Cochannel systems: optimum link length with polarisation driven power control for systems working at high frequencies and without copolar canceller

The main reasons for bad performance of cochannel systems working at high frequencies during a rain fading are: 1) H channel has stronger attenuation than V. 2) XPD is reduced (it isn´t a symmetrical function). By limiting the maximum power of V channel the global performance is improved: V channel lower power will not worsen global performance (extra power would not improve the hop length due to limiting H channel) and H channel will benefit from a reduced cross polar interference level that allows increasing the link length. The advantages are reduced cost of systems (copolar canceller isn´t needed), simpler installation and simpler application to already installed radio units when increased capacity is needed.