carrier frequency

简明释义

载频

英英释义

例句

1.When designing a new communication system, engineers must choose an appropriate carrier frequency 载波频率 to avoid interference.

在设计新的通信系统时，工程师必须选择合适的载波频率以避免干扰。

2.In FM radio, the audio signal modulates the carrier frequency 载波频率 to create sound waves.

在调频广播中，音频信号调制载波频率以产生声波。

3.The carrier frequency 载波频率 determines the bandwidth available for data transmission in a wireless network.

在无线网络中，载波频率决定了可用于数据传输的带宽。

4.In radio communications, the signal is modulated onto a specific carrier frequency 载波频率 to enable transmission over long distances.

在无线通信中，信号被调制到特定的载波频率上，以便能够远距离传输。

5.The carrier frequency 载波频率 of the satellite signal is crucial for accurate reception by ground stations.

卫星信号的载波频率对地面站的准确接收至关重要。

作文

In the realm of telecommunications and signal processing, the term carrier frequency refers to a specific frequency that is used to carry information in the form of a modulated wave. This concept is fundamental to various forms of communication, including radio broadcasting, television transmission, and mobile phone signals. The carrier frequency acts as a base signal that can be modulated by different types of information, such as audio or video signals, allowing for effective transmission over long distances.To understand the importance of carrier frequency, it is essential to delve into the basics of modulation. Modulation is the process of varying one or more properties of a periodic waveform, known as the carrier wave, with respect to the information signal that is being sent. This can include amplitude modulation (AM), frequency modulation (FM), or phase modulation (PM). Each type of modulation alters the carrier frequency in a unique way, enabling the transmission of various types of data.For instance, in AM radio broadcasting, the audio signal is superimposed onto a high-frequency carrier frequency, which allows it to be transmitted over vast distances. The receiver then demodulates the signal, extracting the original audio information from the carrier frequency. Similarly, FM radio uses frequency variations to encode sound information, resulting in improved sound quality and resistance to interference compared to AM.The choice of carrier frequency is crucial for effective communication. Different frequencies have different propagation characteristics. For example, lower frequencies tend to travel further and penetrate obstacles better, while higher frequencies provide greater bandwidth and are capable of carrying more information. This is why certain bands of frequencies are allocated for specific purposes, such as commercial radio, emergency services, and aviation communications.Moreover, the concept of carrier frequency extends beyond traditional radio and television broadcasting. In modern digital communication systems, such as those used in Wi-Fi and cellular networks, multiple carrier frequencies are employed simultaneously to increase the amount of data that can be transmitted. Techniques like Orthogonal Frequency-Division Multiplexing (OFDM) utilize multiple closely spaced carrier frequencies to allow for efficient data transmission, significantly enhancing the capacity of communication channels.In conclusion, the term carrier frequency is a cornerstone of modern communication technology. Its role in modulation and signal transmission is vital for the effective delivery of audio, video, and data across various platforms. Understanding the intricacies of carrier frequency not only provides insight into the workings of telecommunications but also highlights the continuous advancements in technology that enable us to connect and communicate in our increasingly digital world. As we move forward, the evolution of carrier frequency and its applications will undoubtedly play a significant role in shaping the future of global communication.

在电信和信号处理领域，术语载波频率指的是用于以调制波的形式传输信息的特定频率。这个概念对于各种通信形式至关重要，包括广播、电视传输和手机信号。载波频率作为一个基准信号，可以通过不同类型的信息（如音频或视频信号）进行调制，从而实现远距离的有效传输。要理解载波频率的重要性，首先需要深入了解调制的基本原理。调制是指根据要发送的信息信号变化周期波形（即载波波）的一个或多个属性的过程。这可以包括幅度调制（AM）、频率调制（FM）或相位调制（PM）。每种调制类型以独特的方式改变载波频率，使得各种数据能够传输。例如，在AM广播中，音频信号叠加在高频载波频率上，这使得它能够在广阔的距离上传输。接收器然后对信号进行解调，从载波频率中提取出原始音频信息。类似地，FM广播使用频率变化来编码声音信息，从而提供比AM更好的音质和抗干扰能力。载波频率的选择对于有效通信至关重要。不同的频率具有不同的传播特性。例如，较低的频率往往能够传播更远并更好地穿透障碍物，而较高的频率则提供更大的带宽，并能承载更多信息。这就是为什么某些频段的频率被分配用于特定目的，如商业广播、紧急服务和航空通信。此外，载波频率的概念超越了传统的广播和电视。现代数字通信系统（如Wi-Fi和蜂窝网络）同时使用多个载波频率来增加可以传输的数据量。正交频分复用（OFDM）等技术利用多个紧密间隔的载波频率来实现高效的数据传输，显著提高通信通道的容量。总之，术语载波频率是现代通信技术的基石。它在调制和信号传输中的作用对于音频、视频和数据在各种平台上的有效传递至关重要。理解载波频率的复杂性不仅提供了对电信工作原理的洞察，还突显了技术不断进步的过程，使我们能够在日益数字化的世界中连接和交流。随着我们向前发展，载波频率及其应用的演变无疑将在塑造全球通信的未来中发挥重要作用。