qie_yu64

MMR WiMAX networks sofrware requirement by REWIND project group

对LFM雷达信号及其目标回波进行仿真，并对其干扰进行了仿真(On LFM radar signal and target echo simulation and a simulation of its interference)

Data Encryption by Matrix Multiplication We will only use numbers 0 to 26 for the encryptive mathematics operation. Numbers from 1 to 26 are for letters from A to Z and 0 is for all non-letter characters. To minimize usage of numbers, all letters are converted to upper case. The original message is converted to number array according to the ASCII table and minus 64. We partition whole array into blocks of 8 numbers. The last block may be added several zeros. Then multiply each block by the an 8x8 matrix A which is invertible in Z27 to get cipher data. The decryption is the same process except to use its inverse matrix B. For good visual reading, we convert all non-letter characters to under score for the decryption.

耳蜗实质上相当于一个滤波器组，耳蜗的滤波作用是在对数频率尺度上进行的，在1000HZ下，人耳的感知能力与频率成线性关系；而在1000HZ以上，人耳的感知能力与频率不构成线性关系，而更偏向于对数关系，这就使得人耳对低频信号比高频信号更敏感。Mel频率的提出是为了方便人耳对不同频率语音的感知特性的研究。频率与Mel频率的转换公式为(Cochlear substantially equivalent to a filter set, cochlear filter is used on logarithm frequency scale, under the 1000 hz, the perception of the human ear and a linear relationship with frequency In more than 1000 hz, the perception of the human ear does not constitute a linear relationship with frequency, and prefer to logarithmic relationship, which makes the human ear is sensitive to low frequency signal is better than high frequency signal. Mel frequency is put forward in order to facilitate the ear of the study of speech perception characteristics of different frequency. For frequency and Mel frequency conversion formula )

《MATLAB7.x数字信号处理》的配套光盘，提供给初学者或者需要的朋友。(" MATLAB7.x digital signal processing," CD-ROM package, available to the beginner or need a friend.)

测试对于整个测试集的识别率对于测试集合的识别率(Test for the entire test set recognition rate)

详细介绍了窄带滤波器的设计，如半带，CIC等原理，原理很详细(Details of the narrow-band filter design, such as half-band, CIC and other principles, the principle in detail)

a matlab .m file describing a function acts as high pass filtr on an image

基于MATLAB的小波分析，通用小波函数(MATLAB-based wavelet analysis, general wavelet function)

a)Refer to the LDPC presentation slides provided, and use the input data provided below to decode the codeword Repeat a) with new matrix H, codeword and σ^2 given below(a) Refer to the LDPC presentation slides provided, and use the input data provided below to decode the codeword Repeat a) with new matrix H, codeword and σ ^ 2 given below)