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BER Performance of OFDM-BPSK Over Nakagami Fading Channels
2011
International Journal of Computer Applications
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In this paper, the Bit Error Rate (BER) performance of OFDM -BPSK system over flat Nakagami fading channels is analyzed. This model is versatile enough to represent fading. ...
Finally simulations of OFDM signals are carried with Nakagami faded signal to understand the effect of channel fading and to obtain optimum value of m, n and q based on BER and SNR. ...
OFDM systems have gained an equivalent attention with flat fading environment In [8] , present the method of channel estimation and Carrier frequency offset to design a channel is already presented in ...
doi:10.5120/2252-2436
fatcat:sctfvaqdhvbpdjuujfxb5j4bn4
BER Performance of OFDM-BPSK and -QPSK Over Generalized Gamma Fading Channel
2010
International Journal of Computer Applications
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In this paper, the BER performance of OFDM-BPSK and -QPSK system over generalized gamma fading channel has been reported. ...
Here, simulations of OFDM signals are carried with generalized gamma faded signal to understand the effect of channel fading. ...
In [10] , present the method of channel estimation and carrier frequency offset to design an OFDM receiver in flat fading environment. ...
doi:10.5120/736-1035
fatcat:xnwntdsrj5fjlbbs2dwqhblc5q
On Channel Estimation of OFDM-BPSK and -QPSK over Generalized Alpha-Mu Fading Distribution
2010
International Journal of Communications, Network and System Sciences
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In flat fading environment, channel estimation is done using phase estimation of the transmitted signal with the help of trained symbols. Final results show the improvement in BER. ...
Investigations of channel estimation schemes gave an idea of further reducing the BER as to improve the performance of OFDM based systems. ...
A novel channel estimation scheme for OF-DMA uplink packet transmissions over doubly selective channels was suggested in [9] . ...
doi:10.4236/ijcns.2010.34048
fatcat:os7sxst465csfi3f3noapbtxby
A Robust Channel Estimation for SCFDMA System
English
2014
International Journal of Research and Applications
English
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In this paper, a robust technique is proposed for a single carrier frequency division multiple access system channel estimation in flat-fading non-Gaussian channels. ...
Simulation results are also provided to demonstrate the efficacy of the proposed detector over the least squares, Huber and Hampel based detectors in flat-fading non-Gaussian channels. ...
SC-FDMA ensures high data rate transmission, utilizing single carrier m frequency domain equalization. ...
doi:10.17812/ijra.1.3(17)2014
fatcat:rrr4cdssdndrji3gp4o56lgpry
Kalman Predictor Design for Frequency-Adaptive Scheduling of FDD OFDMA Uplinks
2007
2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications
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Due to channel time-variability and delays of the transmission control loop, this will in general require channel prediction. ...
Frequency-adaptive multiuser scheduling in OFDM utilizes the frequency-selective small-scale fading to allocate subcarriers with advantageous signal-to-noise ratio to each user. ...
Channel model The results in this section are evaluated on two channel models: A flat (frequency non-selective) channel, and a frequency selective non-line-of sight channel for urban environments (WIN-NER ...
doi:10.1109/pimrc.2007.4394065
dblp:conf/pimrc/AronssonS07
fatcat:76dwxtdrwrd5lgkenrnlr65xzi
OFDM Systems for Wireless Communications
2010
Synthesis Lectures on Algorithms and Software in Engineering
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Being a frequency-domain approach to communications, OFDM has important advantages in dealing with the frequency-selective nature of high data rate wireless communication channels. ...
Orthogonal Frequency Division Multiplexing (OFDM) systems are widely used in the standards for digital audio/video broadcasting, WiFi and WiMax. ...
As will be shown in subsequent channels, OFDM converts one frequency selective channel into several frequency-flat fading channels, motivating the need for understanding the nature of frequency-flat fading ...
doi:10.2200/s00255ed1v01y201002ase005
fatcat:j6c625qh5ncqnishbfh3jipcim
Simulation of a Multi-Carrier System in a Non-Linear Flat Fading Channel
2009
The Journal of Engineering Research
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Also, the simulation over flat fading channel depicted that QAM signaling in MC scheme based on DCT performed better than that in FFT-based scheme, although it depends strongly on the channel parameters ...
It was found that a reduction up to 5dB in peak power can be gained over the conventional system. ...
versus SNR over flat fading channel Pe in DCT-based MC scheme versus SNR with 16-QAM (discrete line) and 64-QAM (solid line) modulated sub-carriers over three different flat fading channel characters ...
doi:10.24200/tjer.vol6iss2pp47-51
fatcat:o2c3uh4l4fcznivlhbyt6b54w4
A reduced complexity frequency offset estimation technique for flat fading MIMO channels
2004
Proceedings of the IEEE 6th Circuits and Systems Symposium on Emerging Technologies: Frontiers of Mobile and Wireless Communication (IEEE Cat. No.04EX710)
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In this contribution we consider the carrier frequency offset estimation in the case of linear digital modulation, transmitted over a flat-fading Multiple-Input Multiple-Output (MIMO) Channel. ...
