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数字通信技术的收集与介绍 希望对大家有用( Communicate)
An Energy-Efficient MAC Protocol for Mobile Ad hoc Networks
航空航天通信技术一般采用模拟通信的频率调制和数字通信的移相键控调制方法。这有利于充分应用信道带宽和能源。频率调制是在一定程度上改变载波或副载波的频率来传输信息的调制方法。移相键控调制是利用载波或副载波的相位跳变来传输信息的调制方法。移相键控又分二相移相键控、四相移相键控和多相移相键控,其中以四相移相键控和八相移相键控调制方法的效率较高(Aerospace communications technology commonly used analog communication of frequency modulation and the digital communication phase shift keying modulation method. This is helpful for making full use of channel bandwidth and energy. Frequency modulation is changed to some extent carrier or subcarrier frequency to transmit information modulation method. Phase shift keying modulation is the use of carrier or subcarrier phase jump to transmit information modulation method. Phase shift keying and binary phase shift keying, four phase shift keying and multiple phase shift keying, of which four phase shift keying and eight phase shift keying modulation method of high efficiency )
In this paper the various technologies available so far for wireless transmission of electricity and the need for a Wireless System of Energy Transmission is being discussed to find its possibility in actual practices, their advantages, disadvantages and economical consideration.
无线通信网络的发展趋势之一是将各种不同无线接入技术进行融合。多接入选择作为无线资源管理中的关键技术是目前异构网融合的研究热点之一。从用户的利益出发,充分考虑预接入网络的费用、QoS 和稳定性;假定不同的网络运营商之间是彼此竞争的,即没有达成统一的协议,提出了一种结合目标代价函数与层次分析法的动态多接入选择算法。通过对影响因素进行分析和二次判断,建立了网络选择决策模型,仿真结果验证了该算法的正确性与有效性。(Trends in wireless communication network is one of a variety of different wireless access technologies will be integrated. Multi-access radio resource management in selection as the key technology is the integration of heterogeneous networks of research focus. From the user' s interests fully into account the cost of pre-access networks, QoS and stability assumed between different network operators are competing with each other, that did not reach uniform agreement, proposed a combination of objective cost function and level analysis of dynamic multi-access selection algorithm. Through analysis of the factors affecting the judge and the second, the establishment of a network selection decision-making model, simulation results verify the correctness and validity of the algorithm.)
协作通信中译码转发方式DF协作方式实验仿真主程序。(DF collaborative experiment simulation main program)
AF,DF,CC,三种基本协作方式仿真程序(Simulation of three basic collaborative approach)
张贤达的盲信号处理讲义 包括盲源分离,斜投影。联合对角化。非负矩阵分解的介绍(blind source separation by Pro. Zhang xian da.)
Analysis of Load Dependency of Handover Strategies in Mobile Multiaccess Ambient Networks
the file is implimented in C++ for wimax network it is explication of qualitie of service
关于蓝牙的设计 基于蓝牙技术的无线数据采集系统(The design is based on Bluetooth technology Bluetooth wireless data acquisition system)
收集了华为五轮面试的经验,还有中兴通信的面试宝典,非常不错的资料 (Huawei five interviews to collect experience, and ZTE interview book, very good information)
SIM卡为表示能够执行proactive command且支持SAT,它必须在文件EFphaseTKG EFsst中有相关数据。 Phase文件指的是SIM卡所支持的GSM标准的级数,值为3则指SIM卡支持GSM phase 2和设置下传功能(profile download)。SST文件包含支持哪些GSM性能的准确信息。(SIM card that can support the implementation of proactive command and the SAT, it must file EFphaseTKG EFsst have relevant data. Phase document refers to the SIM card supports the GSM standard series, a value of 3 means the SIM card supports the GSM phase 2 and settings transfer function (profile download). SST file which contains support for GSM performance of accurate information.)
GMPLS中的相关信令协议RSVP仿真代码,网上下载的,希望能适合大家(Related signaling protocols in GMPLS RSVP simulation code, download, and I hope we can fit)