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By identifying the similarities and differences between multiple-input-multiple-output (MIMO) and directional modulation (DM) technologies, a new approach for the synthesis of DM transmitters is proposed in this letter. The synthesis method is validated using DM simulation examples, in free space and in a simplified multipath environment, using bit error rate (BER) as the performance metric.
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Ding et al. (2015) studied this question.
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