The urgent demand for high-bandwidth wireless services in enhanced mobile broadband networks needs innovative solutions for mobile front-haul systems. The terahertz (THz) band offers a promising candidate for ultrahigh-capacity data transmission. This study investigates the integration of photonics-aided THz signal generation with MIMO and PDM technologies. We proposed a novel, to the best of our knowledge, space-time domain equalization algorithm based on MIMO-complex-valued neural networks (CVNN), which can preserve the signal phase and the relation between the X- and Y-polarization. We experimentally demonstrate the transmission of 60-GBaud PDM-QPSK and 30-GBaud PDM-16QAM signals over a 100-m 2 × 2 wireless MIMO link at 320 GHz with BER below 3.8 × 10 and 1.56 × 10 for QPSK and 16QAM signals, respectively. Compared with the MIMO-Volterra, our MIMO-CVNN has an advantage in terms of calculation complexity and decision accuracy due to its effective handling of phase information and inter-polarization relationships simultaneously.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.512416 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Unifying spatiotemporal and frequential attention for traffic prediction.
Sci Rep
January 2025
College of Computer and Information Engineering, Nanjing Tech University, Nanjing, Jiangsu, China.
Intelligent transportation systems heavily rely on forecasting urban traffic flow, and a variety of approaches have been developed for this purpose. However, most current methods focus on exploring spatial and temporal dependencies in historical traffic data, while often overlooking the inherent spectral characteristics hidden in traffic time series. In this paper, we introduce an approach to analyzing traffic flow in the frequency domain.
View Article and Find Full Text PDFReconceptualizing Disorders of the Self as Disorders of Relationship.
Arch Phys Med Rehabil
January 2025
Objective: To validate a universal neuropsychological model that suggests that disorders of the self are best conceptualized as disintegrated neuropsychological processes (i.e., sensations, mental experiences) that lack a sense of relationship to the unified experience/sense of self.
View Article and Find Full Text PDFTopolectrical space-time circuits.
Nat Commun
January 2025
Key Laboratory of advanced optoelectronic quantum architecture and measurements of Ministry of Education, Beijing Institute of Technology, Beijing, China.
Topolectrical circuits have emerged as a pivotal platform for realizing static topological states that are challenging to construct in other systems, facilitating the design of robust circuit devices. In addition to spatial dimensionality, synergistic engineering of both temporal and spatial degrees in circuit networks holds tremendous potential across diverse technologies, such as wireless communications, non-reciprocal electronics and dynamic signal controls with exotic space-time topology. However, the realization of space-time modulated circuit networks is still lacking due to the necessity for flexible modulation of node connections in both spatial and temporal domains.
View Article and Find Full Text PDFAn acoustic metamaterial with space-time modulated densitya).
J Acoust Soc Am
December 2024
Department of Mechanical Engineering, Rowan University, Glassboro, New Jersey 08028, USA.
Space-time modulation opens the door for unprecedented wave behavior control, such as nonreciprocal wave manipulation. Here is proposed a one-dimensional space-time modulated membrane system aiming to realize a kind of acoustic metamaterial with space-time modulated effective density. Three different approaches, namely, the effective medium method, transfer matrix method, and time-domain simulation, are applied to analyze the acoustic response of the system under a monochromatic incidence.
View Article and Find Full Text PDFQuantum Valley Hall Effect without Berry Curvature.
Phys Rev Lett
November 2024
Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea; Center for Theoretical Physics (CTP), Seoul National University, Seoul 08826, Korea; and Institute of Applied Physics, Seoul National University, Seoul 08826, Korea.
The quantum valley Hall effect (QVHE) is characterized by the valley Chern number (VCN) in a way that one-dimensional (1D) chiral metallic states are guaranteed to appear at the domain walls (DW) between two domains with opposite VCN for a given valley. Although in the case of QVHE, the total Berry curvature (BC) of the system is zero, the BC distributed locally around each valley makes the VCN well defined as long as intervalley scattering is negligible. Here, we propose a new type of valley-dependent topological phenomenon that occurs when the BC is strictly zero at each momentum.
View Article and Find Full Text PDFWant 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!