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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.
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Size: 827392 |
Author: 吴大亨 |
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Description: This paper investigates the design of joint frequency
offset and carrier phase estimation of a multi-frequency time division
multiple access (MF-TDMA) demodulator that is applied to
a digital video broadcasting—return channel system via satellite
(DVB-RCS). The proposed joint estimation algorithm is based on
the interpolation technique for two correlation values in the frequency
and phase domains. This simple interpolation technique
can significantly improve frequency and phase resolution capabilities
of the proposed technique without increasing the number of
the correlation values. In addition, the overall block diagram of a
digital communications receiver for DVB-RCS is presented, which
was designed using the proposed estimation algorithms.
Index Terms—Carrier phase estimation, DVB-RCS, frequency
offset estimation, interpolation, joint estimation, MF-TDMA.-This paper investigates the design of joint frequencyoffset and carrier phase estimation of a multi-frequency time divisionmultiple access (MF-TDMA) demodulator that is applied toa digital video broadcasting-return channel system via satellite (DVB-RCS). The proposed joint estimation algorithm is based onthe interpolation technique for two correlation values in the frequencyand phase domains. This simple interpolation techniquecan significantly improve frequency and phase resolution capabilitiesof the proposed technique without increasing the number ofthe correlation values. In addition, the overall block diagram of adigital communications receiver for DVB-RCS is presented, whichwas designed using the proposed estimation algorithms.Index Terms-Carrier phase estimation, DVB-RCS, frequencyoffset estimation, interpolation, joint estimation, MF-TDMA.
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Size: 500736 |
Author: 吴大亨 |
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Description: 数字锁相环，采用costas环的数字形式，实现跟踪载波相位，-Digital phase-locked loop, using the digital form costas loop to achieve carrier phase tracking,
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Size: 1024 |
Author: lily |
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Description: 描述符号定时和载波相位估计突发调制的一种快同步器的实现，对同步感兴趣的朋友是不错的资料-Description of symbol timing and carrier phase estimation of a sudden modulation Synchronizer quick realization of the synchronization of interest to friends is a good information
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Size: 46080 |
Author: Joaquin |
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Description: 通信系统中载波相位恢复所需要用到的程序，用了多种方法实现载波恢复。-Communications system carrier phase recovery procedures are needed, using a variety of methods to achieve carrier recovery.
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Size: 11264 |
Author: 包丹 |
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Description: 介绍了一种基于锁频锁相环(FPLL)的载波跟踪算法。频率跟踪模块可以适应较大动态范围的频率变化，基于软件的数控振荡器(NCO)模块可以达到极高的频率跟踪精度。由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。因此，该基于FPLL的载波跟踪算法可以适应信号存在较大的动态范围和噪声干扰的应用环境；同时，其鉴频鉴相算法表达式简单，易于用可编程数字器件实现。-Introduce an approach based on frequency-locking phase-locked loop (FPLL) carrier tracking algorithm. Frequency tracking module can adapt to a larger dynamic range of the frequency change, software-based numerical control oscillator (NCO) module can achieve the very high frequency tracking accuracy. Because of the frequency lock loop traction PLL filter can be designed very narrow, with very good noise suppression performance, to meet the precise requirements of carrier phase tracking. Therefore, the FPLL carrier-based tracking algorithm can be adapted to signal the existence of a larger dynamic range and noise of the application environment at the same time, the PFD algorithm expression is simple, easy to use programmable digital devices.
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Size: 162816 |
Author: 何宁 |
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Description: 基于模糊逻辑控制的数字锁相环，用于通信系统中的载波恢复。Digital phase lock loop base on fuzzy logical control, which is used to recover carrier in communication system.-Based on fuzzy logic control of digital phase-locked loop for the communication system in carrier recovery. Digital phase lock loop base on fuzzy logical control, which is used to recover carrier in communication system.
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Size: 33792 |
Author: gogomx |
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Description: 基于载波相位三差的航天器GPS/INS组合姿态算法-Based on carrier phase III spacecraft poor GPS/INS Attitude Algorithm portfolio
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Size: 765952 |
Author: 陳翔 |
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Description: 利用gps多天线载波相位技术，确定姿态软件。-The use of multi-antenna gps carrier phase technology, attitude determination software.
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Size: 662528 |
Author: yanrui geng |
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Description: 加入载波相位偏差，用最大似然估计和错误估计估计相位误差，并进行比较。-Add carrier phase deviation, using maximum likelihood estimation and errors estimated phase error is estimated and compared.
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Size: 1024 |
Author: rachel |
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Description: 包括载波跟踪和伪码相位跟踪，用Matlab实现直接序列扩频信号的跟踪程序。-Including pseudo-code tracking and carrier phase tracking using Matlab implementation of direct sequence spread spectrum signal tracking procedures.
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Size: 16384 |
Author: 杜宇 |
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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
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Size: 956416 |
Author: zhangxiaoyu |
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Description: 载波相位三差处理，用fortran语言编写的，对研究GPS载波相位差分的人有所帮助。-Three difference carrier phase processing, using the fortran language, the study of GPS carrier phase difference be helpful to people.
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Size: 23552 |
Author: 杨春 |
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Description: 经典的全球定位系统载波相位整周模糊度固定算法详细描述-Classic Global Positioning System carrier phase ambiguity resolution algorithm for a detailed description of the fixed
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Size: 169984 |
Author: ligc2009 |
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Description: 非常好的GPS基础技术文档，从伪距测量到载波相位，载到整周模糊度，相信会有收获的。-A very good GPS-based technical documentation, from the pseudo-range measurements to the carrier phase, containing the ambiguity, I believe there will be harvested.
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Size: 5243904 |
Author: rssfc |
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Description: 载波相位观测值的周跳探测与修复与程序设计，通过多项式拟合法进行探测与修复的工作。-Carrier phase observations of cycle slip detection and repair and programming, through the polynomial fitting, detection and repair work.
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Size: 1024 |
Author: 燕浩伟 |
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Description: 鉴于载波相位观测量可提供高精度定位信息的特点,分析了在高动态环境获得载波相位观测量的三种可
能方法,对三种方法的估计精度和动态跟踪能力进行了比较. 提出了一种适合GPS 系统的高动态环境载波相位
测量方案.-View of the carrier phase measurements can provide accurate location information, analyzes the dynamic environment in the high carrier phase measurements to obtain three possible methods, three methods of estimation accuracy and dynamic tracking ability was compared. Presents a GPS system for high dynamic carrier phase measurement program.
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Size: 267264 |
Author: herui |
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Description: 一篇基于似然函数的盲载波恢复的国外论文，值得一看-An EM Approach to Carrier Phase Recovery in AWGN Channel
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Size: 457728 |
Author: haodiangei |
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Description: 针对可能出现的伪距突发错误及载波周跳的问题，研究一种应用于低动态区域实时定位系统的鲁棒载波相
位平滑伪距算法。仿真结果表明，方法可以在一定程度上减小由于伪距突发错误与周跳所引起的测距误差，进而提高定位
精度。-Considering the burst error of pseudo range and carrier cycle slip，a robust carrier phase smoothed pseudo range al-
gorithm is developed for the low dynamic system．Simulation results reveal that with the proposed algorithm the error caused by burst
error of pseudo range and carrier cycle slip is reduced and the location precision is improved．
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Size: 154624 |
Author: wangmingxiao |
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Description: GPS 利用载波相位定位的时候如果存在多经情况的分析和处理-if exist multipath how to use carrier phase to poistion in GPS
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Size: 145408 |
Author: wang |
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