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Noncoherent decoder-assisted frame synchronization for packet transmission.
- Source :
- IEEE Transactions on Wireless Communications; May2006, Vol. 5 Issue 5, p961-966, 6p
- Publication Year :
- 2006
-
Abstract
- We propose a noncoherent decoder-assisted (NDA) frame synchronizer, a two-stage, synchronization scheme based on the list-synchronization principle [P. Robertson, 1992], [M. Howlader and B. Woerner, 2001], for serially concatenated coded differential modulation (SCCD) system [K. R. Narayanan and G. L. Stuber, 1999] in packet transmission. For the first stage, we derive a suitable noncoherent maximum likelihood (SNML) rule, more effective for the noncoherent decoder's operating region of smaller channel phase offsets, to provide a reliable list of potential frame starting positions. For the second stage, we propose a hybrid sync method by exploiting the combined sign difference ratio (SDR) and sync word log-likelihood ratio (SW LLR) information [M. Howlader and B. Woerner, 2001] to obtain more reliable final decisions and reduce computational complexity. Performance and complexity of the proposed scheme are evaluated under constant and time-varying phase offsets in the AWGN channel via Monte Carlo simulation. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 15361276
- Volume :
- 5
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Wireless Communications
- Publication Type :
- Academic Journal
- Accession number :
- 52150682
- Full Text :
- https://doi.org/10.1109/TWC.2006.1633346