This paper presents theoretical analysis of a network fault tolerant hybrid cascaded multilevel converter when operated as one unit using pulse width modulation. The establishes the modulation index range where voltage balance H-bridge floating capacitors is attainable independent load power factors. To realize established range, new strategy proposed that exploits third harmonic subtraction modification reference in order to extend regions around zero crossing cells capacitor balancing can...

In this letter, we focus on the performance analysis and code optimization of interleave-division multiple access (IDMA) with rate-compatible low-density parity-check (LDPC) adopted in 5G new radio (5G-NR) technical specification. By combining multi-edge type density evolution (DE) extrinsic information transfer (EXIT) analysis, a multi-edge-type DE-aided EXIT is developed to analyze asymptotic 5G-NR LDPC-coded IDMA, which shown be fairly robust against variations user number. Then, base...

In this paper, a new analysis method is introduced to predict the gap between Shannon limit and successful decoding signal-to-noise ratio threshold (SNR loss) of practical quasi-cyclic low-density parity check (QC-LDPC) codes. The SNR loss QC-LDPC code summed up from three aspects: 1) base matrix; 2) number iterations for decoding; 3) finite codeword length. As an example, DVB-S2 ATSC 3.0 LDPC codes analyzed with proposed method. Results show that large portion due their matrices, which...

Cellulose acetate (CA) grafted with imidazole ionic liquids (CA-ILs) was synthesized by reacting CA ([HO2CMmim]Cl, [HO2CEtmim]Cl, and [HO2CMmim]Br) using tetrahydrofuran (THF) as the solvent pyridine catalyst. The CA-IL films were fabricated casting solution method. exhibited good film forming ability mechanical properties. successful grafting of confirmed Fourier transform infrared (FTIR), 1H NMR, scanning electron microscopy (SEM), elemental analysis, degrees 2.24, 2.45, 3.30%,...

Recently, rate-compatible raptor-like quasi-cyclic low-density parity-check (RL-QC-LDPC) codes, which are a typical class of multi-edge type LDPC codes with excellent performance and high flexibility, have been adopted in the technical specification 5G new radio (5G-NR). In this paper, RL-QC-LDPC coded interleave division multiple access (IDMA), or called enhanced IDMA, is developed as non-orthogonal (NOMA)-based random solution, various spectral efficiencies can be flexibly supported thanks...

The preparation, characterization and gas separation properties of mixed matrix membranes (MMMs) were obtained from polyimide capped with ionic liquid blended metal-organic frameworks (MOFs). synthesized MOF was amine functionalized to produce UiO-66-NH2, its amino group has a higher affinity for CO2. Mixed exhibited good membrane forming ability, heat resistance mechanical properties. exclusively by permselectivity 74.1 CO2/CH4, which 6.2 times that the pure membrane. It is worth noting MMM...

Due to excellent performance and low implementation complexity, raptor-like quasi-cyclic density parity check (RL-QC-LDPC) codes have been recently selected as the coding scheme of data channel for enhanced mobile broadband applications in 5th generation (5G) cellular networks. However, non-orthogonal multiple access (NOMA) schemes with turbo joint decoding, like interleave-division (IDMA), RL-QC-LDPC designed single-user transmission face problem degradation. In this paper, RL-QC- LDPC are...

In 5th generation (5G) wireless communication networks, non-orthogonal multiple access (NOMA) is a key technique for supporting massive connectivity and high spectral efficiency. NOMA systems, the signals sent by users are superimposed at receiver, which channel (MAC) in information-theoretic perspective. this paper, we propose near-capacity multi-user bit-interleaved coded modulation with iterative demapping (MU-BICM-ID) scheme two-user Gaussian multiple-access (GMAC), especially efficiency...

Flexible and robust transmission schemes are required to support different coded modulation modes, receiver types channel conditions in future broadcasting systems. However, conventional low-density parity-check (LDPC) usually optimized towards particular scenario, may face the problem of performance degradation other scenarios. In this paper, a type quasi-cyclic spatially coupled LDPC (QC-SC-LDPC) codes, which have been recently proven be able universally achieve capacity over channels...

In this article, the evolution of two core multiple-input multiple-output (MIMO) features 5G New Radio standardization is described along with their motivations, salient designs, and demonstrated benefits. The first feature enables high spectral efficiency reduced overhead complexity in sub-6 GHz regime by exploiting frequency-domain compression angle-delay reciprocity inherent high-resolution precoding codebooks for multi-user MIMO. second feature, intended over-6 regime, facilitates...

