Results 11 to 20 of about 1,859,997 (304)
Effective Lock Detectors Based on Costas Loop Output for SBPSK Mobile Communications
IEEE AccessIn this study, we address the problem of lock detection at the output of a Costas loop when robust modulations for bandwidth-constrained military communications are used.
D. Ferramola +4 more
doaj +2 more sources
A Costas loop with Differential Coding
International Journal of Contemporary Research and Review, 2017 When a Costas loop is used for QAM demodulation, the received constellation diagram rotates. Rotation causes degradation of the symbol error rate (SER). In this paper we propose differential coding to eliminate the effects of rotation, with SER of 0.004 at SNR of 0 dB.
Janos Ladvanszky
openaire +2 more sources
A Costas Loop Variant for Large Noise
Journal of Asian Scientific Research, 2018 The Costas loop with decision direction can be used for 4QAM demodulation. In this paper we make the decision directed Costas loop more resistant against noise by application of the folding method, that is, carrier recovery after transforming the constellation diagram so that the constellation points coincide.
Janos Ladvanszky
openaire +2 more sources
Modified Costas Loop for Carrier Phase Tracking in GPS Receivers
Radioengineering, 2023 . The carrier phase received at the receivers of the Global Positioning System (GPS) links is used to detect navigation data and to precisely determine the position, speed and time corresponding to the user's equipment.
Antonio Macilio +3 more
semanticscholar +1 more source
IEEE Access, 2023 In this paper, a new drivers’ warning application through personalized Direct-Sequence Spread Spectrum Code-Division Multiple Access (DSSS-CDMA) transmissions, performed using the FM radio broadcasting infrastructure is presented.
Radu Gabriel Bozomitu, Florin Doru Hutu
doaj +1 more source
Sistem Modulator dan Demodulator BPSK dengan Costas Loop
Techne, 2015 Pada tulisan ini akan dibahas suatu sistem transmisi data berbasis BPSK (Binary Phase Shift Keying) menggunakan Costas Loop pada demodulatornya. Pada prinsipnya Costas Loop adalah bentuk khusus dari PLL yang difungsikan untuk melakukan demodulasi sinyal ...
Budihardja Murtianta
doaj +1 more source
Analysis and performance of coded symbol recovery loop using oversampling
EURASIP Journal on Advances in Signal Processing, 2019 In this work, we propose a closed-loop analog system to detect the source information of a binary data stream coded by a flexible finite automaton. We initially consider the dual sideband suppressed-carrier modulation of a base band binary amplitude ...
Giuseppe Visalli
doaj +1 more source
Perancangan Sistem Modulator Binary Phase Shift Keying
Techne, 2016 Sistem yang dibangun adalah sebuah modul sistem modulator BPSK (Binary Phase Shift Keying). Perangkat yang dibahas adalah modulator BPSK dengan frekuensi 10kHz-48kHz dan untuk transmisi secara nirkabel ditambahkan pemancar FM yang akan mentranslasikan ...
Deddy Susilo +2 more
doaj +1 more source
Demodulation of Three-Phase AC Power Transients in the Presence of Harmonic Distortion
Energies, 2020 Load switches in power systems may cause oscillations in active and reactive power flow. Such oscillations can be damped by synthetic inertia provided by smart inverters providing power from DC sources such as photovoltaic or battery storage. However, AC
Benjamin T. Gwynn, Raymond de Callafon
doaj +1 more source
Noise reduction for digital communications – A modified Costas loop
Infocommunications journal, 2020 An efficient way of noise reduction has been presented: A modified Costas loop called as Masterpiece. The basic version of the Costas loop has been developed for SSB SC demodulation, but the same circuit can be applied for QAM demodulation as well. Noise
Janos Ladvanszky
semanticscholar +1 more source