《数字通信（2019年版）》

English | PDF,EPUB | 2018 (2019 Edition) | 329 Pages | ISBN : 303000547X | 24.17 MB

This book offers students, scientists and engineers an extensive introduction to the theoretical fundamentals of digital communications, covering single input single output (SISO), multiple input multiple output (MIMO), and time-variant systems. Further, the main content is supplemented by a wealth of representative examples and computer simulations. The book is divided into three parts, the first of which addresses the principles of wire-line and wireless digital transmission over SISO links. Digital modulation, intersymbol interference, and various detection methods are discussed; models for realistic time-variant, wireless channels are introduced; and the equivalent time-variant baseband system model is derived.

Since not all readers may be familiar with this topic, Part II is devoted to the theory of linear time-variant systems. The generalized convolution is derived and readers are introduced to impulse response, the delay spread function, and system functions in the frequency domain. In addition, randomly changing systems are discussed.

In turn, Part III deals with MIMO systems. It describes MIMO channel models with and without spatial correlation, including the Kronecker model. Both linear and nonlinear MIMO receivers are investigated. The question of how many bits per channel use can be transmitted is answered and maximizing channel capacity is addressed. Principles of space–time coding are outlined in order to improve transmission quality and increase data rates. In closing, the book describes multi-user MIMO schemes, which reduce interference when multiple users in the same area transmit their signals in the same time slots and frequency bands.

这本书为学生、科学家和工程师提供了一个广泛的数字通信理论基础介绍，涵盖了单输入单输出（SISO）、多输入多输出（MIMO）以及时变系统。此外，主要内容配以丰富的示例和计算机模拟。 本书分为三部分，第一部分探讨了通过SISO链路进行有线和无线数字传输的原理。讨论了数字调制、符号间干扰以及各种检测方法；介绍了现实时间变无线信道模型，并推导出等效的时间变基带系统模型。 第二部分专门介绍线性时变系统的理论。推导出了广义卷积，读者被引入到脉冲响应、延迟散布函数和频域中的系统函数中。此外，随机变化的系统也被讨论了。 第三部分处理MIMO系统。它描述了带有和不带空间相关性的MIMO信道模型，包括Kronecker模型。线性和非线性MIMO接收机都被研究了。回答了多少比特每信道使用可以传输的问题，并且针对最大化通道容量进行了探讨。为了改善传输质量和提高数据速率，提出了空时编码的原则。最后，本书描述了多用户MIMO方案，在这种方案中，当多个用户在同一时间隙和频带发送信号时，降低干扰。

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