3G通讯的发展与应用趋势技术篇英文版)
通讯的发展英语作文
通讯的发展英语作文Communication has evolved dramatically over the years, and it's hard to imagine how we ever got by without all the gadgets and gizmos we have today. Remember when you had to wait for a letter to arrive from a faraway friend? Now, with a simple tap on a screen, you can send a message across the globe in seconds.My parents talk about the time when they relied on a landline phone to stay in touch. If they missed a call, they had to wait for the other person to call back. But nowadays, we have smartphones that keep us connected 24/7. You can video chat with someone halfway around the world, or share a funny meme with your friends in a matter of seconds.And social media has changed the way we interact. No longer do we have to meet face-to-face to stay up-to-date on each other's lives. A quick scroll through Instagram or Facebook tells us what our friends are up to, even ifthey're thousands of miles away. It's like having a window into their world, anytime, anywhere.Of course, with all this connectivity comes a certain level of overwhelm. Sometimes, it feels like we're always "on" and never get a break. But I think the key is to find a balance. Use technology to stay in touch, but don'tforget to take time for yourself too. After all, nothing beats a good face-to-face conversation over a cup of coffee or a meal with friends.。
有关通讯的发展英语作文
有关通讯的发展英语作文The rapid advancement of communication technology has transformed the way we interact and exchange information. From the early days of smoke signals and carrier pigeons to the modern era of instant messaging and video conferencing, the evolution of communication has profoundly shaped our society and the way we connect with one another. This essay will explore the remarkable journey of communication development and its far-reaching implications.In the distant past, human beings relied on primitive methods to convey messages and share information. The earliest forms of communication involved physical gestures, facial expressions, and simple vocalizations. As civilizations emerged, more sophisticated techniques emerged, such as the use of smoke signals, drum beats, and the development of written languages. The invention of the printing press in the 15th century revolutionized the dissemination of information, making it possible to mass-produce and distribute written materials.The 19th century saw the birth of groundbreaking communication technologies that laid the foundation for the modern era. The invention of the telegraph in the 1830s allowed for the rapid transmission of messages over long distances, revolutionizing the way businesses and governments communicated. The telephone, introduced in the 1870s, took communication one step further, enabling voice-based conversations across vast geographic regions. These advancements paved the way for the subsequent development of radio and television, which transformed the way information was shared and consumed.The 20th century witnessed an explosion of communication technologies that have profoundly impacted our daily lives. The advent of the internet in the 1990s marked a turning point, ushering in a new era of digital communication. Email, instant messaging, and social media platforms have become ubiquitous, allowing people to connect and exchange information in real-time, regardless of their physical location. The rise of smartphones and mobile devices has further integrated communication into our daily routines, enabling us to access a wealth of information and stay connected with the world at our fingertips.One of the most remarkable aspects of the communication revolution is the speed at which information can be shared and disseminated. In the past, the transmission of news and updates wasoften slow and limited, with information taking days or even weeks to reach distant locations. Today, breaking news and events can be reported and shared globally within seconds, thanks to the instantaneous nature of digital communication. This has profound implications for our understanding of the world, as we are now exposed to a constant stream of information from diverse sources.Moreover, the democratization of communication has empowered individuals and communities to have a voice and actively participate in the global discourse. Social media platforms have provided a platform for people to share their perspectives, organize collective action, and challenge traditional power structures. This has fostered greater transparency, accountability, and the exchange of ideas on a scale never before seen in human history.However, the rapid evolution of communication technology has also brought about new challenges and concerns. The proliferation of fake news, misinformation, and online harassment has raised questions about the reliability and safety of digital communication. The increasing reliance on technology has also