Abstract
This paper presents an Internet of Things (IoT) model with extremely high multi-user capacity. The IoT model has $K$ access points communicating with $K$ devices in an all-to-all configuration, generally referred to as $K$ -User MIMO. To the author's awareness, the combination of multi-user IoT within a $K$ -User MIMO framework has not been previously analyzed. The IoT $K$ -User MIMO networks described improve upon prior multi-user capacity results through the application of a new beamformer modality. This paper also derives a new theorem for the upper bound $K$ -user MIMO capacity as a function of $K$ and illustrates its application in realistic scenarios. The analytical results are compared with 5G Massive MIMO with an equivalent number of network antennas. Under this framework, an upper bound multi-user capacity of 2500 bits/sec/Hz for a $K$ = 7 IoT network in Rayleigh fading is illustrated. This represents a 10 $X$ higher upper bound capacity compared to 5G Massive MIMO. Finally, realistic $K$ = 3 network performance is analyzed in Rayleigh Fading environments with LTE Typical Urban power delay profiles. The cumulative distribution of the capacity is presented for 100, 500, and 1000 meter cell geometries.
Published Version
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