Title:
A SIMPLIFIED DIGITAL FIR FILTER FOR DIRECT SEQUENCE SPREAD SPECTRUM COMMUNICATION SYSTEMS
Document Type and Number:
WIPO Patent Application WO2001026224
Kind Code:
A9
Abstract:
A spread spectrum modulated signal generator is disclosed that reduces the storage requirement for storing values representing filter responses of input signal samples in a digital filter by taking advantage of time-reversal symmetry of the responses. Moreover, the disclosed signal generator supports up-ramping and down-ramping for smooth transmission of spread spectrum modulated signals.
More Like This:
JPH02264509 | DIGITAL FILTER |
JP3049624 | WAVEFORM FORMING FILTER AND WAVEFORM FORMING HIGH-PASS FILTER |
JPH0741213 | [Name of invention] FIR filter |
Inventors:
DENT PAUL W
BARROW DAVID
BARROW DAVID
Application Number:
PCT/US2000/025970
Publication Date:
January 23, 2003
Filing Date:
September 22, 2000
Export Citation:
Assignee:
ERICSSON INC (US)
International Classes:
H03H17/06; H04L27/00; (IPC1-7): H03H17/06
Download PDF: