Latent communication system and method based on non-cooperative blind source signal

A communication system and non-cooperative technology, applied in the field of passive communication methods, can solve the problems of one-to-one communication with limited number of communication terminals, limited communication capacity and communication distance, and difficulty in achieving passive passive communication between transmitters and receivers. , to achieve the effect of saving carrier transmission power and improving the quality of wireless communication
CN110190923AActive Publication Date: 2019-08-30PEKING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PEKING UNIV
Publication Date
2019-08-30

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Abstract

The invention discloses a latent communication system and method based on a non-cooperative blind source. The latent communication system comprises an information coding and transmitting end, an information receiving and demodulating end and a non-cooperative blind source signal, a non-cooperative blind source is used as a communication carrier wave, double antennas or multiple antennas are used as receiving ends, received electromagnetic waves are demodulated in a receiver, and therefore hidden transmission and passive transmission communication of information are achieved. By adopting the technical scheme of the invention, a signal emission source is not needed, the carrier emission power is saved, and new spectrum resources are not occupied; the circuit structure is simplified, and thehardware cost is reduced; concealed communication is guaranteed in the physical level, and indoor directional fixed-point communication can be achieved. Information can be sent to a sensor at a specific position in the Internet of Things, energy is provided for the radio frequency identification tag, and the wireless communication quality is improved.
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Description

technical field

[0001] The present invention relates to the technical field of covert, passive, passive and latent communication, in particular to a latent communication system and method based on non-cooperative blind source signals. The ubiquitous Wi-Fi, Bluetooth, GPS and other electromagnetic signals are passive communication methods with carrier waves. Background technique

[0002] At present, in the field of wireless communication, the modulation and demodulation method used in the existing system needs to modulate the baseband signal onto the carrier. However, in order to increase the transmission rate and reduce the bit error rate, realize normal communication effect and improve communication quality, it is necessary to consider improving the signal-to-noise ratio of the system. There are currently three mainstream ways to improve the signal-to-noise ratio, increasing the carrier power and reducing the noise figure of the receiver, or using special modulation method...

Claims

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