Question

通信工程专业英语论文翻译

RESEARCH OF CELLULAR WIRELESS COMMUNATION SYSTEM
Abstract
Cellular communication systems allow a
large number of mobile users to seamlessly and simultaneously communicate to
wireless modems at fixed base stations using a limited amount of radio
frequency (RF) spectrum. The RF transmissions received at the base stations
from each mobile are translated to baseband, or to a wideband microwave link,
and relayed to mobile switching centers (MSC), which connect the mobile
transmissions with the Public Switched Telephone Network (PSTN). Similarly,
communications from the PSTN are sent to the base station, where they are
transmitted to the mobile. Cellular systems employ either frequency division
multiple access (FDMA), time division multiple access (TDMA), code division
multiple access (CDMA), or spatial division multiple access (SDMA).
1 Introduction
A wide variety of wireless communication systems have been developed to provide
access to the communications infrastructure for mobile or fixed users in a
myriad of operating environments. Most of today’s wireless systems are based on
the cellular radio concept. Cellular communication systems allow a large number
of mobile users to seamlessly and simultaneously communicate to wireless modems
at fixed base stations using a limited amount of radio frequency (RF) spectrum.
The RF transmissions received at the base stations from each mobile are
translated to baseband, or to a wideband microwave link, and relayed to mobile
switching centers (MSC), which connect the mobile transmissions with the Public
Switched Telephone Network (PSTN). Similarly, communications from the PSTN are
sent to the base station, where they are transmitted to the mobile. Cellular
systems employ either frequency division multiple access (FDMA), time division
multiple access (TDMA), code division multiple access (CDMA), or spatial
division multiple access (SDMA) .
which offers
flexibility in the analysis. In this chapter, we present a simple example of a
simulation of a cellular communication system, with the emphasis on the system
aspects of the communication system, including multi-user performance, traffic
engineering, and channel reuse. In order to conduct a system-level simulation,
a number of aspects of the individual communication links must be considered.
These include the channel model, the antenna radiation pattern, and therelationship between Eb/N0 (e.g., the SIR) and the acceptable performance

Answer 1

蓝牙技术允许信息存储在手机上可以显示在电视上，也可以变换分析的信息，以便在电脑上听声。

蓝牙技术的传输速率设计到1MHz。实现全双工通信的时间division.The的协议是区为基础的电路交换和分组交换的组合。

通过无线芯片接收器与蓝牙技术的电子产品能够在十公尺，可连接传输速度可以达到每秒1万亿字节。

蓝牙技术是一种新的无线传输，在1998年推出。它实际上取代数据电缆的短距离无线通信技术，通过实现低带宽的点至点广播，或点对多点链路之间的信息交流。

点，以点传输，无线红外传输是一种，它是必要的，在准确的方向，而不是很远的地方。如果在中间有障碍物时，它不能穿过墙壁，且无法控制信息传输的速度。

Answer 2

http://wenku.baidu.com/view/d081f9b565ce0508763213ff.html 貌似找到原文了