Results 11 to 20 of about 1,531,654 (151)
Detection and Coding Techniques for Fourth Generation Air-Interfaces based on Multicarrier Modulation [PDF]
, 2007 This thesis investigates a number of multiple-access, multiuser detection (MUD) and channel coding methods for the downlink of 4G wireless systems based on multicarrier modulation.
Awad, Akram
core +6 more sources
Low-complexity LSMR equalisation of FrFT-based multicarrier systems in doubly dispersive channels [PDF]
, 2011 The discrete fractional Fourier transform (FrFT) has been suggested to enhance performance over DFT-based multicarrier systems when transmitting over doubly-dispersive channels.
Weiss, Stephan +7 more
core +1 more source
Chirp-based multicarrier modulation [PDF]
, 2012 In this paper we demonstrate that in doubly-dispersive environments, a multicarrier (MC) system based on a fractional Fourier transform (FrFT) can achieve a better concentration of power near the main diagonal of the equivalent channel matrix compared to
Weiss, Stephan +2 more
core +3 more sources
, 2010 Joint transmitter–receiver optimization in generalized multicarrier code-division multiplexing (GMC-CDM) systems is investigated in this paper. The optimization consists of a one-tap post-frequency-domain equalizer (post-FDE) and a one–tap pre-FDE. While
Tingting Liu +5 more
core +2 more sources
An adaptive hidden Markov model for indoor OFDM based wireless systems
Journal of Telecommunications and Information Technology, 2004 Detailed physical layer simulation of orthogonal frequency division multiplexing (OFDM) systems requires programs that execute too slowly due to long coherence time of the indoor mobile channel.
Christos V. Verikoukis
doaj +1 more source
Multicarrier Access and Routing for Wireless Networking
EURASIP Journal on Wireless Communications and Networking, 2005 A multicarrier access and routing system has been proposed for use in wireless networks. Users within each cell access a radio port (RP). All RPs are connected to a radio exchange node (REN) which routes the calls or packets.
Gerakoulis Diakoumis
doaj +2 more sources
A Simplified Scheme of Estimation and Cancellation of Companding Noise for Companded Multicarrier Transmission Systems [PDF]
Radioengineering, 2015 Nonlinear companding transform is an efficient method to reduce the high peak-to-average power ratio (PAPR) of multicarrier transmission systems. However, the introduced companding noise greatly degrades the bit-error-rate (BER) performance of the ...
S. Peng +4 more
doaj
Energy Harvesting for TDS-OFDM in NOMA-Based Underwater Communication Systems
Sensors, 2022 Non-orthogonal multiple access (NOMA) is considered a promising multiple access technique for fifth generation (5G) mobile networks and tactical internet due to its high spectral efficiency.
Hamada Esmaiel, Haixin Sun
doaj +1 more source
EURASIP Journal on Advances in Signal Processing, 2010 Cognitive Radio (CR) systems have been proposed to increase the spectrum utilization by opportunistically access the unused spectrum. Multicarrier communication systems are promising candidates for CR systems. Due to its high spectral efficiency, filter
Shaat Musbah, Bader Faouzi
doaj +2 more sources
Greedy power allocation for multicarrier systems with reduced complexity [PDF]
, 2010 In this paper we consider a reduced complexity discrete bit loading for Multicarrier systems based on the greedy power allocation (GPA) under the constraints of transmit power budget, target BER, and maximum permissible QAM modulation order.
Al-Hanafy, Waleed, Weiss, S.
core +8 more sources