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5
说明： 5. 在三条径的瑞利信道中，对于直接序列扩频：
(1) 请设计DS-CDMA一种具体的码分导引辅助的信道估计方法，接收机分别采用等均益合并、最大比合并。用Simulink进行仿真，画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。
(2) 设频率已经同步，请设计DS-CDMA一种具体的单停顿滑动相关时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。
(3) 设时间已经同步，请设计DS-CDMA一种具体的频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(5. In three-path Rayleigh channel, for direct sequence spread spectrum:
(1) please design a specific code division navigation aided channel estimation method for ds-cdma, and adopt equal-beneficial combination and maximum ratio combination for receivers respectively.Simulink is used to simulate and draw the relationship curve between bit SNR and channel estimation mean square error and the relationship curve between bit SNR and bit error rate.
(2) assuming that the frequency has been synchronized, please design a specific single-stop sliding correlation time synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and the acquisition probability curve.
(3) if the time has been synchronized, please design a specific frequency synchronization method ds-cdma, Simulink simulation, draw the relationship between the bit SNR and frequency synchronization error curve.)
- 2019-01-15 10:58:23下载
- 积分：1
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Zlg_Modbus
MODBUS是工业领域通信协议的业界标准。这是周立功MODBUS的源码，适合应用和学习，需要的朋友可以看看。(MODBUS communication protocol is the industry standard in the industry. This is Zhou Ligong MODBUS source code, suitable for application and study, need friends can look at.)
- 2013-10-29 16:35:44下载
- 积分：1
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Air-interface-physical-link-layer
主要介绍空中接口物理链路层的无线技术，共分三个部分，首先对主要接口和协议作
简单介绍和描述；然后分别介绍信道与帧；无线信道编码与交织以及LAPDm。(Mainly introduces Wireless technology of air interface in the physical link layer which is divided into three parts. first: a brief introduction and description of the main interfaces and protocols then:Road and frame and last radio channel coding and interleaving and LAPDm .)
- 2013-05-07 16:57:20下载
- 积分：1
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Serial_procedures
串口程序，实现串口发送，接受文件，用户只有少做修改就可以为自己所有(Serial procedures, implementation serial send, receive documents, the user only a few modifications can make all their own)
- 2009-03-30 23:05:51下载
- 积分：1
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HC-SR501
51单片机，通过人体红外热释电模块检测人数，并计数。(51 single chip computer, through the human body infrared pyroelectric module to detect the number of people, and count.)
- 2020-06-20 18:00:01下载
- 积分：1
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MySocket
vc++开发的socket通信类（含客户端和服务端）(socket communication(include client and server))
- 2013-08-12 14:13:49下载
- 积分：1
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log4net-2.0.8-src
说明： Log4net.dll是著名的Apache软件为.net framework 2框架准备的支持库，方便在不同的平台上得到功能支持。(Log4net. DLL is a support library prepared by Apache software for.NET Framework 2. It is convenient to get functional support on different platforms.)
- 2020-10-31 15:59:55下载
- 积分：1
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protobuf-build
说明： 一种轻便高效的数据格式，平台无关、语言无关、可扩展，可用于通讯协议和数据存储等领域。完整的编译工程。(A portable and efficient data format, platform-independent, language-independent, scalable, can be used in communication protocols and data storage and other fields. Complete compilation engineering.)
- 2020-06-17 21:00:07下载
- 积分：1
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AGC
说明： 数字AGC仿真代码适合于基础的了解数字控制模块(Digital AGC simulation code is suitable for understanding the basis of the digital control module)
- 2008-10-16 17:22:19下载
- 积分：1
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PLC-OFDM
实现电力线通信信道建模及其基于OFDM调制系统环境下仿真。(Power line communication channel modeling and simulation of OFDM system)
- 2020-06-28 16:00:02下载
- 积分：1
