This paper investigates the secrecy outage performance for a large-scale downlink system with full-duplex (FD) non-orthogonal multiple access (NOMA) transmission aided by artificial noise (AN). In system, legitimate users (LUs) are randomly distributed according to homogeneous Poisson point processes whereas passive eavesdropper (Eve) is certainly located. We introduce secure cooperative communication scheme, in which nearby NOMA operating FD mode act as jammers and generate AN enhance...

A planar integrated bandpass filter (BPF) structure that makes use of a quarter-mode substrate waveguide (QMSIW) technique is presented in this work for the first time. The proposed composed cascaded QMSIW cavities, which are magnetically coupled with neighbourhood sections. SIWs overall size largely reduced so it possible to low-profile filters within few GHz. To demonstrate design concept, two C-band four-pole Chebyshev designed different bandwidth applications. Measured results and...

The applications of single-pixel imaging (SPI) and optical multiplexing techniques in encryption are gradually increasing. However, little attention has been given to integrating these two for applications. Here, we propose a dual-layer scheme that combines sample region-dependent SPI structured light holography. In the process, bucket signal obtained by position coordinates used generate illumination patterns will be encrypted into holographic ciphertext through spatial-structured During...

The existing centralized antenna array architecture and the corresponding baseband processing based signal detection algorithms incur huge burden on raw data rates chip input/output bandwidth for massive multiple-input multiple-output (MIMO) systems. In this paper, we propose a novel decentralized under framework of expectation propagation algorithm (EPA) uplink MIMO This partitions base station antennas into multiple independent clusters, each associated with analog digital modulation...

Orthogonal time frequency space (OTFS) modulation has recently received considerable attention due to its capabilities exploit full time-frequency diversity and deal with channel dynamics in high-mobility scenarios. However, the implementation of high-performance receivers delay-Doppler (DD) domain poses serious challenges practice, especially rich-scattering environments when fractional Doppler is considered. In this letter, we first propose an iterative receiver under framework expectation...

<div class="section abstract"><div class="htmlview paragraph">High-speed railway (HSR) hubs play a pivotal role in the integrated transport system, efficiently connecting various modes of and facilitating integration. Characterized by their large scale, complex functional spatial layouts, diverse interchange types, these see growing proportion passenger traffic annually. Thus, studying impedance high-speed is crucial for enhancing efficiency service quality. However, current...

A new parameter-extraction procedure for symmetric coupled-resonator filters is presented. Closed-form recursive formulas are derived the synthesis of all filter parameters (resonant frequencies individual resonators and couplings between resonators) from known measured or simulated zeros poles input impedance functions singly terminated even odd-mode networks. Capable accurately predicting unavoidable spurious nearby resonators, this simple straightforward can eliminate complicated...

Massive multiple-input multiple-output (M-MIMO) can significantly enhance the spectrum efficiency of cellular networks by deploying hundreds active elements at base stations and is envisaged to become key technology in 5th generation (5G) networks. However, large number antennas required brings about tremendous challenges for practical implementation, especially separation multiplexed data. Iterative approaches, such as Jacobi, Richardson, Gauss-Seidel (GS), successive overrelaxation (SOR),...

In order to develop a fast and accurate algorithm for snapshot compressive sensing (SCI), we combine the merits of two kinds existing SCI methods: interpretability traditional model-based methods speed learning-based ones. Concretely, build novel Spatial-Temporal synErgic Prior driven unfolding network SCI, dubbed STEP-SCI, which is inspired by Half-Quadratic Splitting (HQS) optimizing reconstruction model. To better utilize correlations among frames, spatial-temporal synergic prior module...

In this paper, a novel planar Marchand balun using patterned ground plane is presented. the new design, with slot under coupled lines cut on plane, even-mode impedance can be increased substantially. Meanwhile, we propose that two additional separated rectangular conductors are placed to act as capacitors so odd-mode decreased. Design theory and procedure presented optimize balun. As an example, one double-sided PCB designed, simulated, fabricated measured. The measured return loss found...

Decentralized baseband processing (DBP) architecture, which partitions the base station antennas into multiple antenna clusters, has been recently proposed to alleviate excessively high interconnect bandwidth, chip input/output data rates, and detection complexity for massive multi-user multiple-input multiple-output (MU-MIMO) systems. In this paper, we propose a novel decentralized Gaussian message passing (GMP) DBP architecture. Based on rule, each cluster iteratively calculated local...

