LoS MIMO in Full Outdoor Microwave Radio

The “ultimate” spectral efficiency, achievable with today technology, can be reached with a MIMO (4,4) DP configuration.

In this case, assuming 256 QAM as maximum modulation format (three residual interfering signals on the same radio channel representing the limiting factor for this upper limit complexity), a 32 bit/s/Hz specrum efficiency is obtained, more than three times the efficiency of a standard (SISO) link operating at 1024 QAM.

By this way, a total gross capacity of nearly 1 Gbps can be carried on a 28 MHz (ETSI) or 30 MHz (ANSI) single radio channel.

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