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
audio process audio proce
上傳時間： 2016-06-21
上傳用戶：talenthn
可在Intel x86上執行的最小OS,完全用組語撰寫 可做DISK IO,process Scheduling...等
標簽： Scheduling process Intel DISK
上傳時間： 2013-12-18
上傳用戶：熊少鋒
this book mainly shows us how to process digital inmages by Visual C
標簽： digital inmages process Visual
上傳時間： 2014-01-02
上傳用戶：cx111111
以上代碼設置不了系統時間的原因：因為date并非是一個實際進程..所以process沒辦法返回。。 如果真要那種設的話。你需要建一個文件。。用文件來設時間。。因為文件是一個真正的進程
上傳時間： 2014-01-20
上傳用戶：dragonhaixm
A book describing a overall process of developing Eclipse RCP proce
標簽： describing developing Eclipse overall
上傳時間： 2014-01-24
上傳用戶：66666
Behavior Analysis and Game Theory Modeling in a Peer Code Review process - v1.doc
標簽： Behavior Analysis Modeling process
上傳時間： 2016-08-19
上傳用戶：haohaoxuexi
This file contains a summary of what you will find in each of the files that make up your process application.
標簽： contains process summary files
上傳時間： 2014-01-25
上傳用戶：wang0123456789
introduced the filter design process in TI s DSP, Include some real example for filter design
標簽： filter design introduced Include
上傳時間： 2016-09-05
上傳用戶：努力努力再努力
This research project evaluates startup times of the linux boot process from power-on until user login. Time consuming parts of the boot process are investigated and methods how to speed up the whole process are discussed.
標簽： evaluates research power-on project
上傳時間： 2013-12-18
上傳用戶：sqq
