Cross-layer Optimization for Multiuser Downlink Transmission Based on FDD-OFDMA Systems
-
摘要: 该文针对FDD-OFDMA移动通信下行系统受限干扰的问题，提出了一种资源调度跨层设计方法。所提方法在满足目标误包率的前提下，以最大化系统goodput(发射端成功发射的比特率)为准则建立优化模型，能在发射端完全不知道信道状态信息(CSI)的情况下，利用反馈的确认/否定确认(ACK/NAK)信息实现用户调度以及速率分配的优化。仿真结果表明，所提算法在较低复杂度前提下获得很接近发射端完全已知信道状态信息的系统goodput。Abstract: A resource scheduling cross-layer design scheme in FDD-OFDMA mobile communication downlink system about the issue of limited interference is proposed. A mathematical formulation of optimization issue is provided with the objective of maximizing system goodput under target Packet Error Rate (PER) constraint. The proposed method can use ACK/NAK feedback information to implement user selection and rate allocation without Channel State Information (CSI) at the base station. Simulation results demonstrate that the system goodput of proposed algorithms is close to the condition of with channel state information at the base station, it also has low complexity.
-
Key words:
- Wireless communication /
- Frequency Division Duplex (FDD) /
- OFDMA /
- Resource scheduling /
- Downlink system
-
计量
- 文章访问数: 2479
- HTML全文浏览量: 86
- PDF下载量: 562
- 被引次数: 0
下载:
