Patent ID: 8031797
Filing Date: 2011-10-04
Classification: H04B,H04L

Abstract:
1. An interference power estimating device, comprising: a reference symbol acquiring unit to acquire a reference symbol corresponding to a target pilot symbol by symbol-averaging a reference signal including one or more pilot symbols being allocated in positions near in terms of time to the target pilot symbol, assuming each of pilot symbols included in a received signal to be the target pilot, wherein a number of the one or more pilot symbols is less than a number of pilot symbols within one slot; an estimating unit to estimate interference power of the received signal by squaring each difference between the target pilot symbol and the reference symbol corresponding to the target pilot symbol acquired by the reference symbol acquiring unit; a channel estimating unit to calculate a channel estimation value used for synchronously detecting each of the pilot symbols included in the reference signal by symbol-averaging the pilot symbols within a slot to which to allocate each of the pilot symbols and the pilot symbol corresponding to the reference symbol acquired from the reference signal; and a speed estimating unit to estimate moving speed of a communication terminal in which the interference power estimating device is included; wherein the reference symbol acquiring unit switches over so that the number of the pilot symbols included in the reference signal becomes smaller as the moving speed estimated by the speed estimating unit becomes higher.