Enhanced time synchronization in IEEE 802.11a system using SIGNAL field and MAP channel estimation

Cong Luong Nguyen (1) , Anissa Mokraoui (1) , Pierre Duhamel (2) , Linh Trung Nguyen (3)

1 L2TI - Laboratoire de Traitement et Transport de l'Information
2 L2S - Laboratoire des signaux et systèmes
3 College of Technology Hanoi

This paper addresses the problem of time synchronization in the IEEE 802.11a OFDM wireless communication system.In addition to the reference sequence usually used in conventional algorithms, recently the SIGNAL field of the physical packet has been exploited to improve the coarse time synchronization. To increase the performance of the fine time synchronization, we propose to use joint time synchronization and channel estimation based on the Maximum A Posteriori Probability criterion. Simulation results show that the probability of synchronization failure of the proposed synchronization algorithm is reduced as compared to existing methods.

Domaines: Réseaux et télécommunications [cs.NI]; Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Cong Luong Nguyen, Anissa Mokraoui, Pierre Duhamel, Linh Trung Nguyen. Enhanced time synchronization in IEEE 802.11a system using SIGNAL field and MAP channel estimation. ATC 2012, Oct 2012, Hanoi, Vietnam. pp.46-49, ⟨10.1109/ATC.2012.6404226⟩. ⟨hal-00805741⟩