This paper considers the problem of communicating private messages over Gaussian broadcast channels with receiver message side information and proposes a separate physical and network coding strategy that combines layered codes and linear index codes. Though generally suboptimal, the proposed separate physical and network coding scheme is shown to achieve the capacity region of the channel within one bit per user with less or equal to three users for any given channel parameters and any given side information configuration.
['Jae Won Yoo', 'Tie Liu', 'Feng Xue']
Gaussian broadcast channels with receiver message side information