TY - GEN
T1 - Three-user MISO broadcast channel
T2 - IEEE International Conference on Communications, ICC 2015
AU - Lashgari, Sina
AU - Tandon, Ravi
AU - Avestimehr, Salman
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/9/9
Y1 - 2015/9/9
N2 - We study the impact of heterogeneity of channel state information available to the transmitters (CSIT) on the performance of multi-antenna multi-user wireless networks. More specifically, we consider the 3-user multiple-input single-output (MISO) broadcast channel, where the available CSIT with respect to each receiver can be instantaneous (P), delayed (D), or none (N); and we characterize the extent to which such heterogeneity of CSIT impacts its linear degrees of freedom (LDoF). In particular, we completely characterize the DoF region for all possible CSIT configurations, assuming linear encoding strategies at the transmitters. The converse, which is the main contribution of the paper, is based on a novel lemma, called Interference Decomposition Bound, which provides a lower bound on the interference dimension at a receiver with delayed CSIT, based on the dimension of constituents of that interference, thereby decomposing the interference into its individual components.
AB - We study the impact of heterogeneity of channel state information available to the transmitters (CSIT) on the performance of multi-antenna multi-user wireless networks. More specifically, we consider the 3-user multiple-input single-output (MISO) broadcast channel, where the available CSIT with respect to each receiver can be instantaneous (P), delayed (D), or none (N); and we characterize the extent to which such heterogeneity of CSIT impacts its linear degrees of freedom (LDoF). In particular, we completely characterize the DoF region for all possible CSIT configurations, assuming linear encoding strategies at the transmitters. The converse, which is the main contribution of the paper, is based on a novel lemma, called Interference Decomposition Bound, which provides a lower bound on the interference dimension at a receiver with delayed CSIT, based on the dimension of constituents of that interference, thereby decomposing the interference into its individual components.
UR - http://www.scopus.com/inward/record.url?scp=84953713220&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84953713220&partnerID=8YFLogxK
U2 - 10.1109/ICC.2015.7248980
DO - 10.1109/ICC.2015.7248980
M3 - Conference contribution
AN - SCOPUS:84953713220
T3 - IEEE International Conference on Communications
SP - 4187
EP - 4192
BT - 2015 IEEE International Conference on Communications, ICC 2015
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 8 June 2015 through 12 June 2015
ER -