APPARATUS AND METHOD FOR MEASURING SINR USING PREAMBLE IN MOBILE COMMUNICATION SYSTEM

摘要

An apparatus and a method for measuring an SINR(Signal-to-Interference and Noise Ratio) by using a preamble in a mobile communication system are provided to enable more precise estimation for the SINR although selective frequency fading is too much, by using the fact that density of the preamble is higher than a pilot. An SINR estimator calculates the average noise power by using the CP(Cyclic Prefix) of a received signal. On the assumption that an identical frequency domain channel exists between neighbor sub-carriers of an identical segment, the SINR estimator calculates the signal power of a serving segment(601), calculates average power of the serving segment, and then calculates interference power of the serving segment by using the difference between the sum of the average noise power and the signal power of the serving segment and the calculated average power. The SINR estimator calculates the average power of each interference segment, and obtains the interference power of each interference segment, based on the difference between the average noise power and the calculated average power(603). The SINR estimator divides the signal power of the serving segment by the sum of the average noise power and the total interference power and obtains the SINR of the received signal(605).