frft

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In this paper, we investigate the timing and carrier frequency offset (CFO) synchronization problem in decode and forward cooperative systems operating over frequency selective channels. A training sequence which consists of one orthogonal frequency-division multiplexing (OFDM) block having a tile structure in the frequency domain is proposed to perform synchronization. Timing offsets are estimated using correlation-type algorithms. By inserting some null subcarriers in the proposed tile structure, we propose a computationally efficient subspace decomposition- based algorithm for CFO estimation. The issue of optimal tile length is studied both theoretically and through simulations. By judiciously designing the tile size of the pilot, the proposed algorithms are shown to have better performance, in terms of synchronization errors and bit error rate, than the time-division multiplexing-based training method and the computationally demanding space-alternating generalized expectation-maximization

经典的DOA算法的MATLAB仿真程序，可用于仿真与改进算法进行对比(classical DOA MATLAB )

包含了巴特沃斯滤波器的处理，属于数字信号处理的一部分(Includes the processing of the Butterworth filter, part of the digital signal processing)

使用matlab中的GUI设计的译码器，配有适当的注释，适合初学者。(The GUI design using matlab decoder, with appropriate comments, suitable for beginners.)

拉格朗日插值法和牛顿插值法，matlab软件编程，.m文件(Lagrange interpolation and Newton interpolation, MATLAB software programming,.M file)

Matlab 求声音信号的包络的源代码 使用方法见说明(Matlab for the sound signal envelope of the source code)

matlab /Vc++实例教程，十二章包括附录的相关代码都有。(Matlab/Vc example guides, including Chapter 12 Appendix relevant code.)

一束平面波经过一个相位畸变元件后通过小孔衍射，畸变光束的衍射(After a bunch of plane-wave phase distortion components through the hole diffraction beam diffraction distortion)

雷达信号处理中MTI，用FFT实现MTD， 用FIR滤波器实现MTD。 (Radar signal processing MTI, with FFT to achieve MTD.Realize MTD with FIR filter.)