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. Platform: |
Size: 501216 |
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. Platform: |
Size: 500736 |
Author:吴大亨 |
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Description: 讨论了利用GPS多普勒频移观测值确定运动载体速度的基本原理,估计了这一方法可以达到的精
度。为验证该方法的可靠性及稳定性,做了两个试验:静态试验和动态试验,试验中实测动态数据处理采用
VAES软件。理论研究和数据处理结果均表明,在卫星分布较好的情况下,载体速度的确定精度可达mm/s。
-Discussed the use of GPS Doppler shift observations to determine the speed of movement of the basic principles of vector, it is estimated that this method can achieve accuracy. To verify the method of reliability and stability, to do two tests: the static tests and dynamic tests, tests using the measured dynamic data-processing software VAES. Theoretical research and data-processing results show that the satellite distribution of better circumstances, the carrier rate of up to determine the accuracy of mm/s. Platform: |
Size: 49152 |
Author:hunt |
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Description: 设计卫星信道条件下，用于调制方式识别的载频和带宽识别算法。-Satellite channels under the conditions of the design for the identification of modulation carrier frequency and bandwidth of the recognition algorithm. Platform: |
Size: 1024 |
Author:王立 |
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Description: 本程序仿真一个从卫星到区域数据中心的下行链路（由一组6个载波构成），评估热噪声，交调（IM）失真、由滤波器造成的码间干扰（ISI）以及邻频干扰对下行链路性能的影响。-This procedure simulation of a regional data from the satellite downlink center (by a group of six carrier constituted) to assess the thermal noise, Intermodulation (IM) distortion, caused by the filter inter-symbol interference (ISI) and interference邻频on the downlink performance. Platform: |
Size: 88064 |
Author:三明 |
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Description: 模拟卫星与地面站之间的通信，使用socket进行网络编程，客户端与服务器为同一载体，界面简洁，有很高的实用性-Simulation between the satellite and earth station communications, the use of network socket programming, client and server for the same carrier, the interface is simple and has high practical Platform: |
Size: 5074944 |
Author:zhouf |
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Description: 包含非线性卫星转发器的FDM系统的仿真
仿真一个从卫星到区域数据中心的下行链路（由一组6个载波构成），评估热噪声，交调（IM）失真、由滤波器造成的码间干扰（ISI）以及邻频干扰对下行链路性能的影响。
-Contains the non-linear satellite transponder FDM system simulation simulation of a regional data centers from the satellite to the downlink (from a group of six carrier composition) to assess the thermal noise, intermodulation (IM) distortion, caused by the filter inter-symbol interference (ISI) and adjacent channel interference on the downlink performance. Platform: |
Size: 5120 |
Author:张燕燕 |
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Description: 仿真一个从卫星到区域数据中心的下行链路（由一组6个载波构成），评估热噪声，交调（IM）失真、由滤波器引起的码间干扰（ISI）以及临频干扰对下行链路性能的影响。-Simulation of a regional data center from the satellite to the downlink (from a group of six carrier composition) to assess the thermal noise, intermodulation (IM) distortion, caused by the filter ISI (ISI) and adjacent channel interference on the downlink link performance. Platform: |
Size: 10240 |
Author:高志敏 |
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Description: 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 algorithm is proposed for a new generation of digital television standard DVB S2 Satellite all-digital demodulation algorithm, improved phase-frequency detector (PFD) algorithm for 8PSK demodulation . carrier recovery using frequency detection (FD) and phase-frequency detector combined structure, tracking more than 100 times the symbol rate range. using Gardner TED algorithm timing recovery. Platform: |
Size: 199680 |
Author:赵亮 |
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Description: GPS卫星 L1波段的simulink仿真模型
包括CA码 载波 噪声 以及可以运行成功-GPS satellite L1 band Simulink simulation modelIncluding CA code carrier to noise and can run successfully Platform: |
Size: 9216 |
Author:小小 |
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Description: ISE12.3环境下编写的载波NCO的产生程序，进行扩频通信或者卫星导航研究的同学可以参考-ISE12.3 environment prepared by the carrier NCO generator, spread spectrum communication or satellite navigation research students can refer Platform: |
Size: 81920 |
Author:枫桥夜泊 |
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Description: 运用双频伪码/载波相位组合方式求解整周模糊度的方法实现星间链路中的载波相位测距。在双频伪码/载
波相位组合原理的基础上，对不同组合方式下的测量误差进行分析，并研究了增大载波频率时的载波相位测距手段。仿真
结果表明，算法能得到较准确的整周模糊度值和精度较高的测距值，实现了载波相位高精度测距。
-This paper realizes the carrier phase ranging in inter-satellite links with the method of dual-frequency pseudo-random
code/carrier phase combination which is to solve the integer ambiguity．On the basis of dual-frequency pseudo-random code/carrier
phase combination theory，the paper analyzes the measurement errors of different combinations，and studies the carrier phase ranging
methods with the carrier frequency increasing．The result of simulation proves that the algorithm can get a more accurate value of in-
teger ambiguity and a higher accuracy value of ranging，and it realizes the high precise measurement with carrier phase．
