Ambient backscatter communication (AmBC) and non-orthogonal multiple access (NOMA) are two promising technologies for the future wireless networks owing to their high energy spectral efficiencies. The AmBC-aided NOMA symbiotic radio is a technology because of possessing advantages AmBC NOMA. Nonetheless, when number devices with limited power computation capability AmBC-based networks, security becomes critical issue. In this paper, we investigate physical-layer authentication (PLA) identify...

Index modulation multiple access (IMMA) is a promising sixth-generation (6G) technique to prominently improve the spectral efficiency, energy system performance, and support massive connectivity, which considered as new extension of conventional non-orthogonal (NOMA). In this article, we first introduce basic principle IMMA, then investigate potential applications IMMA vehicular networks, reconfigurable intelligent surface (RIS) aided cooperative secure demonstrate flexibility practicability...

This paper incorporates the concept of generalized pre-coded quadrature spatial modulation (GPQSM) into non-orthogonal multiple access (NOMA) systems aided by simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) to boost spectral efficiency. The proposed GPQSM-STAR-RIS-NOMA scheme allows for conveyance additional information bits different users according a pre-coding adapting subsurface allocation patterns. Furthermore, we derive an approximate expression...

With the development of smart grid, demand-side resources (DSR) will play an increasingly important role in power balance supply and demand. In addition, requirement a low-carbon grid means some policy backgrounds, such as carbon emissions trading (CET), should not be ignored. Under these circumstances, it is good idea to construct novel unit commitment (UC) model. This paper proposes model that only takes advantage various on demand side, electric vehicles, response, distributed generation,...

By incorporating the merits of satellite, aerial, and terrestrial communications, space-air-ground integrated network (SAGIN) emerges in recent years as a promising solution to support seamless, high-rate, reliable transmission with an extremely larger coverage than classic network. In essence, SAGIN is cooperative relay network, which high-altitude platforms (HAPs) base stations (BSs) serve intermediates relaying signals between end device satellite. this article, we thereby view from...

In this paper, we propose a novel scheme termed layered orthogonal frequency division multiplexing with index modulation (L-OFDM-IM) to increase the spectral efficiency (SE) of OFDM-IM systems. L-OFDM-IM, all subcarriers are first divided into multiple layers, each determining active and their modulated symbols. The (IM) bits carried on indices which overlapped distinguishable different signal constellations so that number IM is larger than in traditional OFDM-IM. A low-complexity detection...

Wireless traffic prediction is essential for cellular networks to realize intelligent network operations, such as load-aware resource management and predictive control. Existing approaches usually adopt centralized training architectures require the transferring of huge amounts data, which may raise delay privacy concerns certain scenarios. In this work, we propose a novel wireless framework named \textit{Dual Attention-Based Federated Learning} (FedDA), by high-quality model trained...

Quadrature spatial modulation (QSM) is recently proposed to increase the spectral efficiency (SE) of SM, which extends transmitted symbols into in-phase and quadrature domains. In this paper, we propose a generalized QSM (GQSM) scheme further SE by activating more than one transmit antenna in or domain. A low-complexity detection for GQSM provided mitigate burden optimal maximum-likelihood (ML) method. An upper bounded bit error rate analyzed discover system performance GQSM. Moreover,...

In this paper, we propose and study an energy-efficient trajectory optimization scheme for unmanned aerial vehicle (UAV) assisted Internet of Things (IoT) networks. such networks, a single UAV is powered by both solar energy charging stations (CSs), resulting in sustainable communication services, while avoiding outage. particular, optimize the design jointly considering average data rate, total consumption, fairness coverage IoT terminals. A dynamic spatial-temporal configuration operated...

As 5G networks are being rolled out in many different countries nowadays, the time has come to investigate how upgrade and expand them toward 6G, where latter is expected realize interconnection of everything as well development a ubiquitous intelligent mobile world for life. To enable this epic leap communications, article provides an overview outlook on application sparse code multiple access (SCMA) 6G wireless communication systems, which emerging disruptive non-orthogonal (NOMA) scheme...

In this paper, we propose a composite multiple-mode orthogonal frequency division multiplexing with index modulation (C-MM-OFDM-IM) scheme to increase the spectral efficiency (SE) of OFDM-IM systems by extending indexing energy and constellation domains. C-MM-OFDM-IM, information bits are mapped not only subcarrier activation patterns (SAPs) symbols, but also allocation (EAPs) (CAPs). To cope practical situations, variant IM named C-MM-OFDM-IM-II build new mapping rule between increased...

