amplitude modulated

简明释义

已调幅的

英英释义

例句

1.The amplitude modulated signal was stronger during the day than at night.

白天的调幅信号比夜间更强。

2.In aviation, pilots rely on amplitude modulated radio communications for clear instructions.

在航空领域，飞行员依赖于调幅无线电通信以获得清晰的指示。

3.The radio station broadcasts on an amplitude modulated frequency to reach a wider audience.

该电台以调幅频率广播，以覆盖更广泛的受众。

4.The sound quality of amplitude modulated transmissions can vary significantly due to interference.

由于干扰，调幅传输的音质可能会有显著变化。

5.Many older televisions used amplitude modulated signals for receiving channels.

许多老式电视使用调幅信号接收频道。

作文

In the realm of telecommunications, the concept of amplitude modulated signals plays a crucial role in how information is transmitted over various distances. Amplitude modulated (AM) refers to a technique used in electronic communication, most commonly for transmitting information via a radio carrier wave. The fundamental idea behind this method is relatively straightforward: by varying the amplitude of the carrier wave in accordance with the information signal, we can effectively encode and transmit data. This principle has been foundational in the development of radio broadcasting since the early 20th century.The process of amplitude modulated transmission begins with a carrier wave, which is a continuous wave that can be modulated in amplitude. When an audio signal or any other type of information is introduced, the amplitude of the carrier wave is altered to reflect the variations in the original signal. For example, when a person speaks into a microphone, their voice creates an audio signal that varies in amplitude and frequency. This audio signal is then used to modulate the amplitude of the carrier wave, creating an amplitude modulated signal that can be transmitted through the air.One of the key advantages of using amplitude modulated signals is their ability to cover vast distances. AM radio stations can broadcast signals that reach hundreds of miles, making them an effective means of communication in areas where other forms of transmission may be impractical. However, this long-range capability comes with its challenges. AM signals are more susceptible to interference from various environmental factors, such as electrical storms and physical obstructions. As a result, the quality of the received signal can vary significantly, leading to static or distortion during playback.Despite these challenges, amplitude modulated technology remains popular, particularly in the broadcasting of news, talk shows, and music. The simplicity of the AM transmission system allows for easy access, making it a reliable choice for many listeners. Furthermore, the equipment needed to receive AM signals is generally less complex and less expensive than that required for other modulation techniques, such as frequency modulation (FM).In recent years, advancements in technology have led to the emergence of digital broadcasting methods, which offer improved sound quality and reduced interference. However, amplitude modulated signals continue to hold a significant place in the world of radio. Many traditional AM stations still operate, serving communities that rely on this form of communication for local news and entertainment.In conclusion, understanding the principles behind amplitude modulated signals is essential for anyone interested in the field of telecommunications. This modulation technique has shaped the way we experience audio broadcasting and continues to be relevant today. While newer technologies may offer enhanced features, the legacy of amplitude modulated communication remains a testament to the ingenuity of early engineers and inventors who laid the groundwork for modern broadcasting. As we move forward, it is important to appreciate the role that amplitude modulated signals have played in connecting people and disseminating information across great distances, ensuring that voices can be heard even in the most remote locations.

在电信领域，幅度调制信号的概念在信息如何在各种距离上传输方面发挥着至关重要的作用。幅度调制（AM）是指在电子通信中使用的一种技术，最常用于通过无线电载波传输信息。这种方法的基本思想相对简单：通过根据信息信号变化载波的幅度，我们可以有效地编码和传输数据。这个原理自20世纪初以来一直是无线广播发展的基础。幅度调制传输的过程始于载波波形，它是一种连续波，可以在幅度上进行调制。当音频信号或任何其他类型的信息被引入时，载波的幅度会被改变，以反映原始信号的变化。例如，当一个人对着麦克风说话时，他们的声音会产生一个在幅度和频率上变化的音频信号。这个音频信号随后被用来调制载波的幅度，形成一个可以通过空气传输的幅度调制信号。使用幅度调制信号的一个主要优点是它们能够覆盖广泛的距离。AM广播电台可以发射覆盖数百英里的信号，使其成为在其他传输形式可能不切实际的地区进行通信的有效手段。然而，这种远程能力也带来了挑战。AM信号更容易受到各种环境因素的干扰，如电气风暴和物理障碍。因此，接收到的信号质量可能会显著变化，导致播放时出现静电或失真。尽管面临这些挑战，幅度调制技术仍然很受欢迎，特别是在新闻、脱口秀和音乐的广播中。AM传输系统的简单性使得其易于访问，成为许多听众的可靠选择。此外，接收AM信号所需的设备通常比其他调制技术（如频率调制（FM））所需的设备更简单、成本更低。近年来，技术的进步导致数字广播方法的出现，这些方法提供了更好的音质和减少的干扰。然而，幅度调制信号仍然在广播世界中占有重要地位。许多传统的AM电台仍在运营，为依赖这种通信形式提供地方新闻和娱乐的社区服务。总之，理解幅度调制信号背后的原理对于任何对电信领域感兴趣的人来说都是必不可少的。这种调制技术塑造了我们体验音频广播的方式，并在今天仍然具有相关性。虽然更新的技术可能提供增强的功能，但幅度调制通信的遗产仍然证明了早期工程师和发明家为现代广播奠定基础的创造力。随着我们向前发展，欣赏幅度调制信号在连接人们和传播信息方面所发挥的作用是重要的，确保声音即使在最偏远的地方也能被听见。