TY - JOUR
T1 - Cellular systems with non-regenerative relaying and cooperative base stations
AU - Somekh, Oren
AU - Simeone, Osvaldo
AU - Poor, H. Vincent
AU - Shamai, Shlomo
N1 - Funding Information:
This research was supported in part by a Marie Curie Outgoing International Fellowship in the framework of the FP6, by the Israel Science Foundation (ISF) and the European Commission in the framework of the FP7 Network of Excellence in Wireless COMmunications (NEWCOM++), and in part by the U. S. National Science Foundation under Grants CNS-09-05398 and CCF-09-14899.
PY - 2010/8
Y1 - 2010/8
N2 - In this paper, the performance of cellular networks with joint multicell processing and dedicated relay terminals is investigated. It is assumed that each relay terminal is capable of full-duplex operation and receives the transmission of relay terminals in adjacent cells. Focusing on intra-cell time division multiple access and non-fading channels, a simplified relay-aided uplink cellular model is considered. Addressing the achievable per-cell sum-rate, two non-regenerative relaying schemes are considered. Interpreting the received signal at the base stations as the outcome of a two-dimensional linear time invariant system, the multicell processing rate of an amplify-and-forward scheme is derived and shown to decrease with the inter-relay interference level. A novel form of distributed compress-and-forward scheme with decoder side information is then proposed. The corresponding multicell processing rate, which is given as a solution of a simple fixed-point equation, reveals that the compress-and-forward scheme is able to completely eliminate the inter-relay interference, and it approaches a "cut-set-like" upper bound for strong relay terminal transmission power. The benefits of base-station cooperation via multicell processing over the conventional single site processing approach is also demonstrated for both protocols.
AB - In this paper, the performance of cellular networks with joint multicell processing and dedicated relay terminals is investigated. It is assumed that each relay terminal is capable of full-duplex operation and receives the transmission of relay terminals in adjacent cells. Focusing on intra-cell time division multiple access and non-fading channels, a simplified relay-aided uplink cellular model is considered. Addressing the achievable per-cell sum-rate, two non-regenerative relaying schemes are considered. Interpreting the received signal at the base stations as the outcome of a two-dimensional linear time invariant system, the multicell processing rate of an amplify-and-forward scheme is derived and shown to decrease with the inter-relay interference level. A novel form of distributed compress-and-forward scheme with decoder side information is then proposed. The corresponding multicell processing rate, which is given as a solution of a simple fixed-point equation, reveals that the compress-and-forward scheme is able to completely eliminate the inter-relay interference, and it approaches a "cut-set-like" upper bound for strong relay terminal transmission power. The benefits of base-station cooperation via multicell processing over the conventional single site processing approach is also demonstrated for both protocols.
KW - Non-regenerative relaying
KW - amplify and forward
KW - compress and forward
KW - multicell processing
UR - http://www.scopus.com/inward/record.url?scp=77955712500&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955712500&partnerID=8YFLogxK
U2 - 10.1109/TWC.2010.061710.091603
DO - 10.1109/TWC.2010.061710.091603
M3 - Article
AN - SCOPUS:77955712500
SN - 1536-1276
VL - 9
SP - 2654
EP - 2663
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 8
M1 - 5494779
ER -