Patent ID: 7050482
Filing Date: 2006-05-23
Classification: H04B,H04L

Abstract:
1. A communication quality measuring method in CDMA cellular system detecting a reception chip timing of a channel to be measured and measuring communication quality, comprising: time series generating step of generating two series of data consisted of a time series data of a detected value and a time series data delayed for one, two or more periods, with respect to said reception chip timing where the detected value becomes the same; matrix calculation step of deriving covariant matrix of said two series data generated in said time series generating step; first power calculating step of deriving a desired signal power and an interference signal power in said reception chip timing from a eigenvalue of said covariant matrix; and signal to interference power ratio (SIR) calculating step deriving a SIR at said reception chip timing from said desired signal power and said interference signal power.