Parallel-Filtering Based Equalization of OFDM over Doubly Selective Channels

Author

Liu, Guanghui ; Li, Hongliang ; Chen, Wei ; Wang, Mingzhen ; Wang, Lin

Author_Institution

Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2010

fDate

6-10 Dec. 2010

Firstpage

1

Lastpage

5

Abstract

Time selectivity of multipath channels severely degrades the performance of OFDM systems. In this paper, a piece-wise channel approximation is presented for improving the structure of the frequency-domain channel gain matrix. The proposed model is exploited to simplify the zero-forcing (ZF) equalizer as a parallel-filtering implementation with very low complexity. The linearized case of the parallel-filtering based equalizer is studied and applied to the DVB-H receiver design. The simulation indicates that the developed equalizer enforces considerably the immunity of the DVB-H receiver to the time selectivity with very little complexity increased.

Keywords

approximation theory; channel estimation; digital video broadcasting; filtering theory; frequency division multiple access; frequency-domain analysis; matrix algebra; radio receivers; DVB-H receiver; OFDM system; ZF equalizer; doubly selective channel; frequency-domain channel gain matrix; multipath channel; orthogonal frequency-division multiplexing; parallel-filtering based equalization; piecewise channel approximation; zero-forcing equalizer; Approximation methods; Channel estimation; Complexity theory; Digital video broadcasting; Equalizers; OFDM; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE

Conference_Location

Miami, FL

ISSN

1930-529X

Print_ISBN

978-1-4244-5636-9

Electronic_ISBN

1930-529X

Type

conf

DOI

10.1109/GLOCOM.2010.5683698

Filename

5683698