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In our simulation work, the receiving rate of NOMA node will change significantly with the depth of the node under the same transmission condition. According to the formula in the previous section, we believe that this change is closely related to the solar radiation noise. The sum rate versus the depth of transmitter for Aided-NOMA system in three typical seawaters. It can be clearly seen that in clean seawater, the system rate reaches 1.73bps/Hz with the SOPA algorithm in the depth of 42m, and the sum rate hardly increases when the depth increases after 42m. We call it the equilibrium depth. The equilibrium depth of the system with FPA and DUA algorithms in the clean seawater are 40m, 36m around. Similarly, in coastal water, the system has a balance point within the depth of 50m and the equilibrium depths of the system with SOPA, FPA and DUA algorithms are subequal. But in pure seawater, the system sum rate increases linearly with the increase of depth when the depth of transmitter is less than 50m, i.e., the solar radiation noise still has a greater influence on the node receiving signal-to-noise ratio in this depth range. |
IEEE/ICACT20220386 Slide.16
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