Robust decision feedback equalizer scheme by using sphere-decoding detector

Author

Hung-Yi Cheng ; Chun-Yuan Chu ; Yen-Liang Cheng ; Wu, An-Yeu Andy

Author_Institution

Grad. Inst. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2014

fDate

4-9 May 2014

Firstpage

5041

Lastpage

5044

Abstract

The decision feedback equalizer (DFE) is an efficient scheme to suppress intersymbol interference (ISI) in various communication and magnetic recording systems. However, most DFE implementations suffer from the phenomenon of error propagation, which degrades its bit error rate (BER) performance. In this paper, We use sphere detector (SD) to achieve maximum likelihood (ML) detection and significantly reduce the system symbol error rate (SER). Simulations show that the proposed scheme with sphere detector decision feedback equalizer (SD-DFE) algorithm can efficiently reduce the SER. At SNR=28, the SER can be improved from 2.0 × 10^-5 (Ideal DFE) to 1.8 × 10^-6 (six-stage SD-DFE).

Keywords

equalisers; error statistics; intersymbol interference; magnetic recording; maximum likelihood estimation; BER performance; DFE; ISI; ML detection; SD; SER; bit error rate; communication systems; error propagation; intersymbol interference; magnetic recording systems; maximum likelihood detection; robust decision feedback equalizer scheme; sphere decoding detector; symbol error rate; Decision feedback equalizers; Detectors; Joints; Modulation; Reliability; Signal to noise ratio; Vectors; decision feedback equalizer (DFE); error propagation; sphere detector;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing (ICASSP), 2014 IEEE International Conference on

Conference_Location

Florence

Type

conf

DOI

10.1109/ICASSP.2014.6854562

Filename

6854562