Patent ID: 8654745

Claim:
A method for reporting a channel state in a wireless communication system, the method comprising: receiving downlink signals on a plurality of subcarriers; determining first channel state information for the downlink signals by using SINR = ∑ k = 0 n - 1 ⁢ s k 2 / ∑ k = 0 n - 1 ⁢ ( I k 2 + N k 2 ) ; determining second channel state information for the downlink signals by using SINR c = ∑ k = 0 n / p - 1 ⁢ ( ∑ j = 0 p - 1 ⁢ c j ⁢ s kp + j ) 2 / ∑ k = 0 n / p - 1 ⁢ ( ∑ j = 0 p - 1 ⁢ c j ⁡ ( I kp + j + N kp + j ) ) 2 ; and transmitting at least the first channel state information or the second channel state information, wherein s x represents a signal strength of a subcarrier x, I x represents an interference strength on the subcarrier x, N x represents a noise strength on the subcarrier x, k is an integer greater than or equal to 0, c j represents a j-th element of a length-p masking sequence, p is an integer greater than or equal to 2, and j is an integer ranging from 0 to (p−1).