This week, we look at antennas, channel coding, and beamforming, and beam steering.
On April 25, Keysight Technologies announced a video tutorial and poster covering Massive MIMO, a radio technology that just might be incorporated into 5G wireless communications. As with last week, questions for this week's quiz come from the video, "Massive MIMO Technology Insights and Challenges." As always, answers appear on the last page.
1. The diagram below shows how adding antennas to a base station focuses a signal beam. That allows for beamforming where a signal can be pointed at a mobile device. How much of a phase shift is needed to attain the -30° beam angle?
Image courtesy of Keysight Technologies
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