Description: Carrier-phase synchronization can be approached in a
general manner by estimating the multiplicative distortion (MD) to which
a baseband received signal in an RF or coherent optical transmission
system is subjected. This paper presents a unified modeling and
estimation of the MD in finite-alphabet digital communication systems. A
simple form of MD is the camer phase exp GO) which has to be estimated
and compensated for in a coherent receiver. A more general case with
fading must, however, allow for amplitude as well as phase variations of
the MD.
We assume a state-variable model for the MD and generally obtain a
nonlinear estimation problem with additional randomly-varying system
parameters such as received signal power, frequency offset, and Doppler
spread. An extended Kalman filter is then applied as a near-optimal
solution to the adaptive MD and channel parameter estimation problem.
Examples are given to show the use and some advantages of this scheme. Platform: |
Size: 827601 |
Author:吴大亨 |
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Description: 由于使用了大量数目的子载波，这就使得多载波系统对多种同步误差都很敏
感。同步误差可分为两大类:载波相位
-due to the use of the large number of subcarriers, which makes multi-carrier systems for a variety of synchronization errors are very sensitive. Synchronization error can be divided into two categories : carrier phase Platform: |
Size: 10240 |
Author:张开 |
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Description: 倒立摆模糊控制程序，基于matlab编写，用于模糊控制仿真-inverted pendulum control procedures, based on Matlab prepared for Fuzzy Control Simulation Platform: |
Size: 1024 |
Author:chenning |
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Description: 程序是毕业论文的研究实验结果，应用于直线二级倒立摆的稳定控制，得到了理想的控制效果。-procedures dissertation research results, for two straight inverted pendulum stability control, be the ideal control effect. Platform: |
Size: 3072 |
Author:gaoxinghua |
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Description: Carrier-phase synchronization can be approached in a
general manner by estimating the multiplicative distortion (MD) to which
a baseband received signal in an RF or coherent optical transmission
system is subjected. This paper presents a unified modeling and
estimation of the MD in finite-alphabet digital communication systems. A
simple form of MD is the camer phase exp GO) which has to be estimated
and compensated for in a coherent receiver. A more general case with
fading must, however, allow for amplitude as well as phase variations of
the MD.
We assume a state-variable model for the MD and generally obtain a
nonlinear estimation problem with additional randomly-varying system
parameters such as received signal power, frequency offset, and Doppler
spread. An extended Kalman filter is then applied as a near-optimal
solution to the adaptive MD and channel parameter estimation problem.
Examples are given to show the use and some advantages of this scheme. Platform: |
Size: 827392 |
Author:吴大亨 |
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Description: 在DAB系统中的频率同步，载频同步，参考一下Carrier frequency offset estimation of DAB receiver based on phase reference symbol-In the DAB system frequency synchronization, carrier frequency synchronization, refer to Carrier frequency offset estimation of DAB receiver based on phase reference symbol Platform: |
Size: 210944 |
Author:Aries |
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Description: 在IEEE - 1588系统中, LXI设备把它们的时钟与一个公共意义上的时间(网络中最精确的时钟)相同步。通过对时钟的同步, LXI仪器
就能在规定时间开始(或停止)测量/激励,同步测量或输出它们的信号,而不需要触发线,并为所有事件和数据加时戳。-In the IEEE- 1588 System, LXI device clock them with a public sense of the time (the network the most accurate clock) phase synchronization. Through the clock synchronization, LXI instruments can be in a specified time start (or stop) measurement/incentive, synchronous measurements or output their signals without the need for the trigger line, and for all the events and data plus timestamp. Platform: |
Size: 345088 |
Author:zhujing |
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Description: 基于Simulink的小车_倒摆模糊自适应控制系统设计与仿真-Simulink based on the car _ inverted pendulum fuzzy adaptive control system design and simulation Platform: |
Size: 206848 |
Author:xiaxia |
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Description: dpll的verilog代码，完成数字锁相。用于时钟对准，位同步。-dpll the verilog code to complete the digital phase-locked. Alignment for the clock, bit synchronization. Platform: |
Size: 1024 |
Author:hsj |
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Description: Abstract-In this paper, simple autonomous chaotic circuits
coupled by resistors are investigated. By carrying out computer
calculations and circuit experiments, irregular self-switching phenomenon
of three spatial patterns characterized by the phase
states of quasi-synchronization of chaos can be observed from
only four simple chaotic circuits. This is the same phenomenon
as chaotic wandering of spatial patterns observed very often from
systems with a large number of degrees of freedom. Namely, one
of spatial-temporal chaos observed from systems of large size can
be also generated in the proposed system consisting of only four
chaotic circuits. A six subcircuits case and a coupled chaotic circuits
