TY - JOUR
T1 - Compound multiple-access channels with partial cooperation
AU - Simeone, Osvaldo
AU - Gündüz, Deniz
AU - Poor, H. Vincent
AU - Goldsmith, Andrea J.
AU - Shamai, Shlomo
N1 - Funding Information:
Manuscript received July 28, 2008; revised February 24, 2009. Current version published May 20, 2009. This work was supported by the National Science Foundation (NSF) under Grants CNS-06-26611 and CNS-06-25637, the DARPA ITMANET program under Grant 1105741-1-TFIND, and the ARO under MURI award W911NF-05-1-0246. The work of S. Shamai was supported by the Israel Science Foundation and the European Commission in the framework of the FP7 Network of Excellence in Wireless COMmunications NEWCOM++. The material in this paper was presented in part at the 46th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, September 2008.
PY - 2009
Y1 - 2009
N2 - A two-user discrete memoryless compound multiple-access channel (MAC) with a common message and conferencing decoders is considered. The capacity region is characterized in the special cases of physically degraded channels and unidirectional cooperation, and achievable rate regions are provided for the general case. The results are then extended to the corresponding Gaussian model. In the Gaussian setup, the provided achievable rates are shown to lie within some constant number of bits from the boundary of the capacity region in several special cases. An alternative model, in which the encoders are connected by conferencing links rather than having a common message, is studied as well, and the capacity region for this model is also determined for the cases of physically degraded channels and unidirectional cooperation. Numerical results are also provided to obtain insights about the potential gains of conferencing at the decoders and encoders.
AB - A two-user discrete memoryless compound multiple-access channel (MAC) with a common message and conferencing decoders is considered. The capacity region is characterized in the special cases of physically degraded channels and unidirectional cooperation, and achievable rate regions are provided for the general case. The results are then extended to the corresponding Gaussian model. In the Gaussian setup, the provided achievable rates are shown to lie within some constant number of bits from the boundary of the capacity region in several special cases. An alternative model, in which the encoders are connected by conferencing links rather than having a common message, is studied as well, and the capacity region for this model is also determined for the cases of physically degraded channels and unidirectional cooperation. Numerical results are also provided to obtain insights about the potential gains of conferencing at the decoders and encoders.
KW - Compound channels
KW - Conferencing
KW - Cooperation
KW - Multiple-access channel (MAC)
UR - https://www.scopus.com/pages/publications/66949112208
UR - https://www.scopus.com/pages/publications/66949112208#tab=citedBy
U2 - 10.1109/TIT.2009.2018343
DO - 10.1109/TIT.2009.2018343
M3 - Article
AN - SCOPUS:66949112208
SN - 0018-9448
VL - 55
SP - 2425
EP - 2441
JO - IEEE Transactions on Information Theory
JF - IEEE Transactions on Information Theory
IS - 6
ER -