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On the Design of Reduced State Demodulators with Interference Cancellation for Iterative Receivers

Hu, Sha LU and Rusek, Fredrik LU (2015) IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, 2015 In Personal, Indoor, and Mobile Radio Communications (PIMRC), 2015 IEEE 26th Annual International Symposium on p.981-985
Abstract
We consider the problem of designing demodulators for channels with memory that use reduced-size trellis descriptions for the received signal. We assume an overall iterative receiver, and for the parts of the signal not covered by the trellis description, we use interference cancellation based on the soft information provided by the outer decoder. In order to reach a trellis description, a linear filter is applied as front-end to compress the signal structure into a small trellis. This process requires three parameters to be designed: (i) the front-end filter, (ii) the feedback filter through which the interference cancellation is done, and (iii) a target response which specifies the trellis. While (i) and (ii) can be found in closed form,... (More)
We consider the problem of designing demodulators for channels with memory that use reduced-size trellis descriptions for the received signal. We assume an overall iterative receiver, and for the parts of the signal not covered by the trellis description, we use interference cancellation based on the soft information provided by the outer decoder. In order to reach a trellis description, a linear filter is applied as front-end to compress the signal structure into a small trellis. This process requires three parameters to be designed: (i) the front-end filter, (ii) the feedback filter through which the interference cancellation is done, and (iii) a target response which specifies the trellis. While (i) and (ii) can be found in closed form, a numerical search is required for (iii). The numerical search is, however, very efficient and stable. Demodulators of this form have been studied before under the name channel shortening (CS), but the interplay between CS and interference cancellation has not been adequately addressed in the literature. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Personal, Indoor, and Mobile Radio Communications (PIMRC), 2015 IEEE 26th Annual International Symposium on
pages
5 pages
conference name
IEEE Annual International Symposium on Personal, Indoor and Mobile Radio Communications, 2015
external identifiers
  • Scopus:84958044523
DOI
10.1109/PIMRC.2015.7343440
language
English
LU publication?
yes
id
7b5c1a1f-79d4-4555-851a-100f5a3f2b0d (old id 7448311)
date added to LUP
2015-07-20 10:34:42
date last changed
2016-10-13 05:12:12
@misc{7b5c1a1f-79d4-4555-851a-100f5a3f2b0d,
  abstract     = {We consider the problem of designing demodulators for channels with memory that use reduced-size trellis descriptions for the received signal. We assume an overall iterative receiver, and for the parts of the signal not covered by the trellis description, we use interference cancellation based on the soft information provided by the outer decoder. In order to reach a trellis description, a linear filter is applied as front-end to compress the signal structure into a small trellis. This process requires three parameters to be designed: (i) the front-end filter, (ii) the feedback filter through which the interference cancellation is done, and (iii) a target response which specifies the trellis. While (i) and (ii) can be found in closed form, a numerical search is required for (iii). The numerical search is, however, very efficient and stable. Demodulators of this form have been studied before under the name channel shortening (CS), but the interplay between CS and interference cancellation has not been adequately addressed in the literature.},
  author       = {Hu, Sha and Rusek, Fredrik},
  language     = {eng},
  pages        = {981--985},
  series       = {Personal, Indoor, and Mobile Radio Communications (PIMRC), 2015 IEEE 26th Annual International Symposium on},
  title        = {On the Design of Reduced State Demodulators with Interference Cancellation for Iterative Receivers},
  url          = {http://dx.doi.org/10.1109/PIMRC.2015.7343440},
  year         = {2015},
}