### 电子工程代写|电子系统工程代写Digital Systems Engineering代考|CSE241

statistics-lab™ 为您的留学生涯保驾护航 在代写电子系统工程Systems Engineering方面已经树立了自己的口碑, 保证靠谱, 高质且原创的统计Statistics代写服务。我们的专家在代写电子系统工程Systems Engineering方面经验极为丰富，各种代写电子系统工程Systems Engineering相关的作业也就用不着说。

• Statistical Inference 统计推断
• Statistical Computing 统计计算
• (Generalized) Linear Models 广义线性模型
• Statistical Machine Learning 统计机器学习
• Longitudinal Data Analysis 纵向数据分析
• Foundations of Data Science 数据科学基础

## 电子工程代写|电子系统工程代写Digital Systems Engineering代考|Analogue Communication, Digital Communication

Analog or analogue ${ }^{5}$ communication is the transmission and reception of continuoustime signals. A typical continuous-time signal, or analogue signal, is one which is defined for all values of time and a representative sample is shown in Fig. 1.6.
Examples of analogue communication are

1. The transmission of an audio signal for AM or FM radio,
2. The transmission of audio and video signals for television and
3. Transmission of voice through telephone wires prior to the present digital revolution ( $c$ 1960).
On the other hand, examples of digital transmission are
4. Transmission of signals over the Internet,
5. Information sent over a LAN and
6. Mobile communication.
In the ycars from 1910 up to 1960 , most communication was of the analoguc varicty. Three types of communication systems were in use: radio, television and telephone. Radio and television used the atmosphere above the ground as the communication channel while telephone used wires and the mode was analogue communication in all three. Today, telephone communication is mainly digital but radio and TV are still analogue. We expect developments in the future whereby all communication is heading towards a digital revolution. For example, better communication performance occurs when we use digital systems in television as in the case of HDTV.
7. Therefore, the natural question which arises is that why study analogue communication at all? The real answer to this question is that all digital systems in the most essential sense are analogue in nature, and the design of these systems is buried in analogue communication theory. Consequently, if we do not study analogue communication, then our understanding of digital communication would be incomplete.
8. What are the advantages and disadvantages of analogue communication? The fact of the matter is that analogue communication is very simple in its essentials and very inexpensive to implement, though some parts of the design may be complicated. But although analogue systems are less expensive in many cases than digital ones for the same application, digital systems offer better performance and overall greater flexibility. But the greatest advantage of digital communication is the immunity from noise. Digital communication, through complex hardware design, can virtually overcome the problem of noise cluttering the signal.

With the increased speed of digital hardware, the development of increasingly efficient theory of digital communication and the ability to form a good communication infrastructure, digital communication is indeed now the best choice for many situations.

## 电子工程代写|电子系统工程代写Digital Systems Engineering代考|Signal Transformations

When we study engineering communication, a great deal of manipulation of signals have to be performed. With this in mind, we need to understand the transformation of signals, both of the dependent variable and independent variable. We take a look at these two types of transformations.

If we consider a real signal $y(t)$, which is a function of time, then $y$ is the dependant variable and $t$ is the independent variable. Generally, the independent variable is on the $\mathrm{x}$-axis while the dependent variable is on the $\mathrm{y}$-axis. The independent variable values may be chosen in an independent manner, while the ones for the dependent variable are obtained from the independent variable according to a rule. (i.e. the function $y(t))$.
We will be considering two types of transformations:

1. Transformations of the dependent variable.
2. Transformations of the independent variable.

## 电子工程代写|电子系统工程代写Digital Systems Engineering代考|Analogue Communication, Digital Communication

1. 为 AM 或 FM 收音机传输音频信号，
2. 用于电视和视频的音频和视频信号的传输
3. 在当前数字革命之前通过电话线传输语音（C1960）。
另一方面，数字传输的例子是
4. 通过互联网传输信号，
5. 通过 LAN 发送的信息和
6. 移动通讯。
在 1910 年到 1960 年的汽车中，大多数通信都是类比的。使用了三种类型的通信系统：无线电、电视和电话。广播电视使用地面大气作为通信渠道，电话使用有线，三者均采用模拟通信方式。今天，电话通信主要是数字的，但广播和电视仍然是模拟的。我们期待未来的发展，所有通信都将走向数字革命。例如，当我们在电视中使用数字系统（如 HDTV）时，会产生更好的通信性能。
7. 因此，自然产生的问题是，为什么要研究模拟通信？这个问题的真正答案是，所有最基本意义上的数字系统本质上都是模拟的，而这些系统的设计隐藏在模拟通信理论中。因此，如果我们不研究模拟通信，那么我们对数字通信的理解将是不完整的。
8. 模拟通信的优缺点是什么？事实是，模拟通信的基本要素非常简单，实现起来非常便宜，尽管设计的某些部分可能很复杂。但是，尽管在许多情况下，对于相同的应用，模拟系统比数字系统更便宜，但数字系统提供了更好的性能和总体上更大的灵活性。但数字通信的最大优势是不受噪声影响。数字通信通过复杂的硬件设计，几乎可以克服噪声干扰信号的问题。

1. 因变量的变换。
2. 自变量的变换。

## 广义线性模型代考

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## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。