A novel preamble scheme for packet-based OFDM WLAN
conference paper
In packet-based OFDM WLAN systems (IEEE 802.11a/g/n), each packet has a fixed-length preamble for synchronization and channel estimation purposes. The preamble carries no data information and hence causes considerable overhead during transmission when the payload is short and the data rate is high. In this work, we propose a new scheme, called superimposed preamble, to improve the efficiency of 802.11a alike systems. We design a new signal structure using variable data rate and propose an efficient receiver processing scheme to perform joint training (time and frequency synchronization and channel estimation) and data detection. It is shown that the proposed superimposed preamble system achieves training performance similar to the conventional 802.11a systems while gaining in robustness because of the reduced overhead. © 2007 IEEE.
Topics
TNO Identifier
240311
ISSN
15253511
ISBN
1424406595
9781424406593
9781424406593
Article nr.
No.: 4204455
Source title
2007 IEEE Wireless Communications and Networking Conference, WCNC 2007, 11 March 2007 through 15 March 2007, Kowloon, Conference code: 70638
Pages
1483-1487
Files
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