% Computation of ST-ZCR and STE of a speech signal. % % Functions required: zerocross, sgn, winconv. % % Author: Nabin Sharma % DATe: 2009/03/15 [x,Fs] = wavread('so.wav'); % word is: so x = x.'; N = length(x); % signal length n = 0:N-1; ts = n*(1/Fs); % time for signal % define the window wintype = 'rectwin'; winlen = 201; winamp = [0.5,1]*(1/winlen);
标签： 短时过零率和短时能量
上传时间： 2019-09-23
上传用户：minwenji
Broadband powerline communication systems are continuing to gain significant market adoption worldwide for applications ranging from IPTV delivery to the Smart Grid. The suite of standards developed by the HomePlug Powerline Alliance plays an important role in the widespread deployment of broadband PLC. To DATe, more than 100 million HomePlug modems are deployed and these numbers continue to rise.
上传时间： 2020-05-26
上传用户：shancjb
Never have telecommunications operations and network management been so important. Never has it been more important to move away from practices that DATe back to the very beginning of the telecommunications industry. Building and con- necting systems internally at low cost, on an as - needed basis, and adding software for supporting new networks and services without an overall architectural design will not be cost effective for the future. Defi ning operations and network manage- ment requirements at the 11th hour for new technologies, networks, and services deployments must also change.
标签： Telecommunications Generation Networks Next
上传时间： 2020-05-31
上传用户：shancjb
Some tine ago it become apparent the the first edition of this book was rapidly approaching its sell-by DATe,since many aspects needed revise.There were two obvious courses of action : to forget the whole thing and concentrate my energies on other pursuits such as golf or fishing, or to embark on a new edition.For several reasons Iwas persuaded that a new edition was a worthwhile endeavour;many people had made complimentary remakrs or written complinentary letters about the first edition and I understood that it had become a recommended text for several postgraduate coures.
标签： TMobile Radio Propagation Channel
上传时间： 2020-06-01
上传用户：shancjb
In this book we focus on the basic signal processing that underlies current and future ultra wideband systems. By looking at signal processing in this way we hope this text will be useful even as UWB applications mature and change or regulations regarding ultra wideband systems are modified. The current UWB field is extremely dynamic, with new techniques and ideas being presented at every communications and signal-processing conference. The basic signal-processing techniques presented in this text though will not change for some time to come. Thus, we have taken a somewhat theoretical approach, which we believe is longer lasting and more useful to the reader in the long term than an up-to-the-minute summary that is out of DATe as soon as it is published.
标签： Wideband Signals Systems Ultra 1st
上传时间： 2020-06-01
上传用户：shancjb
Broadband powerline communication systems are continuing to gain significant market adoption worldwide for applications ranging from IPTV delivery to the Smart Grid. The suite of standards developed by the HomePlug Powerline Alliance plays an important role in the widespread deployment of broadband PLC. To DATe, more than 100 million HomePlug modems are deployed and these numbers continue to rise.
上传时间： 2020-06-06
上传用户：shancjb
Software-defined radios (SDRs) have been around for more than a decade. The first complete Global Positioning System (GPS) implementation was described by Dennis Akos in 1997. Since then several research groups have presented their contributions. We therefore find it timely to publish an up-to-DATe text on the sub- ject and at the same time include Galileo, the forthcoming European satellite- based navigation system. Both GPS and Galileo belong to the category of Global Navigation Satellite Systems (GNSS).
