Semi-Blind Channel Estimation Using Superimposed Training Sequences with Constant Magnitude in Dual Domain for OFDM Systems

Author

Li, Chih-Peng ; Huang, Wei-Chieh

Author_Institution

Inst. of Commun. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung

Volume

4

fYear

2006

fDate

7-10 May 2006

Firstpage

1575

Lastpage

1579

Abstract

A superimposed training scheme is proposed for channel estimation in OFDM systems. The generalized chirp-like (GCL) sequence is adopted since it has a constant magnitude in both the time domain and the frequency domain. Although the derived channel estimator has a slightly worse performance since the unknown data contributes extra noise, the effective data throughput is substantially increased. In addition, the proposed scheme is shown to have a much better peak-to-average power ratio (PAPR) because the added GCL sequence has a constant magnitude in the time domain

Keywords

OFDM modulation; channel estimation; fading channels; GCL sequence; OFDM systems; PAPR; fading channel; generalized chirp-like sequence; orthogonal frequency division multiplexing; peak-to-average power ratio; semi-blind channel estimation; superimposed training sequences; Channel estimation; Chirp; Demodulation; Fading; Frequency domain analysis; Frequency estimation; Intersymbol interference; OFDM; Peak to average power ratio; Throughput; Channel estimation; PAPR; chirp-like sequence; superimposed training;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2006. VTC 2006-Spring. IEEE 63rd

Conference_Location

Melbourne, Vic.

ISSN

1550-2252

Print_ISBN

0-7803-9391-0

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2006.1683111

Filename

1683111