frequency and amplitude modulation

简明释义

调频与调幅

英英释义

例句

1.The study of frequency and amplitude modulation is a key part of modern communication engineering courses.

对频率和幅度调制的研究是现代通信工程课程的关键部分。

2.The concept of frequency and amplitude modulation is crucial in understanding how FM and AM radios work.

理解FM和AM收音机如何工作的概念中，频率和幅度调制是至关重要的。

3.In radio broadcasting, frequency and amplitude modulation is essential for transmitting clear signals.

在广播中，频率和幅度调制对于传输清晰信号至关重要。

4.In telecommunications, frequency and amplitude modulation helps in reducing interference during transmission.

在电信中，频率和幅度调制有助于在传输过程中减少干扰。

5.Engineers often use frequency and amplitude modulation techniques to enhance sound quality in audio systems.

工程师们常常使用频率和幅度调制技术来提高音响系统的音质。

作文

In the realm of communication technology, frequency and amplitude modulation play a vital role in the transmission of information. These two techniques are fundamental to how we send and receive signals over various media, including radio waves and digital platforms. To understand their significance, it is essential to delve into what frequency and amplitude modulation entail and how they function in practical applications.Firstly, let’s define frequency and amplitude modulation. Frequency modulation (FM) involves varying the frequency of a carrier wave in accordance with the information signal being sent. This method allows for a more robust transmission, especially in environments with high levels of noise. On the other hand, amplitude modulation (AM) changes the amplitude of the carrier wave to convey information. While AM is simpler and requires less bandwidth, it is more susceptible to interference, making FM the preferred choice for many modern applications.The significance of frequency and amplitude modulation can be observed in various fields, particularly in broadcasting. For instance, FM radio stations utilize frequency and amplitude modulation to provide high-quality audio signals. The clarity and depth of sound that FM offers are largely due to its ability to resist interference from other signals. This is why FM radio has become a staple in everyday life, providing music, news, and entertainment to millions.Moreover, frequency and amplitude modulation are not limited to just audio broadcasting. They also play a crucial role in television transmission. In analog television systems, video signals were transmitted using AM, while audio signals used FM. This combination allowed viewers to enjoy synchronized sound and picture quality. Although digital broadcasting has largely replaced analog methods, the principles of frequency and amplitude modulation remain foundational in understanding how these technologies evolved.In addition to broadcasting, frequency and amplitude modulation are instrumental in telecommunications. Mobile phones, for example, rely on these techniques to transmit voice and data over cellular networks. The modulation schemes used in mobile communications ensure that signals can travel long distances without losing quality, thus enabling seamless connectivity in our increasingly digital world.Furthermore, the advancements in technology have led to the development of more sophisticated modulation techniques derived from frequency and amplitude modulation. Digital modulation schemes, such as Quadrature Amplitude Modulation (QAM), combine both frequency and amplitude variations to enhance data transmission rates. These innovations highlight the ongoing importance of understanding frequency and amplitude modulation as they form the basis for more complex systems that cater to modern demands.In conclusion, frequency and amplitude modulation are essential concepts in communication technology. Their applications in broadcasting, telecommunications, and beyond illustrate their significance in our daily lives. As we continue to advance technologically, the fundamentals of frequency and amplitude modulation will remain relevant, shaping the future of how we communicate and share information. Understanding these concepts is not only beneficial for professionals in the field but also for anyone interested in the mechanics behind the devices and services we use every day.

在通信技术领域，频率和幅度调制在信息传输中发挥着至关重要的作用。这两种技术是我们如何通过各种媒介（包括无线电波和数字平台）发送和接收信号的基础。要理解它们的重要性，有必要深入了解频率和幅度调制的含义及其在实际应用中的功能。首先，让我们定义一下频率和幅度调制。频率调制（FM）涉及根据所发送的信息信号改变载波的频率。这种方法允许更强大的传输，尤其是在高噪声环境中。而幅度调制（AM）则通过改变载波的幅度来传达信息。虽然AM更简单且所需带宽较少，但它对干扰的敏感性更高，因此FM成为许多现代应用的首选。频率和幅度调制的重要性可以在多个领域观察到，特别是在广播中。例如，FM电台利用频率和幅度调制提供高质量的音频信号。FM所提供的声音清晰度和深度在很大程度上归功于其抵抗其他信号干扰的能力。这就是为什么FM广播已成为日常生活的一个重要组成部分，为数百万听众提供音乐、新闻和娱乐。此外，频率和幅度调制不仅限于音频广播。它们在电视传输中也发挥着关键作用。在模拟电视系统中，视频信号使用AM进行传输，而音频信号则使用FM。这种组合使观众能够享受同步的声音和图像质量。尽管数字广播在很大程度上取代了模拟方法，但理解频率和幅度调制的原理仍然是理解这些技术如何发展的基础。除了广播，频率和幅度调制在电信中也至关重要。例如，手机依赖这些技术在蜂窝网络上传输语音和数据。移动通信中使用的调制方案确保信号能够在长距离内传输而不会失去质量，从而使我们在日益数字化的世界中实现无缝连接。此外，技术的进步导致了从频率和幅度调制衍生出的更复杂的调制技术的发展。数字调制方案，如正交幅度调制（QAM），结合了频率和幅度的变化，以增强数据传输速率。这些创新突显了理解频率和幅度调制的重要性，因为它们构成了更复杂系统的基础，以满足现代需求。总之，频率和幅度调制是通信技术中的基本概念。它们在广播、电信等领域的应用说明了它们在我们日常生活中的重要性。随着我们继续在技术上取得进展，频率和幅度调制的基础知识将继续保持相关性，塑造我们交流和分享信息的未来。理解这些概念不仅对该领域的专业人士有益，也对任何对我们每天使用的设备和服务背后的机制感兴趣的人有帮助。