Results 21 to 30 of about 145,584 (294)
Quadrature Amplitude Modulation Division for Multiuser MISO Broadcast Channels [PDF]
IEEE Journal on Selected Topics in Signal Processing, 2016 This paper considers a discrete-time multiuser multiple-input single-output (MISO) Gaussian broadcast channel (BC), in which channel state information is available at both the transmitter and the receivers.
Zheng Dong +3 more
semanticscholar +1 more source
IEEE Photonics Journal, 2014 We experimentally demonstrate a 429.96-Gb/s signal transmission over a 400-km standard single-mode fiber within the 50-GHz grid and successfully achieve spectral efficiency as high as 8.63 bit/s/Hz.
Chao Li +8 more
doaj +1 more source
Известия высших учебных заведений России: Радиоэлектроника, 2023 Introduction. An important task faced by the developers of modern telecommunication systems consists in increasing the noise immunity of signal reception in channels with variable parameters.
M. R. Bibarsov +3 more
doaj +1 more source
IEEE Access, 2021 Opportunistic systems take advantage of the wireless communication channel random behavior, since transmission is made only when fading amplitude is above a threshold value, which is calculated based on a transmission probability.
Nathaly Orozco Garzon +3 more
doaj +1 more source
Increasing the symbol rate in QAM system using a new set of orthonormal basics functions
Journal of Electrical Systems and Information Technology, 2018 This paper proposes a new technique to increase the symbol rate in Quadrature Amplitude Modulation (QAM) using a new set of orthonormal functions. The proposed technique increases the rate of QAM symbols without increasing the bandwidth of the modulated ...
A.Y. Hassan
doaj +1 more source
Comparison of traffic performance of QPSK and 16-QAM modulation techniques for OFDM system
Journal of Telecommunications and Information Technology, 2005 Orthogonal frequency division multiplexing (OFDM) provides better spectral efficiency than frequency division multiplexing (FDM), while maintaining orthogonal relation between carriers; hence traffic is better carried by OFDM than FDM within the same ...
Imdadul Islam, Siddique Hossain
doaj +1 more source
Index Codes for the Gaussian Broadcast Channel Using Quadrature Amplitude Modulation [PDF]
IEEE Communications Letters, 2015 We propose index codes, based on multidimensional QAM constellations, for the Gaussian broadcast channel, where every receiver demands all the messages from the source.
Natarajan Lakshmi Prasad +2 more
semanticscholar +1 more source
IEEE Photonics Journal, 2016 We demonstrate the codesign and cointegration of an ultracompact silicon photonic receiver and a low-power-consumption (155 mW/channel) two-channel linear transimpedance amplifier array.
J. Zhang +10 more
doaj +1 more source
PERFORMANCE ANALYSIS OF MIMO-SPACE TIME BLOCK CODING WITH DIFFERENT MODULATION TECHNIQUES [PDF]
ICTACT Journal on Communication Technology, 2012 MIMO Diversity is the technique which takes the advantage of multipath and mitigates the effect of fading and increases signal strength. Space Time Block code (STBC) is used in Multiple Input Multiple Output (MIMO) system to improve the performance by ...
Shubhangi Chaudhary, A.J. Patil
doaj
On the Asymptotic Performance of Bit-Wise Decoders for Coded Modulation [PDF]
, 2013 Two decoder structures for coded modulation over the Gaussian and flat fading channels are studied: the maximum likelihood symbol-wise decoder, and the (suboptimal) bit-wise decoder based on the bit-interleaved coded modulation paradigm. We consider a 16-
Agrell, Erik +3 more
core +2 more sources