Channel quality estimation method and channel quality estimation apparatus

摘要

A method and apparatus is disclosed by which, in communication wherein a pilot channel for a pilot signal and an estimation object channel have different bandwidths, the channel quality of the estimation object channel can be estimated accurately based on the pilot signal. A despreading section (102) separates data of the object channel and the pilot signal of the pilot channel. A channel estimation section (103) determines a channel estimation value based on the pilot signal. A pilot channel quality estimation section (106) produces signal and noise levels of the pilot channel based on the channel estimation value and the pilot signal. A low frequency noise component estimation section (108) produces a low frequency component of pilot signal noise. A data channel quality conversion section (107) determines the data channel quality based on the outputs of the pilot channel quality estimation section and the low frequency noise component estimation section.