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O protocol, focusing on the Physical Layer and Mac Layer Specifications of the protocol.Chapter II analyze the channel character of the power line communication channel, constructs a system model taking consideration of power line channels and the channel estimation algorithm based on pilots are investigated.

第二章分析了电力线载波通信信道特性，重点在于针对相应的信道特性对信道进行建模并，给出电力线信道下的信道估计方法和仿真结果。

So it holds a ideal ability to anti-interference and has 2 scalar level resolution in location and measuring velocity than traditional radio induction technology. And the channel composed of the new radio induction system for communication is different from the parameter-constant channel and the traditional parameter-changing channel, its parameter is decided by the mutual induction between its antenna and induction-cable, by the location of its antenna, by the signal frequency passing through, its parameter has nothing to do with the time parameter.

而且，由新型无线感应系统组成的信道既不是恒参信道，也不是一般目前所知的变参信道，其信道传递函数的幅值只与信号的频率有关，与系统中天线和感应电缆之间的互感和天线的位置有关，而与时间无关，其信道传递函数的相位只与天线的位置有关，而与时间无关，由新型无线感应系统组成的信道是一种不随时间变化的新型变参信道。

Ida nadi is the channel for mental energy; pingala nadi is the channel for vital energy and sushumna nadi is the channel for spiritual energy.

左脉是神经能量的通道，右脉是是生命能量的通道。中脉是精神通道。

If there is a dispute between a channel user and any one or more of the Channel Operators, the decision of the Channel Operator will take precedence.

如果有一个用户和渠道之间的任何一个或多个频道商，该频道运营商决定将优先更多的争议。

The numerical results of river channel planform change, longitudinal bed profile, channel cross section, water surface profile and channel sediment transport are analyzed and discussed.

根据模拟得到的河道平面形态、横断面形态、河床纵剖面，沿程水面线及沿程输沙率的变化，分析了河床初始比降、入口含沙量、流量和河岸抗冲性等各种因素对河型转化的影响。

Company to operate the noise and vibration measurement and analysis equipment, including from a simple integral sound level meter, single-channel real time analyzer, dual-channel real-time multi-channel analyzer to the interactive analysis system, the artificial head recording and playback system.

公司经营的噪声与振动测量分析仪器包括从简单的积分式声级计、单通道时实分析仪、双通道实时分析仪到多通道互动式分析系统、人工头录音和回放系统。

A method form obtaining IP address of maintenance channel includes judging whether ATM address is included in preconfigured IPOA PVC data of base station controller or not by BSC according to ATM address in BOOTP request message, returning BOOTP response message back to base station if it is or otherwise returning failure message back to BOOTP, carrying out judgment on each parameter in BOOTP response message by BS as per preset parameter rule, utilizing all parameters to set up IPOA channel when all parameters are consistency with said rule and required transmission bandwidth of IPOA channel is less than bandwidth limitation of maximum transmission.

本发明提供一种维护通道IP地址的获取方法以及修改方法，包括：在基站控制器侧预先配置基站的维护通道IPOA PVC数据，该IPOA PVC数据包括该基站的ATM地址；该基站在专用的PVC上发送BOOTP请求消息，该BOOTP请求消息中包括该基站的ATM地址，并且同时启动超时定时器对第一时间间隔计时；基站控制器根据该BOOTP请求消息中的ATM地址，判断基站控制器中预先配置的IPOA PVC数据中是否包括该ATM地址，若包括，则向该基站返回BOOTP响应消息，该BOOTP响应消息包括关于维护通道IP地址的参数，否则返回BOOTP失败消息；基站根据预定参数规则，对该BOOTP响应消息中的每一参数进行判断，在所有参数符合预定参数规则、且建立该IPOA通道所需传输带宽小于最大传输带宽限制的情况下，利用该所有参数建立IPOA通道。

This paper presents a theoretical analysis of time-hopping pule position modulation ultra-wideband communication system under time-varying channel condition. The effect of scatters movement is analyzed under indoor channel condition with different channel parameters by simulation.

分析了时变信道环境条件下TH-PPM-UWB系统的性能，并通过计算机仿真研究了室内信道环境中，散射体移动对不同参数条件下系统性能的影响。

Based on the work by the forerunners, this paper do some investigation about various kinds of data transmission format, for example, CBERS-1-02B CCD double channel data transmission, WFI and IRMSS, SPOT-2/4 single channel multiple work modes, LandSat 5 TM multi frame structure, HJ-1A/B single channel multiple sensor and so on, make some conclusion about the common parts of transimission foramt of different sensors, which meet the requirement of easy production, extraction and transmission, at the same time, the author made the quick view data format which is fit for multiple satellites and sensors.

作者在总结前人研究工作的基础上，结合国家对航天对地观测地面系统一体化和数据标准化的要求，针对光学、红外、高光谱等传感器卫星原始数据格式，如：CBERS-1-02 卫星的CCD、WFI与CBERS-1的IRMSS多通道多传感器数据传输格式的特点；SPOT 2/4的单通道多工作模式数据的特点；LandSat5卫星TM复帧数据结构数据的特点；针对HJ-1A/B卫星单通道多传感器数据传输格式的特点等原始数据格式进行了详细分析，总结不同传感器数据格式的共性部分，满足数据格式便于生成、解析和传输的特点，研究制定了适用于多种卫星、多种传感器的快视数据格式。

For the instability of the wireless channel and remotion of the terminal, the performance of the wireless channel is not good as the one of the wire channel, which is not fit for transmitting high-speed date.

中文摘要：无线信道的衰落效应和终端的移动严重制约了通信系统的性能，因此克服信道衰落效应，提高频谱利用率，确保数据高效可靠的传输是个非常重要的研究问题。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。