By frequency shifting, we shift the frequency of 2.6G (China Mobile) and 3.5G (China Telecom and China Unicom) in the 5G-NR MIMO channel, restore them at the antenna end, and make use of the transmission mode of frequency division multiplexing to enable propagation in a single (feed cable). Straight-through signals are processed by passive unvarnished transmission, 2G/3G/4G signals can still function normally through the passive channel after power failure, and the MIMO rate after frequency-shifting restoration is more than 1.8 times that of single cable transmission.