White Paper WHP 161 Download
In collaboration with Arqiva, NGW and OFCOM, BBC Research has recently set up an experimental 2-by-2 MIMO-DVB broadcast chain utilising a 2 x 250W ERP transmission from Guildford transmitting station, Surrey, UK. The transmitter is configurable into conventional DVB-T, dual-polar MIMO and co-polar MIMO modes. Survey work has been carried out using a vehicle equipped with a similarly configurable receiver, with the primary intention of comparing the coverage areas of the conventional and MIMO systems. A useful additional outcome of the campaign is the existence of logged impulse response data for the 2-by-2 MIMO channels allowing a provisional channel model to be proposed, albeit based on the limited data from a single transmitter. It is this latter task for the fixed-reception dual-polar case which forms the subject matter of this document.