Massive MIMO 5G – Questions and Answers
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Watching television as a child in a rural town in eastern Colorado was often frustrating due to the “ghost” image that distorted our black & white television screen during my favorite programs. I remember my parents reassuring me that the TV was not broken but rather the antenna was picking up an “echo”. This echo was apparently from the front range of the Rocky Mountains some fifty miles away. It was not until much later that I learned the physics of multipath interference and the varied techniques used in analog communications to alleviate its impact. The advent of digital communications, the miniaturization of digital radio transceivers, and their enablement with significant computational capability has now enabled us to not only “fix that echo” but to take advantage of it to get more information from transmitter to receiver.