Joint channel and Doppler shift estimation in TDS-OFDM using frequency sensitive set

Author

Jinxing Hao ; Jintao Wang ; Jian Song

Author_Institution

Dept. of Electron. Eng., Tsinghua Univ., Beijing, China

fYear

2014

fDate

25-27 June 2014

Firstpage

1

Lastpage

4

Abstract

Time-varying channel always plays great obstacle to OFDM (orthogonal frequency domain modulation) as it introduces intercarrier interference (ICI). In terrestrial digital television broadcasting systems, residual Doppler shift may exist and deteriorate the orthogonality of subcarrier signal, especially during high-speed transportation such as high-speed railways. This paper proposed a jointly Doppler and channel estimation method originated from conventional sparse channel estimation in time-domain synchronized OFDM (TDS-OFDM) scheme, which shows a promising technique to further combat ICI without compromising on spectral efficiency.

Keywords

Doppler shift; OFDM modulation; channel estimation; digital television; intercarrier interference; television broadcasting; Doppler shift estimation; ICI; TDS-OFDM; channel estimation method; conventional sparse channel estimation; frequency sensitive set; high-speed railways; high-speed transportation; intercarrier interference; joint channel estimation; jointly Doppler estimation method; orthogonal frequency domain modulation; spectral efficiency; subcarrier signal orthogonality; terrestrial digital television broadcasting systems; time varying channel; Channel estimation; Delays; Dictionaries; Doppler shift; Estimation; OFDM; : Time-varying channel estimation; sparse estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Broadband Multimedia Systems and Broadcasting (BMSB), 2014 IEEE International Symposium on

Conference_Location

Beijing

Type

conf

DOI

10.1109/BMSB.2014.6873568

Filename

6873568