A Parameter Estimation Method for High Dynamic Signal Based on Delay Correlation Function
A delay correlation, signal parameter technology, applied in the reflection/re-radiation of radio waves, instruments, measurement devices, etc., can solve the problems of low dynamic parameter estimation accuracy, short delay time, and no consideration, and improve the dynamic parameter estimation resolution. High speed, high real-time performance, and small storage capacity
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[0029] First, the principle of the parameter estimation method based on the delay correlation function of the present invention is as follows:
[0030] Under multi-order dynamics, without considering the noise interference, the received baseband signal can be expressed as
[0031]
[0032] in, T p is the pulse width, f c is the carrier frequency, γ is the modulation frequency, T r is the pulse repetition interval, t m =mT r is the slow time, t s =t-t m is the fast time, and N is the highest dynamic order. Distance R(T k )for:
[0033]
[0034] Among them, a 0 is the initial distance between the radar and the target, a 1 , a 2 ,...,a N The target dynamic parameters of each order respectively.
[0035] Calculate the first-order delay correlation function R of the received signal 1
[0036]
[0037] in,
[0038]
[0039] τ 1 is the fast time dimension delay variable, q 1 is the slow time dimension delay variable.
[0040] k-order delayed correlati...
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