Source-Interference Recovery Over Broadcast Channels: Asymptotic Bounds and Analog Codes

Saleh, Ahmad Abou; Alajaji, Fady; Chan, Wai-Yip

doi:10.1109/tcomm.2016.2582873

Cited by 6 publications

(1 citation statement)

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“…With the idea of layered superposition transmission and the successive canceling method, the proposed scheme shows higher accuracy of source reconstruction compared with SSCC. In [ 31 ], Saleh et al. studied the tradeoff between the distortion of the sources and the error of the interference estimation subject to the setting of the joint recovery of a bivariate Gaussian source and interference over the two-user Gaussian degraded broadcast channel in the presence of a common interference.…”

Section: Introductionmentioning

confidence: 99%

Zero-Delay Joint Source Channel Coding for a Bivariate Gaussian Source over the Broadcast Channel with One-Bit ADC Front Ends

Zhao

Chen

2021

Entropy

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In this work, we consider the zero-delay transmission of bivariate Gaussian sources over a Gaussian broadcast channel with one-bit analog-to-digital converter (ADC) front ends. An outer bound on the conditional distortion region is derived. Focusing on the minimization of the average distortion, two types of methods are proposed to design nonparametric mappings. The first one is based on the joint optimization between the encoder and decoder with the use of an iterative algorithm. In the second method, we derive the necessary conditions to develop the optimal encoder numerically. Using these necessary conditions, an algorithm based on gradient descent search is designed. Subsequently, the characteristics of the optimized encoding mapping structure are discussed, and inspired by which, several parametric mappings are proposed. Numerical results show that the proposed parametric mappings outperform the uncoded scheme and previous parametric mappings for broadcast channels with infinite resolution ADC front ends. The nonparametric mappings succeed in outperforming the parametric mappings. The causes for the differences between the performances of two nonparametric mappings are analyzed. The average distortions of the parametric and nonparametric mappings proposed here are close to the bound for the cases with one-bit ADC front ends in low channel signal-to-noise ratio regions.

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Section: Introductionmentioning

confidence: 99%