ch01_2ed

说明：  用matlab程序模拟实现cdma系统的整个过程。包括并串、串并转换，m序列的产生，直接扩频、解扩，qpsk的调制解调，载波调制解调等。(Matlab simulation procedures used to achieve the whole process of cdma systems. Including and string SERDES, m sequence generation, direct spread spectrum, despreading, qpsk the modulation and demodulation, carrier modulation and demodulation, etc..)

simulink 例程。电力电子课程用。参数已设置好。(The simulink routine. Power electronics courses. Parameters have been set up.)

合成地震记录是用声波测井或垂直地震剖面资料经过人工合成转换成的地震记录（地震道） 合成记录的制作是一个简化的一维正演的过程，合成记录F(t)是地震子波S(t)与反射系数R(t)褶积的结果。(Synthetic seismogram is sonic or vertical seismic profile data after conversion into synthetic seismograms (seismic trace) the production of synthetic seismogram is a simplified one-dimensional forward modeling process, synthetic seismogram F (t) is the seismic wavelet S (t) and the reflection coefficient R (t) the convolution results.)

hilditch.m是hilditch细化算法。 RC_unwrap.m是逐行逐列去包裹算法。 least_unwrap.m是最小二乘去包裹算法。 FTP.m是利用傅里叶变换提取相位。 sincosfilter.m是正余弦滤波算法。 以上算法在相位图的相关计算中常用到，比如电子散斑干涉、全息干涉、相移技术等。 (hilditch.m is hilditch refinement algorithm. RC_unwrap.m is listed line by line unwrapping algorithm. least_unwrap.m is the least squares unwrapping algorithm. FTP.m is extracted by Fourier transform phase. sincosfilter.m is the cosine filter. Above algorithm in the calculation of phase diagrams related to the commonly used, such as electronic speckle pattern interferometry, holographic interferometry, phase shift technology.)

CRC check for WLN frame word！

改进之前做过的倒立摆控制程序，使用PID控制并分析其性能(Improvements done before the inverted pendulum control procedures, the use of control and analysis of its performance PID)

fbp 三维重建 基于压缩感知的计算机成像(san wei c jian)

坐标系变换，有球心坐标系转换为地理坐标系(the conversion between the coordinates)

对信道编码的模块测试和系统测试。包含内外编码、突发长度、AWGN信道、莱斯信道、瑞利信道、信道自环等。(The channel coding module testing and system testing. Includes internal and external coding, burst length, AWGN channel, Rice channel, Rayleigh channel, the channel from the ring.)

the location based collaboration, the change of the spatio- temporal relationship of the people-people or people-place is the key context for collaboration. So, the location based collaborative environment should support the spatio-temporal event sub/pub service. The key problem in spatio-temporal event subscription is how to specify the different spatio-temporal events.