scope:

The present document provides, initially, a theoretical overview of how point-to-point systems that use SFRC could improve the link capacity and/or system gain, or could focus power in different directions or cover an area. Focus is put on LOS links.

In general these different results may "compete" with one another and for example an increase of capacity may require an increase of system gain. Few basic methods for implementing SFR are provided in the present document.

Simulation and field trial results are provided in order to show the discussed techniques and the main improvements for the SFRC over the "Internal" Co-Channel Interference (ICCI).

Main report subjects:

Increase the link capacity (by increasing the spectral efficiency).

Increase the link system gain (by increasing the receiver SNR).

Methods of implementing SFR (by using MIMO).

Verification by simulations and trials.

Improvement parameter definition.

Planning matters (installation issues and availability calculation).

Living list for standard modifications.