Results 51 to 60 of about 40,584 (234)
Active and passive sensors for diagnostics quasi-zenith ionospheric HF communication channels
Физика волновых процессов и радиотехнические системыBackground. There is a growing need for active sensory diagnostics of partial HF channels to provide frequency support to quasi-zenith HF radio links in varying signal propagation conditions.
Dmitry V. Ivanov +3 more
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Jurnal IUS, 2019 Tujuan dari penelitian ini adalah untuk mengetahui, memahami dan menganalisis peranan Badan Penyelesaian Sengketa Konsumen dalam melakukan pengawasan terhadap pencantuman klausula baku oleh pelaku usaha dalam praktik hukum perlindungan konsumen dan untuk
Deviana Yuanitasari, Hazar Kusmayanti
doaj +1 more source
SN Applied Sciences, 2023 The main aim of this review is to describe in detail an advanced technique to detect and estimate the prior unknown parameters of intra-pulse modulated signals and the verification with typical radar signals.
Van Minh Duong +4 more
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Sensors, 2022 In this paper, a new method for detecting and estimating the parameters of a binary phase shift keying (BPSK) signal, based on a cross-correlation function, is proposed. The proposed method consists of two stages.
Van Minh Duong +4 more
doaj +1 more source
Performance Analysis of the LDPC‐Coded Hybrid LQAM‐MPPM for UWOC Systems
IET Optoelectronics, Volume 20, Issue 1, January/December 2026.The effectiveness of LDPC codes in improving the performance of hybrid modulations is discussed, with coded 128‐QAM‐(12, 2) MPPM offering ~6.5 and 5.8 dB code gains at a BER of in strong and moderate turbulence, respectively. These results demonstrate the promise of hybrid modulation with LDPC as a robust and efficient modulation scheme for UWOC ...
Hongyan Jiang +6 more
wiley +1 more source
All-Optical Regeneration and Format Conversion for 4APSK Signals Based on Nonlinear Effects in HNLF
IEEE Photonics Journal, 2023 An all-optical format conversion and regeneration scheme about 4-ary amplitude and phase shift keying (4APSK) signals is proposed and numerically simulated based on nonlinear effects in the high nonlinear fiber (HNLF).
Qiankun Li +5 more
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Analysis of non ambiguous BOC signal acquisition performance Acquisition [PDF]
, 2004 The Binary Offset Carrier planned for future GNSS signal, including several GALILEO Signals as well as GPS M-code, presents a high degree of spectral separation from conventional signals.
Calmettes, Vincent +3 more
core
On Approaching the Ultimate Limits of Photon-Efficient and Bandwidth-Efficient Optical Communication
, 2011 It is well known that ideal free-space optical communication at the quantum limit can have unbounded photon information efficiency (PIE), measured in bits per photon.
Birnbaum, Kevin M. +3 more
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Chaos-based wireless communication resisting multipath effects [PDF]
, 2017 This work is supported by NSFC (China) under Grants No. 61401354, No. 61172070, and No. 61502385; by the Innovative Research Team of Shaanxi Province under Grant No.
Grebogi, Celso +3 more
core +2 more sources
Loop Matching Pursuit Multistation TDOA Estimation Method Based on Noncircular Signal
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.The existing TDOA estimation methods based on orthogonal matching pursuit only consider the scenario of circular signal and are prone to the degradation of estimation performance due to atom misselection under small samples and low signal‐to‐noise ratio.
Zeyu Wang +3 more
wiley +1 more source