Patent ID: 7634014
Filing Date: 2009-12-15
Classification: H04L

Abstract:
1. An apparatus for adaptively allocating pilots in a base station (BS) of a communication system, comprising: a data mapper for mapping, to a data burst interval of a downlink frame, data to be transmitted to at least one mobile station (MS); an adaptive pilot pattern generator for generating pilots according to a designated pilot pattern; a pilot inserter for inserting the pilots generated by the adaptive pilot pattern generator into an output of the data mapper; and a coordinator for controlling the data mapper and the adaptive pilot pattern generator according to information, received from the at least one MS, indicating a multipath delay between the BS and the at least one MS, relatively raising a distribution density of pilots of a signal to be transmitted to the at least one MS when the multipath delay is large, and relatively lowering the pilot distribution density when the multipath delay is small.