sensor

多载波调制(Multicarrier Modulation)采用了多个载波信号。它把数据流分解为若干个子数据流，从而使子数据流具有低得多的传输比特速率，利用这些数据分别去调制若干个载波。所以，在多载波调制信道中，数据传输速率相对较低，码元周期加长，只要时延扩展与码元周期相比小于一定的比值，就不会造成码间干扰。因而多载波调制对于信道的时间弥散性不敏感。多载波调制可以通过多种技术途径来实现，如多音实现(Multitone Realization)、正交多载波调制(OFDM)、MC-CDMA和编码MCM(Coded MCM)。其中，OFDM可以抵抗多径干扰，是当前研究的一个热点。(Multi carrier modulation (Multicarrier Modulation) uses multiple carrier signal. It decomposes a data stream into a plurality of sub data stream, so that the sub data stream transmission bit rate is much lower, respectively to a plurality of carrier modulation using these data. )

In order to capture the spatial dependence of gray-level values which contribute to the perception of texture, a 2d dependence matrix known as a gray-level co-occurrence matrix is extensively used in texture analysis.So, this is a code that calculate a co-occurrence matrix of the image and return the following features: ENERGY, CONTRAST, CORRELATION and HOMOGENEITY.

Sample Code which helps to understand how to use LocationManager.

倒立摆的数学建模以及各种控制的方案与实验结果(Inverted pendulum control of mathematical modeling and a variety of programs and experimental results)

matlab仿真中用s函数编写的信号频率测定程序(s function matlab simulation using test procedures prepared by the signal frequency)

STFT语音信号的处理，用短时傅里叶变换进行语音信号的处理(STFT Processing a speech signal)

16QAM通过带限信道，设码元速率为1000波特，传输的滚降系数是0.75的滚降升余弦滤波器(16QAM by band-limited channel, set the symbol rate is 1000 baud, roll-off factor of transmission is 0.75 rolloff raised cosine filter)

hey i am uploading this code for modulation in matlab...check this out

通过pwm控制DC电动机的定子电压的Matlab仿真( PWM EXCITATION DC motor)

自己写的用于调试美国产的卫星接收机输出信号的软件，里面包含有接收机协议。(the soft weare writed by vc6.0,use for debug the signal of the receiver )