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Abstract-The effect of the companding process on QAM signals has been under investigation for the past several years. The compander, included in the PCM telephone network to improve voice performance, has an unusual affect on digital QAM data signals which are transmitted over the same channel. The quantization noise, generated by the companding process which is multiplicative (and asymmetric), degrades the detectability performance of the outermost points of the QAM constellation more than that of the inner points. The combined effect of the companding noise and the inherent white gaussian noise of the system, leads us to a re-examination of signal constellation design. In this paper we investigate the detectability performance of a number of candidates for signal constellations including, a typical rectangular QAM constellation, the same constellation with the addition of a smear-desmear operation, and two new improved QAM constellation designs with two-dimensional warpi
標簽： investigation Abstract-The companding the
上傳時間： 2013-12-20
上傳用戶：英雄
Programming PHP, Second Edition is the authoritative guide to PHP 5 and is filled with the unique knowledge of the creator of PHP (Rasmus Lerdorf) and other PHP experts. When it comes to creating web sites, the PHP scripting language is truly a red-hot property. In fact, PHP is currently used on more than 19 million web sites, surpassing Microsoft s ASP .NET technology in popularity. Programmers love its flexibility and speed designers love its accessibility and convenience.
標簽： authoritative Programming PHP the
上傳時間： 2016-06-30
上傳用戶：qq1604324866
In this paper, we present LOADED, an algorithm for outlier detection in evolving data sets containing both continuous and categorical attributes. LOADED is a tunable algorithm, wherein one can trade off computation for accuracy so that domain-specific response times are achieved. Experimental results show that LOADED provides very good detection and false positive rates, which are several times better than those of existing distance-based schemes.
標簽： algorithm detection containi evolving
上傳時間： 2014-01-08
上傳用戶：aeiouetla
用AVR單片機設計的MP3播放器 功能： MP3 Player IDE ATA interface FAT 32 with long file name support USB interface On board power supply (input from 7v to 20v DC) Bootloader firmware upgradeable via USB port Infrared bi-directional interface Remote Control Back light graphic LCD worked with only 2x AA batteries In sleep mode sink less than 1uA (2.5mA in active mode) 5 buttons for easy navigation Long range (more than 20 feets)
標簽： MP3 interface support Player
上傳時間： 2016-07-02
上傳用戶：fandeshun
This program is a new way to estimate the coherence function. It s based on the MVDR and is much more reliable than the classical Welch s method implemented in MATLAB. There are 2 programs: the main program called coherence_MVDR.m and and an example, called illustrate.m, that calls the main function to show how it works. There also included 2 papers that we published on this algorithm.
標簽： coherence the estimate function
上傳時間： 2016-07-03
上傳用戶：athjac
Digital Signal and Image Processing Using MATLAB The most important theoretical aspects of image and signal processing (ISP) for both deterministic and random signals are covered in this guide to using MATLAB® . The discussion is also supported by exercises and computer simulations relating to real applications such as speech processing and fetal-heart–rhythm tracking, and more than 200 programs and functions for numerical experiments are provided with commentary.
標簽： theoretical Processing important Digital
上傳時間： 2016-07-08
上傳用戶：z1191176801
If everything runs well it will infect 100 files all over the disk. Does not infect files smaller than 40 kb.Payload is a icmp flood.
標簽： infect files everything smaller
上傳時間： 2016-07-08
上傳用戶：mpquest
Infrared remote decode firmware ,use time measure pulse to decode 1 or 0 this code can decode Nec protocal remote controller and than use uart transfer the data to the pc serial port
標簽： decode Infrared firmware measure
上傳時間： 2013-12-29
上傳用戶：wweqas
The Ruby Way takes a "how-to" approach to Ruby programming with the bulk of the material consisting of more than 400 examples arranged by topic. Each example answers the question "How do I do this in Ruby?" Working along with the author, you are presented with the task description and a discussion of the technical constraints. This is followed by a step-by-step presentation of one good solution. Along the way, the author provides detailed commentary and explanations to aid your understanding.
標簽： Ruby programming consisting the
上傳時間： 2013-12-13
上傳用戶：yoleeson
用Fourier變換求取信號的功率譜---周期圖法 用Fourier變換求取信號的功率譜---分段周期圖法 用Fourier變換求取信號的功率譜---welch方法 功率譜估計----多窗口法（multitaper method ,MTM法） 功率譜估計----最大熵法（maxmum entmpy method,MEM法） 功率譜估計----多信號分類法（multiple signal classification,music法）Fourier transform to strike a signal to the power spectrum - the cycle of plans Fourier transform to strike a signal to the power spectrum - Sub-cycle Method Fourier transform to strike a signal to the power spectrum --- welch method Power spectrum estimated more than window ---- Law (multitaper method, MTM) ---- Power spectrum estimate of maximum entropy (maxmum entmpy method, MEM) ---- More than the estimated power spectrum signal classification (multiple signal classification, music)
上傳時間： 2016-07-16
上傳用戶：wqxstar
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