基于离散频带的中继协作网络频谱聚合算法研究

Research on Spectrum Aggregation in Relay Cooperative Network based on Discrete Bands

随着移动通信的高速发展,传统的连续频谱分配策略已经无法满足当前用户的带宽需要。LTE-A建议采用频谱聚合技术,通过聚合离散的频谱碎片,解决用户对带宽资源的需求,动态地改善频谱效率。针对两跳中继协作通信系统,综合考虑频谱利用率和协作速率双重因素,提出了一种基于离散频带的中继协作网络中的频谱聚合方法。仿真结果表明,与传统的连续分配方法相比,该方法可以大幅度地提高系统吞吐量,改善频谱利用率,从而满足用户日益增长的带宽需求。

With the rapid development of mobile communications,traditional continuous spectrum allocation cannot meet users＇ bandwidth needs.Through aggregating discrete spectrum pieces,spectrum aggregation,which is recommended in LTE-A,can satisfy users＇ bandwidth demands,meanwhile dynamically improve spectrum efficiency.In two-hop relay cooperative system,considering both spectrum efficiency and cooperative rate,a spectrum aggregation algorithm in relay cooperative network based on discrete bands has been put forward.Simulation results show that compared with continuous spectrum allocation strategy,this algorithm can enhance system throughput,improve spectrum efficiency,and consequently satisfies increasing bandwidth needs.