333 Hits in 9.7 sec

Performance evaluation of adaptive beamforming in 5G-V2X networks

Ilmari Maskulainen, Petri Luoto, Pekka Pirinen, Mehdi Bennis, Kari Horneman, Matti Latva-aho
2017 2017 European Conference on Networks and Communications (EuCNC)  
In this work, the possibility of exploiting beamforming in LTE-V2X is considered.  ...  The performance is compared to the conventional maximumratio combining (MRC) and LTE codebook precoded minimum mean square error (MMSE) receivers.  ...  Performance Analysis of LTE codebook and SVD precoding In the first scenario Rayleigh channel model is used to analyze the performance in ideal case.  ... 
doi:10.1109/eucnc.2017.7980728 dblp:conf/eucnc/MaskulainenLPBH17 fatcat:rwfanujwmzhmjh6h2arms4mqru

Precoding Performance with Codebook Feedback in a MIMO-OFDM System

Min Zhang, Mansoor Shafi, Peter J. Smith, Pawel A. Dmochowski
2011 2011 IEEE International Conference on Communications (ICC)  
In the case of SVD receivers, this interference results in a capacity floor.  ...  Limited feedback precoding is part of the LTE standard.  ...  Capacity Loss In Fig. 4 , we wish to determine the impact of size of codebook and also codebook design on the EC. LTE codebook is only defined with 16 PMs for 4 antennas [3] .  ... 
doi:10.1109/icc.2011.5963485 dblp:conf/icc/ZhangSSD11 fatcat:cbmg2e5xx5cwnmphraiol4muui

Performance upper bounds for coordinated beam selection in LTE-Advanced

Jochen Giese, M. Awais Amin
2010 2010 International ITG Workshop on Smart Antennas (WSA)  
The impacts of a heterogeneous layout on the interference characteristics in the downlink are evaluated by simulation and an assessment of gains achieved through coordination is provided.  ...  Coordinated Multipoint (CoMP) transmission techniques have been considered as tools to improve cell-edge and average data throughput for LTE-Advanced.  ...  Without any kind of inter-cell coordination, the scheduler at each eNB will select a specific precoding matric for each user based on the precoding matrix index (PMI) obtained from this user.  ... 
doi:10.1109/wsa.2010.5456437 dblp:conf/wsa/GieseA10 fatcat:44eork74afaitl2wp5l55cbm7a

Intercell Interference Coordination through Limited Feedback

Lingjia Liu, Jianzhong (Charlie) Zhang, Jae-Chon Yu, Juho Lee
2010 International Journal of Digital Multimedia Broadcasting  
of the degreesoffreedom in the spatial domain.  ...  cell throughput of the future wireless communication networks.  ...  Acknowledgment The authors would like to thank Dr. Farooq Khan, Mr. Zhouyue (Jerry) Pi, and Dr. Donghee Kim for useful discussions.  ... 
doi:10.1155/2010/134919 fatcat:uqhmimyxarcllgfdhywwgtddya

Radio resource management in heterogeneous deployments: A system level perspective

Thomas Wirth, Johannes Dommel, Kai Borner, Lars Thiele, Thomas Haustein
2011 2011 Conference Record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers (ASILOMAR)  
+zm (1) The desired data stream xi,m transmitted to the m th user from the i th cell is distorted by the intra-and inter-cell interference plus noise aggregated in ζm and zm, respectively.  ...  Aim of this paper is to evaluate RRM techniques which focus on a distributed precoding concept on system-level taking into account realistic antenna models optained by 3D antenna measurements.  ...  In the case precoding vector d) is used, data is transmitted by the Macro sector as well as both Pico cells.  ... 
doi:10.1109/acssc.2011.6190097 dblp:conf/acssc/WirthDBTH11 fatcat:mtwipbpnnfdwrkkzufuxhc6zfm

