Community detection is one of the popular research topics in field complex networks analysis. It aims to identify communities, represented as cohesive subgroups or clusters, where nodes same community link each other more densely than others outside. Due interpretability, simplicity, flexibility, and generality, nonnegative matrix factorization (NMF) has become a very ideal model for lots related methods have been presented. To facilitate on NMF-based detection, this article, we make...

Agriculture is one of the main economic industries a country. Application information technologies in agriculture, smart aims to realize precision control irrigation, fertilizer, diseases, and insect pests prevention growing crops. For sake obtaining interest data, wireless sensor networks (WSNs) are used collect data farm field send obtained servers via communication. Since WSNs usually operate unlicensed spectrum, available resource elements (REs) scarce especially when large number nodes...

This paper proposes a novel multi-level frame interpolation scheme by exploiting the interactions among different levels. The proposed includes three major stages that work at block level, pixel and sequence respectively. Effective algorithms are designed for each stage, i.e., block-level motion estimation with dropping unreliable vectors, pixel-level vector-guided partial scale-invariant feature transform flow matching, sequence-level 3-D total variation regularized completion. Compared to...

Community detection is of great help to understand the structures and functions complex networks. It has become one popular research topics in field networks analysis. Due simplicity, flexibility, effectiveness better interpretability, Nonnegative Matrix Factorization (NMF)-based methods have been widely employed for community detection. However, most existing NMF-based are linear their performance limited when facing with diversified structure information. In view this, we propose a...

Orthogonal frequency division multiplexing with index modulation (OFDM-IM) is a promising multicarrier transmission technique. In OFDM-IM, only subset of subcarriers are activated to transmit modulated symbols and the indices used convey information bits implicitly. coded OFDM-IM system, we need calculate log likelihood ratio (LLR) value each bit, whose computational complexity extremely high due dependence between caused by subcarrier-index modulation. this letter, propose novel simplified...

Vibration signals of complex rotating machinery are often cyclostationary, so in this paper one novel method is proposed to detect and predict early faults based on the linear (almost) periodically time-varying autoregressive (LPTV-AR) model. At first algorithms identifying model parameters order presented using higher-order cyclic-cumulant, which can suppress additive stationary noises improve signal noise ratio (SNR). Then numerical simulations done results indicate that more effective for...

In existing reconfigurable intelligent surface-assisted joint active and passive transmission (RIS-JAPT) schemes, the shares same receiver, which cannot apply to distributed reception (DR). this paper, we propose a novel RIS-JAPT scheme, named RIS-JAPT-DR, meet requirement of receiving information in manner. whole RIS is virtually partitioned into two groups, one for facilitating other enabling by mapping antenna index receiver. Approximate bit error rate (BER) expressions are derived...

Multiple-input multiple-output orthogonal frequency division multiplexing with index modulation (MIMO-OFDM-IM) is a relatively new multicarrier transmission technique for the MIMO systems to achieve both energy and spectral efficiency. However, due dependence of subcarrier symbols introduced by modulation, existing detection techniques cannot be applied in MIMO-OFDM-IM as it will lead erroneous on information active subcarriers further deteriorate system performance. In this paper, we first...

It has been proven that performance of video coding at low bit rates can be improved by down-sampling a before compression and then using super-resolution to up-sample it after decompression. Such techniques are especially important for limited bandwidth communications. In this paper we propose an adaptively based (DBC) method which performs rate distortion (RD) optimization determine the structure between regular coding. order restore original resolution coded signals, hybrid (SR) algorithm...

As an improved multicarrier transmission technique of orthogonal frequency division multiplexing (OFDM), OFDM with index modulation (OFDM-IM) has attracted great attention for its flexible design the frame and better bit error rate (BER) performance compared that classical OFDM. In this paper, we investigate optimal frequency-domain OFDM-IM to achieve maximum capacity over frequency-selective Rayleigh fading channel. Unlike conventional same selected probability each active indices...

Food safety is closely linked to public life and has drawn great attention from society. In order reduce the threat food safety, it significant detect track detail information about entire supply chain. Therefore, urgent establish a safe reliable traceability system. Internet of Things (IoT) enabled food. However, it's consist larger number IoT devices, which led an explosive growing in data traffic networks. To support enormous requirements on traffic, non-orthogonal multiple access (NOMA)...

High effectiveness and high reliability are two fundamental concerns in data transmission. Non-orthogonal multiple-access (NOMA) technology presents a promising solution for high-speed transmission, which has long been pursued by academia industry. However, there is still significant road ahead it to effectively support wide range of applications. This paper provides comprehensive study, comparison, classification the current advanced NOMA schemes from perspectives single-carrier (SC)...

Abstract As an emerging technique, index modulation (IM) can improve the system bit error rate (BER) performance due to robustness of bits over conventional modulated symbol bits. The existing IM aided orthogonal frequency division multiplexing (OFDM) schemes only employ one modulator at transmitter, which transmits a small amount in each transmission. In this paper, novel called cascade (CIM), is proposed increase proportion transmission by combining with multiple‐mode together....

Non-orthogonal multiple access (NOMA) has been widely nominated as an emerging spectral efficiency (SE) technique for the next generation of wireless communication network. To meet growing demands in massive connectivity and huge data transmission, a novel index modulation aided NOMA with rotation signal constellation low power users (IM-NOMA-RC) is developed to downlink transmission. In proposed IM-NOMA-RC system, are classified into far-user group near-user according their channel...

As a new candidate waveform for the next generation of mobile communications, orthogonal chirp division multiplexing (OCDM) has attracted growing attention its high spectrum efficiency and robustness to narrow-band interference or impulsive noise. Under vehicular communication channels with multiple lags Doppler shifts (MLMD), signal suffers doubly selective (DS) fadings in time frequency domain, data symbols modulated on chirps interfere each other. To address problem symbol detection OCDM...

In recent years, orthogonal chirp division modulation (OCDM) has gained attention as a robust communication waveform due to its strong resistance both time-domain and frequency-domain interference. However, similar frequency multiplexing (OFDM), OCDM suffers from high peak-to-average power ratio (PAPR), resulting in increased hardware costs reduced energy efficiency of the transmitter's amplifiers. this work, we introduce novel unitary transform called Generalized Discrete Fresnel Transform...