Intelligent reflecting surface (IRS) is a novel technology to manipulate wireless propagation channels via smart and controllable signal reflection. In this paper, we investigate an IRS-aided integrated terrestrial-satellite network (ITSN) system, where the IRS deployed assist co-existing transmissions of terrestrial small base stations (SBSs) satellite. Because spectrum sharing in ITSN, interference between two systems should be carefully mitigated. Our objective maximize weighted sum rate...

The noncooperative target tracking is an important issue for the Internet of Underwater Things (IoUT). Autonomous underwater vehicles (AUVs) are preferred options to achieve especially in anchor-free environments, where no equipments with known positions, named anchors, deployed. self-organized mobile network multiple AUVs can localize and continuously monitor target. Thus, this article, we investigate problem using environments. In tracking, play as references their positions need be...

Abstract In this paper, we investigate the trajectory tracking control problem for autonomous underwater vehicles (AUVs) with time‐varying external disturbances of currents and waves in sea. To solve problem, a fixed‐time extended state observer (FTESO)‐based controller is proposed. Firstly, by using observer, FTESO proposed estimating velocities AUV within fixed convergence time. Based on FTESO, reducing errors improving robustness performance. Theoretical analysis given, which shows that...

The integrated terrestrial satellite networks (ITSNs) have been deemed as a promising solution to ubiquitous Internet access anytime and anywhere. In this paper, we investigate the spectrum sharing problem in ITSN, particular focusing on downlink transmission of network, which adopts framing structure for users (SUs). We model interference from both uplink transmissions SUs according beamforming techniques. For transmission, assume that (TUs) are served cooperatively by multiple small base...

Jointdetection and communication systems demonstrate their unique efficiencies in both spectrum cost. In this letter, we propose a sonar-communication (SonarCom) system for underwater scenarios based on two multicarrier (MC) waveforms, which are orthogonal frequency division multiplexing (OFDM) chirp (OCDM) waveforms. Different types of waveforms provide flexibilities to deal with various environments. Furthermore, generalized likelihood ratio test (GLRT) is proposed detection multipath...

This paper investigates an intelligent reflecting surface (IRS)-aided integrated terrestrial-satellite network (ITSN) system for the low channel gain users, where IRS is deployed to assist co-existing transmissions of terrestrial small base stations (SBSs) and satellite. Because spectrum sharing in ITSN, interference between two systems should be carefully mitigated. We aim maximizing weighted sum rate (WSR) all users through jointly optimizing frame based coordinated transmit beamforming...

Impulsive noise is considered a type of interference that may significantly affect the performance communication systems and thus cannot be neglected. In this letter, probability density function (PDF) impulsive passing through Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) derived, bit error rate (BER) DFT-S-OFDM under analyzed. Based on PDF noise, we derive an explicit expression BER. addition, approximated BER further derived for computational...

This paper investigates an intelligent reflecting surfaces (IRS) aided anti-jamming communication strategy in the integrated terrestrial-satellite network (ITSN), where IRS is exploited to mitigate jamming interference and enhance system performance. In such a network, terrestrial satellite are co-existing with spectrum-sharing scheme presence of multi-antenna jammer. We aim at maximizing weighted sum rate (WSR) all users by jointly optimizing beamformers phase shifts while considering...

In this paper, we consider the relay selection and power allocation (RSPA) problem in amplify-and-forward (AF) relaying networks. The objective is to minimize outage probability at receiver, assuming that only mean channel gain information available. By taking advantage of its special structure, propose decompose RSPA into two tractable subproblems, which can be implemented a semidistributed manner. For (RS) subproblem, relay-ordering-based scheme designed incrementally select subset relays...

In the conventional dual-hop cooperative communications, relays with imbalanced channel condition to source or destination may become bottleneck of overall cooperation. Therefore, in this paper, a Three-Stage Relaying (TSR) framework is proposed for clustered networks extend cooperation three stages by dividing into two groups. The long-haul communication between groups form virtual multi-input multi-output (MIMO) link which relay and (or destination) can be removed. We focus on power...

For clustered wireless networks, the conventional dual-hop cooperation technique is inefficient since relays with imbalanced channels to source and destination may become bottleneck of overall transmission. In this paper, a novel cooperative framework called three-stage relaying (TSR) scheme proposed address problem. TSR, are divided into two clusters/groups, virtual multiple-input-multiple-output (MIMO) antenna array formed by introducing transmission between relay groups. This...

State estimation, which computes the best possible approximation for system state based on perceived information transmitted from sensors to estimators, is vital control performance in industrial cyber-physical systems (ICPSs) with integrated techniques of control, communication and computing. Thus estimation relies reliability. In order improve reliability, redundant channels/slots are reserved data transmission wireless techniques, such as WirelessHART. However, redundancy scheme burdens...

In the conventional dual-hop cooperative communications, relays with imbalanced channel gain to source and destination cannot be efficiently utilized since one of these two hops can become bottleneck overall transmission. this paper, we propose a cluster-based communication (CBCC) scheme address problem. scheme, are divided into clusters, transmissions consist three stages. way, between relay or potentially broken through relay-to-relay transmissions. We focus on selection problem for...

State estimation, which computes the best possible approximation for system state based on perceived information transmitted from sensors to estimators, is vital control performance in industrial cyber-physical systems (ICPSs) with integrated techniques of control, communication and computing. Thus estimation relies reliability. In order improve reliability, redundant channels/slots are reserved data transmission wireless techniques, such as WirelessHART. However, redundancy scheme burdens...

IEEE 802.11p is a communication protocol which extended by 802.11 standard, mainly used in Vehicular Ad-Hoc Networks (VANETs). VANETs generally include the Service Channel (SCH) and Control (CCH). In traditional protocol, length ratio between CCH SCHs fixed. This paper presents variable SCH interval(VSI) multichannel medium access control (MAC) scheme under non-saturated channel. Under this scheme, we can of interval interval. uses three-dimensional Markov chain model to calculate delay WAVE...

In underwater acoustic sensor networks (UASNs), data collection is a fundamental task. this paper, we propose to employ an autonomous vehicle (AUV) dynamically collect from all the sensors. The problem solved in three steps. We first investigate optimal transmission distance and frequency based on characteristics of channels. Moreover, sensors are clustered according distance, cluster centers set as waypoints. A trajectory design proposed for AUV travel waypoints with minimum time, impact...

This paper investigates a multiple intelligent reflecting surfaces (IRSs) aided integrated terrestrial-satellite network (ITSN), where the IRSs are deployed to cooperatively assist low channel gain users in co-existing transmission system. In such network, coordinated beamforming and frame based scheme considered for terrestrial satellite respectively. We aim at maximizing weighted sum rate (WSR) of all by jointly designing small base stations (SBSs) phase shifts IRSs, subject individual...

In this letter, spectrum sensing for wide-sense stationary signals with temporal correlation is studied. order to perform uniformly most powerful invariant test (UMPIT) or locally (LMPIT), the ratio of distributions maximum statistics derived in closed-form using Wijsman’s theorem. This shows that UMPIT can be obtained when signal-to-noise (SNR) and normalized auto-correlation matrix primary user signal are both known. addition, LMPIT nominal SNR (LMPIT-NSNR) improved sample (LMPIT-ISAC)...