The upcoming sixth generation (6G) driven Internetof- Things (IoT) will face the great challenges of extremely low power demand, high transmission reliability and massive connectivities. To meet these requirements, we propose a novel hybrid ambient backscatter communication (ABCom) or relay (RCom) assisted non-orthogonal multiple access (NOMA) network, which simultaneously enables traditional networks ABCom-assisted IoT networks. Specifically, investigate finite signal-to-noise ratio (SNR)...

Typically, image super-resolution (SR) methods are applied to the standard RGB (sRGB) images produced by signal processing (ISP) pipeline of digital cameras. However, due error accumulation, low bit depth and nonlinearity with scene radiance in sRGB images, performing SR on them is sub-optimal. To address this issue, a RAW method called pyramid restoration network (PRNet) proposed paper. Firstly, PRNet takes low-resolution (LR) as input, generates rough estimation result linear color space....

In this paper, we propose an adaptive orthogonal frequency-division multiplexing with index modulation (OFDM-IM) for two-hop relay networks. contrast to the traditional OFDM-IM a deterministic and fixed mapping scheme, in proposed OFDM-IM, schemes between bit stream indices of active subcarriers first second hops are adaptively selected by certain criterion. As result, same can be varied order combat slow frequency-selective fading. way, system reliability enhanced. addition, considering...

Index modulation multiple access (IM-MA) is recently proposed to exploit the IM concept uplink system, where users transmit their own signals via selected time slots. However, computational complexity of optimal maximum-likelihood (ML) detection in IM-MA tremendously high when number or slots large. In this letter, we propose a low-complexity method for IM-MA, which inspired by log likelihood ratio (LLR) algorithm. addition, because heavy search burden all LLR values, further suboptimal...

Publishing datasets plays an essential role in open data research and promoting transparency of government agencies. However, such publication might reveal users' private information. One the most sensitive sources is spatiotemporal trajectory datasets. Unfortunately, merely removing unique identifiers cannot preserve privacy users. Adversaries may know parts trajectories or be able to link published dataset other for purpose user identification. Therefore, it crucial apply preserving...

Recent years have seen rising needs for location-based services in our everyday life. Aside from the many advantages provided by these services, they caused serious concerns regarding location privacy of users. Adversaries can monitor queried locations users to infer sensitive information, such as home addresses and shopping habits. To address this issue, dummy-based algorithms been developed increase anonymity users, thus, protecting their privacy. Unfortunately, existing only assume a...

Millimeter wave (mmWave) has been claimed to be the only viable solution for high-bandwidth vehicular communications. However, frequent channel estimation and beamforming required provide a satisfactory quality of service limits mmWave In this paper, we propose novel beam tracking framework communications in network setting. For estimation, an algorithm termed robust adaptive multi-feedback (RAF) that achieves comparable performance as existing algorithms, with significantly smaller number...

Recently, decentralization has been extensively explored by researchers. Blockchain, as a representation of decentralized technology, attracted attention with its unique characteristics, such irrevocability and security. Consequently, herein, we introduce cutting-edge blockchain technologies from four directions: system, consensus algorithms, smart contract, scalability. Subsequently, analyze the current lack mechanism, fault tolerance, block capacity blockchain, integration into 5G/6G...

The fifth generation (5G) and beyond networks promote new business opportunities not only for mobile network operators but also industrial verticals. However, most currently deployed 5G are public developed generalized purposes, limiting their adoption various fields demanding specialized quality of service. trend in applying to requires a design paradigm shift calling customized structure, resources, management. In private (C5GBPN), structure can be designed standalone or integrated;...

Intelligent Transportation Systems (ITS) play an increasingly significant role in our life, where safe and effective vehicular networks supported by sixth-generation (6G) communication technologies are the essence of ITS. Vehicle-to-vehicle (V2V) vehicle-to-infrastructure (V2I) communications need to be studied implement ITS a secure, robust, efficient manner, allowing massive connectivity networks. Besides, with rapid growth different types autonomous vehicles, it becomes challenging...

Communication and sensing are two important features of connected autonomous vehicles (CAVs). In traditional vehicle-mounted devices, communication modules exist but in an isolated way, resulting a waste hardware resources wireless spectrum. this paper, to cope with the above inefficiency, we propose vehicular behavior-aware integrated (VBA-ISAC) beamforming design for transmitter multiple antennas. work, beams steered based on behaviors assist driving meanwhile provide spectral-efficient...