APPARATUS AND METHOD FOR ESTIMATING CARRIER TO INTERFERENCE AND NOISE RATIO IN COMMUNICATION SYSTEM

An apparatus and a method for estimating a CINR(Carrier to Interference and Noise Ratio) in a communication system are provided to reduce an error due to the difference between a measuring time of the CINR and a transmitting time of data by scheduling and estimating the CINR at the transmitting time of data when scheduling the data transmission in a transmitter. An apparatus for estimating a CINR in a communication system includes a CINR receiver(102), a CINR estimator(104), and a scheduler(106). The CINR receiver(102) receives the CINR from a receiver(150). The CINR estimator(104) estimates the CINR after a predetermined delay time by using the received CINR and the previously received CINR. The scheduler(106) determines the allocation of communicational resources by using the estimated CINR. The CINR estimator(104) includes a memory for storing a predetermined number of received CINRs, and an estimator calculates coefficients of a CINR estimating linear equation by using the received CINR and the previously received CINR stored in the memory, and estimates the CINR after the predetermined delay time by using the coefficients of the CINR estimating linear equation.