Patent ID: 7652976

Claim:
A method for compensating IQ imbalance in a receiver, comprising: receiving an OFDM signal; translating the OFDM signal into frequency domain to form a translated OFDM signal, where the translated OFDM signal has N sub-carriers; and generating an IQ imbalance compensation factor β α * to an IQ imbalance compensator according to B - B 2 - 4 2 , wherein expressing ∑ k ⁢ ⁢ Y ⁡ ( k ) ⁢ Y ⁡ ( N - k + 2 ) ∑ k ⁢ ⁢ Y ⁡ ( k ) ⁢ Y * ( k ) + ∑ k ⁢ ⁢ Y ⁡ ( N - k + 2 ) ⁢ Y * ( N - k + 2 ) as B, where Y(k) is the k-th sub-carrier of the translated signal, Y(N−k+2) is the (N−k+2)-th sub-carrier of the translated signal, Y*(k) is the complex conjugate of Y(k), and Y*(N−k+2) is the complex conjugate of Y(N−k+2).