High Dynamic Carrier Tracking Using Kalman Filter Aided Phase-Lock Loop

Li, Weibin; Liu, Shanjian; Zhou, Chunhui; Zhou, Shidong; Wang, Tingchang

doi:10.1109/wicom.2007.174

Cited by 7 publications

(6 citation statements)

References 4 publications

(12 reference statements)

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“…Usually, two kinds of INS information are used to aid the carrier loop: Doppler derived from the integration filter [ 4 ] and delta Doppler over integration time [ 18 ]. For a second-order carrier loop, there is no steady-state error when tracking the velocity under ideal conditions, while there will be a steady-state error under acceleration.…”

Section: The Principle Of Delta Doppler Aided Pllmentioning

confidence: 99%

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An Adaptive INS-Aided PLL Tracking Method for GNSS Receivers in Harsh Environments

Tian

et al. 2016

Sensors

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As the weak link in global navigation satellite system (GNSS) signal processing, the phase-locked loop (PLL) is easily influenced with frequent cycle slips and loss of lock as a result of higher vehicle dynamics and lower signal-to-noise ratios. With inertial navigation system (INS) aid, PLLs’ tracking performance can be improved. However, for harsh environments with high dynamics and signal attenuation, the traditional INS-aided PLL with fixed loop parameters has some limitations to improve the tracking adaptability. In this paper, an adaptive INS-aided PLL capable of adjusting its noise bandwidth and coherent integration time has been proposed. Through theoretical analysis, the relation between INS-aided PLL phase tracking error and carrier to noise density ratio (C/N0), vehicle dynamics, aiding information update time, noise bandwidth, and coherent integration time has been built. The relation formulae are used to choose the optimal integration time and bandwidth for a given application under the minimum tracking error criterion. Software and hardware simulation results verify the correctness of the theoretical analysis, and demonstrate that the adaptive tracking method can effectively improve the PLL tracking ability and integrated GNSS/INS navigation performance. For harsh environments, the tracking sensitivity is increased by 3 to 5 dB, velocity errors are decreased by 36% to 50% and position errors are decreased by 6% to 24% when compared with other INS-aided PLL methods.

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Section: The Principle Of Delta Doppler Aided Pllmentioning

confidence: 99%

“…However, a narrower noise bandwidth and longer integration time are required to decrease the thermal noise and improve the tracking sensitivity. For these two constraints, certain scenarios with high dynamic and signal attenuation will make it more difficult for GNSS signal to remain locked [ 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

An Adaptive INS-Aided PLL Tracking Method for GNSS Receivers in Harsh Environments

Tian

et al. 2016

Sensors

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“…At present, the carrier tracking method under high dynamic condition including the method based on kalman filter, the method assisted by FLL, and the method assisted by maximum likelihood estimation. Among them, kalman filter is used to estimate carrier phase difference, Doppler frequency and its change rate, and can adaptively adjust the loop parameters, but the uncertainty of the environment factors on the stability of the system greatly, and the computation is high, not easy to be implemented [6,7]. FLL has good resistance to dynamic stress, is responsible for eliminating most of the dynamic characteristics, but its tracking accuracy is low.…”

Section: Introductionmentioning

confidence: 99%

An approved frequency tracking method in connected element interferometry

2017

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Abstract. Carrier tracking loop is a basic method of frequency tracking in CEI (connected element interferometry), but the tracking error is very large or even worse at high dynamic. To solve this problem, a frequency tracking method assisted by open loop frequency estimation is proposed in this paper. First, an open-loop frequency estimation algorithm is used to estimate the frequency of signals at different moments, then, the least squares fitting method is used to estimate the corresponding dynamic parameters of different orders. Next, a local signal is generated to compensate the received signal. After eliminating most of the dynamic characteristics, the signal is fed into PLL (Frequency locked loop) and high-precision frequency tracking results can be obtained. Simulation results show that, in the condition of low SNR, the new method has higher accuracy than the method assisted by FLL (Frequency locked loop), and the processing time is shorter. When there is a two order Doppler frequency change, the open-loop assisted method can overcome the steady phase error of the PLL, and is of great significance in the applications of connected elements interferometry.

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“…Such huge Doppler shift is close to data transmission rate and will significantly degrade the performances of carrier recovery. Provided the PLL technique is applied in high mobility environment to realize synchronization, a wider loop bandwidth is needed [1]. However, the increase of loop bandwidth will also introduce more noise, which in turn degrades the performances.…”

Section: Introductionmentioning

confidence: 99%

Application of LDPC Erasure Correcting Codes in High Mobility Satellite Communication

Wang¹,

Guo²,

Zhang³

2017

Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)

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Abstract. Providing reliable broadband satellite communications in high mobility environments has attracted considerable attentions in the past few years. One of the biggest challenges is caused by the large Doppler frequency shift due to the rapid relative motion between the transmitters and receivers. The shift, which usually changes with time, can lead to the data loss. The present approaches to mitigate the effect of the shift are concentrated in improving the performance of carrier synchronization, which ensures all the data can be received as much as possible. However, these approaches will exactly increase the complexity of hardware implementation and introduce longer time delay in satellite communication systems. In order to tackle the data loss issues and reduce implementation complexity, we propose a new method in this paper from the perspective of channel coding. Low density parity check (LDPC) codes, which have good performance over erasure channel, are adopted to recover lost data package in high mobility environment. Our algorithm is capable of reducing the complexity of carrier synchronization. The data loss is tolerant and can be recovered by the receiver. The complexity of our proposed algorithm is proportional to code length n. Simulation results show that the channel erasure technique based on LDPC codes can recover the lost data completely within the range of the erasure probability threshold.

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High Dynamic Carrier Tracking Using Kalman Filter Aided Phase-Lock Loop

Cited by 7 publications

References 4 publications

An Adaptive INS-Aided PLL Tracking Method for GNSS Receivers in Harsh Environments

An Adaptive INS-Aided PLL Tracking Method for GNSS Receivers in Harsh Environments

An approved frequency tracking method in connected element interferometry

Application of LDPC Erasure Correcting Codes in High Mobility Satellite Communication

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