led to concerns about privacy, data security, and the potential for manipulation and surveillance.Additionally, the widespread use of communication technologies has had a significant impact on our social and psychological well-being.The constant need to stay connected and the pressure to maintain an online presence can contribute to feelings of anxiety, isolation, and information overload. The blurring of boundaries between work and personal life has also led to concerns about work-life balance and the potential for burnout.Despite these challenges, the overall impact of communication development on our society has been overwhelmingly positive. The ability to connect, share information, and collaborate across vast distances has opened up new avenues for education, healthcare, and economic development. The democratization of communication has empowered marginalized communities, giving them a voice and a platform to advocate for their rights and interests.As we look to the future, it is clear that the evolution of communication technology will continue to shape our world in profound ways. The integration of artificial intelligence, virtual reality, and other emerging technologies into communication platforms will likely lead to even more innovative and immersive ways of interacting and exchanging information. The potential for these advancements to enhance our lives, improve our understanding of the world, and foster greater global collaboration is truly exciting.In conclusion, the development of communication technology has been a remarkable journey, transforming the way we connect, shareinformation, and engage with the world around us. While there are certainly challenges and concerns that must be addressed, the overall impact of this evolution has been profoundly positive, empowering individuals, communities, and societies to thrive in an increasingly interconnected world. As we continue to explore the frontiers of communication, the possibilities for a more informed, connected, and collaborative future are truly limitless.。
3G通讯的发展与应用趋势技术篇(英文版)
each be used
Understand the IMT-2000 system
Operator
Different Period, Different Requirement
Earlier Requirement Current Requirement New Requirement
Voice Service Capacity
3G System
Other systems: EDGE DECT
Comparison of the Three Modes
WCDMA
Structure of the receiver
RAKE
Closed loop Power control
Supported
Handoff
Demodulation mode
Classification
Designation
Extremely Low
ELF
The DFirveisqiounenOcf yRadio Frequency
Voice Frequency
VF
Very-low Frequency VLF
Low Frequency
LF
Medium Frequency
Name the frequency spectrum used in GSM
Name the service area Name the two different cell types and
understand why and when each would be used. Name the concept of frequency reuse. Understand the Characteristic of radio communication
中英对照_3G移动通信应用
3G移动通信应用摘要ABSTRACT摘要：在日益增长的移动业务市场需求的推动下，3G技术正在逐步走向应用。
从目前3G网络商用情况看，用户市场与运营商对3G的期望与网络实际应用之间存在一定的差距。
在3G初期，众多的移动通信领域专家与学者们都预期3G将成为一个彻底实现普遍灵活、多样化、个性化的5A（Anyone，Anywhere，Anytime，Anydevice，Anything）方式的无缝隙宽带接入的解决方案，在网络统一性、业务综合性、服务多样性方面，3G将成为用户的理想选择。
但是，随着规范制定、产品实现、网络商用、业务提供等多方面的发展，可以看出，现有的WCDMA，cdma2000，TD-SCDMA三类技术在应用方面都面临困境。
认清这些问题，对于在移动通信产业发展中占据重要位置的移动运营商而言，具有重要的战略意义。
ABSTRACT ：Mobile services in the growing market demand driven, 3G technology is gradually applied. Commercial 3G network from the current situation, the user market and the expectations of 3G operators and network exists between the practical application of the gap.In the early 3G, many mobile communication experts and scholars are expected to 3G will be a completely universal and flexible, diversified, individualized 5A (Anyone, Anywhere, Anytime, Anydevice, Anything) method of seamless broadband access solutions, the unity in the network, business integration, service diversity, 3G will be the ideal choice for users. However, with the specification development, product realization, network business, service provision and other aspects of development, we can see, the existing WCDMA, cdma2000, TD-SCDMA technology in the application of three are facing difficulties. Clear understanding of these issues in the mobile communications industry forthe development of an important position to occupy the mobile operators, has important strategic significance.关键词：3G网络、终端、移动数字通信。
通讯科技的发展英文作文
