TY - GEN
T1 - Maximum-diversity transmissions over time-selective wireless channels
AU - Ma, Xiaoli
AU - Giannakis, Georgios B.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - Carrier frequency-offsets and mobility-induced Doppler shifts introduce time-selectivity in wireless links. Doppler-RAKE receivers have been developed for collecting the resulting diversity gains only for spread-spectrum systems. Relying on a basis expansion model of time-selective channels, we find that the maximum achievable Doppler diversity is determined by the rank of the correlation matrix of the channel's expansion coefficients. We also prove that RAKE reception can not collect maximum diversity gains, unless the transmission is appropriately designed. Finally, we design such block precoded transmissions to ensure maximum diversity gains, and provide thorough simulations to corroborate our theoretical findings.
AB - Carrier frequency-offsets and mobility-induced Doppler shifts introduce time-selectivity in wireless links. Doppler-RAKE receivers have been developed for collecting the resulting diversity gains only for spread-spectrum systems. Relying on a basis expansion model of time-selective channels, we find that the maximum achievable Doppler diversity is determined by the rank of the correlation matrix of the channel's expansion coefficients. We also prove that RAKE reception can not collect maximum diversity gains, unless the transmission is appropriately designed. Finally, we design such block precoded transmissions to ensure maximum diversity gains, and provide thorough simulations to corroborate our theoretical findings.
UR - http://www.scopus.com/inward/record.url?scp=0037767806&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037767806&partnerID=8YFLogxK
U2 - 10.1109/WCNC.2002.993547
DO - 10.1109/WCNC.2002.993547
M3 - Conference contribution
AN - SCOPUS:0037767806
T3 - IEEE Wireless Communications and Networking Conference, WCNC
SP - 497
EP - 501
BT - IEEE Wireless Communications and Networking Conference, WCNC
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2002 IEEE Wireless Communications and Networking Conference, WCNC 2002
Y2 - 17 March 2002 through 21 March 2002
ER -