Reference Signal Transmission Schemes for Coordinated Multi-Point Transmission for 3GPP LTE-Advanced

Masayuki HOSHINO   Tadashi YOSHIDA   Daichi IMAMURA   

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.12   pp.3346-3353
Publication Date: 2011/12/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Cooperative Communications for Cellular Networks)
Category: 
Keyword: 
MIMO ,  coordinated multi-point transmission ,  reference signal ,  LTE-Advanced ,  

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Summary: 
In this study, we investigate reference signal (RS) transmission schemes that aim to efficiently support coordinated multi-point (CoMP) transmission by providing improved channel estimation accuracy so that transmission parameters can be appropriately chosen on a cellular network. First, we investigate typical scenarios for transmission parameter selection with the widely used CoMP transmission and precoding schemes aligned with those considered for Long Term Evolution (LTE)-Advanced systems. Second, we investigate an RS transmission scheme that can provide accurate channel estimation even with severe inter-cell interference. Finally, we verify the performance benefit of the investigated scheme by a multi-cell link level evaluation. The results obtained indicate: 1) the investigated scheme improves block error rate performance compared to conventional schemes for fixed modulation and coding schemes (MCSs) allocation with a better precoding control accuracy on the LTE-Advanced system downlink and 2) the investigated scheme provides a throughput performance gain compared to conventional schemes for adaptive MCS allocation and coordinated beamforming.