The paper formulates a joint optimization of tunable capacitance matrix and subcarrier power allocation for a frequency-dependent BD-IRS in OFDM, claiming rate gains over benchmarks, but the solution contains flawed derivations.
Capacity characterization for intelligent reflecting surface aided MIMO communication,
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Beyond Diagonal IRS Aided OFDM: Rate Maximization under Frequency-Dependent Reflection
The paper formulates a joint optimization of tunable capacitance matrix and subcarrier power allocation for a frequency-dependent BD-IRS in OFDM, claiming rate gains over benchmarks, but the solution contains flawed derivations.