Massive MIMO (massive multiple-input multiple-output) is a type of wireless communications technology in which base stations are equipped with a very large number of antenna elements to improve spectral and energy efficiency.
The demand for wireless throughput, communication reliability, and user density will always increase. Massive MIMO technology is being developed for 5G wireless communication systems because many users can be served simultaneously with very high throughput. Processing techniques such as beamforming can concentrate the signal energy from massive MIMO antenna arrays to overcome the propagation losses inherent in high-frequency transmission in 5G systems.
How Is Massive MIMO Different?
Massive MIMO is an extension of multi-user MIMO or MU-MIMO, in which the base station transmitter simultaneously communicates with multiple mobile station receivers using the same time-frequency resources, improving the spectrum efficiency. MIMO implementation starts with a 2x2 channel antenna array. Massive MIMO systems typically have hundreds or even thousands of antenna channels in the array.