noise_estimation

A system simulation environment in Matlab/Simulink of RFID is constructed in this paper. Special attention is emphasized on the analog/RF circuit.Negative effects are concerned in the system model,such as phase noise of the local oscillator,TX-RX coupling,reflection of the environment, AWGN noise,DC offset,I/Q mismatch,etc.Performance of the whole system can be evaluated by changing the coding method,parameters of building blocks,and operation distance.Finally,some simulation results are presented in this paper.

pid自适应控制器学习和程序大家学习，很好用的(请求权)

在调制信道下以sin函数为载波的BPSK的调制与解调程序，及误码率曲线(Channel in the modulation of the carrier to the sin function for BPSK modulation and demodulation process, and BER curves)

如何解决跳频多用户复用体系中的多用户检测问题？包括正交跳频序列的产生 多用户检测方案的设计(multi-user detection ,orthogonal frequency.)

这是用matlab工具箱解决热传导微分方程的一个实例，这里用正六边形、圆形、矩形的三个算例，同时画出来了图像表示温度分布(you can use it to solve the equation and make a picture with matlab,it s easy and straight)

calculates the fibonacci serial of a number

常用Matlab函数说明文档。收录常用全部函数。(Matlab function commonly used documentation. Indexed all commonly used functions.)

MATLAB 有约束信赖域算法，以四元多项式为算例 适用于学习最优化算法的数学专业学生以及其他数值分析课程的同学， 程序清晰，对MATLAB的学习也有很大的帮助，同时程序还有一些不足，读者自己须根据实际问题更正。(MATLAB constrained trust region algorithm to quaternion polynomial example for the application of optimization algorithms in the learning of mathematics students, as well as other courses in numerical analysis of the students, the program clearly and learning to MATLAB is also a great help, but the procedure also There are a number of shortcomings, the reader himself to be corrected in accordance with the actual problem.)

利用时域数据计算数组的RMS值，利用时域数据计算冲击功率谱密度的试验包络条件。(An array of time-domain data using the RMS value of the time-domain data using the power spectral density of the impact test conditions envelope.)

该论文对于目前的无线传感网络节能问题的若干问题进行了认真研究，提出了自己的心的解决方案(The thesis for wireless sensor networks present a number of energy issues conducted a careful study, put forward their own solutions to the hearts of)