daixianlvbo

一种间接的估计信号的1.5维谱的方法，1.5维谱可以有效的抑制高斯噪声，加强低频分量。(An indirect estimate of the signal spectrum of 1.5-dimensional method, 1.5-dimensional spectrum can effectively suppress Gaussian noise, to enhance low frequency components.)

一个简化的单边带电台仿真。采用MATLAB编写程序。(A simplified single-sideband radio simulation. Using MATLAB programming.)

使用pid方法控制单级倒立摆，解压后把两个文件放在同一个文件夹里双击nn_pid.m就行了(Pid way to control the use of single-stage inverted pendulum, after extracting the two files in one folder double-click on the list nn_pid.m)

拉哥朗日插值算法的实现,MATLAB编写,仅供参考.(interpolation algorithm implementation, MATLAB prepared for informational purposes only.)

利用平均周期图法的进行功率谱估计，得到信号的频谱幅度。(Use the average periodogram method for power spectrum estimation, be the signal amplitude spectrum.)

matlab中find函数的作用，其实，能看MATLAB的帮助文档，就能够知道大概的意思了(find function in matlab)

[W,L,q]=huffman(P) 为huffman编码函数 P为信源的概率矢量，W为编码返回的码字 L为编码返回的平均码字长度，q为编码效率 ">

The Interleaved Frequency Division Multiple Ac- cess (IFDMA) scheme is based on compression, repetition and subsequent user dependent frequency shift of a modulated signal. Multiple access is enabled by the assignment of overlapping but mutually orthogonal subcarriers to each user. In this paper it is shown that IFDMA can be regarded as unitary precoded OFDMA with interleaved subcarriers. On the other hand, IFDMA is shown to be a CDMA variant with frequency domain orthogonal signature sequences and chip interleaving. Thus, it combines the advantages of single and multi carrier transmission such as low peak to average power ratio, orthogonality of the signals of different users even for transmission over a time dispersive channel and low complexity. Simulation results show the good performance of coded IFDMA transmission over a mobile radio channel for different data rates.

基于matlab的ccir传播模型的路径损耗的仿真的程序，此程序可以在matlab上清晰的看见仿真的图形。(Based on the matlab ccir propagation models of path loss of simulation program, the program can clear to see in matlab simulation graphics.)

说明：  对IS-95前向链路使用matlab仿真 仿真源程序(On the IS-95 forward link simulation using matlab simulation source)