Nec Corporation

Vasic Dobrica

Filip Zalio

Holly He

Mikhail Shnaider

A method of cancelling interference induced by a coherent interference source in a spread spectrum receiver comprising the steps of: quantifying () first interference values induced by the coherent interference source (SCH) in symbols on a first spread spectrum physical channel (P-CCPCH; CPICH); calculating () second interference values induced by the coherent interference source in symbols on a second spread spectrum channel (DPCH) from the first interference values; and applying () a correction value, derived from the second interference values, to the symbols on the second spread spectrum channel.

Interference cancellation in a spread spectrum receiver

A method of cell search in a wireless communication systems having a plurality of base stations and a mobile station, each of the plurality of base stations serving a separate cell within a service area and transmitting a common primary synchronization code (PSC) in a primary synchronization channel within a slot of a radio frame, the method including the steps of: (a) scanning () through radio channels in scanning increments corresponding to a standard channel raster; (b) estimating () the PSC signal-to-noise ratio of each radio channel; (c) if a PSC signal-to-noise ratio is above a first predetermined threshold level (), completing a cell search procedure including slot synchronization, frame synchronization and scrambling code detection steps for that radio channel; (d) if the cell search procedure is successfully completed () for the radio channel in step (c), increasing the scanning increments to the broadcast frequency separation between cells; (e) when all radio channels are scanned in step (d), sorting () the scanned radio channels in descending order by PSC signal-to-noise ratio; and (f) performing () the cell search procedure on each sorted radio channel in descending order.

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Victoria, Australia

Vasic Dobrica