An Intra-Frame Signal Sorting Method Based on Time Hopping Relationship
A sorting and time-hopping technology, which is applied in the field of communication, can solve the problems that DOA cannot distinguish signals and the robustness of fingerprint information is not strong enough, and achieve the effect of strong robustness
Active Publication Date: 2022-02-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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[0002] In signal sorting tasks, information such as DOA or signal fingerprint features is often relied on. However, it is easy to have DOA cannot distinguish signal points, and the robustness of signal fingerprint information is not strong enough.
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[0029] In this example, set N=6, W=19us, and C=45.3us of the communication system.
[0030] figure 1 It is a simulation solution without measurement noise when M=3. It can be seen that the algorithm can sort out the complete frames of the second frame very accurately.
[0031] figure 2 is the confidence degree of the algorithm under the condition of different measurement noise and signal density, and the confidence degree D is defined as follows:
[0032]
[0033] When there is some measurement noise, the algorithm may draw multiple possible frames, with some ambiguity. It can be seen from the figure that with the increase of M and the increase of measurement error, the confidence level also decreases, but even if the measurement error reaches 100 ns, when M=3, the analysis confidence level can exceed 0.8, indicating that the algorithm has A certain robustness.
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The invention belongs to the technical field of communication, and in particular relates to an intra-frame signal sorting method based on a time-hopping relationship. The present invention is aimed at communication signals with a special time-hopping relationship, that is, the interval between pulses satisfies a specific relationship t i +t i+N =C, according to this relationship, use the TOA and TOE information to complete the signal sorting within the frame. The beneficial effect of the present invention is that it has a sorting accuracy rate close to 100% when there is no interference noise, and has strong robustness, and can also have a certain sorting accuracy rate under high signal density and high measurement error.
Description
technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an intra-frame signal sorting method based on a time-hopping relationship. Background technique [0002] In the signal sorting task, information such as DOA or signal fingerprint features is often relied on. However, it is easy to have the situation that DOA cannot distinguish signal points, and the robustness of signal fingerprint information is not strong enough. For these scenarios, it is necessary to rely on more other information for signal sorting. For frequency hopping and time hopping communication systems, its frequency information is difficult to provide help for sorting, but time hopping information can be used as a good anchor point for signal sorting in some specific communication systems. Contents of the invention [0003] Aiming at a certain special time-hopping communication system, the present invention proposes an intra-frame signal sorting ...
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IPC IPC(8): H04B14/02H04B1/69
CPCH04B14/026H04B1/69H04B2001/6908
Inventor 马盛元魏平李万春张花国
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA