Title :
On the pilot spacing constraints for continuous time-varying fading channels
Author :
Savazzi, Stefano ; Spagnolini, Umberto
Author_Institution :
Dipt. di Elettron. e Inf., Politec. di Milano, Milano, Italy
Abstract :
In common wireless systems pilot placing can be interpreted as a way to sample the channel with some degree of accuracy. In this letter we investigate the necessary conditions on the pilots spacing for time-varying fading to guarantee a specified average bit error rate. These constraints are evaluated in closed form for large SNR and small fading dynamics and specialized for varying fading correlation and coded/uncoded binary transmissions.
Keywords :
error statistics; fading channels; radiocommunication; average bit error rate; coded-uncoded binary transmissions; continuous time-varying fading channels; fading dynamics; wireless systems pilot placing; Binary phase shift keying; Bit error rate; Channel estimation; Delay estimation; Fading; Frequency estimation; Sampling methods; Signal to noise ratio; Time varying systems; Wireless communication; MMSE channel estimation, pilot spacing, timevarying fading channels, training-based channel estimation;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2009.11.080024
