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least squares description

无线通信中经典的gardner符号同步算法，本人对其性能进行仿真，结果表明gardner同步算法具有优良的跟踪性能和跟踪精度(Communication technology in the classic GARDNER symbol synchronization algorithm, I do simulation results show that the algorithm has excellent tracking performance of the synchronization)

hide message inside image and retrive it from image using dct

高等引用数学的matlab求解的配套程序(matlab code,useful)

说明：  该程序包含st原程序和使用st变换的一个程序，st源程序需要加入matlab的toolbox下，sst程序为自己编写的应用例程，希望对初学者有帮助(St includes the program and use the original procedure st transform a program, st source matlab need to join the toolbox under, sst procedure to prepare the application for their own routine, and they hope to be helpful for beginners)

中文简体转换为繁体,繁体转换为简体中文版。 中文简体转换为繁体,繁体转换为简体中文版。(China CN to China TW)

说明：  通过并行压缩进行二维信号压缩，提出了一种利用并行压缩传感技术对二维信号进行压缩的新方案。根据这个原理，译码器的重新构造可以并行进行。通过对二维信号进行某些排列，可以确保所有列具有大致相同的密度级别，并且可以使用相同的测量矩阵进行采样。这样可以避免二维信号的矢量化，从而大大减小测量矩阵的尺寸。我们证明，如果排列良好，重建均方误差的上限会更紧。为了说明这一方案，我们将其应用于视频压缩并使用不同帧的排列有两种：参考帧的基于Z字形扫描的排列和非参考帧的基于块测试的排列。仿真结果表明，在相同的压缩比下，峰值信噪比比比在无置换情况下可提高3-7db左右。(we propose a new scheme to compress 2D signals using parallel compressed sensing. According to this seheme, the reeonstruction at the decoder can be performed in parallel. By performing certain permutation on a 2D signal, all columns are insured to have approximately the same density level and can be sampled using the same measurement matrix. In this way, vectorization of a 2D signal can be avoided, and thus the size of the measurement matrix can be dramatically reduced. We prove that with a good permutation, we can have a tighter upper bound on reconstruction mean square error. To illustrate this scheme, we apply it to video compression and use two kinds of permutations for different frames: the zigzag-scanbased permutation for reference frames and the block-test-based permutation for non-reference frames. Simulation results show that under the same compression ratio, the peak signal-to-noise ratio can be improved by approximately 3-7 dB compared to the case without permutation.)

计算给定的传感器加速度信号的一阶香农熵，可改变信号分段数以改变熵值(calculate the signal s Shannon entropy)

cdma2000的前向业务仿真程序，包含卷积交织，扰码，扩频等模块(cdma2000 emulator)

此程序可用于实现基于神经网络的工程性能预测。(this procedure can be used to achieve based on neural network projects performance prediction.)