34 Hits in 8.4 sec

performance analysis of fading channels

2017 International Journal of Recent Trends in Engineering and Research  
Several statistical models are available for describing the fading envelope of the received signal in which Rayleigh,Rician and Nakagami are the most frequently applied models.  ...  channel data because it has lowest level crossing rate and highest average fade duration corresponding to threshold value.  ...  in 2002 that the level crossing rates (LCRs) and average fade durations (AFDs) of a fading channel find diverse applications in the evaluation and design of wireless communication systems.  ... 
doi:10.23883/ijrter.2017.3439.6innk fatcat:7rvg7cj7gvg3tfqzzxt2a5h25y

Level Crossing Rate and Average Fade Duration of Dual Selection Combining With Cochannel Interference and Nakagami Fading

Zoran Hadzi-Velkov
2007 IEEE Transactions on Wireless Communications  
This letter provides closed-form expressions for the outage probability, the average level crossing rate (LCR) and the average fade duration (AFD) of a dual diversity selection combining (SC) system exposed  ...  to the combined influence of the cochannel interference (CCI) and the thermal noise (AWGN) in Nakagami fading channel.  ...  The cochannel interference consists of n Nakagami-faded IID transmissions (each received over the two diversity branches).  ... 
doi:10.1109/twc.2007.060206 fatcat:l7n5mil7p5gmbhlhlqeiebp4l4

Model-Driven Approach to Fading-Aware Wireless Network Planning Leveraging Multiobjective Optimization and Deep Learning

Dragana Krstić, Nenad Petrović, Issam Al-Azzoni, Ali Ahmadian
2022 Mathematical Problems in Engineering  
The predictions about service demand and energy consumption are taken into account. Also, the impact of degradations resulting from fading and cochannel interference (CCI) effects is also considered.  ...  Further, we adopt model-based representation of handover strategies within the planning tool, enabling examination of the dynamic behavior of user-created plan, which is not exploited in other similar  ...  Analysis and derivation of several performances of mobile radio systems working over composite fading/ shadowing channels in the presence of colocated interference were given in [54] .  ... 
doi:10.1155/2022/4140522 fatcat:izi3xaojr5eupfbhizlxrahube

Link Adaptation of Precoded MIMO-OFDMA System With I/Q Interference

Udesh Oruthota, Olav Tirkkonen
2015 IEEE Transactions on Communications  
We consider link adaptation strategies with infinite rate granularity for block and ergodic fading models where the transmitter knows the statistics of the induced interference, and has perfect channel  ...  Precoder selection on the mirror subcarrier induces variations of the signal quality on the subcarrier of interest, and causes outage.  ...  ACKNOWLEDGMENT This work has been supported by the Academy of Finland (grant 254299). We thank the anonymous reviewers for their insightful and constructive comments.  ... 
doi:10.1109/tcomm.2015.2391180 fatcat:eczmrddmrveanjfjsyqagropbe

Effect of Slow Power Control Error on the Reverse Link of OSTBC DS-CDMA in a Cellular System With Nakagami Frequency-Selective MIMO Fading

Guillem Femenias, Loren Carrasco
2006 IEEE Transactions on Vehicular Technology  
of bit error rate, taking into account the effects of frequency-selective Nakagami-m fading with arbitrary parameters, correlated lognormal shadowing, power control imperfections, selection-based macroscopic  ...  In this paper, the performance of a multicell orthogonal space-time block-coding direct-sequence code-division-multiple-access system with base station diversity is studied for the reverse link in terms  ...  , and BS macrodiversity in the cell-selection process; transmitting over a frequency-selective Nakagami-m fading with arbitrary parameters; having a correlated lognormal shadowing among the BSs; and suffering  ... 
doi:10.1109/tvt.2006.878569 fatcat:hjhj4fuunzacfpfgx5ds7wi5f4

Level Crossing Rate and Average Outage Duration of Free Space Optical Links

Chaouki Ben Issaid, Mohamed-Slim Alouini
2019 IEEE Transactions on Communications  
The level crossing rate (LCR) and the average outage duration (AOD) are two important second order statistics that allow a deeper understanding of the behavior of the channel.  ...  In this paper, we study these metrics in order to assess the performance of free space optical (FSO) communication links in the presence of weak atmospheric turbulence and Rice-induced pointing errors.  ...  They also investigated the effect of the fading parameters on the LCR of a wireless relay communication system with two sections operating over κ − µ multipath fading environment in the presence of cochannel  ... 
doi:10.1109/tcomm.2019.2918324 fatcat:th2u6mgssrhqdou2ym3sa2z6ku

Satellite UMTS/IMT2000 W-CDMA air interfaces

P. Taaghol, B.G. Evans, E. Buracchini, G. De Gaudinaro, Joon Ho Lee, Chung Gu Kang
1999 IEEE Communications Magazine  
In such scenarios, the definition of service types is carried out in a new, more open way than in second-generation  ...  In the following numerical results, the worst case of pedestrian handheld users using pilot symbols in the traffic channels 3 experiencing slow Rician fading with no interference mitigating detectors has  ...  Another important advantage also related to path diversity consists of the E b /N 0 reduction achieved by spatial diversity signal combining in the presence of slow fading.  ... 
doi:10.1109/35.790970 fatcat:3jnkdxvhx5htdn3rxopiid4wki

