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专利名称：Timing estimation in mobile communication
systems using parabolic interpolator
发明人：Ricke W. Clark,Jaleh Komaili申请号：US091630申请日：19980930公开号：US06219345B1公开日：20010417
专利附图：
摘要：The present invention discloses an improved system and method for increasingthe timing accuracy of a time domain multiple access (TDMA) mobile communicationsystem using a resource efficient parabolic interpolator. With the present invention, amobile unit receives burst transmissions from a base station and a timing information isrecovered therefrom. Since the timing information establishes the time of arrival of theburst, correlation initially identifies a coarse approximation of the location of the controlsignal within a defined portion of the burst signal and, together with two adjacentsamples. Using a curve fitting technique, a precise position of the peak, relative to thecoarse position, is determined. The equation can be solved ahead of time and values fromthe three samples substituted into a single expression for evaluation. Once the
coefficients of the equation are known, the time offset of a refined peak relative to thecoarse peak is readily calculated. The refined peak is then used in synchronizingtransmission between a mobile unit and the base station.
申请人：CONEXANT SYSTEMS, INC.
代理机构：Howrey Simon Arnold & White, LLP
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