The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Owing to the elevated intra/inter variation among the foreground and background text of various document images, the text segmentation from the poorly degraded document images is the difficult job. This paper presents the document image binarization method by adaptive image contrast which is the integration of the local image gradient and the local image contrast which is lenient to background and...
Modern scientific instruments, such as detectors at synchrotron light sources, can generate data at 10s of GB/sec. Current experimental protocols typically process and validate data only after an experiment has completed, which can lead to undetected errors and prevents online steering. Real-time data analysis can enable both detection of, and recovery from, errors, and optimization of data acquisition...
In this paper, an improved and low-complexity signal detection approach for large-scale multiple-input multiple-output (MIMO) systems has been proposed. This approach utilizes the preconditioning technique to accelerate the conventional detection algorithm based on Gauss-Seidel (GS) iterative method, and achieves a detection performance close to the minimum mean square error (MMSE) detection algorithm...
Current technology used for monitoring fetal well-being has been ineffective at reducing rates of harm to the fetus during the intrapartum period, yet its adoption has significantly increased the number of emergency C-sections performed. Transabdominal fetal pulse oximetry (TFO) aims to reduce the number of surgical interventions through non-invasive measurements of fetal oxygen saturation. When developing...
Currently the multichannel readout chip for GEM detectors with an asynchronous architecture is being developed. The paper describes the 32-channel chip for GEMs and the test results of the chip building blocks. The chip includes the full readout channel with analog front-end and digital back-end. The channel includes a preamplifier with fast and slow CR-RC shapers, discriminator with a differential...
This paper deals with an unsupervised approach for land change detection and extraction using bitemporal and multispectral remotely sensed images. It is a statistical approach based on multivariate alteration detection (MAD) transformation combined with a new ChiMerge thresholding method. As opposed to most other multivariate change detection schemes the MAD technique is invariant to affine transformations...
In this paper, we propose to analyze the performances of the Multiple pulse Cell Averaging based on Lookup Tables detector (M-pulse CA-LT), considering range spread targets embedded in Non Gaussian clutter. Under the assumption of Weibull clutter samples with unknown parameters, we introduce the pulse-to-pulse Moments (MOM) estimation approach. The latter estimates the shape and the scale parameter...
Sparse code multiple access (SCMA) is a promising non-orthogonal multiple access scheme to support massive connectivity. In this paper, we propose a novel scheme to analyze the performance of Low-density Parity-check (LDPC) codes in SCMA systems based on density evolution (DE) theory. In particular, we develop the combination method including channel adapter and log-likelihood ratio (LLR) convertor...
By adopting multiple-input multiple-output (MIMO) technique, the spectral efficiency and data rate of wireless communication systems can be highly improved. To fully take the advantages of MIMO, belief prorogation (BP) detection methods are considered as a way in balancing the hardware complexity and error performance. Also with BP methods, polar code, which has been adopted by 3GPP eMBB control channel,...
As an alternative to classical multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM), MIMO-OFDM with index modulation (MIMO-OFDM-IM), which provides a flexible trade-off between spectral efficiency and error performance, has attracted considerable interest recently. However, in order to detect the active subcarrier indices and modulated symbols precisely, the receiver...
The scaling up of antennae and terminals in large-scale multiple-input multiple-output (MIMO) systems helps increase the spectral efficiency at the penalty of prohibitive computational complexity. In conventional linear detection such as the minimum mean square error (MMSE) signal detection, the high complexity is mainly caused by solving the inversion of random matrix, especially in large-scale MIMO...
Automatic parking systems have significant effects on intelligent transport systems (ITS) and have been extensively researched. However, most existing vision-based automatic parking slot detection methods cannot obtain the desired results due to variation in light intensity or complex obstacle conditions. Besides, most previous parking slot detection methods only consider the target position occupied...
Ambient backscatter is a new technology that utilizes environmental wireless signals to enable battery-free devices to communicate with each other. In this paper, we investigate the problem of signal detection for the full duplex wireless system utilizing ambient backscatter. Since one of the key technologies of full duplex wireless system is self-interference cancellation, we first estimate the channel...
Route planning for freight and personal navigation in urban areas is rather difficult because optimal route is not only distance-but also time-dependent. This task often depends on varying traffic conditions which can be influenced by different factors. Optimal route planning is therefore dependent on the time of the day and of the day in the week for different urban areas. One of the usual solutions...
The demand for radio spectrum is rapidly increasing for applications such as mobile telephony, digital video broadcasting (DVB), wireless local area networks (WiFi), and wireless sensor networks (ZigBee), and internet of things. Indeed, these resources are becoming increasingly scarce or even nonexistent. This scarcity has led to the concept of Cognitive Radio (CR) communication which has used to...
In this paper, we propose a real-time detection algorithm using a MCT AdaBoost classifier which detects two-wheeler in a blind spot. The proposed algorithm uses a cascade classifier generated by AdaBoost learning based on the MCT feature vector. The MCT AdaBoost classifier is composed of weak classifiers as many as the number of pixels of the detection window, and each pixel becomes a weak classifier...
This paper considers a multiuser massive multiple-input multiple-output (MIMO) uplink transmission with the help of an Nr-antenna amplify-and-forward (AF) relay. Assume that the base station (BS) is equipped with a large array of Nd antennas but supported by a far smaller number, K, of radio-frequency (RF) chains, which greatly reduce hardware complexity and cost. A hybrid processing is proposed to...
This paper concerns the uplink (UL) and downlink decoupled access in heterogeneous networks (HetNets) with multi-antenna base stations (BSs). Departure from the traditional minimum pathloss policy, a maximum UL signal-to-noise ratio (SNR) user association policy that takes account of multiple antennas at BSs is proposed. Based on the proposed association policy, the UL association probabilities and...
A 2 × VDD output buffer with process, voltage and leakage compensation technique is proposed to keep slew rate (SR) self-adjusted within predefined ranges regardless PV variations. Low Vth (threshdold voltage) transistors are employed in the stacked driving transistor strings to boost the driving current. On the other hand, a leakage detection loop is added at the gate drives of these low Vth transistors...
In this paper, we present a generalized polyphase representation for Continuous Phase Modulation (CPM) signals suited to the detection over frequency-selective channels. We first develop two different equalizers based on this representation and relate them to the State of Art. We also derive a Least Squares (LS) channel estimation and an improved LS estimation using a priori on the channel. Simulation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.