networks are also studied, and such systems are confirmed
to produce more complicated spatio-temporal phenomena. Platform: |
Size: 848896 |
Author:wang |
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Description: 同步 载波相位同步的过程是迫使本地振荡器与载波振荡器的使用在发射机在探测器在相位和频率的振荡过程被使用发射机。-carrier phase synchronization is the process of forcing the local oscillators in the detector to oscillate in phase and frequency with the carrier oscillator used at the transmitter Platform: |
Size: 956416 |
Author:zhangxiaoyu |
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Description: 锁相环是一种反馈电路，其作用是使得电路上的时钟和某一外部时钟的相位同步。PLL通过比较外部信号的相位和由压控晶振（VCXO）的相位来实现同步的，在比较的过程中，锁相环电路会不断根据外部信号的相位来调整本地晶振的时钟相位，直到两个信号的相位同步。-PLL is a feedback circuit, and its role is to make the clock circuit and a phase of external clock synchronization. PLL signal by comparing the external voltage-controlled crystal phase and the (VCXO) to achieve synchronization phase, in comparison, the phase-locked loop circuit will continue in accordance with external signals of local oscillator phase to adjust the clock phase, until Phase synchronization of two signals. Platform: |
Size: 141312 |
Author:liusen |
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Description: this code is simulation of dm synchronization with poly phase sequences with good auto correlation sequences that proposed in 2004 by ieee in ieee 802.16 standard(wimax down link)-this code is simulation of ofdm synchronization with poly phase sequences with good auto correlation sequences that proposed in 2004 by ieee in ieee 802.16 standard(wimax down link) Platform: |
Size: 1024 |
Author:amin |
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Description: this the phase locked loops post processer.PLLs are widely used in frequency synthesis, for frequency multipliers and dividers, for carrier and symbol synchronization, and in the implementation of coherent receivers-this is the phase locked loops post processer.PLLs are widely used in frequency synthesis, for frequency multipliers and dividers, for carrier and symbol synchronization, and in the implementation of coherent receivers Platform: |
Size: 1024 |
Author:nidhi |
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Description: 采用AFC技术来锁定频，采用Garden技术进行定时恢复，采用Costas环进行相位的锁定-Use technology to lock the frequency of AFC, using Garden timing recovery techniques using Costas loop for phase locking Platform: |
Size: 3072 |
Author:caomin |
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Description: 在电网电压频率波动或者三相不平衡的情况下,硬件锁相很难准确检测到基波正序的相位。在结合PWM整流器空间矢量解耦控制算法的基础上,将软件锁相环技术应用在PWM整流器控制系统中,并用仿真和实验验证了该方案的可行性。实验结果表明,该方案解决了电网电压频率波动及三相不平衡时的相位同步等问题,并在工程上具有一定参考价值。-Frequency or voltage fluctuations in three-phase unbalanced case, the hardware lock is difficult to accurately detect the fundamental positive sequence phase. In the space vector PWM rectifier with decoupling control algorithm based on the software used in the PWM rectifier PLL control system, and use simulation and experimental verification of the feasibility. Experimental results show that the solutions to address the voltage and frequency fluctuations of the phase unbalanced three-phase synchronization issues, and the project has a certain reference value. Platform: |
Size: 121856 |
Author:ren |
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Description: 一种基于软信息的编码辅助的迭代相位估计算法。该法采用载波相位同步、解调和译码联合处理的思想，将译码器输出的码比特的可靠量度直接反馈回估计单元以提高同步的准确度-Based on soft information encoded auxiliary iterative phase estimation algorithm. The method uses carrier phase synchronization, demodulation and decoding process of joint thinking, the decoder output bits of code back to a reliable measure of estimated unit direct feedback to improve the accuracy of synchronization Platform: |
Size: 221184 |
Author:fy |
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Description: ：基于脑电信号的身份识别是通过采集试验者的脑部信号来进行身份认证。对于同一个外部刺激或者主体在思考同一个
事件的时候，不同人的大脑所产生的认知脑电信号不同。选取与运动意识想象有关的电极后，分析不同个体在特定状况下脑
电的个体差异，采用以回归系数、能量谱密度、相同步、线性复杂度多种信号处理结合方法对运动想象脑电信号进行处理来
进行特征提取。组合多元特征向量并运用多层BP 神经网络对不同个体的脑电信号进行分类，并在不同的意识想象及不同数
据长度、不同的波段对试验者进行识别率验证分析。结果表明，不同运动想象的平均识别率均在80 以上，其中以想象舌头
运动的识别率较高，达到90.6 ，不同波段的识别率也表明意识想象的模式及相应波段对身份认别有较大的影响。-EEG-based identification to authenticate through the acquisition of experimental brain signals. For the same external stimuli, or the main thinking of the same
Event, different people s brains produced by cognitive EEG. Select imagine the electrodes and movement awareness, analysis of different individuals in a particular situation brain
Individual differences in electricity, the use of regression coefficients, the energy spectral density, phase synchronization, the linear complexity of a variety of signal processing combined with motor imagery EEG
For feature extraction. The combination of multiple feature vectors and the use of multi-layer BP neural network to classify the EEG signals of different individuals, and in a different sense of imagination and a different number of
Length, the band on the test to verify the analysis of the recognition rate. The results show that the average recognition rates of different motor imagery in more than 80 , which to imagine the tongue
The m Platform: |
Size: 551936 |
Author:王闯杰 |
Hits:
Search - phase synchronization