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Local oscillator phase lock under multipath for video deghoster systems

Sherratt, R. S. (1997) Local oscillator phase lock under multipath for video deghoster systems. In: Signal Processing Systems, 1997. SIPS 97 - Design and Implementation., 1997 IEEE Workshop on , 03-05 Nov 1997, Leicester, UK, pp. 311-319.

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To link to this article DOI: 10.1109/SIPS.1997.626250

Abstract/Summary

Under multipath conditions, standard Video Intermediate Frequency (VIF) detectors generate a local oscillator phase error and consequently produce a dispersed non-ideal detected video signal due to the presence of additional IF carriers. The dispersed video causes problems when attempting to identify and remove the multipath interference, or ghosts, by the use of Digital Signal Processing and digital filtering. A digital phase lock system is presented which derives the correct phase for synchronous detection in the presence of multipath by using correlation information that has already been calculated as part of the deghosting process. As a result, the video deghoster system is made simpler, faster and more economical.

Item Type:Conference or Workshop Item (Paper)
Refereed:Yes
Divisions:Faculty of Science > School of Systems Engineering
ID Code:19098
Uncontrolled Keywords:digital filtering, digital phase lock system, dispersed video, local oscillator phase error, local oscillator phase lock, multipath, multipath conditions, video deghoster systems, video intermediate frequency detectors, video signal

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