Cable operator Liberty Global has announced it will acquire German broadband cable operator Unitymedia for $5.2 billion. The takeover, which is expected to be completed in the first half of 2010, is designed to boost Liberty GlobalÔÇÖs presence in the European marketplace. The Englewood, Colorado-based firm, which is controlled by US cable pioneer John Malone, is already active in areas of Europe such as Austria, the Netherlands, Poland, Hungary and Romania.