数据与计算机通信（第七版 影印版） 答案2

hi this is ofdm and its fading model

A satellite is any object that orbits another object. In popular usage, the term satellite normally refers to an artificial satellite. A planet, or any other body, which finds itself at any distance from the sun with no "sideways" velocity will quickly fall without missing the sun.-A satellite is any object that orbits another object. In popular usage, the term satellite normally refers to an artificial satellite. A planet, or any other body, which finds itself at any distance from the sun with no "sideways" velocity will quickly fall without missing the sun.

GMAIL 文本客户端要读取/发送消息。 很有用的如果你在 ssh 连接和你不想要打开 （或您不能） 一个 GUI 或浏览器来读取您的电子邮件。此客户端允许连接到服务器、 阅读电子邮件、 发送新电子邮件和更多 ！ 您还可以使用此代码连接到另一台 IMAP 服务器。

本例用matlab语言实现了4QPSK的编解码及通过awgn信道的仿真。采用蒙特卡罗仿真法，得到误码性能，绘制曲线。可用于算法研究或课程学习。-Matlab language used in this case achieved 4QPSK codec and channel through awgn simulation. Monte Carlo simulation method, the BER performance, drawing curves. Algorithm can be used for research or courses.

用vc编的，实现两台计算机之间通过串口进行通信。- Arranges with vc, realizes between two computers to carry on the correspondence through the string mouth.

数据传输，数字传输，或数字通信的物理数据传输（数字比特流）

CDMA based Wireless Transceiver system MATLAB and FPGA implementation.pdf

堆积（heap）是树结构的第三种型态。堆积是一棵二元树，其左右子树节点的值均较其父母节点的值小。堆积的根节点值保证是该树最大值。这中堆绩称为最大堆绩。堆积的子树可摆在左边当左子树，也可摆在右边当右子树，因此左右子树俱有相同的性质。-Heap (heap) are the third type of tree structure. Accumulation is a binary tree, its about the value of subtree nodes than those of their parents the value of small nodes. Accumulation are the root of the tree to ensure that the value of Maximum. This is known as the greatest performance in the reactor performance heap. Accumulation of sub-tree can be placed at the left when the left subtree can also be placed on the right when the right subtree, so there is about the same subtree of the nature of both.

modbus协议-----51端程序的实现-modbus protocol----- 51-side programs to achieve

GPRS通信样例代码，采用成都众山GPRS芯片。可实现无线通信-GPRS communication sample code, the use of Chengdu hills GPRS chip. Can realize wireless communication