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In this paper, an advanced receiver design based on DVB-S2 standard is proposed for satellite downlink transmission over the X-band, which is capable of supporting over one Gbps high data rate transmission on a 375 MHz bandwidth without the need to tackle the rain fade effect. We illustrate its baseband design and implementation details including frame detection, timing and frequency synchronization,...
This paper presents an overview of a new very high throughput millimeter-wave WLAN system operating at 45 GHz band. We begin by reviewing standards process of IEEE 802.11aj (45GHz). Then the frequency spectrum allocation at 45 GHz band is introduced. Next, the channel measurement and mod-eling is given. Specifically, the millimeter-wave MIMO for physical layer enhancement is given in detail.
A novel two staged and user requirements oriented Dynamic Web Service composition framework is presented in this paper. Firstly, we separate the end user requirements into two parts:functional and non-functional requirements. Consequently, with user requirements in OWL-S, the composition firstly uses JSHOP2 technique to generate an Abstract Service Plan to satisfy user functional requirement. In the...
To solve the difficulty of real-time target tracking in long gray-scale image sequence, an improved method based on gray-scale density distribution estimation technique is proposed. A single robust M-estimation framework the matching of local gray-scale distributions is employed. To represent the target distribution model more approximately, a 3D joint spatial and gray-scale value space is defined,...
Dynamic web service composition is a key technology for building the service-oriented, loose coupling and integrated applications. In a Web service composition system Web services can be selected and integrated to generate a workflow for the satisfaction of user functional requirements. Usually, for each task in the workflow a set of alternative Web services with similar functionality is available,...
Peak to average power ratio (PAPR) is one of the key parameters for efficient power amplification in multicarrier systems. Practical implementation difficulties and the performance constraints are two major limiting factors for many of the methods suggested for PAPR reduction. It is in this context, this paper suggests a simplified approach for PAPR reduction of multicarrier CDMA systems based on...
A non-rigid feature registration method using the Hausdorff distance is presented in this paper. Based on B-splines, the proposed method is able to handle elastic deformations between the images to be registered. Since no correspondence needs to be established between two point sets, the method is robust to outliers. The performance of the proposed method is demonstrated and validated in two image...
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