TY - GEN
T1 - Downlink MIMO with frequency-domain packet scheduling for 3GPP LTE
AU - Lee, Suk Bok
AU - Choudhury, Sayantan
AU - Khoshnevis, Ahmad
AU - Xu, Shugong
AU - Lu, Songwu
PY - 2009
Y1 - 2009
N2 - This paper addresses the problem of frequency domain packet scheduling (FDPS) incorporating spatial division multiplexing (SDM) multiple input multiple output (MIMO) techniques on the 3GPP Long Term Evolution (LTE) downlink. We impose the LTE MIMO constraint of selecting only one MIMO mode (spatial multiplexing or transmit diversity) per user per transmission time interval (TTI). First, we address the optimal MIMO mode selection (multiplexing or diversity) per user in each TTI in order to maximize the proportional fair (PF) criterion extended to frequency and spatial domains. We prove that the SU-MIMO (single-user MIMO) FDPS problem under the LTE requirement is NP-hard and therefore, we develop two approximation algorithms (one with full channel feedback and the other with partial channel feedback) with provable performance bounds. Based on 3GPP LTE system model simulations, the approximation algorithm with partial channel feedback is shown to have comparable performance to the one with full channel feedback, while significantly reducing the channel feedback overhead by nearly 50%.
AB - This paper addresses the problem of frequency domain packet scheduling (FDPS) incorporating spatial division multiplexing (SDM) multiple input multiple output (MIMO) techniques on the 3GPP Long Term Evolution (LTE) downlink. We impose the LTE MIMO constraint of selecting only one MIMO mode (spatial multiplexing or transmit diversity) per user per transmission time interval (TTI). First, we address the optimal MIMO mode selection (multiplexing or diversity) per user in each TTI in order to maximize the proportional fair (PF) criterion extended to frequency and spatial domains. We prove that the SU-MIMO (single-user MIMO) FDPS problem under the LTE requirement is NP-hard and therefore, we develop two approximation algorithms (one with full channel feedback and the other with partial channel feedback) with provable performance bounds. Based on 3GPP LTE system model simulations, the approximation algorithm with partial channel feedback is shown to have comparable performance to the one with full channel feedback, while significantly reducing the channel feedback overhead by nearly 50%.
UR - http://www.scopus.com/inward/record.url?scp=70349659565&partnerID=8YFLogxK
U2 - 10.1109/INFCOM.2009.5062041
DO - 10.1109/INFCOM.2009.5062041
M3 - Conference Proceeding
AN - SCOPUS:70349659565
SN - 9781424435135
T3 - Proceedings - IEEE INFOCOM
SP - 1269
EP - 1277
BT - IEEE INFOCOM 2009 - The 28th Conference on Computer Communications
T2 - 28th Conference on Computer Communications, IEEE INFOCOM 2009
Y2 - 19 April 2009 through 25 April 2009
ER -