matlab-tools

关于信号与系统的习题MATLAB编程，希望对大家有用。(some files about signal and system )

说明：  OFDM是将高速串行数据分成成百上千路并行数据,并分别对不同的载频进行调制,这种并行传输体制大大扩展了符号的脉冲宽度,提高了抗多径衰落的性能。同时,在传统的频分复用方法中,各子载波之间的频谱互不重叠,频谱利用率较低。而采用OFDM技术,一个OFDM符号之内包括多个经过调制的子载波的合成信号,每个子载波在频谱上相互重叠,这些频谱在整个符号周期内满足正交性,因而在接受端可以保证无失真恢复,从而大大提高频谱利用率。(OFDM divides high-speed serial data into hundreds of parallel data channels and modulates different carrier frequency separately. This parallel transmission system greatly expands the pulse width of symbols and improves the performance of anti-multipath fading. At the same time, in the traditional method of Frequency Division multiplexing, the spectrum between the sub-carriers does not overlap each other, the spectrum utilization ratio is low. In the case of OFDM, an OFDM symbol consists of multiple modulated sub-carriers, each of which overlaps in the spectrum, which is orthogonal throughout the symbol period, thus, no distortion recovery can be ensured at the receiving end, thus greatly improving the spectrum utilization ratio.)

说明：  用BP算法在matlab里面实现预测交通运输量的预测(we use Grey Relation Analysis(GRA) to model and analyze the freight volume and its influencing factors in Xiang yang city ,in order to find out the main factors affecting the freight volume .The results show that the main factors affecting th-e freight volume of Xiang yang city are the total retail sales of consumer goods,GDP,per ca-pita GDP ,ttertiary industry and so on.)

bootstrap method for calculate realibility of one shot system and simulation for accuracy it

具有最大功率点跟踪功能的光伏电池，采用matlab编写，可以用于光伏系统的仿真实验(pv battery with mppt function, written under matlab,it can be used in pv system simulation)

travel guide to boston

NeuralNetworkRbf程序，很好很强大。肯定能用。(NeuralNetworkRbf)

3GPP标准中用于MIMO信道建模的SCM信道模型，matlab版本(3GPP standard for MIMO channel modeling SCM channel model, matlab version)

calcul the 3j matrice for quatic physics

program tracking red object