Optimal Sequences for a Quasi-Synchronous Multi-rate VPG DS/CDMA System
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In this paper, the analytical framework and the optimal sequence selection criterion for a quasi-synchronous (QS) multi-rate VPG DS/CDMA system are presented. From the numerical results, it is shown that the conventional QS sequences for a single-rate CDMA system are not suitable for a multi-rate VPG DS/CDMA system purpose, and furthermore, several sequence sets are examined for multi-rate VPG DS/CDMA system. Finally, we show the most preferable sequence set is MIN-QS-AMIP Hadamard sequence set although it has the imperfect QS property.
Abstract
In this paper, the analytical framework and the optimal sequence selection criterion for a quasi-synchronous (QS) multi-rate VPG DS/CDMA system are presented. From the numerical results, it is shown that the conventional QS sequences for a single-rate CDMA system are not suitable for a multi-rate VPG DS/CDMA system purpose, and furthermore, several sequence sets are examined for multi-rate VPG DS/CDMA system. Finally, we show the most preferable sequence set is MIN-QS-AMIP Hadamard sequence set although it has the imperfect QS property.