chadongbaohujiexian

Eagle cadsoft library ADE7758 power meter i ade

说明：  Owing to the broad application value of audio watermarking in remote transmission and mobile extraction, it is very important to study watermarking approaches against A/D and D/A conversion. Based on wavelet decomposition and cepstrum technology, an audio watermarking algorithm is proposed where the low-frequency wavelet coefficients are chosen for cepstrum transforming. Then, the obtained cepstrum data shows stable for watermark hiding by the methods of edging data cutting and statistical mean modification. The synchronization is not required in the algorithm. Experimental results show that the proposed algorithm can resist on the attack of A/D and D/A successfully with features of large capacity and zero bit error. It will be helpful for the mobile audio in secure broadcast and management in the

一套能够适合不同类型商品、超强灵活的多功能在线商店系统，为您提供了一个完整的在线开店解决方案(Can be set for different types of goods, super flexible multi-purpose online shop system provides you with a complete online shop solution)

光纤射频传输系统中相干正交频分复用的研究，介绍了系统的结构和性能,是一份很不错的学习材料。(Coherent optical fiber radio transmission system using orthogonal frequency division multiplexing, introduces the system structure and performance, is a very good learning materials.)

最新USB3014 GPIF第二版正式版(the lastest USB3014 GPIF)

充电宝的电路图，给想自己动手的同学们用来学习借鉴(the circuit of power bank)

基于DCT的嵌入式图像编码，是DCT图像编码的经典文章，由EZW算法启发而发表的此文章。(DCT-based embedded image coding, DCT image coding is a classic article, inspired by the EZW algorithm published this article.)

用 Farrow 结构滤波器对并行采样信号进行时间误差校正, 通过 DSPBuilder 软件将设计的滤波器模型转化为硬 件语言, 利于 FPGA 实现(The Farrow filter is used to correct the time error of the parallel sampling signal, and the designed filter model is converted to hard by DSPBuilder software Language, conducive to the realization of FPGA )

该文简要说明了JTIDS 的工作方式 , 从JTIDS 系统的数据模型入手 , 完成了包括RS编码 、 交织编码 、 软扩频 、 MSK 调制 、 跳频 、 跳时在内的整个JTIDS 系统仿真(This paper briefly describes the working mode of JTIDS, starting the JTIDS system data model, including the completion of the entire JTIDS system simulation RS encoding, interleaving encoding, soft spread spectrum, MSK modulation, frequency hopping, hopping, )

说明：  quiz random and acak with php