Noise_down

function g=nonlineareq(x) Here is an example of nonlinear system that can be solved by using the Matlab command "fsolve" written in the file called "solution.m"

求连续函数的卷积，利用matlab中的conv函数实现(Seek a continuous function of the convolution, using the conv function in Matlab to achieve)

说明：  为了提高认知无线电中感知用户对授权用户(主用户) 的检测概率,提出一种新的基于循环 谱统计量的主用户信号检测算法. 该算法利用循环谱离散频域平滑方法,对信号的循环谱在循环频 率处建立合理的检测统计量,然后求解得到对应不同虚警概率的判决门限,以使感知用户能检测信 噪比更低的授权用户信号.(To increase the detection probability of sensing users for licenced users (primary signals) in the cognitive radio , it put s forward a new primary users signal method based on cyclic spect rum statis2 tics. By using discrete f requency smoothing of cyclic spect rum , this algorithm establishes the reason2 able detection statistics on the cyclic f requency of signal cyclic spect rum , then solves and obtains the decision threshold correspond to different false alarm probability , as a result , making the sensing users can detect licenced users signal under lower signal in noise ratio (SNR) .)

基于matlab2011b，接三相独立负载，给需要的朋友分享。(Based matlab2011b, connected three independent load to the need to share.)

QPSK信号通过Rayleigh信道，并计算出误码率(QPSK signals go through Rayleigh channel)

说明：  扩展卡尔曼滤波器程序，只需改相关参数即可(Extended Kalman filter process)

matlab 蚁群算法，用于计算遍历所有节点的最优路径，学生弄的，大家莫喷。。。(matlab ant colony algorithm for calculating the optimal path to traverse all nodes, the students get, Mo spray. . .)

针对主成分分析的很实用的程序，只需要把所掌握的数据带入，就可以获得一系列的数据，包括相关矩阵、载重、主成分贡献率等。(Principal component analysis and practical program, simply put into the master data, you can get a range of data, including the correlation matrix, load, principal component contribution rate.)

matlab的另一个功能就是应用在图像处理上。有强大的能力处理图像。希望对读者有很大的帮助(Another feature is the application of matlab in image processing. Has a strong ability to handle images. Hope to be very helpful to readers)

computes the intersection of a plane and a segment