narrow band frequency modulation

简明释义

窄带档

英英释义

例句

1.The quality of audio transmission improved significantly with the adoption of narrow band frequency modulation.

采用窄带频率调制后，音频传输的质量显著提高。

2.The radio station uses narrow band frequency modulation to ensure a clear signal over long distances.

该电台使用窄带频率调制以确保信号在长距离内清晰。

3.To reduce interference, the engineers implemented narrow band frequency modulation in the new wireless devices.

为了减少干扰，工程师在新无线设备中实施了窄带频率调制。

4.In telecommunications, narrow band frequency modulation is often preferred for voice transmission.

在电信中，窄带频率调制通常更适用于语音传输。

5.The narrow band frequency modulation technique allows for efficient use of bandwidth in communication systems.

窄带频率调制技术允许在通信系统中有效利用带宽。

作文

In the realm of telecommunications and audio broadcasting, various modulation techniques are employed to transmit signals effectively. One such technique is narrow band frequency modulation, which plays a crucial role in ensuring that communication systems function smoothly and efficiently. Understanding this concept requires delving into the fundamentals of frequency modulation (FM) and its applications in real-world scenarios.Frequency modulation is a method of encoding information in a carrier wave by varying its frequency. This technique is widely used in radio broadcasting, where audio signals are transmitted over long distances. Within frequency modulation, there are two primary categories: wideband and narrowband. The distinction between these two types lies in the bandwidth they occupy. narrow band frequency modulation (窄带频率调制) specifically refers to a form of FM where the frequency deviation is relatively small, allowing for a more compact signal.The advantages of narrow band frequency modulation are significant, especially in situations where bandwidth is limited. For instance, in two-way radio communications, such as those used by emergency services or in aviation, using a narrow band allows for multiple channels to coexist without causing interference. This is particularly important in urban areas where the spectrum is crowded, and efficient use of available frequencies is essential.Another critical application of narrow band frequency modulation is in telemetry systems, where data from remote sensors must be transmitted back to a central location. Here, the narrowband approach ensures that the essential information can be sent with minimal power consumption, which is vital for battery-operated devices. The reduced bandwidth also means that the signal can be less susceptible to noise and interference, providing clearer communication.Moreover, the technical implementation of narrow band frequency modulation involves specific equipment and protocols. Modulators and demodulators designed for narrowband FM are engineered to maintain the integrity of the signal while minimizing distortion. This precision is crucial, as any loss of data can lead to miscommunication, especially in critical fields such as healthcare and public safety.Despite its advantages, narrow band frequency modulation does have limitations. The smaller frequency deviation means that the amount of information transmitted per unit time is lower compared to wideband FM. Therefore, while it is ideal for voice communications and telemetry, it may not be suitable for high-fidelity audio transmission, where a broader bandwidth is necessary to capture the full range of sound.In conclusion, narrow band frequency modulation is a vital technique within the field of telecommunications. Its ability to efficiently utilize limited bandwidth makes it indispensable in various applications, from emergency communications to telemetry systems. As technology continues to evolve, the principles of narrow band frequency modulation will remain relevant, adapting to meet the demands of modern communication needs. Understanding this modulation technique not only enhances our grasp of telecommunications but also highlights the intricate balance between efficiency and quality in signal transmission.

在电信和音频广播领域，采用多种调制技术有效地传输信号。其中一种技术是窄带频率调制，它在确保通信系统顺利高效运行方面发挥着至关重要的作用。理解这一概念需要深入了解频率调制（FM）的基本原理及其在现实世界中的应用。频率调制是一种通过改变载波波的频率来编码信息的方法。这种技术在无线电广播中被广泛使用，音频信号通过长距离传播。在频率调制中，有两种主要类别：宽带和窄带。两者之间的区别在于它们占用的带宽。窄带频率调制（narrow band frequency modulation）特别指的是一种FM形式，其频率偏差相对较小，从而允许更紧凑的信号。窄带频率调制的优点显著，尤其是在带宽有限的情况下。例如，在双向无线电通信中，如紧急服务或航空业所使用的，使用窄带可以让多个频道共存而不会造成干扰。这在城市地区尤为重要，因为频谱拥挤，有效利用可用频率至关重要。窄带频率调制的另一个关键应用是在遥测系统中，其中远程传感器的数据必须传输回中心位置。在这里，窄带方法确保以最低的功耗发送必要的信息，这对电池供电的设备至关重要。减少的带宽也意味着信号更不易受到噪声和干扰的影响，从而提供更清晰的通信。此外，窄带频率调制的技术实现涉及特定的设备和协议。为窄带FM设计的调制解调器旨在保持信号的完整性，同时最小化失真。这种精确性至关重要，因为任何数据丢失都可能导致误通信，尤其是在医疗和公共安全等关键领域。尽管有其优势，窄带频率调制也有局限性。较小的频率偏差意味着每单位时间传输的信息量低于宽带FM。因此，尽管它非常适合语音通信和遥测，但对于高保真音频传输可能不太合适，因为需要更宽的带宽来捕捉声音的全范围。总之，窄带频率调制是电信领域中的一种重要技术。它有效利用有限带宽的能力使其在各种应用中不可或缺，从应急通信到遥测系统。随着技术的不断发展，窄带频率调制的原理将继续相关，适应现代通信需求的挑战。理解这种调制技术不仅增强了我们对电信的理解，也突显了信号传输中效率与质量之间的微妙平衡。