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在正交频分多址(OFDMA)系统中,采用家庭基站技术会增加干扰,而且不再适用于传统容量模型.为此,对OFDMA系统的家庭基站和宏基站间的干扰进行了分析,理论推导了异频和同频资源分配时的家庭基站和宏基站共存时的上行链路信噪比分布,并给出了中断概率的闭式解及其相应的吞吐量公式.分析和仿真结果表明,同频资源分配虽然干扰较大,但系统的频谱效率较高,可通过合理的干扰抑制,有效提高家庭基站和宏基站共存时网络的整体性能.
In Orthogonal Frequency Division Multiple Access (OFDMA) system, the use of home base station technology will increase the interference, and is no longer suitable for the traditional capacity model.To this end, OFDMA system home base station and macro base station interference analysis, theory The SNR distribution of the home base station and the macro base station co-existing when the inter-frequency and intra-frequency resource allocation are derived, and the closed-form solution of the interception probability and the corresponding throughput formula are given. The analysis and simulation results show Although the interference of the same-frequency resource is relatively large, the system has high spectrum efficiency and can effectively improve the overall network performance when the home base station and the macro base station coexist through reasonable interference suppression.