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Blind Estimation Method of Asynchronous Frequency Hopping Signal Parameters Based on Frequency Splicing

A frequency hopping signal and blind estimation technology, applied in the field of communication, can solve problems such as blind estimation

Active Publication Date: 2017-11-21
XIDIAN UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a method for blind estimation of asynchronous frequency hopping signal parameters based on frequency splicing to solve the blind estimation of frequency hopping signal parameters under the frequency collision scenario in an asynchronous non-orthogonal network To improve the adaptability of frequency hopping parameter estimation method to noise

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  • Blind Estimation Method of Asynchronous Frequency Hopping Signal Parameters Based on Frequency Splicing
  • Blind Estimation Method of Asynchronous Frequency Hopping Signal Parameters Based on Frequency Splicing
  • Blind Estimation Method of Asynchronous Frequency Hopping Signal Parameters Based on Frequency Splicing

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Embodiment Construction

[0081] The present invention will be further described below in conjunction with the accompanying drawings.

[0082] Refer to attached figure 1 , the concrete steps of the present invention are as follows.

[0083] Step 1, receive the signal.

[0084] The radar antenna receives any segment of the analog signal.

[0085] Step 2, signal sampling.

[0086] For any segment of analog signal received by the radar antenna, the sampling frequency f s Sampling is performed to obtain a discrete signal. The range of sampling frequency is: 10MHz≤f s ≤40MHz.

[0087] In the embodiment of the present invention, the sampling frequency is 20 MHz.

[0088] Step 3, perform short-time Fourier transform on the discrete signal according to the following formula to obtain the time-frequency domain signal.

[0089]

[0090] Among them, Y(l,q) represents the time-frequency domain signal obtained by short-time Fourier transform, l represents the frequency domain sampling point number of the...

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Abstract

The invention discloses an asynchronous frequency hopping signal parameter blind evaluation method based on frequency splicing. The blind evaluation method comprises steps of 1: receiving signals; 2: sampling signals; 3: performing short-time Fourier transform; 4: extracting sequence numbers; 5: calculating frequency; 6: clustering the frequency; 7: initially evaluating hopping period; 9: detecting collision frequency; 10: resolving the collision frequency; 11: constructing matrixes; 12: splicing the frequency; 13: precisely evaluating hopping period; 14: evaluating hopping time; and 15: evaluating frequency. According to the invention, the problem of hopping signal parameter blind evaluation in frequency collision occasions in an asynchronous nonopiate network is solved; and adaptability to noise of the hopping signal parameter evaluation method is improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for blindly estimating parameters of asynchronous frequency hopping signals based on frequency mosaic in the technical field of wireless communication and signal processing. Under the condition that any a priori information of the channel and signal is unknown, only according to the received signal, the method of frequency splicing is adopted to realize the blindness of multiple frequency hopping signal parameters under the frequency collision scenario in the asynchronous non-orthogonal network. estimate. Background technique [0002] Frequency hopping communication has been widely used in military and civilian communications because of its low intercept probability, strong networking capability, and good interference resistance performance. Frequency hopping parameter estimation is a key link in frequency hopping reconnaissance technology, and its research ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/713
CPCH04B1/713
Inventor 付卫红田德艳王璐刘乃安李晓辉黑永强韦娟
Owner XIDIAN UNIV
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