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Study on Link16 System with Frequency Hopping Collision Interference
Xiaoheng Tan,Chao Yao,Tintin Pan,Dujuan Liang 보안공학연구지원센터 2015 International Journal of Future Generation Communi Vol.8 No.2
Aiming at studying the jamming methods of Link16 system, the anti-jamming techniques adopted by Link16 are studied and a simulation model is established in the paper. Based on the conventional static multi-tone interference which is used frequently at present, a new dynamic jamming method named Frequency Hopping Collision (FHC) interference is put forward. The features and jamming performance of FHC interference in the condition of different frequency hopping rate are analyzed and simulated. According to the analysis and simulation results, the jamming performance, advantages and disadvantages of the two jamming methods are compared in the same conditions. It is concluded that the new FHC interference has advantages over multi-tone interference from the aspects of utilization rate of jamming power and complexity of realization in jammer and also provides a new way for the jamming of Link16 system.
An Unambiguous Deterministic Compressed Acquisition Technique for BOC Signal
Xiaoheng Tan,Yan Zhang,Qiang Yan,Tingting Pan,Xiaonan Hu 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.9
The long PN code in a Binary Offset Carrier (BOC) modulated signal has a higher rate than the GPS C/A code, which makes the acquisition process in the new global navigation satellite system (GNSS) much more complex. To achieve a fast acquisition of the GNSS signal with a reduced number of correlators and low computational complexity, a two-stage deterministic compressed (DS) GNSS acquisition technique has been proposed. Nevertheless, the ambiguous threat of BOC signal isn’t taken into account in the DS technique. To eliminate the ambiguity threat in the acquisition process of BOC (m, n) signal, an unambiguous deterministic compressed acquisition is proposed in this paper. The main idea of the proposed technique is to introduce a simplified GRASS algorithm in the second stage measurement. Theoretical analysis and simulation results show that, at the expense of some performance degradation the proposed technique can completely remove the undesired positive side peaks of BOC (m, n) signal, and reduce the chance of false peak acquisition compared with the DS technique.
Integrate Advantage of Geographic Routing and Reactive Mechanism for Aeronautical Ad Hoc Networks
Xiaoheng Tan,Xiaonan Hu,Pengfei Qu,Zhengnan Zhu,Yan Zhang 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.7
Large scale range and high dynamic topology are the two major features of Aeronautical Ad Hoc Networks (AANETs), which present severe challenges to provide efficient and reliable data packet delivery in aviation communication networks. Geographic routing has been studied as an attractive option for routing in aeronautical networks due to its simplicity and scalability. However there are still some problems such as low packet delivery ratio and less reliability for long dynamic links. In this paper, we improve the greedy forwarding strategy and start with the idea of integrating reactive routing mechanism with geographic routing protocol, referred to as IRG (Improved Reactive and Geographic) routing protocol. Variety simulations have been performed to evaluate the performance of the proposed routing protocol, and the results show that it can increase the packet delivery ratio efficiently.
Computationally Efficient 2-D DOA Estimation Using Two Parallel Uniform Linear Arrays
Hailin Cao,Lisheng Yang,Xiaoheng Tan,Shizhong Yang 한국전자통신연구원 2009 ETRI Journal Vol.31 No.6
A new computationally efficient algorithm-based propagator method for two-dimensional (2-D) direction-of-arrival (DOA) estimation is proposed, which uses two parallel uniform linear arrays. The algorithm takes advantage of the special structure of the array which enables 2-D DOA estimation without pair matching. Simulation results show that the proposed algorithm achieves very accurate estimation at a computational cost 4 dB lower than that of standard methods.