H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 27/00 (2006.01) H04J 11/00 (2006.01) H04L 27/26 (2006.01) H04L 1/00 (2006.01)
Patent
CA 2202752
In OFDM transmission use of an FFT is made for demodulating all carriers simultaneously. In order to prevent adverse influence of intersymbol interference due to multi path propagation, it is known to determine the impulse response of the transmission medium and to adapt the FFT window accordingly. According to the invention the centre of gravity of the impulse response is used rather than the first significant value of the impulse response. This has the advantage that the influence of deep fading has less influence on the selection of the FFT window, resulting in an improved performance.
En transmission par multiplexe fréquentiel orthogonal (OFDM), on utilise une transformation de Fourier rapide (FFT) pour démoduler simultanément toutes les porteuses. Afin d'éviter les effets néfastes des interférences intersymboles en raison de la propagation par trajets multiples, il est habituel de déterminer la réponse impulsionnelle du support de transmission et d'adapter en conséquence la fenêtre FFT. L'invention consiste à utiliser le centre de gravité de la réponse impulsionnelle plutôt que la première valeur significative de la réponse en question, ce qui offre l'avantage de réduire l'influence des évanouissements profonds sur le choix de la fenêtre FFT et d'améliorer ainsi les performances.
Fetherstonhaugh & Co.
Philips Electronics N.v.
LandOfFree
Transmission system with improved symbol processing does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmission system with improved symbol processing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmission system with improved symbol processing will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1868839