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The success of many joint blind source separation techniques is dependent upon accurate estimation of the common signal subspace order across multiple datasets. This has stimulated the development of techniques to estimate the number of common signals across two datasets, in particular, a method that uses information theoretic criteria using the canonical correlation coefficients in the likelihood...
This paper proposes channel sounders suitable for time and frequency selective channels, i.e., double selective channels, inevitable in underwater acoustic communications (UWAC). As double selective channels in UWAC are highly dependent on their times and places, it is difficult for UWAC to define typical channel models. This paper proposes channel sounders, which transit maximum-length (M) sequence...
The effort required for the development of a software system is predicted through the cost of software estimation. Completion of project within time and budget limits is required for accurate cost estimation. Effort and cost estimation can be done through various modes. A new hybrid algorithm which is a combination of concepts of Artificial Bee Colony (ABC) and Local search procedures is used here...
Detection and localization of Partial Discharge (PD) accurately has become an increasingly important topic for researchers in High Voltage (HV) system. PD measurement helps in condition monitoring of the total power system utilities with minimal expenditure, as it acts as an evidence to fault detection prior to outage. For complex power distribution systems, it is also very essential to locate PD...
In this article, we introduce a direction-of-arrival (DOA) estimation by combining a Lüneburg lens and a frequency tunable metamaterial absorber. The Lüneburg lens is used to physically separate the multiple incident waves with different DOAs and focus them into the different focal points near the lens surface. The metamaterial absorber is set on the focal plane as a sensor array. Therefore, the DOA...
In estimating DOA of incident waves with high accuracy, we often have to take into consideration the angular spread (AS) of each wave due to reflection, diffraction, and scattering. As a method of estimating DOA and AS simultaneously, DOA-Matrix method was proposed. In this paper, we extend the array configuration from the linear array to the planar array for simultaneous estimation of DOA and AS...
This paper deals with the near-field DOA-Matrix method for source localization using a uniform linear array antenna. In general, the mutual coupling between array elements degrades the DOA estimation accuracy. In this paper, we investigate the influence of mutual coupling in source localization using the near-field DOA-Matrix method and the improved method.
The cyclic method performs the direction-of-arrival (DOA) estimation of the desired signals by using cyclic correlations of digital-modulation signals. This paper proposes a cyclic method which uses in-phase combining of multiple cyclic correlations (MCC) and the forward and backward spatial smoothing processing (FB-SSP). Also, the way of reducing the computation load in FB-SSP is provided. Computer...
This paper presents an online algorithm for mobile user speed estimation in 3GPP Long Term Evolution (LTE)/LTE-Advanced (LTE-A) networks. The proposed method leverages on uplink (UL) sounding reference signal (SRS) power measurements performed at the base station, also known as eNodeB (eNB), and remains effective even under large sampling period. Extensive performance evaluation of the proposed algorithm...
In this paper the using of methods of assessment entropy of signals for data transmission systems is given. The special processors developed with using of this methods allow optimization of signal processing algorithms.
The evaluation dependencies of the high-speed parallel ADC hardware, time, structural and functional complexity on the range of the output signal quantization and binary codes capacity were received. The prospects of mass production and use of this type of ADC in digital equipment and microelectronic technology were shown.
As the technology decreases beyond the 28nm node, the area of VLSI elements and supply voltage level reduce significantly, and the level of integration increases. This leads to new effects such as crosstalk, voltage drop at power supply rails (IR-drop effect), the substrate noise and others. The peak current becomes one of the most important factors affecting the combinational CMOS circuits design...
In this article the results of testing of numerical methods of solution of differential equations describing the systems with chaotic dynamics in MATLAB are discussed. The results of evaluation of the actual error, the global error and root-mean-square error of the numerical solution of the test differential equation system are discussed. The results of evaluation of the main radio technical parameters...
The paper deals with the estimation of the noise covariance matrices of a linear time-varying system described by the state-space model. In particular, the stress is laid on the correlation methods and a novel method, the measurement difference autocovariance method, is proposed. The proposed method is based on the statistical analysis of differenced linearly transformed and shifted measurements resulting...
Sound localization refers to a listener's ability to identify the location or origin of a detected sound in direction and distance. The traditional method of sound localization is aimed at the problem of three-dimensional localization, which requires an array of four or more microphones. Specialized research on two-dimensional sound localization is few. Although microphone arrays are also able to...
Signal estimation and its performance has always remained a challenge for wireless communication society. New techniques were developed for channel diversity and spectrum utilization. In this paper a new estimation approach based on Kalman state stabilization is proposed min-max, to achieve the objective of higher performance in MIMO system, using time variant interference modeling. A generic approach...
The need for high data rate is growing since the multimedia applications are gaining popularity which needs high data rate and quality of service. Multiple Input Multiple Output (MIMO) transmission system is one of the most promising approach of the Smart Antenna Technology which uses multiple antennas in the transmitter and the receiver side and is currently followed for high-rate wireless communication[1]...
The clustering algorithm by fast search and find of density peaks is shown to be a promising clustering approach. However, this algorithm involves manual selection of cluster centers, which is not convenient in practical applications. In this paper we discuss the correlation between density peaks and cluster centers. As a result, we present a new local density estimation method to highlight the uniqueness...
In this paper the impact of exponential correlation model on massive multiple input multiple output (MIMO) channel estimation is analyzed using a large number of antennas in the base station (BS) and a user terminal. We consider pilot-based channel estimation in the UL channel. The Linear minimum mean square error (LMMSE) estimator is used to investigate the effect of correlation factor on the average...
High resolution imaging and its processing is one of the most researched areas now-a-days. Recognition of moving object in a remote scene is a challenging task because of presence of multiple objects present there. Similarly, to track an object after the recognition part is also difficult task because of constant change in not only the coordinates of the target object but also the objects that are...
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