Patent ID: 8144822
Filing Date: 2012-03-27
Classification: H04B,H04W

Abstract:
1. A noise power estimation apparatus for MIMO scheme, comprising: a unit configured to obtain total noise powers, wherein each of the total noise powers is proportional to dispersion of a despread pilot signal for each of paths from which the pilot signal is received; a unit configured to subtract an amount that is obtained by dividing the total noise power of each path by a predetermined number of symbols from an average power of the despread pilot signal averaged for the predetermined number of symbols so as to obtain a received power of the pilot signal for each of the paths; and a unit configured to obtain a multipath interference component based on the received power of the pilot signal for each of the paths and a predetermined power ratio between the pilot signal and a data signal transmitted with the pilot signal, and to subtract the multipath interference component from the total noise power of each path so as to obtain a noise power for each of the paths.