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Description: 定时恢复仿真程序，可以解决定时不准确造成的定时错误-timing recovery simulation program can solve the timing of inaccurate timing error
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Size: 27418 |
Author: 张开 |
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Description: squaring timing error comunition fan sir tong xinfangzhen
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Size: 2094 |
Author: FHK |
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Description: 定时恢复仿真程序，可以解决定时不准确造成的定时错误-timing recovery simulation program can solve the timing of inaccurate timing error
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Size: 26624 |
Author: 张开 |
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Description: 有关信号的调制，解扩解调的主要的时间同步方面的程序
-On the signal modulation, demodulation despreading the main time synchronization procedures
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Size: 6675456 |
Author: 飞天 |
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Description: squaring timing error comunition fan sir tong xinfangzhen
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Size: 2048 |
Author: FHK |
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Description: 定时同步是UWB通信系统中至关重要的问题，定时偏差和抖动将严重影响接收机性能。一般定时同步分为捕获和跟踪两个阶段。在捕获阶段，要求接收机快速搜索信号到达时间，并根据搜索结果调整接收机定时.-Timing Synchronization UWB communication systems is of vital importance to the issue, timing error and jitter will seriously affect the receiver performance. Timing Synchronization generally divided into two stages to capture and track. In the capture stage, the request receiver Quick Search signal arrival time, and adjust search results according to the receiver from time to time.
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Size: 2048 |
Author: 王洁 |
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Description: 定时恢复的matbal仿真代码.适合于仿真和误码并对-Timing recovery matbal simulation code. Suitable for simulation and error and
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Size: 21504 |
Author: zhengx |
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Description: 精确定时是针对晶体误差引起的走时不准而设计的程序。测量出的误差完全用程序修正。-Precise timing error is caused by crystals are not allowed to leave the design process. Measured using the procedure to amend the error entirely.
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Size: 3072 |
Author: HuangMingShan |
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Description: QPSK modulation system with recover loops-This is a model of a QPSK modulation system for transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC fi lters with excess bandwidth α = 0.18 are employed. The receiver includes an NDA timing recovery loop followed by a DD phase recovery loop. The transmitter?s symbol period is T and set to a value of 100 ms. The symbol period at the receiver is Tr. The model will produce six windows: Two constellation plots and two eye diagrams (for the real part only), at the output of the matched fi lters and after the recovery loops a plot of the phase error (output of the NCO) and a plot of the fractional timing error (used in the interpolator). The frequency off set at the receiver is denoted by deltaf. The model simulates the transmission of 8000 QPSK symbols.
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Size: 15360 |
Author: ranbowang |
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Description: 用于接收机的定时误差检测的Gardner算法的Simulink仿真，附有Word说明-Receiver for the Gardner timing error detection algorithm for the Simulink simulation, with Word Help
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Size: 21504 |
Author: 晏子 |
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Description: 在这篇论文中，我们提出一种新的时间偏移估计方法应用于OFDM系统。这里提出的估计是为了避免发生在Schmidl中的时间偏移估计方法中的歧义。通过仿真，所提出方案中的性能以均值和最小均方误差的形式说明。仿真结果表明：它与其它估计器相比在相当大的程度上有更小的均方误差。-In this paper, we propose a new time offset estimation method is applied to OFDM systems. Estimates presented here took place in order to avoid the time Schmidl offset estimation method of ambiguity. Through the simulation, the proposed program of performance to the mean and minimum mean square error of the form. The simulation results show that: it is estimated that compared with the other to a large extent there is a smaller mean square error.
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Size: 91136 |
Author: hehe |
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Description: 本程序研究了在不同符号序列条件下，基本Gardner算法和一种修正Gardner算法的定时误差特性-This program studied the sequence of symbols in different conditions, the basic Gardner algorithm and a modified Gardner timing error characteristics of the algorithm
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Size: 1024 |
Author: 鲁信 |
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Description: 接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。-Receiver used algorithms and program flow with the sender sends the frame structure of OFDM symbols are. Concrete frame structure and timing estimates, frequency offset estimation, the remaining error tracking algorithm can reference algorithm documentation.
