Performance Analysis of Hybrid Carrier System with MMSE Equalization over Doubly-Dispersive Channels

Author

Wang, Kun ; Sha, Xuejun ; Mei, Lin ; Qiu, Xin

Author_Institution

Harbin Inst. of Technol., Harbin, China

Volume

16

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1048

Lastpage

1051

Abstract

A hybrid carrier (HC) system employing a frequency domain linear equalization based on minimum mean square error (MMSE) criterion is analyzed in this letter. The analytical studies prove that HC modulation scheme achieves a trade-off between circularly prefixed orthogonal frequency division multiplexing (OFDM) and single-carrier (SC) systems in terms of resisting doubly-selective fading. By dispersing the aggregated residual interference effectively, the HC system with particular modulation orders outperform OFDM and SC systems within a specific signal noise ratio (SNR) interval. Both analysis and simulation results over a typical double selective fading channel verify the superiority of HC modulation in suppressing residual interferences.

Keywords

OFDM modulation; equalisers; fading channels; interference suppression; least mean squares methods; HC modulation scheme; MMSE criterion; MMSE equalization; SC systems; SNR interval; circularly OFDM systems; circularly prefixed orthogonal frequency division multiplexing systems; double selective fading channel; doubly-dispersive channels; frequency domain linear equalization; hybrid carrier system; minimum mean square error criterion; modulation orders; residual interference suppression; signal noise ratio interval; single-carrier systems; Bit error rate; Frequency domain analysis; Interference; Modulation; OFDM; Signal to noise ratio; Hybrid carrier (HC); doubly-selective fading; frequency domain linear equalization; minimum mean square error (MMSE);

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2012.050112.120414

Filename

6196152