Physics-grounded Mechanism Design for Spectrum Sharing between Passive and Active Users
This addresses spectrum sharing for radiometric retrieval and communication systems, offering a novel integration of physics and economics, though it is incremental in applying known mechanisms to a specific domain.
The paper tackles the problem of dynamic spectrum sharing between passive and active users by proposing a physics-grounded mechanism design based on VCG auctions, which reduces procurement costs by about 60% over a baseline while meeting accuracy targets.
We propose a physics-grounded mechanism design for dynamic spectrum sharing that bridges the gap between radiometric retrieval constraints and economic incentives. We formulate the active and passive users coexistence problem as a Vickrey-Clarke-Groves (VCG) auctions mechanism, where the radiometer dynamically procures ``quiet'' time-frequency tiles from active users based on the marginal reduction in retrieval error variance. This approach ensures allocative efficiency and dominant-strategy incentive compatibility (DSIC). To overcome the computational intractability of exact VCG on large grids, we derive an approximation algorithm by using the monotone submodularity induced by the radiometer equation. AMSR-2-based simulations show that the approach avoids high-cost tiles by aggregating low-cost spectrum across time and frequency. In an interference-trap case study, the proposed framework reduces procurement costs by about 60% over a fixed-band baseline while satisfying accuracy targets.