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EV-DO

EVDO(EV-DO)實際上是三個單詞的縮寫:Evolution(演進)、DataOnly。其全稱為:CDMA20001xEV-DO,是CDMA20001x演進(3G)的一條路徑的一個階段。這一路徑有兩個發(fā)展階段,第一階段叫1xEV-DO,即“DataOnly”,它可以使運營商利用一個與IS-95或CDMA2000相同頻寬的CDMA載頻就可實現(xiàn)高達2.4Mbps的前向數(shù)據(jù)傳輸速率,已被國際電聯(lián)ITU接納為國際3G標準,并已具備商用化條件。第二階段叫1xEV-DV。1xEV-DV意為“DataandVoice”,它可以在一個CDMA載頻上同時支持話音和數(shù)據(jù)。
  • 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

    標簽: engineering code-what chances reverse

    上傳時間: 2014-01-17

    上傳用戶: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

    標簽: synthesizable microcontro Synthetic PIC

    上傳時間: 2013-12-22

    上傳用戶:妄想演繹師

  • 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”.

    標簽: anti-aliasing performing different sample

    上傳時間: 2014-01-11

    上傳用戶:haohaoxuexi

  • 復接入

    復接入,B/W雙用戶使用直接擴頻序列 % >>>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

    標簽:

    上傳時間: 2014-11-22

    上傳用戶: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.

    標簽: facilities streams provide Output

    上傳時間: 2013-12-17

    上傳用戶: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.

    標簽: essentially algorithm describe suitably

    上傳時間: 2017-03-02

    上傳用戶: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.

    標簽: introduce messenger Instant fledged

    上傳時間: 2014-12-05

    上傳用戶:電子世界

  • 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

    標簽: for complete reconize network

    上傳時間: 2017-03-09

    上傳用戶:qq21508895

  • Very simple USB 1.1 PHY. Includes all the goodies: serial/parallel conversion, bit stuffing/unstuff

    Very simple USB 1.1 PHY. Includes all the goodies: serial/parallel conversion, bit stuffing/unstuffing, NRZI encoding decoding. Uses a simplified UTMI interface. Currently doesn t do any error checking in the RX section [should probably check for bit unstuffing errors]. Otherwise complete and fully functional. There is currently no test bench available. This core is very simple and is proven in hardware. I see no point of writing a test bench at this time.

    標簽: conversion Includes parallel stuffing

    上傳時間: 2017-03-11

    上傳用戶:hn891122

  • The Kalman filter is a set of mathematical equations that provides an efficient computational [recu

    The Kalman filter is a set of mathematical equations that provides an efficient computational [recursive] means to estimate the state of a process, in a way that minimizes the mean of the squared error. The filter is very powerful in several aspects: it supports estimations of past, present, and even future states, and it can do so even when the precise nature of the modeled system is unknown.

    標簽: computational mathematical equations efficient

    上傳時間: 2014-06-02

    上傳用戶:yd19890720

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