CN101997556B - Superregenerative receiving device and method - Google Patents
Superregenerative receiving device and method Download PDFInfo
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- CN101997556B CN101997556B CN 200910194576 CN200910194576A CN101997556B CN 101997556 B CN101997556 B CN 101997556B CN 200910194576 CN200910194576 CN 200910194576 CN 200910194576 A CN200910194576 A CN 200910194576A CN 101997556 B CN101997556 B CN 101997556B
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Abstract
The invention provides a superregenerative receiving device. An extinguishing controller of the device detects that the amplitude of the acquired oscillating signal reaches the preset amplitude and outputs control signals respectively to an oscillator and a delayer. The oscillator adjusts the non-oscillating time according to the frequency of the received external signal output by an antenna and the control signals output by the extinguishing controller and outputs the oscillating signal of the natural frequency. The delayer adjusts the width of the delay signal according to the control signals output by the extinguishing controller. A time width-amplitude converter converts the width of the delay signal output by the delayer into the sawtooth signal corresponding to the amplitude and outputs the sawtooth signal to a peak detector. The peak detector detects the peak of the amplitude of the received sawtooth signal and outputs the high/low level indicating the amplitude of the sawtooth wave to a shaping circuit. The shaping circuit shapes and filters the received signal and outputs the digital signal. The invention also provides a superregenerative receiving method. The device and the method can improve the data transmission speed.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of ultra-regeneration receiving device and method.
Background technology
In the communications field, ultra-regeneration receiving device is mainly used in low-power consumption, and short distance is in the Wireless Data Transmission of low speed.Transmitter by its antenna with certain transmit frequency digital signal, the antenna reception in the ultra-regeneration receiving device to external signal be to contain and the mixed signal of transmitter with the noise signal of the signal of transmit frequency and other frequency.The frequency of oscillation of the oscillator of ultra-regeneration receiving device is identical with the carrier frequency of the emission of transmitter emission digital signal, and accelerate starting of oscillation when the frequency of the signal that receives when oscillator is identical with frequency of oscillation, the wave detector of ultra-regeneration receiving device is to the oscillator signal detection of oscillator output, output digit signals after low pass filter filtering again, this digital signal are the digital signal of the transmitter emission that obtains of ultra-regeneration receiving device decoding.
Fig. 1 is the schematic diagram of existing ultra-regeneration receiving device.As shown in Figure 1, existing ultra-regeneration receiving device comprises antenna 100, isolated amplifier 101, oscillator 102, clock generator 103, current controller 104, wave detector 105, low pass filter 106 and comparator 107.The operation principle of existing ultra-regeneration receiving device is: the external signal that ultra-regeneration receiving device receives is to contain transmitter with the mixed signal of the digital signal of transmit frequency and other frequency noise signal; The clock signal of clock generator 103 output fixed frequencies is to current controller 104, and current controller 104 control generators 102 start and extinguish; Antenna 100 exports the external signal that receives to isolated amplifier 101; Isolated amplifier 101 exports oscillator 102 to after the external signal isolation that receives is amplified; Oscillator 102 is accelerated starting of oscillation after receiving the frequency external signal identical with frequency of oscillation, and outputting oscillation signal is to wave detector 105; Signal after the detection of wave detector 105 outputs inputs to comparator 107 after low pass filter 106 filtering; 107 couples of filtering results of comparator carry out level and just compare output digit signals.When oscillator 102 receives the frequency external signal identical with frequency of oscillation, the Induction Peried of oscillator 102 shortens than the Induction Peried that receives the frequency external signal not identical with frequency of oscillation, high level in the envelope of oscillator signal after detection of oscillator 102 outputs broadens, DC level after the low-pass filtering is also just higher, comparator 107 compares the amplitude of the signal after the above-mentioned two situations low-pass filtering, obtains the digital signal of transmitter emission.
The cycle of oscillator 102 comprises Induction Peried, duration of oscillation and fall time, and the cycle of ultra-regeneration receiving device is identical with the cycle of oscillator 102.
