Time difference, frequency difference and frequency difference change rate joint estimation method
A technology of joint estimation and frequency difference estimation, applied in joint estimation of frequency difference change rate, frequency difference, and time difference, can solve problems such as three-dimensional search calculation complexity, achieve the effect of improving accuracy, improving positioning accuracy, and enriching positioning parameters
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[0038] The present invention will be described in detail below in conjunction with the accompanying drawings. However, it should be understood that the accompanying drawings are provided only for better understanding of the present invention, and they should not be construed as limiting the present invention.
[0039] Such as figure 1 As shown, the joint estimation method of time difference, frequency difference and frequency difference rate of change provided by the present invention includes the following contents:
[0040] 1. The two receivers collect the signal of the target radiation source synchronously in time, and the collected digital signals are respectively s 1 (n) and s 2 (n):
[0041] the s 1 (n)=s(n)+n 1 (n)-N / 2≤n≤N / 2
[0042]
[0043] In the formula, s(n) represents the target radiation source signal, n 1 (n) and n 2 (n) represent the noise signal of the receiver respectively, τ represents the arrival time difference of the signals collected by the tw...
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