Optimum pilot overhead in wireless communication: a unified treatment of continuous and block-fading channels
Optimum pilot overhead in wireless communication: a unified treatment of continuous and block-fading channels
Citació
- Lozano A, Jindal N. Optimum pilot overhead in wireless communication: a unified treatment of continuous and block-fading channels. In: 16th European Wireless Conference 2010 (EW '10); 2010 Apr 12-15; Lucca, Italy. [S.l.]: IEEE; c2010. p. 725-732. DOI 10.1109/EW.2010.5483526
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Descripció
Resum
The optimization of the pilot overhead in wireless fading channels is investigated, and the dependence of this overhead on various system parameters of interest (e.g., fading rate, signal-to-noise ratio) is quantified. The achievable pilot-based spectral efficiency is expanded with respect to the fading rate about the no-fading point, which leads to an accurate order expansion for the pilot overhead. This expansion identifies that the pilot overhead, as well as the spectral efficiency penalty with respect to a reference system with genie-aided CSI (channel state information) at the receiver, depend on the square root of the normalized Doppler frequency. It is also shown that the widely-used/nblock fading model is a special case of more accurate continuous fading models in terms of the achievable pilot-based spectral efficiency. Furthermore, it is established that the overhead optimization for multiantenna systems is effectively the same as for single-antenna systems with the/nnormalized Doppler frequency multiplied by the number of transmit antennas.Descripció
Comunicació presentada en la 16th European Wireless Conference 2010 (EW '10), celebrada els dies 12, 13, 14 i 15 d’abril de 2010 a Lucca (Itàlia), organitzada per l’IMT Institute for Advanced Studies.