A new method to design CDMA spreading sequences

It is well-known that multi-value CDMA spreading codes can be designed by means of a pair of mirror multi-rate filter banks based on some optimizing criterion. This paper indicates that there exists a theoretical bound in the performance of its circulate correlation property, which is given by an ex...

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Bibliographische Detailangaben
Hauptverfasser:	Bi Jianxin, Wang Yingmin, Tian Hongxin, Yi Kechu
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Computer simulation Design methodology Design optimization Entropy Filter bank Filtering theory Frequency domain analysis Gold Mirrors Multiaccess communication
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Beschreibung
Zusammenfassung:	It is well-known that multi-value CDMA spreading codes can be designed by means of a pair of mirror multi-rate filter banks based on some optimizing criterion. This paper indicates that there exists a theoretical bound in the performance of its circulate correlation property, which is given by an explicit expression. Based on this analysis, a criterion of maximizing entropy is proposed to design such codes. A computer simulation result suggests that the resulting codes outperform the conventional binary balance Gold codes for an asynchronous CDMA system.
DOI:	10.1109/ICCT.2000.889259