Transmitting power calibration method and device suitable for multiple frequency points and multiple power points

Abstract

The invention provides a transmitting power calibration method suitable for multiple frequency points and multiple power points, and the method comprises the steps: measuring the corresponding relation between the output power P of all frequency points and all power points supported by to-be-calibrated equipment and a quantized control voltage value V of a power amplifier, and obtaining corresponding P-V curve data; selecting a plurality of calibration frequency points according to calibration precision requirements; taking calibration curve data corresponding to each selected calibration frequency point as a reference calibration curve; and calibrating and configuring the maximum transmitting power of the to-be-calibrated equipment. The invention further provides a corresponding transmitting power calibration device. According to the invention, the calibration reference curve is used as a benchmark, and the compensated power curve obtained by calibration is used for finely adjusting the power, so that the calibration precision can be improved. Precision can be guaranteed through simple linear fitting with few points, calculation complexity is reduced, and therefore production linecalibration working hours are reduced, and working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a transmission power calibration method and device applicable to multiple frequency points and multiple power points. Background technique [0002] Wireless devices generally need to be calibrated before leaving the factory. The purpose is to ensure that the devices can transmit signals with accurate power at different frequency points and different power conditions, so as to ensure the quality of communication. The calibration process of the transmit power is usually to establish the digital quantity (V) and the actual power (P) after the voltage of the control pin of the power amplifier (PA, Power Amplifier) ​​is quantized by the analog-to-digital converter (ADC, Analog-to-Digital Converter). Correspondence between. However, the relationship between P and V is usually nonlinear, and a certain density of measurement points is required to maintain accu...

AI Technical Summary

Problems solved by technology

The linear fitting method of the P-V curve itself will bring certain errors; in fact, when the frequency points change in order of frequency, the V values ​​corresponding to the same power P at different frequency points are usually not linearly increasing or decreasing, and adjacent The V value change difference between the frequency points is not equal intervals, which makes sometimes there is a large error at some frequency points that are not directly calibrated

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