Applications of Per-Survivor Processing (PSP) to adaptive Maximum Likelihood Sequence Estimation (MLSE) and Reduced State Sequence Estimation (RSSE) are investigated in time-varying frequency-selective Rayleigh fading channels, which are typical of digital mobile communication systems. It is shown that the PSP characteristic of providing the channel estimators to the individual survivors with zero-delay, high-quality data-aiding sequences proves essential in a rapidly time-varying environment. We consider a Time-Division Multiple Access (TDMA) data frame where each user transmits a block of information symbols preceded by a known preamble and followed by a known tail. PSP-based adaptive RSSE decoders are shown to outperform conventional adaptive RSSE decoders of equivalent state complexity based on tentative decisions, when a rapidly varying channel is assumed. In addition, previous results on the need for an adaptive receiver in mobile applications are confirmed and the effect of not using a few known tail symbols is assessed.

Applications of per-survivor processing to mobile digital communications / C. K., Tzou; Raheli, Riccardo; A., Polydoros. - (1993), pp. 77-81. ((Intervento presentato al convegno IEEE Globecom Commun. Theory Mini-Conf. (CTMC '93) tenutosi a Houston, Texas, U.S.A. nel November 1993 [10.1109/GLOCOM.1993.318432].

Applications of per-survivor processing to mobile digital communications

RAHELI, Riccardo;
1993

Abstract

Applications of Per-Survivor Processing (PSP) to adaptive Maximum Likelihood Sequence Estimation (MLSE) and Reduced State Sequence Estimation (RSSE) are investigated in time-varying frequency-selective Rayleigh fading channels, which are typical of digital mobile communication systems. It is shown that the PSP characteristic of providing the channel estimators to the individual survivors with zero-delay, high-quality data-aiding sequences proves essential in a rapidly time-varying environment. We consider a Time-Division Multiple Access (TDMA) data frame where each user transmits a block of information symbols preceded by a known preamble and followed by a known tail. PSP-based adaptive RSSE decoders are shown to outperform conventional adaptive RSSE decoders of equivalent state complexity based on tentative decisions, when a rapidly varying channel is assumed. In addition, previous results on the need for an adaptive receiver in mobile applications are confirmed and the effect of not using a few known tail symbols is assessed.
0780309170
Applications of per-survivor processing to mobile digital communications / C. K., Tzou; Raheli, Riccardo; A., Polydoros. - (1993), pp. 77-81. ((Intervento presentato al convegno IEEE Globecom Commun. Theory Mini-Conf. (CTMC '93) tenutosi a Houston, Texas, U.S.A. nel November 1993 [10.1109/GLOCOM.1993.318432].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2441022
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