Extraction of Soft Bit Information with the Use of M-ary Modulation

Authors: M. Benthin, K.-D. Kammeyer
Abstract: In this paper, the generation and the use of reliability information for the decoding process of convolutionally encoded data in the context of a CDMA-environment is addressed. Special emphasis lies on the noncoherent detection of M-ary orthogonal symbols with a RAKE-receiver. Although symbol by symbol decisions are carried out, it is possible to characterize the reliability of the individual bits with specific soft information. This can be exploited successfully by a Viterbi decoder. A significant improvement of the bit error performance is achieved, even on low signal to noise conditions.
Document type: Conference Paper
Publication: Darmstadt, Germany, 1. September 1994
Conference: COST 231, TD(94)108
Pages: 1-8
Index: 36
COST_1994_benthin.ps.gz59 KB
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