OFDMA系统中小区内干扰避免的自适应资源分配方案  

Adaptive Resource Allocation in OFDMA with Insufficient Guard Interval under Fractional Load

作　　者：刘淑慧[1] 常永宇[1] 崔杰[1] 杨大成[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2009年第6期37-41,共5页Journal of Beijing University of Posts and Telecommunications

摘　　要：正交频分多址接入(OFDMA)系统中,在保护间隔(GI)长度不足和非满载的情况下,提出一种新型的自适应资源分配(ARA)方案.该方案可利用非满载情况下资源分配的灵活性来有效消除由于GI不足引起的小区内符号间干扰和载波间干扰,避免了接收端使用复杂的干扰消除算法.在系统层进行仿真的结果表明,在非满载情况下,新的ARA算法的系统性能比传统的资源分配(CRA)算法有改善,但是在满载的情况下,由于ARA算法失去了灵活性,其性能与CRA算法相同.Under fraction load （FL） and insufficient guard interval （GI）, a novel adaptive resource allocation （ARA） scheme is proposed in the orthogonal frequency division multiple access （OFDMA） system. It utilizes the flexibility of radio resource management to mitigate the inter-symbol interference and inter-carrier interference due to the insufficient GI under FL instead of the complicated inter- ference reduction algorithms at the receiver. System-level simulations show that, the proposed ARA improves system performance than the conventional resource allocation （CRA） under FL, whereas the performance of proposed ARA approaches the CRA under the full load due to the limitation of resource allocation flexibility.

关 键 词：正交频分多址接入 非满载 保护间隔 资源分配 

分 类 号：TN929.53[电子电信—通信与信息系统]