Iterative Equalization with Soft Feedback with a Subsequent Stage Utilizing Hopfield Networks for Error Search and Correction

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Details zur Publikation

Autorinnen und Autoren: Rößler J, Gerstacker W, Huber J
Titel Sammelwerk: ITG-Fachbericht
Verlag: VDE-Verlag
Jahr der Veröffentlichung: 2004
Tagungsband: Conference Proceedings
Seitenbereich: 87-94
ISSN: 0932-6022


Abstract

In this paper, a second stage for algorithms applying iterative soft decision interference cancellation (ISDIC), for channel equalization is proposed performing error search and correction. Analysis by simulations shows that a matched filter (MF) ISDIC with subsequent second stage can outperform a more complex minimum mean-squared error (MMSE) ISDIC. Furthermore, the latter can be improved by the proposed second stage by up to 2 dB. It is shown that the ISDIC scheme with following second stage can reach the matched filter bound up to a fraction of a dB for all analyzed channels and 4QAM transmission and up to 1 dB for 16QAM transmission. In [1] it has been reported that the MF ISDIC performs very well for highly dispersive channels, e.g. with 60 symbol-spaced paths, but for channels of moderate dispersion an error floor occurs. Utilizing performance bounds for delayed decision-feedback sequence estimation (DDFSE) we show that now already for channels of moderate length, e.g. 20 symbol-spaced taps, even the low-complexity MF ISDIC with the proposed subsequent second stage outperforms a DDFSE approach with about 109 states.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Gerstacker, Wolfgang Prof. Dr.
Lehrstuhl für Digitale Übertragung
Huber, Johannes Prof. Dr.-Ing.
Lehrstuhl für Informationsübertragung


Zitierweisen

APA:
Rößler, J., Gerstacker, W., & Huber, J. (2004). Iterative Equalization with Soft Feedback with a Subsequent Stage Utilizing Hopfield Networks for Error Search and Correction. In Conference Proceedings (pp. 87-94). Erlangen, Germany, DE: VDE-Verlag.

MLA:
Rößler, Jürgen, Wolfgang Gerstacker, and Johannes Huber. "Iterative Equalization with Soft Feedback with a Subsequent Stage Utilizing Hopfield Networks for Error Search and Correction." Proceedings of the 5th ITG Conference on Source and Channel Coding, Erlangen, Germany VDE-Verlag, 2004. 87-94.

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