DocumentCode :
31868
Title :
Relaying for Multiuser Networks in the Absence of Codebook Information
Author :
Ye Tian ; Yener, Aylin
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., State College, PA, USA
Volume :
61
Issue :
3
fYear :
2015
fDate :
Mar-15
Firstpage :
1247
Lastpage :
1256
Abstract :
This paper considers relay assisted transmission for multiuser networks when the relay has no access to the codebooks used by the transmitters. The relay is called oblivious for this reason. Of particular interest is the generalized compress-and-forward (GCF) strategy, where the destinations jointly decode the compression indices and the transmitted messages, and their optimality in this setting. The relay-to-destination links are assumed to be out-of-band with finite capacity. Two models are investigated: 1) the multiple access relay channel (MARC) and 2) the interference relay channel (IFRC). For the MARC with an oblivious relay, a new outerbound is derived and it is shown to be tight by means of achievability of the capacity region using GCF scheme. For the IFRC with an oblivious relay, a new strong interference condition is established, under which the capacity region is found by deriving a new outerbound and showing that it is achievable using GCF scheme. The result is further extended to establish the capacity region of M-user MARC with an oblivious relay, and multicast networks containing M sources and K destinations with an oblivious relay.
Keywords :
channel coding; decode and forward communication; electronic messaging; multicast communication; multiuser channels; radio links; radio transmitters; radiofrequency interference; relay networks (telecommunication); wireless channels; GCF scheme; IFRC; M-user MARC; compression indices decode; generalized compress and forward strategy; interference relay channel; multicast network; multiple access relay channel; multiuser network relay assisted transmission; relay assisted transmission; relay-to-destination link; strong interference condition; transmitted messages, decode; transmitter codebook; Decoding; Encoding; Indexes; Interference; Markov processes; Random variables; Relays; Oblivious relay; capacity; generalized compress and forward; interference relay channel; multiple access relay channel;
fLanguage :
English
Journal_Title :
Information Theory, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9448
Type :
jour
DOI :
10.1109/TIT.2015.2394406
Filename :
7017581
Link To Document :
بازگشت