视频电话的信令流程，主要在基站和终端…

原模图分析译码门限值时，传统的EXIT不能用，所以采用pexit图，是原模图分析的最重要的工具。文中提出了一种新的外部信息转移分析方法，主要针对基于原模图和多边形的LDPC码 ，进一步介绍了边连接的限制，对于这一类的许多类型的码字，传统的EXIT图分析方法不能应用，文中提出的PEXIT图考虑了边的连接，允许对基于原模图的LDPC码的译码收敛估计，允许设计高结构化的接近容量的LDPC码

rtp document , it is useful for learning rtp-rtp document, it is useful for learning rtp

CRC的全称为Cyclic Redundancy Check，中文名称为循环冗余校验。它是一类重要的线性分组码，编码和解码方法简单，检错和纠错能力强，在通信领域广泛地用于实现差错控制-CRC called the Cyclic Redundancy Check, the Chinese name of the Cyclic Redundancy Check. It is an important class of linear block codes, encoding and decoding method is simple, and error detection and correction capability in the field of communication widely used to achieve error control

I2C 通信中只涉及两条信号线，即时钟线 SCL 和数据线 SDA。时钟线为高电平时均可锁存数据（即时钟线上升沿到下降沿之间）。当时钟线 SCL 高电平时，如果把数据线 SDA 从高 电平拉到低电平，则表示通信开始；如果把数据线 SDA 从低电平拉到高电平，则表示通信结束。 代码中分了两个模块，iic_com 模块除了执行和 I2C 通信有关的代码设计外，还有按键检测部分，而 led_seg7 模块只是驱动数码管显示从 AT24C02 指定地址读出的数据。

OFDM simulation for timing recovery

wap开发品台产品 手机变成年升毫 很好用的-development WAP phones goods into Taiwan products, or the good cents

In this simulink model , baseband binary detection is simulated .A rectangular pulse shaped signal is given as input to the detector.The received signal is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The binary signal transmitted is recovered at the detector output.-In this simulink model , baseband binary detection is simulated .A rectangular pulse shaped signal is given as input to the detector.The received signal is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The binary signal transmitted is recovered at the detector output.

基于手机平台的人脸识别系统设计，很前沿的东西。值得珍藏-Mobile phone platform based on face recognition system design, it is the forefront of things. Worthy of collection

SCM 信道模型的相关仿真程序：3GPP-TR-25.996-SCM channel model of the relevant simulation program: 3GPP-TR-25.996

HP688的电话薄程序-HP688 Yellow Page program