phase modulation

简明释义

掂

英英释义

例句

1.In wireless communication, phase modulation 相位调制 is often used to improve signal integrity.

在无线通信中，相位调制 phase modulation 常用于提高信号完整性。

2.In radar systems, phase modulation 相位调制 helps in distinguishing between different targets.

在雷达系统中，相位调制 phase modulation 有助于区分不同的目标。

3.The advantage of phase modulation 相位调制 over amplitude modulation is its resistance to noise.

与幅度调制相比，相位调制 phase modulation 的优点是其对噪声的抵抗力。

4.Digital TV broadcasts commonly utilize phase modulation 相位调制 to transmit high-quality video and audio.

数字电视广播通常利用相位调制 phase modulation 来传输高质量的视频和音频。

5.The phase modulation 相位调制 technique allows for more efficient use of bandwidth.

这种相位调制 phase modulation 技术允许更有效地利用带宽。

作文

In the realm of telecommunications and signal processing, various techniques are employed to transmit information effectively. One such technique is phase modulation, which plays a crucial role in modern communication systems. Understanding phase modulation is essential for anyone interested in electronics and communication technology. This method involves varying the phase of a carrier signal in accordance with the information signal being sent. Unlike amplitude modulation, which alters the strength of the signal, or frequency modulation, which changes the frequency, phase modulation focuses solely on the phase angle of the wave. To grasp the concept of phase modulation, it is helpful to visualize a simple sine wave. Imagine a standard sine wave representing a carrier signal. In phase modulation, the position of this wave is shifted at specific intervals to encode information. For example, if we want to send a binary signal, we might shift the phase of the carrier wave by 180 degrees to represent a '1' and leave it unchanged to represent a '0'. This method allows for efficient transmission of data, particularly in digital communications.One of the significant advantages of phase modulation is its resilience to noise. Since the information is encoded in the phase of the signal rather than its amplitude, phase modulation can maintain the integrity of the transmitted data even in the presence of interference. This characteristic makes it particularly useful in environments where signal degradation is likely, such as in wireless communication systems. Additionally, phase modulation can be combined with other modulation techniques to enhance performance further. For instance, Quadrature Phase Shift Keying (QPSK) is a popular method that utilizes phase modulation to transmit two bits of information per symbol, effectively doubling the data rate compared to traditional binary phase shift keying.The implementation of phase modulation can be found in various applications, including satellite communication, mobile networks, and even in some forms of broadcasting. As technology advances, the demand for higher data rates and more reliable communication methods continues to grow. Phase modulation is at the forefront of these advancements, allowing for more efficient use of bandwidth and improved signal quality.In conclusion, phase modulation is a vital technique in the field of telecommunications. Its ability to encode information through phase shifts offers numerous benefits, especially in terms of noise resilience and bandwidth efficiency. As we continue to explore new technologies and improve existing ones, understanding phase modulation will remain essential for engineers and technicians alike. The future of communication heavily relies on our ability to harness the power of modulation techniques like phase modulation to meet the ever-increasing demands of data transmission and connectivity.

在电信和信号处理领域，采用各种技术有效地传输信息。其中一种技术是相位调制，它在现代通信系统中发挥着至关重要的作用。理解相位调制对于任何对电子和通信技术感兴趣的人来说都是必不可少的。这种方法涉及根据要发送的信息信号变化载波信号的相位。与幅度调制不同，幅度调制改变的是信号的强度，或频率调制改变的是频率，而相位调制则仅专注于波的相位角。为了理解相位调制的概念，想象一个标准的正弦波，代表载波信号。在相位调制中，这个波的位置在特定的间隔内被移动，以编码信息。例如，如果我们想发送一个二进制信号，我们可能会将载波波的相位移位180度来表示'1'，而不改变它来表示'0'。这种方法允许有效地传输数据，特别是在数字通信中。相位调制的一个显著优点是它对噪声的抵抗力。由于信息是通过信号的相位编码，而不是其幅度，因此即使在干扰存在的情况下，相位调制也能保持传输数据的完整性。这一特性使其在信号衰减可能发生的环境中特别有用，例如在无线通信系统中。此外，相位调制还可以与其他调制技术结合使用，以进一步提高性能。例如，四相相位键控（QPSK）是一种流行的方法，利用相位调制每个符号传输两个比特的信息，实际上将数据速率提高到传统二进制相位键控的两倍。相位调制的实施可以在各种应用中找到，包括卫星通信、移动网络，甚至某些形式的广播。随着技术的发展，对更高数据速率和更可靠通信方法的需求持续增长。相位调制处于这些进步的前沿，使得带宽的有效利用和信号质量的改善成为可能。总之，相位调制是电信领域的一项重要技术。它通过相位变化编码信息的能力提供了许多好处，尤其是在噪声抵抗力和带宽效率方面。随着我们继续探索新技术并改进现有技术，理解相位调制将仍然是工程师和技术人员的重要任务。通信的未来在很大程度上依赖于我们利用像相位调制这样的调制技术的能力，以满足不断增长的数据传输和连接需求。