通信工程文献翻译——摘要：本文设计了一种基于TD_SCDMA技术的远程图像监控系统。此系统以三星公司的S3C2440为处理器，采用以LCD触摸屏为交互界面，运行Linux操作系统，通过前端摄像头采集图像信息，经视频采集压缩卡对图像进行压缩处理后，由SIM4100模块经3G网络进行实时传输，从而达到远程图像监控的目的。

关键词：图像监控;ARM; TD_SCDMA；SIM4100

1 引言

随着3G多样化业务在实际应用中的推广，原有的GPRS传输技术逐渐不能满足当今物联网飞速发展，特别是在传输速度上相差甚远，原来以GPRS无线传输网络为核心的远程监控终端将被3G终端系统所取代。本文所设计的系统是以TD_SCDMA网络传输技术为核心的新型远程监控系统。TD_SCDMA远程传输模块sim4100是支持GSM和3G双制式模块，比传统的监控系统减小了带宽占用，增加了数据传输速度,并且每一个远程监控设备都可以独立进行服务,从而大大提高了监控的灵活性，监控应用环境和范围也得到了扩大，例如森林防火、油田开采、家居安防和办公场所等环境。此系统在稳定性、实时性、处理速度、功能扩展等方面和传统的监控系统相比有着突出的优势，同时也代表着目前图像监控系统研究和发展的方向。

2 sim4100模块介绍

IM4100是一款双模TD-SCDMA模块。在GSM模式下，工作频率为三种频率：900 MHz、1800 MHz 和1900MHz，而在TD-SCDMA模式下，工作频率为 2010-2025MHz。此模块上行速率最高128Kbps ，下行速率最高384Kbps；支持RTC 带有流量控制的AT接口 ，具有增强型AT命令集。满足 3GPP（Class B）+24dBm 标准。具有80针 B2B板式连接接口，其针状图封装如图1所示。它的特点有：

1.尺寸：61.0mm X 34.0mm X 3.0mm；

2.平均闲置电流为9mA ，重量为15克；

3.支持电压范围：3.4V～ 4.5V；

4.正常工作温度：-20 ℃至 +60℃；

5.存储温度：-40℃至+85℃；

6.支持STK；

7.串行接口、天线接口等多种接口 ；

8.USB 2.0 键盘接口；

9.5*5 LCD接口；

10.具有USIM接口 ；

11.具有I2C；

12.天线接口和天线焊盘；

13.2个不同的模拟语音接口；

14.支持AMR 语音 和短信 ；

15.支持PPP协议栈 和TCP/IP协议栈。

16.它以其直观、方便、信息内容丰富等特性而将被广泛应用于工业生产、交通、电信、电力、银行、智能办公大楼......

Abstract. This article presents a remote image monitoring System based on TD_SCDMA technology. This system takes Samsung’s S3C2440 as the processor and the LCD touch screen as the interface. It runs the Linux operating system and captures image information through the front camera. After dealing with image compression by the video capture and compression card, the SIM4100 module carries on the real-time transmission via 3G network, so as to achieve the purpose of remote image monitoring.

Key words： Image monitoring; ARM; TD_SCDMA; SIM4100

I. INTRODUCTION

With the promotion of 3G diversity business in the practical application, the original GPRS transmission technology is increasingly unable to meet the rapid development of today's Internet, 

especially in the very different transmission speed. The original remote monitoring terminal which takes GPRS wireless network as the core will be replaced by the 3G terminal system. This article designs a system that takes TD_SCDMA network transmission technology as the core of the new remote monitoring system. TD_SCDMA remote transmission module SIM4100 supports GSM and 3G doual mode. Compared to the traditional monitoring system, the system reduces the bandwidth and increases data transmission speed. Each remote monitoring device is independent service, thus it greatly improves the flexible of monitoring. And the environment and scope of monitoring application has also been expanded, such as forest fire prevention, oil field exploitation, home security and office nvironment, etc. 

Compared to the traditional monitoring system, the system has outstanding advantages at stability, real time, processing speed, function expanding. And it also represents the research and development direction of current image monitoring system.

II. SIM4100 MODULE DESCRIPTION

SIM4100 is a dual mode of TD-SCDMA module, which works at 2010-2025MHz on the TD-SCDMA mode, and 900 MHz,......