Broadband multiple correlation flow velocity measurement method
A flow velocity measurement and complex correlation technology, which is applied in the field of broadband complex correlation flow velocity measurement, can solve problems such as narrow range and limited measurement range
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[0033] Embodiment: a broadband complex correlation flow velocity measurement method, including the following steps:
[0034] ① Obtain the echo signal
[0035] ①-1 Use pulse signal generator to generate frequency f 0 Single frequency pulse signal, f 0 =1.5MHz;
[0036] ①-2 The single-frequency pulse signal is binary-encoded using the M sequence code with the number of symbols L and the symbol width Δτ to obtain the sub-pulse signal, the number of symbols L=15, and the symbol width Δτ is filled with 10 single-frequency pulses Signal period, Denote the length of the sub-pulse signal as T, T=L×Δτ, and the symbol × is the symbol of the multiplication operation;
[0037] ①-3 Multiple (ie at least two) sub-pulse signals are successively emitted in the ocean waters where the flow rate is to be measured, and the multiple sub-pulse signals successively emitted in turn form a modulated pulse signal, which is denoted as s( t), t is the time domain time;
[0038] ①-4 Obtain the signal reflected f...
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