Improved Viterbi decoder metrics for two-stage detectors in DS-CDMA.

Modified branch metrics are proposed for single-user Viterbi decoders in two-stage detectors for convolutionally-encoded code-division multiple-access (CDMA) systems with random spreading sequences. The modifications are based on modeling the residual multiple-access interference (RMAI) after subtra...

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Bibliographic Details

Published in:	IEEE Transactions on wireless communications 3, 5 (2004).
Main Author:	Elezabi, A.
Format:	Article
Language:	English
Subjects:	DS-CDMA. Euclidean branch metric. Viterbi decoder metrics. Convolutional code. Direct sequence code division multiple access. Random spreading sequences. Residual multiple-access interference. Subtractive interference cancellation. Time-dependent variance. Two-stage detectors.