Single-Cell vs. Multicell MIMO Downlink Signalling Strategies with Imperfect CSI

This paper considers multi-antenna downlink communication with base stations (BSs) that perform joint transmitter null-space decomposition (JT-decomp) and conventional single-cell linear precoding strategies under imperfect channel state information (CSI). Upper bounds for the rate loss of JT-decomp precoding and conventional cellular systems are first provided, which demonstrate that unlike conventional systems, the percentage rate loss of JT-decomp cooperative base station (BS) system decreases as signal-to-noise ratio (SNR) increases. This shows that JT-decomp precoding, in spite of the imperfect CSI, preserves its spatial multiplexing gain at high SNR. Accurate closed-form analytical expressions for the net ergodic achievable rate and the rate loss under erroneous CSI of the JT-decomp cooperative BS system are also derived.

[1]  Emil Björnson,et al.  Distributed Multicell and Multiantenna Precoding: Characterization and Performance Evaluation , 2009, GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference.

[2]  Gerhard Fettweis,et al.  On Uplink Network MIMO under a Constrained Backhaul and Imperfect Channel Knowledge , 2009, 2009 IEEE International Conference on Communications.

[3]  Steven D. Blostein,et al.  A hybrid signalling scheme for cellular mobile networks over flat fading , 2010, 2010 25th Biennial Symposium on Communications.

[4]  Antonia Maria Tulino,et al.  Capacity of multiple-transmit multiple-receive antenna architectures , 2002, IEEE Trans. Inf. Theory.

[5]  Steven D. Blostein,et al.  MIMO Minimum Total MSE Transceiver Design With Imperfect CSI at Both Ends , 2009, IEEE Transactions on Signal Processing.

[6]  Huaiyu Dai,et al.  Cochannel Interference Mitigation and Cooperative Processing in Downlink Multicell Multiuser MIMO Networks , 2004, EURASIP J. Wirel. Commun. Netw..

[7]  Martin Haardt,et al.  Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels , 2004, IEEE Transactions on Signal Processing.

[8]  Reinaldo A. Valenzuela,et al.  Network coordination for spectrally efficient communications in cellular systems , 2006, IEEE Wireless Communications.

[9]  Antonia Maria Tulino,et al.  Analysis of cooperative MIMO networks with incomplete channel state information , 2008, 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications.

[10]  Lars Thiele,et al.  Distributed Base Station Cooperation via Block-Diagonalization and Dual-Decomposition , 2008, IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference.

[11]  Thomas L. Marzetta,et al.  BLAST training : Estimating Channel Characteristics for High-Capacity Space-Time Wireless , 1999 .

[12]  Shlomo Shamai,et al.  Enhancing the cellular downlink capacity via co-processing at the transmitting end , 2001, IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202).