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[GPS develop] uwbppm DL : 1: 经PPM调制的超宽带信号经高斯白噪声信道的系统仿真,给出了时域和频域图-After the PPM modulation ultra-wide band signal after the Gauss white noise channel system simulation,and give the time domain and the frequency range chart!
Date : 2025-12-29 Size : 4kb User : 谭汉洪
[GPS develop] OFDMBER DL : 0: 有关于OFDM在不同信噪比下的误比特率，大家可以看看啊-on OFDM different signal-to-noise ratio in the bit error rate, we can see ah
Date : 2025-12-29 Size : 3kb User : fancyou
[GPS develop] GCCstandard DL : 0: 广义的互相提取时延算法,此程序是基于matlab的源程序,适用于非高斯信号和高斯白噪声的情况-Generalized mutual delay extraction algorithms, this procedure is based on the matlab source, applicable to non-Gaussian signal and Gaussian white noise situation
Date : 2025-12-29 Size : 1kb User : 张海涛
[GPS develop] rng DL : 0: 通信系统中的噪声发生器，可用于ＣＤＭＡ信号源电路。-Communication system noise generator can be used for CDMA signal source circuit.
Date : 2025-12-29 Size : 1kb User : Li Gengmin
[GPS develop] GPSNaviDataGen_4ch DL : 0: 基于verilog语言的ＧＰＳ模拟源代码，代码为４颗星，包含噪声信号。-GPS-based Analog Verilog language source code, code for the four stars, including the noise signal.
Date : 2025-12-29 Size : 6kb User : Li Gengmin
[GPS develop] GPSposition DL : 0: 卫星单点定位程序，读取卫星数据后，进行精密的卫星定位计算，考虑大气延迟，噪声等干扰-Single point positioning satellite procedures, read the satellite data, the Satellite precise terms, considering the atmospheric delay, noise and other interference
Date : 2025-12-29 Size : 30kb User : 常玲
[GPS develop] simu DL : 0: 生成GPS中频数字信号，卫星数2，为1和11号卫星，信噪比，采样率可调，目前采样率5M，请在linux下运行，先阅读readme，按照步骤进行-IF digital signal to generate GPS satellite number 2, for 1 and 11 satellites, signal to noise ratio, adjustable sample rate, the current sampling rate 5M, please run under linux, read the readme, in accordance with the steps
Date : 2025-12-29 Size : 1.87mb User : 吴中杰
[GPS develop] paper04 DL : 0: Presently FFT usage in GPS receivers has been a topic of extensive study and many improved FFT-based acquisition methods with averaging correlation technique also have emerged. Although averaging arithmetic can reduce the instant processing points of FFT/IFFT, their noise performance is not promising. In this paper a novel compress-sampling algorithm for FFT-base GPS signal acquisition method is proposed. It not only diminishes the size of FFT/IFFT core but also enhances the noise immunity of receiver with its “redundancy” structure. Simulation results of Matlab testify that the computational complexity of the novel algorithm has been efficiently suppressed to only 0.93 over the 2D search method in time domain. At the same time the lower amplitude threshold obtained from the novel method gets a lower false alarm probability comparing with the direct DFT algorithm with no compression. The noise immunity is enhanced-Presently FFT usage in GPS receivers has been a topic of extensive study and many improved FFT-based acquisition methods with averaging correlation technique also have emerged. Although averaging arithmetic can reduce the instant processing points of FFT/IFFT, their noise performance is not promising. In this paper a novel compress-sampling algorithm for FFT-base GPS signal acquisition method is proposed. It not only diminishes the size of FFT/IFFT core but also enhances the noise immunity of receiver with its “redundancy” structure. Simulation results of Matlab testify that the computational complexity of the novel algorithm has been efficiently suppressed to only 0.93 over the 2D search method in time domain. At the same time the lower amplitude threshold obtained from the novel method gets a lower false alarm probability comparing with the direct DFT algorithm with no compression. The noise immunity is enhanced
