Channel intrinsic dimensionality dNL (5-35) sets the scaling ceiling for wireless foundation models, with diminishing returns past ~30M parameters and pilot-aided test-time training on 12M models beating 96M static models by 7-10 dB.
A distributed massive MIMO channel sounder
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How Big Should a Wireless Foundation Model Be?
Channel intrinsic dimensionality dNL (5-35) sets the scaling ceiling for wireless foundation models, with diminishing returns past ~30M parameters and pilot-aided test-time training on 12M models beating 96M static models by 7-10 dB.