A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
Filters
Design and implementation of the 1024-QAM RF transmission system for UHD cable TV broadcasting
2014
16th International Conference on Advanced Communication Technology
Preserved Fulltext
In this paper, we provide a detail description of UHDTV(Ultra High Definition TV) 1024-QAM cable transmission system design which includes functional description of modem components, simulation results ...
This paper presents the 1024-QAM transmission system design, implementation and performance for providing UHDTV services over HFC network. ...
But in the severe multipath channel condition, high order QAM performance limitation by distortion of input symbol constellation and increased probability errors, leading to error propagation in DFE. ...
doi:10.1109/icact.2014.6779173
fatcat:d6rf73pm5nac3lekq2c7d24yyu
Guest Editorial
1987
IEEE Journal on Selected Areas in Communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
Since June, 1984, he has been working for Karkar Electronics on 64-QAM and 256-QAM digital modem designs. Dr. ...
latest 64-QAM digital radio is being outmoded by the developments in the new 256-QAM digital radio. ...
He also took active part in the development of 256-QAM digital modem applications and multiband parabolic antenna systems for analog and digital transmission. ...
doi:10.1109/jsac.1987.1146563
fatcat:ucgxwtkuwjcnfpwnzjcdg3vcu4
Page 265 of SMPTE Motion Imaging Journal Vol. 104, Issue 5
[page]
1995
SMPTE Motion Imaging Journal
Preserved Fulltext
The Internet Archive has digitized a microfilm copy of this work. It may be possible to borrow a copy for reading.
Figure 8 shows the performance of the COFDM 64-QAM system under different non- linear distortions (a hard amplitude clipper was used). ...
Bucher, “Simulation of Multipath Fading/Ghosting for Analog and Digital Television Transmission in Broadcast Channels,” JEEE Trans. on Broadcasting, 38:256-262, Dec. 1992.
18. T. Liu and C. B. ...
High rate acoustic link for underwater video transmission
2003
Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
A high bit rate acoustic link for video transmission over an underwater channel is investigated. ...
While this rate is still above the limit of commercially available acoustic modems, prototype acoustic modems based on phase coherent modulation / detection have demonstrated successful transmission up ...
Harry Maxfield of RD Instruments for supplying the transducers used in the experiments. ...
doi:10.1109/oceans.2003.178494
fatcat:wxyybhdxwngu5ow7qusc7jlt5e
A Survey on Design and Performance of Higher-Order QAM Constellations
[article]
2020
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
In this work, various QAM constellations are discussed and detailed study of star QAM, XQAM, and HQAM constellations is presented. ...
With this, it can be claimed that the use of the HQAM in various wireless communication systems and standards can further improve the performance targeted for beyond 5G wireless communication systems. ...
In [144] , authors analyzed the performance of 256-QAM over distorted channels by considering amplitude distortions such as linear, parabolic, and sinusoidal characteristics along with group delay. ...
arXiv:2004.14708v1
fatcat:okupeb57cnaa3kjf3gyzhludde
A VLSI architecture for a high-speed all-digital quadrature modulator and demodulator for digital radio applications
1990
IEEE Journal on Selected Areas in Communications
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
variety of high bit-rate digital modem designs using various modulation formats such as M-ary PSK and QAM. ...
The modulator chip can generate any arbitrary signal constellation within a rectangular grid of 256 X 256 points, thus, the all-digital implementation results in a generic chip set suitable for a wide ...
256-QAM. ...
doi:10.1109/49.62829
fatcat:hbjlxkmfyvan3gnn5anm7zhnq4
A Survey on Higher-Order QAM Constellations: Technical Challenges, Recent Advances, and Future Trends
2021
IEEE Open Journal of the Communications Society
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
In this work, various QAM constellations are discussed and detailed study of star QAM, XQAM, and HQAM is presented. ...
Communication system's performance is sensitive to bandwidth, power, cost etc. ...
In [150] , authors analyzed the performance of 256-QAM over distorted channels by considering amplitude distortions such as linear, parabolic, and sinusoidal characteristics along with group delay. ...
doi:10.1109/ojcoms.2021.3067384
fatcat:xx3tpsasevbqjg3ej2vktivqdi
A frequency-agile single-chip QAM modulator with beamforming diversity
2001
IEEE Journal of Solid-State Circuits
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
In order to achieve reliable wireless communication modem function, the single chip all-digital QAM modulator implements various features, including high data rates with bandwidth efficiency, flexibility ...
Index Terms-Antenna beamforming diversity, DDFS, FIR filter, half band filter, frequency agility, modulator, Nyquist filter, polynomial interpolator, QAM, variable rate interpolator, VLSI, wireless modem ...
