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shortening-signal-to-noise

  • Abstract-The effect of the companding process on QAM signals has been under investigation for the p

    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

  • Digital Signal and Image Processing Using MATLAB The most important theoretical aspects of image an

    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

  • This chapter contains sample programs for determining capacity. The reader is advised to go through

    This chapter contains sample programs for determining capacity. The reader is advised to go through the coding. The file "capacity_water.m" is for measuring the waterfilling capacity. It should be made to work with a file similar to "capacity_plot_main.m". The latter file deals with all the other capacity plots given in the book in Chapter 2. All programs are verified with MATLAB versions 6.0 and above with signal processing and communications toolboxes.

    標簽: determining capacity contains programs

    上傳時間: 2016-08-24

    上傳用戶:yph853211

  • he algorithm is equivalent to Infomax by Bell and Sejnowski 1995 [1] using a maximum likelihood form

    he algorithm is equivalent to Infomax by Bell and Sejnowski 1995 [1] using a maximum likelihood formulation. No noise is assumed and the number of observations must equal the number of sources. The BFGS method [2] is used for optimization. The number of independent components are calculated using Bayes Information Criterion [3] (BIC), with PCA for dimension reduction.

    標簽: equivalent likelihood algorithm Sejnowski

    上傳時間: 2016-09-17

    上傳用戶:Altman

  • The TMS320C54x, TMS320LC54x, and TMS320VC54x fixed-point, digital signal processor (DSP) families (

    The TMS320C54x, TMS320LC54x, and TMS320VC54x fixed-point, digital signal processor (DSP) families (hereafter referred to as the ’54x unless otherwise specified) are based on an advanced modified Harvard architecture that has one program memory bus and three data memory buses. These processors also provide an arithmetic logic unit (ALU) that has a high degree of parallelism, application-specific hardware logic, on-chip memory, and additional on-chip peripherals. These DSP families also provide a highly specialized instruction set, which is the basis of the operational flexibility and speed of these DSPs.

    標簽: TMS 320 fixed-point processor

    上傳時間: 2013-12-27

    上傳用戶:宋桃子

  • As you have learnt that sleep( )/usleep()/nanosleep() are not good to delay a process. Timers can pr

    As you have learnt that sleep( )/usleep()/nanosleep() are not good to delay a process. Timers can provide more accurate time control in applications. In this lab, you will explore POSIX timers and signal programming, experience the timer drift. The primary focus of this lab will be "time". The experiment will show you several methods to measure time in your applications.

    標簽: nanosleep process Timers learnt

    上傳時間: 2013-12-19

    上傳用戶:huyiming139

  • The MEASURE program uses the analog inputs of the P89LPC935 to implement a datalogger. This example

    The MEASURE program uses the analog inputs of the P89LPC935 to implement a datalogger. This example shows how you can use signal functions in uVision to simulate a signal coming into one of the analog inputs of the P89LPC935 controller.

    標簽: datalogger implement the MEASURE

    上傳時間: 2016-12-03

    上傳用戶:songrui

  • Description The MUSIC algorithm, proposed by Schmidt, first estimates a basis for the noise subspace

    Description The MUSIC algorithm, proposed by Schmidt, first estimates a basis for the noise subspace and then determines the peaks the associated angles provide the DOA estimates. The MATLAB code for the MUSIC algorithm is sampled by creating an array of steering vectors corresponding to the angles in the vector angles.

    標簽: Description algorithm estimates proposed

    上傳時間: 2013-12-08

    上傳用戶:hgy9473

  • ECE345, Visual-to-Audio Electronic Travel Aid Code for TM320C54x (v2a.asm) download This project

    ECE345, Visual-to-Audio Electronic Travel Aid Code for TM320C54x (v2a.asm) download This project involves the design and implementation of a audio synthesis device that converts moving images into audio signals. The system is built on a TM320C54x DSP with interface to an IMAQ camera module via the serial port on a PC. Brief description: A LabVIEW VI acquires an image from the IMAQ camera module. It quantizes the image into a 5x5, 3-bit image, and sends the data to the TM320C54x DSP via a serial port. The TM320C54x DSP constructs a 64-tap FIR by combining a series of 64-tap head related transfer functions (HRTF) according to the incoming data, and then filters an input audio signal with this FIR filter, in effect creating a correspondence between the filtered signal and the original image.

    標簽: Visual-to-Audio Electronic download project

    上傳時間: 2017-02-01

    上傳用戶:笨小孩

  • This document describes how to switch to and program the unisersal serial bus (USB) analog phase-lo

    This document describes how to switch to and program the unisersal serial bus (USB) analog phase-locked loop (APLL) on the C5506/C5507/C5509A devices. Example assembly programs for programming and switching to and from the APLL are also provided in the attached zip file. It is assumed that the reader is familiar with the use and operation of the C5506/C5507/C5509A USB digital phase-locked loop (DPLL) and C55x™ Digital Signal Processor (DSP) IDLE procedures.

    標簽: describes unisersal document phase-lo

    上傳時間: 2014-01-13

    上傳用戶:hustfanenze

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