Wireless transmitting apparatus, wireless receiving...

H - Electricity – 04 – L

Patent

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Details

H04L 27/22 (2006.01)

Patent

CA 2620036

A wireless transmitting apparatus inserts a training signal into a transmission burst at fixed symbol intervals as a pilot signal, a wireless receiving apparatus performs AD conversion of a received burst signal, performs symbol timing recovery, performs frame position detection and pilot signal extraction from the received burst signal for which symbol timing was established, performs frame synchronization, and performs a carrier frequency estimation using pilot signal. A carrier frequency estimation is also performed with respect to a received burst signal for which frame synchronization was established, and channel distortion is estimated and output based on a frequency-corrected received burst signal. Channel distortion estimation is then performed with respect to a frequency-corrected received burst signal, and a data symbol sequence of the channel-compensated received burst signal is converted to a received data bit stream.

L'appareil d'émission radio insère un signal de training, en tant que signal pilote, dans une salve de transport selon des intervalles donnés de symbole. L'appareil de réception radio soumet le signal de salve reçu à une conversion A/N puis à une synchronisation de timing de symbole. Après établissement du timing de symbole, l'appareil de réception radio détecte une position de trame dans le signal de salve reçu, en extrait le signal pilote, effectue une synchronisation de trame et utilise les informations de signal pilote pour estimer une fréquence de porteuse. Après établissement de la synchronisation de trame, l'appareil de réception radio réalise une correction de fréquence de porteuse pour le signal de salve reçu et estime, en fonction du signal de salve reçu à fréquence corrigée, une distorsion de chemin de propagation et la fournit. Alors, l'appareil de réception radio réalise une correction de distorsion de chemin de propagation pour le signal de salve reçu à fréquence corrigée et convertit la séquence de symbole d'information du signal de salve reçu à chemin de propagation corrigé en une séquence de bits de données reçus.

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