Multiuser detection based on the expectation propagation (EP) algorithm for massive multiple-input multiple-output (M-MIMO) system has received considerable attention in recent years due to its good performance-complexity tradeoff. However, performance degrades when is highly overloaded. Furthermore, computational complexity increases fast as number of receive antennas increases. In this work, we propose an improved EP detector via channel sparsification approach, which shortened S-EP. The...

Massive multiple-input multiple-output (MIMO) system is capable of substantially improving the spectral efficiency as well capacity wireless networks relying on equipping a large number antenna elements at base stations. However, excessively high computational complexity signal detection in massive MIMO systems imposes significant challenge for practical hardware implementations. In this paper, we propose novel minimum mean square error (MMSE) using accelerated overrelaxation (AOR) iterative...

A new parameter extraction procedure for symmetric coupled-resonator filters is presented. Closed form recursive formulas are derived the synthesis of all filter parameters from known zeros and poles even- odd-mode input impedance functions. The simple straightforward can eliminate complicated optimization routines have extensive applications in design tuning filters.

In massive multiple-input multiple-output (MIMO) system, Neumann series (NS) expansion-based linear minimum mean square error (LMMSE) detection has been proposed due to its simple and efficient multi-stage pipeline hardware implementation. However, it suffers from poor performance slow convergence as the number of users grows. To address this issue, we a novel weighted (WNS)-based LMMSE minimize between exact matrix inversion WNS-based inversion. Moreover, optimal weights are obtained...

As a novel non‐orthogonal multiple access scheme for fifth generation mobile networks, pattern division (PDMA) can support more connectivity and significantly improve spectral efficiency compared with conventional orthogonal (OMA). In order to further the system transmission reliability spectrum PDMA, PDMA framework combined multiple‐input multiple‐output (MIMO) technology by using space–frequency block coding downlink is proposed in this study. The performance analysis expressions of...

To achieve successful communication, people should decode not only the literal meaning of an utterance, but also intended meanings conveyed by speaker. In present study, event-related potential (ERP) technique was used to explore how working memory capacity modulates processes indirect replies comprehension. Conversations Speaker A and B were constructed. A's question renders B's reply be either direct or replies. Participants high low span instructed read for Our results showed that group,...

To solve the contradiction between limited spectrum resources and increasing communication demand, this paper proposes a wireless resource allocation scheme based on Deep Q Network (DQN) to allocate radio in downlink multi-user cognitive (CR) network with slicing. Secondary users (SUs) are multiplexed using non-orthogonal multiple access (NOMA). The SUs use hybrid mode improve spectral efficiency (SE). Considering demand for services, enhanced mobile broadband (eMBB) slice ultrareliable...

Harmonic magnitude control presents no particular difficulty when it uses appropriate sensors. The size, costs and accessibility of technology these hardware may, however, severely constrain the capabilities in applications. Very commonly used extremely low-resolution encoders, for instance, present two complications: 1) large quantisation errors at between successive measurements; 2) stochasticity actual amplitude given desired discrete encoder readings. This paper proposes a method which...

With the increase of power network scale, system requires higher accuracy and rapidity topology analysis. In terms identification, data-driven algorithms generally have dilemma computing running time. order to meet requirements real-time analysis on speed, a two-layer method using K-nearest neighbor algorithm for rough judgment mutual information accurate calculation is proposed. Based original identification algorithm, shortens time improves operation speed. The has been verified in IEEE...

Impulsive noise significantly deteriorates the performance of orthogonal frequency-division multiplexing (OFDM)-based underwater acoustic (UWA) communication systems. The pulse blanking (PB) based approach can mitigate impulsive noise. However, it causes inter-carrier interference (ICI) and signal attenuation to receiver. In this work, we first show that ICI introduces pronounced non-Gaussianity receiver chain leads significant degradation. We then propose a non-Gaussianity-aware iterative...

In this paper, an adaptive technique employing hierarchical M-ary quadrature amplitude modulation (M-QAM) constellations with space-time block coding (STBC) is investigated as a link layer solution to the simultaneous voice and different classes of data transmission problem over multiple-input multiple-output (MIMO) fading channels. Closed-form expressions well numerical simulation results for achievable spectral efficiency average bit error rate (BER) correlated Nakagami-m MIMO channels are...