Title: DSP-based variable aperture code generation technique
Application Number: 03804330 Application Date: 2003.02.14
Publication Number: 1636368 Publication Date: 2005.07.06
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04L27/02;H04L27/04;H03D1/24;H03C1/60
Applicant(s) Name: Thomson Licensing SA Address:
Inventor(s) Name: Zoltowski Michael David;Tomezak Gregory John;Krogm
Attorney & Agent: cheng tianzheng wang yong
Abstract:
    Variable Aperture Coded (VAC) signals for VAC modulation are advantageously generated by a digital signal processor (12) that yields a VAC signal having a single narrow in the positive frequency region. A Discrete-Time Hilbert transformer (12) isolates the only the positive spectral peaks, thus yielding a VAC signal that affords greater control over zero crossings.
Time: 13