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- W2007322115 abstract "In this paper, we study the achievable rate region of two-user Gaussian broadcast channel (GBC) when the messages to be transmitted to both the users take values from finite signal sets and the received signal is quantized at both the users. We refer to this channel as quantized broadcast channel (QBC). We first observe that the capacity region defined for a GBC does not carry over as such to QBC. Also, we show that the optimal decoding scheme for GBC (i.e., high SNR user doing successive decoding and low SNR user decoding its message alone) is not optimal for QBC. We then propose an achievable rate region for QBC based on two different schemes. We present achievable rate region results for the case of uniform quantization at the receivers. We find that rotation of one of the user's input alphabet with respect to the other user's alphabet marginally enlarges the achievable rate region of QBC when almost equal powers are allotted to both the users." @default.
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- W2007322115 date "2012-02-01" @default.
- W2007322115 modified "2023-10-16" @default.
- W2007322115 title "Achievable rate region of gaussian broadcast channel with finite input alphabet and quantized output" @default.
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- W2007322115 doi "https://doi.org/10.1109/ncc.2012.6176887" @default.
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