pseudo noise

简明释义

伪噪声

英英释义

例句

1.The pseudo noise 伪噪声 used in CDMA systems allows multiple users to share the same frequency band.

在CDMA系统中使用的 伪噪声 允许多个用户共享同一频带。

2.Engineers often analyze pseudo noise 伪噪声 patterns to optimize signal processing algorithms.

工程师们经常分析 伪噪声 模式，以优化信号处理算法。

3.The pseudo noise 伪噪声 generator creates sequences that mimic random noise for testing purposes.

该 伪噪声 生成器创建模拟随机噪声的序列，用于测试目的。

4.In spread spectrum systems, pseudo noise 伪噪声 helps to improve security and reduce interference.

在扩频系统中，伪噪声 有助于提高安全性并减少干扰。

5.In digital communication systems, pseudo noise 伪噪声 sequences are often used to spread the signal over a wider bandwidth.

在数字通信系统中，伪噪声 序列通常用于将信号扩展到更宽的带宽。

作文

In the realm of digital communications, the concept of pseudo noise plays a crucial role in ensuring the security and integrity of transmitted data. Pseudo noise refers to a sequence of bits that appears random but is actually generated by a deterministic process. This characteristic makes it particularly useful in various applications, including spread spectrum communication systems, where the signal is spread over a wide frequency band. By using pseudo noise, these systems can minimize interference and enhance the robustness of the signal against eavesdropping.The generation of pseudo noise typically involves algorithms known as pseudo-random number generators (PRNGs). These algorithms produce sequences that mimic the statistical properties of true random sequences, making them suitable for applications such as encryption and secure communications. For instance, in a wireless communication system, a sender might use a pseudo noise sequence to modulate the signal being transmitted. This modulation spreads the signal across different frequencies, making it difficult for unauthorized users to intercept or decode the information.One of the primary advantages of using pseudo noise is its predictability. Although the sequences generated may seem random, they can be replicated if the initial conditions and the algorithm are known. This predictability allows for synchronization between the transmitter and receiver, which is essential for effective communication. However, this also means that if an adversary can discover the parameters of the pseudo noise generator, they could potentially decode the transmitted messages.Moreover, pseudo noise is not limited to communications; it is also widely used in various fields such as radar technology, where it helps in distinguishing between the actual signal and background noise. In radar systems, a pseudo noise sequence can be transmitted, and the reflected signals can be analyzed to determine the presence and distance of objects. This application highlights the versatility of pseudo noise in both military and civilian technologies.However, the reliance on pseudo noise does come with challenges. As technology advances, so do the methods used by malicious actors to exploit weaknesses in communication systems. Therefore, while pseudo noise provides a layer of security, it is essential for engineers and security professionals to continually update and strengthen the algorithms used to generate these sequences. New cryptographic techniques and more complex algorithms are being developed to enhance the security of pseudo noise based systems.In conclusion, pseudo noise serves as a fundamental component in modern digital communication systems. Its ability to provide a semblance of randomness while allowing for predictable replication makes it invaluable in securing data transmission. As we continue to navigate the complexities of digital communication and cyber security, understanding and effectively utilizing pseudo noise will remain a priority for researchers and professionals alike. The ongoing evolution of technology will undoubtedly lead to new applications and enhancements in the use of pseudo noise, making it a topic worthy of further exploration and study.

在数字通信领域，伪噪声的概念在确保传输数据的安全性和完整性方面发挥着至关重要的作用。伪噪声是指一系列看似随机但实际上由确定性过程生成的比特序列。这种特性使其在各种应用中尤其有用，包括扩频通信系统，其中信号被扩展到宽频带上。通过使用伪噪声，这些系统可以最小化干扰，并增强信号抵御窃听的鲁棒性。伪噪声的生成通常涉及称为伪随机数生成器（PRNG）的算法。这些算法产生的序列模拟真实随机序列的统计特性，使它们适合于加密和安全通信等应用。例如，在无线通信系统中，发送方可能会使用伪噪声序列来调制所传输的信号。这种调制将信号扩展到不同的频率，使未授权用户难以拦截或解码信息。使用伪噪声的主要优势之一是其可预测性。尽管生成的序列看似随机，但如果已知初始条件和算法，则可以复制这些序列。这种可预测性允许发射器和接收器之间的同步，这是有效通信的关键。然而，这也意味着，如果对手能够发现伪噪声生成器的参数，他们可能会解码传输的消息。此外，伪噪声不仅限于通信；它还广泛应用于雷达技术，在那里它有助于区分实际信号和背景噪声。在雷达系统中，可以传输伪噪声序列，并分析反射信号以确定物体的存在和距离。这一应用突显了伪噪声在军事和民用技术中的多功能性。然而，依赖于伪噪声确实带来了挑战。随着技术的进步，恶意行为者利用通信系统中的弱点的方法也在不断发展。因此，尽管伪噪声提供了一层安全性，但工程师和安全专业人员必须不断更新和加强用于生成这些序列的算法。新的加密技术和更复杂的算法正在开发中，以增强基于伪噪声的系统的安全性。总之，伪噪声作为现代数字通信系统的基本组成部分。它在提供一种随机表象的同时允许可预测的复制，使其在确保数据传输安全方面无价。随着我们继续应对数字通信和网络安全的复杂性，理解和有效利用伪噪声将始终是研究人员和专业人士的优先事项。技术的持续演变无疑将导致伪噪声的新应用和增强，使其成为值得进一步探索和研究的主题。