High-precision digital array multi-channel delay compensation method
A technology of digital array and delay compensation, applied in the field of digital array, can solve the problem of no high-precision random delay compensation method
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[0090] Embodiment 1 of the present invention provides a high-precision digital array multi-channel delay compensation method, figure 1 A hardware block diagram of a high-precision digital array multi-channel delay compensation method provided by an embodiment of the present invention, the method includes the following steps:
[0091] Step 1. The radio frequency source generates a calibration signal. The calibration signal is a chirp signal with a bandwidth of B and a signal duration of T. The calibration signal is delayed, and the expression of the signal arriving at the entrance of the mixer is:
[0092] S d (t)=Acos[ω 0 (t-t d )+0.5k(t-t d ) 2 ) (1)
[0093]In the formula, t d - channel delay, A - signal amplitude, ω 0 -carrier frequency, T-signal duration, k-FM slope, when the signal bandwidth is B, k=2πB / T;
[0094] Among them, -0.5T+t d ≤t≤0.5T+t d ;
[0095] Step 2. The calibration signal reaches the radio frequency receiving end of each channel of the digital...
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