In the existing ultra-regeneration receiving device, the time width that is actually the oscillator signal that oscillator 102 under the frequency of the time width of the oscillator signal of oscillator 102 outputs under the frequency of external signal and the frequency of oscillation equal state and external signal and the frequency of oscillation different conditions is exported compares, particularly, the signal that the oscillator signal of different time width is in above-mentioned two situations obtained after detection and filtering carries out amplitude relatively, to obtain the digital signal of the relative length of expression time width.When the time width difference of oscillator signal under the frequency of the time width of oscillator signal under the frequency of external signal and the frequency of oscillation equal state and external signal and the frequency of oscillation different conditions was not obvious, low pass filter 106 and the comparator 107 depended merely in the existing ultra-regeneration receiving device can't carry out efficient decoding to external input signal within limited cycle.Adopt existing ultra-regeneration receiving device that the external signal that receives is decoded, receive stable data and generally need contain cycle more than 20, and the constant period of existing ultra-regeneration receiving device is constant in the receive data process, and this has just caused the data transmission bauds of receiving system lower.
Summary of the invention
In view of this, the invention provides a kind of ultra-regeneration receiving device, this device can improve data transmission bauds.
The present invention also provides a kind of superregenrative reception method, and the method can improve data transmission bauds.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of ultra-regeneration receiving device, this device comprises: antenna, oscillator, extinguish controller, delayer, the time wide-amplitude converter, peak detector and shaping circuit;
The described amplitude of extinguishing the oscillator signal of controller detection acquisition reaches the amplitude that sets in advance, and outputs control signals to respectively oscillator and delayer;
Described oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of the antenna output that receives with the control signal of extinguishing controller output, and the oscillator signal of output natural frequency;
Described delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output;
Wide when described-amplitude converter is converted to the sawtooth signal of corresponding amplitude with the time delayed signal width of delayer output, and exports peak detector to;
Described peak detector carries out peak detection to the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit;
Described shaping circuit carries out shaping filter and output digit signals to the high-low level that receives.
Preferably, described oscillator and described extinguishing further comprise envelope detector between the controller;
Described envelope detector carries out envelope detection to the oscillator signal of oscillator output, and the envelope signal of output expression oscillator signal amplitude is to the described controller that extinguishes;
After the described envelope signal that extinguishes the expression oscillator signal amplitude of controller detection acquisition reaches the amplitude that sets in advance, output control signals to respectively oscillator and delayer.
In the said apparatus, described oscillator comprises with the control signal adjustment non-oscillatory time of extinguishing controller output according to the frequency of the external signal of the antenna output that receives: described oscillator receives the rising edge starting of oscillation of extinguishing controller output, receive the trailing edge that extinguishes controller output and extinguish, the oscillator signal of output natural frequency during vibration; The frequency of the external signal of the antenna output that oscillator receives equals frequency of oscillation, shortens the non-oscillatory time;
Described delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output and comprised: described delayer receives the trailing edge output low level of extinguishing controller output, and output is fixedly exported high level after the low level of duration;
Described time delayed signal width is the time width of high level signal in the one-period;
The cycle of described delayer is the time sum of the high level signal of time of low level signal of delayer output and output.
In the said apparatus, the sawtooth signal that the time delayed signal width that wide when described-amplitude converter is exported delayer is converted to corresponding amplitude comprises:
Wide when described-amplitude converter receives the rising edge output sawtooth signal of delayer output, receives the trailing edge output low level of delayer output;
The amplitude of the sawtooth signal of wide when described-amplitude converter output is directly proportional with the time delayed signal width of delayer output.
In the said apparatus, described oscillator is the SAW oscillator; Described shaping circuit is inverter or negative circuit.
A kind of superregenrative reception method, the method comprises:
Extinguish controller and reach the amplitude that sets in advance according to the amplitude of the oscillator signal that receives, output control signals to respectively oscillator and delayer;
Oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of antenna output and the control signal of extinguishing controller output, and the oscillator signal of output natural frequency;
Delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output;
The time wide-amplitude converter the time delayed signal width of delayer output is converted to the sawtooth signal of corresponding amplitude, and the output sawtooth signal is to peak detector;
Peak detector carries out peak detection to the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit;
Shaping circuit carries out shaping filter and output digit signals to the high-low level that receives.
