摘要
讨论协作通信的复用增益的优势。首先,给出多天线中继网络之间传输速率和中断概率的基本权衡的新解释;然后讨论协作复用增益获得任何有限SNR的可能。在全双工的中继网络中,中继不仅能提供可靠的链路连接,还能提高更高的频谱效率。结果表明,在分集-复用权衡对任何有限的信噪比值下,复用增益能显著影响系统性能。
Previous work on benefits of such techniques. cooperative communications has concentrated primarily on the diversity This paper, instead, considers the multiplexing benefits of cooperative communications. First, a new interpretation on the fundamental tradeoff between the transmission rate and outage probability in multiple-antenna relay networks is given. It follows that multiplexing gains can be obtained at any finite signal-to-noise ratio (SNR), in full-duplex multiple-antenna relay net- works. Thus, relaying can offer not only stronger link reliability, but also higher spectral efficiency. It is shown that this power gain can significantly affect the system diversity-multiplexing tradeoff for any finite SNR value.
出处
《重庆理工大学学报(自然科学)》
CAS
2011年第12期94-99,105,共7页
Journal of Chongqing University of Technology:Natural Science
基金
云南省科技厅基金资助项目(2009CA027)
关键词
分集增益
复用增益
MIMO通信
协作通信
中继节点
功率
中断概率
SNR
diversity gain
multiplexing gain
MIMO communication
relay nodes
power
coopera-tive communication
outage probability
SNR