In order to optimize the synchronization algorithm under the low signal-to-noise ratio(SNR) environment in a global system for mobile communication(GSM)system,the improved Gaussian-filtered minimum shift keying(GMSK) modulation signal synchronization algorithm was adopted to obtain the comparison chart of signal synchronization success rate.At the receiving end the phase of GMSK was reversed first,symbolized,and be processed by synchronization algorithm with slide-relative synchronous progress.The results show that the synchronization algorithm has a higher success rate than the traditional algorithm based on the sliding of the training sequence,which can not only improve the synchronization success rate significantly in the low SNR,but also simplify the threshold calculation process.This result means a great significance to the signal modulation in the low SNR environment.

So to intensify the mine communication technology research,then can guarantee the coal mine safety and efficient production.This paper introduces the characteristics of the mine communication technology,and probes into several mine mobile communication technology application and development.

在电子信息类高职高专教育中,模拟电子线路是重要的基础课程,对电子信息专业建设和学生专业知识教学起到了重要作用.考虑到模拟电子线路学科的重要性,在整个教育中,应积极开展模拟电子线路教学改革研究,实现模拟电子线路教学模式和教学方法的创新,满足电子信息高职高专教育的需求,使模拟电子线路学科能够成为电子信息高职高专教育的重要基础课程.基于这一认识,在高校电子信息专业教学中,我们要对模拟电子线路进行深入的教学改革,提高整体课程教学效果,提升高职高专电子信息类教学质量.

Network control system (NCS) has been presenting significance in industry and automation by supporting usability and convenience. However, for insufficiency for diversity of infrastructure and scalability, it has limitations in the field of flexibility for network architecture compared to the wireless mobile network. Hence, there shows the pressing need for tackling the existing network control system with control flow by wireless mesh network (WMN) with strong flexibility effectively. Consequently, for each control system, its stability is one of the prerequisites and criteria. In this paper, a novel optimization model was developed for planning the optimal resource utilization of wireless mesh network (WMN), and then the dynamic characteristics of mesh-based network control system are analyzed and discussed.

针对接触式IC卡常用于身份认证,要求其高保密性,本文提出利用定时器的PWM输出与输入捕捉功能,设计出一种符合ISO7816协议的字符收发时序,利于ST微处理器实现一个接触式IC卡读写器。

For the demand of reliability and real-time characteristics for video collection,this paper proposes a video collection system based on FPGA.The system which adopts Cyclone Ⅱ series EP2C35F672C6 image processing chip as its core,it receives and deals with the video data from the ADV7123.According to some experiment,the common usage and mobility of system is fine.

分析了NCNN（噪声混沌神经网络）模型的几个重要参数对系统性能的影响，并对其进行了优化、、仿真结果表明，优化的算法能成功解决旅行商问题，比传统的依靠经验选择参数的方法更有效，在收敛速度同解的质量之间取得了很好的折中。

Due to the complex structure and single small and medium-scale Universal digital IC test system function which exist in current integrated circuit is designed in this paper. The test system adopts, D/A module, A/D module and the current voltage conversion circuit for the hardware. Based on the uses SOPC technique to complete the DC parameters test of the small and medium-scale digital series. Simulation shows that compared to the standard single-phase device, the results are identical. tester meets the design requirements, and the design scheme has a certain reference value. test equipment, a FPGA core boards, test of logic functions, it integrated circuits of 74 The digital IC parameters

The touch screen is the common input equipment in embedded equipments.Starting from the realization principle of the touch screen and the driver models of Windows CE operating system,this paper has designed Windows CE drivers of resistance touch screen in the embedded system and realized the design through functions based on PHILIP and UCB1400 chip.

At present, the next generation network (NGN) is a kind of focus / hot technology being discussed by both the running traders and manufacturers of the equipment , and being probed by many domestic network runners , who are setting up (or considering setting up ) the try net to go on further study . this paper gives a brief introduction to the mediia getway in the next generation network .