An Improved Fixed Sphere Decoder Employing Soft Decision for the Detection of Non-orthogonal Signals

Author

Tongyang Xu ; Grammenos, Ryan C. ; Marvasti, Farokh ; Darwazeh, Izzat

Author_Institution

Dept. of Electron. & Electr. Eng., Univ. Coll. London, London, UK

Volume

17

Issue

10

fYear

2013

fDate

Oct-13

Firstpage

1964

Lastpage

1967

Abstract

This letter proposes a hybrid soft iterative method together with Fixed Sphere Decoding (FSD) concurrently optimize performance and complexity. We show that for bandwidth compression factors of up to 25 percent, we can achieve the same performance as Orthogonal Frequency Division Multiplexing (OFDM). For systems with bandwidth compression higher than 25 percent, the complexity/performance trade-offs of the hybrid method are better than those of Truncated Singular Value Decomposition-FSD (TSVD-FSD).

Keywords

OFDM modulation; decoding; iterative methods; signal detection; FSD; OFDM; bandwidth compression factors; fixed sphere decoding; hybrid soft iterative method; nonorthogonal signal detection; orthogonal frequency division multiplexing; soft decision; Bandwidth; Complexity theory; Detectors; Equations; Mathematical model; OFDM; Vectors; Multicarrier communications; OFDM; SEFDM; fixed sphere decoder; iterative detection; soft decision; spectral efficiency;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2013.090213.131573

Filename

6589294