通讯科技的发展英文作文With the rapid development of communication technology, the world has become more connected than ever before. From the invention of the telephone to the rise of social media, communication technology has revolutionized the way we interact with each other and has transformed the way welive our lives.The first major breakthrough in communication technology was the invention of the telephone in the late 19th century. This allowed people to communicate with each other over long distances, and it quickly became an essential part of everyday life. Over the years, the telephone evolved and became more advanced, with features such as call waiting, caller ID, and voicemail.In the 20th century, the invention of radio and television further transformed the way people communicated and received information. Radio allowed for the broadcasting of news and entertainment to large audiences,while television brought images and sound into people's homes. These technologies were instrumental in shaping public opinion and shaping the culture of the time.The advent of the internet in the 1990s marked a new era in communication technology. The internet allowed for the instant transmission of information and the creation of virtual communities. Email, instant messaging, and social media platforms such as Facebook and Twitter have become integral parts of modern communication. These platforms have not only changed the way we communicate, but they have also transformed the way we do business, share information, and connect with people around the world.Mobile phones have also become an essential part of modern communication. With the rise of smartphones, people can now access the internet, send messages, and make calls from anywhere in the world. Mobile technology has also revolutionized industries such as banking, healthcare, and transportation, making it easier for people to access services and information.As communication technology continues to evolve, we can expect even more changes in the way we interact with each other and the world around us. From virtual reality to artificial intelligence, the possibilities are endless. However, it is important to remember that these technologies are tools, and it is up to us to use them responsibly and ethically.In conclusion, communication technology has come a long way since the invention of the telephone. From radio and television to the internet and mobile phones, these technologies have transformed the way we communicate and interact with each other. As we move forward, it is important to continue to innovate and improve these technologies while also being mindful of their impact on society.。
通信技术的发展 英语作文
通信技术的发展英语作文题目，The Development of Communication Technology。
With the rapid advancement of communication technologyin recent decades, the world has witnessed remarkable changes in the way people interact, share information, and conduct business. This essay explores the evolution of communication technology, its impact on various aspects of society, and its potential future trends.Communication technology has undergone significant transformations over the years, from the invention of the telegraph and telephone to the advent of the internet and smartphones. These innovations have revolutionized the way individuals and organizations communicate, making it faster, more efficient, and more accessible than ever before.One of the most notable developments in communication technology is the internet. Born out of a military research project in the 1960s, the internet has evolved into aglobal network connecting billions of devices worldwide.Its impact on society has been profound, facilitating instant communication through email, social media, and messaging apps. The internet has also revolutionized industries such as commerce, entertainment, and education, enabling e-commerce platforms, streaming services, and online learning platforms to thrive.Another key advancement in communication technology is the rise of mobile devices. With the introduction of smartphones, people can now carry powerful computing devices in their pockets, allowing them to stay connected on the go. Smartphones have transformed not only how people communicate but also how they access information, manage their lives, and interact with the world around them.Furthermore, the development of wireless communication technologies such as Wi-Fi and Bluetooth has further enhanced connectivity and convenience. These technologies enable seamless communication between devices, paving the way for the Internet of Things (IoT) and smart homes where appliances, thermostats, and security systems can becontrolled remotely.The impact of communication technology extends beyond personal communication and entertainment to areas such as healthcare, transportation, and governance. Telemedicine, for example, allows patients to consult with healthcare professionals remotely, improving access to healthcare services, especially in rural or underserved areas. In transportation, communication technologies enable real-time tracking of vehicles, optimizing routes, and improving safety. In governance, digital communication toolsfacilitate transparency, citizen engagement, and government services delivery.Looking ahead, the future of communication technology promises even more exciting developments. Emerging technologies such as 5G networks, artificial intelligence, and virtual reality have the potential to further transform how we communicate and interact. 