Abstract: Traditional adaptive SC-FDE bears a major drawback of excessively high feedback rate. This paper tackles the problem by proposing a FR-ASC-FDE scheme which is derived from a CR-ASC-FDE model. Specifically, a normalized feedback factor criterion, which is responsible to determine the interval of PCSI feedback, is obtained, and accordingly, appropriate FR-ASC-FDE PCSI feedback patterns are designed with respect to different metropolitan environments. Simulations show that the proposed FR-ASC-FDE scheme dramatically reduces PCSI feedback rate under various fading speed of dual-selective channel environments, while still consistently keeps excellent BER performance.

Key words: SC-FDE, PCSI, dual-selective channel, correlation time, AR(1)

摘要： 针对自适应单载波频域均衡的部分信道状态信息( PCSI) 反馈速率过大问题, 基于恒定速率自适应单载波频域均衡模型, 提出一种降低 PCSI 反馈速率的自适应单载波频域均衡( FR-ASC-FDE) 方案, 得到了确定 PCSI 反馈间隔的归一化反馈因子判据, 并针对不同城市应用环境给出了该方案的PCSI反馈设计。研究和仿真表明, 所提出的FR-ASC-FDE 在保证 良好的误比特性能前提下, 针对不同衰落速度的双选信道环境, 均显著降低了PCSI反馈速率。

关键词: 单载波频域均衡, 部分信道状态信息, 双选信道, 相关时间, 一阶自回归