Can Reciprocal RIS Perform as Non-Reciprocal RIS?

2026-10-23来源 arXiv math.ITEnglish
arXiv:2610.30896v1 Announce Type: new Abstract: Yes, if and only if some optimal non-reciprocal RIS (i.e., maximizing a given performance metric) makes the round-trip channel transmitter-RIS-transmitter symmetric, which holds if the channel transmitter-RIS has rank one or if single-stream transmission is optimal.

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