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Cooperative Communications over Flat Fading Channels with Carrier Offsets: A Double-Differential Modulation Approach
2008
EURASIP Journal on Advances in Signal Processing
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We propose double-differential (DD) modulation for the amplify-and-forward protocol over Nakagami-m fading channels with carrier offsets. ...
The proposed double-differential system is immune to random carrier offsets, whereas the conventional single-differential modulation-based cooperative system breaks down. ...
flat-fading Nakagami-m channels with random carrier offsets ...
doi:10.1155/2008/531786
fatcat:ywrr7dqnrrfvjdzvhgshyd6ovu
Cooperative Transmission in Mobile Wireless Sensor Networks with Multiple Carrier Frequency Offsets: A Double-Differential Approach
2014
Mathematical Problems in Engineering
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To enhance the performance of such MWSNs, we propose a relay selection (RS) based double-differential (DD) cooperative transmission scheme, termed RSDDCT, in which the best relay sensor node is selected ...
As a result of the rapidly increasing mobility of sensor nodes, mobile wireless sensor networks (MWSNs) would be subject to multiple carrier frequency offsets (MCFOs), which result in time-varying channels ...
Conclusion In this paper, we have proposed and analyzed a robust relay selection based double-differential cooperative transmission (RSDDCT) scheme for MWSNs over Rayleigh fading channels, where all the ...
doi:10.1155/2014/853821
fatcat:y2tpnjmhk5cxff5tpqapdvcv4a
Wireless Cooperative Networks
2008
EURASIP Journal on Advances in Signal Processing
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The problem of choosing the best relay node in relaying networks is addressed in "Performance of multiple-relay cooperative diversity systems with best-relay selection over rayleigh fading channels" by ...
They consider an amplify-and-forward (AF) cooperative diversity system where a source node communicates with a ...
Bhatnagar et al. in "Cooperative communications over flat fading channels with carrier offsets: a double-differential modulation approach." ...
doi:10.1155/2008/810149
fatcat:c6vwhztbpjaglnjnz2fsdpgvam
Precoded Differential Orthogonal Space-Time Modulation Over Correlated Ricean MIMO Channels
2008
IEEE Journal on Selected Topics in Signal Processing
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Song, "Cooperative Communications over Flat Fading Channels with Carrier Offsets: A Double-Differential Modulation Approach", EURASIP Journal on Advances in Signal Processing, in special issue on "Wireless ...
Communications over Flat Fading Channels with Carrier Offsets: A Double-Differential Modulation Approach 155 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159 2 System Model ...
doi:10.1109/jstsp.2008.920669
fatcat:fgflejg4fbcihfiembo5hmuhrm
Carrier Frequency Offset in VSF-OFCDM Systems with Subcarrier Grouping: Analysis, Estimation and Correction
2010
Wireless personal communications
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We investigate the effect of carrier frequency offset (CFO) on the performance of downlink variable spreading factor (VSF) orthogonal frequency and code division multiple access (OFCDM) systems when subcarrier ...
Numerical results show that, when the total spreading factor is fixed, a system with higher frequency domain spreading factor is more sensitive to CFO than that with lower frequency domain spreading factor ...
Furthermore, the channel fading and phase shift variables are considered to be constant over a chip duration T c . ...
doi:10.1007/s11277-010-9930-x
fatcat:murdgwuvmbeqlhg3cyc7blcxmy
MIMO Signal Processing in Offset-QAM Based Filter Bank Multicarrier Systems
2016
IEEE Transactions on Signal Processing
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This paper focuses on the offset quadrature amplitude modulation (OQAM)based FBMC variant, known as FBMC/OQAM, which presents outstanding spectral efficiency and confinement in a number of channels and ...
Next generation communication systems have to comply with very strict requirements for increased flexibility in heterogeneous environments, high spectral efficiency and agility of carrier aggregation. ...
Again, model 2) with the channel frequency response being invariant over a FT neighborhood is assumed. ...
doi:10.1109/tsp.2016.2580535
fatcat:hydsjefrkbesrokmyup36ksqfa
A Review on Cooperative Diversity Techniques Bypassing Channel Estimation
[article]
2017
arXiv
pre-print
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This article presents a review of the differential transmission techniques for cooperative diversity networks. ...
frequency band over a variety of signal paths. ...
Considering a point-to-point transmission with carrier offset, the received signal is described by [ ] = ℎ [ ] + [ ], where, ℎ is the channel gain and is the unknown carrier offset with [ ] as the AWGN ...
arXiv:1711.10643v1
fatcat:3mvfsakmv5a45mb6lpwzh7zu54
Distributed Double-Differential Modulation for Cooperative Communications Under CFO
2007
IEEE GLOBECOM 2007-2007 IEEE Global Telecommunications Conference
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When a terminal is recruited to cooperate with other neighboring terminals, its channel state and carrier frequency offset (CFO) may be unknown to the destination. ...
Under these circumstances, this paper considers the use of distributed double-differential (DD) modulation, which simplifies receiver implementation because it by-passes channel and CFO estimation. ...
