A tracking interference identification method for narrow-band low-speed frequency-hopping signals
A technology for tracking interference and frequency hopping signals, applied in the direction of communication interference, transmission systems, electrical components, etc., can solve problems such as reducing the transmission rate of communication signal services, and achieve the effect of realizing network communication performance and ensuring accuracy
Active Publication Date: 2019-11-12
GUANGZHOU HAIGE COMM GRP INC
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However, as the duration of the single-hop signal decreases, the proportion of overhead such as pilot frequency and frequency switching protection in the one-hop signal will increase accordingly, thereby reducing the service transmission rate of the communication signal
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[0058] Wavelet theory is widely used in the field of signal processing. The minimum energy wavelet frame can make up for the defects that orthogonal wavelets cannot have compact support, smoothness and symmetry at the same time. It has obtained relatively good results in various types of signal processing and analysis. Good application effect. The minimum energy wavelet frame can not only use the decomposition and reconstruction formula of the frame, but also can use the classic tower decomposition and reconstruction algorithm in wavelet theory, which constitutes the basis for the analysis and processing of digital signals.
[0059] Lemma 1: If the sequence q i [k] :i=1,2,...,N generated previous sum sequence p [k] The associated minimum energy wavelet frame, then for any sequence There are decomposition algorithms as follows:
[0060]
[0061]
[0062] Its reconstruction algorithm is as follows:
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[0064] And satisfy the energy invariance equation bef...
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The invention discloses a tracking disturbance identification method for narrowband low speed frequency hopping signals. For the receiving signal of a receiving node, signal transmission is carried out in time slot. A CRC detection function detects whether a signal is correctly received. If the signal reception signal to noise ratio evaluation value of a certain time slot is better, but the received CRC detection result is wrong, a tracking interference identification method is started. The method comprises the steps that a hop-receiving baseband signal is divided into delta segments of segmentation signal; after the absolute value of each segmentation signal is acquired, the minimum energy wavelet framework is used to decompose A sub-signal sequences; the energy distribution ratio of A sub-signals of each segmentation signal is calculated; the energy ratio distribution mean value of A sub-signals is calculated by taking a previous B segment signal as the benchmark; and segmentation threshold decision and a decision result smoothing mechanism are introduced to ensure that the identification method is highly sensitive and accurate for signal to noise ratio changes and lay a foundation for the application of a hopping speed self-adaptive communication system.
Description
technical field [0001] The invention relates to the communication field of tracking interference, in particular to a tracking interference identification method for narrow-band low-speed frequency hopping signals. Background technique [0002] In the field of tactical communications, communication and jamming are a pair of eternal research focuses. Tactical radio stations in all countries in the world generally support the narrowband frequency hopping communication system, and the tracking and jamming technology for this system is also produced accordingly. Tracking jamming is issued by the enemy's jamming equipment. The jamming equipment first analyzes the signal in the air, and quickly tracks and sends out jamming. This method is characterized by strong pertinence, and data frames may be interfered at every hop. The traditional solution is to avoid tracking interference by means of fast frequency hopping. However, after increasing the hopping speed, the duration of a si...
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IPC IPC(8): H04K3/00H04B1/715
CPCH04B1/715H04K3/22
Inventor 谢映海索思亮
Owner GUANGZHOU HAIGE COMM GRP INC