double-sideband suppressed-carrier modulation

简明释义

抑制载波的双边带调制

英英释义

例句

1.In radio communications, double-sideband suppressed-carrier modulation is often used to improve bandwidth efficiency.

在无线通信中，双边带抑制载波调制常用于提高带宽效率。

2.The double-sideband suppressed-carrier modulation technique is particularly effective in reducing interference.

该双边带抑制载波调制技术在减少干扰方面特别有效。

3.In amateur radio, many operators utilize double-sideband suppressed-carrier modulation for better audio quality.

在业余无线电中，许多操作员利用双边带抑制载波调制来获得更好的音频质量。

4.Engineers prefer double-sideband suppressed-carrier modulation for its ability to reduce power consumption in communication systems.

工程师们偏爱双边带抑制载波调制，因为它能够降低通信系统中的功耗。

5.The use of double-sideband suppressed-carrier modulation allows for clearer signal transmission over long distances.

使用双边带抑制载波调制可以在长距离传输中实现更清晰的信号。

作文

In the field of telecommunications, modulation techniques play a crucial role in the transmission of information. One such technique is double-sideband suppressed-carrier modulation, which is often abbreviated as DSBSC. This method is particularly important for efficient communication systems, as it allows for the effective use of bandwidth while minimizing power consumption. To understand the significance of double-sideband suppressed-carrier modulation (双边带抑制载波调制), we must first delve into the basics of modulation and its applications.Modulation is the process of varying a carrier signal in order to transmit information. In traditional amplitude modulation (AM), the carrier signal's amplitude is varied in accordance with the information signal. However, this approach can be inefficient, as it requires a significant amount of power to maintain the carrier signal, which does not carry any information itself. This is where double-sideband suppressed-carrier modulation comes into play. By suppressing the carrier component, DSBSC reduces the overall power requirement while still allowing for the transmission of the information signal.The key feature of double-sideband suppressed-carrier modulation is that it transmits two sidebands, which contain the same information but are mirrored around the carrier frequency. This means that both the upper sideband (USB) and lower sideband (LSB) are preserved, while the carrier signal is eliminated. The result is a more efficient use of the available bandwidth, as the energy that would have been used to transmit the carrier can instead be allocated to the sidebands.One of the primary applications of double-sideband suppressed-carrier modulation is in single-sideband (SSB) modulation, which is widely used in radio communications. SSB is a refinement of DSBSC that further eliminates one of the sidebands, leading to even greater efficiency. However, DSBSC is still valuable in scenarios where SSB is not practical or where the receiver design is simpler. For instance, DSBSC can be used in television broadcasting, where the quality of the transmitted signal is paramount.Another advantage of double-sideband suppressed-carrier modulation is its resistance to noise. Since the carrier is suppressed, any noise that may affect the transmission is less likely to interfere with the information being sent. This is particularly beneficial in environments where signal degradation is common, such as in urban areas with many competing signals.Despite its advantages, double-sideband suppressed-carrier modulation does have some drawbacks. One of the main challenges is the complexity of the demodulation process. Because the carrier is not transmitted, the receiver must employ specific techniques to recover the original signal. This can complicate the design of receivers and increase costs.In conclusion, double-sideband suppressed-carrier modulation (双边带抑制载波调制) is a vital technique in modern telecommunications. By suppressing the carrier signal and transmitting only the sidebands, it offers a more efficient way to communicate information over various media. While it may present some challenges in terms of receiver design, the benefits of reduced power consumption and improved noise resistance make it a popular choice in many applications. As technology continues to evolve, understanding and mastering techniques like double-sideband suppressed-carrier modulation will remain essential for engineers and professionals in the field of communication.

在电信领域，调制技术在信息传输中发挥着至关重要的作用。其中一种技术是双边带抑制载波调制，通常缩写为DSBSC。这种方法对于高效通信系统尤为重要，因为它允许有效利用带宽，同时减少功耗。要理解双边带抑制载波调制（double-sideband suppressed-carrier modulation）的意义，我们必须首先深入了解调制的基础知识及其应用。调制是改变载波信号以传输信息的过程。在传统的幅度调制（AM）中，载波信号的幅度根据信息信号变化。然而，这种方法可能效率低下，因为它需要大量能量来保持载波信号，而载波信号本身并不携带任何信息。这就是双边带抑制载波调制发挥作用的地方。通过抑制载波分量，DSBSC减少了整体功率需求，同时仍然允许信息信号的传输。双边带抑制载波调制的一个主要特征是它传输两个边带，这两个边带围绕载波频率镜像，包含相同的信息。这意味着上边带（USB）和下边带（LSB）都被保留，而载波信号被消除。结果是更有效地利用可用带宽，因为本应用于传输载波的能量可以转而分配给边带。双边带抑制载波调制的主要应用之一是在单边带（SSB）调制中，SSB在无线电通信中被广泛使用。SSB是DSBSC的一种改进，进一步消除了一个边带，从而实现更高的效率。然而，DSBSC在SSB不切实际或接收机设计较简单的情况下仍然非常有价值。例如，DSBSC可以用于电视广播，其中传输信号的质量至关重要。双边带抑制载波调制的另一个优点是其抗噪声能力。由于载波被抑制，因此可能影响传输的任何噪声不太可能干扰正在发送的信息。这在信号衰减普遍存在的环境中尤为有利，例如在竞争信号众多的城市地区。尽管有其优势，双边带抑制载波调制确实存在一些缺点。主要挑战之一是解调过程的复杂性。由于不传输载波，接收机必须采用特定技术来恢复原始信号。这可能使接收机的设计变得复杂，并增加成本。总之，双边带抑制载波调制（double-sideband suppressed-carrier modulation）是现代电信中的一项重要技术。通过抑制载波信号并仅传输边带，它提供了一种更高效的方式来通过各种媒体传递信息。尽管在接收机设计方面可能面临一些挑战，但降低功耗和提高抗噪声能力的好处使其在许多应用中成为热门选择。随着技术的不断发展，理解和掌握像双边带抑制载波调制这样的技术将对通信领域的工程师和专业人士至关重要。