标签： A_Software-Defined_GPS_and_Galile o_Receiver
上传时间： 2020-06-09
上传用户：shancjb
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上传时间： 2021-10-22
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常用芯片表贴芯片表贴电阻电容STM封装库AD库（ATIUM PCB封装库）:PCB Library : 常用芯片表贴芯片表贴电阻电容STM封装库AD库（ATIUM PCB封装库）.PcbLibDATe : 2021/5/14Time : 16:14:01Component Count : 463Component Name-----------------------------------------------LC-12-DIPH-300LC-0201LC-0201_CLC-0201_LLC-0201_RLC-0402LC-0402_CLC-0402_LLC-0402_RLC-0402_Rx2LC-0402_Rx4LC-0603LC-0603_CLC-0603_Cx4LC-0603_LLC-0603_LEDLC-0603_RLC-0603_Rx2LC-0603_Rx4LC-0805LC-0805_CLC-0805_LLC-0805_LEDLC-0805_RLC-1206LC-1206_CLC-1206_LLC-1206_RLC-1210LC-1210_CLC-1210_RLC-1806LC-1806_CLC-1806_LLC-1806_RLC-1808LC-1808_CLC-1808_LLC-1808_RLC-1812LC-1812_CLC-1812_LLC-1812_RLC-1825LC-1825_CLC-1825_LLC-1825_RLC-2010LC-2010_CLC-2010_LLC-2010_RLC-2220LC-2220_CLC-2220_LLC-2220_RLC-2225LC-2225_CLC-2225_RLC-2512LC-2512_CLC-2512_LLC-2512_RLC-ABSLC-BGA-14LC-BGA-84_7.5x12.5mmLC-BGA-121LC-BGA-143LC-BR-3LC-BR-6LC-BR-10LC-CASE 017AA-01LC-CASE-A_3216LC-CASE-B_3528LC-CASE-C_6032LC-CASE-D_7343LC-CASE-E_7343LC-CASE-P_2012LC-CASE-R_2012LC-DBLC-DBSLC-DFN-2LLC-DFN-8_3x3mmLC-DFN-8_5x6mmLC-DFN-10_3x3mmLC-DFN-10_EP_3x3mmLC-DIP-4LC-DIP-5LC-DIP-6LC-DIP-7LC-DIP-8LC-DIP-14LC-DIP-16LC-DIP-18LC-DIP-20LC-DIP-24_300milLC-DIP-24_600milLC-DIP-28_300milLC-DIP-28_600milLC-DIP-40LC-DO-15LC-DO-27LC-DO-35LC-DO-41LC-DO-201ADLC-DO-213AALC-DO-213ABLC-DO-218ABLC-DSON-10LC-FBGA-84_9x12.5mmLC-FBGA-96_8x14mmLC-FBGA-256LC-FBGA-272LC-FBGA-289LC-FBGA-484LC-FBGA-780LC-GBJLC-GBULC-GDTs_SMDLC-GDTs_THTLC-HC-49SLC-HC-49SMDLC-HC-49ULC-HTSSOP-32LC-HVMDIPLC-HVQFN-32_5x5x05PLC-HZIP25-P-1.27LC-KBJLC-KBLLC-KBPLC-KBPCLC-KBULC-LBSLC-LFBGA-217LC-LFCSP-8_3x2x05PLC-LFCSP-8_3x3x05PLC-LFCSP-16_4x4x05PLC-LFCSP-20_4x4x05PLC-LFCSP-24_4x4x05PLC-LFCSP-28_5x5x05PLC-LFCSP40_6x6x05PLC-LFCSP56_8x8x05PLC-LGA-8_3x5mmLC-LGA-14_3x5mmLC-LGA-16_3x3mmLC-LGA-16_4x4mmLC-LL-34LC-LL-35LC-LL-41LC-LPCC-148LC-LQFP-32_7x7x08PLC-LQFP-44_10x10x08PLC-LQFP-48_7x7x05P
上传时间： 2021-12-02
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索尼最小CMOS图像传感器IMX415 日本东京索尼公司今年发布一款新型CMOS影像传感器：IMX415，1/2.8 英寸堆叠式4K CMOS影像传感器，刷新全球同类产品的小尺寸纪录； 针对日益扩大的智慧城市相关的市场需求，索尼特别开发了这款新型的应用于安防摄像机的传感器，以满足安防摄像机在防盗、灾难警报、交通监测系统或商业综合体等多种监控应用领域的快速增长需求。目前，在各种场合安装安防摄像机的需求正日益增多，而对于可以安装在任何地方、具有更高图像识别和检测性能的紧凑型安防摄像机的需求也比以往任何时候都要大。未来，用于异常检测和人工智能行为分析的图像识别摄像机的需求也将显著增长。 为了满足这一需求，索尼推出了一系列紧凑型4K CMOS影像传感器，能够同时提供卓越的图像识别和检测性能，以及出色的低光性能表现——这是传统技术难以实现的。索尼丰富的传感器产品线，让人们在多种场景下都能获取高质量图像，从而扩大了安防摄像机的应用范围。IMX415堆叠式CMOS影像传感器采用了索尼独有的高灵敏度，低噪点技术，将像素尺寸缩至1.45平方微米,比前代产品*3缩小约80%，尽管该传感器只有1/2.8英寸，其低光性能却是前代产品的1.5倍*3。缔造出破纪录的 1/2.8英寸堆叠式4K CMOS影像传感器，并具备卓越的低光性能。该传感器采用低噪点电路堆叠式结构，即使在黑暗环境下也可以捕捉到清晰的图像。由于它尺寸小，可适用于多种场景，在安防摄像机应用方面需求量很高。
上传时间： 2021-12-13
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