Random addressing self-adapting frequency-hopping wireless microphone and receiving machine thereof

Abstract

Disclosed are a randomly addressing adaptive frequency-hopping wireless transmitter and the receiver thereof, which belong to short distance wireless communication audio-frequency transmitting and receiving device, and solve the discretional matching problem of the wireless transmitter and receiver and the inconvenience during the manufacturing of the manufactures. The transmitter of the invention includes a micro controller, a microphone, a volume tuning circuit, an audio signal process circuit, a signal mixing module, a frequency hopping sequence module, a radio frequency modulation and demodulation circuit and a radio frequency amplifying circuit; the transmitter also includes a random signal generation circuit, an address generation module and a pulse width modulation circuit. The receiver of the invention includes a radio frequency amplifying circuit, a radio frequency modulation and demodulation circuit, a frequency hopping sequence module, a signal separation module, audio signal recovery circuit, a volume tuning circuit, a micro controller and an audio amplifying circuit; the receiver also includes a pulse width modulation circuit and an address comparison module. The randomly addressing adaptive frequency-hopping wireless transmitter and the receiver of the invention realize the discretional matching of the transmitter and the receiver in large scale application without interference with other transmitters; meanwhile, the randomly addressing adaptive frequency-hopping wireless transmitter and the receiver of the invention bring convenience in manufacturing the same model wireless transmitter and receiver.

Description

technical field [0001] The invention belongs to a short-distance wireless communication audio transmitting and receiving device. Background technique [0002] Currently widely used wireless transmitting and receiving devices operate at very high frequency (VHF) to ultra high frequency (UHF) or microwave bands, and both the transmitter and the receiver modulate analog audio signals at the operating frequency. The operating frequency of most wireless microphone transmitters and receivers is fixed, and the user cannot change it by himself. Recently, several wireless microphone transmitters and receivers produced by many manufacturers have been set with several manually adjustable operating frequency points, which provide a lot of convenience for the management of wireless microphones in multimedia classrooms. However, the frequencies of the transmitter and receiver of the wireless microphone need to be artificially matched or staggered. In this way, if a large-scale classroom...

AI Technical Summary

Problems solved by technology

In this way, at the time of manufacture, the address of each set of digital wireless microphones is different, that is, the address of each set of digital wireless microphones is unique, and arbitrary pairing cannot be realized, thus limiting the large-scale use of this wireless microphone

Not only does it cause production management problems for manufacturers to produce different wireless microphones, but it still does not change the management inconvenience caused by traditional wireless microphones used in large-scale multimedia classrooms.

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