一个功能齐全的串口通讯类及实例(VC)

QAM调制的基本原理 QAM调制实际上是幅度调制和相位调制的组合。相位 + 幅度状态定义了一个数字或数 字的组合。QAM的优点是具有更大的符号率，从而可获得更高的系统效率。通常由符号率 确定占用带宽。因此每个符号的比特（基本信息单位）越多，效率就越高。-QAM modulation of the basic principles are in fact QAM modulation amplitude modulation and phase modulation of the portfolio. Phase+ margin status defines a combination of numbers or figures. The advantage of QAM symbols are greater rate, thus the system efficiency will be higher. Symbol rate is usually determined by the occupied bandwidth. Thus each bit symbols (basic units of information) the more the higher the efficiency.

GPRS通信程序，可发送数据，并获得GPRS设备的信息。-GPRS communication program can send data, and access to GPRS devices.

This a trainning document about wcdma -This document about a trainning wcdma

this ebook is for basic introduction to CDMA rf enfineering, very good book for basic level

nat穿越开实时通讯开发中是个不可避免的问题，这是个英文文档，希望能给大家带来一些帮助-nat through the development of open real-time communication is inevitable, which is English document, I hope everyone can help bring some

高级数据链路通信编成-advanced data link communications organization

In this simulink model , BPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.-In this simulink model , BPSK modulation and demodulation is simulated .A square root raised cosine pulse shaped signal is modulated and given as input to the demodulator.The received signal is demodulated and given to the detector where it is matched filtered and down-sampled .The effects of symbol timing offset can be seen by varying the phase of down-sampling operation.The signal transmitted is recovered at the detector output.

ErrorProbabilityofMPSKOFDMImpairedbyCarrierFrequency OffsetinAWGNChannels

MSP430单片机串口通信时寄存器的计算程序-MSP430 single chip register when the serial communication program

RS232 是异步串行通信协议，广泛应用在计算机上。异步意味着它不会有任何单独的同步时钟信号，所以它必须同步本身对传入的数据-这是通过使用开始和停止脉冲。信号本身是略有不寻常的计算机，而是作为比正常 0V 到 5V 范围、 它使用 + 12V-12V-到这做是为了提高可靠性，并极大地增加了它可以工作在可利用的范围-不需要提供此确切电压摆动和实际使用 PIC 0V 到 5V 电压摆动和几个电阻可以做一个简单的 RS232 接口，通常会很好但并不保证与所有串行端口的工作。为此我设计了串行板能使用 MAX232 芯片，这是专为 5V 的逻辑级别之间的接口设计的芯片和 + 12V /-12V 的 RS232-它生成的 + 12V /-12V 内部使用电容器充电泵，并包括四个转换器，两个传输和两个接收，只采用的每-其他两个一个串行董事会明确标记为电路如果需要可以用别的东西。