For this problem, Maximum-Likelihood (ML) estimation gives rise to a carrier frequency offset algorithm that involves the maximization of the magnitude of a Fourier transform. ...
The first author also acknowledges the support from the Institute for the Promotion of Innovation through Science and Technology in Flanders (IWT-Vlaanderen). ...
doi:10.1109/casset.2004.1321985
fatcat:w3xdmx36dzbbxprwsaiqp7oiom
Bandwidth efficient multi-station wireless streaming based on complete complementary sequences
2009
IEEE Transactions on Wireless Communications
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However the resulting transmission in parallel over wireless channels poses serious challenges, especially multiple access interference, multipath fading, noise effects and synchronization. ...
Results obtained show 1.75 Mchip/sec (or 25%) reduction in transmission rate, with only up to 6 dB loss in frequency-selective channel compared to a straightforward solution based solely on complete complementary ...
In this example, we assume flat fading for simplicity, and perfect channel knowledge at the client. ...
doi:10.1109/twc.2009.070958
fatcat:by7i7weecnhk7okryrnpel4ovi
Reliability of Trigonometric Transform-based Multi-Carrier Scheme
2018
ARO. The Scientific Journal of Koya University
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The behaviour of the transceiver is studied in the context of practical impairments like fading channel, carrier frequency offset and narrow band interference. ...
This work is looking for a new physical layer of a multi-carrier wireless communication system to be implemented in low complexity way, resorting to suitable fast transform. ...
Flat fading channel The coherence bandwidth measures the separation in frequency after which two signals will experience uncorrelated fading. ...
doi:10.14500/aro.10312
fatcat:ljplsxd6erf4vgblj5uyy45lyi
Downlink Transmission of Broadband OFCDM Systems—Part I: Hybrid Detection
2005
IEEE Transactions on Communications
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On the other hand, in a slow fading channel, a large value of the channel estimation window size , where is an odd integer, is expected. ...
The effects of channel estimation errors and sub-carrier correlation are also studied. ...
each sub-carrier experiences a flat fading channel. ...
doi:10.1109/tcomm.2005.844962
fatcat:6rz7htpxzzhcdlsehaimq3kxsm
A physical layer simulator for WiMAX in Rayleigh fading channel
2011
2011 6th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI)
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The main blocks are implemented with the aid of the Matlab programming language and the bit error rate (BER) curves are presented in Rayleigh fading channel. ...
WiMAX is a wireless technology which offers high data rate transmission in broadband. In this paper, the architecture of the WiMAX physical layer simulator is presented. ...
ACKNOWLEDGMENT The research reported in this paper was developed in the framework of a grant funded by the Romanian Research Council (CNCSIS) with the title "Using wavelets theory for decision making" ...
doi:10.1109/saci.2011.5873014
dblp:conf/saci/MountassirBOKI11
fatcat:4wmcl57pjjdmbfftzanh26tmvi
Synchronization in OFDM Based on Piloting Technique
2017
International Journal of Science and Research (IJSR)
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This technical paper plays a prominent role in the selection of good quality channel with minimum loss of information with high transmission rate for synchronization of transmitter with receiver. ...
An analytical OFDM system using pilot directed synchronization of OFDM with dispersive channel, fading channel and their combination with AWGN channel simulink model used to study Delays between transmitted ...
QAM is further divided in 16, 32 and 64 QAM techniques. In a classical parallel data system, the total signal frequency band is divided into N no overlapping frequency sub channels. ...
doi:10.21275/art20174831
fatcat:n5amj7ljxzetre5mpyejzeo4mm
Adaptive radio for multimedia wireless links
1999
IEEE Journal on Selected Areas in Communications
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The quality of wireless links suffers from timevarying channel degradations such as interference, flat-fading, and frequency-selective fading. ...
Experimental measurements and simulation results are presented in this paper to illustrate the adaptive radio's energy savings. ...
Schurgers for their technical contributions to this work. G. Wen's assistance with the channel modeling is acknowledged. ...
doi:10.1109/49.768196
fatcat:w22wnaunifh2rabvwgcqhkqe2y
Multi-user detection for asynchronous space-frequency block coded schemes in frequency selective environments
2012
2012 IEEE Global Communications Conference (GLOBECOM)
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While multi-user detection in synchronous systems or in flat fading environments has been successfully addressed, it is still an open and challenging problem in the practical case of asynchronous MIMO ...
systems employing space-frequency (time) block coding and operating in frequency selective environments. ...
In the current work, we further extend the results to frequency selective channels. ...
doi:10.1109/glocom.2012.6503795
dblp:conf/globecom/NikitopoulosBJY12
fatcat:6aa22vu4bfg5jbpp52zaozdkva
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