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57  Articles
1 of 7 pages  |  10  records  |  more records»
Asymmetric Digital Subscriber Line (ADSL) system is an access technology that enables communication of data, voice and video simultaneously on copper access media. Data communication can not be avoided from the noise, not least ADSL systems are experienci... see more
ADSL |  AWGN |  BER |  QPSK |  SNR
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Asymmetric Digital Subscriber Line (ADSL) system is an access technology that enables communication of data, voice and video simultaneously on copper access media. Data communication can not be avoided from the noise, not least ADSL systems are experienci... see more
ADSL |  AWGN |  BER |  QPSK |  SNR
Quadrature Phase-Shift Keying (QPSK) modulation technique is one of the most widely used modulation scheme in modern digital communication system; it provides high performance on bandwidth efficiency. In this paper, the model of QPSK modulator and demodul... see more

???????? ????????? ???????? ? ???????? ????????? ??’???? ? ???????????? ??????????? ??????? ??????? ??? ????????? ????????? ?????. ???? ??? ?????? ??????????? ???????? ???????? ? ??????? ???? ?????? ????????? ??’???? ? ??????. ???? ????, ? ??????? ? ?????... see more

En este trabajo de investigación se desarrolla un sistema de radio frecuencia (RF) bajo modulación QPSK para la transmisión de señales biomédicas como EMG y ECG en la banda de los 2 GHz. El sistema se implementa mediante un transceptor que opera en aplica... see more


This paper analyzes the comparison of data communications using GEO satellites between C-band and Ka-band frequencies in Indonesia which has a tropical rain climate. The data communication uses QPSK modulation on the path of four earth stations by paying ... see more

??????? ? ???????? ?????? ?????????? ??????????? ?????????? ???????? ???????. ? ??? ?????? ???????? ???? ?????????? ????’?????? ?????? ???????? ??????? ???????????? ????? ????????????? ????? ??’????. ??????? ????????? ?????? ??????????? ? ??????? ????????... see more

1 of 7 pages  |  10  records  |  more records»