Title :
How often channel estimation is needed in MIMO systems
Author :
Pohl, Volker ; Nguyen, Phuc H. ; Jungnickel, Volker ; Von Helmolt, Clemens
Author_Institution :
Heinrich-Hertz-Inst., Fraunhofer Inst. for Telecommun., Germany
Abstract :
In this paper we develop a unique framework for evaluating the required repetition rate of channel estimation for multiple-input multiple-output (MIMO) systems in continuous fading radio channels. An analytical formula for the interference due to the temporal variation of the channel coefficients is given. This makes it possible to evaluate the time interval in which the channel has to be estimated again in order to keep the error probability below a desired threshold. This interval depends not only on the Doppler spread of the channel but also on the antenna configuration, detection algorithm and modulation scheme.
Keywords :
Doppler effect; MIMO systems; antenna arrays; channel estimation; error statistics; fading channels; modulation; radio links; radiofrequency interference; Doppler spread; MIMO system; antenna configuration; channel coefficient temporal variation; channel estimation; continuous fading radio channel; detection algorithm; error probability; interference; modulation scheme; multiple-input multiple-output system; repetition rate evaluation; Bit error rate; Channel estimation; Delay effects; Detection algorithms; Electronic mail; Fading; Frequency; Interference; MIMO; Random variables;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258352
