Results 31 to 40 of about 51,738 (210)
Simulasi Skema Modulasi 1024-QAM dan 4096-QAM pada Sistem Komunikasi Digital
Jurnal Indonesia : Manajemen Informatika dan Komunikasi, 2023 Abstract Quadrature amplitude modulation (QAM) is a modulation scheme used by digital communication systems to obtain high data rates in bandwidth-limited channels. M-ary QAM schemes with M values greater than 256 are currently used by wireless network standards, such as WiFi 6 and WiFi 7 (final standard will be released in 2024), which use the 1024 ...
Danang Maulana Ikhsan, Theophilus Wellem
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Efficient implementation of pilot-aided 32 QAM for fixed wireless and mobile ISDN applications [PDF]
, 2000 This paper presents the design and performance of a pilot tone-aided 32 QAM modem developed for wireless ISDN applications. The modem is capable of transmitting a gross data rate of 70 kbit/s in a 20 kHz channel spacing.
Love, D, Nix, AR, Tariq,, Fahim
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QAM to circular isomorphic constellations [PDF]
2016 8th Advanced Satellite Multimedia Systems Conference and the 14th Signal Processing for Space Communications Workshop (ASMS/SPSC), 2016 Employing high order constellations is inevitable in order to achieve higher spectral efficiency in satellite communi- cation systems. In DVB-S2X standard, constellations with up to 256 points have been included. However, optimizing such high order constellations is a difficult task.
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An unequal error protection scheme for non-binary LDPC using statistical QAM and prioritized mapping [PDF]
Serbian Journal of Electrical Engineering, 2018 Low Density Parity Check (LDPC) codes are among the most popular channel codes used nowadays because of their ability to achieve near channel capacity performances.
Indoonundon Madhavsingh +1 more
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, 2011 This paper is a thorough study of a digital broadcasting system adapted to the small mountainous island of Mauritius. A digital LAN was designed with MPEG-2 signals. The compressed signals were transmitted using DVB-T and QAM modulators.
Armoogum, Sheeba +2 more
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Channel Hardening-Exploiting Message Passing (CHEMP) Receiver in Large-Scale MIMO Systems [PDF]
, 2014 In this paper, we propose a MIMO receiver algorithm that exploits {\em channel hardening} that occurs in large MIMO channels. Channel hardening refers to the phenomenon where the off-diagonal terms of the ${\bf H}^H{\bf H}$ matrix become increasingly ...
Chockalingam, A., Narasimhan, T. Lakshmi
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Symbol error rate analysis for M-QAM modulated physical-layer network coding with phase errors
, 2012 Recent theoretical studies of physical-layer network coding (PNC) show much interest on high-level modulation, such as M-ary quadrature amplitude modulation (M-QAM), and most related works are based on the assumption of phase synchrony.
Huang, Y +3 more
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The Dependence of Galaxy Shape on Luminosity and Surface Brightness Profile [PDF]
, 2005 For a sample of 96,951 galaxies from the Sloan Digital Sky Survey Data Release 3, we study the distribution of apparent axis ratios as a function of r-band absolute magnitude and surface brightness profile type.
Abramson I. S. +11 more
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Exact and approximate log-likelihood ratio of M-ary QAM with two-time dimensions
ICT Express, 2019 A (3×2m)-ary QAM scheme maps a binary symbol into two-consecutive signal points (signal vector). It provides very lower PAPR than the conventional QAM because it removes corner signal points.
Ji-hoon Lee, Hae Chung
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, 2014 Multicarrier CDMA is a multiple access scheme in which modulated QAM symbols are spread over OFDMA tones by using a generally complex spreading sequence. Effectively, a QAM symbol is repeated over multiple tones.
Baligh, Hadi +3 more
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