In this design, six different QAM modulation constellations from 4 to 256 are implemented to accommodate adaptive bit allocation. ...
doi:10.1109/4.910478
fatcat:zlvumjq3preu3ejwbkketxjigy
Performance Analysis, Characteristics, and Simulation of Digital QAM
2017
European Journal of Electrical Engineering and Computer Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
It is compared the theoretical and simulated Bit Error Rate (BER) for 16-QAM with Gray coding in an AWGN channel. Some general conclusions are also cited. ...
This paper presents the various fields where QAM can be implemented, describes modulator/demodulator block diagrams for transmitters as well as receivers, provides an introduction of certain performance ...
In example, for domestic broadcast applications 64 QAM and 256 QAM are often encountered in digital cable television and cable modem applications. ...
doi:10.24018/ejece.2017.1.1.3
fatcat:yet75sru2vdjvhnvjgnuogxrfm
On Performance of Multicast Delivery with Fixed WiMAX Telemedicine Networks Using Single-Carrier Modulation
2010
Journal of Advances in Information Technology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
In this paper, we analyze the performance of QAM schemes used in a fixed WiMAX system that supports multicast distribution of .real-time traffic for healthcare services by evaluation of system performance ...
Results are presented by comparing the distribution of video data using QPSK and 16-QAM and bandwidth utilization is calculated for continuous data transmission in remote patient monitoring. ...
Compensation for distortion over Rayleigh fading channels has been studied [2] . ...
doi:10.4304/jait.1.1.59-65
fatcat:i7cblmti55cw5iiv4cgibbybm4
A Comprehensive Analysis of M-ary PSK and M-ary QAM Schemes
2021
Asian Journal of Research in Computer Science
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
Despite the advantages of these schemes, the traditional channel impairments, such as noise, can affect their performance. ...
The result shows that, among the three modulation schemes compared, QAM has the best BER performance with minimal energy consumption. ...
Other forms of QAM have specified relevance. 64-QAM and 256 are used in digital cable television and cable modem [6, 18] . ...
doi:10.9734/ajrcos/2021/v7i330183
fatcat:mfrfzbfrvzca5ofabkhgm2nfvi
Ultimate capacity of a laser diode in transporting multichannel M-QAM signals
1997
Journal of Lightwave Technology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
In this paper, we investigate the ultimate M-ary quadrature amplitude modulated (M -QAM) channel capacity of a laser diode which is limited by the laser clipping induced nonlinear distortions. ...
As regard to the ultimate capacity of a down-stream laser diode with a RIN level of 0135 dB/Hz, we found that as high as 600 and 128 channels of 64-QAM and 256-QAM signals (equivalent to 3600 and 1152 ...
128 channels of 256-QAM signals (6 128 54 822 MHz). ...
doi:10.1109/50.633590
fatcat:aqonrli2pbhrhic3cf4w4xd3fi
FPGA Implementation of a Configurable Complex Blind Adaptive Equalizer
2007
2007 IEEE International Symposium on Signal Processing and Information Technology
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
The design realizes the CMA, MMA, RMMA, and RMDA error signals, while it achieves channel equalization for square QAM signals up to 256-QAM. ...
The design can be configured to achieve cma ' Y ) ) channel equalization for square QAM signals up to 256-QAM e C = YR I by means of the constant modulus algorithm (CMA), multimod-+ j YI (n) (_-2 _ y2 ...
doi:10.1109/isspit.2007.4458069
fatcat:4yuaybfwc5azxcjhcmjvmkglee
A hierarchical approach to the classification of digital modulation types in multipath environments
2001
Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2013; you can also visit the original URL.
The file type is application/pdf.
To compensate for this distortion, modem receivers use signal equalization extensively, in an attempt to undo the effects of the propagation channel. ...
In real world situations the transmission channel is a critical factor that may cause unrecoverable distortions on the signal, especially in higher order digital modulations, such as in 256-QAM, where ...
doi:10.1109/acssc.2001.987737
fatcat:adqpuxw42jfczpk7qzqjrhe2hy
A configurable fractionally-spaced blind adaptive equalizer for QAM demodulators
2007
Digital signal processing (Print)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is application/pdf.
equalization for square QAM signals up to 256-QAM. ...
The implementation operates at a maximum symbol frequency of 8.055 MBaud, which is comparable to recent QAM equalizer designs for cable modems. ...
The signal distortion introduced by the channel is removed by the complex equalizer, which estimates the channel inverse. ...
doi:10.1016/j.dsp.2006.10.009
fatcat:a6ge3i5cbvaxvdtjotvdnux3du
« Previous
Showing results 1 — 15 out of 303 results