Method for calculating output quantity of power amplifier by using Volterra correction model
A technology for power amplifiers and correction models, applied in power amplifiers and other directions, can solve the problems of narrow frequency band, difficult application, inability to meet broadband communication systems, etc., and achieve the effect of improving accuracy and simplifying the number of coefficients
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[0026] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:
[0027] The method of calculating the output of the Doherty power amplifier using the Volterra modified model, such as figure 2 As shown in the flowchart, it includes the following steps:
[0028] Step 1, set the correction constraints of each input signal: α∑m+β*p≤-lnε,
[0029] Among them: α, β and ε are correction coefficients, p is the nonlinear coefficient of each input signal, and ∑m is the sum of memory depth of all input signals.
[0030] Step 2, measure the input power P of the power amplifier in =10W, gain G=20dB, 5th (q=5) order intermodulation component I 5 =-40dBc, calculate the correction coefficients α, β and ε, and determine the correction constraint expression described in step 1:
[0031] ϵ = P in × 10 ...
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