Filters








175 Hits in 9.4 sec

The Impact of Noise Correlation and Channel Phase Information on the Data-Rate of the Single-Symbol ML Decodable Distributed STBCs [article]

Zhihang Yi, Il-Min Kim
2007 arXiv   pre-print
Specifically, we propose the row-monomial DOSTBCs with channel phase information (DOSTBCs-CPI) and derive an upper bound of the data-rate of those codes.  ...  In this case, we derive an upper bound of the data-rate of the DOSTBC and it is larger than that of the row-monomial DOSTBCs in [1].  ...  The codes achieve the single-symbol ML decodability and the full diversity order [27] .  ... 
arXiv:0708.3387v1 fatcat:ux44q6cesrdt5pyvudt3ns6qn4

Precoded Differential Orthogonal Space-Time Modulation Over Correlated Ricean MIMO Channels

Manav R. Bhatnagar, Are Hjorungnes, Lingyang Song
2008 IEEE Journal on Selected Topics in Signal Processing  
It can be seen from (1.15) that the ML decoder does not need the information about the channel h for decoding of the transmitted data z[n] and the decision is based on two consecutively received data samples  ...  surrounding the transmitter and the receiver cause the correlation of the local antenna elements, while they have no impact on the correlation at the other end of the link.  ... 
doi:10.1109/jstsp.2008.920669 fatcat:fgflejg4fbcihfiembo5hmuhrm

Impact of Channel Estimation Errors on the Performance of DFE Equalizers with Space Time Block Codes in Wideband Fading Channels

Mohamed B. Noune, Andrew Nix
2007 2007 IEEE Wireless Communications and Networking Conference  
In this paper we address the mitigation of wideband channels effects on Alamouti STBC codes.  ...  As a result of delay spread and terminal mobility, the transmitted data stream can suffer from severe time varying Inter Symbol Interference (ISI) which requires a form of channel equalization.  ...  of data rate and Packet Error Rate (PER) [5] .  ... 
doi:10.1109/wcnc.2007.419 dblp:conf/wcnc/NouneN07 fatcat:qrdbkkegmffjzbgbjrflhvuh4m

A Survey on MIMO Transmission with Discrete Input Signals: Technical Challenges, Advances, and Future Trends [article]

Yongpeng Wu, Chengshan Xiao, Zhi Ding, Xiqi Gao, Shi Jin
2017 arXiv   pre-print
, and MIMO wiretap channel.  ...  However, most of the advances in the design of high speed wireless multiple-input multiple output (MIMO) systems are based on information-theoretic principles that demonstrate how to efficiently transmit  ...  The proposed STBC reduces the complexity of ML decoding to the order of the standard QSTBCs are combined to formulate a new 2 pcu symbol rate and half diversity STBC with simplified ML decoding complexity  ... 
arXiv:1704.07611v1 fatcat:4gep4gnbefdytjdggniocdora4

Performance of MIMO Systems Using Space Time Block Codes (STBC)

Christopher M. Lau
2021 Open Journal of Applied Sciences  
MIMO systems utilize Space Time Block Codes (STBC) as one of the leading ways to obtain higher data rates with limited bandwidth and power.  ...  All simulations are coded, generated and plotted using MATLAB resulting in graphical data representing the bit-error rate (BER) to signal-to-noise ratio (E b /N 0 ) or SNR.  ...  The code rate of a STBC, with the code word matrix X, is defined as R = k/T symbols per channel use where k is the number of independent information symbols embedded in X [7] .  ... 
doi:10.4236/ojapps.2021.113020 fatcat:keiaurrlpze2vltzrhy2pwfh6i

From theory to practice: an overview of MIMO space-time coded wireless systems

D. Gesbert, M. Shafi, Da-shan Shiu, P.J. Smith, A. Naguib
2003 IEEE Journal on Selected Areas in Communications  
We present the state of the art in channel modeling and measurements, leading to a better understanding of actual MIMO gains.  ...  After some background on the research leading to the discovery of the enormous potential of MIMO wireless links, we highlight the different classes of techniques and algorithms proposed which attempt to  ...  Kalbasi and Dr. D. Gore for reviewing the manuscript and for their constructive remarks.  ... 
doi:10.1109/jsac.2003.809458 fatcat:ispi263eu5g2xhwy3xpwhtyewi

Randomized space-time block coding for distributed amplify-and-forward cooperative relays

Francesco Verde, Anna Scaglione
2010 2010 IEEE International Conference on Acoustics, Speech and Signal Processing  
is proposed for amplify-and-forward (A&F) relays, where each relay is unaware of both the effective STBC being employed by the other nodes and the number of cooperating stations.  ...  In this paper, capitalizing on randomized STBC (RSTBC), a coding method which has been recently developed for decode-and-forward (D&F) relay nodes, a totally decentralized cooperative communication scheme  ...  In such a case, the noise is correlated at the destination, thus, under the assumption that realizations of h and Kd,L are perfectly known at the receiver, one-shot optimum ML decoding can be obtained  ... 
doi:10.1109/icassp.2010.5496119 dblp:conf/icassp/VerdeS10 fatcat:feg2umudkbajhbdm6xvcuilnxa

Impact of time-selective fading on the performance of quasi-orthogonal space-time-coded OFDM systems

