BP_for_4

ber for bpsk modulation in ofdm channel

to find pitch record and play signal

Particle Sworm Optimization algorithms

在OFDM系统 中，宽带信道被分割相互重叠的窄带子信道，如果各子信道 的带宽比信道的相干带宽要小，那么信号传输就有可能在无 频率选择性衰落或者平坦衰落的信道进行。(In OFDM system The wideband channel is divided into narrowband sub-overlapping, if each sub- The bandwidth is less than the coherence bandwidth of the channel, the signal transmission is possible without Frequency selective fading or flat fading channels.)

说明：  自写Matlab的FFT代码，供分享，仅供参考。(Write Matlab FFT code, for sharing, for reference only.)

this is a matlab cod for image processing.

对图像进行预处理，主要的预处理是通过Matlab软件对图像进行直方图均衡化、增加对比度等操作(Nogata will increase the degree of balancing operation, etc.)

Exponential Decay Signal

说明：  建立并绘制任意信号的模糊函数。已在巴克码，线性调频，脉冲信号中测试过。(This program estimates and plots the ambiguity function for any signals. I have tested it for the Barker code, chirp signal, pulse signal. for good results the length of the input vector (Ut)should be more than 7. Example- a rectangular pulse should be described as[1 1 1 1 1 1 1]. Please, give your suggestions. it is made with the help of "xcorr" function (Author: R. Losada) in MATLAB and Ilia Iliev from TU-Sofia )

simple recurrent networks