Cooperative multiple access channels: Achievable rates and optimal resource allocation |
| |
Authors: | ChengKang Pan YueMing Cai YouYun Xu |
| |
Affiliation: | (1) Institute of Communications Engineering, PLA University of Science and Technology, Nanjing, 210007, China |
| |
Abstract: | We investigate the multiple access channels (MAC) where sources can cooperate via half-duplex relaying and refer to it as
cooperative MAC channels (CMAC). Assuming perfect channel state information (CSI) at the transmitters and the receivers, we
determine the bounds on the achievable rate region of a Gaussian CMAC channel and an inner bound on the outage capacity region
of a fading CMAC channel. Based on superposition modulation, a half-duplex cooperative relay scheme with optimal resource
allocation is proposed to achieve the bounds of capacity region. Analytical results and simulation results show that the achievable
rate region of a Gaussian CMAC channel is larger than that of a Gaussian MAC channel with direct transmission (DT) schemes.
But they have the same achievable sum rate. Moreover, the proposed scheme can provide higher outage capacity region than DT
schemes in a fading MAC channel due to the fact that sources can share the resources with each other to reduce outages.
Supported partially by the National Natural Science Foundation of China (Grant No. 60672079), the Natural Science Foundation
of Jiangsu Province (Grant No. BK2006701), and the Natinoal High-Tech Research & Development Program of China (Grant No. 2007AA01Z267) |
| |
Keywords: | multiple access channel cooperative communication rate region resource allocation |
本文献已被 CNKI 维普 SpringerLink 等数据库收录! |
|