fft

resource allocation in cognitive radio

在AWGN信号下，实现pi-4 QPSK调制解调(pi-4 QPSK modulation and demodulation)

有助于学习LS信道估计的编码,以及mmse和LMMSE(ls chanel MMSE CHANEL LMMSE CHANEL)

无线电力传送，无线充电 ，无线传输论文，共振原理抓住电磁波。(Wireless power transmission, wireless charging, wireless transmission papers to seize the resonance theory of electromagnetic waves.)

AMF协议解析工具，适合初学者查看amf协议结构。通过源码来修改测试amf协议(The AMF protocol analysis tool, suitable for beginners View amf protocol structure. Source code to modify the test amf protocols)

opnet Ad hoc仿真源程序,自己构建的路由协议和网络模型(opnet Ad hoc simulation source code, to build its own routing protocol and network model)

By building the generalized Sigmoid function relationship between normalized step-size and the power of error signal, a novel variable step-size NLMS algorithm is proposed. It is proved that the step-size of NPVSS-NLMS changes as the new algorithm does when A=σv -m and B=2. The physical meanings of the parameters in this algorithm are explored. The theoretical analysis illustrate that this algorithm combine the virtues of NPVSS-NLMS and Sigmoid function, and it leads to faster convergence rate and lower final misalignment. The computer simulation results support the theoretical analysis.

qpsk信号插入导频，使用升余弦滤波器，利用导频估计信道，在simulink中仿真(inset pilot in QPSK signal, use square root raised cosine filters in simulink)

在MATLAB上设计一个（2，1，3）卷积编码器和对应的采用维特比译码算法的译码器。编码器的生成多项式为：[1 0 1；1 1 1]。将编码器的输出经过一个高斯白噪声信道的结果作为译码器的输入，观察比较译码器输出和编码器输入，了解卷积码的容错性，并计算译码结果的误比特率.(A convolutional coder (2, 1, 3) and corresponding decoder using Vitby decoding algorithm are designed on MATLAB. The generating polynomial of encoder is: [1 01; 11 1]. The output of the encoder through a Gauss white noise channel as a result of the decoder input, compare the output of the decoder and encoder input, understand the fault tolerance of convolutional code, and calculate the decoding results of bit error rate.)

说明：  简化实频技术，用于微波器件的宽带匹配的Matlab程序。(Simplified Real Frequency Technology)