Air and Missile Defense College

Fengcheng, China

Air and Missile Defense College

Fengcheng, China

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Lu F.,Air and Missile Defense College | Zhang J.,Air and Missile Defense College | Shi H.,Air Force Communications Officer School in Dalian | Wang Q.,Air and Missile Defense College | Wang Y.,Air and Missile Defense College
Chinese Journal of Sensors and Actuators | Year: 2013

In order to solve the problem of sampling with Compressive Sensing (CS) in Wireless Sensor Network (WSN), the method of Randomly Compressive Sampling is studied, which uses Timer to control Analogy to Digital Converter. The experimental results show that the method is effective and feasible. On the basis of this, a new algorithm of Distributed Compressive Sensing in WSN is proposed, which realizes Distributed Compressive Sampling through distributing the random sequence. Then the algorithm of CoSaMP was used to reconstruct original signal with the joined sampling values. Simulation and experiment show that the proposed method can achieve analogy signal collection with a sampling frequency below 1/10 percentage of standard sampling frequency in a star network topology.


Gong J.,Air and Missile Defense College | Wang H.,Air and Missile Defense College | Li Z.-L.,Unit 94746 | Wei L.,Unit 94921
Applied Mechanics and Materials | Year: 2013

Most high-resolution angle estimation algorithms suffer from sensitivity to gain and phase uncertainties. In this letter, a novel ESPRIT-based algorithm, which uses the instrumental sensors method (ISM), is proposed for bistatic MIMO radar with gain and phase uncertainties. With the help of a few well-calibrated transmitting and receiving instrumental sensors, the proposed algorithm is able to achieve favorable and unambiguous angle estimation and accurate self-calibration without the knowledge of gain and phase uncertainties. Simulation results demonstrate the validity of the proposed method. © 2013 Trans Tech Publications Ltd, Switzerland.


Gong J.,Air and Missile Defense College | Lei T.,Air and Missile Defense College | Li Z.-L.,Unit 94746 | Li C.,Unit 94221
Advanced Materials Research | Year: 2013

In this paper, a new micro-motion ISAR imaging algorithm is proposed, which achieve high cross range resolution by using the changes of azimuth angle caused by micro-motion. Before Wigner-Ville transformation to eliminate the cross-term interference, the echoes of the same range cell are decomposed. Comparing to traditional the Wigner-Ville imaging algorithm and Range-Doppler algorithm, this new algorithm in this paper has better imaging precision and no cross-term interference is existed. At last, the effectivity of the proposed algorithm is demonstrated by the simulated results. © (2013) Trans Tech Publications, Switzerland.


Gong J.,Air and Missile Defense College | Guo Y.-D.,Air and Missile Defense College | Xie H.,Air and Missile Defense College | Li Z.-L.,Unit 94746
Advanced Materials Research | Year: 2014

Based on the theory that the steering vectors of coherently distributed targets for bistatic MIMO radar possess a property called Hadamard product rotational invariance (HPRI), a novel central angle estimation algorithm is derived. The proposed algorithm has the advantage of no searching and easily pair the estimated angles. Furthermore, it can deal with different coherently distributed targets with different angular distribution functions or unknown angular distribution functions. Simulation results show the proposed method is effective. © (2014) Trans Tech Publications, Switzerland.


Wang Y.,Air and Missile Defense College | Zhang J.,Air and Missile Defense College | Chen K.,Air and Missile Defense College | Wang Q.,Air and Missile Defense College
Chinese Journal of Sensors and Actuators | Year: 2015

In order to improve the efficiency of spectrum sensing in cognitive radio sensor networks, an energy efficient spectrum sensing period optimization algorithm is proposed. The greedy factor is introduced to reduce the times of spectrum sensing so that the power of this method is lower than conventional ones. With the constraint of collision probability and waiting delay, the sensing period is adaptive adjusted through the interaction with channel. The simulation results show that, with different distributed parameter of channel state, this algorithm can effectively improve the efficiency of spectrum sensing, comparing with fixed periodical sensing method. And it is enforceable for cognitive radio sensor networks. ©, 2015, The Editorial Office of Chinese Journal of Sensors and Actuators. All right reserved.


Wang Y.,Air and Missile Defense College | Zhang J.,Air and Missile Defense College | Wang Q.,Air and Missile Defense College | Lv F.,Air and Missile Defense College | Chen K.,Air and Missile Defense College
Communications in Computer and Information Science | Year: 2015

An approach based on Sparse Sub-band Basis (SSB) for compressive spectrum sensing in Wireless Sensor Network (WSN) is presented in this paper, considering the unsatisfactory accuracy and complex calculation of the traditional ones. It is proved that the SSB matches not only the orthogonality and completeness of the basis, but also the Restricted Isometry Property (RIP) in reconstructing the signal. The simulation results show that the reconstruction based on SSB can detect the accurate location and amplitude of spectrum occupancy, and is more robust than traditional edge detection method. Additionally, this approach has higher compression ratio and less calculation, which is suitable for nodes in WSN. © Springer-Verlag Berlin Heidelberg 2015.


Huang X.,Air and Missile Defense College | Xiang Y.,Air and Missile Defense College | Tong C.,Air and Missile Defense College | Wei N.,Air and Missile Defense College
International Journal of Information and Communication Technology | Year: 2015

Microwave down-converter modules are the key components in communications, radar and electronic warfare systems. The paper presents the design method of a low noise microwave down-converter module. The parameter of each component could be determined by the related parameter curves of the low noise amplifier, the mixer and the noise figure of the system. So, a list of parts which satisfied the needs could be selected out to complete the design. By using two cascaded low noise amplifies in the front end of the circuit, the low noise performance is fulfilled. A mirror suppression balanced mixer is followed to complete the frequency change, which can reduce the mixer noise effectively. Last, two cascaded intermediate frequency amplifies are putted to match the need of the total power gain. A down-converter for up-l ink wideband code division multiple access (WCDMA) repeater is designed according to the analysed result, the overall noise figure is less than 0.8 dB, and the total gain is around 66 dB with 0.8 dB ripple under 60 MHz bandwidth. Copyright © 2015 Inderscience Enterprises Ltd.

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