Unique Word Based Frequency Domain Equalization with Noise Prediction

Author

Tran, Le-Nam ; Hong, Een-Kee

Author_Institution

Sch. of Electron. & Inf., Kyung Hee Univ., Yongin

Volume

12

Issue

10

fYear

2008

fDate

10/1/2008 12:00:00 AM

Firstpage

785

Lastpage

787

Abstract

Recently, the frequency domain equalization with time domain noise prediction (FDE-NP) has been proposed as an alternative to hybrid decision feedback equalization (HDFE). The current FDE-NP structures use the cyclic prefix (CP) extension (FDE-NP-CP). However, the unknown nature of CP degrades the performance of FDE-NP due to error propagation. This letter proposes a unique word (UW) based FDE-NP (FDE-NP-UW) that can yield better performance. Both optimal and suboptimal designs of the FDE-NP-UW are presented. We observe that the optimal FDE-NP-UW provides a performance gain of about 1.5 dB over the FDE-NP-CP, and about 0.5 dB over the suboptimal design at a BER of 10^-3.

Keywords

decision feedback equalisers; radiocommunication; time-domain analysis; cyclic prefix extension; error propagation; gain 0.5 dB; gain 1.5 dB; high data rate transmission; hybrid decision feedback equalization; optimal designs; suboptimal design; time domain noise prediction; unique word based frequency domain equalization; wireless environment; Bit error rate; Decision feedback equalizers; Degradation; Filters; Frequency domain analysis; Helium; Intersymbol interference; OFDM; Performance gain; Wireless sensor networks; Frequency domain equalization; decision feedback equalization; noise prediction; unique word;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

Conference_Location

10/1/2008 12:00:00 AM

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2008.080061

Filename

4640954