Experimental results and transceiver hardware design for fixed broadband wireless non-line-of-sight transmission: up to 1 gbit/sec in 4.6 MHz

We describe and discuss the results of some experimental outdoor field trials which demonstrate-for the first time-the hardware feasibility of fixed broadband wireless radio links with spectral efficiencies in excess of 50 bit/sec/Hz in severe multipath frequency selective environments (non line-of-sight). Custom cost-effective hardware has allowed data transmission in the range 60-960 Mbit/sec occupying a bandwidth of 2-4-5 MHz at MMDS frequencies (/spl sime/2.5 GHz). We also introduce a new modeling methodology inspired by basic theoretical physics which gives a different and practical perspective to the spatio-temporal transmission problem. Previously reported hardware experiments using the same concept have addressed the simpler problem of indoor communications in a 30 kHz cellular channel. The developed technology has the potential of making practical and cost effective the deployment of high capacity microwave data communications equipment for point to point and point to multipoint systems.