This paper studies the massive MIMO full-duplex relaying (MM-FDR), where multiple source-destination pairs communicate simultaneously with help of a common relay equipped very large antenna arrays. Different from traditional MM-FDR protocol, general model sources/destinations are allowed to equip antennas is considered. In contrast conventional system, must be built low-cost components which prone hardware impairments. this paper, effect impairments taken into consideration, and modeled...

In this paper, we consider the hybrid time switching (TS) and power splitting (PS) simultaneous wireless information transfer (SWIPT) protocol design in a full-duplex (FD) massive MIMO system. system, an FD base station (BS) serves set of half-duplex (HD) users fixed HD sensors. The whole can be divided into two phases based on idea TS. first phase is Training Phase, which designed for uplink training sensors energy harvesting as well downlink training. Specifically, transmit pilots...

The substantial growth in mobile Internet and of Things traffic has made system capacity enhancement the most important requirement for next-generation communication systems. Massive multiple-input, multiple-output (mMIMO) is a key technology fulfilling requirements because its strong potential to boost spectral efficiency (SE). However, uplink downlink mMIMO usually operate time-division duplex (TDD) or frequency-division (FDD), which results an insufficient utilization time-frequency resources.

Co-time co-frequency uplink and downlink (CCUD) transmission was considered challenging in the cellular system due to strong self-interference (SI) between transmitter receiver of base station (BS). In this paper, by investigating beam-domain representation channels based on basis expansion model, we propose a full-duplex (BDFD) massive multiple-input multiple-output (MIMO) scheme make CCUD possible. The key idea BDFD lies intelligently scheduling user equipment (UE) distributions their...

Low Earth orbit (LEO) satellite is one of the most promising infrastructures for realizing next-generation global wireless networks with enhanced data rates. Applying massive multiple-input multiple-output (mMIMO) to LEO communication systems a novel idea enhance capacity and realize high-speed interconnection. However, obtaining effective instantaneous channel state information (iCSI) challenging due time-varying propagation environment long transmission delay. In this letter, deep learning...

Wireless communication for high-speed railways (HSRs) has received considerable attention in recent years. The fast time-varying and doubly selective fading properties of channels pose a substantial threat to the link performance. Meanwhile, nonnegligible Doppler frequency offset (DFO) resulting from motion induces intercarrier interference. In this paper, we propose an angle-domain channel tracking hybrid beamforming scheme HSR by investigating time spatial channels. A large-scale uniform...

In this paper, we investigate the interactions between a base station (BS) and full-duplex (FD) active eavesdropper in uplink of multi-cell massive multiple-input multiple-output (MIMO) systems. Focusing on resistance against simultaneous eavesdropping jamming, introduce beam extraction method based spatial information to eliminate pilot contamination, from which beam-domain (BD) distributed receiving scheme is proposed suppress jamming mixed users' signals. From practical point view, use...

In this paper, beam-domain (BD) anti-jamming transmission in a downlink massive multiple-input multiple-output (MIMO) system is investigated. A smart jammer with multiple antennas attempts to interfere the signal reception of users desired energy efficiency (EE), whereas base station (BS) tries minimize cost while ensuring uninterrupted communication. Bayesian Stackelberg game between BS and jammer, where follower acts as leader, modeled. subgame, optimal jamming precoding closed-form power...

Cell-free massive multiple-input multiple-output (mMIMO) is regarded as a promising technology in the future wireless communication. This paper aims to minimize downlink power consumption of cell-free mMIMO system under rate constraints users and per-antenna over spatially correlated Rayleigh fading channels. Firstly, this studies performance two different transmission modes: non-coherent joint coherent transmission. Then, for modes, corresponding optimization model established an efficient...

In this paper, we mainly study how to improve the secure transmission performance of cell-free massive multiple-input multiple-output (MIMO) systems by using location technology. MIMO systems, active pilot attacks will contaminate uplink channel estimation and affect downlink precoding access points (APs). order effectively reduce impact on user transmission, paper respectively proposes an method based fingerprint positioning a algorithm information. Firstly, under imperfect state...

In this paper, we design the simultaneous wireless information and power transfer (SWIPT) protocol for massive multi-input multi-output (mMIMO) system in beam-domain (BD). system, base station (BS) serves a set of fixed uplink half-duplex legitimate terminals with nonlinear energy harvester. Meanwhile, non-cooperative harvesting (EH) terminal, which is not pay transmission or untrusted, also within coverage BS. Considering nonlinearity practical EH circuits, adopt realistic model rather than...

The intelligent reflecting surface (IRS) is considered a core technology of next-generation mobile communication. It has significant advantages in enhancing network coverage, spectrum efficiency, energy and deployment cost. Compared with the conventional massive multiple-input-multiple-output (MIMO) system, cell-free MIMO overcomes limitation imposed by inter-cell interference traditional cellular networks realizes coherent transmission centered on users. In this article, we consider new...