Preferably, the described controller that extinguishes further comprises according to the vibration of the amplitude control generator of the oscillator signal that receives and the time delayed signal width of delayer output before:
Envelope detector carries out envelope detection to the oscillator signal of oscillator output, and the envelope signal of output expression oscillator signal amplitude is to extinguishing controller;
Extinguish controller according to the time delayed signal width of vibration and the delayer output of the envelope signal control generator of the expression oscillator signal amplitude that receives.
In the said method, described oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of antenna output and the control signal of extinguishing controller output and comprised: oscillator receives the trailing edge that extinguishes controller output and extinguishes, receive the rising edge starting of oscillation of extinguishing controller output, the oscillator signal of output natural frequency during vibration; The frequency that oscillator receives the external signal of antenna output equals the frequency of oscillation of oscillator, and oscillator shortens the non-oscillatory time;
Described delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output and comprised: delayer receives the trailing edge output low level of extinguishing controller output, and output is fixedly exported high level after the low level of duration;
Described time delayed signal width is the time width of high level signal in the one-period;
The cycle of described delayer is the time sum of the high level signal of time of low level signal of delayer output and output.
In the said method, the sawtooth signal that the time delayed signal width that wide when described-amplitude converter is exported delayer is converted to corresponding amplitude comprises:
The time wide-amplitude converter receive the rising edge output sawtooth signal of delayer output, receive the trailing edge output low level of delayer output; The time wide-amplitude converter output the amplitude of sawtooth signal be directly proportional with the time delayed signal width that delayer is exported.
In the said method, it is that described shaping circuit carries out inversion operation to the high-low level that receives that described shaping circuit carries out shaping filter to the high-low level that receives.
As seen from the above technical solutions, the invention provides a kind of ultra-regeneration receiving device, the amplitude of the oscillator signal that extinguishes controller detection acquisition of this device reaches the amplitude that sets in advance, and outputs control signals to respectively oscillator and delayer; Oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of the antenna output that receives with the control signal of extinguishing controller output, and the oscillator signal of output natural frequency; Delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output; The time wide-amplitude converter the time delayed signal width of delayer output is converted to the sawtooth signal of corresponding amplitude, and export peak detector to; Peak detector carries out peak detection to the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit; Shaping circuit carries out shaping filter and output digit signals to the high-low level that receives.
The present invention also provides a kind of superregenrative reception method, extinguishes controller in the method and reaches the amplitude that sets in advance according to the amplitude of the oscillator signal that receives, outputs control signals to respectively oscillator and delayer; Oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of antenna output and the control signal of extinguishing controller output; Delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output; The time wide-amplitude converter the time delayed signal width of delayer output is converted to the sawtooth signal of corresponding amplitude, the output sawtooth signal is to peak detector; Peak detector carries out peak detection to the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit; High-low level shaping filter and the output digit signals of shaping circuit to receiving.
Adopt device and method disclosed by the invention, extinguish the duration of oscillation of the amplitude control generator of the oscillator signal that controller can be by detecting oscillator output, in the situation that oscillator shortens Induction Peried T2, the duration of oscillation T3 that extinguishes the amplitude control generator that controller can be by oscillator signal is constant, therefore, the whole cycle time T of extinguishing shortens, and has improved data transmission bauds; The time delayed signal of delayer output increased outside have under the signal input state and outside no signal input state under the time wide difference of high level in the time delayed signal, improved the difference of the duty ratio of output time delayed signal, wide when being conducive to improve-amplitude converter according to the time bandwidth signals sawtooth signal amplitude that converts to difference, can effectively decode to the received signal, improve data transmission bauds.
Description of drawings
Fig. 1 is the structural representation of existing ultra-regeneration receiving device.
Fig. 2 is the structural representation of ultra-regeneration receiving device of the present invention.
Fig. 3 is the signal response schematic diagram of ultra-regeneration receiving device of the present invention.