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Size: 406528 |
Author: keven |
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Description: 1T51单片机实现精确数字钟 因为普通单片机内核是12T 这里采用1T51内核的使得定时误差变得极小，同时加入补偿函数可以说定时已经达到理想精度-1T51 SCM accurate digital clock for the general microcontroller core is used here 1T51 core 12T makes timing error becomes minimal, while adding compensation function can be said to have been from time to time to achieve the desired accuracy
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Size: 140288 |
Author: yushuihua |
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Description: 定时误差估计，精度很高，算法简单易于实现，很值得参考！-Timing error estimates, precision is high, the algorithm simple and easy to implement, it is worth considering!
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Size: 3445760 |
Author: 王哥 |
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Description: 分析了LTE系统频率偏移，定时误差，信道估计问题等，并对广义Rake接收机和CPEDS接收机的性能做了比较。-Analysis of the LTE system frequency offset, timing error, channel estimation problems, and generalized Rake receiver performance receiver and CPEDS were compared.
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Size: 4240384 |
Author: penglu |
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Description: 一种短波高速QAM信号快速无抖动码元同步方案的设计,文章基于Gardner定时误差检测算法、预滤波和一阶过零检测锁相环理论,结合卡尔曼
滤波算法,设计了一种快速无抖动的短波高速QAM信号全数字解调码元同步方案,从理论上
推导了方案中各个参数的设置方法,并在不同的信道环境下测试算法的性能,仿真结果显示
该方案具有优良的性能。
-A short high-speed QAM signal symbol timing quickly without jitter in the design, the article based on Gardner timing error detection algorithm, pre-filter and the first zero-crossing detection of phase-locked loop theory, Kalman filtering algorithm, a fast no-jitter design short-wave high-speed digital QAM signal demodulation symbol synchronization scheme, the program derived from the theory, each parameter setting methods, and the environment in different channels to test the algorithm performance, simulation results show that the scheme has excellent performance.
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Size: 191488 |
Author: longx |
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Description: 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 technology in the digital receiver, based on a particular application of LEO LEO satellite communication system, focus on the asynchronous sampling clock recovery method works, a modified Gardner timing error detection algorithm, given a concrete realization of the regular loop programs, and analyzed for its performance. Simulation results show that the acceleration of the satellite channels in large Doppler environment, the program can meet the requirements of system design and realization of simple structure, optimization, can significantly reduce the complexity of the algorithm, in the case of high SNR, with more optimized performance.
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Size: 407552 |
Author: longx |
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Description: 在CAN总线中,位定时有一点小错误就会导致总线性能严重下降。虽然在许多情况下，位同步会修补由于位定时设置不当而产生的错误，但不能完全避免出错情况，并且在遇到两个或多个CAN节点同时发送的情况时，错误的采样点会使节点启动错误认可标志，使节点不能赢得总线上的任何活动。因此要分析、解决这样的错误就需要对CAN总线位定时中的位同步和CAN节点的工作过程有一个深入的了解。本文描述了CAN总线位同步的运行规则以及如何对位定时的参数进行设置。-In the CAN bus, there is a little bit timing errors will lead to a serious decline in bus performance. Although in many cases, bit synchronization bit timer settings will fix improper because of errors, but can not completely avoid error conditions, and in the event of two or more CAN nodes simultaneously send the case, the error of the sampling points will node startup error recognition signs, so that nodes can not win any activity on the bus. Therefore, to analyze and solve this error you need for the CAN bus bit timing and bit synchronization in CAN nodes have a working understanding of the process. This paper describes the operation of the CAN bus bit synchronization bit timing rules and how to set the parameters.
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Size: 28672 |
Author: 陈晓楠 |
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Description: QPSK平方律定时同步算法实现定时误差和定时恢复-QPSK square timing synchronization algorithm ，estimate timing error and timing error correction
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Size: 2048 |
Author: 胡冰 |
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