卫星通信

Digital transceiver is one of the key factors in satellite communication system.

在卫星通信系统中，数字收发信机是影响卫星通信质量的关键因素之一，而射频收发模块是这一关键因素的重要组成部分。

This paper presents a general method for satellite communication system design,modelling and simulation.

本文给出了卫星通信系统设计、建模和仿真的一般方法，重点是Ka频段卫星通信信道的建模及仿真。

State Bureau of Surveying and Mapping in 1992, and restructured with China Satellite Communications Corporation

督管理委员会的批准，与中国卫星通信集团公司进行重组，现为中国卫星通信集团公司的全资子公司。

The spread spectrum communications are widely used in modern military communications, satellite communications, mobile communications and command, control, communication and intelligence( C~3I ) systems, because of its well multi-address access, low probability of interception, excellent performance of anti-jamming and secrecy.

扩展频谱通信作为新型的通信方式，由于其具有多址接入、低载获特性和较强的抗干扰能力，因此在现代军事通信、卫星通信、移动通信和指挥控制通信和情报(C~3I)系统中得到了广泛的应用。

Asok Chatterjee was one of the founders of 3GPP - the organization that came into existence 7 years back and is still busy standardizing the evolution of W-CDMA-based third generation mobile wireless systems.

阿索克 查特杰博士在印度和加拿大完成了他的学业并从事电信业超过30年。他一开始是从事研发工作，之后他开始了本地与远程通信，卫星通信，无线通信包括蜂窝移动通信的事业当中。

Was founded Tyrone and in 1998, fixed assets 18 million, building the production area of 30,800 square meters, is a new professional development, production and marketing of satellite communication and mobile communication antenna technology-intensive enterprises, Products widely used in satellite communications and radio and television field, has an excellent cost-effective to receive the trust of users, with the country in recent years on the antenna of the Product Quality Control,"North" antenna with a strong wind resistance, transportation convenience, and IMPREGNATION electrostatic process, with antiseptic, sunscreen, a more elegant features such as showing its powerful strength, the market brand, sales nationwide and exported to Europe, Oceania, the Middle East, Southeast Asia more than a dozen countries and regions.

廊坊兴泰隆通信器材有限公司始建与一九九八年，固定资产1800万，建筑生产面积30800平方米，是一家新兴专业研制、生产和销售卫星通信及移动通信天线的科技密集型企业，产品广泛用于卫星通信和广播电视领域，一直以优良的性价比得到广大的用户信赖，随着近年来国家对天线产品的质量控制，&中北&天线具有抗风能力强，运输方便，并采用静电浸塑工艺，具有防腐、防晒、美观大方等特点更显示出其强大实力，成为市场名牌，销售全国，并出口欧洲、大洋洲、中东、东南亚等十几个国家和地区。

With the satellite transmission of information with the application of the increasingly widespread and establish portable satellite receiver system demand is increasing, At present, the existing satellite receiver system is based on the majority of satellite receiving stations, the system model. currently available portable antenna is also the geosynchronous satellite receiving stations typical of VSAT satellite communication systems.

随着卫星信息应用与传输的日益广泛，建立便携式卫星接收系统的需求也日益增加，而目前现有的卫星接收系统大多数是基于卫星接收站模式的接收系统，目前现有的便携式天线也是对于地球同步卫星的接收站，其典型的是VSAT卫星通信系统。

Through the incoming call transfer subsystem, the invention transfers users' incoming calls to the fixed satellite communication terminal on the plane, thus making users on plane able to communicate with users on the ground, and realizing individual air communication.

本发明利用来电转接子系统将用户的来电在乘坐飞机过程中的通信业务转移到飞机上的固定卫星通信终端，使乘坐飞机的用户随时可以与地面上的用户进行通信联系，实现了个人通信在空中的延续。

Based on the analysis of Ka-band fixed satellite communication channel,a Turbo coding scheme is present suit for the channel,having better performance improvement through using optimized channel constant.

为了提高Ka频段卫星通信的传输性能，本文在对Ka频段固定卫星通信信道进行分析的基础上，提出了一种适合该信道的Turbo码编译码方案，译码时通过使用修正的信道可靠性常数极大地提高了译码性能。

The system includes a plane-carried communication subsystem, a satellite communication subsystem, and a ground communication subsystem, wherein, the ground communication subsystem includes a first communication terminal, a second communication terminal, and a ground communication network. The ground communication subsystem also includes an incoming transfer subsystem. The first communication terminal's calling to the second communication terminal is transferred to the corresponding fixed satellite communication terminal through the ground communication network, the satellite communication terminal, and plane-carried communication subsystem according to the correspondence of incoming call transfer.

本发明系统包括机载通信子系统、卫星通信子系统和地面通信子系统，其中，所述地面通信子系统包括第一通信终端、第二通信终端、地面通信网，所述地面通信子系统还包括来电转接子系统，所述地面通信子系统中第一通信终端向第二通信终端的呼叫按照来电转接对应关系依次通过地面通信网、卫星通信子系统、机载通信系统子系统转接到对应的固定卫星通信终端。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。