摘要
针对多用户OFDM(Orthogonal Frequency Division Multiplexing)认知无线电系统模型,提出一种基于避免干扰的分组频谱分配算法,并对所提模型对应帧结构中的频谱感知、频谱聚合等核心技术进行详细的功能设计。通过对不同用户频带资源需求的综合判断,并结合当前频谱空洞情况的判决结果,在避免对授权用户造成干扰的前提下,应用所提的分组频谱分配算法进行认知用户间的资源分配。仿真结果验证了所提算法的可行性,且所提出的模型不仅可以合理地利用频谱空洞资源,其误码率及误包率均更好地满足了用户的需求。
For multi-user orthogonal frequency division multiplexing（ OFDM） cognitive radio system model,we propose an interference avoidance-based grouping spectrum allocation algorithm,and make the detailed functional design in regard to the core technologies of spectrum sensing and spectrum aggregation in the corresponding frame structure of the proposed model. According to the comprehensive estimation on the bandwidth resource demands of different users and combining the judgment result of current spectrum holes,we allocate the spectrum resources among cognitive users by applying the proposed grouping spectrum allocation algorithm on the premise of no interference to authorised users. Simulation results verify the feasibility of the proposed algorithm,the system model presented can use the spectrum holes resource reasonably,and its bit error rate and packet error rate are all met user＇s requirements better.
出处
《计算机应用与软件》
CSCD
2015年第3期119-123,共5页
Computer Applications and Software
基金
河北省自然科学基金项目(FN201202046)
河北省教育厅科学技术处项目(ZH2011222)