5G networks will deliver faster speeds and lower latency, enabling new applications such as autonomous vehicles, augmented reality, and remote surgery. Artificial intelligence will enhance communicationtools with features such as natural language processing, speech recognition, and personalized recommendations.Virtual reality technology will enable immersive communication experiences, allowing people to interact in virtual environments as if they were physically present.However, along with the benefits of communication technology come challenges and concerns. Issues such as digital divide, privacy, cybersecurity, and misinformation need to be addressed to ensure that the benefits of technology are equitably distributed and that users' rights and interests are protected.In conclusion, communication technology has undergone remarkable advancements, revolutionizing the way people communicate, work, and live. From the internet and smartphones to wireless technologies and emerging innovations, communication technology continues to shapeour world in profound ways. By embracing these technologies responsibly and addressing the associated challenges, wecan harness their full potential to create a more connected, inclusive, and prosperous society.。
关于通讯的发展的英语作文
The evolution of communication has been nothing short of revolutionary. As a high school student, I have witnessed firsthand the rapid changes in how we connect with one another. Its fascinating to think about how our ancestors communicated through smoke signals and carrier pigeons, and now we have instantaneous global communication at our fingertips.I remember when I was younger, my family had a landline phone. It was a bulky device with a long cord that would often get tangled. We had to be in the same room as the phone to receive calls, and if we missed one, wed have to wait for the answering machine to tell us who called and when. It was a far cry from the sleek smartphones we have today.The advent of mobile phones was a gamechanger. Suddenly, we could make calls and send text messages from anywhere. I still remember the excitement of getting my first mobile phone it was a simple flip phone, but it felt like I had the world in my pocket. I could chat with my friends, play games, and even take photos, all on a device that fit in my hand.But it wasnt just about making calls and sending texts. The internet opened up a whole new world of communication. I remember the first time I used a dialup connection the sound of the modem connecting was like music to my ears. It was slow and frustrating at times, but it was also a gateway to a vast world of information and connection.Now, with highspeed internet and WiFi, we have access to an incredible array of communication tools. Social media platforms like Facebook,Instagram, and Twitter allow us to share our lives and connect with people from all over the world. Video calling apps like Skype and Zoom have made it possible to have facetoface conversations with people thousands of miles away.One of the most significant developments in recent years has been the rise of messaging apps. WhatsApp, WeChat, and Telegram have transformed the way we communicate, allowing us to send messages, photos, videos, and even make voice and video calls, all for free. Its incredible to think that just a few years ago, sending a text message or making a call could cost you money.The impact of these advancements in communication goes beyond just personal connections. They have also revolutionized the way we work, learn, and interact with the world around us. Online collaboration tools like Google Docs and Slack have made it easier for teams to work together remotely. Elearning platforms have made education more accessible, allowing students to learn from anywhere and at their own pace.However, with these advancements come new challenges. The constant connectivity can sometimes be overwhelming, and its easy to feel like were always on. Theres also the issue of privacy and security, as our personal information is increasingly being shared and stored online.Despite these challenges, the future of communication is incredibly exciting. Were already seeing the development of new technologies like augmented reality and virtual reality, which have the potential to transformthe way we interact with each other and the world around us.In conclusion, the evolution of communication has been a remarkable journey, and its fascinating to think about where it will take us in the future. As a high school student, I feel fortunate to be part of this era of unprecedented connectivity and look forward to seeing what new innovations lie ahead.。
现代通讯演变英文作文
现代通讯演变英文作文英文，。