With the worldwide deployment and rapid development of digital television terrestrial broadcasting (DTTB) systems, demands diversified multimedia services from fixed/mobile receptions increase significantly. To satisfy various requirements quality service, forward error correction codes with multiple code rates lengths become a trend for DTTB standards. In this paper, rate-compatible length-scalable raptor-like quasi-cyclic low density parity check (RL-QC-LDPC) are proposed future where wide...

For strong maneuvering targets, the drastic change of target motion models makes tracking methods hard to adapt and provide accurate state estimation promptly. To solve problem we propose a transformer-based network, named TrTNet. The TrTNet model learns new residual mapping from observation trajectory real trajectory. Through parallel manner, extracts single features at all time steps simultaneously. correlation information between states can be explored utilized enhance step, benefiting...

To provide massive connectivity of a large number low-power devices in machine-type communications (mMTC), advanced physical layer multiple access technologies are imperative for next generation cellular networks. In this paper, non-orthogonal (NOMA) scheme, called resource-pattern-aided bit-interleave coded access, BICMA short, is proposed mMTC to support high and flexible user load energy-efficiently with low complexity. The rate-compatible length-scalable low-density parity check (LDPC)...

The synthesis of poly(methyhydrosiloxane) (PMHS) and N,N′-bis(3-allyl)pyromellitic diimide was optimized for O2/N2 separation. membrane exhibits excellent mechanical thermal properties shows an selectivity up to 4.44 with O2 permeability 31.0 Barrer; compared polydimethylsiloxane (PDMS) pure polyimide (PI) membranes, the separation a 107% increase PDMS, permeation 660% PI. obtained results were well above ones reported on literature similar conditions opening door preparation stable...

In this paper, we investigate the impact of channel coding on two kinds non-orthogonal multiple access (NOMA) schemes, either with a successive interference cancellation (SIC) receiver or joint decoding (JD) receiver. Firstly, information-theoretic individual achievable signal-to-noise ratio (SNR) regions SIC and JD are analyzed. Then single-user-oriented (SU) code multi-users-oriented (MU) considered for JD, practical SNR these codes obtained, which provides an intuitive way to evaluate...

Recently, rate-compatible raptor-like quasi-cyclic low-density parity-check (RL-QC-LDPC) codes have been adopted in 5G new radio technical specification. This paper is focused on the construction of RL-QC-LDPC for enhanced interleave-division multiple-access (IDMA), while taking good features LDPC into consideration. Firstly, a code family optimized point-to-point transmission via progressive matrix growth algorithm. Enhanced IDMA with this shows performance at relatively low sum spectral...

Sliding window decoding has been employed as the scheme of quasi-cyclic spatially-coupled low-density parity-check (QC-SC-LDPC) codes, with latency and complexity independent coupling length but proportional to size. The size was empirically chosen at least three times constraint in previous works, which results preference QC-SC-LDPC codes small length, reduce practical systems. However, code design freedom decoder throughput are limited for these codes. In this paper, optimal under is...

<p>Non-Fungible Tokens (NFTs) do hold the promise of providing Web3 with opportunity for self-sovereignty users' physical assets. However, existing NFT marketplaces lack a generic design that allows value assets to flow efficiently. In this paper, we propose architecture Web3. The supports rapid development upper application environment and automated mapping underlying asset environment. To connect these two environments, connecter has been designed provide flexible storage data...

Steel is an important industrial raw material and plays role in construction. Studying the efficient utilization of complex refractory iron ore with large reserves great significance to ensure strategic safety China’s steel industry. Focusing on typical mixed siderite (FeCO3) hematite (Fe2O3), this paper analyzes possible ways magnetization roasting from perspective thermodynamics highlights that oxidation–reduction easy way realize application. On basis, a pilot-scale test suspension...

For major oil fields under PetroChina, the wellhead equipment is usually abundant and diverse, selected based on depth of reservoirs extraction processes. During service, prone to erosion corrosion, which can lead safety risks such as leaks. Therefore, corrosion detection high-risk in service crucial for ensuring safe operation these devices. Considering operating conditions structural characteristics equipment, applicability various non-destructive testing methods was compared, a defect...