On the Capacity Regions of Degraded Relay Broadcast Channels with and without Feedback

doi:10.3390/e22070784

	On the Capacity Regions of Degraded Relay Broadcast Channels with and without Feedback
	Hu, Bingbing1,2,3 ; Wang, Ke 1,2,3; Ma, Yingying1,2,3 ; Wu, Youlong1
	2020-07
发表期刊	ENTROPY (IF:2.1[JCR-2023],2.2[5-Year])
EISSN	1099-4300
卷号	22 期号:7
发表状态	已发表
DOI	10.3390/e22070784
摘要	The four-node relay broadcast channel (RBC) is considered, in which a transmitter communicates with two receivers with the assistance of a relay node. We first investigate three types of physically degraded RBCs (PDRBCs) based on different degradation orders among the relay and the receivers' observed signals. For the discrete memoryless (DM) case, only the capacity region of the second type of PDRBC is already known, while for the Gaussian case, only the capacity region of the first type of PDRBC is already known. In this paper, we step forward and make the following progress: (1) for the first type of DM-PDRBC, a new outer bound is established, which has the same rate expression as an existing inner bound, with only a slight difference on the input distributions; (2) for the second type of Gaussian PDRBC, the capacity region is established; (3) for the third type of PDRBC, the capacity regions are established both for DM and Gaussian cases. Besides, we also consider the RBC with relay feedback where the relay node can send the feedback signal to the transmitter. A new coding scheme based on a hybrid relay strategy and a layered Marton's coding is proposed. It is shown that our scheme can strictly enlarge Behboodi and Piantanida's rate region, which is tight for the second type of DM-PDRBC. Moreover, we show that capacity regions of the second and third types of PDRBCs are exactly the same as that without feedback, which means feedback cannot enlarge capacity regions for these types of RBCs.
关键词	relay broadcast channel capacity region feedback
URL	查看原文
收录类别	SCI ; SCIE
语种	英语
资助项目	NSFC[61901267]
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000554095500001
出版者	MDPI
WOS关键词	THEOREMS
原始文献类型	Article
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/122954
专题	信息科学与技术学院_硕士生信息科学与技术学院_PI研究组_吴幼龙组
通讯作者	Wu, Youlong
作者单位	1.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 201210, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, Shanghai 200050, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	信息科学与技术学院
通讯作者单位	信息科学与技术学院
第一作者的第一单位	信息科学与技术学院
推荐引用方式 GB/T 7714	Hu, Bingbing,Wang, Ke,Ma, Yingying,et al. On the Capacity Regions of Degraded Relay Broadcast Channels with and without Feedback[J]. ENTROPY,2020,22(7).
APA	Hu, Bingbing,Wang, Ke,Ma, Yingying,&Wu, Youlong.(2020).On the Capacity Regions of Degraded Relay Broadcast Channels with and without Feedback.ENTROPY,22(7).
MLA	Hu, Bingbing,et al."On the Capacity Regions of Degraded Relay Broadcast Channels with and without Feedback".ENTROPY 22.7(2020).