SELF ESTIMATION AND COMPENSATION SCHEME FOR IQ IMBALANCE OF DIRECT CONVERSION TRANSCEIVER IN OFDM SYSTEM

摘要

In the OFDM system according to an embodiment of the present invention, an IQ imbalance estimation and compensation scheme of a direct conversion transceiver includes an in-phase / quadrature-phase (I / Q) imbalance component using one orthogonal frequency division multiplexing (OFDM) symbol. (ε _tx , ε _rx , θ _tx , θ _rx ) and the distortion components α, β, γ, δ; Receiving the distortion components (α, β) and distorting the baseband transmission signal in a time domain after an Inverse Fast Fourier Transform (IFFT); And receiving the distortion components γ and δ to compensate for the distorted baseband received signal in a time domain before a Fast Fourier Transform (FFT).