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EV-DO

EVDO(EV-DO)实际上是三个单词的缩写:Evolution(演进)、DataOnly。其全称为:CDMA20001xEV-DO,是CDMA20001x演进(3G)的一条路径的一个阶段。这一路径有两个发展阶段,第一阶段叫1xEV-DO,即“DataOnly”,它可以使运营商利用一个与IS-95或CDMA2000相同频宽的CDMA载频就可实现高达2.4Mbps的前向数据传输速率,已被国际电联ITU接纳为国际3G标准,并已具备商用化条件。第二阶段叫1xEV-DV。1xEV-DV意为“DataandVoice”,它可以在一个CDMA载频上同时支持话音和数据。
  • The NCTUns network simulator and emulator is developed at NCTU, Taiwan. Its predecessor is the Harva

    The NCTUns network simulator and emulator is developed at NCTU, Taiwan. Its predecessor is the Harvard network simulator (invented by Prof. S.Y. Wang in 1999). By using a novel simulation methodology, it can do several tasks that traditional network simulators cannot easily do.

    标签: predecessor developed simulator emulator

    上传时间: 2014-12-02

    上传用户:txfyddz

  • 此函数把SPI的读写功能集成在一块,传递的val既是向SPI写的数据,也是从SPI读取的数据,只需要在执行读或写之前把MCU的I/O脚设置成相应的输出或输入即可。(因为在大部分应用中,是把SPI的DI

    此函数把SPI的读写功能集成在一块,传递的val既是向SPI写的数据,也是从SPI读取的数据,只需要在执行读或写之前把MCU的I/O脚设置成相应的输出或输入即可。(因为在大部分应用中,是把SPI的DI和DO相连并用MCU的一个IO口来读写)。

    标签: SPI MCU val 数据

    上传时间: 2013-12-27

    上传用户:l254587896

  • A "code-what"? Unless you have spent some time working in the area of reverse engineering, chances a

    A "code-what"? Unless you have spent some time working in the area of reverse engineering, chances are you have not heard of the term "codecave" before. If you have heard of it, you might not have read a clear definition of it or quite understand what it is or why it is useful. I have even asked seasoned assembly programmers about the term before and most of them had not heard of it. If it is new to you, do not worry, you are not the only one. It is a term that is scarcely used and is only useful in a reverse engineering context. Furthermore, is it "codecave" or "code cave"? I am not quite sure, but I will try my best to refer to it consistently as a "codecave". A space may sneak in there from time to time

    标签: engineering code-what chances reverse

    上传时间: 2014-01-17

    上传用户:hn891122

  • The Synthetic PIC Verion 1.1 This a VHDL synthesizable model of a simple PIC 16C5x microcontro

    The Synthetic PIC Verion 1.1 This a VHDL synthesizable model of a simple PIC 16C5x microcontroller. It is not, and is not intended as, a high fidelity circuit simulation. This package includes the following files. Note that the license agreement is stated in the main VHDL file, PICCPU.VHD and common questions are answered in the file SYNTHPIC.TXT Files: README.TXT This file.. SYNTHPIC.TXT Questions and Answers PICCPU.VHD Main processor VHDL file PICALU.VHD ALU for the PICCPU PICREGS.VHD Data memory PICROM.VHD Program memory (created by HEX2VHDL utility) PICTEST.VHD Simple test bench I used to do testing (optional) PICTEST.CMD My Viewlogic ViewSim command file (again, optional) TEST1.ASM First program I assembled and ran on it. TEST2.ASM Another test program.. TEST3.ASM Yet another.. TEST4.ASM Yet another.. TEST5.ASM Yet another.. TEST6.ASM Yet another.. HEX2VHDL.CPP Utility for converting

    标签: synthesizable microcontro Synthetic PIC

    上传时间: 2013-12-22

    上传用户:妄想演绎师

  • This sample shows different ways of performing anti-aliasing - both by using only the native hardwa

    This sample shows different ways of performing anti-aliasing - both by using only the native hardware AA support, and by mixing the hardware modes with additional supersampling. There are various ways in which the supersampled image can be down-sampled. The way we do the downsampling in this example is the same technique that was used in 2 of our latest launch demos – “Froggy” and “Adrianne”.

