On Channel Estimation for 802.11p in Highly Time-Varying Vehicular Channels
Paper i proceeding, 2014

Vehicular wireless channels are highly time-varying and the pilot pattern in the 802.11p orthogonal frequency-division multiplexing frame has been shown to be ill suited for long data packets. The high frame error rate in off-the-shelf chipsets with noniterative receiver configurations is mostly due to the use of outdated channel estimates for equalization. This paper deals with improving the channel estimation in 802.11p systems using a cross layered approach, where known data bits are inserted in the higher layers and a modified receiver makes use of these bits as training data for improved channel estimation. We also describe a noniterative receiver configuration for utilizing the additional training bits and show through simulations that frame error rates close to the case with perfect channel knowledge can be achieved.

Channel Estimation

V2V

802.11p

Cross Layer

V2X

Vehicular communications

Författare

Keerthi Nagalapur

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Fredrik Brännström

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Erik Ström

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

IEEE International Conference on Communications (ICC), 10-14 June 2014

5659--5664- 6884223

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Kommunikationssystem

DOI

10.1109/ICC.2014.6884223

ISBN

978-147992003-7