Date : 2025-12-29 Size : 249kb User : zohreh
[GPS develop] paper03 DL : 0: Presently FFT usage in GPS receivers has been a topic of extensive study and many improved FFT-based acquisition methods with averaging correlation technique also have emerged. Although averaging arithmetic can reduce the instant processing points of FFT/IFFT, their noise performance is not promising. In this paper a novel compress-sampling algorithm for FFT-base GPS signal acquisition method is proposed. It not only diminishes the size of FFT/IFFT core but also enhances the noise immunity of receiver with its “redundancy” structure. Simulation results of Matlab testify that the computational complexity of the novel algorithm has been efficiently suppressed to only 0.93 over the 2D search method in time domain. At the same time the lower amplitude threshold obtained from the novel method gets a lower false alarm probability comparing with the direct DFT algorithm with no compression. The noise immunity is enhanced-Presently FFT usage in GPS receivers has been a topic of extensive study and many improved FFT-based acquisition methods with averaging correlation technique also have emerged. Although averaging arithmetic can reduce the instant processing points of FFT/IFFT, their noise performance is not promising. In this paper a novel compress-sampling algorithm for FFT-base GPS signal acquisition method is proposed. It not only diminishes the size of FFT/IFFT core but also enhances the noise immunity of receiver with its “redundancy” structure. Simulation results of Matlab testify that the computational complexity of the novel algorithm has been efficiently suppressed to only 0.93 over the 2D search method in time domain. At the same time the lower amplitude threshold obtained from the novel method gets a lower false alarm probability comparing with the direct DFT algorithm with no compression. The noise immunity is enhanced
Date : 2025-12-29 Size : 85kb User : zohreh
[GPS develop] chengxingzaosheng DL : 0: 计算在乘性噪声下的信号捕获方法，对捕获的性能进行了分析，能够在matlab环境中运行对结果的分析-Calculated under the multiplicative noise signal acquisition methods, to capture the performance is analyzed, can run in the matlab environment analysis of the results
Date : 2025-12-29 Size : 29kb User : 王博
[GPS develop] code DL : 0: GPS 跟踪环路性能分析, TCXO, OCXO, XO,不同机动,动态的比较,对相位噪声的影响, 仿真-GPS tracking loop performance analysis, TCXO, OCXO, XO, different motor, dynamic comparison of the impact of phase noise simulation
Date : 2025-12-29 Size : 755kb User : vole
[GPS develop] EKF_MEMS DL : 0: 姿态信息是飞行控制中最关键的参数之一,因此姿态测量成为飞行控制系统首要解决的问题。利用多MEMS传感器研制了一种微型姿态测量系统。利用三轴MEMS加速度计和三轴MEMS陀螺数据,由方向余弦矩阵的姿态表示形式推导了扩展Kalman滤波方程,解算出飞行器的俯仰角和横滚角设计专家系统判断飞行器的运动状态,并根据该状态调整滤波算法中的测量噪声矩阵,使系统可同时满足静态情况和动态情况的使用利用空速和高度数据对俯仰角进行修正,利用GPS解算航向角。将实验结果与国外最新的商用自动驾驶仪的姿态结果进行了比较,二者在静态情况下非常吻合,在动态情况下基本吻合。 - The attitude information is one of the most important parameters in flight control systems. This paper describes an attitude measurement system based on a MEMS multi-sensor. The data from 3-axis MEMS accelerators and 3-axis MEMS gyros is used to determine the pitch angle and the roll angle of the air vehicle using an extended Kalman filter (EKF) equation deduced from the direction cosine matrix. An expert system was designed to estimate the vehicle motion to adjust the measurement noise matrix of the extended Kalman filter equation so that the system can be used in dynamic as well as static environments. The measured airspeed and altitude are also used to revise the pitch angle. The heading is determined from GPS information. Test results compare well with an imported commercial autopilot in a static test with less accurate results in a dynamic test.
