摘要
抑制LTE系统中小区间干扰通常采用软频率复用方案,但它为每个小区固定地分配主载波,频谱分配缺乏有效性和灵活性,适用于小区用户均匀分布情况下的静态干扰协调技术。因此,提出自适应半静态频率协调方案,根据小区间频谱资源优先级自适应地调整每个小区中的主副载波频段,且频率子载波根据小区边缘用户的负载分配。通过MATLAB仿真,得出结果说明所提方案能够有效增强小区边缘用户的性能,同时提高了系统及小区边缘用户的信干噪比和吞吐量。
Soft frequency reuse scheme is usually adopted to suppress the LTE inter-cell interference, small soft frequency reuse scheme, and however its fixed allocation of primary carrier for each cell lacks effectiveness and flexibility of spectrum allocation and is suitable for residential users in technical conditions of evenly distributed static interference coordination. This paper proposes an adaptive semi-static frequency coordination scheme, in which, the primary and subcarrier frequency spectrum of each cell is adaptively regulated in accordance with the priority of inter-cell spectrum resources, and subcarrier frequency allocation is implemented according to the load of cell edge users. MATLAB simulation indicates that the proposed scheme could effectively enhance the performance of cell edge users while improving the system and the SINR and throughput of cell edge users.
出处
《通信技术》
2016年第9期1186-1190,共5页
Communications Technology
