Impact analysis of residual code phase and carrier frequency error on GPS signal tracking and its improvement

2005 ◽  
Author(s):  
Yunlong Zhu ◽  
Dongkai Yang ◽  
Qishan Zhang
Keyword(s):  
Carrier Frequency ◽  
Impact Analysis ◽  
Frequency Error ◽  
Signal Tracking ◽  
Residual Code

A filter algorithm for receiver tracking loops assisted by inertial information

2021 ◽  
pp. 1-11
Author(s):  
Zhifeng Han ◽  
Zheng Fang
Keyword(s):  
Integration Time ◽  
Frequency Error ◽  
Loop Filter ◽  
Signal Tracking ◽  
Phase Jitter ◽  
Loop Bandwidth ◽  
Tracking Ability ◽  
Negative Effect ◽  
Tracking Loops ◽  
Signal Environment

Abstract In traditional satellite navigation receivers, the parameters of tracking loop such as loop bandwidth and integration time are usually set in the design of the receivers according to different scenarios. The signal tracking performance is limited in traditional receivers. In addition, when the tracking ability of weak signals is improved by extending the integration time, negative effect of residual frequency error becomes more and more serious with extension of the integration time. To solve these problems, this paper presents out research on receiver tracking algorithms and proposes an optimised tracking algorithm with inertial information. The receiver loop filter is designed based on Kalman filter, reducing the phase jitter caused by thermal noise in the weak signal environment and improving the signal tracking sensitivity. To confirm the feasibility of the proposed algorithm, simulation tests are conducted.

Impact analysis of convected motion on the carrier frequency of a carrier-driven gyroscope signal

2017 ◽  
Vol 23 (12) ◽  
pp. 5805-5813 ◽  
Author(s):  
Ling Wang ◽  
Wei Zhang ◽  
Yuan-an Liu ◽  
Zeng-ping Zhang ◽  
Fu-xue Zhang
Keyword(s):  
Carrier Frequency ◽  
Impact Analysis

A Design of Wireless Transmission System

2011 ◽  
Vol 187 ◽  
pp. 621-624 ◽  
Author(s):  
Xiao Yan Huang ◽  
Wei Su
Keyword(s):  
Carrier Frequency ◽  
Experimental Tests ◽  
Transmission System ◽  
Wireless Transmission ◽  
Modulation Scheme ◽  
Data Detection ◽  
Frequency Error ◽  
Main Body ◽  
Analog Signals ◽  
Water Temperature Data

To design a wireless transmission system for water temperature data detection .This system uses FM as modulation scheme. The launching part adopts MC12017 and MC145152 as PLL, enabling to decrease the carrier frequency error to 1.8×10-4. The carrier frequency modulation is achieved by transfiguration diode HS113 and integrated VCO MC1648. The final stage amplifier adopts triode 2SC2053 with transmission power amounting to 0.245 mw. The receiving part adopts FM receiver chip MC3362 with low consumption and narrowband as main body, analog signals being amplified by LM386. C8051F410 is used as the control chip in the whole system to decode, frequency measure, and display. Experimental tests show that this system consumes lower power, reliable and steady, and is able to correctly transmit and receive data.

Tracking Optimization of FH Signal Based on Wiener Filtering

2014 ◽  
Vol 989-994 ◽  
pp. 4038-4041
Author(s):  
Qian He ◽  
Guang Zhi Wu ◽  
Yan Jun Wu
Keyword(s):  
Carrier Frequency ◽  
Wiener Filter ◽  
Wiener Filtering ◽  
Loop Structure ◽  
Filter Coefficient ◽  
Tracking Accuracy ◽  
Frequency Signal ◽  
Signal Tracking ◽  
Filter Order ◽  
Simulation Results

Comparing with the traditional fixed carrier frequency signal, using FH (Frequency-Hopped) signals improved the performance of anti-interference of the TT&C system when bring the low signal tracking accuracy. In order to solve this problem, this paper proposed a loop structure of using wiener filter, the filter coefficient was deduced. Simulation results show that the loop tracking precision was increased after the optimization, and the improvement has relations with the filter order n. When, the speed measuring precision reached 30cm/s which was increased about 3 times than did not use wiener filter.

scholarly journals Vector Tracking Algorithm Based on Adaptive Cubature Kalman Filter

2018 ◽  
Vol 36 (6) ◽  
pp. 1108-1115
Author(s):  
Xiaojun Zou ◽  
Baowang Lian ◽  
Zesheng Dan
Keyword(s):  
Kalman Filter ◽  
Carrier Frequency ◽  
Phase Error ◽  
Tracking Algorithm ◽  
Frequency Error ◽  
Test Results ◽  
Tracking Loop ◽  
Cubature Kalman Filter ◽  
Vector Tracking ◽  
Present Algorithm

In the vector tracking loop, there is a great error in the output of discriminator owing to the disturbance of noise. Cubature Kalman filter is proposed to replace the discriminator to process I/Q data and generate code phase error and the carrier frequency error in this paper. The present algorithm not only can avoid the nonlinear problem of discriminator, but also can reduce the bad effect of noise. Moreover, using cubature Kalman filter to deal with the nonlinear I/Q data is beneficial to preserve the accuracy of data processing. Because noise is unknown or time-varying, the filter should have the ability to respond to the changes of environmental noise. The innovation of measurements is used to estimate the covariance matrix of measurement noise in real time. Finally, a comparison is carried out between the present algorithm and the vector tracking algorithm based on discriminator. The test results show that the code phase error and the carrier frequency error are smaller, and the accuracy of navigation solution is also higher.

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