The Next Breakthrough in Indoor Wireless: Distributed Massive MIMO

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By Dimitris Mavrakis | 4Q 2020 | IN-5993

 

State of the In-Building Wireless Market in the 5G Era

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In the 5G era, traditional Distributed Antenna Systems (DASs) are facing several limitations to incorporating 5G and increasing overall system capacity. These limitations are mainly associated with two factors: 1) the new frequency bands in which 5G typically operates and 2) the major infrastructure work needed to increase the capacity of the system. The higher frequencies in which 5G typically operates (C-band and mmWave) present higher power losses in the feeder, which will ultimately result in higher deployment costs (due to additional infrastructure required), reduced coverage footprint, and poor performance. To augment capacity, extra feeder cables and passive/active components are required, along with reconstructive engineering to meet 5G requirements.

In-building wireless systems have transitioned from the analog domain that uses co-axial feeder cables, i.e., from DAS to the digital domain, where analog cab...

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