Digital demodulating super-regeneration wireless receiver
A wireless receiver, digital demodulation technology, applied in electrical components, transmission systems, etc., can solve the problem of detection circuit susceptible to interference code rate and other problems
Active Publication Date: 2015-06-10
SOUTHEAST UNIV +1
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[0006] Purpose of the invention: Aiming at the above-mentioned prior art, a digital demodulation super-regenerative wireless receiver is proposed to solve the problem that the traditional envelope detection circuit of the super-regenerative chip is susceptible to interference and the code rate is low
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[0014] The present invention will be further explained below in conjunction with the drawings.
[0015] Such as figure 2 As shown, a digital demodulation super-regenerative wireless receiver includes a receiving antenna, a low-noise amplifier, a super-regenerative oscillator, a extinguishing circuit, and a digital adjustment circuit. Among them, the receiving antenna, low noise amplifier, super regenerative oscillator and extinguishing circuit have the same structure as the traditional OOK self-extinguishing super regenerative wireless receiver; the digital adjustment circuit includes a frequency conversion circuit, a band pass filter, a voltage comparator and a single-chip microcomputer.
[0016] Among them, the frequency conversion circuit is used to perform difference frequency processing on the self-extinguishing signal output by the super-regenerative oscillator, which is specifically implemented by an exclusive OR gate. The self-extinguishing signal and the fundamental freq...
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The invention discloses a digital demodulating super-regeneration wireless receiver. The digital demodulating super-regeneration wireless receiver comprises a receiving antenna, a low-noise amplifier, a super-regeneration oscillator, a quenching circuit and a digital adjusting circuit, wherein the digital adjusting circuit comprises a frequency transformation circuit, a band-pass filter, a voltage comparator and a single-chip microcomputer. Compared with the wave detection and demodulating manner of the traditional super-regeneration wireless receiver, the digital demodulating super-regeneration wireless receiver has the advantages that the characteristic that the frequency of a self-quenching signal changes according to different input signals of the receiver is utilized to shape the quenching signal and then input to the single-chip microcomputer; the digital processing method is carried out to demodulate, and therefore, the problem of interference and low code rate of an analog envelope detection manner in the traditional OOK self-quenching super-regeneration wireless receiver can be effectively solved.
Description
Technical field [0001] The invention belongs to the technical field of wireless communication receivers, and specifically relates to a super-regenerative wireless receiver. Background technique [0002] The super-regenerative receiver is a device that relies on the change of the internal oscillator to identify the strength of the input signal. A typical super-regenerative receiver mainly consists of a receiving antenna, a low noise amplifier (LNA), and a super-regenerative oscillator. It consists of Super Regeneration Oscillator (SRO), envelope detection and demodulation circuit, and extinguishing signal generation circuit, such as figure 1 Shown. [0003] The core of the super-regenerative receiver is the super-regenerative oscillator. The super regenerative oscillator is actually an oscillator that works in an intermittent oscillation state, and the intermittent frequency is determined by the extinguishing signal. Such as figure 1 As shown, in the self-extinguishing super-regen...
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IPC IPC(8): H04B1/10H04B1/16
Inventor 徐建王志功江少达石咏柳韩婷婷孙峰王蓉王巍巍
Owner SOUTHEAST UNIV