摘要
蜂窝网络空间易受到跨层或同层干扰,从而导致其存在资源分配不均衡的问题。针对该问题,提出一种OFDMA多跳中继蜂窝网络空间复用干扰协调策略。首先建立网络模型,在调节无线链路的基础上,通过资源重用策略和相应的多跳中继下行子帧结构,保证网络的资源利用率。基于此,结合STBC干扰协调策略提高小区边缘编码的分集性能。只有当来自多个小区的信号强度没有显著差异时,才可使用STBC编码。否则,选择信号强度最大的小区为用户提供服务,从而减少由多个天线同时服务而引起的附加干扰。实验结果表明:该策略取得了较好的接收信噪比性能,证明其具有较强的有效性。
Interference between Cross layers or the same layer in cellular network space leads to unbalanced resource allocation. Therefore, we reported an interference coordination strategy for spatial multiplexing of OFDMA multi hop relay cellular networks. The network model was established. Based on the adjustment of wireless link, through the resource reuse strategy and corresponding structure of multi hop relay downlink subframe, the resource utilization of the network was guaranteed. Then, according to STBC interference coordination strategy, the diversity performance of cell edge coding was enhanced. STBC coding was used when there was no significant difference in signal strength from multiple cells. On the contrary, the cell with the largest signal strength was selected to provide services for users, reducing the additional interference caused by multiple antennas serving at the same time. The results show that the strategy has excellent signal-to-noise ratio performance and effectiveness.
作者
杨亚让
赵越
YANG Ya-rang;ZHAO Yue(Coolege of Physics and Electrical Engineering,Kashi University,Kashi Xinjiang 844006,China;Southwest Jiaotong University,Chengdu Sichuan 610031,China)
出处
《计算机仿真》
北大核心
2021年第6期150-153,377,共5页
Computer Simulation
基金
喀什大学重点课题(18)(2625,OFDMA)。
关键词
多跳中继
蜂窝网络
空间复用
干扰协调
边缘编码
Multi hop relay
Cellular network
Space reuse
Interference coordination
Edge coding