The evolution of modern communication has been a fascinating journey. From the days of sending messages through pigeons to instant messaging on our smartphones, we have come a long way. The advancements in technology have revolutionized the way we communicate with each other.The first major breakthrough in communication was the invention of the telegraph in the early 19th century. This allowed people to send messages over long distances in a matter of minutes. This was followed by the telephone, which allowed people to have real-time conversations with each other.The next major development was the advent of the internet. This allowed people to communicate with each other through email, instant messaging, and social media. The rise of smartphones and mobile internet has madecommunication even more convenient. We can now communicate with anyone, anywhere, at any time.However, with the rise of technology, we have also seen a decline in face-to-face communication. People are more likely to text or email instead of having a conversation in person. This has led to a lack of personal connection and understanding between people.中文：现代通讯的演变是一段令人着迷的旅程。
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Multiple Access Technologies
FDMA
Time
Time
CDMA
Code
Time
Based on codes, all users
User3
obtain traffic channels at
User2
the same time and on the same frequency band, for
Soft/hard handoff
Coherent demodulation
Chip rate (Mcps)
Mode of transmit diversity
Mode of synchronization
3.84
TSTD STTD FBTD
Asynchronous
Core network
GSM MAP
IMT-2000 Technical Specification System
WCDMA
Core Network：Based on MAP & GPRS RTT： WCDMA－FDD/TDD
TD-SCDMA
RTT Specification：TD-SCDMA
CDMA2000
Network：Based on ANSI 41 & MAP RTT：CDMA2000
MF
High Frequency
HF
Very High Frequency VHF
Ultra High Frequency UHF
Super High Frequency SHF
Contents
Development of Mobile Communication Basic Concepts of Mobile System GSM Network Architecture CDMA Network Architecture
Objectives
On completion of this section will be able to:
each be used
Understand the IMT-2000 system
Operator
Different Period, Different Requirement
Earlier Requirement Current Requirement New Requirement
Voice Service Capacity
User1
example, WCDMA and
TDMA
Frequency
CDMA2000
……
User 2 User 10 User 1 User 9
Frequency
Traffic channels at different time slots are allocated to different users, for example, DAMPS and GSM
AMPS TACS NMT 其它
Broadband service Voice service
Digital technology Analog technology
GSM
CDMA IS95
TDMA IS-136
PDC
UMTS WCDMA
cdma 2000
TDSCDMA
3G provides customers and operators with complete integrated service solutions
weather report on
demand
Low-quality videoconference
Voice
Electronic
Voice newspaper
JPEG
Electronic book Singing room Still Photos
Fax E-Mail
Mobile TV Image
Better Voice Service Some Value-added Service Large Capacity Low Operation Cost Enhance Spectrum Efficiency
Basic Voice Service, Voice Quality
High Quality Voice Lower Data Service Short Message
Name the frequency spectrum used in GSM
Name the service area Name the two different cell types and
understand why and when each would be used. Name the concept of frequency reuse. Understand the Characteristic of radio communication
Video Surveillance, Video Mail, Travel E-commerce
Telephone (Voice)
Data
Mobile Radio
Weather, transportation, news, sports and securities
Location Services
Classification
Designation
Extremely Low
ELF
The DFirveisqiounenOcf yRadio Frequency
Voice Frequency
VF
Very-low Frequency VLF
Low Frequency
LF
Medium Frequency
The Division Of Radio Frequency
Frequency 3-30Hz 30-300Hz
300-3000Hz 3-30KHz 30-300KHz 300-3000KHz 3-30MHz 30-300MHz 300-3000MHz 3-30GHz 30-300GHz
300-3000GHz
Customer
80s
90s
Year 2000 and Later
Different Requirement, Different Technology
Generation 1 in the 1980s Analog
Generation 2 in the 1990s Digital (l)
Generation 3 IMT-2000
Globally universal frequency band and standard, global seamless coverage
Highly effective spectrum efficiency Higher quality of service, security and reliability Easy to smoothly develop and transit from 2G, compatible
Accuracy: 50~200m Response time: 3~6s
Locating of a cell ID
Accuracy: depends on the size of a cell
Response time: within 3s
Location Services
110! Bandit!
with 2G in a reverse direction Providing multimedia services, with the rate of up to 2Mbps
– Vehicle environment: 144kbps – Environment for walk: 384kbps – Indoor environment: 2Mbps
User 1 User 2User 3
Frequency
Traffic channels on different frequency bands are allocated to different users,for example, AMPS and TACS
Objectives of 3G
• The system transfers to the nearest alarm processing center based on the location information of the user reporting an alarm.
• An alarm button can be set on a user’s mobile phone to achieve the goal of reporting an alarm without any conversation.
3G通訊的發展與應用趨勢 技術篇
Contents
Development of Mobile Communication Basic Concept of Mobile System GSM Network Architecture CDMA Network Architecture
Objectives
On completion of this section will be able to:
Understand the development of 3G
Name the concept of the three
different
multiple
access
technologies and understand where
cdma2000 RAKE
TD-SCDMA