side band

简明释义

边频带

英英释义

例句

1.In amateur radio, operators often use side band 边带 for long-distance communication.

在业余无线电中，操作员通常使用 边带 side band 进行远程通信。

2.The scientist studied the effects of side band 边带 noise on signal processing.

科学家研究了 边带 side band 噪声对信号处理的影响。

3.The radio technician explained how the side band 边带 modulation improves signal clarity.

无线电技术员解释了如何通过 边带 side band 调制来提高信号清晰度。

4.Using side band 边带 transmission allows for more efficient use of bandwidth.

使用 边带 side band 传输可以更有效地利用带宽。

5.The side band 边带 frequencies can be adjusted to avoid interference with other signals.

可以调整 边带 side band 频率以避免与其他信号干扰。

作文

In the world of telecommunications and radio frequency communication, the term side band refers to the additional frequencies that are generated alongside the main carrier frequency when a signal is modulated. Understanding the concept of side band is crucial for anyone interested in the fields of radio broadcasting, amateur radio, or even modern wireless communication technologies. When a radio wave is transmitted, it usually consists of a single frequency known as the carrier frequency. However, when information such as voice or data is superimposed onto this carrier wave through a process called modulation, it produces additional frequencies. These additional frequencies are known as side bands. There are typically two types of side bands: upper and lower. The upper side band contains frequencies that are higher than the carrier frequency, while the lower side band contains frequencies that are lower. The significance of side bands can be seen in various applications. For instance, in amplitude modulation (AM) broadcasting, both the upper and lower side bands carry the same information. This means that if a receiver is tuned to the carrier frequency, it can demodulate the signal and extract the information from either side band. This redundancy is beneficial because it allows for better reception under varying conditions. Moreover, in single sideband (SSB) modulation, which is commonly used in amateur radio and marine communication, only one of the side bands is transmitted, along with the carrier being suppressed. This results in a more efficient use of bandwidth and power, making SSB a preferred method for long-distance communication. By eliminating one side band, operators can achieve clearer signals over greater distances. Understanding side bands also plays a critical role in spectrum management. Regulatory bodies allocate specific frequency ranges for different services, and knowing how side bands operate helps prevent interference between different communication systems. For example, if one station is transmitting on a particular frequency, its side bands could potentially interfere with other nearby frequencies. Therefore, engineers must consider side bands when designing communication systems to ensure that they comply with regulations and operate effectively without causing disruption. In conclusion, the concept of side band is fundamental in understanding radio communications. It encompasses the additional frequencies created during modulation and has significant implications for broadcasting, communication efficiency, and spectrum management. As technology continues to evolve, the principles surrounding side bands will remain relevant, paving the way for advancements in how we transmit and receive information across various platforms. Whether you are a radio enthusiast, an engineer, or simply curious about how communication works, grasping the idea of side bands is essential for a deeper appreciation of the complexities involved in modern telecommunications.

在电信和无线电频率通信的世界中，术语侧带指的是在信号调制时与主载波频率一起生成的附加频率。理解侧带的概念对于任何对广播、业余无线电或现代无线通信技术感兴趣的人来说都是至关重要的。当无线电波被传输时，它通常由一个称为载波频率的单一频率组成。然而，当声音或数据等信息通过调制过程叠加到这个载波波上时，会产生附加的频率。这些附加的频率被称为侧带。通常有两种类型的侧带：上侧带和下侧带。上侧带包含高于载波频率的频率，而下侧带包含低于载波频率的频率。侧带的重要性可以在各种应用中看到。例如，在幅度调制（AM）广播中，上下侧带都携带相同的信息。这意味着，如果接收器调谐到载波频率，它可以解调信号并从任一侧带中提取信息。这种冗余是有益的，因为它允许在不同条件下获得更好的接收。此外，在单侧带（SSB）调制中，这在业余无线电和海洋通信中常用，仅传输一个侧带，同时抑制载波。这导致带宽和功率的更有效利用，使得SSB成为长距离通信的首选方法。通过消除一个侧带，操作员可以在更远的距离上实现更清晰的信号。理解侧带在频谱管理中也起着关键作用。监管机构为不同的服务分配特定的频率范围，了解侧带的工作原理有助于防止不同通信系统之间的干扰。例如，如果一个站点在特定频率上进行传输，其侧带可能会干扰附近的其他频率。因此，工程师在设计通信系统时必须考虑侧带，以确保它们符合规定并有效运行而不造成干扰。总之，侧带的概念在理解无线电通信中是基本的。它包括调制过程中产生的附加频率，对广播、通信效率和频谱管理具有重要影响。随着技术的不断发展，围绕侧带的原则将仍然相关，为我们在各种平台上传输和接收信息的方式的进步铺平道路。无论你是无线电爱好者、工程师，还是仅仅对通信如何运作感到好奇，掌握侧带的概念对于更深入地欣赏现代电信中涉及的复杂性至关重要。