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.
The usage of system bandwidth is restricted when coding multi-component linear frequency modulation (LFM) source signals that used in multi-beam systems, and the multicomponent echo signal will exist serious time-frequency superposition if the frequency bands of the signal components are overlapped. For solving these problems, a new multi-component LFM source signal coding technique based on fractional...
By solving a linear inverse problem under a sparsity constraint, one can successfully recover the coefficients, if there exists such a sparse approximation for the proposed class of signals. In this framework the dictionary can be adapted to a given set of signals using dictionary learning methods. The learned dictionary often does not have useful structures for a fast implementation, i.e. fast matrix-vector...
In this paper a modified Omega' metric, depending on signal to noise ratio (SNR), is proposed. This metric is more suitable for choosing of quadratic permutation polynomial (QPP) interleavers, because it is closer to the upper bound of frame error rate (FER). The minimizing of this metric leads to the better choice of the polynomial from the error rate point of view, between an interleaver with maximum-spread...
This paper deals with and details the design of a power-aware adaptive digital image rejection receiver based on blind-source-separation that alleviates the RF analog front-end impairments. Power-aware system design at the RTL level without having to redesign arithmetic circuits is used to reduce the power consumption in nomadic devices. Power-aware multipliers with configurable precision are used...
An improved direction-of-arrivals (DOAs) estimation via phase information of sparse solution is presented in this paper. Unlike the conventional sparse source localization approach using the amplitude of sparse solutions only, through a special partition of the receiving data of the sensors, the phase information of the available sparse solutions is also extracted to estimate DOAs. For the true DOAs...
Due to the simplest way for PAPR reduction, clipping technique have been proposed and seem to be promising for use in commercial systems. In this paper, the conventional clipping technique is formulated as an adding signal technique for PAPR reduction. We show that, when clipping occurs very rarely, the adding signal for PAPR reduction commonly called ldquopeak-reducing signalrdquo or ldquopeak-cancelling...
We present a new ldquoshoeboxrdquo room acoustics simulator that is designed to support research into signal processing algorithms that are robust to reverberation. It is an improvement over existing room acoustics simulators because it is computationally fast, portable to many kinds of research environments, and flexible to use. The proposed simulator is also perceptually accurate because it models...
Sensitivity to carrier frequency offset (CFO) is one of the main drawbacks in OFDM system. This paper focuses on the CFO estimation algorithm based on virtual carrier (VC), and proposes a method on how to choose VCs reasonably in order to both estimate the CFO correctly and reduce the amount of calculation. Simulation results based on Matlab have verified the validation.
The estimation of an unknown parameter vector in a Gaussian linear model is studied in this paper. Two different cases are analyzed: the parameter vector is assumed to lie either in or on a given ellipsoid. The best estimator in terms of the mean squared error is derived. The performance of this estimator is analyzed and compared with the ordinary least squares, the constrained least squares and the...
This paper investigates the use of genetic algorithms in the identification of Wiener model. The parameters describing the linear system and the static nonlinearity are estimated from input-output measurements by minimizing the error between the actual and identified systems. Using genetic algorithms, systems with non-minimum phase characteristics can be identified. Simulation results reveal the effectiveness...
This paper reports the first results of the use of wavelet transform to process ultrasound signals used for estimating temperature in a non-invasive way.
The ground vias are used to interconnect the different ground planes existing in a package structure, but also to prevent the propagation of parasitic modes like the parallel-plate mode inside the structure. From a signal integrity perspective, these parasitic modes degrade and limit the performance of a package since they introduce undesired resonances in the electrical response of the structure...
This paper analyze theories of the software wireless in detail, elaborate the technique theories and way of modulator,In the further research mid-frequency numeral modulating and signal processing, combine to modulating way in common usely in the correspondence, tallied up a few kinds of arithmetic of mid-frequency numeric modulate, give out the MATLAB process in imitate reality, put forward general...
As a basis of an intelligent driving assist system, an on-line calculation method calculating a desirable driving path based on information and prediction of surrounding traffic environment is developed. The problem is how to use information of traffic jam and signal. This paper reports an automobile optimal driving control system using information of traffic jam and signal based on the model prediction...
Localization is one of the most important research issues in wireless sensor networks (WSNs). Hop-count based localization has been proposed as a cost-effective alternative to the expensive hardware-based localization schemes. In this paper, we propose a new method to estimate distances between anchors and nodes based on hop-count information. Localization is then achieved using the estimated distances...
Car manufacturers, research institutions and governments are challenged by decreasing the number of road traffic fatalities in spite of rapidly increasing traffic volumes. One approach is to enhance the ldquointelligencerdquo of modern cars in anticipating dangerous driving situations. Besides wireless communications with the traffic environment, context perception enabled by well-known technologies...
The application of environment sensor systems in modern - often called ldquointelligentrdquo - cars is regarded as a promising instrument for increasing road traffic safety. Based on a context perception enabled by well-known technologies such as radar, laser or video, these cars are able to detect threats on the road, anticipate emerging dangerous driving situations and take proactive actions for...
This paper proposes a filter bank structure for the reconstruction of uniformly sampled signals from nonuniform samples, on the basis of a conventional filter bank framework. First, a digital representation of filters used in the filter bank is derived. Next, an efficient filter bank structure is also provided. A proposed scheme includes DFT modulation of a fixed prototype filter and simple fractional...
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.