Short-Packet Transmission via Variable-Length Codes in the Presence of Noisy Stop Feedback

We present an upper bound on the error probability achievable using variable-length stop feedback (VLSF) codes, for a fixed size of information payload and given constraint maximum latency average service time. Differently from proposed in Polyanskiy et al. (2011), which pertains to scenario signal is sent over noiseless channel, our applies practically relevant setup link noisy. Numerical evaluation suggests that, reliability constraints, noise may increase minimum time VLSF scheme considered this paper, extent that fixed-length codes without be preferable some scenarios.