An open-loop system design for deep space signal processing applications

Tang, Jifei; Xia, Lanhua; Mahapatra, Rabi

doi:10.1016/j.actaastro.2018.04.015

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…Although PRIDE has been successfully and effectively utilized in several radio science experiments, the algorithm requires massive scale computing, due to PRIDE being designed to process the large wideband VLBI signal received by VLBI telescope. Currently, among the existing open-loop algorithms, some have the disadvantages of complicated algorithms and a huge amount of calculation [6,8], some require special hardware platforms for signal processing [19,20], and others utilize the PLL technique such as real-time PLL in closed-loop mode [10,12], in which the risk of loss-of-lock exists. The post-processing techniques of the open-loop Doppler may differ because different radio science or engineer teams develop their own software for signal processing and application.…”

Section: Introductionmentioning

confidence: 99%

Retrieving Doppler Frequency via Local Correlation Method of Segmented Modeling

et al. 2021

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The high accuracy radio Doppler frequency is critical for navigating a deep space probe and for planetary radio science experiments. In this paper, we propose a novel method based on the local correlation of segmented modeling to retrieve Doppler frequency by processing an open-loop radio link signal from one single ground station. Simulations are implemented, which prove the validity of this method. Mars Express (MEX) and Tianwen-1 observation experiments were carried out by Chinese Deep Space Stations (CDSS). X-band Doppler frequency observables were retrieved by the proposed method to participate in orbit determination. The results show that the accuracy of velocity residuals of orbit determination in open-loop mode is from 0.043 mm/s to 0.061 mm/s in 1 s integration; the average accuracy of Doppler frequency is about 3.3 mHz in 1 s integration and about 0.73 mHz in 60 s integration. The Doppler accuracy here is better than that of the digital baseband receiver at CDSS. The algorithm is efficient and flexible when the deep space probe is in a high dynamic mode and in low signal to noise ratio (SNR). This will benefit Chinese deep space exploration missions and planetary radio science experiments.

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Section: Introductionmentioning

confidence: 99%

Retrieving Doppler Frequency via Local Correlation Method of Segmented Modeling

et al. 2021

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“…In this case, the carrier or tone signal of the deep space probe is processed by modern signal theory to extract high-accuracy Doppler observables. Currently, the existing open-loop algorithms have the disadvantages of complicated algorithms or large computation [ 4 , 5 ] or special hardware platforms [ 6 , 7 ]. Chen et al (2021) presented a Doppler frequency retrieving method via local correlation and segmented model, which was successfully applied to Chinese deep space exploration [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

A High-Accuracy, High Anti-Noise, Unbiased Frequency Estimator Based on Three CZT Coefficients for Deep Space Exploration Mission

Wei

Chen

Wang

et al. 2022

Sensors

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Deep space exploration navigation requires high accuracy of the Doppler measurement, which is equivalent to a frequency estimation problem. Because of the fence effect and spectrum leakage, the frequency estimation performances, which is based on the FFT spectrum methods, are significantly affected by the signal frequency. In this paper, we propose a novel method that utilizes the mathematical relation of the three Chirp-Z Transform (CZT) coefficients around the peak spectral line. The realization, unbiased performance, and algorithm parameter setting rule of the proposed method are described and analyzed in detail. The Monte Carlo simulation results show that the proposed method has a better anti-noise and unbiased performance compared with some traditional estimator methods. Furthermore, the proposed method is utilized to process the raw data of MEX and Tianwen-1 satellites received by Chinese Deep Space Stations (CDSS). The results show that the Doppler estimation accuracy of MEX and Tianwen-1 are both about 3 millihertz (mHz) in 1-s integration, which is consistent with that of ESA/EVN/CDSN and a little better than that of the Chinese VLBI network (CVN). Generally, this proposed method can be effectively utilized to support Chinese future deep space navigation missions and radio science experiments.

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“…fourfit-DOR algorithm to improve fringe fitting of DOR tones. Tang et al (2018) presented an open-loop system embedded with the fast Fourier transform (FFT) and frequency zoom method using Chirp-Z transform algorithm for the estimation of Doppler and time delay of arrival. Hao et al (2020) proposed an adaptive phase tracking approach to estimate the frequency and phase of the DOR tones during the critical phase of powered flight.…”

Section: Introductionmentioning

confidence: 99%

Local correlation of delta-DOR signals with low signal-to-noise ratio and severe radio frequency interference

Ma¹,

Li²,

Tong³

et al. 2021

Meas. Sci. Technol.

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The Chinese very long baseline interferometry net (CVN) has applied the delta differential one-way ranging (delta-DOR) radiometric tracking technique to determine the orbit of a lunar and a deep-space spacecraft. In the past observations, CVN had sometimes encountered a difficult observation situation that the DOR signals were extremely weak or severely interfered. The CVN FX correlator, usually cannot process these extremely weak DOR signals. In order to enhance the weak signal processing capability of CVN, here we report an alternative method called 'local correlation'. By this method, the distinct DOR signals structure features of the narrow bandwidth sinusoidal tone and their coherent phase, are used to extract the exact frequency and phase of each tone. We have adopted the method on the weak signal case, then compared with the results obtained from CVN FX correlator. Analysis result shows the local correlation method can process DOR tone at lower signal-to-noise ratios such as 1 dBHz. The method also has advantages of high anti-interference, low computation cost and high efficiency. Furthermore, the delta-DOR delay obtained from local correlation can improve the orbit accuracy and reduce the arc length required by the orbit determination after the trajectory course maneuver.

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An open-loop system design for deep space signal processing applications

Cited by 5 publications

References 16 publications

Retrieving Doppler Frequency via Local Correlation Method of Segmented Modeling

Retrieving Doppler Frequency via Local Correlation Method of Segmented Modeling

A High-Accuracy, High Anti-Noise, Unbiased Frequency Estimator Based on Three CZT Coefficients for Deep Space Exploration Mission

Local correlation of delta-DOR signals with low signal-to-noise ratio and severe radio frequency interference

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