Simulationof-multi-ball

this code is developed for weak signal detection in impulsive noise environment.

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) .)

基于于MATLAB的π/4 - DQPSK系统仿真源程序，非常有用(Based on MATLAB-π/4- DQPSK system simulation source code, very useful)

这是一个改进的自适应canny算法，该方法采用改进的开关型中值滤波器对图像做去噪工作，再把整幅图像分割为若干子图像，最后在充分考虑全局以及各子图像的边缘梯度信息后，自适应地生成动态阈值。(The new Canny adaptive method divides image into sub-images,then determinates the thresholds automatically according to the whole image edge information and the sub-images edge information.)

横向各相同性介质的各个弹性系数，方便进一步计算其它弹性性质(the elastic properties of TI media)

FIR滤波器， 设计一个线性相位有限冲激响应低通滤波器，使其满足如下指标：通带边界为2kHz，阻带边界为2.5kHz，通带波纹 =0.005，阻带波纹 =0.005，抽样率为10kHz。采用多尔夫-切比雪夫窗进行设计，进行频谱分析。(FIR filter, design a linear phase FIR low-pass filter to meet the following indicators: passband border to 2kHz, stopband border to 2.5kHz, passband ripple = 0.005, stop-band ripple = 0.005, sampling rate of 10kHz. Used Dorf- Chebyshev window design, spectral analysis.)

通过虚拟阵元进行DOA估计，基于分段非线性权重值的Pso算法，基于SVPWM的三电平逆变的matlab仿真，这个有中文注释，看得明白，计算多重分形非趋势波动分析，现代信号处理中谱估计在matlab中的使用。( Conducted through virtual array DOA estimation, Based on piecewise nonlinear weight value Pso algorithm, Based on SVPWM three-level inverter matlab simulation, The Chinese have a comment, understand it, Calculate the multifractal trend fluctuation analysis, Modern signal processing used in the spectral estimation in matlab.)

说明：  QPSK（四进制相移键控）信号调制解调过程（经高斯信道）的仿真(QPSK (quaternary phase shift keying) signal modulation and demodulation process (by the Gaussian channel) of the simulation)

测量导线网matlab数据导入程序，具有良好的数据实现功能(Traverse network matlab data into the program, with good data to achieve functional)

旋转机械二维全息谱计算的实用例程，包含CV、CA、Single、当前、恒转弯速率、转弯模型，小波包分析提取振动信号中的特征频率。( Rotating Machinery dimensional hologram of practical spectrum calculation routines, It contains CV, CA, Single, current, constant turn rate, turning model, Wavelet packet analysis to extract vibration signal characteristic frequency.)