期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Use of Delayed Channel Estimation Results in Adaptive Modulation 预览
1
作者 单晓红 王凤英 +1 位作者 郭银景 李谨 《测试科学与仪器:英文版》 CAS 2011年第3期 260-263,共4页
In this paper,potential use of perfect but delayed channel estimates for variable-power discrete-rate adaptive modulation is explored.Research is concentrated on block by block adaptation.At first,a new quantity-TAUD(... In this paper,potential use of perfect but delayed channel estimates for variable-power discrete-rate adaptive modulation is explored.Research is concentrated on block by block adaptation.At first,a new quantity-TAUD(Tolerable Average Use Delay)is defined,it quantifies the performance of an adaptation scheme in tolerating the delay of channel estimates.Then,the research on TAUD shows that the delay tolerating performance declines with the increase in average power,the scheme working with more modulation modes can tolerate a longer delay,and such improvement will be more significant with the increase of average power.Finally,it shows that,as the delay tolerating performance determines the maximum block length,it has a great effect on the maximum spectral efficiency.The criterion for determining the block length appropriate for the target BER is described and a simple method of calculating the maximum block length is presented. 展开更多
关键词 自适应调制 信道估计 延迟 平均功率 潜在用途 调制方式 频谱效率 性能
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部 意见反馈