A novel scheme for the generation and stabilization of the millimeter-wave (mmW) signal employing a frequency-demultiplication optoelectronic oscillator (FD-OEO) has been theoretically analyzed and experimentally demonstrated. The FD-OEO can keep sustaining without optical first-order sidebands, which would help to simplify the photonic-assisted frequency multiplication process and provide a wide frequency compensation range for the mmW system simultaneously. The stability of the generated 40-GHz mmW signal reaches 1.38 × 10 at the average time of 100s. Besides, the measured single-sideband phase noise of the generated mmW signal exhibits as low as -103 dBc/Hz at 10-kHz offset frequency, maintaining a spurious level of -97 dBc.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.26.027358 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Eyelid Dynamics Characterization with 120 GHz mmW Radar.
Sensors (Basel)
November 2024
CommSensLab, Department of Signal Theory and Communications, Universitat Politècnica de Catalunya (UPC), Campus Nord, Carrer de Jordi Girona, 1-3, 08034 Barcelona, Spain.
This paper presents a new approach to measuring eyelid movement using millimeter wave (mmW) radar technology. A two-step method is proposed, involving the observation of a small resolution cell corresponding to the monitored eye and the evaluation of the phase evolution over the measurement period. Simulations are conducted to support radar system optimization and data interpretation with a focus on detecting eyelid movement patterns and compensating for interference from other parts of the body.
View Article and Find Full Text PDFIn this Letter, an integrated deceptive sensing and secure communication scheme based on random subcarrier (RSC) orthogonal frequency-division multiplexing (OFDM) in a photonics-assisted millimeter-wave (MMW) system is proposed. Based on chaotic encryption on bit and constellation level, the RSC-OFDM signal is used to further disturb the transmitting signal and achieve sensing deception. Moreover, to make full use of sensing function to achieve collaborative security, sensing-aided dynamic parameter (DP) encryption is designed, which uses sensing information as the random seed to get encryption DPs and sequences.
View Article and Find Full Text PDFAdiponectin-induced activation of ERK1/2 drives fibrosis in retinal pigment epithelial cells.
Hum Cell
October 2024
Department of Biochemistry and Molecular Biology, Pondicherry University, Puducherry, India.
Adiponectin (APN), a vasoactive cytokine produced by adipocytes, has emerged as a critical player in retinal diseases. Renowned for its antioxidant, anti-angiogenic, and anti-inflammatory properties, APN levels are closely linked to metabolic disorders, such as insulin resistance, obesity, and diabetic retinopathy (DR). Our previous work demonstrated that APN is similar in efficiency as Avastin in limiting neovascularization in retinal endothelial cells.
View Article and Find Full Text PDFTwo-way 5G NR FSO-HCF-UWOC converged systems with R/G/B 3-wavelength and SLM-based beam-tracking scheme.
Sci Rep
September 2024
Institute of Electro-Optical Engineering, National Taipei University of Technology, Taipei, 10608, Taiwan.
Article Synopsis
- A groundbreaking two-way fifth-generation (5G) system combining free-space optical (FSO), hollow-core fiber (HCF), and underwater wireless optical communication (UWOC) has been successfully developed, showcasing high-speed and long-distance data transfer.
- This system utilizes red/green/blue (R/G/B) wavelengths and a spatial light modulator (SLM) for improved transmission rates, as well as to counteract misalignments caused by movement in drones or ocean currents.
- Tests over a 1-km FSO, 10-m HCF, and 10.44-m underwater environment achieved impressive data rates of 9.1 Gb/s upstream and 24 GHz downstream with low error rates, indicating significant
[Not Available].
MMW Fortschr Med
October 2024
Springer Medizin Verlag GmbH, Aschauer Str. 30, 81549, München, Deutschland.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!