H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 7/00 (2006.01) H03D 1/00 (2006.01) H04L 7/04 (2006.01) H04L 27/06 (2006.01)
Patent
CA 2575317
Techniques for generating preamble sequences for OFDM and OFDMA communication systems based on CAZAC sequences (120) with desired properties of constant amplitudes (CA) and zero autocorrelation (ZAC). Such preamble sequences may be used for synchronization and identification of individual transmitters. For example the OFDMA symbol is constructed using a CAZAC sequence in the frequency-domain (160) and the resulting time-domain waveform is a near-CAZAC sequence (170).
L'invention concerne des techniques pour générer des séquences de préambule pour des systèmes de communication OFDM et OFDMA sur la base de séquences CAZAC à propriétés recherchées d'amplitudes constantes (CA) et d'autocorrélation nulle (ZAC). De telles séquences de préambule peuvent servir à la synchronisation et à l'identification de transmetteurs individuels. Par exemple, le symbole OFDMA est établi au moyen d'une séquence CAZAC dans le domaine fréquentiel et la forme d'onde du domaine temporel en résultant est une séquence proche de CAZAC.
Cai Sean
Fang Yonggang
Feng Dazi
Hou Jason
Wang Jing
Smart & Biggar
Zte San Diego Inc.
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