Channel Condition and Outage Performance of Mode-Division-Multiplexing Enabled MIMO System With Zero-Forcing Receiver

作者：Lei, Yi; Lu, Qi; Chen, Bin^*; Guo, Zhongyi

来源：IEEE Communications Letters, 2022, 26(10): 2390-2394.

DOI：10.1109/LCOMM.2022.3189978

• Optical fiber communications
• radio-over-fiber
• multiple-input multiple-output
• mode-division multiplexing

Reusing the widely deployed multimode fibers (MMFs) in buildings to transmit multiple-input multiple-output (MIMO) signals via mode-division multiplexing (MDM) is an attractive solution to provide low-cost indoor wireless coverage. However, due to the random mode coupling, MMF channel varies over time. In this letter, the MDM-based MMF MIMO channel condition for different fiber lengths is studied. Next, the influence of the fluctuation of channel condition on the outage performance of the MIMO system with zero-forcing receiver is analyzed, in terms of information-theoretic capacity and practical error probability. Finally, by using adaptive coded modulation (according to channel condition), the MDM-based 3 x 3 MIMO channel achieves up to 8.62 bit/s/Hz spectral efficiency with 10% outage probability.