Multi-Channel Radio-Over-Fiber Communication Systems Through Modulation Instability Phenomenon

Azizpour, Rasul; Zakeri, Hassan; Moradi, Gholamreza; Alibakhshikenari, Mohammad; Falcone, Francisco; Liu, BO; Dendini, Tayeb A.; Park, Imko; Koziel, Slawomir; Limiti, Ernesto

doi:10.1109/jphot.2024.3446314

Cited by 3 publications

References 78 publications

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Double Resonance of Electromagnetically Induced Transparency of Rydberg Atom in Counter-Propagating Configuration

Li,

Ma,

Lei

et al. 2024

Electronics

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The double resonance phenomenon of EIT is studied through the ladder three-level Rydberg system. A probe laser with the wavelength λp=852.35 nm is used to coupling the ground state 6S1/2 to the middle state 6P3/2, and a coupling laser with the wavelength λc=509.08 nm is implemented to couple the state 6P3/2 to the Rydberg state 62D5/2. A special optical scheme is designed, in which the co-propagating and counter-propagating configurations are both used. As a result, the double resonance of electromagnetically induced transparency (EIT) with the Rydberg atom is observed. By comparing the distance between the double peaks, it is found that the double resonance phenomenon comes from the Doppler effect, and the distance between the two resonance peaks in the absorption spectrum is related to the detuning of the resonant lasers.

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Double Resonance of Electromagnetically Induced Transparency of Rydberg Atom in Counter-Propagating Configuration

Li,

Ma,

Lei

et al. 2024

Electronics

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Ultra-Wideband Positioning Technology: Exploring TWR, TDoA, and PDoA Methods for Precise Ranging and Positioning

Li,

Zhang

2024

Ultra-Wideband Technologies - Diverse Techniques and Applications [Working Title]

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Ultra-wideband (UWB) technology, recognized for its broad bandwidth and low-power consumption, delivers precise and reliable solutions for ranging and positioning in diverse environments. This chapter delves into the time of flight (ToF) technique, which measures the travel time of a radio signal between the transmitter and receiver. To improve accuracy despite synchronization issues, different two-way ranging (TWR) methods are discussed. For precise indoor positioning, the chapter examines methods such as the geometric analysis method, time difference of arrival (TDoA), and phase difference of arrival (PDoA). The geometric analysis method uses at least three receivers to determine the position, while TDoA requires synchronized receivers to analyze time differences. PDoA bases positioning on phase differences received by antennas. The discussion includes advanced clock synchronization strategies to enhance TDoA accuracy. These methodologies collectively bolster the effectiveness of UWB positioning systems, making them suitable for applications in industrial automation and emergency response.

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RF Modules and Antennas Design for Indoor Positioning Systems

Sabban

2024

Innovations in Indoor Positioning Systems (IPS)

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The main goal of indoor positioning system (IPS) is to locate people or objects, especially inside the building. Satellite technologies and GPS lack precision and cannot function inside buildings, airports, parking garages, and underground locations. Several techniques and devices are used to provide indoor positioning, such as smartphones, Bluetooth, radio waves, Wi-Fi, light, magnetic fields, acoustic signals, and behavioral analytics, which are all used in IPS systems. IPS can achieve position accuracy up to 2 cm. Radio frequency (RF) IPS components and antennas are described in this chapter. MIC, MMIC, and LTCC technologies may be used to develop IPS RF modules and systems, which are presented in this chapter. Moreover, in the design of RF devices for IPS systems, we can use the features and benefits of these technologies in the design of transmitters and receivers for communication systems. Efficient metamaterials antennas are employed to develop radiating elements for radio frequency IPS systems. Monopulse antennas are used to find position and direction in IPS and radar systems. The monopulse antenna S11 parameter is −9.5 dB with 11% bandwidth. The antenna beam width is around 36°. The computed and measured antenna directivity and gain is 10 dBi. A circular patch antenna with SRRs is developed in this chapter. The antenna bandwidth is around 8% for VSWR, better than 3:1. The antenna beam width is around 82°. The antenna directivity and gain are around 7.6 dBi.

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Multi-Channel Radio-Over-Fiber Communication Systems Through Modulation Instability Phenomenon

Cited by 3 publications

References 78 publications

Double Resonance of Electromagnetically Induced Transparency of Rydberg Atom in Counter-Propagating Configuration

Double Resonance of Electromagnetically Induced Transparency of Rydberg Atom in Counter-Propagating Configuration

Ultra-Wideband Positioning Technology: Exploring TWR, TDoA, and PDoA Methods for Precise Ranging and Positioning

RF Modules and Antennas Design for Indoor Positioning Systems

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