2013 Index

2014 IEEE Transactions on Wireless Communications  
Note that the item title is found only under the primary entry in the Author Index.  ...  The primary entry includes the coauthors' names, the title of the paper or other item, and its location, specified by the publication abbreviation, year, month, and inclusive pagination.  ...  Achievable Rates over Doubly Selective Rician-Fading Channels under Peak-Power Constraint.  ... 
doi:10.1109/twc.2011.09.499-tw1401-index fatcat:w5ya5mg3sbcodb2crtuaoyk3su

Towards 1 Gbps/UE in Cellular Systems: Understanding Ultra-Dense Small Cell Deployments

David Lopez-Perez, Ming Ding, Holger Claussen, Amir H. Jafari
2015 IEEE Communications Surveys and Tutorials  
Simulation results show that network densification with an average inter site distance of 35 m can increase the cell- edge UE throughput by up to 48x, while the use of the 10GHz band with a 500MHz bandwidth  ...  In this epic campaign, three paradigms are noteworthy, i.e., network densification, the use of higher frequency bands and spectral efficiency enhancement techniques.  ...  This value is selected since it results in a standard deviation of the Rician fading smaller than 0.5 dB, flat fading.  ... 
doi:10.1109/comst.2015.2439636 fatcat:rjgl7ozogzgufmqxeuwwpfrkxu

Spatial Modulation for Generalized MIMO: Challenges, Opportunities, and Implementation

Marco Di Renzo, Harald Haas, Ali Ghrayeb, Shinya Sugiura, Lajos Hanzo
2014 Proceedings of the IEEE  
research in the years to come.  ...  The paper is concluded with the description of the world's first experimental activities in this vibrant research field.  ...  fading channels subject to power-imbalance, the error probability may improve in the presence of channel correlation.  ... 
doi:10.1109/jproc.2013.2287851 fatcat:53ei46mwlvdadiugdycgfb7eby

Adaptive MIMO-OFDM Based on Partial Channel State Information

P. Xia, S. Zhou, G.B. Giannakis
2004 IEEE Transactions on Signal Processing  
In this paper, we first provide a partial CSI model for orthogonal frequency division multiplexed (OFDM) transmissions over multi-input multioutput (MIMO) frequency selective fading channels.  ...  Numerical results confirm that the adaptive two-dimensional space-time coder-beamformer (with two basis beams as the two "strongest" eigenvectors of the channel's correlation matrix perceived at the transmitter  ...  Notice that eq. ( 19 ) is nothing but the average BER of an 2N r -branch diversity combining system, with N r branches undergoing Rician fading with Rician factor K 1 [k] = λ 1 [k]/(N r σ 2 [k]) ; while  ... 
doi:10.1109/tsp.2003.819986 fatcat:ki6em6j2h5hpheq3h3zjsvwhwe

A comparative study of narrowband microcellular speech transmission schemes

J.E.B. Williams, L. Hanzo, R. Steele, J.C.S. Cheung
1994 IEEE Transactions on Vehicular Technology  
It becomes apparent that the selection of the type of modem and the number of its levels, the choice of speech codec to be used, and whether to deploy a channel codec, depends on the channel signal-to-noise  ...  Following the implications of our limited number of experiments, we generalize our findings to some of the requirements of an adaptive transceiver that might be deployed in the next generation of mobile  ...  We mention that in the presence of frequency dispersion in wide-band channels and provided the channel estimates are accurate, then the Viterbi detector performance will actually improve because path diversity  ... 
doi:10.1109/25.330154 fatcat:e2l4t65sgrbb5cnodzffecrgwi

Hybrid Automatic-Repeat-reQuest Systems for Cooperative Wireless Communications

Hoang Anh Ngo, Lajos Hanzo
2014 IEEE Communications Surveys and Tutorials  
of Fig. 3.1 for transmission over correlated fading channels.  ...  CDMA, including imperfect CE, while considering the effects of pathloss as well as Rician fading and co-channel interference.  ... 
doi:10.1109/surv.2013.071913.00073 fatcat:ct2gqy36i5fuzbnnarvk3j6jiq

A Systematic Review on NOMA Variants for 5G and Beyond

Ishan Budhiraja, Neeraj Kumar, Sudhanshu Tyagi, Sudeep Tanwar, Zhu Han, Doug Young Suh, MD. Jalil Piran
2021 IEEE Access  
Over the last few years, interference has been a major hurdle for successfully implementing various end-user applications in the fifth-generation (5G) of wireless networks.  ...  interference mitigation, resource allocations, and QoS management in the 5G environment.  ...  Its performance was found good in terms of an instantaneous and average pairwise error probability (PEP) over the Rayleigh fading channel.  ... 
doi:10.1109/access.2021.3081601 fatcat:mzmmr3km5zehhh3fnupyelfo3e


Aleksandra Panajotović
2015 Automatic Control and Robotics   unpublished
In this paper, second order statistics of dual selection combining (SC) system applying desired signal decision algorithm are obtained for the case when that diversity system operates in Weibull interference-limited  ...  Namely, a novel closed-form expression for outage probability (OP), necessary for an analysis of average fade duration (AFD), in the term of Meijer's G-function is derived for general case in which desired  ...  Acknowledgement: This work has been founded by Serbian Ministry of Education and Science under project TR-32052, TR-33035 and III-44006.  ... 
« Previous Showing results 1 — 15 out of 34 results