A technique for combining equalization with differential detection /
Kenneth Mark Aleong · eScholarship@McGill (McGill) · 1991
A technique for combining equalization and differentially coherent detection is proposed for use in wireless communication when carrier phase recovery is difficult. A decision-feedback differentially coherent scheme, which generates an improved reference phase, is combined with a linear equalizer and the LMS algorithm is used to adapt the equalizer to an unknown channel. In addition, the proposed receiver is simulated for various two-dimensional signal constellations over multipath channels. It is shown that for high SNR, the degradation of this structure is negligible with respect to combined coherent detection and equalization. Therefore, this equalized differentially coherent detection scheme can be used when carrier phase tracking (i.e. coherent detection) is difficult and intersymbol interference is a major obstacle.