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Reduced-Complexity Receivers for Strongly Narrowband Intersymbol Interference Introduced by Faster-than-Nyquist Signaling

Prlja, Adnan LU and Anderson, John B LU (2012) In IEEE Transactions on Communications 60(9). p.2591-2601
Abstract
We propose new M-algorithm BCJR (M-BCJR) algorithms for low-complexity turbo equalization and apply them to severe intersymbol interference (ISI) introduced by faster than Nyquist signaling. These reduced-search detectors are evaluated in simple detection over the ISI channel and in iterative decoding of coded FTN transmissions. In the second case, accurate log likelihood ratios are essential and we introduce a 3-recursion M-BCJR that provides this. Focusing signal energy by a minimum phase conversion before the M-BCJR is also essential; we propose an improvement to this older idea. The new M-BCJRs are compared to reduced-trellis VA and BCJR benchmarks. The FTN signals carry 4-8 bits/Hz-s in a fixed spectrum, with severe ISI models as long... (More)
We propose new M-algorithm BCJR (M-BCJR) algorithms for low-complexity turbo equalization and apply them to severe intersymbol interference (ISI) introduced by faster than Nyquist signaling. These reduced-search detectors are evaluated in simple detection over the ISI channel and in iterative decoding of coded FTN transmissions. In the second case, accurate log likelihood ratios are essential and we introduce a 3-recursion M-BCJR that provides this. Focusing signal energy by a minimum phase conversion before the M-BCJR is also essential; we propose an improvement to this older idea. The new M-BCJRs are compared to reduced-trellis VA and BCJR benchmarks. The FTN signals carry 4-8 bits/Hz-s in a fixed spectrum, with severe ISI models as long as 32 taps. The combination of coded FTN and the reduced-complexity BCJR is an attractive narrowband coding method. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Faster-than-Nyquist, turbo equalization, minimum phase, intersymbol, interference, BCJR, reduced complexity
in
IEEE Transactions on Communications
volume
60
issue
9
pages
2591 - 2601
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • wos:000309204600024
  • scopus:84866734279
ISSN
0090-6778
DOI
10.1109/TCOMM.2012.070912.110296
language
English
LU publication?
yes
id
4c3134f5-1441-4aeb-81ee-8a5a990f1728 (old id 3184373)
date added to LUP
2012-12-06 14:33:02
date last changed
2017-11-05 04:01:43
@article{4c3134f5-1441-4aeb-81ee-8a5a990f1728,
  abstract     = {We propose new M-algorithm BCJR (M-BCJR) algorithms for low-complexity turbo equalization and apply them to severe intersymbol interference (ISI) introduced by faster than Nyquist signaling. These reduced-search detectors are evaluated in simple detection over the ISI channel and in iterative decoding of coded FTN transmissions. In the second case, accurate log likelihood ratios are essential and we introduce a 3-recursion M-BCJR that provides this. Focusing signal energy by a minimum phase conversion before the M-BCJR is also essential; we propose an improvement to this older idea. The new M-BCJRs are compared to reduced-trellis VA and BCJR benchmarks. The FTN signals carry 4-8 bits/Hz-s in a fixed spectrum, with severe ISI models as long as 32 taps. The combination of coded FTN and the reduced-complexity BCJR is an attractive narrowband coding method.},
  author       = {Prlja, Adnan and Anderson, John B},
  issn         = {0090-6778},
  keyword      = {Faster-than-Nyquist,turbo equalization,minimum phase,intersymbol,interference,BCJR,reduced complexity},
  language     = {eng},
  number       = {9},
  pages        = {2591--2601},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Communications},
  title        = {Reduced-Complexity Receivers for Strongly Narrowband Intersymbol Interference Introduced by Faster-than-Nyquist Signaling},
  url          = {http://dx.doi.org/10.1109/TCOMM.2012.070912.110296},
  volume       = {60},
  year         = {2012},
}