Interference Aware Inter-Cell Rank Coordination for 5G Systems

Nurul Huda Mahmood, Klaus Ingemann Pedersen, Preben Mogensen
2017 IEEE Access  
An interference aware inter-cell rank coordination framework for the future fifth generation wireless system is proposed in this article.  ...  In addition, a game-theoretic interference pricing measure is introduced as an inter-cell interference management mechanism to balance the spatial multiplexing vs. interference resilience trade-off.  ...  Codebook Based Precoding The selection of the precoding matrix W can either be codebook based where the precoder is chosen from a predefined finite codebook W, or non-codebook based where it is calculated  ... 
doi:10.1109/access.2017.2672799 fatcat:wkho4mjodjcmhn24ckgpn4yrgy

MIMO technologies for the wireless future

G. Bauch, A. Alexiou
2008 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications  
Network coordination (multisite MIMO) can be applied in this case, which can achieve significant improvements for the users including those at the cell edge, based on coordinated transmission and reception  ...  Here, the precoder is determined by  ...  In this case the resulting performance is equivalent to that of a MU-MIMO (multi-point to multi-point) system with a distributed antenna array consisting of all the antenna arrays on all base stations.  ... 
doi:10.1109/pimrc.2008.4699969 dblp:conf/pimrc/BauchA08 fatcat:24gb5o2ubbdblowfl7gqpbh2wa

Comp-Jt With Dynamic Cell Selection, Global Precoding Matrix And Irc Receiver For Lte-A

Heba Raafat Ahmed, Essam Sourour, Hassan M.Elkamchouchi
2015 International Journal of Wireless & Mobile Networks  
A cell-edge user selects the base stations that jointly transmit the desired signal from the available ones (we assumed 3).  ...  Also we compare the BER performance for 3 and 4 layers in case of different values of the desired to interference eNB power ratio.  ...  To further combat inter-cell interference the UE employs Interference Rejection Combining (IRC) based on the Minimum Mean Square Error (MMSE) criteria.  ... 
doi:10.5121/ijwmn.2015.7303 fatcat:pnde4vgjxnhife6i2pt7vrcxb4

Interference Management for Future Cellular OFDMA Systems Using Coordinated Multi-Point Transmission

2010 IEICE transactions on communications  
transmit beamforming using multiple base stations grouped into a wireless distributed network (WDN), which is denoted as coordinated multi-point joint transmission in the 3GPP LTE-Advanced standardization  ...  In addition, feasibility of coordinated multi-point joint transmission is demonstrated in a real-time prototype setup, i.e. in the Berlin LTE-Advance Testbed.  ...  Acknowledgements The authors wish to thank F. Bauermeister, K.  ... 
doi:10.1587/transcom.e93.b.3228 fatcat:t7jmmpqqxzcrfp56hhdfcn5oxi

On the Impact of Precoding Errors on Ultra-Reliable Communications [chapter]

Guillermo Pocovi, Klaus I. Pedersen, Beatriz Soret
2016 Lecture Notes in Computer Science  
Motivated by the stringent reliability required by some of the future cellular use cases, we study the impact of precoding errors on the SINR outage performance for various spatial diversity techniques  ...  Based on the obtained results, it is discussed what transmission modes are more relevant depending on the feedback error constraint.  ...  Within each cell, the UEs are served on orthogonal resources, i.e. there is no intra-cell interference as it is also the case for LTE assuming single-stream and single-user MIMO transmission modes [4]  ... 
doi:10.1007/978-3-319-51376-8_4 fatcat:dswayrtba5dj3btgdvr5kksblm

Scheduling Algorithm for Coordinated Beamforming in Heterogeneous Macro / Pico LTE-Advanced Networks

