adjacent channel selectivity

简明释义

相邻信道选择性

英英释义

例句

1.To avoid signal degradation, we must improve the adjacent channel selectivity of our antennas.

为了避免信号衰减，我们必须提高天线的邻频道选择性。

2.Engineers are focusing on enhancing adjacent channel selectivity in mobile devices for clearer calls.

工程师们正专注于提高移动设备的邻频道选择性，以获得更清晰的通话质量。

3.In crowded urban areas, adjacent channel selectivity becomes crucial for maintaining signal integrity.

在拥挤的城市地区，邻频道选择性对于保持信号完整性变得至关重要。

4.The new radio receiver boasts improved adjacent channel selectivity to minimize interference from nearby frequencies.

这款新的收音机具有更好的邻频道选择性，以减少来自附近频率的干扰。

5.The performance of the communication system heavily relies on its adjacent channel selectivity.

通信系统的性能在很大程度上依赖于其邻频道选择性。

作文

In the realm of telecommunications, one of the critical concepts that engineers and designers must grasp is adjacent channel selectivity. This term refers to the ability of a receiver to isolate and effectively process signals from its intended frequency while minimizing interference from nearby channels. As wireless communication systems proliferate, the importance of adjacent channel selectivity becomes increasingly pronounced. Without adequate selectivity, a receiver may inadvertently pick up signals from adjacent channels, leading to degraded performance and unreliable communication.To understand the significance of adjacent channel selectivity, consider a practical example. Imagine a radio station broadcasting at a particular frequency, say 100.5 MHz. If another station operates at 100.3 MHz or 100.7 MHz, the receiver tuned to 100.5 MHz must possess sufficient adjacent channel selectivity to filter out these nearby frequencies. Failure to do so could result in a muddled audio experience for the listener, with overlapping signals causing distortion and confusion.The technical foundation of adjacent channel selectivity lies in the design of filters within the receiver. These filters are engineered to allow signals from the desired frequency to pass through while attenuating those from adjacent frequencies. The effectiveness of these filters is measured in decibels (dB), and a higher dB value indicates better selectivity. For instance, a receiver with an adjacent channel selectivity of 60 dB would significantly reduce the power of signals from neighboring channels, ensuring clearer reception of the intended signal.Moreover, the rise of digital communication has further emphasized the need for robust adjacent channel selectivity. In digital systems, multiple signals can occupy the same bandwidth through techniques like frequency division multiplexing (FDM). Here, the ability to distinguish between closely spaced channels becomes paramount. Poor selectivity can lead to data loss and increased error rates, undermining the reliability of the communication system.In addition to its technical implications, adjacent channel selectivity also has regulatory and operational consequences. Telecommunications authorities often set standards for selectivity to ensure fair use of the spectrum and minimize interference among users. Compliance with these standards is essential for service providers to maintain their licenses and operate efficiently.As we look toward the future, advancements in technology continue to enhance adjacent channel selectivity. Innovations in software-defined radios (SDRs) and adaptive filtering techniques promise to improve the capability of receivers to handle adjacent channel interference dynamically. This evolution will enable more efficient use of the radio spectrum, accommodating the ever-increasing demand for wireless services.In conclusion, adjacent channel selectivity is a fundamental concept in telecommunications that plays a vital role in ensuring effective communication. Its significance is evident in both analog and digital systems, where the ability to filter out unwanted signals directly impacts the quality of service. As technology advances, the importance of maintaining high levels of adjacent channel selectivity will only grow, highlighting the need for ongoing research and development in this critical area of wireless communication.

在电信领域，工程师和设计师必须掌握的一个关键概念是邻道选择性。这个术语指的是接收器隔离并有效处理其预定频率信号的能力，同时最小化来自附近频道的干扰。随着无线通信系统的普及，邻道选择性的重要性愈发明显。如果没有足够的选择性，接收器可能会无意中接收到来自邻近频道的信号，从而导致性能下降和通信不可靠。为了理解邻道选择性的意义，可以考虑一个实际的例子。想象一个广播电台在特定频率上播出，比如100.5 MHz。如果另一个电台在100.3 MHz或100.7 MHz上运行，则调谐到100.5 MHz的接收器必须具备足够的邻道选择性来过滤掉这些附近的频率。如果未能做到这一点，可能会导致听众的音频体验模糊，重叠的信号造成失真和混淆。邻道选择性的技术基础在于接收器内部滤波器的设计。这些滤波器被设计成允许所需频率的信号通过，同时衰减来自相邻频率的信号。这些滤波器的有效性以分贝（dB）为单位进行测量，较高的dB值表示更好的选择性。例如，具有60 dB的邻道选择性的接收器将显著降低来自邻近频道的信号功率，从而确保所需信号的更清晰接收。此外，数字通信的兴起进一步强调了强大邻道选择性的必要性。在数字系统中，通过频分复用（FDM）等技术，多个信号可以占用相同的带宽。在这里，区分紧密间隔频道的能力变得至关重要。选择性差可能导致数据丢失和错误率增加，削弱通信系统的可靠性。除了技术影响外，邻道选择性还具有监管和操作方面的后果。电信管理机构通常设定选择性标准，以确保频谱的公平使用并最小化用户之间的干扰。遵守这些标准对于服务提供商保持其许可证并高效运营至关重要。展望未来，技术进步继续增强邻道选择性。软件定义无线电（SDR）和自适应滤波技术的创新有望改善接收器动态处理邻道干扰的能力。这一演变将使无线电频谱的使用更加高效，以适应日益增长的无线服务需求。总之，邻道选择性是电信中的一个基本概念，在确保有效通信方面发挥着至关重要的作用。它的重要性在模拟和数字系统中均显而易见，过滤掉不必要信号的能力直接影响服务质量。随着技术的进步，保持高水平的邻道选择性的重要性只会增加，这突显了在这一无线通信关键领域持续研究和发展的必要性。