H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/707 (2006.01)
Patent
CA 2355837
A novel and improved method and apparatus for coherent demodulation in the presence of phase discontinuities is described. The pilot signal is prepared for optimal coherent demodulation by the use of two filters: one capable of withstanding the effects of phase discontinuity; a second providing superior filtering performance than the first so long as phase discontinuities are not present. Both filters are simultaneously operated. In the exemplary embodiment of the present invention, a sliding window filter (410) is employed for the superior performing filter absent phase discontinuity and a block filter (440) is employed for use when phase discontinuities are present.
L'invention concerne un nouveau procédé et un nouvel appareil améliorés permettant d'obtenir une démodulation cohérente en présence de discontinuités de phase. Le signal pilote est préparer pour obtenir une démodulation cohérente optimale à l'aide de deux filtres: un premier filtre capable de résister aux effets de discontinuité de phase; un second filtre fournissant un rendement de filtrage supérieur substrat rendement du premier filtre en l'absence de discontinuité de phase ne survient. Les deux filtres sont mis en marche simultanément. Dans le mode de réalisation exemplaire, un filtre à fenêtre coulissante (410) est utilisé en cas d'absence de discontinuité de phase dans le filtre à rendement supérieur et un filtre bloc (440) est utilisé en cas de présence de discontinuités de phase.
Agrawal Avneesh
Bender Paul E.
Blessent Luca
Butler Brian K.
Motiwala Quaeed
Qualcomm Incorporated
Smart & Biggar
LandOfFree
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