Approximate capacity of a class of multi-source Gaussian relay networks
作者： Sang-Woon Jeon , Sae-Young Chung , Syed A. Jafar
关键词: Markov process 、 Interference (wave propagation) 、 Physics 、 Gaussian 、 Block code 、 Integer (computer science) 、 Computer network 、 Relay 、 Topology 、 Fading 、 Rayleigh fading
摘要: We study K-user M-hop Gaussian relay networks with K m nodes in the m-th layer, where M is even and = 1 M+1 . observe that time-varying nature of wireless channels (fading) can be exploited to mitigate inter-user interference. The proposed block Markov encoding relaying scheme exploits such channel variations works for any isotropically distributed including Rayleigh fading. show a general achievable degrees freedom (DoF) region this class networks, which coincides cut-set outer bound if M/K min an integer, {K }. Therefore, we completely characterize DoF case integer.
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