ITERATIVE ESTIMATION AND EQUALISATION OF ASYMMETRIES BETWEEN INPHASE AND QUADRATURE BRANCHES IN MULTI-CARRIER TRANSMISSION SYSTEMS

摘要

A kind of method of the present invention is used to estimate and correct the radio signal of distortion, IQ asymmetry and channel distortion due to transmitter or receiver-side, the form or burst of the frame of the multicarrier transmitting method of transmission occurs. Multicarrier transmitting method be it is known, for example, the method for the OFMD. The deformation and generate transmitters and receivers side IQ asymmetry. It is observed in linear distortion subcarrier due to multipath extended wireless radio channel. This method is based on the idea that the IQ asymmetry in transmitter or receiver-side is known. If an IQ distorts, matrix is known, and the corresponding other IQ distortion squares and channel coefficients of coefficient are iteratively estimated and receive symbol level equalizer and severing thereon. Block, which handles the multi-carrier data symbol received by code character, can then occur.