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: 掌握梳状导频和信道估计算法，实现MATLAB仿真；建立简单的系统结构和信道模型；在含多普勒频移的瑞利衰落信道下，进行含信道估计算法的OFDM系统仿真，并进行性能分析。
-Comb master and pilot channel estimation algorithm, the realization of MATLAB simulation the establishment of a simple system structure and channel model with Doppler frequency shift in the Rayleigh fading channel, the channel estimation algorithm with the OFDM system simulation and performance analysis. Platform: |
Size: 10240 |
Author:林杉 |
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Description: The function applies the Madsen method for Doppler Centroid estimation. The input are:
1) the raw data, the parameter of the distance between samples in azimuth to be correlated and the PRF (Pulse repetition frequency) Platform: |
Size: 1024 |
Author:rotor |
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Description: This file contains a matlab file for blind carrier estimation which compute the phase and frequency offset of carrier due to Doppler shift. Platform: |
Size: 1024 |
Author:Abbas |
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Description: 从回波中估计多普勒参数是合成孔径雷达运动补偿的关键。文中研究了多目标回波对参数估计的影响，从理论上推导了估计多普勒中心和调频率对回波的不同要求，并用两个指标举例分析了一段实测机载SAR数据，给出了实际应用中参数估计时选择回波的原则。-Doppler parameters estimation from radar echoes is a key step in SAR(Synthetic Aperture Radar}motion cornpensation．
This paper researched the efect of multiple targets echoes to estimate parameters and deducted theoretically the different
requirement for echoes in estimating doppler centroid and doppler frequency modulation rate．Th en giving a real airborne SAR echo
as example，we analyzed it with two measurements and concluded the principle about choosing echoes in practice． Platform: |
Size: 187392 |
Author:nico |
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Description: OFDM水声通信中最大多普勒频偏估计算法研究-OFDM underwater acoustic communication in the largest Doppler shift estimation algorithm Platform: |
Size: 692224 |
Author:王凯 |
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Description: 对ofdm系统进行信道估计，特别是对时变信道，受多径和多普勒影响严重的系统，算法收敛性很好-Ofdm system for channel estimation, especially for time-varying channel, affected by severe multipath and Doppler system is very good convergence Platform: |
Size: 303104 |
Author:施政 |
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Description: 该仿真研究了采用相关器进行多谱勒估计的方法，并研究了多普勒失配对相关器检测性能的影响-The simulation study of the correlator for Doppler estimation method, and studied the influence of the Doppler mismatch detection performance Platform: |
Size: 1024 |
Author:吕丹丹 |
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Description: 提出一种联合循环平稳法与多普勒模糊数搜索法的多分量Chirp信号相位参数精确估计算法，与已有循环平稳算法相比，该算法的相位参数取值范围不受限，低信噪比下的相位参
数估计精度约提高30 dB-Smooth fuzzy numbers and Doppler search method for multi-component the Chirp signal phase parameters the precise estimation algorithm, compared with existing cyclostationary algorithm proposed combined cycle, the phase of the algorithm parameters range is not limited by the low signal-to-noise than under the phase parameter estimation accuracy is improved by about 30 dB Platform: |
Size: 276480 |
Author:forevr |
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Description: 数字通信中的多普勒频偏估计技术研究，采用开环大频偏估计算法，调制是4/pi_DQPSK-Doppler shift estimation in digital communications technology, the use of open-loop large frequency offset estimation algorithms, modulation is 4/pi_DQPSK Platform: |
Size: 2048 |
Author:梁涛 |
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Description: 雷达信号的多普勒补偿问题，对雷达整个的工作过程进行了仿真，多普勒进行了估计和补偿-Doppler radar signal compensation, work on the radar the whole process was simulated Doppler estimation and compensation were Platform: |
Size: 2048 |
Author:gaoanqin |
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Description: 里面有多个多普勒频移估计的高质量文章，不同的温江介绍不等的算法，有几个会有相似之处，在我看来这是非常好的多普勒频移估计的IEEE文章，希望对大家有用！-There are more than the estimated Doppler shift quality paper, different algorithms ranging Wenjiang introduction, there are several similarities, in my opinion this is a very good estimate of the Doppler shift of IEEE article, we hope to useful! Platform: |
Size: 3410944 |
Author:sunjing |
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Description: OFDM信号在无线通信中会受到多普勒频移的影响，从而影响了OFDM信号的正交性，引起载波间的干扰和OFDM信号符号间的干扰，本代码先形成含有N个二进制码元的信号，而这个信号的前半部分和后半部分的信号是一样的，然后根据把这个信号调制成OFDM信号，最后接收端根据这个OFDM信号估计出多普勒因子-OFDM signal in a wireless communication will be subject to Doppler shift of influence, thus affecting the OFDM signal orthogonality, causing interference and interference between the OFDM signal symbol between carriers, the code first formed comprising N binary symbols signal, and the first and second halves of this signal is the same signal, and then the OFDM signal according to the estimated Doppler factor modulates the signal to the OFDM signal received, the last side Platform: |
Size: 8192 |
Author:hero |
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Search - doppler estimation