Massive MU-MIMO
Increase fixed wireless network capacity by communicating with multiple subscribers simultaneously—without requiring additional spectrum.
Key Features
Higher Sector Capacity
Serve multiple subscribers concurrently to increase overall sector throughput and make better use of available airtime.
Greater Spectral Efficiency
Increase capacity within the same channel bandwidth instead of requiring additional wireless spectrum.
Intelligent Beamforming
Create narrow, targeted beams that improve signal performance while limiting interference in other directions.
Uplink and Downlink MU-MIMO
Support simultaneous communication with multiple subscribers in both directions, unlike the downlink-only MU-MIMO implementation described for 802.11ac in the paper.
From MIMO to Massive MU-MIMO
- Single-polarization systems use one stream.
- 2×2 MIMO uses two antenna elements and can carry two streams.
- Traditional MIMO typically improves capacity for one subscriber at a time.
- MU-MIMO divides the antenna array’s capacity among multiple subscribers.
- Massive MIMO uses larger antenna arrays and more advanced signal processing.
How MU-MIMO Works
Key technologies:
- Beamforming directs narrow radio beams toward individual subscribers.
- Spatial multiplexing allows multiple beams to operate concurrently in the same spectrum.
- Channel sounding measures the radio channel between the access point and each subscriber.
- Dynamic grouping selects subscribers that can transmit or receive together efficiently.
Benefits for Network Operators
- Support more subscribers in each sector.
- Deliver higher average throughput to existing subscribers.
- Increase capacity without expanding channel bandwidth.
- Reduce interference through narrowly directed transmit and receive beams.
- Improve link performance and modulation levels.
- Protect existing PMP 450 subscriber investments.
- Scale capacity as network demand grows.
Build More Capacity into Your Network
PMP 450m Platform
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