Jakob Belschner, Daniel de Abreu, Joachim Habermann, Veselin Rakocevic
2013 2013 IEEE 77th Vehicular Technology Conference (VTC Spring)  
In this case the transmit power imbalance between different base station types creates new interference situations.  ...  Coordinated beamforming is one method of base station cooperation that can be applied to mitigate interference in this scenario.  ...  There is currently no option for precoding based on ideal channel knowledge in the SLS. The calculation of precoders is therefore always based on feedback from the MSs.  ... 
doi:10.1109/vtcspring.2013.6692741 dblp:conf/vtc/BelschnerAHR13 fatcat:uez2jgxlujejdd2n6ajtgkjj54

Impact of LTE precoding for fixed and adaptive rank transmission in moving relay node system

Ayotunde O. Laiyemo, Pekka Pirinen, Matti Latva-aho, Jaakko Vihriala, Vinh Van Phan
2013 2013 13th International Conference on ITS Telecommunications (ITST)  
Further improvement in performance is achieved with codebook based precoders adopted by third generation partnership project (3GPP) for spatial multiplexed transmission mode.  ...  Open loop and closed loop precoded spatial multiplexing for fixed and adaptive rank transmissions were simulated and analyzed on the backhaul link of a cooperative MRN system in a high speed train.  ...  The LTE/LTE-A standard has adopted the use of codebook based precoding in its spatial multiplexing transmission modes in order to improve the SINR and at the same time limit the signaling overhead [6]  ... 
doi:10.1109/itst.2013.6685554 dblp:conf/itst/LaiyemoPLVP13 fatcat:guvghviovvg4fbvwqgomuxmpze

An algorithm for distributed cooperative precoder selection in a cellular network

J Vinosh Babu James, Bhaskar Ramamurthi, V Ganesh
2010 2010 National Conference On Communications (NCC)  
We propose a distributed algorithm that independently determines the precoder which mitigates the interference to the neighboring cell edge users without compromising on the in-cell performance.  ...  In this paper, we study cooperation in the downlink of an interference channel.  ...  The high spectral efficiency gains possible by employing MIMO vanish in the presence of inter-cell interference.  ... 
doi:10.1109/ncc.2010.5430220 fatcat:j5d75ibha5h6fniet36vee3h4u

Impact on Inter-Cell Interference of Reference Signal for Interference Rejection Combining Receiver in LTE-Advanced Downlink

Yousuke SANO, Yusuke OHWATARI, Nobuhiko MIKI, Yuta SAGAE, Yukihiko OKUMURA, Yasutaka OGAWA, Takeo OHGANE, Toshihiko NISHIMURA
2012 IEICE transactions on communications  
When the transmission modes using the cell-specific RS (CRS) in LTE/LTE-Advanced are assumed, the property of the non-precoded CRS is different from that of the data signals.  ...  Furthermore, the results verify the observations made in regard to the impact of inter-cell interference of the CRS for various average received signal-to-noise power ratio (SNR) and signal-to-interference  ...  However, based on the previous CDF results of the output SINR in Fig. 3(b) , we can say that this impact on the IRC receiver due to the inter-cell interference of the CRS is small compared to that due  ... 
doi:10.1587/transcom.e95.b.3728 fatcat:mmlyxz7spfctfmiw5wfv6pcrzi

System-level performance of LTE-Advanced with joint transmission and dynamic point selection schemes

Helka-Liina Määttänen, Kari Hämäläinen, Juha Venäläinen, Karol Schober, Mihai Enescu, Mikko Valkama
2012 EURASIP Journal on Advances in Signal Processing  
The results show that there are substantial performance gains in cell-edge throughputs for both JT and DPS CoMP over the baseline Release 10 LTE-Advanced with practical feedback options.  ...  In this CoMP system, cooperation is enabled for cell-edge users via dynamic switching between the normal single-cell operation and CoMP.  ...  In this case, one data stream is transmitted on several layers. In LTE, the maximum number of independently modulated and coded data streams N s is two.  ... 
doi:10.1186/1687-6180-2012-247 fatcat:b2kln4yt3fcmtpxf6zeovnvhfi
« Previous Showing results 1 — 15 out of 333 results