Time filter

Source Type

Beijing, China

Yang B.,PLA Second Artillery Engineering University | Peng P.-L.,Unit 96656 of PLA | Wang Y.-G.,PLA Second Artillery Engineering University | Zhou X.-G.,PLA Second Artillery Engineering University
Zhongguo Guanxing Jishu Xuebao/Journal of Chinese Inertial Technology | Year: 2013

An independent alignment method of strapdown inertial navigation system (SINS) aided by odometer on moving base was researched in this paper. The odometer and gyroscopes in SINS were adopted to achieve accurate dead reckoning, and the error models of dead reckoning were built. The errors of SINS and dead reckoning system were chosen as the system states, and the attitude and velocity outputs of dead reckoning system and SINS were chosen as the observations. Then Kalman filter was adopted to design the alignment method on moving base. Simulation results show that, under the condition of moving base, the horizontal aligning accuracy of this method is 0.5′, and the azimuth aligning accuracy is 3.9′.

Yu N.,PLA Second Artillery Engineering University | Ma H.,PLA Second Artillery Engineering University | Jiang Q.,PLA Second Artillery Engineering University | Shi L.,Unit 96656 of PLA
Zhongguo Kongjian Kexue Jishu/Chinese Space Science and Technology | Year: 2013

In blind source separation(BSS), the single-channel broadband receiver often intercepts the multiple independent emitter signals. A new algorithm was proposed, in which SSA(singular spectrum analysis)and BSS methods were jointly used. The single-channel signal was firstly changed into pseudo-array signals via SSA method. Then, each source signal was separated via a conventional BSS algorithm. Simulation results indicate that the proposed algorithm can effectively separate the single-channel signals which consist of the signals normally used in electronic reconnaissance, for example, when the single-channel signal was mixed by a single-frequency signal and a linear frequency modulation signal, the semblance coefficient between original and separated signals are greater than 0.9 when SNR is 6 dB. For the single-channel signal mixed by the different phase shift keying signals, their bit error rate is less than 0.01 after the source separation when SNR is 4 dB.

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