BAE Systems spends $2.2 billion on U.S. electronic systems units

British defence company BAE Systemssaid it would spend $2.2 billion (£1.69 billion) to help grow its U.S.-based Electronic Systems business, picking up two units being offloaded as a result of the merger of U.S. rivals Raytheon and United Technologies.BAE Systems said the acquisitions, of a military-focused GPS unit from Collins, part of United Technologies Corpand an airborne tactical radios unit, owned by Raytheon, were dependent on the closure of the pair's merger.Charles Woodburn, chie