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A new 16-ary constellation mapping scheme is presented for threedimensional (3D) orthogonal frequency division multiplexing (OFDM) systems. The minimum Euclidean distance of the constellations of the proposed 16-ary mapping is increased compared with conventional 16-ary mappings having the same normalised average power. Simulations show that the 3D OFDM system with the proposed 16-ary mapping scheme...
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