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Design and implementation of the 1024-QAM RF transmission system for UHD cable TV broadcasting

Sung-Hoon Kim, Jinsoo Choi, Jinwoong Kim, Md. Sazzad Hossen, Ki-Doo Kim
2014 16th International Conference on Advanced Communication Technology  
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

J. Huang, K. Kohiyama, A. Leclert, F. Siebelink
1987 IEEE Journal on Selected Areas in Communications  
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  
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

C. Pelekanakis, M. Stojanovic, L. Freitag
2003 Oceans 2003. Celebrating the Past ... Teaming Toward the Future (IEEE Cat. No.03CH37492)  
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]

Praveen Kumar Singya, Parvez Shaik, Nagendra Kumar, Vimal Bhatia
2020 arXiv   pre-print
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

H. Samueli, B.C. Wong
1990 IEEE Journal on Selected Areas in Communications  
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

Praveen Kumar Singya, Parvez Shaik, Nagendra Kumar, Vimal Bhatia, Mohamed-Slim Alouini
2021 IEEE Open Journal of the Communications Society  
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

Kyung-Ho Cho, H. Samueli
2001 IEEE Journal of Solid-State Circuits  
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

Nikolaos Voudoukis
2017 European Journal of Electrical Engineering and Computer Science  
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

Bernard Fong, Guan Yue Hong
2010 Journal of Advances in Information Technology  
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

Anas Tukur Balarabe, Ahmad Rufa'i, Zahriya Lawal Hassan, Muhammad Bello Aliyu
2021 Asian Journal of Research in Computer Science  
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

Pi-Yang Chiang, W.I. Way
1997 Journal of Lightwave Technology  
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

Kevin Banovic, Mohammed A.S. Khalid, Esam Abdel-Raheem
2007 2007 IEEE International Symposium on Signal Processing and Information Technology  
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

G. Hatzichristos, M.P. Fargues
2001 Conference Record of Thirty-Fifth Asilomar Conference on Signals, Systems and Computers (Cat.No.01CH37256)  
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

Kevin Banović, Mohammed A.S. Khalid, Esam Abdel-Raheem
2007 Digital signal processing (Print)  
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
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