Frequency domain pn sequence

H - Electricity – 04 – L

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H04L 5/00 (2006.01) H04J 11/00 (2006.01) H04L 27/26 (2006.01)

Patent

CA 2734260

Systems and methodologies that enable implementing a complete period of frequency domain pseudo random/pseudo noise (PN) sequences, wherein the PN sequences satisfy predetermined requirements or relations. Such requirements or relations include: (1) supplying substantially low time domain Peak-to-Average Ratio (PAR); (2) supplying perfect periodic autocorrelation (zero out-of--phase correlation); (3) supplying substantially perfect cross correlation for any pair of sequences; and (4) supplying sequence correlation in the frequency domain by performing additive operations only or addition and subtraction-only. Taken together, such features in a family of sequences facilitate efficient signal transmission (e.g., substantially low power usage).

L'invention concerne des systèmes et des méthodologies qui permettent la mise en uvre d'une période complète de séquences de pseudo-aléas/pseudo-bruit (PN) du domaine de fréquence, les séquences PN satisfaisant à des exigences ou des relations prédéterminées. Ces exigences ou ces relations comprennent : (1) la fourniture d'un rapport entre valeur de crête et valeur moyenne de puissance (PAR) du domaine temporel pratiquement faible; (2) la fourniture d'une auto-corrélation périodique parfaite (absence de corrélation déphasée); (3) la fourniture d'une corrélation croisée pratiquement parfaite pour une paire quelconque de séquences; et (4) la fourniture d'une corrélation de séquences dans le domaine de fréquence par la réalisation d'opérations additives seulement ou d'addition et de soustraction seulement. Prises ensemble, ces fonctionnalités dans une famille de séquences facilitent la transmission efficace de signaux (par exemple, utilisation de puissance pratiquement faible).

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