A unique porous material can be prepared by carbonizing montmorillonite/acriflavine complex (MAC). Control of its porous structure was attempted by freeze-drying MAC blocks having various water content. The porous structure was changed over a wide range (pore volume: 1-3ml/g, pore radius: 40-240nm) by water content in MAC. Particle size of raw montmorillonite also caused certain effects. When pore volume increased, pore size also increased, i.e., both properties could not be controlled independently. In spite of such changes, uniform pore size distribution and characteristic card-house structure were kept. The porous structure was stable up to 1073K under nitrogen.

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We propose a novel joint modulation and demodulation optimization scheme without the differentiable channel model. Simulations show that our proposed scheme realizes higher phase noise tolerance than the conventional strategies.