TY - JOUR
T1 - Capacity gain from two-transmitter and two-receiver cooperation
AU - Ng, Chris T.K.
AU - Jindal, Nihar
AU - Goldsmith, Andrea J.
AU - Mitra, Urbashi
N1 - Funding Information:
Manuscript received August 16, 2006; revised April 26, 2007. This work was supported by the U.S. Army under MURI Award W911NF-05-1-0246 , the ONR under Award N00014-05-1-0168, DARPA’s ITMANET program under Grant 1105741-1-TFIND, a grant from Intel, and the National Science Foundation ITR under Grant CCF-0313392. The material in this correspondence was presented in part at the IEEE International Symposium on Information Theory, Chicago, IL, June/July 2004, and at the IEEE Information Theory Workshop, San Antonio, TX, October 2004.
PY - 2007/10
Y1 - 2007/10
N2 - Capacity improvement from transmitter and receiver cooperation is investigated in a two-transmitter, two-receiver network with phase fading and full channel state information (CSI) available at all terminals. The transmitters cooperate by first exchanging messages over an orthogonal transmitter cooperation channel, then encoding jointly with dirty-paper coding. The receivers cooperate by using Wyner-Ziv compress-and-forward over an analogous orthogonal receiver cooperation channel. To account for the cost of cooperation, the allocation of network power and bandwidth among the data and cooperation channels is studied. It is shown that transmitter cooperation outperforms receiver cooperation and improves capacity over noncooperative transmission under most operating conditions when the cooperation channel is strong. However, a weak cooperation channel limits the transmitter cooperation rate; in this case, receiver cooperation is more advantageous. Transmitter-and-receiver cooperation offers sizable additional capacity gain over transmitter-only cooperation at low signal-to-noise ratio (SNR), whereas at high SNR transmitter cooperation alone captures most of the cooperative capacity improvement.
AB - Capacity improvement from transmitter and receiver cooperation is investigated in a two-transmitter, two-receiver network with phase fading and full channel state information (CSI) available at all terminals. The transmitters cooperate by first exchanging messages over an orthogonal transmitter cooperation channel, then encoding jointly with dirty-paper coding. The receivers cooperate by using Wyner-Ziv compress-and-forward over an analogous orthogonal receiver cooperation channel. To account for the cost of cooperation, the allocation of network power and bandwidth among the data and cooperation channels is studied. It is shown that transmitter cooperation outperforms receiver cooperation and improves capacity over noncooperative transmission under most operating conditions when the cooperation channel is strong. However, a weak cooperation channel limits the transmitter cooperation rate; in this case, receiver cooperation is more advantageous. Transmitter-and-receiver cooperation offers sizable additional capacity gain over transmitter-only cooperation at low signal-to-noise ratio (SNR), whereas at high SNR transmitter cooperation alone captures most of the cooperative capacity improvement.
KW - Capacity
KW - Dirty-paper coding
KW - Power and bandwidth allocation
KW - Transmitter and receiver cooperation
KW - Wireless ad hoc network
KW - Wyner-Ziv compress-and-forward
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U2 - 10.1109/TIT.2007.904987
DO - 10.1109/TIT.2007.904987
M3 - Article
AN - SCOPUS:35148829355
SN - 0018-9448
VL - 53
SP - 3822
EP - 3827
JO - IEEE Transactions on Information Theory
JF - IEEE Transactions on Information Theory
IS - 10
ER -