Title :
Estimation of performance loss due to delay in channel feedback in MIMO systems
Author :
Du, Jianxuan ; Li, YeGeoffrey ; Gu, Daqing ; Molisch, Andreas F. ; Zhang, Jinyun
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Latency of available channel state information (CSI) at the transmitter in time-varying channels greatly affects the performance of multiple-input multiple-output (MIMO) systems. We have derived a simple algorithm to calculate an approximation of the expected performance loss based on the most recent channel feedback. The proposed algorithm can be used to determine the maximum tolerable channel feedback delay for each particular channel realization.
Keywords :
MIMO systems; delays; feedback; parameter estimation; radio transmitters; time-varying channels; MIMO systems; channel feedback delay; channel state information; multiple-input multiple-output systems; performance loss estimation; time-varying channels; transmitter; wireless communication systems; Autocorrelation; Channel state information; Delay estimation; Feedback; MIMO; Performance loss; Random variables; Receiving antennas; Time-varying channels; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400308