    标签: anti-aliasing performing different sample

    上传时间: 2014-01-11

    上传用户:haohaoxuexi

  • 复接入

    复接入,B/W双用户使用直接扩频序列 % >>>multiple access b/w 2 users using DS CDMA % >>>format is : cdmamodem(user1,user2,snr_in_dbs) % >>>user1 and user2 are vectors and they should be of equal length % >>>e.g. user1=[1 0 1 0 1 0 1] , user2=[1 1 0 0 0 1 1],snr_in_dbs=-50 % >>>or snr_in_dbs=50 just any number wud do % Waqas Mansoor % NUST , Pakistan

    标签:

    上传时间: 2014-11-22

    上传用户:zl5712176

  • All of Java s Input/Output (I/O) facilities are based on streams, which provide simple ways to read

    All of Java s Input/Output (I/O) facilities are based on streams, which provide simple ways to read and write data of different types. Java provides many different kinds of streams, each with its own application. The universe of streams is divided into four large categories: input streams and output streams, for reading and writing binary data and readers and writers, for reading and writing textual (character) data. You re almost certainly familiar with the basic kinds of streams--but did you know that there s a CipherInputStream for reading encrypted data? And a ZipOutputStream for automatically compressing data? Do you know how to use buffered streams effectively to make your I/O operations more efficient? Java I/O, 2nd Edition has been updated for Java 5.0 APIs and tells you all you ever need to know about streams--and probably more.

    标签: facilities streams provide Output

    上传时间: 2013-12-17

    上传用户:6546544

  • cordic methods describe essentially the same algorithm that with suitably chosen inputs can be used

    cordic methods describe essentially the same algorithm that with suitably chosen inputs can be used to calculate a whole range of scientific functions including sin, cos, tan, arctan, arcsin, arccos, sinh, cosh, tanh, arctanh, log, exp, square root and even multiply and divide. the method dates back to volder [1959], and due to its versatility and compactness, it made possible the microcoding of the hp35 pocket scientific calculator in 1972. here is some code to illustrate the techniques. ive split the methods into three parts linear, circular and hyperbolic. in the hp35 microcode these would be unified into one function (for space reasons). because the linear mode can perform multiply and divide, you only need add/subtract and shift to complete the implementation. you can select in the code whether to do the multiples and divides also by cordic means. other multiplies and divides are all powers of 2 (these dont count). to eliminate these too, would involve ieee hackery.

    标签: essentially algorithm describe suitably

    上传时间: 2017-03-02

    上传用户:litianchu

  • What I am trying to introduce here is a full fledged Java Instant messenger, which has all the featu

    What I am trying to introduce here is a full fledged Java Instant messenger, which has all the features supplied by commercial messengers like Yahoo or MSN. Although it cannot compared to be in par with those messengers, it is an attempt by me to learn Advanced Java and JNI concepts. The challenges I faced here were often overcome by referring to numerous sites, which nearly zeroes in or completely solved the issues I faced at that point of time. It improved my learning curve and also believe would do the same to you too. Ofcourse, there are some bugs and glitches, which I hope you would excuse. Thanks to anyone who takes the pain to report them or even suggest better way of doing things to me.

    标签: introduce messenger Instant fledged

    上传时间: 2014-12-05

    上传用户:电子世界

  • All the tool for build a network able to reconize any shapes. Very complete, a good base for anythi

    All the tool for build a network able to reconize any shapes. Very complete, a good base for anything you want to do whith acknowledge, and neural network

    标签: for complete reconize network

    上传时间: 2017-03-09

    上传用户:qq21508895