TY - GEN
T1 - Degrees of freedom of MISO broadcast channel with perfect delayed and imperfect current CSIT
AU - Yang, Sheng
AU - Kobayashi, Mari
AU - Gesbert, David
AU - Yi, Xinping
PY - 2012
Y1 - 2012
N2 - We consider the two-user MISO broadcast channel where the transmitter has imperfect knowledge on the current channel state, in addition to delayed channel state information. The degree of freedom region is completely characterized. The optimal scheme smoothly bridges between the scheme recently proposed by Maddah-Ali and Tse with no current state information and a simple zero-forcing beamforming with perfect current state information. The essential ingredients of this scheme lie in the quantization and multicasting of the overheard interferences, while broadcasting new private messages.
AB - We consider the two-user MISO broadcast channel where the transmitter has imperfect knowledge on the current channel state, in addition to delayed channel state information. The degree of freedom region is completely characterized. The optimal scheme smoothly bridges between the scheme recently proposed by Maddah-Ali and Tse with no current state information and a simple zero-forcing beamforming with perfect current state information. The essential ingredients of this scheme lie in the quantization and multicasting of the overheard interferences, while broadcasting new private messages.
UR - http://www.scopus.com/inward/record.url?scp=84873191661&partnerID=8YFLogxK
U2 - 10.1109/ITW.2012.6404741
DO - 10.1109/ITW.2012.6404741
M3 - Conference contribution
AN - SCOPUS:84873191661
SN - 9781467302234
T3 - 2012 IEEE Information Theory Workshop, ITW 2012
SP - 577
EP - 581
BT - 2012 IEEE Information Theory Workshop, ITW 2012
PB - IEEE Computer Society
T2 - 2012 IEEE Information Theory Workshop, ITW 2012
Y2 - 3 September 2012 through 7 September 2012
ER -