H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 5/02 (2006.01) H04J 1/05 (2006.01) H04J 4/00 (2006.01) H04L 5/06 (2006.01)
Patent
CA 2334668
The present invention relates generally to the problem of filtering, decimation or interpolation and frequency conversion in the digital domain, and more particularly to its use in wideband multichannel receiver, channelisation, and transmitter, de-channelisation, structures. The invention combines a stand-alone fast convolution algorithm which is further modified and then combined with additional signal processing. By intelligently splitting the filtering effort between the modified fast convolution algorithm block and an additional signal processing block a synergy is created between the two blocks which provides for decreased costs, reduced delay and a reduction in the size of the Fast Fourier Transforms. The resulting advantages are especially useful in any system handling multiple channels simultaneously, but especially where there exist strict requirements on both delay and on input Fast Fourier Transform size.
L'invention concerne le problème de filtrage, de décimation ou d'interpolation et de conversion de fréquence dans le domaine numérique et, plus particulièrement, l'utilisation du canaliseur et décanaliseur numérique dans des structures de canalisation, récepteur multicanal large bande, et des structures de décanalisation, émetteur multicanal large bande. L'invention associe un algorithme de convolution rapide autonome qui est davantage modifié puis associé au traitement de signaux additionnels. Par une division intelligente de l'efficacité de filtrage entre le bloc-algorithme de convolution rapide modifié et un bloc-traitement de signaux additionnels, on créée une synergie entre les deux blocs, ce qui permet de réduire les coûts, les délais et la taille des TFR. Ces avantages sont particulièrement utiles dans n'importe quel système gérant simultanément de multiples canaux, mais plus particulièrement là où il y a de sévères exigences tant en termes de délai que de taille d'entrée de TFR.
Marks & Clerk
Telefonaktiebolaget L. M. Ericsson (publ)
Telefonaktiebolaget Lm Ericsson
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