Low complexity frequency offset estimation in the presence of DC offset

Author

Ho, Chin Keong ; Sun, Sumei ; He, Ping

Author_Institution

Inst. for Infocomm Res., Singapore, Singapore

Volume

3

fYear

2003

fDate

11-15 May 2003

Firstpage

2051

Abstract

This paper describes how to perform low complexity frequency offset estimation in the presence of direct current (DC) offset based on a received periodic preamble. By designing a suitable preamble, we perform frequency and DC offsets estimation concurrently, followed by a simple compensator which reduces the frequency offset error induced by the presence of either a residual or actual DC offset. Its performance is illustrated based on the preamble of a wireless LAN system defined in IEEE 802.11a, as well as another preamble design that offers additional performance gain. Compared to the case when no compensator is used, the proposed solution gives superior performance over a wide range of DC offset power in both AWGN and multipath quasi-static channels.

Keywords

AWGN channels; data communication; frequency estimation; multipath channels; personal communication networks; radio receivers; wireless LAN; AWGN channels; IEEE 802.11a; actual DC offset; additive white Gaussian noise; compensator; concurrent frequency offset; direct current offset; error reduction; local area network; low complexity frequency offset estimation; multipath quasistatic channels; performance gain; personal communication services; received periodic preamble; residual DC offset; wireless LAN system; AWGN; Degradation; Frequency estimation; Helium; Multipath channels; OFDM; Performance gain; Personal communication networks; Sun; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2003. ICC '03. IEEE International Conference on

Print_ISBN

0-7803-7802-4

Type

conf

DOI

10.1109/ICC.2003.1203979

Filename

1203979