coherent detector

简明释义

相参检波器相干检波器

英英释义

例句

1.Researchers developed a coherent detector that can operate in low-light conditions.

研究人员开发了一种能够在低光条件下工作的相干探测器。

2.Using a coherent detector allows for better resolution in imaging applications.

使用相干探测器可以在成像应用中获得更好的分辨率。

3.The coherent detector was essential for the success of the quantum communication experiment.

该相干探测器对于量子通信实验的成功至关重要。

4.In optical communications, a coherent detector can significantly enhance the signal-to-noise ratio.

在光通信中，相干探测器可以显著提高信噪比。

5.The new radar system uses a coherent detector to improve target tracking accuracy.

新的雷达系统使用相干探测器来提高目标跟踪精度。

作文

In the field of signal processing and communication, the term coherent detector refers to a specific type of device or algorithm that is used to demodulate signals that have been modulated in a coherent manner. A coherent detector utilizes phase information from the received signal to accurately recover the original message signal. This is particularly important in modern communication systems where the integrity and quality of the transmitted data are paramount.The basic principle behind a coherent detector involves the synchronization of the local oscillator with the incoming signal. By achieving this synchronization, the detector can effectively compare the phase of the received signal with that of the local oscillator. This comparison allows for the extraction of both the amplitude and phase information of the signal, which is crucial for accurately reconstructing the transmitted data.One of the main advantages of using a coherent detector is its ability to achieve higher sensitivity and better performance in noisy environments compared to non-coherent detection methods. This is because it takes advantage of the phase information, which can significantly improve the signal-to-noise ratio (SNR). As a result, coherent detectors are widely used in various applications, including radar systems, optical communications, and wireless networks.In radar systems, for example, coherent detectors play a vital role in target detection and tracking. By analyzing the phase shifts of the returned signals, these detectors can provide precise information about the distance, speed, and direction of moving objects. This capability is essential for applications such as air traffic control and military surveillance, where accurate and timely information is critical.Similarly, in optical communication systems, coherent detectors are employed to enhance the performance of data transmission over long distances. The use of phase-sensitive detection techniques allows for the recovery of high-speed data signals with minimal distortion, making it possible to transmit large amounts of information efficiently.Despite their advantages, coherent detectors also come with challenges. One of the primary challenges is the requirement for a stable and accurate local oscillator. Any drift or instability in the local oscillator can lead to significant errors in the demodulation process, resulting in degraded performance. Additionally, the complexity of coherent detectors often requires sophisticated hardware and algorithms, which can increase the cost and power consumption of the overall system.In conclusion, the coherent detector is a powerful tool in the realm of signal processing and communication. Its ability to utilize phase information for accurate signal recovery makes it indispensable in various high-performance applications. While there are challenges associated with its implementation, the benefits it provides in terms of sensitivity and performance continue to drive advancements in this technology. As communication systems evolve and the demand for higher data rates and reliability increases, the role of coherent detectors will undoubtedly become even more significant.

在信号处理和通信领域，术语coherent detector指的是一种特定类型的设备或算法，用于解调以相干方式调制的信号。coherent detector利用接收信号的相位信息来准确恢复原始消息信号。这在现代通信系统中尤为重要，因为传输数据的完整性和质量至关重要。coherent detector的基本原理涉及本地振荡器与传入信号的同步。通过实现这种同步，检测器可以有效地比较接收信号的相位与本地振荡器的相位。这种比较使得提取信号的幅度和相位信息成为可能，而这些对于准确重建传输数据至关重要。使用coherent detector的主要优点之一是其在嘈杂环境中比非相干检测方法具有更高的灵敏度和更好的性能。这是因为它利用相位信息，这可以显著提高信噪比（SNR）。因此，coherent detectors广泛应用于各种应用，包括雷达系统、光通信和无线网络。例如，在雷达系统中，coherent detectors在目标检测和跟踪中发挥着重要作用。通过分析返回信号的相位变化，这些检测器可以提供关于移动物体的距离、速度和方向的精确信息。这种能力对于空中交通控制和军事监视等应用至关重要，在这些场合，准确和及时的信息是关键。同样，在光通信系统中，coherent detectors被用来提高长距离数据传输的性能。利用相位敏感检测技术，可以以最小失真恢复高速数据信号，从而有效地传输大量信息。尽管有其优点，coherent detectors也面临挑战。其中一个主要挑战是对稳定和准确的本地振荡器的要求。本地振荡器的任何漂移或不稳定都可能导致解调过程中的显著错误，从而导致性能下降。此外，coherent detectors的复杂性通常需要复杂的硬件和算法，这可能增加整个系统的成本和功耗。总之，coherent detector是信号处理和通信领域的一种强大工具。它利用相位信息进行准确信号恢复的能力使其在各种高性能应用中不可或缺。尽管实施过程中存在挑战，但它在灵敏度和性能方面所提供的好处继续推动这项技术的进步。随着通信系统的发展以及对更高数据速率和可靠性的需求增加，coherent detectors的作用无疑将变得更加重要。