Advanced Materials Research Vols. 756-759

Abstract: Automatic identification of the communication signal modulation mode is a hot topic of research in the signal processing field in recent years. It is an important part of electronic countermeasures, and also a rapidly developed field of signal analysis. Communication signal modulation recognition is widely used in signal confirmation, interference identification, radio listening, signal monitoring, as well as software-defined radio, satellite communications and other fields. This paper proposed a digital modulation signal automatic recognition algorithm for satellite communication applications,. The algorithm uses the higher order cumulants of modulating signal, combined with constellation map features, to classify the signal. It has invariance in signal amplitude and phase deviation, and inhibits the additive Gaussian noise at the same time. Compared with other identification algorithms, it has the characteristics of stability and wide application. Computer simulations show that, under the given data length and moderate SNR conditions, a higher recognition rate (> 95%) can be obtained.

Abstract: In reconfigurable systems, how to take full advantage of the limited reusable resource through configuration information to achieve better system function is difficult. In this article, an optimization algorithm of resource allocation for reconfigurable Boolean function logic computation resource based on cupidity arithmetic ideas is proposed, which is used in reconfigurable design for stream cipher algorithm. The algorithm selects a series of configurations from several different configurations of Boolean functions in order to get the best result overall in achieving optimal utilization of reconfigurable resources. The algorithm's time complexity is O (nm), space complexity is S (nm). Finally, an application example is given.

Abstract: Along with the constant development and popularization of computer, computer application becomes more and more widely, meanwhile the computerized design technique is also is constantly changing and developing. This paper studies the combination of Computer Aided Design and architectural creation,analyzes and researches Computer-aided architectural design,hoping that it can induce more valuable researches in related area.

Abstract: In this paper, the subcarrier and power allocation problem for the orthogonal frequency division multiplexing (OFDM) cognitive radio network which coexists with the primary network is studied. A cognitive waterfilling (CWF) power allocation algorithm which based upon the classical waterfilling mechanism is proposed for the single SU scenario. As for multi-SU case, we present an efficient joint subcarrier and power allocation algorithm called MS-CWF algorithm. Simulation results show the effectiveness of the proposed CWF and MS-CWF algorithms.

Abstract: This paper designed method for non-volatile data storage using MCU internal data Flash, certain data Flash sector is divided into multiple data partitions, different data partition storage data copies in different historical time, the current data partition storagethe latest copy of the data; In the data read operation, first calculate the latest data copying Flash storage location, then directly reads the address. In the data write operation, first judge if the data writing position is already erased, if not,write data in next partition, while copy the other data in the current partition to the next partition; if the write position has been erased, write data directly to the current partition. This method is similar to EEPROM data read and write, easy to operate, and give a simple application interface, and can avoid the sector erase operation, to improve storage efficiency, while increasing the service life of the MCU's internal data Flash.

Abstract: According to the importance and the development status of IPTV STB(set-top boxes) , illustrates that IPTV with WiFi has an unparalleled advantage. The paper describes of WiFi technology and IPTV STB architecture in detail. Focus on the network from the IPTV STB connection mode, and one kind of WiFi wireless connection implementations is given. Finally, look ahead the development and application prospects of IPTV STB with WIFI wireless connectivity.

Abstract: According to the problem that the intelligence is not high of the soccer robot, using the mechanical theory as a guide, making some mechanical analyses and calculations on the pressure and transmutation states of chip kick mechanics, and conducting optimal design too, then making the structure of chip kick mechanics more and more rationalization. Experiments show that the new soccer robot controller features a quick response and high servo rigidity, and provide a kind of method for improving and perfecting the soccer robot control system, at the same time, filling the needs of producing.

Abstract: Integer (Mixed integer) programming is one of important mathematical programs for solving many practical problems, such as economic management, optimization control and supply chain. The integer linear programming problem and its solution algorithm are studied in this paper, and Web-based mathematical experiments of Branch-and-bound algorithm developed using Java applets. The system of the experiment can not only demonstrate the basic principle and iterating procedure of the algorithm by online example, but also solve any new integer programming inputted by user. The developed system provides users an efficient assisted learning platform with an interactive mode.

Abstract: It is usually difficult to generate a complicated report in B/S model because of the function restrictions of client browser .This paper proposes a new scheme to generate complicated report with words, tables and images using MS Word and XML. First, introduces the idea and steps of implementation, and then gives the key solutions to the problems, finally analyses the advantages of the proposed scheme. Practices prove that it works well and could create complicated reports more effectively, haves good reliability, cross-platform, high efficiency and ease of coding.

Abstract: According to the traditional IT system to integrated the parts and brings much repetition and high cost is insufficient, service oriented architecture is put forward solutions. Further introduces the service oriented architecture theory knowledge, transverse relative to the traditional development advantages, fully demonstrates the main trend of the service oriented architecture that drive. Discusses in detail the service oriented architecture (SOA), the core concept and design principles, and security measures to IBM led the company put forward using the service oriented architecture modeling, and to service the abstract concept to carry on the analysis. The core of service oriented is the component architecture and service data object, combining components and data on the part of the object oriented service principle. And Web services and SOA are compared to further understanding the connotation of SOA, and can support is given based on SOA application system of the specific technology, finally, the paper discusses the SOA further research direction.