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We propose two application-layer coding schemes for delay-constrained point-to-point packet communications with restrictions on the transmitter&#x2019;s maximum duty-cycle. The schemes operate over GF(2) and utilize intermittently available receiver feedback for erasure correction. Applications that will benefit from the proposed schemes include wireless sensor networks in which energyconstrained sensors must deliver readings to a gateway within a deadline. Simulation results for independent Bernoulli erasure channels, Gilbert-Elliott channels, and Long Range (LoRa) communications demonstrate orders-of-magnitude reductions in the delivery failure rate as compared to feedback-assisted repetition redundancy and a blind coding scheme that does not utilize feedback.

Application-Layer Coding with Intermittent Feedback Under Delay and Duty-Cycle Constraints