Constellation Selection in Network Coded Distributive Antenna System
2009 (English)In: GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference / [ed] Ulema M, IEEE , 2009, 342-346 p.Conference paper (Refereed)
Relays can improve wireless links by providing an extra path to the direct path which together form a virtual multiple antenna system. Network Coded-Distributive Antenna System (NC-DAS) and Plain-Distributive Antenna System (P-DAS) are examples of realizations of such scenario. Although the asymptotic diversity gain for both the schemes is comparable, the network coded scheme can further take advantage of the redundancy and the extra dimension provided by the relay link. This extra signal dimension can be very useful when multilevel modulation is employed as it gives the possibility for a better spread of the modulation signal points within the augmented signal space. This article presents a simple and effective Constellation Selection (CS) scheme for all the three links within the NC-DAS system. This selection procedure improves the bit error probability in both AWGN and Rayleigh fading channels. Two different detections schemes are considered in the paper. Joint detection where the both users are decoded simultaneously and detection with successive cancelation where the strongest user is detected first followed by cancelation and maximum ratio combining. Analytical expressions for the error probability supported by simulation results are presented. The obtained results show that constellation selection provides good performance gain as compared to the case of same constellation.
Place, publisher, year, edition, pages
IEEE , 2009. 342-346 p.
, IEEE Global Telecommunications Conference (Globecom), ISSN 1930-529X
Analytical expressions, Antenna system, Bit error probability, Coded schemes, Direct paths, Diversity gain, Error probabilities, Extra dimensions, In-network, Joint detection, Maximum ratio combining, Modulation signals, Multilevel modulation, Multiple antenna systems, Performance Gain, Relay links, Selection procedures, Signal dimensions, Signal spaces, Simulation result, Three links, Wireless link
Other Electrical Engineering, Electronic Engineering, Information Engineering Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-29615DOI: 10.1109/GLOCOM.2009.5425376ISI: 000280579100057ScopusID: 2-s2.0-77951556127ISBN: 978-1-4244-4147-1OAI: oai:DiVA.org:kth-29615DiVA: diva2:401212
2009 IEEE Global Telecommunications Conference, GLOBECOM 2009; Honolulu, HI; United States; 30 November 2009 through 4 December 2009
QC 201103012011-03-012011-02-112014-09-26Bibliographically approved