Yu Zhang, Huaping Liu
2006 IEEE Transactions on Communications  
We quantify the impact of time-selective fading on the performance of quasi-orthogonal ST-OFDM systems by deriving, via an analytical approach, the expressions of carrier-to-interference and signal-to-interference-plus-noise  ...  In ST-OFDM, channel time variations cause not only intercarrier interference among different subcarriers in one OFDM symbol, but also intertransmit-antenna interference.  ...  ACKNOWLEDGMENT The authors would like to thank Professor D. S. Birkes for his help with the proof in the Appendix.  ... 
doi:10.1109/tcomm.2005.863773 fatcat:2qztdjyrnje3zd7uuaig3yvo2e

A Low-Complexity Approach to Space-Time Coding for Multipath Fading Channels

Mari Kobayashi, Giuseppe Caire
2005 EURASIP Journal on Wireless Communications and Networking  
In this way, the decoder complexity is independent of the channel memory and of the constellation size.  ...  We show that, in the limit of large block length, the TCM-TR-STBC scheme with reduced-state joint equalization and decoding can achieve the full diversity offered by the MISO multipath channel.  ...  The content of this paper was partially presented in WPMC'2003, Yokosuka, Japan, in 2003.  ... 
doi:10.1155/wcn.2005.437 fatcat:cd34qiqstzaq5ofwl7pgmmxpxq

Comparison of Code Rate and Transmit Diversity in 2×2 Mimo Systems

D. Churms, O.O. Ogundile, D.J.J. Versfeld
2016 SAIEE Africa Research Journal  
VBLAST operates on a single symbol at a time, multiplying the received vector by the inverse of the channel matrix and then cancelling decoded symbols.  ...  The impact of various channel models on the performance of the GS-KV decoder should be analysed.  ... 
doi:10.23919/saiee.2016.8532237 fatcat:lxyytafu45hink2yg2nprmemxy

Great Expectations: The Value of Spatial Diversity in Wireless Networks

S.N. Diggavi, N. Al-Dhahir, A. Stamoulis, A.R. Calderbank
2004 Proceedings of the IEEE  
In this paper, the effect of spatial diversity on the throughput and reliability of wireless networks is examined.  ...  Adopting spatial diversity as a central theme, we start by studying its information-theoretic foundations, then we illustrate its benefits across the physical (signal transmission/coding and receiver signal  ...  The authors would also like to thank the following individuals (in alphabetical order) for many stimulating discussions on the topics of this paper: C. Fragouli, X. Gao, M. Grossglauser, S.  ... 
doi:10.1109/jproc.2003.821914 fatcat:rdjeepkcqvgynddrnae5ik7loe

Non-Coherent Open-Loop MIMO Communications Over Temporally-Correlated Channels

Jorge Cabrejas, Sandra Roger, Daniel Calabuig, Yaser M. M. Fouad, Ramy H. Gohary, Jose F. Monserrat, Halim Yanikomeroglu
2016 IEEE Access  
These techniques perform data detection without knowing the instantaneous channel coefficients.  ...  His research focuses on the study of new mobile communications techniques focusing on non-coherent communications. He has been involved in the WINNER+ and METIS/METIS-II projects.  ...  ACKNOWLEDGEMENT The authors would like to acknowledge the contributions of their colleagues in METIS-II, although the views expressed are those of the authors and do not necessarily represent the project  ... 
doi:10.1109/access.2016.2580680 fatcat:snxrolgwn5akvkr2dpsow2j3ce

Space-Time Block Coding for Uplink Single-Carrier CDMA with Joint Detection in the Frequency Domain

Francois Horlin, Eduardo Lopez-Estraviz, Liesbet Van Der Perre
2007 IEEE Transactions on Wireless Communications  
It enables the high capacity intrinsically offered by CDMA by making the equalization of the multipath channels and the mitigation of the resulting interference possible at a low complexity.  ...  Contrary to existing air interfaces that perform the STBC at the chip level, making them only applicable to the downlink, the STBC is performed at the symbol level, making it also applicable to the uplink  ...  Fig. 9 . 9 Impact of the speed on SC-CDMA and on SCBS-CDMA with STBC 2x1. Fig. 10 . 10 Impact of user load on SC-CDMA with STBC 2x1.  ... 
doi:10.1109/twc.2007.05622 fatcat:cipnp6dft5grxjv7nkimuxa55i

Signal Processing by Generalized Receiver Using DS-CDMA with STBC Technology in Multidimensional Systems over Fading Channels: Capacity and Error Probability

2020 WSEAS Transactions on Communications  
to the Frobenius norm of the matrix channel for the STBC.  ...  The suggested approach is based on employment of the generalized approach to signal processing in noise over the equivalent scalar additive white Gaussian noise channel with a channel gain proportional  ...  Assuming maximum likelihood (ML) soft decoding with per- fect channel state information at the receiver input, it is well known [14]-[16] that the capacity * STBC C of the STBC channel (7) can  ... 
doi:10.37394/23204.2020.19.15 fatcat:f65az7w4wrebroch2owoobvbsy

Near-Capacity Wireless Transceivers and Cooperative Communications in the MIMO Era: Evolution of Standards, Waveform Design, and Future Perspectives

Lajos Hanzo, Mohammed El-Hajjar, Osamah Alamri
2011 Proceedings of the IEEE  
Communications in the MIMO 4 Era: Evolution of Standards, 5 Waveform Design, and 6 Future Perspectives 7 Multiple-input-multiple-output (MIMO) techniques said to promise to deliver speed 8 volume and reliability  ...  needed by current wireless communication systems are 9 discussed and the status of wireless baseband transceiver design is reviewed.  ...  transceivers and its accuracy has a grave impact on the achievable BER.  ... 
doi:10.1109/jproc.2011.2148150 fatcat:h5figg46rfdfngebjrbmyyekle
« Previous Showing results 1 — 15 out of 175 results