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RF/Millimeter-Wave/Sub-THz Antennas, Integrated Circuits and Systems for 5G and Beyond

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: 20 August 2025 | Viewed by 533

Special Issue Editor


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Guest Editor
School of Electronics and Electrical Engineering, College of Engineering, Dankook University, Yongin-si 16890, Republic of Korea
Interests: CMOS RF/millimeter-wave/THz integrated circuits; antenna and system designs for wireless communications; radar and wireless power transmission

Special Issue Information

Dear Colleagues,

The 5G and 6G wireless communications are extending the area of communication into various systems, such as satellite communications and automotive radar systems. Recently, there has been strong interest in techniques used to extend systems from RF through millimeter-wave to sub-THz. Examples of these include antenna, circuits, and systems for CMOS-, SiGe-, GaAs-, and GaN-based transceivers, phased arrays, reflected impedance surfaces, automotive imaging radars, military/commercial radars and communications, RF wireless power transfer, built-in self-test, and calibration. Advanced systems also include advanced 3D packaging.

In this Special Issue, original research articles and reviews are welcome to be submitted. Research areas may include, but are not limited to, the following:

  1. RF, millimeter-wave, and sub-THz antenna and circuits;
  2. RF, millimeter-wave, and sub-THz front-end circuits, transmitters, receivers, and transceivers;
  3. RF, millimeter-wave, and sub-THz devices, packaging, modeling, and testing technologies;
  4. 5G/6G, satellite, radar, imager, and sensor applications.

I look forward to receiving your contributions.

Sincerely,

Dr. Chul Woo Byeon
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • RF
  • millimeter-wave
  • 5G/6G
  • satellite
  • radar

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Published Papers (1 paper)

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Research

16 pages, 860 KiB  
Article
Adaptive Pre-Distortion Compensation for LED Nonlinear Distortion in VLC-OFDM Systems Using Frequency Symbol Spreading
by Koichi Seimiya, Ren Oshima, Geonuk Kang and Chang-Jun Ahn
Appl. Sci. 2025, 15(8), 4221; https://doi.org/10.3390/app15084221 - 11 Apr 2025
Viewed by 204
Abstract
This paper proposes an adaptive pre-distortion method for mitigating LED nonlinear distortion in Visible Light Communication (VLC)-OFDM systems. The inherent nonlinear characteristics of LEDs disrupt the orthogonality among OFDM subcarriers, causing signal distortion and performance degradation. To overcome this issue while minimizing computational [...] Read more.
This paper proposes an adaptive pre-distortion method for mitigating LED nonlinear distortion in Visible Light Communication (VLC)-OFDM systems. The inherent nonlinear characteristics of LEDs disrupt the orthogonality among OFDM subcarriers, causing signal distortion and performance degradation. To overcome this issue while minimizing computational complexity at the transmitter, we introduce a feedback-based nonlinear parameter estimation approach using the Least Squares Method (LSM) and Median Based Method (MBM). These estimated parameters are then fed back to the transmitter, enabling efficient adaptive pre-distortion based on the inverse function of the estimated nonlinear characteristics. This approach reduces computational costs at the transmitter compared to conventional methods requiring high-performance processing. Additionally, we incorporate Frequency Symbol Spreading (FSS) to further enhance robustness against channel impairments such as Rician fading by equalizing the Signal-to-Noise Ratio (SNR) across subcarriers. Simulation results under various channel conditions, including AWGN, Rician fading, and realistic multi-LED lighting scenarios, demonstrate a significant improvement in Bit Error Rate (BER) performance, validating both the effectiveness and practical advantages of the proposed approach. Full article
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