double sideband transmission

简明释义

双边带传输

英英释义

例句

1.In radio communications, double sideband transmission is commonly used to transmit audio signals effectively.

在无线电通信中，双边带传输通常用于有效地传输音频信号。

2.Many AM radios rely on double sideband transmission to receive clear signals from distant stations.

许多AM收音机依赖于双边带传输从远处电台接收清晰信号。

3.During the experiment, we measured the efficiency of double sideband transmission in various frequency bands.

在实验中，我们测量了不同频段下的双边带传输效率。

4.The engineer explained that double sideband transmission allows for better utilization of bandwidth compared to single sideband.

工程师解释说，双边带传输相比单边带更好地利用了带宽。

5.The choice of double sideband transmission was crucial for the successful implementation of the communication system.

选择双边带传输对于通信系统的成功实施至关重要。

作文

In the world of telecommunications, efficient transmission of information is crucial. One of the fundamental techniques used in this field is known as double sideband transmission. This method allows for the effective transfer of signals, particularly in amplitude modulation (AM) broadcasting. To better understand what double sideband transmission means, we must first explore its basic principles and applications.Double sideband transmission refers to a technique where a carrier wave is modulated by an audio or data signal, resulting in two sidebands: the upper sideband (USB) and the lower sideband (LSB). These sidebands carry the same information, but they are located on either side of the carrier frequency. This means that when a signal is transmitted, both sidebands are sent simultaneously. The presence of both sidebands helps to improve the quality and fidelity of the received signal.One of the primary advantages of double sideband transmission is its efficiency in utilizing bandwidth. By transmitting both sidebands, the system can effectively convey more information without needing additional bandwidth. This is particularly beneficial in radio communications, where bandwidth is often limited. Moreover, the redundancy provided by the two sidebands ensures that if one sideband experiences interference or degradation, the other can still provide a clear signal, enhancing the overall reliability of the communication.However, double sideband transmission is not without its drawbacks. One significant disadvantage is that it requires more power compared to single sideband transmission (SSB), which only transmits one of the sidebands. This higher power requirement can lead to increased operational costs and reduced battery life in portable devices. Additionally, the need for demodulation of both sidebands can complicate the receiver design, making it less efficient than systems that utilize SSB.Despite these challenges, double sideband transmission remains widely used in various applications. For instance, traditional AM radio stations utilize this technique to broadcast music and talk shows to millions of listeners. The ability to transmit over long distances with relatively low power makes it an attractive option for radio broadcasters. Furthermore, double sideband transmission is also employed in certain types of data communication, such as in some forms of digital modulation schemes.As technology continues to advance, the relevance of double sideband transmission may evolve. Newer methods of signal processing and modulation, such as single sideband and quadrature amplitude modulation (QAM), offer alternatives that can be more efficient under certain conditions. Nonetheless, understanding double sideband transmission is essential for anyone interested in the fundamentals of telecommunications and radio broadcasting.In conclusion, double sideband transmission is a significant technique in the field of telecommunications that has stood the test of time. Its ability to transmit information efficiently through the use of both sidebands makes it a valuable tool for radio communications. While it has some limitations, its practical applications in AM broadcasting and data transmission highlight its importance in the ongoing development of communication technologies. As we move forward, it will be interesting to see how double sideband transmission continues to be utilized and adapted in an ever-changing technological landscape.

在电信领域，有效的信息传输至关重要。该领域使用的一种基本技术被称为双边带传输。这种方法允许有效地传输信号，特别是在调幅（AM）广播中。为了更好地理解双边带传输的含义，我们必须首先探讨其基本原理和应用。双边带传输是指一种技术，其中载波波形被音频或数据信号调制，产生两个边带：上边带（USB）和下边带（LSB）。这些边带携带相同的信息，但位于载波频率的两侧。这意味着当信号被传输时，两个边带同时发送。两个边带的存在有助于提高接收信号的质量和保真度。双边带传输的主要优点之一是其在带宽利用方面的效率。通过同时传输两个边带，系统可以有效地传达更多信息而无需额外的带宽。这在无线电通信中尤其有利，因为带宽通常有限。此外，两个边带提供的冗余确保如果一个边带经历干扰或退化，另一个仍然可以提供清晰的信号，从而增强通信的整体可靠性。然而，双边带传输并非没有缺点。一个显著的缺点是与单边带传输（SSB）相比，它需要更多的功率，后者只传输一个边带。这种更高的功率需求可能导致运营成本增加，并减少便携设备的电池寿命。此外，两个边带的解调需求可能使接收器设计复杂化，使其效率低于使用SSB的系统。尽管面临这些挑战，双边带传输仍然广泛应用于各种应用中。例如，传统的AM广播电台利用这一技术向数百万听众广播音乐和脱口秀。以相对较低的功率进行远距离传输的能力使其成为广播电台的一个有吸引力的选择。此外，双边带传输也用于某些类型的数据通信，例如某些形式的数字调制方案。随着技术的不断进步，双边带传输的相关性可能会演变。信号处理和调制的新方法，如单边带和正交振幅调制（QAM），提供了在某些条件下可能更高效的替代方案。尽管如此，理解双边带传输对于任何对电信和广播基础知识感兴趣的人来说都是必不可少的。总之，双边带传输是电信领域的一项重要技术，经过时间的考验。它通过使用两个边带有效地传输信息，使其成为无线电通信的宝贵工具。尽管存在一些局限性，但其在AM广播和数据传输中的实际应用突显了其在通信技术持续发展中的重要性。随着我们向前迈进，观察双边带传输在不断变化的技术环境中如何继续被利用和适应，将是非常有趣的。