【摘 要】
：
This paper proposes a time-domain clustered transmitter power adaptation scheme for orthogonal frequency division multiplexing (OFDM) system, which can signific
【机 构】
：
Department of Electronic Engineering
论文部分内容阅读
This paper proposes a time-domain clustered transmitter power adaptation scheme for orthogonal frequency division multiplexing (OFDM) system, which can significantly reduce the feedback amount during power adaptation comparison with conventional frequency-domain adaptation schemes. It was found that the cluster size plays an important role on the adaptation performance, especially for the vehicular environment. Simulation results showed that using Lagrange interpolation to obtain an explicit curve of Doppler frequency vs cluster size yields good trade-offbetween the resulted bit error rate (BER) and the amount of feedback.
其他文献
简要论述了作为海水淡化技术之一的反渗透工艺的发展前景,以及保证反渗透工艺长期稳定运行需要考虑的几个方面;
The development prospects of reverse osmosis process as
NY 525-2002及GB/17767.3-2010中规定当钾含量≤2%时,应用火焰光度法.笔者采用原子吸收光谱法测定低含量的钾,在县级检验机构中具有普及性,而且步骤简单、快捷,检验成本低,结
急性肾功能衰竭(ARF)是一组临床综合征,以肾小球滤过率(GFR)骤然减少,含氮代谢产物尿素氮和肌酐积聚为特征.目前尚缺乏诊断ARF的统一标准,一般认为在基础肾功能正常情况下,内
目的:建立人免疫球蛋白中甘氨酸含量测定方法.方法:参考《中国药典》(2010年版),以氢氧化钠滴定液为滴定剂,采用混合指示剂指示终点,建立化学分析方法,并与高效液相色谱法( H
本文结合某污水处理场地下管道改造应用PE管材的工程实例,论述了PE管材的特点,并与钢管进行了比较,论述了PE管材的施工关键点,同时提出施工中应注意的问题,最终得出PE管材非
文章叙述了某钢厂焦化废水的水处理情况,针对其废水的水质特点,及焦化废水回用的水质要求,确认了以反渗透技术为主的水处理技术.
本文以十二烷基硫酸钠为表面活性剂,以正丁醇做助表面活性剂制备微乳液,并以酪氨酸为萃取对象,探讨了pH值对酪氨酸革取率的影响,优化了萃取的工艺条件.
缺水是我国面临的最严重问题之一,我国农业用水占总用水量的80%,农业生产最受干旱缺水的困扰,而占农业用水65%以上的水稻生产更是首当其冲,每年均有因旱灾造成的水稻减产,大
The Yb3+-doped silicate, phosphate and borophosphate laser glasses were prepared by means of conventional melt quenching technology.The physical and spectral pr
今年北京市将启动城市环境精细管理、美化市容活动，提升街巷胡同环境卫生水平成为重点之一。目前，市市政市容委已完成街巷胡同的环境卫生检查考核标准，正在公开征求意见。该标准