Apparatus and method for estimating doppler spread in mobile communication system

摘要

An apparatus and a method for estimating a Doppler frequency in a mobile communication system are provided. The apparatus includes an estimator for temporarily estimating a maximum Doppler frequency based on channel values sampled according to a first period in a frame, a detector for calculating at least one correlation value between at least one channel value additionally sampled in the frame and at least one channel value sampled over the first period, and for determining whether aliasing occurs based on the correlation value, and a determiner for determining a final maximum Doppler frequency according to the occurrence or non-occurrence of the aliasing.

主权项

1. An apparatus for estimating a Doppler frequency in a mobile communication system, the apparatus comprising:
a receiver configured to receive at least one signal for estimating channel values sampled at a first position of each of subframes, wherein the receiver is further configured to:
determine a correlation value between a first channel value sampled at the first position in a subframe among the subframes and a second channel value additionally sampled at a second position in the subframe,determine whether aliasing occurs based on the correlation value, and, determine a maximum Doppler frequency based on whether the aliasing occurs, wherein the first position comprises a symbol at a start of a subframe, and wherein the second position comprises a symbol at a middle of the subframe.