Self-adaptive frequency point correcting wireless remote-control device

Abstract

The invention relates to a self-adaptive frequency point correcting wireless remote-control device which comprises an emitting module and a receiving module. The self-adaptive frequency point correcting wireless remote-control device is characterized in that the emitting module and the receiving module do not work simultaneously, wherein on-off states of the emitting module and the receiving module are controlled through a first shift switch controlled by a micro processor, and the first shift switch is connected with a band-pass filter; the emitting module consists of a modulating circuit, a first field tube circuit and a Doppler frequency-shift correcting circuit; the receiving module consists of a standard local oscillator module as well as a power divider, a first mixer, a medium-frequency amplifying filter circuit, a demodulating circuit and a second field tube circuit which are sequentially connected; the power divider is also connected with the Doppler frequency-shift correcting circuit; and the first shift switch is separately connected with the modulating circuit of the emitting module and the power divider of the receiving module. The device can overcome influences of Doppler frequency-shift, and automatically compensates frequency deviation, so that a transceiver circuit is always kept to communicate on the same precise frequency, and therefore, signal quality of a wireless remote-control system is greatly improved.

Description

technical field [0001] The invention relates to an adaptive frequency point correction wireless remote control device. Background technique [0002] For high-speed moving wireless remote control targets, such as remote-controlled flying models, remote-controlled drones, etc., due to their high speed, there is a "Doppler frequency drift effect" when the radio signal reaches the receiving antenna, that is, The frequency point of the signal will drift, which directly affects the quality of the wireless signal. [0003] In the current wireless remote control system on the market, in order to achieve higher wireless signal quality and longer wireless remote control distance, the common practice is: ① increase the transmission power of the wireless remote control device; ② improve the antenna of the wireless remote control device. But these two methods have great limitations: ① For the transmission power of the wireless remote control device, the National Radio Regulatory Commiss...

AI Technical Summary

Problems solved by technology

But these two methods have great limitations: ① For the transmission power of the wireless remote control device, the National Radio Regulatory Commission has clear regulations. Excessive transmission power is a violation, so the transmission power can only reach the legal limit at most. Allowed upper range

[0004] To sum up, if the transmission power and antenna have reached the upper limit, the wireless remote control system on the market has basically reached the upper limit of performance.

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