The sidelobe of noncontiguous orthogonal frequency-division multiplexing (OFDM) signals is required to be deeply suppressed in the licensed user's band cognitive radio (CR) systems. To this end, we propose a novel method adding extended active interference cancellation (EAIC) suppress sidelobes and shape spectrum CR-OFDM signal with cyclic prefix (CP). For simplicity, called proposed scheme EAIC-CP. key idea EAIC-CP employ some consisting tones spaced closer than interval OFDM subcarriers...

Optical proximity correction (OPC) is an extensively used resolution enhancement technique (RET) in optical lithography. To date, the computational efficiency has become a big issue for pixelated OPC techniques due to increasing complexity of lithographic masks modern integrated circuits. This paper first apply nonlinear compressive sensing (CS) theory break through gradient-based methods. The proposed method reduces dimensionality problem by downsampling layout pattern. Then, cost function...

Extreme ultraviolet (EUV) lithography is the most promising technology for next generation very-large scale integrated circuit fabrication. EUV invariably introduces distortions in projected lithographic mask patterns and thus inverse tools are needed to compensate these. This paper develops two kinds of model-based source optimization (SMO) frameworks, referred as parametric SMO pixelated SMO, both provide primary strategies improving image fidelity lithography. In pattern defined by a few...

Research on millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) has received much attention. However, due to the propagation characteristics of mmWave, signals will suffer from a significant loss over long range transmission. The mmWave MIMO system may face challenge near-far problem where user tries retrieve information signal (IS) base station under strong intended jamming (JS). This letter proposes novel hybrid beamforming design cancel JS that significantly reduces...

To enable coexistence between an OFDM based opportunistic spectrum access system and a primary user, we proposed two novel methods called EAIC (Extended Active Interference Cancellation) EAIC-H (EAIC-Hybrid) for spectral sculpting of signal. In EAIC-H, cancellation signals are added to signal cancel interference in target band caused by data tones, so that perceived user can be limited. The (EAIC tones) has longer time duration than symbol, which enables better notching capability most...

It is well known that broadband wireless communications (BWC) are necessary for high speed vehicles since passengers need many multimedia services. However, one design challenge to identify sufficient spectrum resource support BWC in vehicles. Recently, cognitive radios (CRs) being considered as a promising technology solve scarcity problem of resource. Therefore, we investigate the allocation CR based vehicle network (CR-HSVN) this paper. Specifically, propose framework, where could...

Computational lithography is nowadays playing an indispensible role in improving the imaging performance of optical systems. This paper develops a new and powerful approach to computational by introducing information theoretical channel modeling partially coherent A statistical model built up based on characterize transfer between mask print images. Then, this calculates optimal (OIT) systems, derives limit image fidelity for proximity correction (OPC), which used extensively lithography....

Hybrid beamforming architecture is a practical implementation in millimeter-wave (mmWave) communication systems with large-scale antenna arrays for future fifth-generation (5G) cellular networks, which offers compromise between hardware complexity and system performance. Fully-connected sub-connected are two popular connected structures the hybrid architecture. However, required number of phase shifters fully-connected structure rather high when RF chains increases. Sub-connected can...

Pixelated source-mask joint optimization (SMO) plays a crucial role in improving the resolution and image fidelity of optical lithography process. However, ever growing integration density semiconductor devices incurs explosion data throughput, poses considerable challenge on computational efficiency pixelated SMO algorithms. This paper proposes to use compressive sensing (CS) effectively reduce complexity algorithm. The proposed algorithm is sequential, where lithographic source mask...

In this paper, the long term data retention characteristics consisting of three main charge loss mechanisms, detrap, trap-assisted tunneling (TAT), and lateral migration (LM), are investigated in trap (CT) 3D NAND flash memory. Three mechanisms were completely separated through experiment design, each activation energy (E <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</inf> ) was extracted with Arrhenius model well. The detrap mechanism shows...

Analog beamforming with large-scale phased arrays is an attractive technology for long-range millimeter- wave (mmWave) communication. However, the beam squint will emerge when signal bandwidth and number of antenna increase. In this end, we develop a digital compensation wideband analog architecture to eliminate squint. Specifically, view array response as frequency-selective channel, which compensated in baseband. The direction estimated design vector values using incoherent subspace (ISS)...

Photolithography is at the core of semiconductor industry that used to fabricate microscale and nanoscale integrated circuits. Inverse lithography a technique extensively compensate for patterning distortions. It refers methods pre-distort photomask patterns such their projection, through photolithography system, results in pattern as close possible intended original. However, most inverse (ILT) suffer from large computational complexity. This paper develops nonlinear compressive sensing...

Within the last years multiple-input multiple-output (MIMO) technology has revolutionized optical fiber community.Theoretically, concept of MIMO is well understood and shows some similarities to wireless systems.The interference in broadband systems can be removed by applying a spatio-temporal vector coding (STVC) channel description using singular value decomposition (SVD) combination with signal pre-and post-processing.In this contribution newly developed SVD algorithm for polynomial...

As a new wireless network access technology, IEEE 802.16 can provide broadband Internet connection to user. However, it was found that the mandatory contention resolution scheme in not run perfectly most cases, especially when traffic is heavy. In this paper, novel self-adaptive truncated binary exponential backoff has been proposed improve performance of whole network, number Subscriber Stations sending bandwidth request far more than transmission opportunities current time frame. The...

To improve the spectrum utilization, more and attention was paid to OFDM based opportunistic access (OSA) systems in recent years. In this paper, enable coexistence between a secondary user primary user, novel method called EAIC proposed for spectral sculpting of signal effectively. EAIC, however, cancellation signals cause self-interferences data tones so that symbol-error-rate (SER) performance degraded especially high order modulation such as 64 QAM. new with self-interference constraint...

Recently, cognitive radio has become a hot spot, in which secondary users could use the frequency bands when primary are absent. Hence, detection of users' presence plays an important role networks. In this paper, network with multiple licensed is considered. Secondary cooperatively detect using energy and send sensing results to base station. To minimize probability false alarm while keeping respect network, we should schedule cooperation appropriately, formulated as optimization problem....

Optical lithography is extensively used in micro and nano scale semiconductor fabrication. However, the information transmission mechanism systems not yet completely understood. This paper studies analyzes imaging process from an theory perspective. The optical system regarded as channel, approximate statistical model built to depict process, theoretical aspects of coherent are studied. Based on that, we derive mutual between mask pattern print image, well maximum transfer (MIT) system. also...

This paper studies multi-relay compressive cooperative schemes in which the source and relays utilize sensing (CS) as joint source-channel coding (JSCC). We consider four decode-and-forward (DF) strategies to forward CS measurements here, namely receive diversity, code successive decoding concatenated decoding, derive their respective achievable rates following two cases. 1) The of all help transmit message are derived under a overall power constraint. 2) Compressive with relay selection...

To improve the power communication network risk assessment techniques, we proposed a method for business. The is based on relationship model consisted of and network. According to caused by different levels business faults in physical link layer, topology layer uses probabilistic methods calculate loss element fault, then comes out simulation results show that this easy understand, can be deployed identify weaknesses through results, targeted enhance reliability or adjust service deployment, reducing

This letter presents novel mixed-timescale channel estimation algorithms for uplink multiple-input multiple-output (MIMO) relay multi-user systems, considering the property of practical dual-hop channel. With one-stage training (OST) scheme, we formulate problem based on parallel factor (PARAFAC) decomposition using received pilots at multiple time slots, where second-hop is viewed as a <italic xmlns:mml="http://www.w3.org/1998/Math/MathML"...