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[matlab] ClusterBasics-V1.0 DL : 0: 各类聚类算法程序包，包含各种经典的聚类算法，例如：k-mean聚类等-Various types of clustering algorithm package, contains a variety of classic clustering algorithms, such as: k-mean clustering, etc.
Date : Size : 197kb User : 王朝霞
[Algorithm] cordic DL : 0: cordic methods describe essentially the same algorithm that with suitably chosen inputs can be used to calculate a whole range of scientific functions including sin, cos, tan, arctan, arcsin, arccos, sinh, cosh, tanh, arctanh, log, exp, square root and even multiply and divide. the method dates back to volder [1959], and due to its versatility and compactness, it made possible the microcoding of the hp35 pocket scientific calculator in 1972. here is some code to illustrate the techniques. ive split the methods into three parts linear, circular and hyperbolic. in the hp35 microcode these would be unified into one function (for space reasons). because the linear mode can perform multiply and divide, you only need add/subtract and shift to complete the implementation. you can select in the code whether to do the multiples and divides also by cordic means. other multiplies and divides are all powers of 2 (these dont count). to eliminate these too, would involve ieee hackery.-cordic methods describe essentially the same algorithm that with suitably chosen inputs can be used to calculate a whole range of scientific functions including sin, cos, tan, arctan, arcsin, arccos, sinh, cosh, tanh, arctanh, log, exp, square root and even multiply and divide. the method dates back to volder [1959], and due to its versatility and compactness, it made possible the microcoding of the hp35 pocket scientific calculator in 1972. here is some code to illustrate the techniques. ive split the methods into three parts linear, circular and hyperbolic. in the hp35 microcode these would be unified into one function (for space reasons). because the linear mode can perform multiply and divide, you only need add/subtract and shift to complete the implementation. you can select in the code whether to do the multiples and divides also by cordic means. other multiplies and divides are all powers of 2 (these dont count). to eliminate these too, would involve ieee hackery.
Date : Size : 2kb User : waqas
[Mathimatics-Numerical algorithms] MeanShiftCluster DL : 0: Mean shift clustering. K means clustering.
Date : Size : 2kb User : Ezekiel
[matlab] OQPSK-Demodulator-projekt DL : 1: OQPSK Demodulation Project in Matlab. OQPSK means offset quadrature phase shift keying. an important modulation scheme in IEEE 802.15.4
Date : Size : 3kb User : rc13
[Algorithm] www DL : 0: 使用维纳分布进行瞬时频率估计用来校正电离层非线性相位污染带来的频带展宽-High-frequency (HF) sky-wave radar signals propagate to and from the target by means of the ionosphere. The difficulty in obtaining very narrow beamwidths at HF, and the long ranges involved, mean that the signal backscattered from the ground is often several orders of magnitude greater than the target echo. To resolve the target, coherent signal processing techniques are necessary, detecting the target echo by virtue of the Doppler shift caused by the target’s radial velocity. Unfortunately, movement of the ionospheric layer by which the radar signal has propagated often causes the clutter spectrum and target to spread in the frequency domain, rendering extended coherent integration pointless. The movement of the ionosphere can be regarded as producing frequency modulation of the radar signal, and thus if this modulation can be estimated the radar signal may be corrected for the ionospheric contamination. A technique using the complex argument of the first-order mo
Date : Size : 601kb User : sunrong
[matlab] Binary_PSK DL : 0: This script simulates the Binary Phase Shift keying. Since BPSK is a digital modulation scheme, you can modulate as many bits as you want. however, I have only simulated it for few bits, so that the results are visible. This is code for BPSK only, means it can only modulated two digital states on two different phases. I hope this will help out students and instructors alike. MATLAB release MATLAB 7.7 (R2008b)
Date : Size : 2kb User : Rafal
[matlab] doc_pnseq21 DL : 0: Pseudo Noise Sequences A pseudo-noise (PN) sequence is a periodic binary sequence ,usually generated by means of feedback shift register
Date : Size : 7kb User : RRaji
[matlab] OFDM_BPSK DL : 0: You can learn BPSK modulation in OFDM Systems BPSK means binary phase shift keying modulation. Basically OFDM uses fft/ifft modulation. and add cyclic shift and remove to cancel inter-symbol-interference.
Date : Size : 2kb User : kevin Jun
[matlab] xhmdecode DL : 0: 循环码最大的特点就是码字的循环特性，所谓循环特性是指：循环码中任一许用码组经过循环移位后，所得到的码组仍然是许用码组，也就是说，不论是左移还是右移，也不论移多少位，仍然是许用的循环码组. 译码过程第一步：由接收码字  Rx与监督矩阵相乘得出错误图样S；第二步：判断S是否为零。若不为零，则出错。在假定至多只有一位错的情况下，可以有效地译出相应的信息码字。第三步：在出错的情况下，将S与标准监督矩阵对比，得出错误的比特位并进行更正得出前四位为信息码字。-Ring Code biggest feature is the cycle characteristics of code words, the so-called cycle characteristics means: a cyclic code in any code group after the allowable cyclic shift, the resulting code group is still permissible code group, that is, whether It is left or right, regardless of the number of shift bits still set cyclic code with Xu. The first step in the decoding process: the received codeword   Rx and monitoring matrix obtained by multiplying the error pattern S Step two: Analyzing S is zero. If zero, the error. Under the assumption that at most only one wrong circumstances, can be effectively translated to the corresponding information code word. The third step: in case of an error, the S criteria for comparing and monitoring matrix draw the wrong bit and make corrections to information obtained first four codewords.
Date : Size : 1kb User : 高山