Mathematical optimization is now widely regarded as an indispensable modeling and solution tool for the design of wireless communications systems. While has played a significant role in revolutionary progress communication networking technologies from 1G to 5G onto future 6G, innovations have also substantially transformed nature underlying mathematical problems upon which system designs are based sparked development methodologies understand, analyze, solve those problems. In this paper, we...

In this paper, we consider the one-bit precoding problem for multiuser downlink massive multiple-input multiple-output (MIMO) system with phase shift keying (PSK) modulation. We focus on celebrated constructive interference (CI)-based formulation. first establish NP-hardness of (even in single-user case), which reveals intrinsic difficulty globally solving problem. Then, propose a novel negative ℓ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Both dual-functional radar-communication (DFRC) and massive multiple-input multiple-output (MIMO) have been recognized as enabling technologies for 6G wireless networks. This paper considers the advanced waveform design hardware-efficient MIMO DFRC systems. Specifically, transmit is imposed with quantized constant-envelope (QCE) constraint, which facilitates employment of low-resolution digital-to-analog converters (DACs) power-efficient amplifiers. The problem formulated minimization mean...

Abstract Single‐fiber imaging technology offers unique insights for research and inspection in difficult‐to‐reach narrow spaces. In particular, ultra‐compact multimode fiber (MMF) imaging, has received increasing interest over the past decade. However, MMF will be seriously distorted when subjected to dynamic perturbations due time‐varying mode coupling, of space objects via Gaussian beam relatively degraded at edge insufficient contrast. Here, a robust super‐resolution image transmission...

Abstract A high-throughput investigation of metallic glass formation via solid-state reaction was reported in this paper. Combinatorial multilayered thin-film chips covering the entire Ti–Ni–Cu ternary system were prepared using ion beam sputtering technique. Microbeam synchrotron X-ray diffraction (XRD) and fluorescence (XRF) measurements conducted, with 1,325 data points collected from each chip, to map out composition phase constitution before after annealing at 373 K for 110 hours. The...

Quantized constant envelope (QCE) transmission is a popular and effective technique to reduce the hardware cost improve power efficiency of 5G beyond systems equipped with large antenna arrays. It has been widely observed that number quantization levels substantial impact on system performance. This paper aims quantify Specifically, we consider downlink single-user multiple-input-single-output (MISO) <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Quantized constant envelope (QCE) precoding, a new transmission scheme that only discrete QCE transmit signals are allowed at each antenna, has gained growing research interests due to its ability of reducing the hardware cost and energy consumption massive multiple-input multiple-output (MIMO) systems. However, nature greatly complicates precoding design. In this paper, we consider problem for MIMO system with phase shift keying (PSK) modulation develop an efficient approach solving...

A promising approach to deal with the high hardware cost and energy consumption of massive MIMO transmitters is use low-resolution digital-to-analog converters (DACs) at each antenna element. This leads a transmission scheme where transmitted signals are restricted finite set voltage levels. paper concerned analysis optimization low-cost quantized precoding strategy, referred as linear-quantized precoding, for downlink system under Rayleigh fading. In first processed by linear matrix...

This paper considers the one-bit precoding problem for multiuser downlink massive multiple-input multiple-output (MIMO) system with phase shift keying (PSK) modulation and focuses on celebrated constructive interference (CI)-based formulation. The existence of discrete constraint makes generally hard to solve. In this paper, we propose an efficient negative ℓ <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</inf> penalty approach finding a...

Recently, flexible transparent conductive films have received widespread attention as important components in the field of organic electronics. Herein, we propose a method for directly constructing on curved surfaces using silver nanowires primary material with assistance ethyl cellulose. The uniform film is produced by spray coating surface curvature diameter 5 cm. average sheet resistance approximately 18.9 Ω sq–1 transparency reaching 92.33%, and standard deviation 1.1 sq–1. inclusion...

Abstract This paper introduces a basic remote wireless sensor node solar power fire detection system model. It aims at the design and analysis of closed-loop converter circuit aimed voltage regulation within range 2V to 5V. The employs microcontroller for purpose maintaining stable output 9V. Efficiency testing has been conducted quantify input voltages as well currents, yielding efficiency curves across various load resistor values, all surpassing 70% threshold. tailored optimizing battery...

Intelligent reflecting surface (IRS) is an emerging technology to enhance spatial multiplexing in wireless networks.This letter considers the discrete passive beamforming design for IRS order maximize minimum signal-to-interferenceplus-noise ratio (SINR) among multiple users IRS-assisted downlink network.The main difficulty lies phase-shift constraint.Differing from most existing works, this advocates a convex-hull relaxation of constraints which leads continuous reformulated problem...

Reconfigurable intelligent surfaces (RISs) are envisioned as a promising technology for future wireless communication systems due to their ability control the propagation environment in hardware- and energy-efficient way. Recently, concept of RISs has been extended beyond diagonal (BD-RISs), which unlock full potential thanks presence tunable interconnections between RIS elements. While various algorithms have proposed specific BD-RIS architectures, universal optimization framework...

Different neural network architectures can be unsupervisedly or supervisedly trained to represent quantum states. We explore and compare different strategies for the supervised training of feed forward empirically comparatively evaluate performance states in phases matter variants architecture, hyper-parameters, two loss functions, which we refer as \emph{mean-squared error} \emph{overlap}, respectively. consider next-nearest neighbor Ising model diversity its focus on paramagnetic,...

Single fiber imaging technology offers unique insights for research and inspection in difficult to reach narrow spaces. In particular, ultra-compact multimode (MMF) imaging, has received increasing interest over the past decade. However, MMF will be seriously distorted when subjected dynamic perturbations due time-varying mode coupling, of space objects via Gaussian beam relatively degraded at edge insufficient contrast. Here, a robust super-resolution method based on ring core (RCF) with...