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A Time Delay Estimation Method to Eliminate Phase Ambiguity

A technology of phase ambiguity and time delay estimation, applied in radio wave measurement systems, instruments, etc., can solve problems such as phase ambiguity and achieve high-resolution effects

Active Publication Date: 2022-07-12
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a time delay estimation method for eliminating phase ambiguity, perform defuzzification processing on the phase function containing time delay information, and solve the problem of phase ambiguity suffered by the traditional time delay estimation method problem, and time delay estimation, using the limited amount of data and resources, gives a time delay estimate with a higher resolution

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  • A Time Delay Estimation Method to Eliminate Phase Ambiguity
  • A Time Delay Estimation Method to Eliminate Phase Ambiguity
  • A Time Delay Estimation Method to Eliminate Phase Ambiguity

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Embodiment Construction

[0062] The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0063] like figure 1 As shown, a time delay estimation method for eliminating phase ambiguity includes the following steps:

[0064] S1. Do N-point DFT on the two received signals and transform them into the frequency domain;

[0065] In the embodiment of the present application, the step S1 includes the following sub-steps:

[0066] S101. Let the two signals received from the received signal be:

[0067]

[0068] Among them, s(n) is the transmitted signal, A 1 , θ 1 , D 1 and g 1 (n) are the amplitude attenuation, initial phase, propagation delay and receiver noise of the first received signal, respectively; A 2 , θ 2 , D 2 and g 2 (n) are the amplitude attenuation, initial phase, propagation delay and receiver noise of the second received sig...

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Abstract

The invention discloses a time delay estimation method for eliminating phase ambiguity, comprising the following steps: S1. Do N-point DFT on two received signals, and transform them into frequency domain; S2. Calculate a phase function including time delay information; S3. Deblurring the phase function; S4. Estimating the time delay for the phase function after the deblurring process; The time delay estimation method for eliminating the phase ambiguity of the present invention solves the problem that the traditional time delay estimation introduces phase ambiguity . The invention provides a time delay estimation method for eliminating phase ambiguity, deblurring a phase function including time delay information, solving the problem of phase ambiguity suffered by the traditional time delay estimation method, and performing time delay estimation, using Due to the limited amount of data and resources, delay estimates with higher resolution are given.

Description

technical field [0001] The invention relates to time delay estimation technology, in particular to a time delay estimation method for eliminating phase ambiguity. Background technique [0002] Time delay is an important parameter that characterizes a signal. Accurately and rapidly estimating and measuring the time delay between the homologous signals received by the receiver or receiving array can further determine other related parameters, such as the distance, azimuth, and distance of the source. speed and direction of movement, etc. Therefore, time delay estimation has become a very active research topic in the field of signal processing in recent years. Wide range of applications. [0003] According to different target sources and detection systems, delay estimation can be divided into two types: active delay estimation and passive delay estimation. Active delay estimation is that radar or sonar sends out electromagnetic waves or sound waves to search for targets, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41G01S7/52
CPCG01S7/41G01S7/52
Inventor 郭文博赵宏志唐友喜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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