OTA channel labels derived from noisy received signals carry input-correlated supervision noise, so learned channel estimators peak at intermediate measured-data fractions, while end-to-end receivers with error-free bit supervision improve monotonically.
HybridDeepRx: Deep Learning Receiver for High-EVM Signals,
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Input-Correlated Supervision Noise Limits the Benefits of OTA Training for Learned Receivers
OTA channel labels derived from noisy received signals carry input-correlated supervision noise, so learned channel estimators peak at intermediate measured-data fractions, while end-to-end receivers with error-free bit supervision improve monotonically.