利用RTDX实现PC与DSP间的数据通信，包含RTDX相关的功能说明和设置及两端源码。...

周立功 深入浅出ARM7-lpc213x上-Week Ligong easy on ARM7-lpc213x

UWB超宽带信号。PAM调制RAKE接受机MATLAB源代码。可以用在仿真中-UWB Ultra-wideband signal. PAM modulation RAKE receiver MATLAB source code. Can be used in simulation

这个代码是matlab仿真的在没有协作用户的情况下，进行的误码率性能仿真。-Matlab simulation of this code is the collaboration of users in the absence of circumstances, to carry out simulation of BER performance.

这是一个有关matlab的编程，是关于fm，dsb调制与解调的程序。-This is a question matlab programming is on the fm, dsb modulation and demodulation process.

QAM的demo程序，功能很强大，有系统框图，很好理解。对于整个系统的设计帮助很大-matlab qam demo

实例支持中文短信，PDU格式，使用Delphi开发

对原始的 ALOHA 协议的改进是"时隙 ALOHA"，介绍了离散的时隙，并增加最大的吞吐量。一个站可以发送只有初时隙和因而减少碰撞事故。在这种情况下，我们只需要对传输尝试 1 帧时间内不连续 2 帧-次，担心，因为在每个时隙期间只能发生碰撞。

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

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.

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.