MIMO Cable Guided Radar

Abstract

Multiple Input Multiple Output (MIMO) cable guided radar presents a true paradigm shift in leaky coaxial cable sensing. Recent technology advancements in Software Defined Radio (SDR) allow this covert terrain following radar to provide reliable detection and pinpoint the location of intruders as they cross the perimeter. MIMO operation enables the use of end-to-end correlation (patents pending) using four times the data used by traditional leaky coaxial cable sensors. Utilizing contra-directionally coupled and co-directionally coupled responses from both ends of the cables, end-to-end correlation doubles the location accuracy for a given bandwidth and reduces sensitivity to RF interference (mutual and 3rd party) – a common problem with other leaky coaxial cable sensors. Since the noise created by nearby metallic fences is a form of multipath, end-to-end correlation suppresses this common source of nuisance alarms. In addition, end-to-end correlation eliminates the need for costly “graded” cables. The use of standard leaky coaxial cables like those made in large quantity for use in communications avoids much of the wasted cable associated with graded cables and it simplifies installation and repair of the cables. These cables are designed for direct burial in many types of mediums. A cable plough can be used in many types of soil as opposed to the traditional trench and backfill approach. The cost savings in using a plough can be dramatic. The co-directionally coupled responses are used to enhance the detection process as well as to communicate response data from one processor to the next. In addition to data, a novel “split-rail” power distribution over the sensor cables minimizes the need for costly infrastructure. Since the cables are in fact the sensor, the cable and processors creates a secure power and data network around the perimeter. Applications include; prisons, nuclear power plants, military sites, VIP residences and borders.