APPARATUS FOR ESTIMATING CARRIER TO INTERFERENCE NOISE RATIO IN MOBILE COMMUNICATION SYSTEM

摘要

An apparatus for estimating a carrier to interference noise ratio(CINR) in a mobile communication system is provided to estimate the CINR accurately, by estimating noise power of a signal by using similarity of the channel characteristics of each adjacent sub carrier in sub carriers of a receiving signal. In an apparatus for estimating a carrier to interference noise ratio(CINR) in a mobile communication system, a first calculation part generates an ith calculation value T(i) by calculating a difference between a (i+1)th pilot sub carrier and an ith pilot sub carrier. A memory stores the ith calculation value T(i) and a (i-1)th calculation value T(i-1). A second calculation part(606) selects one of the ith calculation value T(i) and zero according to the value i, and selects one of the (i-1)th calculation value T(i-1) and zero, and outputs a different of two selected values to a third calculation part(609). The third calculation part squares the output value from the second calculation part, and multiplies the squared output value by 1/2 or 1/6 according to the value i, and outputs the multiplied value to a fourth calculation part. The fourth calculation part estimates noise by adding result values outputted from the third calculation part.