Adaptive receiver for cross-polarized digital transmission

This paper introduces a new kind of depolarization equalizer, based on the conventional adaptive linear equalization, and shows that the capacity of a given frequency allocation can be doubled, while satisfying the outage probability objective. Crosstalk elimination for entangled depolarization due to a non-regenerative repeater, due to a selective fading channel and due to timing differences between orthogonal data are simulated. The superiority of this proposed equalizer is proven in comparison with existing cancellation systems. Finally, more efficient utilization of available bandwidth in a 4 GHz band is proposed by using the co-channel allocation plan with this new equalizer. More than 1800 channels can be carried with feasible modems, in a 20 MHz bandwidth where even 1152 channels are very hard to carry for 32 QAM single modem.