On the Energy-Distortion Tradeoff of Gaussian Broadcast Channels with Feedback
AbstractThis work studies the relationship between the energy allocated for transmitting a pair of correlated Gaussian sources over a two-user Gaussian broadcast channel with noiseless channel output feedback (GBCF) and the resulting distortion at the receivers. Our goal is to characterize the minimum transmission energy required for broadcasting a pair of source samples, such that each source can be reconstructed at its respective receiver to within a target distortion, when the source-channel bandwidth ratio is not restricted. This minimum transmission energy is defined as the energy-distortion tradeoff (EDT). We derive a lower bound and three upper bounds on the optimal EDT. For the upper bounds, we analyze the EDT of three transmission schemes: two schemes are based on separate source-channel coding and apply encoding over multiple samples of source pairs, and the third scheme is a joint source-channel coding scheme that applies uncoded linear transmission on a single source-sample pair and is obtained by extending the Ozarow–Leung (OL) scheme. Numerical simulations show that the EDT of the OL-based scheme is close to that of the better of the two separation-based schemes, which makes the OL scheme attractive for energy-efficient, low-latency and low-complexity source transmission over GBCFs. View Full-Text
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Murin, Y.; Kaspi, Y.; Dabora, R.; Gündüz, D. On the Energy-Distortion Tradeoff of Gaussian Broadcast Channels with Feedback. Entropy 2017, 19, 243.
Murin Y, Kaspi Y, Dabora R, Gündüz D. On the Energy-Distortion Tradeoff of Gaussian Broadcast Channels with Feedback. Entropy. 2017; 19(6):243.Chicago/Turabian Style
Murin, Yonathan; Kaspi, Yonatan; Dabora, Ron; Gündüz, Deniz. 2017. "On the Energy-Distortion Tradeoff of Gaussian Broadcast Channels with Feedback." Entropy 19, no. 6: 243.
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