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- W3005308450 abstract "Consider the following communication scenario. An encoder observes a stochastic process and causally decides when and what to transmit about it, under a constraint on the expected number of bits transmitted per second. A decoder uses the received codewords to causally estimate the process in real time. The encoder and the decoder are synchronized in time. For a class of continuous Markov processes satisfying regularity conditions, we find the optimal encoding and decoding policies that minimize the end-to-end estimation mean-square error under the rate constraint. We show that the optimal encoding policy transmits a $1$-bit codeword once the process innovation passes one of two thresholds. The optimal decoder noiselessly recovers the last sample from the 1-bit codewords and codeword-generating time stamps, and uses it to decide the running estimate of the current process, until the next codeword arrives. In particular, we show the optimal causal code for the Ornstein-Uhlenbeck process and calculate its distortion-rate function. Furthermore, we show that the optimal causal code also minimizes the mean-square cost of a continuous-time control system driven by a continuous Markov process and controlled by an additive control signal." @default.
- W3005308450 created "2020-02-14" @default.
- W3005308450 creator A5001633086 @default.
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- W3005308450 date "2020-02-04" @default.
- W3005308450 modified "2023-09-25" @default.
- W3005308450 title "Optimal Causal Rate-Constrained Sampling for a Class of Continuous Markov Processes" @default.
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- W3005308450 doi "https://doi.org/10.48550/arxiv.2002.01581" @default.
- W3005308450 hasPublicationYear "2020" @default.
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