1) preamble
[英][pri'æmbl] [美][prɪ'æmbḷ]
前导
1.
Based on analyzing OFDM signal models in the presence of carrier frequency offset, the mixed structural algorithms of carrier frequency synchronization using OFDM preamble symbol are presented.
在分析载波频偏OFDM系统信号模型基础上,提出了基于前导符号循环前缀相关和前导符号相关的混合结构载波同步的算法,将基于循环前缀相关的方法和前导符号相关的方法融合,从链路级研究了易于实现的载波同步算法,在高速无线多径Rayleigh信道下,车速120km/h时,比较了两种不同的载波同步算法仿真结果。
2.
The method avoided some defeat which occurred in Schmidl’s and Minn’s timing offset estimation method by a kind of new preamble.
本同步方法采用了一种新的前导,可以避免Schmidl和Minn方法的不足,通过计算机仿真比较了三种方法的定时估计的均值和标准方差,结果表明文中算法的定时估计的均值与实际值一致,标准方差非常小。
3.
Based on analyzing MIMO-OFDM systems signal model in the presence of carrier frequency offset,the spatial diversity algorithms of carrier frequency synchronization using one OFDM preamble symbol correlation is presented.
在分析MIMO-OFDM系统载波频偏信号模型基础上,提出了基于单个OFDM前导子符号相关的MIMO-OFDM载波同步的空间分集算法,从链路级研究了易于实现的MIMO-OFDM系统载波同步算法,在无线多径Rayleigh信道COST207模型下,车速分别为10km/h和120km/h时,给出了MIMO-OFDM系统载波同步分集算法的仿真结果。
2) advance timing
导前
3) leader
[英]['li:də(r)] [美]['lidɚ]
前导区，前导序列
4) conductor
[英][kən'dʌktə(r)] [美][kən'dʌktɚ]
导体;前导子
5) Fore and End Channel
前后导槽
6) precordial leads
胸前导联
1.
Objective To study the short-period prognostic effect of gerontal patients with acute inferior wall myocardial infarction with depressed precordial leads ST segement.
结论胸前导联ST段压低的急性下壁心梗病人预后不良。
补充资料：前导
1.引导;引路。 2.引路的人;向导。 3.我国古代官吏出行时前列的仪仗。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条