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Spread spectrum merupakan sistem dimana sinyal yang dikirimkan memiliki bandwidth yang jauh lebih lebar daripada bandwidth sinyal informasinya sendiri. Proses pelebaran bandwidth sinyal informasi ini dilakukan pada sisi pengirim dan disebut spreading. Sebaliknya, proses penyempitan kembali bandwidth sinyal informasi dilakukan di sisi penerima, dan disebut despreading. Pada gambar 1 berikut menunjukkan proses yang terjadi pada sistem spread spectrum.

该书详细介绍了数学建模中最基本、使用最为广泛的算法，同时附上了相应的例子进行分析，对于数学建模初学者来说，用处很大。(The book details some of the most basic mathematical modeling, the most widely used algorithms, together with the corresponding example analysis, mathematical modeling beginners very useful.)

matlab源程序 用于计算声子晶体的能带结构(Matlab source program The band structure for the calculation of phononic crystals)

说明：  OFDM中schmidl 的定时同步算法，包含不同信噪比下的性能(Schmidl in the OFDM timing synchronization algorithm, including the performance under different signal to noise ratio)

说明：  使用分形维数来提取缺陷中的感兴趣区域，本科毕业设计程序(Used to extract the fractal dimension of defects in the region of interest, graduate design program)

捷联惯性导航的扩展卡尔曼滤波的算法，非常好用的算法(Strapdown initial navigation)

小波包分析提取振动信号中的特征频率，含噪脉冲信号进行相关检测,包括调制，解调，信噪比计算。( Wavelet packet analysis to extract vibration signal characteristic frequency, Noisy pulse correlation detection signal, Includes the modulation, demodulation, signal to noise ratio calculation.)

MATLAB图形处理源码程序经典实例MATLAB graphics classic example of source program(MATLAB graphics classic instance of the source program MATLAB graphics classic example of source program)

ofdm 基带传输 信道编码译码 卷积码译码(OFDM baseband transmission channel coding and decoding the convolutional code decoder)

Includes source codes to find DFT of a sequence, to find odd and even components of a signal, to perform PSK, FSK, QPSK.