This paper focuses on the signal modeling and character analysis in the passive radar system using global navigation satellite system (GNSS) satellites as illuminators of opportunity. The signal model derived from the...
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The range gate pull off (RGPO) jamming is considered as common electronic countermeasures (ECM) technique used to deceive radar tracking system. Under the stationary assumption, traditional slow-time pulse diversity a...
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ISBN:
(纸本)9781849199940
The range gate pull off (RGPO) jamming is considered as common electronic countermeasures (ECM) technique used to deceive radar tracking system. Under the stationary assumption, traditional slow-time pulse diversity approach needs several pulse repetition intervals (PRIs). However in the presence of RGPO, jamming signals would change fast over PRIs, making stationary hypothesis invalid. Therefore in order to solve this problem, a jamming cancelation approach based on the theory of pulse diversity is proposed in this paper to suppress deception RGPO jamming. In the proposed method, different from the conventional slow-time method, the proposed joint slow/fast time method implements a transmission pulse block in half quantity of PRI, which is designed based on the orthogonal block structure. Then after a simple one-step matched-filtering operation, jamming signal under RGPO can be suppressed efficiently. Since the cancellation process can be completed within one PRI, the stationary hypothesis is no longer needed. Based on the numeral simulations, it is verified that the proposed method is effective for countering RGPO jamming in rapidly changing condition.
Multi-frequency (MF) interferometric SAR (InSAR) provides an effective way for the surveying of steep terrains. Phase noise filtering is a key step in MF-InSAR processing which determines the quality of the interferog...
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P-band space-based bistatic radar can globally detect and track moving targets with very strong penetration ability and has become an important research field in the radar community recently. This paper discusses the ...
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ISBN:
(纸本)9781849199940
P-band space-based bistatic radar can globally detect and track moving targets with very strong penetration ability and has become an important research field in the radar community recently. This paper discusses the problems of the designing the P-band bistatic space-based radar such as the characteristics analysis of the target RCS, the antenna size analysis, the effect of ionosphere and the influence of sea clutter characteristics. The numerical results were used to verify the theoretical analysis.
Polar code, which is capable of achieving channel capacity, is known as a promising forward error correction(FEC) code in coding theory. In this paper, a four-bank memory architecture is proposed for polar decoder t...
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ISBN:
(纸本)9781509038237;9781509038220
Polar code, which is capable of achieving channel capacity, is known as a promising forward error correction(FEC) code in coding theory. In this paper, a four-bank memory architecture is proposed for polar decoder to store the initial and the intermediate processing data. Based on the proposed load-balance data allocation scheme, each memory bank is able to be equipped with only two access ports, while providing enough data bandwidth demand. Besides, the proposed semi-parallel successive cancellation(SC) polar decoder is optimized by employing the efficient p node and the merged computation of f and g nodes to reduce the decoding latency, which can at most get 62.5% speed improvement with enough processing elements(PEs). In addition, the proposed four-bank memory design can reduce the overall size of memory especially with higher level of parallelism.
SAR imaging is a widely used technique to solve the remote sensing problem. However, the image resolution of traditional imaging methods is limited by signal bandwidth. In order to solve this problem, a new iterative ...
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This paper discusses a new spaceborne large-squint terrain-matching synthetic aperture radar (LSTM-SAR) to effectively image the terrains that do not spread along satellite orbit. Different from the traditional spaceb...
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Unmanned-aerial-vehicle(UAV) synthetic aperture radar(SAR) tomography can overcome the overlapping and geometric distortion inherent in two-dimensional(2-D) SAR and provide three-dimensional(3-D) radar images of obser...
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Synthetic Aperture Radar (SAR) image reconstruction fundamentally constitutes an ill-posed reconstruction conundrum, with the overarching objective of faithfully restoring the'authentic' SAR scenes via radar e...
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UAV Bistatic SAR (UAV BiSAR) distributes the transmitting and receiving system on different UAVs, which has the advantages of anti-reconnaissance, powerful crypticity and anti-interference capability. However, due to ...
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