Patent ID: 8018991

Claim:
A method for estimating a Carrier-to-Interference and Noise Ratio (CINR) in a communication system, comprising: 1) generating a signal, including a traffic allocation available area for allocating a traffic signal and a preamble allocation available area for allocating a preamble signal, by Fast Fourier Transform (FFT)-processing a received symbol, the traffic allocation available area comprising the preamble allocation available area; 2) calculating power values of preamble tones included in the preamble allocation available area; 3) calculating a carrier power value using the power values of the preamble tones; 4) calculating a partial noise-interference power value using, (a) power differences between the preamble tones and (b) power values of remaining tones other than the preamble tones; 5) calculating a noise power value using power values of tones included in a noise power estimation area, the noise power estimation area being an area of the traffic allocation available area other than the preamble allocation available area; and 6) calculating the CINR using the carrier power value, the partial noise-interference power value, and the noise power value.