Device for digital processing with frequency filtering and reduced computation complexity

US6968352B1 · kind B1 · utility

Assignee

• FRANCE TELECOM · FR

Inventors

• Andre Gilloire · Lannion, FR
• Wolfgang Tager · Munich, DE
• Valérie Turbin · Saint-Brieuc, FR

Key dates

• Filing date: Aug 5, 1999
• Grant date: Nov 22, 2005
• Expiry date: Aug 5, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M9/082
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A device for processing digital data. A module (M2, M3) produces on a data vector of the frequency domain Z(k), wherein K varies from 0 to N−1, a convolution with a function U, convolution which corresponds to a cancellation in the time domain of the samples of the inverse transform of Z(k). The function U is in the form: U(k)=sin c(k−k0/2.e)−jπ(α(k−k0/2.P(k)), wherein K0 is a constant integer and P(k) a weighting window symmetrical about k0.