Fig. 4 is the flow chart of superregenrative reception method of the present invention.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The invention provides a kind of ultra-regeneration receiving device, the amplitude of the oscillator signal that extinguishes controller detection acquisition of this device reaches the amplitude that sets in advance, and outputs control signals to respectively oscillator and delayer; Oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of the antenna output that receives with the control signal of extinguishing controller output, and the oscillator signal of output natural frequency; Delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output; The time wide-amplitude converter the time delayed signal width of delayer output is converted to the sawtooth signal of corresponding amplitude, and export peak detector to; Peak detector carries out peak detection to the amplitude of the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit; Shaping circuit carries out shaping filter and output digit signals to the high-low level that receives.
The present invention also provides a kind of superregenrative reception method, extinguishes controller in the method and reaches the amplitude that sets in advance according to the amplitude of the oscillator signal that receives, outputs control signals to respectively oscillator and delayer; Oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of antenna output and the control signal of extinguishing controller output; Delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output; The time wide-amplitude converter the time delayed signal width of delayer output is converted to the sawtooth signal of corresponding amplitude, and export peak detector to; Peak detector carries out peak detection to the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit; High-low level shaping filter and the output digit signals of shaping circuit to receiving.
Fig. 2 is the structural representation of ultra-regeneration receiving device of the present invention, and Fig. 3 is the signal response schematic diagram of ultra-regeneration receiving device of the present invention.Now in conjunction with Fig. 2 and Fig. 3, ultra-regeneration receiving device of the present invention is described, specific as follows:
Oscillator in the ultra-regeneration receiving device of the present invention adopts surface acoustic wave (Surface AcousticWave, SAW) oscillator 201, also can adopt other the oscillator with upper frequency stability.
A kind of ultra-regeneration receiving device of the present invention comprises: antenna 200, SAW oscillator 201, envelope detector 202, extinguish controller 203, delayer 204, the time wide-amplitude converter 205, peak detector 206 and shaping circuit 207.
For sake of clarity, define the existing cycle of oscillation of extinguishing to SAW oscillator 201: as shown in Figure 3, the cycle of oscillation T of extinguishing of SAW oscillator 201 comprises fall time T1, Induction Peried T2 and duration of oscillation T3.The non-oscillatory time of the present invention is fall time T1 and Induction Peried T2 sum.
The external signal that antenna 200 receives is to comprise transmitter with the mixed signal of the noise signal of the signal of certain transmit frequency and other frequency, perhaps only comprises the noise signal of other frequency.For sake of clarity, the situation that the external signal that now antenna 200 is received only comprises the noise signal of other frequency is defined as outside no signal input state, and the external signal that antenna 200 is received is to comprise transmitter to be defined as the outside with the situation of the mixed signal of the noise signal of the signal of certain transmit frequency and other frequency the signal input state is arranged.
SAW oscillator 201 is adjusted the non-oscillatory time according to the frequency of the external signal of antenna 200 outputs with the control signal of extinguishing controller 203 outputs, and the oscillator signal of output natural frequency is to envelope detector 202.SAW oscillator 201 is in intermittent oscillatory regime according to the pulse width signal that extinguishes controller 203 outputs, and output pure oscillation signal is to envelope detector 202.SAW oscillator 201 receives the trailing edge that extinguishes controller 203 outputs and extinguishes, and receives the rising edge that extinguishes controller 203 outputs and enters oscillatory regime by Induction Peried T2, and the pure oscillation signal of output natural frequency is to envelope detector 202 during vibration.The frequency dependence of the Induction Peried T2 of SAW oscillator 201 and the external signal that receives; When outside no signal input, the frequency of the external signal of antenna 200 outputs that SAW oscillator 201 receives is not equal to the frequency of oscillation of SAW oscillator 201, and the Induction Peried T2 of SAW oscillator 201 is longer; When there was the signal input outside, the frequency of the external signal of antenna 200 outputs that SAW oscillator 201 receives equaled the frequency of oscillation of SAW oscillator 201, and SAW oscillator 201 shortens Induction Peried T2.SAW oscillator 201 Induction Peried T2 are also relevant with the power of external signal after the amplification of antenna 200 output; In the frequency of the external signal that SAW oscillator 201 the receives situation identical with frequency of oscillation, the power of the external input signal after the amplification of antenna 200 outputs that SAW oscillator 201 receives is larger, and the Induction Peried T2 of SAW oscillator 201 is shorter.The frequency of the oscillator signal of SAW oscillator 201 outputs is the natural frequency of SAW oscillator 201, and this natural frequency is directly proportional with frequency of oscillation.