This paper investigates a multi-pair two-way massive MIMO amplify-and-forward full-duplex relay (FDR) system over Ricean fading channels, where multiple pairs of users exchange information within pair through with very large number antennas (M for transmission and M reception). First, the zero-forcing reception/zero-forcing maximum-ratio combining/maximum-ratio processing matrices imperfect channel state at are presented. Then, corresponding asymptotic expressions (in M) end-to-end...

In this letter, fingerprinting-based cooperative localization for millimeter-wave (mmWave) cell-free massive multiple-input multiple-output (MIMO) systems is investigated. For the purpose of robust in line-of-sight (LOS) or non-LOS (NLOS) environments, a dynamic two-dimensional (2D) fingerprint training scheme employing maximum likelihood (ML) estimation and information entropy theory proposed. This regularly extracts link state matrix confidence factor-aided AOA vectors from uplink...

This letter investigates user-centric (UC) access point (AP) selection for sum spectral efficiency (SE) maximization in cell-free massive multiple-input multiple-output (MIMO) systems under dynamic user demand environment. The AP problem can be modeled as a stochastic game with local altruistic characteristics. It proved to an exact potential (EPG), which further clarifies the existence of pure strategy Nash equilibrium (NE). Then, we propose learning-based distributed UC algorithm (DUAPSA)...

This paper proposes an amplify-and-forward-based massive multiple-input-multiple-output full-duplex relaying (AF-MM-FDR) protocol, where multiple source-destination pairs communicate simultaneously with a common relay. A zero-forcing (ZF)-based relay transceiver design semiblind gain control is presented, considering the problem of oscillation. The asymptotic expression end-to-end signal-to-interference-plus-noise power (SINR) derived under general scaling scheme. behaviors echo interference...

This paper investigates the 3-D massive multiple-input multiple-output (MIMO) for air-to-ground transmission, where an air platform (AP) is equipped with a 2-D rectangular antenna array and communicates number of user equipments (UEs) on ground. By exploiting slow timevarying parameters, such as channel correlation angles departure (AoDs) UEs, we first propose location-assisted two-layer precoding scheme downlink transmission. The first-layer aims to decompose original MIMO system into...

The quasi-static assumption of channels becomes invalid in a number emerging applications massive multiple-input multiple-output (MIMO) systems with high base station (BS)/user mobility, such as speed train and unmanned aerial vehicle communications. In these situations, the time variation shortens channel coherence decreases efficiency traditional estimation schemes significantly. This paper focuses on time-varying problem MIMO systems, where mobility BS/user is assumed to be high. sparse...

In this letter, we investigate user-centric access point (AP) selection for cell-free massive multiple-input multiple-output (MIMO) systems. contrast to existing works, study problem from the perspective of game theory and model AP service cluster formation as a local altruistic game, which is proven be an exact potential (EPG) have at least one pure Nash equilibrium (NE). Then, improved maximum non-neighbor-set-based concurrent spatial adaptive play (MNSB-C-SAP) algorithm proposed achieve...

Unmanned aerial vehicle (UAV) assisted air-to-ground (A2G) communication is vulnerable to malicious jamming due the broadcast nature of wireless communications. In this letter, an anti-jamming power control framework with unknown model and transmission proposed. particular, probability density function (PDF) effective signal strength (EJSS) first estimated via kernel estimation (KDE). Then, utilizing EJSS, a deep deterministic policy gradient (DDPG) based proposed acquire strategy in real...

The average symbol-error-rate (SER) performances for the three-phase two-way relaying (TWR) protocols are analyzed and compared in Rayleigh fading channels, where terminals relay interfered with by a finite number of cochannel interferers. is assumed to operate decode-and-forward (DF) mode. Three TWR adopt different combining methods on received signals from link direct considered, tight approximate expressions SERs these theoretically derived. Based analytic results, SER three...

In this article, an intelligent reflecting surface (IRS)-assisted integrated satellite-unmanned aerial vehicle (UAV)-terrestrial (SUT) Internet of Things (IoT) network faced with a smart jammer under imperfect channel state information (CSI) conditions is considered. We propose Stackelberg game model to describe the adversarial relationship between satellite, UAV, and IRS jammer, which are modeled as leader follower, respectively. For follower subgame, aims minimize jamming power while...

Opportunistic relay selection (RS) is an efficient method to obtain diversity gain in analogue network coding (ANC) protocol with multiple relays. However, networks mobile relays, the channel state information (CSI) used RS procedure becomes outdated because of time‐varying nature fading channels, which severely deteriorates system performance. In this study, authors study strategy aims optimise outage performance ANC schemes for two different cases are designed, that is, (i) scheme only CSI...

In this paper, we investigate the outage performance of time division broadcasting (TDBC) protocol in independent but non-identical Rayleigh flat-fading channels, where all nodes are interfered by a finite number co-channel interferers. We assume that relay operates amplified-and-forward mode. A tight lower bound as well asymptotic expression probability is obtained closed-form. Through both theoretic analyses and simulation results, show achievable diversity TDBC zero interference-limited...