Platform: |
Size: 508928 |
Author:wangmingxiao |
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Description: 超紧耦合是 GPS/INS 组合导航系统的最新研究方向，它采用 INS 测得的载体动态信息辅助 GPS 接收机跟踪环
路，消除卫星信号中由于载体与卫星之间相对运动所产生的频率偏移，提高接收机在高动态环境下载波跟踪性能，同时还
可以压缩带宽，有效增强接收机抗干扰性能。介绍 GPS/INS 超紧耦合技术，给出 INS 辅助 GPS 载波跟踪环路结构图和相应
的数学模型，分析 INS 辅助 GPS 跟踪环路在动态环境下的动态残留及其对环路相位误差的影响，并进行了模型仿真，最后
对仿真结果进行了验证分析。仿真结果显示，辅助动态残留及其导致的环路相位误差的大小与加加速度、环路辅助时间间
隔成正比。
-The ultra-tightly coupled GPS/INS integrated navigation system latest research direction, it adopted the INS measured the carrier dynamic information auxiliary GPS receiver tracking loop to eliminate the satellite signal frequency due to the relative motion between the carrier and the satellite offset improve the receiver in high dynamic environment download wave tracking performance, but also can compress bandwidth, effectively enhance the anti-jamming performance of the receiver. Introduced GPS/INS ultra-tight coupling technology gives INS assisted GPS carrier tracking loop diagram and the corresponding mathematical model to analyze the impact of the INS assisted GPS tracking loop dynamic residues in a dynamic environment and the loop phase error, and model simulation, and analysis of simulation results verified. Simulation results show that the the residual secondary dynamic its resulting size of the error loop phase and jerk loop secondary is proportional to the time interval. Platform: |
Size: 197632 |
Author:LeeYJ |
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Description:
由于载体对象的高动态特点，其上装载的GNSS 接收机在捕获信号和跟踪定位上面临很大的挑战，因此致使 GNSS/INS 组合系统的定位效果受到严重影响。本论文以 MEMS IMU/GNSS 超紧组合为研究目标，并以 MEMS IMU 环路辅助的GNSS/INS 紧组合技术为研究重点，深入研究了 MEMS IMU 辅助的 GNSS 信号捕获、MEMS IMU 辅助的 GNSS 信号跟踪、MEMS IMU 辅助的 GNSS/INS 紧组合导航定位算法和基于矢量跟踪结构的 GNSS/INS 超紧组合算法，旨在改善MEMS IMU/GNSS 组合导航系统在卫星信号衰减场合中的性能。
-High dynamic characteristics of the carrier object loaded on GNSS receivers face a lot of challenges in the capture of the signal and track positioning on GNSS/INS positioning effect of the combined system, therefore resulting in severely affected. This thesis, MEMS IMU/GNSS super tight combination of research objectives, and to the MEMS IMU loop auxiliary GNSS/INS tight combination of technology with a focus on in-depth study the MEMS IMU Assisted GNSS signal acquisition, MEMS IMU auxiliary of GNSS signal tracking , the MEMS IMU Assisted GNSS/INS tightly integrated navigation positioning algorithm based on the structure of vector tracking GNSS/INS the super tight combination algorithm, designed to improve the performance of MEMS IMU/GNSS integrated navigation system of the satellite signal attenuation occasions. Platform: |
Size: 22207488 |
Author:LeeYJ |
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Description: 在GPS软件接收机和SINS辅助GPS跟踪技术的基础上,提出了一种SINS/GPS超紧致组合导航方案。该超紧致方案在GPS软件接收机的捕获环节中加入了基于相位估计的精细捕获算法,从而提高了频率捕获精度,省略了频率跟踪牵引过程 在信号跟踪环节中,利用SINS位置、速度信息与卫星参数,求取接收机与卫星之间的径向距离和径向距离率,为码环、载波环提供辅助,从而降低了载体动态变化对跟踪环的影响,提高了跟踪环的动态跟踪性能 同时,降低载波环噪声带宽,减小码环相关间隔,从而提高了载波环和码环的跟踪精度。-On the basis of the software GPS receiver and SINS assisted GPS tracking technology, ultra-compact combination of an SINS/GPS navigation scheme. The Super Compact program was added in the capture of the GPS receiver software link based the phase estimate Narrow capture algorithm, thereby improving the accuracy of frequency acquisition, frequency tracking traction process is omitted signal tracking link SINS position, speed information and satellite parameters, to strike a radial distance between the receiver and satellite and the radial distance rate, to provide auxiliary code loop, carrier loop and thereby reducing the influence of the carrier dynamic changes of the tracking loop, and to improve the dynamic tracking of the tracking loop performance while reducing the noise bandwidth of the carrier loop, to reduce the code ring associated interval, thereby improving the accuracy of the tracking of the carrier ring and the code ring. Platform: |
Size: 17408 |
Author:LeeYJ |
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Description: satellite digital radio系统物理层关键技术单载波传输-key technology of satellite digital radio system physical layer single-carrier transmission Platform: |
Size: 161792 |
Author:chenglei |
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Description: A GUI software I made to calculate the carrier-to-noise-density ratio of a earth-satellite link. Platform: |
Size: 1753088 |
Author:Rafal |
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Description:
Quadrature Amplitude Modulation (QAM)
The creation of symbols that are some combination of amplitude and phase can carry the concept of transmitting more bits per symbol further. This method is called quadrature amplitude modulation (QAM). For example, 8QAM uses four carrier phases plus two amplitude levels to transmit 3 bits per symbol. Platform: |
Size: 2048 |
Author:emman |
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