The performance of active disturbance rejection control (ADRC) algorithms can be limited in practice by high-frequency measurement noise. In this article, problem is addressed transforming the high-gain extended state observer (ESO), which inherent element ADRC, into a new cascade structure. Set experiments, performed on dc–dc buck power converter system, show that ESO design, compared to conventional approach, effectively suppresses detrimental effect sensor noise overamplification while...

Connectivity restoration plays an important role in maintaining the long-term operation wireless sensor networks (WSNs), especially, environment-harsh cases. However, current solutions lack ability to handle second damages and capacity of designing requirement-different connectivity approaches according different needs. In this article, we propose a durability-based establishment (DBCE) scheme for disjoint segments WSNs. This includes three regarding segment evaluation or selection: 1) shape...

The finite-state Markov channel (FSMC), where the transition probability is controlled by a state undergoing process, useful model for mobile wireless communication channel. In this paper, we investigate security issue in systems considering FSMC with an eavesdropper, which call wiretap (FSM-WC). We assume that perfectly known legitimate receiver and through noiseless feedback channel, sends his received output back to transmitter after some time delay. Inner outer bounds on...

Mobile-edge nodes, as an efficient approach to the performance improvement of wireless sensor networks (WSNs), play important role in edge computing. However, existing works only focus on connected and suffer from high calculational costs. In this article, we propose a rendezvous selection strategy for data collection disjoint WSNs with mobile-edge nodes. The goal is achieve full network connectivity minimize path length. From perspective application scenario, article distinctive two...

Ultra-reliable low-latency communication (URLLC) and reconfigurable intelligent surface (RIS) aided are two key technologies in future wireless communications. However, secure URLLC over RIS-adied channels receives little attention the literature. In this paper, we propose finite blocklength (FBL) coding schemes for RIS SISO/SIMO/MIMO systems presence of an eavesdropper (no direct link between transceiver), which based on existing scheme point-to-point white Gaussian channel with noiseless...

The model of wiretap channel (WTC) is important as it constitutes the essence physical layer security. Recently, has been shown that a noiseless feedback from legitimate receiver to transmitter helps increase secrecy capacity WTC. However, present strategy focuses only on generating key signal and using this protect part transmitted message. This secret key-based proved be optimal for some degraded cases. In paper, we propose new WTC, where not used generate but also cooperative information...

We investigate the state-dependent Gaussian wiretap channel with noncausal state information at transmitter (GWTC-N-CSIT), and explore whether three strategies (i.e., taking action on state, legitimate receiver's output feedback, combining former two together) help to enhance secrecy capacity of GWTC-N-CSIT. To be specific, we first determine GWTC-N-CSIT noiseless feedback. Next, derive lower upper bounds action-dependent state. Finally, both show that these meet for a special case....

It has been shown that when federated learning (FL) is implemented in wireless communication systems, the noise of channel directly serves as a privacy-inducing mechanism, which indicates un-coded transmission can achieve privacy "for free" However, due to broadcast nature communication, FL susceptible eavesdropping, and different from requirement (to preserve accuracy data analysis, information leakage allowed mechanisms), physical layer security (PLS) caused by eavesdropper should vanish,...

In this paper, we investigate the state-dependent degraded broadcast channels with confidential messages (SD-DBC-CM), and or without noiseless feedback. new model, channel state is available at transmitter in a noncausal causal manner, there may exist feedback link from nondegraded receiver to transmitter. For discrete memoryless SD-DBC-CM, inner outer bounds on capacity-equivocation regions are provided for both cases. SD-DBC-CM feedback, region case, determined case. The results of paper...

Recently, it has been shown that the time-varying multiple-access channel (MAC) with perfect state information (CSI) at receiver and delayed feedback CSI transmitters can be modeled as finite MAC (FS-MAC) feedback, where time variation of is characterized by statistics underlying process. To study fundamental limit secure transmission over multi-user wireless communication systems, we re-visit FS-MAC considering an external eavesdropper, which call wiretap (FS-MAC-WT) feedback. The main...

In this paper, we investigate the effects of an additional trusted relay node on secrecy multiple-access wiretap channel (MAC-WT) by considering model (MARC-WT). More specifically, first, discrete memoryless MARC-WT. Three inner bounds (with respect to decode-forward (DF), noise-forward (NF) and compress-forward (CF) strategies) capacity region are provided. Second, degraded MARC-WT, present outer bound model. Finally, Gaussian find that NF CF strategies help enhance Tekin-Yener's achievable...

In this paper, we investigate the effects of a trusted relay node on secrecy broadcast channel by considering model with confidential messages (RBC-CM). Inner and outer bounds capacity-equivocation region RBC-CM are provided, capacity results further explained via degraded Gaussian example, which call one common messages. Numerical show that helps to enhance security

In this article, a general framework for enhancing the physical layer security (PLS) in Internet of Things (IoT) systems via channel feedback is established. To be specific, first, we study compound wiretap (WTC) with feedback, which can viewed as an ideal model PLS downlink transmission IoT feedback. A novel strategy proposed and corresponding lower bound on secrecy capacity constructed model. Next, generalize (i.e., WTC feedback) by considering states delay, generalized called finite state...

The wireless hierarchical federated learning (HFL) in the presence of physical layer security (PLS) issue is revisited. Though a framework this problem has been established previous work, practical coding scheme for HFL system remains unknown. In paper, we extend already existing feedback white Gaussian channel to with quasi-static fading duplex channel, and derive achievable rate upper bound on eavesdropper's uncertainty proposed scheme. Finally, results paper are further explained via...

It has been shown that the SK scheme, which was proposed by Schalkwijk and Kailath, is a self-secure capacity-achieving (SSCA) feedback scheme for Gaussian wiretap channel, i.e., not only achieves capacity of but also secure itself secrecy channel. For multi-user channels, very recently, it Ozarow's two-user multiple-access channel (GMAC) SSCA (GMAC-WT). In this paper, first, we propose GMAC-WT with degraded message sets (GMAC-WT-DMS). Next, extend above to GMAC-WT-DMS noncausal state...

A naphthalene group was incorporated into the polymer side chain to help active layer spontaneously form good film morphology.

The relative generalized Hamming weight (RGHW) of a linear code and subcode, two-code extension (GHW), has been applied to the wiretap channel type II. concept also extended in network II for secrecy control coding. In trellis-based decoding algorithms, given subcode provides additional information measure complexity. Bounds on RGHW facilitate design optimal schemes above applications. only known explicit bound was Singleton bound. this paper, we show some important inequalities with respect...

In this paper, we re-visit the relay broadcast channel with confidential messages (RBC-CM) by considering a compress-and-forward (CF) inner bound on capacity-equivocation region of RBC-CM. This CF is further explained via degraded Gaussian example, and show that in some particular cases, strategy performs better than decode-and-forward (DF) noise-and-forward (NF) strategies.

The development of GPU has launched a huge challenge to the current traditional computing architecture. In recent years, CPUs have developed from single-core multi-core make up for shortcomings that are not good at large-scale calculations. How balance computational load multiple become an urgent problem in academic community years. This paper uses BP neural network predict weight smooth weighted round-robin algorithm by extracting characteristics computer system and task graph...