TY - GEN
T1 - Analysis of MIMO beamforming with channel response variations over the frame interval
AU - Martos-Naya, Eduardo
AU - Paris, José F.
AU - Fernández-Plazaola, Unai
AU - Goldsmith, Andrea J.
PY - 2007
Y1 - 2007
N2 - Important throughput improvements in multipleinput multiple-output (MIMO) fading channels can be obtained by merging beamforming at the transmitter and maximal ratio combining (MRC) at the receiver. However, to attain these performance gains it is important to obtain accurate channel state information (CSI). For this purpose a channel estimation technique is used at the receiver: channel prediction to feed back to the transmitter for beamforming, and channel interpolation for MRC at the receiver. In this paper, the impact of imperfect channel prediction on bit error probability (BEP) is analyzed in Rayleigh fading, taking into account the channel response variations over the frame interval. An exact closed-form expression for BEP is obtained, and we evaluate this expression assuming both time-variant and time-invariant channel models. These results indicate that the BEP performance degrades on the order of 1.5 dB due to channel variations.
AB - Important throughput improvements in multipleinput multiple-output (MIMO) fading channels can be obtained by merging beamforming at the transmitter and maximal ratio combining (MRC) at the receiver. However, to attain these performance gains it is important to obtain accurate channel state information (CSI). For this purpose a channel estimation technique is used at the receiver: channel prediction to feed back to the transmitter for beamforming, and channel interpolation for MRC at the receiver. In this paper, the impact of imperfect channel prediction on bit error probability (BEP) is analyzed in Rayleigh fading, taking into account the channel response variations over the frame interval. An exact closed-form expression for BEP is obtained, and we evaluate this expression assuming both time-variant and time-invariant channel models. These results indicate that the BEP performance degrades on the order of 1.5 dB due to channel variations.
UR - http://www.scopus.com/inward/record.url?scp=39349110406&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=39349110406&partnerID=8YFLogxK
U2 - 10.1109/GLOCOM.2007.307
DO - 10.1109/GLOCOM.2007.307
M3 - Conference contribution
AN - SCOPUS:39349110406
SN - 1424410436
SN - 9781424410439
T3 - GLOBECOM - IEEE Global Telecommunications Conference
SP - 1597
EP - 1601
BT - IEEE GLOBECOM 2007 - 2007 IEEE Global Telecommunications Conference, Proceedings
T2 - 50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007
Y2 - 26 November 2007 through 30 November 2007
ER -