demodulation

简明释义

英[diːˈmɒdjʊleɪʃən]美[diˌmɑːdʒəˈleɪʃən]

n. 检波；反调制；解调制

英英释义

单词用法

同义词

反义词

例句

1.Comparing to analog IQ demodulation, the advantage and application future of digital IQ demodulation are described in this paper.

对比模拟复解调，说明数字复解调的优越性以及它们的应用和发展前景。

2.The identification and demodulation of the communication signals are important parts in communication surveillance.

通信信号的识别与解调是通信侦察的重要组成部分。

3.One is called time-delay autocorrelation demodulation.

一种方法是时延自相关解调分析。

4.Modulation method and apparatus, demodulation method and apparatus, transmitting method and device.

调制方法与装置，解调方法与装置，传输方法与装置。

5.This paper chiefly introduces 4dpsk signals' modulation and demodulation.

本文主要介绍4dps K信号的调制与解调。

6.This thesis studied the modulation and demodulation technology of CDMA by comparing several technologies.

本文主要研究了CDMA技术中调制解调方法的选取与比较。

7.In digital communication, demodulation helps retrieve the original data from modulated signals.

在数字通信中，解调有助于从调制信号中检索原始数据。

8.The process of demodulation is essential for converting radio signals into audio sounds.

过程中的解调对将无线电信号转换为音频声音至关重要。

9.The quality of demodulation affects the clarity of the received audio signal.

解调的质量会影响接收到的音频信号的清晰度。

10.Understanding demodulation is critical for engineers working with wireless communication systems.

理解解调对于从事无线通信系统的工程师至关重要。

11.The receiver uses a demodulation technique to decode the transmitted information.

接收器使用解调技术来解码传输的信息。

作文

In the realm of telecommunications, the process of transferring information over distances has evolved significantly. One crucial aspect of this process is the concept of demodulation, which plays a vital role in ensuring that the transmitted signals are accurately interpreted by the receiving device. To understand demodulation, we must first delve into the basics of modulation, its counterpart. Modulation is the technique used to encode information onto a carrier wave, making it suitable for transmission over various media, such as radio waves or optical fibers. Without modulation, the original signal would be too weak or distorted to be effectively sent across long distances.When a signal reaches its destination, the next step is demodulation. This process involves extracting the original information from the modulated carrier wave. Essentially, demodulation reverses the modulation process, allowing the receiver to recover the transmitted data. This is particularly important in various communication systems, including radio broadcasting, television, and data transmission over the internet.There are several methods of demodulation, each suited for different types of modulation schemes. For instance, in amplitude modulation (AM), the strength of the carrier wave varies in accordance with the information signal. The demodulation of an AM signal typically involves using a diode detector, which rectifies the incoming signal and allows the original audio or data to be retrieved.In frequency modulation (FM), the frequency of the carrier wave changes based on the input signal. The demodulation process for FM signals often employs techniques such as phase-locked loops, which can accurately track the frequency changes and extract the original information.The importance of demodulation extends beyond just recovering audio or video signals. In digital communications, where data is transmitted in binary form, demodulation is equally critical. Techniques like quadrature amplitude modulation (QAM) combine multiple amplitude and phase variations to transmit more bits per symbol. The demodulation of QAM signals requires sophisticated algorithms that can differentiate between the various states of the signal, ensuring that the data is accurately reconstructed at the receiving end.Moreover, as technology advances, the methods and tools used for demodulation continue to improve. Software-defined radios (SDRs) exemplify this evolution, allowing users to change the demodulation techniques used by simply updating software, providing flexibility and adaptability in communication systems.In conclusion, demodulation is a fundamental process in telecommunications that ensures the effective recovery of information from modulated signals. It serves as the bridge between the transmitted data and its interpretation by the receiving device. As we continue to innovate and expand our communication technologies, the significance of demodulation will only grow, reinforcing its place as a cornerstone of modern telecommunications. Understanding demodulation not only enhances our grasp of communication systems but also prepares us for the future of information exchange in our increasingly interconnected world.

在电信领域，信息远距离传输的过程已经显著发展。其中一个关键方面是解调的概念，它在确保传输信号被接收设备准确解释方面发挥着重要作用。要理解解调，我们首先必须了解调制的基础知识，这是它的对立面。调制是将信息编码到载波波形上的技术，使其适合通过各种媒介（如无线电波或光纤）进行传输。如果没有调制，原始信号将太弱或失真，无法有效地跨越长距离。当信号到达目的地时，下一步就是解调。这个过程涉及从调制的载波波形中提取原始信息。基本上，解调逆转了调制过程，使接收方能够恢复传输的数据。这在各种通信系统中尤其重要，包括广播、电视和互联网数据传输。有几种解调的方法，每种方法适用于不同类型的调制方案。例如，在幅度调制（AM）中，载波波形的强度根据信息信号变化。AM信号的解调通常涉及使用二极管检测器，该检测器整流输入信号并允许恢复原始音频或数据。在频率调制（FM）中，载波波形的频率根据输入信号变化。FM信号的解调过程通常采用锁相环等技术，这些技术可以准确跟踪频率变化并提取原始信息。解调的重要性不仅限于恢复音频或视频信号。在数字通信中，数据以二进制形式传输，解调同样至关重要。像正交幅度调制（QAM）这样的技术结合了多种幅度和相位变化，以每个符号传输更多位。QAM信号的解调需要复杂的算法，能够区分信号的各种状态，确保在接收端准确重建数据。此外，随着技术的进步，用于解调的方法和工具也在不断改善。软件定义无线电（SDR）就是这种演变的典范，允许用户通过简单更新软件来更改所使用的解调技术，为通信系统提供灵活性和适应性。总之，解调是电信中的一个基本过程，确保从调制信号中有效恢复信息。它充当了传输数据与接收设备之间的桥梁。随着我们继续创新和扩展我们的通信技术，解调的重要性只会增加，巩固其作为现代电信基石的地位。理解解调不仅增强了我们对通信系统的理解，也为我们在日益互联的世界中准备了未来的信息交流。