说明： 介绍了北斗双星定位系统的特点、 功能、 系统组成和工作原理， 说明了北斗有源定位方式在应用方面的局限性.对搞BD无源定位而言，是篇很有用的论文，在此分享。(Introduced Beidou Positioning System features, functions, composition and working principle of the system, indicating the way Beidou active positioning application limitations. Right out BD passive positioning, the paper is very useful articles in this share .)
说明： 射频功放数字预失真技术研究及其FPGA实现，文中介绍了数字预失真的实现架构，介绍了QRD_RLS算法实现的相关CORDIC技术，GIVENS旋转，以及systolic阵等原理(RF power amplifier digital pre-distortion technology and its FPGA implementation, this paper describes the realization of digital pre-distortion framework introduced QRD_RLS relevant CORDIC algorithm implementation techniques, GIVENS rotation, and other systolic array principles)
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
涡街流量计数字信号处理系统的改进与实验 本文针对涡街流量计数字信号处理系统存在的不能测量小流量和易受电磁干扰的问题,对其软硬件方面进行了 改进。重新设计和研制了电荷放大器,提高了灵敏度,增强了适配能力。采取了合理的接地和屏蔽措施,提高了系统的抗干 扰能力。采用去均值和频谱校正的方法,改善了系统的测量精度。编制键盘监控软件,采用状态变量法设计键值分析程序, 实现人机对话功能。进行了液体流量和气体流量的标定实验,结果表明,改进后的数字信号处理系统比常规的流量计信号处 理系统的测量精度高、流程比宽和适配能力强。(Vortex Flowmeter digital signal processing system improvements and experimental In this paper, vortex flowmeter digital signal processing systems can not exist in measuring small flows and vulnerable to electromagnetic interference problems, its hardware and software aspects of the Improvement. To re-design and development of the charge amplifier, increasing sensitivity and enhanced adaptive capacity. Adopted a reasonable grounding and shielding measures to improve the system s anti-stem Interference capability. Used to mean and spectral correction methods to improve the system s measurement accuracy. The preparation of keyboard monitoring software, using state-variable method designed to key analytical procedures, Functions to achieve human-machine dialogue. Were liquid flow and gas flow calibration experiments, the results show that the improved digital signal processing systems than the conventional flow meter signal at Management System s high accuracy, process than the w)
myspace, youku 淘宝网站架构说明书，非常好的东西，希望能帮到大家(myspace, youku Taobao station architecture description, very good things I hope to help you)
收集了几乎全部的高频方波三角波正弦波发生器MAX038及其各种应用论文,对设计多波形信号发生器级有帮助,欢迎下载.(Collected almost all the high-frequency square wave triangle wave sine wave generator and its various applications MAX038 papers on the design Multi-Signal Generator-class help are welcome to download.)
针对DVB-T标准ETSI EN 300 744 V1.5.1,设计了可用于DVB-T接收整机的多速率DDC模块,并在FPGA中仿真实现.在复用数字振荡混频模块的基础上,根据输入信号的不同带宽(6M/8MHz)选择不同的抽取滤波器组完成抽取因子为3或4的多速率处理任务,利用两级半带滤波器(HBF)级联完成4倍抽取滤波,单级奈奎斯特滤波器完成3倍抽取滤波. (For the DVB-T standard ETSI EN 300 744 V1.5.1, designed for DVB-T receiver machine multi-rate DDC module, and the simulation in the FPGA implementation. Numerical oscillation in the complex mixer module, based on the input signals of different bandwidths (6M/8MHz) choose a different group of complete decimation filter extracted factor 3 or 4 of the multi-rate processing tasks, using two half-band filter (HBF) cascade to complete four times decimation filter, single-stage Chennai Nyquist filter to complete three times the decimation filtering.)
FPGA实现FIR抽取滤波器的设计 采用基于分布式思想的方法来设计FIR滤波器。(FPGA realization of FIR decimation filter design ideas based on a distributed approach to design FIR filters.)
适用于音频过采样DAC的插值滤波器的设计 一种通用便携式数字音频系统sigma-delta DAC中的插值滤波器。(Over-sampling DAC for audio interpolation filter design a general-purpose portable digital audio systems in the sigma-delta DAC interpolation filter.)
说明： 地震合成记录的wavelets, contourlets and curvelets比较分析。本文不仅论述了三种方法的原理，而且提出一种联合方法，并且应用于地震信号处理(Synthetic seismic record wavelets, contourlets and curvelets comparative analysis. This article discusses the three methods is not only the principle and proposed a joint approach, and applied to seismic signal processing)
说明： 提供了三套ZigBee兼容的 平台，为我们的客户提供一种 只需要添加应用的解决方案。 所有的三种解决方案都是建立 在CC2420/CC2520上，而且 有很好的共存性。这些兼容的 平台缩短了产品进入市场的时 间，简化了系统设计和ZigBee 终端产品的验证。(Provided three sets of ZigBee-compliant platform, to offer our customers only need to add the application of a solution. All three solutions are built on CC2420/CC2520, but also the co-existence of good. These platform compatible product to shorten time-to-market and simplifies the system design and test ZigBee end-products.)
说明： 一篇关于boosted particle filter的论文，被评为BEST PAPER。(A boosted particle filter on the papers, was named BEST PAPER.)
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.)
( 从太原市公交查询系统建立的必要性出发, 进行了公交查询算法的研究, 主要探讨了包括最短路径查 询及最少花费查询及数据库管理的公交查询系统的实现。 该系统采用了V ISU AL BA S IC 610 为开发工具, M ICRO SO FT A CCESS2003 为后台数据库, 开发了基于太原市公交线路的公交查询系统。具有线路查询、换乘 查询、 站点查询、 数据管理等一系列功能。 ((From the city bus system the need for inquiry, carrying out a public inquiry method of research, focused on the shortest path, including at least inquiries and inquiries and database management to spend the public inquiries system. The system uses a V ISU AL BA S IC 610 for the development of tools, M ICRO SO FT A CCESS2003 as the background database, developed based on the city' s public transportation bus lines inquiry system. with line inquiries, transfer information, site information, a series of functions such as data management.)
Proteus 仿真软件在单片机设计中的应用(摘 要 单片机应用技术所涉及到的实验实践环节比较多，而且硬件投入比较大。在具体的工程实践中，如果因为方案有误而进 行相应的开发设计，会浪费较多的时间和经费。Proteus 仿真软件很好的解决了这些问题，他可以象Protel 一样画好硬件原理图 与KEIL 编程软件结合进行编程仿真调试。)
LY63S-130型垃圾压缩机的设计(LY63S-130 type garbage compressor design)
还有一篇关于音频动态范围压缩的相关珍贵论文，这是一个很实用但是又很少有人关注的领域，希望对大家有帮助！(Have an audio dynamic range compression on the relevance of valuable papers, it is a very pragmatic but also very few areas of concern, and they hope to have everyone help!)
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