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A design method was introd uced to efficiently implement an interpolator by Farrow structure,which can be used in an
all—digital timing recovery scheme.An algorithm was presented to calculate the interpolator coefficients of Farrow structure and min
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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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数字基带信号的传输是数字通信系统的重要组成部分。在数字通信中,有些场合可不经过载波调制和解调过程,而对基带信号进行直接传输。采用AMI码的信号交替反转,有可能出现四连零现象,这不利于接收端的定时信号提取。而HDB3码因其无直流成份、低频成份少和连0个数最多不超过三个等特点,而对定时信号的恢复十分有利,并已成为CCITT协会推荐使用的基带传输码型之一。为此,本文利用VHDL语言对数据传输系统中的HDB3编码器进行了设计。-Digital baseband signal transmission i
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数字基带信号的传输是数字通信系统的重要组成部分。在数字通信中,有些场合可不经过载波调制和解调过程,而对基带信号进行直接传输。采用AMI码的信号交替反转,有可能出现四连零现象,这不利于接收端的定时信号提取。而HDB3码因其无直流成份、低频成份少和连0个数最多不超过三个等特点,而对定时信号的恢复十分有利,并已成为CCITT协会推荐使用的基带传输码型之一。为此,本文利用VHDL语言对数据传输系统中的HDB3编码器进行了设计。
基于达到达到达到的信号发生器的源程序-Digital baseband
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This paper shows the schemes for interpolation filters, loop filters in Gardner model for perform Timing Recovery in Digital Communications
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QPSK全数字接收机PDF,详细介绍了QPSK全数字接收机的构成,环路滤波器、内插器、Gardner定时恢复等部分的详细设计-QPSK digital receiver PDF, details of the composition of QPSK digital receiver, loop filter, interpolator, Gardner Timing Recovery and other parts of the detailed design
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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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a comparative study of nondata-aided symbol timing recovery techniques for digital satellite communications
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a digital timing recovery scheme for tdma digital mobile radio
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设计一个数字跑表,该跑表具有复位,暂停,秒表计时功能,暂停后恢复时,在原来数值基础上继续计数-Design a digital stopwatch, the stopwatch has reset, pause, stop watch timing function, recovery after a pause, continue on the basis of the original value of count
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A timing error detector for Communication systems with simulink.
# Required versions Matlab 5.2.1, Simulink 2.2.1
# File descr iption
1. ti_det1.m (simulink version 5.2.1)
An s-function to be used for timing detector. For detailed i
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Matched filtering and timing recovery in digital receivers 0901Litwin32
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This paper presents the simulation performance of the all-digital symbol timing recovery using the Gardner Timing Error Detector over π/4-DQPSK modulation. The open loop statistics, the S-curve and the normalized timing error variance, were investiga
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Digital realization of timing recovery circuits for digital data transmission are of growing interest, in this paper, we present a new digital algorithm which can be implemented very efficiently also at high data rates.
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本例程为一抢答器;其中主持人操控S12与S13两个按键。选手共六位,分别操控S6--S11中的一个按键。 当主持人按下抢答开始按键S13后,倒计时开始,计时5s。此后最先按下按键的选手号码将显示与数码管上。后来按下的将无显示。若五秒计时结束后,再按下按键也不会显示。若主持人没有按开始键,就有选手抢答,则视为犯规。此时犯规的选手号码将被显示于数码管上(最多显示五位犯规选手 同时,蜂鸣器发出长笛声报警,数码管全亮。而当主持人按下清零键S12后,一切状态均恢复,可以开始新一轮的抢答。-This rou
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High Speed All Digital Symbol Timing Recovery Based on FPGA
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本文设计的数字分接器是由帧同步提取模块、位同步提取模块、帧同步移位和时序信号恢复模块、分路器模块、串/并转换电路模块五部分组成-Digital tapping machine is designed in this paper by the frame synchronization extraction module, a synchronous extraction module, the displacement of frame synchronization and timing si
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Matched filtering and timing recovery in digital receivers
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基于数字滤波平方率的符号定时恢复算法。输入参数:RtfSig过采样的待恢复信号,信号中的N符号总数,dS升采样率,N_T升余弦滚降滤波器系数-A timing recovery algorithm based on the sign of the digital filtering of the square. Input parameters: RtfSig be over-sampled signal recovery, the total number of N-symbol signal
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接收端时间同步环仿真,包括插值滤波器、环路滤波器、GARDNER算法以及数字控制振荡器(Receiver time synchronization loop simulation, including interpolation filter, loop filter, GARDNER algorithm and digital controlled oscillator)
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