ID |
原文 |
译文 |
9504 |
但是,由于近地轨道(low earth orbit,LEO)星地链路的大动态特性,传输信号会遭受严重的多普勒效应影响。 |
However, due to low earth orbit (low earth orbit, LEO) star link of large dynamic characteristics, transmission signal will suffer severe doppler effect. |
9505 |
对于宽带OFDM信号而言,多普勒效应的表现形式更为复杂,不再仅仅是频率的偏移。 |
For broadband OFDM signal, the doppler effect of form is more complex, is no longer just the frequency offset. |
9506 |
分析宽带OFDM信号在LEO卫星对地数传链路中所受到的多普勒影响。 |
Analysis in LEO satellite broadband OFDM signal of digital link in the doppler effect. |
9507 |
首先,对卫星数传链路进行数学建模,并且推导出该大动态场景下的OFDM信号模型; |
First of all, to mathematical modeling of satellite data transmission link, and deduces the OFDM signal model under the dynamic scene; |
9508 |
之后,量化分析由于多普勒效应所产生的符号间干扰和载波间干扰。 |
After quantitative analysis due to intersymbol interference generated by the doppler effect and intercarrier interference. |
9509 |
根据理论分析结果,给出OFDM体制在LEO星地数传应用中的设计要求和设计局限。 |
According to the results of theoretical analysis, the OFDM system is given in LEO star in the applications of digital design requirements and design constraints. |
9510 |
针对陀螺寻北仪的限幅系统设计了一种鲁棒近时间最优控制器。 |
Limiter system for gyro north finder found design a robust nearly time optimal controller. |
9511 |
首先将陀螺寻北仪的快速限幅问题转化为时间最优控制问题,然后提出设计一种鲁棒近时间最优控制器来克服理论时间最优控制器的缺陷。 |
Will first gyro north finder found fast limiter problem into a time optimal control problem, and then puts forward a robust nearly time optimal controller is designed to overcome the defects theory time optimal controller. |
9512 |
该控制器结合了传统的bang-bang控制,滑模控制以及一种备份控制。 |
The controller combines the traditional bang - bang control, sliding mode control, and a backup control. |
9513 |
滑模控制器的设计运用时间最优控制的思想并通过Lyapunov稳定性理论推导出控制器参数的选择标准。 |
Sliding mode controller design based on the idea of time optimal control and controller parameters is deduced with Lyapunov stability theory of selection criteria. |