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Iterative channel estimation using soft decision feedback

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4 Author(s)
Sandell, M. ; Lucent Technol., AT&T Bell Labs., Swindon, UK ; Luschi, C. ; Strauch, P. ; Yan, R.

We present an iterative channel estimation scheme with soft decision feedback. In a block-by-block transmission system with a soft-output equalizer and/or decoder it is possible to feed back the decisions to the channel estimator to improve its performance. We propose to feed back soft decisions which will reduce error propagation. We also derive a suboptimal estimator with substantially lower complexity and present simulations for a GSM-like system. The improvement of the bit-error rate over non-iterative schemes with this low complexity estimator is about 0.8 dB (equalizer feedback) and 1.5 dB (decoder feedback)

Published in:
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE  (Volume:6 )

Date of Conference: 1998

Page(s):
3728 - 3733 vol.6
Meeting Date :
08 Nov 1998-12 Nov 1998
Print ISBN:
0-7803-4984-9
INSPEC Accession Number:
6439702
Conference Location :
Sydney,NSW
Digital Object Identifier :
10.1109/GLOCOM.1998.776006
Product Type:
Conference Publications

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