Figure 4: Results of 32 Gbit s−1 data transmission using eight pol-muxed mm-wave OAM channels. | Nature Communications

Figure 4: Results of 32 Gbit s−1 data transmission using eight pol-muxed mm-wave OAM channels.

From: High-capacity millimetre-wave communications with orbital angular momentum multiplexing

Figure 4

(a) Constellations of the received 1-Gbaud 16-QAM signals for OAM channel ℓ=+3 under single Y-pol and dual-pol conditions. The SNR is 19 dB. (b) Measured BER curves of 1-Gbaud 16-QAM signals for (i) a single OAM channel (no crosstalk), (ii) four OAM channels on Y-pol (with crosstalk, Y-pol) and (iii) eight OAM channels on both X-and Y-pol (with crosstalk, X-pol and Y-pol).

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