Date : 2025-12-29 Size : 49kb User : cisca
[GPS develop] IFGPSsystem DL : 0: GPS卫星信号产生传输接收噪声误差 MATLAB 仿真程序-GPS satellite signal transmission receiving noise error MATLAB simulation program
Date : 2025-12-29 Size : 14kb User :
[GPS develop] GPSINS-with-kalman DL : 0: GPSINS组合导航Kalman滤波状态噪声影响分析，北斗导航年会上的关于组合的论述-GPSINS navigation Kalman filter state noise impact analysis, the annual meeting of the Beidou navigation discussion on portfolio
Date : 2025-12-29 Size : 122kb User :
[GPS develop] jtcurran_oscpll_taes2012 DL : 0: Digital GNSS PLL Design Conditioned on Thermal and Oscillator Phase Noise
Date : 2025-12-29 Size : 1.68mb User : 小庄
[GPS develop] signal_gener DL : 0: 用于产生模拟GPS天线前端接收到的中频信号，暂时未加噪声，如有需要，可自行添加。其中关于C/A码产生的函数-Used to generate simulated GPS antenna front-end receiver to the IF signal, plus noise, if necessary, can add their own.
Date : 2025-12-29 Size : 1kb User : andy
[GPS develop] test_CMA_noise DL : 0: 为解决信道中的噪声影响，可采用 CMA算法。当C/A码通过噪声信道时，会产生误码。本作通过CMA算法较好的解决了这个问题。压缩文件里是一个simulink仿真，通过这个仿真不仅可以学习simulink的使用，还能较好的理解噪声对通信的影响-To resolve the effects of noise in the channel, the CMA algorithm may be used. When the C/A code through the noise channel will result in error. For this by the CMA in a better solution to this problem. The compressed file is a simulink simulation simulink use this simulation can not only learn, and also a better understanding of the impact of noise on communication
Date : 2025-12-29 Size : 11kb User : 李
[GPS develop] test_LR_Noise DL : 0: 为解决信道中的噪声问题，可采用LMS和RLS算法。当C/A码通过噪声信道时，会产生误码。本作通过LMS和RLS算法较好的解决了这个问题。压缩文件里是一个simulink仿真，通过这个仿真不仅可以学习simulink的使用，还能较好的理解LMS和RLS算法的原理-, LMS and RLS algorithm can be used to resolve the problem of channel noise. When the C/A code through the noise channel will result in error. This for the better by LMS and RLS algorithm to solve this problem. Compressed file is a simulink simulation simulink use this simulation can not only learn, but also a better understanding of the principle of LMS and RLS algorithms
Date : 2025-12-29 Size : 12kb User : 李
[GPS develop] GPS DL : 0: 在有限的实验条件下，为验证高动态软件GPS接收机信号的捕获和跟踪模型，提出了一种基于软件GPS 接收平台的高动态GPS数字中频信号模拟方法。介绍了软件GPS接收平台的基本结构框架，并根据高动态环境下伪随机码的多普勒效应及本地振荡器的频率误差对接收信号的影响，推导并建立了一种较精确的高动态GPS 数字中频信号模型。为使模型适用于更加复杂的环境，通过设置接收信号的噪声幅值来调整信噪比大小，以确定所需的信号强度；在信号参数的设置过程中调整入射信号与反射信号的幅度比值及反射信号的时间延迟参数，以模拟不同程度的多路径效应对中频信号的影响。仿真结果表明了该方法的有效性。-In order to validate the model for capturing and tracking the high dynamic signal of the software GPS receiver on limited experiment condition, a method for modeling the high dynamic numeric IF signal was presented based on the software GPS receiver platform. The basic frame of the software GPS receiver platform structure was introduced, and according to the impact of the Doppler effect of the pseudo-noise code and the frequency error of the local oscillator on the received signal in high dynamic environment, a more precise model of high dynamic GPS numeric IF signal was deduced and established. To make the model be applicable in more complicated environment, the required intensity of the signal was obtained by setting the noise’s magnitude of the received signal and adjusting the Signal-to-Noise ratio. In the process of setting the signal parameters, the ratio of the incident signal’s magnitude to the reflected one and the time delay of the reflected signal were adjust
Date : 2025-12-29 Size : 705kb User : luchan
[GPS develop] zaoshengtiaopingganrao DL : 0: GPS信号中干扰信号中噪声调频干扰源代码，matlab程序-GPS signal interference signal noise FM Jamming of the source code, matlab program
Date : 2025-12-29 Size : 3kb User : gedajiang

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