California-based wireless access solutions provider Blue Danube Systems has announced that it has completed what it claims are the first commercial trials of its Massive multiple-input, multiple-output (MIMO) system using licensed frequency division duplex LTE (FDD-LTE) spectrum. According to the vendor, the trials were conducted in association with Shenandoah Telecommunications Company (Shentel) and AT&T, an investor in Blue Danube Systems. The vendor notes that the tests were conducted using Blue Danube’s BeamCraft 500 active antenna product for advanced 3D beamforming, which is capable of delivering 160W of transmit power for a Massive MIMO system. TeleGeography notes that beamforming is a signal processing technique that directs signals from multiple antennas towards where mobile customers are situated. Looking ahead, Blue Danube notes that a second phase of trials is now ongoing to test additional operational modes and traffic scenarios.