Blind equalization using constant modulus algorithm adapted to OFDM/OQAM modulation

摘要

It has been proved that the blind equalization using constant modulus algorithm (CMA) is a possible solution for channel inversion in orthogonal frequency division multiplexing/offset quadrature amplitude modulation (OFDM/OQAM). However, the existing solution does not consider the residual interference that remains after equalization, and which is inherent to this type of modulation. In this paper, we propose to reconsider the value of the dispersion parameter in the update algorithm by taking into account this interference in order to enhance the blind equalization performance. The improvement of the CMA in OFDM/OQAM by means of the proposed change of parameter is demonstrated through both theoretical and numerical results.