The fading channel h r between T r and D is quasistatic, flat over N symbols and can be modelled as a complex zero-mean Gaussian random variable; i.e., h r ∼ CN (0, σ 2 hrγ ) A2. ...
doi:10.1109/glocom.2007.652
dblp:conf/globecom/CanoMCR07
fatcat:774uxsvvvzdfhphd75b6lb5wki
RF Impairments in Wireless Transceivers: Phase Noise, CFO, and IQ Imbalance – A Survey
2021
IEEE Access
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However, their imperfections may result in RF impairments, including phase noise (PN), carrier frequency offset (CFO), and in-phase (I) and quadrature-phase (Q) imbalance. ...
Furthermore, we discuss artificial intelligence (AI) approaches for developing estimation and compensation algorithms for RF impairments. ...
Additionally, [207] studies CFO estimation in mobile digital communications with pilot symbol-assisted modulation over flat-fading channels. ...
doi:10.1109/access.2021.3101845
fatcat:ete2cakeerdjrahum3gcuuexwe
2019 Index IEEE Wireless Communications Letters Vol. 8
2019
IEEE Wireless Communications Letters
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., +, LWC June 2019 929-932
Cooperative communication
A Double Threshold-Based Cooperative Spectrum Sensing With Novel
Hard-Soft Combining Over Fading Channels. ...
., +, LWC Feb. 2019 193-196
Channel estimation
A Double Threshold-Based Cooperative Spectrum Sensing With Novel
Hard-Soft Combining Over Fading Channels. ...
doi:10.1109/lwc.2019.2961756
fatcat:bwxehcl4ejew7a6m66prb6s4z4
A Survey on Higher-Order QAM Constellations: Technical Challenges, Recent Advances, and Future Trends
2021
IEEE Open Journal of the Communications Society
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Finally, a comparative study of various QAM constellations is presented which justifies the supremacy of HQAM over other QAM constellations for various wireless communication systems and a potential modulation ...
There have been various solutions to improve the performance, out of them, one of the fundamental solutions over the years is design of optimum modulation schemes. ...
modulations schemes encoded with gray mapping. In [195] , authors derived the generalized log likelihood ratio for soft decision channel decoding for QAM constellations. ...
doi:10.1109/ojcoms.2021.3067384
fatcat:xx3tpsasevbqjg3ej2vktivqdi
A Review on Minimization of BER and Power of Ad hoc Network
english
2015
International Journal of Innovative Research in Computer and Communication Engineering
english
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Over the last decade, a large number of pioneering works have provided foundations for both theory and applications of Wireless Ad hoc Networks (WLAN). ...
As ad hoc technology is becoming the demand of present and future trends that needs for a reliable communication link having minimum BER and power. ...
of different factors on BER when transmitted signal is modulated by BPSK/QPSK message bits from a flat Rayleigh fading channel with balance link condition. ...
doi:10.15680/ijircce.2015.0302037
fatcat:u5aeho2zcffh5kw6zea2iombse
Review Article: Multicarrier Communication for Underwater Acoustic Channel
2013
International Journal of Communications, Network and System Sciences
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In past decades, there has been a growing interest in the discussion and study of using underwater acoustic channel as the physical layer for communication systems, ranging from point-to-point communications ...
to underwater multicarrier modulation networks. ...
In fact, if the number of subcarriers is large enough, each subcarrier only deals with flat fading rather than with frequency selective fading as a wideband carrier does. ...
doi:10.4236/ijcns.2013.68039
fatcat:b5ma2ie64nc5jcxuu4e4dn24xu
Survey on Free Space Optical Communication: A Communication Theory Perspective
2014
IEEE Communications Surveys and Tutorials
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Specific topics include advances in modulation, channel coding, spatial/cooperative diversity techniques, adaptive transmission, and hybrid RF/FSO systems. ...
FSO systems are used for high rate communication between two fixed points over distances up to several kilometers. ...
Feedback
DOF
Degree-Of-Freedom
Double GG Double Generalized Gamma
DPIM
Digital Pulse Interval Modulation
DPIWM
Digital Pulse Interval and Width Modulation
DPolPSK
Differential Polarization-Phase-Shift ...
doi:10.1109/comst.2014.2329501
fatcat:exn6xduerrb37nr3t4x3vuj6cy
Unified MIMO-Multicarrier Designs: A Space–Time Shift Keying Approach
2015
IEEE Communications Surveys and Tutorials
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We commence with a brief review of the family of MIMO systems, which is followed by the design of STSK systems in the context of MC modulation-based transmissions over dispersive wireless channels. ...
We also provide a rudimentary introduction to MC differential STSK employing both conventional differential detection and multiple-symbol differential sphere decoding for the sake of dispensing with channel ...
Hence, the differential multi-carrier cooperative STSK system may be considered an attractive candidate for cooperative MIMO-aided multi-carrier communications. ...
doi:10.1109/comst.2014.2375321
fatcat:iuozclpzqrbbzhjr4uu2rcc52a
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