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Relay communication network is a technique to obtain spatial diversity by using one or more relay terminals in order to improve the transmission performance. Amplifty-and-forward (AF) and decode-and-forward (DF) are two kinds of fixed relaying protocols and widely researched now. In this paper the performance of AF and DF in terms of the outage probability and the symbol error rate (SER) is analysed...
Moving vehicle segmentation in traffic videos is a challenging work because of complex background and variety objects. In this paper, we focus on detecting vehicles that are running through crossroads using the up-to-date spatiotemporal saliency model. The current saliency detection methods aim at detecting the most salient objects, novel but stationary target will be easily classified as foreground,...
Recently, studies on monitoring system have been actively conducted. For the purpose of developing an automatic crowd monitoring system, we focus on automatic crowd flow segmentation. The segmentation classifies crowd flows into some different segments according to the flow of moving objects such as people or cars. In this paper, we propose a new similarity evaluation formula which is very important...
This paper proposed a moving vehicles segmentation approach combined two kinds of classifiers which are Gaussian mixture model and spatiotemporal saliency map. We extracted new spatial and temporal saliency features and improved spatiotemporal consistency optimization model to calculate more exact saliency map and to speed up the processing. Because misclassification appears when Gaussian background...
Voice recognition technology is very important for prevention of identity crimes and cybercrimes because voice contains a lot of personal information. In this research, we propose a voice recognition system which consists of two stages of the feature extraction and identification to prevent cybercrimes. In feature extraction, noise directly affects the reason of feature extraction. Therefore, how...
Voice recognition technology is very important for prevention of identity crimes and cybercrimes because voice contains a lot of personal information. In this research, we propose a voice recognition system which consists of two stages of the feature extraction and identification. In feature extraction, noise directly affects the reason of feature extraction. Therefore, how to effectively remove noise...
The faster decoding algorithm is still required in multiple-input multiple-output (MIMO) wireless communication technology. Lattice reduction (LR) technique can improve the performance of linear MIMO detection methods. LLL (Lenstra-Lenstra-Lovasz) algorithm is one of the LR techniques and it has being extensively used for better basis of channel matrix by removing noise. LR-aided detection algorithms...
As the large-scale multiple-input multiple-output (MIMO) systems have been advanced in wireless communication, the low complexity and high performance receiver technique have been required. Recently, lattice reduction technique have attracted attention in MIMO detection. Especially, lattice reduction aided linear detection like zero-forcing (ZF) can largely improve the performance with low complexity...
Recently, the cooperative wireless communication system is attracting attention as 4G and beyond 4G techniques. Transmit rate and diversity are generally enhanced in MIMO systems, however, mobile devices are limited by size or hardware complexity to set many multi-antennas. The cooperative communication system has been proposed that enables mobiles to share their antennas as relays and obtain a virtual...
Cooperative wireless communication is a hot research area for attaining diversity through virtual antenna array that is formed by sharing resources among different users.Different strategies of resource utilization such as amplify-and-forward (AF) and decode-and-forward (DF) already exist in cooperative networks.Although the implementation of these strategies is simple, their utilization of the channel...
Sphere decoding (SD) algorithm, as one of the main vector detection mechanisms in digital communication systems, has been referred to have polynomial complexity over a wide range of signal-to-noise ratios (SNRs), rates, and numbers of antennas. The first part of this paper discusses the expected complexity of the SD algorithm over all input SNRs and numbers of antennas, and derives the upper bound...
Floorplanning is a vital phase in the physical design process of very large scale integrated (VLSI) circuit. The main objective of floorplanning is to minimize chip area. In recent years, the integration density of VLSI is increasing and the size is becoming very small. Therefore, many factors such as the increase in the temperature of the chip and complexity of circuit design are should be solved...
Cooperative communication is becoming a viable means of performance enhancement for wireless networks. It provides diversity by emulating multi-input and multi-output (MIMO) system for devices that are spatially too small to harbor multiple antennas. Conventional cooperative protocols such as amplify-and-forward (AF) and decode-and-forward (DF) attain diversity gain at a cost of reduced spectral efficiency...
Lattice reduction (LR) is a powerful technique for improving the performance of linear MIMO detection methods. The efficient LR algorithms can largely improve the performance of the linear detectors (LDs). However, there are two problems involved in the LR-aided detection algorithms. One is that, the reduced basis is still not orthogonal, and most existing LR-aided algorithms devote to find a near...
Space-time coding (STC) applied for multiple antenna systems has proved very important in attaining better diversity and multiplexing gains. Recently, virtual antenna system is emerging as a solution for spatially constrained wireless terminals to compensate for the lost benefit from the incapability of multiple antenna installation. Distributed space-time coding (DSTC) is the STC counterpart applied...
Cooperative wireless communication network provides diversity by emulating multi-input and multi-output (MIMO) system for devices that are spatially too small to harbor multiple antennas. Since mobility and easy handling require terminal miniaturization, cooperative communication is required to fill the gap for MIMO. Conventional cooperative protocols such as amplify-and-forward (AF) and decode-and-forward...
Cooperative communication is establishing itself as a viable means of performance enhancement for wireless networks. It provides diversity by emulating multi-input and multi-output (MIMO) system for devices that are spatially too small to harbor multiple antennas. Since mobility and easy handling require terminal miniaturization, cooperative communication is required to fill the gap for MIMO. Conventional...
Cooperative communications is an attractive feature for the upcoming high speed wireless networks. It provides diversity for devices that are incapable of harboring multiple antennae by emulating multiple-input-multiple-output (MIMO) system providing virtual antenna array. There are different strategies of cooperation already such as amplify-and-forward (AF) and decode-and-forward (DF). Although the...
In this paper, an automatic species identification system has been developed. Recoded data was segmented, processed, features taken out, and identified by an automatic operation. A feature quantity method based on FFT with derivative of frequency band power making use of 4-layer neural network is proposed. Comparison of the results with the 4-layer neural network has been performed on wild bird species...
Cooperative communications is a very important mechanism to provide diversity for devices that are incapable of harboring multiple antennae by emulating MIMO system. Different strategies of cooperation exist such as amplify-and-forward (AF) and decode-and-forward (DF). Although cooperation is a viable means of fighting multi path fading, it inherently induces a reduction in spectral efficiency which...
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