Signal transmission method and device

摘要

The present invention provides a signal transmission method and device. The device includes: a transmitting device, configured to transmit a first signal to an opposite terminal; and a receiving device, configured to receive a second signal transmitted by the opposite terminal, where a frequency of the first signal is different from a frequency of the second signal, and the frequency of the first signal and/or the frequency of the second signal are/is in a frequency band of visible light. The present invention resolves a problem in a related technology that poor reliability of uplink and downlink signal transmission is caused when signals of a same frequency are used for uplink and downlink transmission, and provides a beneficial effect of improving reliability of uplink and downlink signal transmission.

主权项

1. A signal transmission device, wherein the signal transmission device communicates with an opposite terminal, and comprises:
a transmitting device, configured to transmit a first signal to the opposite terminal; and a receiving device, configured to receive a second signal transmitted by the opposite terminal, wherein a frequency of the first signal is different from a frequency of the second signal, and the frequency of the first signal and/or the frequency of the second signal are/is in a frequency band of visible light; and the first signal is a visible light signal of a first color, the second signal is a visible light signal of a second color, and the first color and the second color are different; and the receiving device comprises: multiple optical-to-electrical converters, disposed in different angles and configured to receive the visible light signal of the second color transmitted by the opposite terminal; and a comparator, configured to compare average powers of visible light signals of the second color that are transmitted by the opposite terminal and received by the multiple optical-to-electrical converters, and configured to select a visible light signal of the second color with a largest average power and perform corresponding processing, so as to obtain an original signal transmitted by the opposite terminal.