TELKOMNIKA Telecommunication, Computing, Electronics and Control
A low power wideband varactorless VCO using tunable active inductor
This paper presents a wideband varactorless voltage controlled oscillator (VCO) based on tunable active inductor in 90 nm CMOS process which yields a tuning range of 1.22 GHz to 3.7 GHz having a tuning scope of 100.5%. The designed VCO can be used…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A hybrid soft bit flipping decoder algorithm for effective signal transmission and reception
The Euclidean geometry (EG) based low-density parity check (LDPC) codes are enciphered and deciphered in various modes. These algorithms have the back-and-forth between decoding delay, and power usage, device unpredictability resources, and error…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A hybrid algorithm for wave-front corrections applied to satellite-to-ground laser communication
Laser communications hold accurate data rate for ground satellite links.
The laser beam is transmitted through the atmosphere. The clear-air turbulence induces a number of phase distortions that damage wave-front. Adaptive optics (AO) treats wave…
The laser beam is transmitted through the atmosphere. The clear-air turbulence induces a number of phase distortions that damage wave-front. Adaptive optics (AO) treats wave…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A dynamic S-box generation based on a hybrid method of new chaotic system and DNA computing
S-box is one of the most significant structures used to construct encryption that is strong and resistant to attacks in encryption algorithms. The new 4D-hyper chaotic system and deoxyribonucleic acid (DNA) computing are used in this paper to provide…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A developed GPS trajectories data management system for predicting tourists' POI
One of the areas that have challenges in the use of internet of things (IoT) is the field of tourism and travel. The issue here is how to employ this technology to serve the tourism and managing the produced data. This work is focus on the use of…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A coverless image steganography based on robust image wavelet hashing
Since the concept of coverless information hiding was proposed, it has been greatly developed due to its effectiveness of resisting the steganographic tools. In this paper, a new coverless steganography is presented to hide the secret data in a more…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A compressed sensing approach for antenna array calibration
This paper presented a compressive sensing (CS) calibration technique that simultaneously measures all the element excitations of a 2×2 active phased antenna array (APAA) instantaneously. The power patterns of the rectangular 2×2 APAA element are…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A comparative study of mango fruit pest and disease recognition
Mango is a popular fruit for local consumption and export commodity.
Currently, Indonesian mango export at 37.8 M accounted for 0.115% of
world consumption. Pest and disease are the common enemies of mango that degrade the quality of mango yield.…
Currently, Indonesian mango export at 37.8 M accounted for 0.115% of
world consumption. Pest and disease are the common enemies of mango that degrade the quality of mango yield.…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A compact UWB monopole antenna with penta band notched characteristics
A modified rectangular monopole ultra-wideband (UWB) antenna with
penta notched frequency bands is presented. An inverted U shaped and
slanted U-shaped on the radiating patch are inserted to achieve WiMAX and ARN bands rejection respectively, two…
penta notched frequency bands is presented. An inverted U shaped and
slanted U-shaped on the radiating patch are inserted to achieve WiMAX and ARN bands rejection respectively, two…
TELKOMNIKA Telecommunication, Computing, Electronics and Control
A compact size microstrip five poles hairpin band-pass filter using three-layers structure for Ku-band satellites application
This paper presents a reduced size microstrip five poles hairpin band-pass filter using three-layers structure for Ku-band satellites application.
The three-layers structure shows a substantially reduced filter size and
enlarged bandwidth. The…
The three-layers structure shows a substantially reduced filter size and
enlarged bandwidth. The…