Transmitter output power control method and device and transmitter

Abstract

The invention relates to a transmitter power output control method and device and a transmitter. The method comprises a table writing process and a table look-up process. The table writing process comprises the following steps: setting a transmitter to output at first output power; adjusting the second environment temperature, and obtaining corresponding second output power and second actual working temperature; grouping the second output power according to a preset unit power offset by taking the first output power as a reference to obtain a working temperature range of each group; and obtaining a first power offset of each group and obtaining a corresponding second power offset, and generating a relation table according to the working temperature range and the second power offset. The table look-up process comprises the following steps: acquiring a working temperature; obtaining a corresponding working temperature range and a second power offset from the relation table according to the working temperature, and obtaining a corresponding gain compensation value according to the second power offset; and adjusting the link gain of the transmitter according to the gain compensation value. By implementing the invention, the stable output power of the transmitter at different environment temperatures can be ensured.

Description

technical field [0001] The present invention relates to the technical field of transmitter power control, and more specifically relates to a transmitter output power control method, device and transmitter. Background technique [0002] At present, COFDM (Coded Orthogonal Frequency Division Multiplexing) communication technology has been widely used in the field of wireless image transmission, and it is a very practical communication transmission technology. Based on multi-carrier technology, COFDM modulates the transmission data onto multiple mutually orthogonal sub-carriers and sends them simultaneously. It has the advantages of high spectral efficiency, high transmission rate, strong resistance to multipath effects and frequency selective drop. [0003] With the development of science and technology, the demand for image transmission in application fields such as drones and robots is increasing, and the requirements are also getting higher and higher. Although there are m...

AI Technical Summary

Problems solved by technology

[0004] 1. The performance changes greatly under high and low temperature environment, the high temperature power is relatively small, the low temperature power is relatively large, and the fluctuation range is very large

[0005] 2. The video transmission equipment for drones and robots has low power amplifier efficiency, high heat generation, and poor product stability and consistency

[0006] 3. The operating temperature range of the equipment is small, which cannot meet the working temperature requirements of -40-60 degrees. The adjustable range of the output frequency of the equipment is too small, and the carrier-to-noise ratio is poor.

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