ccsystems2e_Chapter04

用Remez算法设计一个低通滤波器,分别满足性能参数: 滤波器1 滤波器2 滤波器3 采样率Fs: 20kHz 20kHz 20kHz 通带: 0-3 0-4kHz 0-5kHz 带内波纹: 0.1dB 0.1dB 0.1dB 带内衰减: 60dB 60dB 60dB (With the Remez algorithm to design a low pass filter, respectively, to meet the performance parameters: filter 1 filter 2 filter 3 of the sampling rate Fs: 20kHz 20kHz 20kHz pass band: 0-3 0-4kHz 0-5kHz in-band ripple : 0.1dB 0.1dB 0.1dB in-band attenuation: 60dB 60dB 60dB)

RSSI算法是指根据无线传感器接受到（目标物体）的信号指示强度，计算该信号在传播中的损耗，根据理论或者经验的信号传播模型将信号强度转换成距离。但是这种算法很容易受到天气，障碍物或人员流动的影响，导致测距不精确，从而定位精度不高。但是由于RSSI算法简单，成本低廉，很多无线通信模块提供RSSI值，所以RSSI算法依然应用在众多领域中。(RSSI algorithm is based on wireless sensor to receive the signal intensity (objects), calculate the signal in the transmission loss, according to the experience of the theory or the signal propagation model will be converted into a distance of signal strength.But this algorithm is very vulnerable to weather, obstacles or the influence of the flow of people, lead to range is not accurate, thus positioning accuracy is not high.But because the RSSI algorithm is simple, low cost, a lot of wireless communication module provides RSSI values, so the RSSI algorithm is used in many fields.)

In mid-2003, someone in the Lounge asked for a list of time zones. I said that I had one, but the data was in a CodeBase/FoxBase file. Chris Maunder asked if I could retrieve that data and submit it to CodeProject. After procrastinating a few weeks, I decided to go ahead and not only extract the data, but to write a program to edit that data.

本程序可以实现图象的多尺度小波变换.本程序是基于matlab的．简单易用(This procedure can be achieved images of multi-scale wavelet transform. This procedure is based on the matlab. Easy-to-use)

convolution code with matlab and simulink

本程序实现多模态故障检测与故障诊断，用的方法是LPP_GMM_FJ，GMM是用的FJ算法，效果很好(This procedure realize multimodal, fault detection and fault diagnosis method is LPP_GMM_FJ, GMM FJ algorithm is used, the effect is very good )

二次多项式拟合大地水准面，采用matlab编写的，关于拟合出来的图像感觉有些问题。。希望大家指正(Quadratic polynomial fitting geoid, using matlab prepared some questions about the fitting out of the picture feel. . I hope you correct)

this is file for traffic networks benchmarks...

OFDM仿真源代码，在通信系统中应用，调试通过(OFDM modulation system code)

该程序可以把模拟信号通过PCM编码变成数字信号(The program can be an analog signal into a digital signal through the PCM coding)