Abstract
Long Term Evolution (LTE) standards define a fixed diamond shaped pilot pattern over the time frequency grid in the downlink for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) transmission systems. While the choice of the pattern is a compromise to cover a wide range of channels with different Root Mean Square (RMS) delays and Doppler spreads, it is also selected sparsely not to hamper capacity.
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Notes
- 1.
The material presented here can be accessed in more detail in the Ph.D. thesis of Michal Šimko available for download at http://theses.eurasip.org/theses/488/pilot-pattern-optimization-for-doubly-selective/.
References
J. Choi, Y. Lee, Optimum pilot pattern for channel estimation in OFDM systems. IEEE Trans. Wirel. Commun. 4(5), 2083–2088 (2005). doi:10.1109/TWC.2005.853891
M. Šimko, C. Mehlführer, M. Wrulich, M. Rupp, Doubly Dispersive Channel Estimation with Scalable Complexity, in Proceedings of the 14th International ITG Workshop on Smart Antennas (WSA 2010), Bremen (2010), pp. 251–256. doi:10.1109/WSA.2010.5456443
M. Šimko, S. Pendl, S. Schwarz, Q. Wang, J.C. Ikuno, M. Rupp, Optimal pilot symbol power allocation in LTE, in Proceedings of the 74th IEEE Vehicular Technology Conference (VTC2011-Fall), San Francisco (2011). doi:10.1109/VETECF.2011.6092929
M. Šimko, Pilot pattern optimization for doubly-selective MIMO OFDM transmissions, Ph.D. Thesis, TU Wien, 2013
S. Omar, A. Ancora, D. Slock, Performance analysis of general pilot-aided linear channel estimation in LTE OFDMA systems with application to simplified MMSE schemes, in Proceedings of the IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC 2008), Cannes (2008), pp. 1–6. doi:10.1109/PIMRC.2008.4699619
M. Šimko, M. Rupp, Optimal pilot symbol power allocation in multi-cell scenarios of LTE, in Conference Record of the Fourtyfifth Asilomar Conference on Signals, Systems and Computers, Pacific Grove (2011)
D. Gore, R. Heath Jr., A. Paulraj, On performance of the zero forcing receiver in presence of transmit correlation, in Proceedings of the IEEE International Symposium on Information Theory (ISIT 2002), Lausanne (2002), p. 159. doi:10.1109/ISIT.2002.1023431
P. Li, D. Paul, R. Narasimhan, J. Cioffi, On the distribution of SINR for the MMSE MIMO receiver and performance analysis. IEEE Trans. Inf. Theory 52(1), 271–286 (2006). doi:10.1109/TIT.2005.860466
ITU, Recommendation ITU-R M.1225: Guidelines for evaluation of radio transmission technologies for IMT-, systems, International Telecommunication Union, 1998 (2000)
M. Šimko, Q. Wang, and M. Rupp, Optimal pilot symbol power allocation under time-variant channels, EURASIP J. Wirel. Commun. Netw. (2012). doi:10.1186/1687-1499-2012-225
C. Mehlführer, S. Caban, M. Rupp, Cellular system physical layer throughput: how far off are we from the Shannon bound? IEEE Wirel. Commun. 18(6), 54–63 (2011). doi:10.1109/MWC.2011.6108334
S. Schwarz, M. Šimko, M. Rupp, On performance bounds for MIMO OFDM based wireless communication systems, in Proceedings of the IEEE Signal Processing Advances in Wireless Communications, San Francisco (2011)
M. Rupp, J. Garcia-Naya, C. Mehlführer, S. Caban, L. Castedo, On mutual information and capacity in frequency selective wireless channels, in Proceedings of the IEEE International Conference on Communications (ICC 2010), Cape Town (2010). doi:10.1109/ICC.2010.5501942
A. Forenza, M. McKay, A. Pandharipande, R. Heath, I. Collings, Adaptive MIMO transmission for exploiting the capacity of spatially correlated channels. IEEE Trans. Veh. Technol. 56(2), 619–630 (2007). doi:10.1109/TVT.2007.891427
S. Loyka, A. Kouki, New compound upper bound on MIMO channel capacity. IEEE Commun. Lett. 6(3), 96–98 (2002). doi:10.1109/4234.991144
K. Hassan, T. Rahman, M. Kamarudin, F. Nor, The mathematical relationship between maximum access delay and the RMS delay spread, in Proceedings of the 7th International Conference on Wireless and Mobile Communications (ICWMC 2011), Luxembourg (2011), pp. 18–23
T. Zemen, C. Mecklenbräuker, Time-variant channel estimation using discrete prolate spheroidal sequences. IEEE Trans. Signal Process. 53(9), 3597–3607 (2005). doi:10.1109/TSP.2005.853104
M. Šimko, P.S.R. Diniz, Q. Wang, M. Rupp, Adaptive pilot-symbol patterns for MIMO OFDM systems. IEEE Trans. Wirel. Commun. 12(9), 4705–4715 (2013)
M. Šimko, P.S.R. Diniz, M. Rupp, Design requirements of adaptive pilot-symbol patterns, in Proceedings of the ICC Workshop: beyond LTE-A, Budapest (2013)
M. Šimko, Q. Wang, M. Rupp, Optimal pilot pattern for time variant channels, in Proceedings of the IEEE International Conference on Communications (ICC 2013), Budapest (2013)
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Šimko, M. (2016). Optimal Pilot Pattern for Downlink Transmissions. In: The Vienna LTE-Advanced Simulators. Signals and Communication Technology. Springer, Singapore. https://doi.org/10.1007/978-981-10-0617-3_4
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DOI: https://doi.org/10.1007/978-981-10-0617-3_4
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