节点接收数目受限的多跳分集方法

Multihop diversity scheme with node receiving number restriction

在无线网络中,多跳分集可实现协作分集以提高通信性能。然而在实际无线网络中,多跳分集中存在节点接收数目受限的情况。该文首先考虑在N跳的多跳分集中的各节点只接收其前m跳数据(m<N)的情况,并称之为M(N,m),之后进一步限制M(N,m)的中间节点接收数目为至多p或p+1(p<m),并称之为M(N,m,p)。分析比较了M(N,m)和M(N,m,p)在高信噪比的中断概率。理论和仿真结果表明,与M(N,m)方法相比,尽管M(N,m,p)的中间节点接收数目进一步受限,但在某些情况下,M(N,m,p)仍能接近M(N,m)的性能。

In the wireless network,multihop diversity scheme can implement the cooperative diversity to improve the communication performance.In practice,the receiving number of a node in the multihop diversity is usually restricted.This paper first considers the multihop diversity in the N hop procedure when each node only receives the data from its previous m nodes（m≤N）,which is named as M（N,m）.The receiving number of the intermediate nodes in M（N,m） is further restricted（at most p or p＋1,pm）,and the scheme at this point is named as M（N,m,p）.The outage probabilities of M（N,m） and M（N,m,p） in the high SNR regime were obtained and compared.Theoretical analyses and simulation results confirm that the performance of M（N,m,p） is comparable with that of the M（N,m） in some cases,though the receiving number of the intermediate nodes in M（N,m,p） is further restricted than that in M（N,m）.