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- Lingji Xu, Zhengke Miao, Yingqian Wang
- J. Comb. Optim.
- 2014

- Yingqian Wang, Lingji Xu
- Discrete Applied Mathematics
- 2013

- Owen Hill, Diana Smith, Yingqian Wang, Lingji Xu, Gexin Yu
- Discrete Mathematics
- 2013

- Yingqian Wang, Lingji Xu
- SIAM J. Discrete Math.
- 2013

- Lingji Xu, Yixin Yang, Long Yang
- 2013 IEEE International Conference on Signal…
- 2013

In order to estimate the instantaneous frequency rate (IFR) of a polynomial phase signal (PPS) with arbitrary order, a new kind of transform referred to as L-phase distribution (LPD) is defined. The principle and realization procedure of this transform are given in detail. Furthermore, we propose an iterative IFR estimation algorithm, in which successive… (More)

- Lingji Xu, Yixin Yang, Shiduo Yu
- The Journal of the Acoustical Society of America
- 2015

The received Doppler signal of a stationary sensor, as emitted by a transiting acoustic source, is used to estimate source motion parameters, including speed, closest distance, rest frequency, and closest point of approach (CPA) time. First, the instantaneous frequency, amplitude, and CPA time are accurately estimated by the polynomial chirplet transform of… (More)

- Shiduo Yu, Daniel Fernández Comesaña, Graciano Carrillo Pousa, Yixin Yang, Lingji Xu
- The Journal of the Acoustical Society of America
- 2016

This paper presents the foundations of a unidirectional acoustic probe based on the particle velocity gradient. Highly directional characteristics play a key role in reducing the influence of undesired acoustic sources. These characteristics can be achieved by using multiple acoustic sensors in a spatial gradient arrangement. Two particle velocity sensors… (More)

- Lingji Xu, Yixin Yang
- 2013 IEEE International Conference on Signal…
- 2013

According to the Doppler Effect between moving acoustic source and receiver, an approach is proposed for identification of tone noise sources on underwater moving object with single hydrophone. Firstly, the product high-order ambiguity function (PHAF) is used to estimate the instantaneous phase and amplitude of the received Doppler signal. Then the abeam… (More)

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