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通过分析8PSK 调制方式的载波恢复、定时恢复算法, 提出了一种适用于新一代数字卫星电视标准DVB S2
的全数字解调算法, 改进了相位频率检测( PFD) 算法以适合于8PSK 解调. 载波恢复采用频率检测( FD) 和相位频率
检测相结合的结构, 跟踪范围超过1 倍符号率. 采用Gardner TED 算法进行定时恢复.-By analyzing the 8PSK modulation carrier recovery, timing recovery algori
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In this paper, a novel demodulation structure in
high-frequency (HF) channel is introduced and studied.Frequency-offset estimation, ractionally spaced adaptive equalization and carrier recovery techniques are involved.Frequency-offset correction is
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摘 要:定时恢复是数字接收机中的关键技术,基于某特定LEO低轨卫星通信系统应用,重点研究了异步时钟采
样恢复法的工作原理,提出了一种改进的Gardner定时误差检测算法,给出了整个定时环路的具体实现方案,并针对其
性能进行了分析。仿真结果表明,在大多普勒加速度的卫星信道环境下,该方案能够满足系统设计的要求,且实现结
构简单、优化,可大幅降低算法复杂度,在较高信噪比的情况下,具有更加优化的性能。
-Abstract: The timing recovery is a key tec
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This work is aiming to study and control of drive train of an electric vehicle based on doubly fed induction
machine (DFIM), the power structure of this machine and the control strategy applied allow operating over a wide
range of speed variation
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NTFS 文件系统结构说明，有利于文件彻底清除和数据恢复-NTFS file system structure descr iption file is conducive to the elimination and data recovery
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