A new method for parameter estimation of high-order polynomial-phase signals

Cao, Runqing; Li, Ming; Zuo, Lei; Wang, Zeyu; Lu, Yutong

doi:10.1016/j.sigpro.2017.06.011

Cited by 20 publications

(9 citation statements)

References 19 publications

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“…The different orders of motion are represented by dotted lines with different markers. They all coincide with the theoretical results obtained by (14), represented by solid lines. As shown, the integration loss increased with τ and decreased with the order of motion.…”

Section: A Numerical Evaluation Of the Cpm Effectsupporting

confidence: 90%

“…Therefore, the DFM results obtained for chirp signals can be applied to DSSS signals with only a coefficient amendment. In [9], the results of integration with DFM were modeled as polynomial phase signals [11]- [14]; the optimal and threshold integration times were obtained by simulation and numerical fitting, assuming that the motion components of orders higher than two (acceleration) [15] or three (jerk) [16] could be omitted.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Code Phase Migration and Doppler Frequency Migration Effects in the Coherent Integration of Direct-Sequence Spread-Spectrum Signals

Shen

2019

IEEE Access

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Coherent integration of direct-sequence spread-spectrum (DSSS) signals is a commonly used technique to improve receiver performance. However, this approach is susceptible to the code phase migration (CPM) and Doppler frequency migration (DFM) effects resulting from the relative motion between transmitter and receiver. In this paper, the CPM and DFM effects are explored and characterized. To evaluate the CPM effect, a simple analytic expression for the coherent integration results under motions of arbitrary orders is developed. In addition, the theoretically derived integration loss and time synchronization error caused by CPM are quantitatively examined. The DFM effect is evaluated under the motions of arbitrary orders by Fresnel integration and numerical fitting. The obtained closed-form expressions are verified by simulation and are shown to be useful for the performance analysis and the DSSS receiver design. The theoretical and the numerical results show that when the amount of CPM is larger than about one code chip duration, the signal-to-noise ratio gain obtained by coherent integration no longer increases because of the integration loss caused by CPM. In addition, the integration loss (in decibel units) caused by DFM is approximately inversely proportional to the square of the time-bandwidth product when the time-bandwidth product is small, and it is inversely proportional to the logarithm of the time-bandwidth product when this product is large.

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Section: A Numerical Evaluation Of the Cpm Effectsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Analysis of the Code Phase Migration and Doppler Frequency Migration Effects in the Coherent Integration of Direct-Sequence Spread-Spectrum Signals

Shen

2019

IEEE Access

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“…Thus, the numerical simulation results confirm the effectiveness of the active vibration control scheme based on online disturbance reconstruction, signal differentiation and differentia flatness for vibration attenuation on vehicle suspension systems. For estimation purposes, it has been fixed r = 4 in (24). Indeed the value of r should be selected according to the particular implementation and signal approximation desired into a small window of time.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Variable weight of the passengers and uncertain parametric variations of the suspension components due to fatigue, wear and natural aging represent other unknown possible perturbations that could result in a dynamic performance degradation [21]. Consequently, important estimation techniques of system parameters have been introduced in the literature [22][23][24]. An identification method of boundary forces in beam-like structures using a derivative estimator has been introduced in [25].…”

Section: Introductionmentioning

confidence: 99%

An Active Vehicle Suspension Control Approach with Electromagnetic and Hydraulic Actuators

Beltrán-Carbajal

Valderrabano‐Gonzalez

Favela‐Contreras

et al. 2019

Actuators

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An active vibration control approach from an online estimation perspective of unavailable feedback signals for a quarter-vehicle suspension system is introduced. The application of a new signal differentiation technique for the online estimation of disturbance trajectories due to irregular road surfaces and velocity state variables is described. It is assumed that position measurements are only available for active disturbance suppression control implementation. Real-time signal differentiation is independent of detailed mathematical models of specific dynamic systems and control force generation mechanisms. Active control forces can be supplied by electromagnetic or hydraulic actuators. Analytical and simulation results prove the effective and fast dynamic performance of the online signal estimation as well as a satisfactory active disturbance attenuation on a quarter-vehicle active suspension system.

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“…Suppose a P th order PPS