The amplitude of 202 pairs of oscillator signals that receive of envelope detector is carried out envelope detection, and the envelope signal of output expression oscillator signal amplitude is to extinguishing controller 203.
The amplitude of envelope signal of extinguishing the expression oscillator signal amplitude of controller 203 detected envelope wave detectors 202 output reaches default amplitude, output control signals to SAW oscillator 201 and delayer 204, adjust the time delayed signal width with vibration and the delayer 204 of control SAW oscillator 201.The control signal of extinguishing controller 203 output is pulse width signal, and the cycle of oscillation T of extinguishing of the cycle of pulse width signal and SAW oscillator 201 equates.When the amplitude of extinguishing controller 203 and detect the signal of envelope detector 202 output reaches preset value, extinguish controller 203 and export respectively trailing edge to SAW oscillator 201 and delayer 204, control SAW oscillator 201 extinguishes, control delayer 204 output low levels.Above-mentioned preset value is the amplitude of the oscillator signal that sets in advance, the maximum amplitude of this preset value oscillator signal of oscillator output during less than or equal to outside no signal input.
The time delayed signal width is the time width T5 of high level in the one-period in the time delayed signal of delayer 204 output.
The time wide-amplitude converter 205 the time delayed signal width of delayer 204 output be converted to sawtooth signal export peak detector 206 to.The time wide-amplitude converter 205 output sawtooth signal when receiving the rising of delayer 204 output, output low level when receiving the trailing edge of delayer 204 outputs.The time wide-amplitude converter 205 output the amplitude of sawtooth signal be directly proportional with the time delayed signal width that delayer 204 is exported, namely be directly proportional with the time width T5 of high level in the time delayed signal.
The amplitude of 206 pairs of sawtooth signals of peak detector is carried out peak detection, and the high-low level of output expression sawtooth signal amplitude is to shaping circuit 207.
Export behind the signal shaping and filtering of shaping circuit 207 with peak detector 206 outputs.Shaping circuit 207 of the present invention is inverter or negative circuit, and the high-low level that peak detector 206 is exported carries out inversion operation, output digit signals.
When the input of outside no signal, the external signal frequency that antenna 200 exports SAW oscillator 201 to is not equal to the frequency of oscillation of SAW oscillator 201; SAW oscillator 201 receive extinguish controller 203 rising edge by Induction Peried T2 after starting oscillation, output pure oscillation signal is to envelope detector 202 in oscillatory process; Extinguish the amplitude of envelope signal that controller 203 receives the expression oscillator signal amplitude of envelope detector 202 output and reach preset value, export respectively trailing edge to SAW oscillator 201 and delayer 204, SAW oscillator 201 extinguishes according to the trailing edge that receives, delayer 204 according to the trailing edge output time delayed signal that receives to the time wide-amplitude converter 205; The time wide-amplitude converter 205 the time width T5 of the high level signal in the time delayed signal that receives be converted to sawtooth signal export peak detector 206 to, 206 pairs of peak detectors receive to such an extent that the amplitude of sawtooth signal is carried out peak detection, and the output high level signal is to shaping circuit 207; Shaping circuit 207 carries out inversion operation to the received signal, the low level digital signal of output expression.
When there is the signal input outside, antenna 200 exports in the external signal of SAW oscillator 201 and contains the frequency signal identical with the frequency of oscillation of SAW oscillator 201, contains transmitter with the signal of certain transmit frequency in the signal of namely antenna 200 outputs; SAW oscillator 201 shortens Induction Peried T2 after receiving signal with self-oscillation frequency same frequency, enters fast oscillatory process, and output pure oscillation signal is to envelope detector 202; Extinguish the amplitude that controller 203 receives the envelope signal of envelope detector 202 output and reach preset value, the output trailing edge makes 201 failures of oscillations of SAW oscillator to SAW oscillator 201.At this moment, the duration of oscillation of SAW oscillator 201 is extinguished the trailing edge of controller 203 outputs to be controlled, and the duration of oscillation T3 of the SAW oscillator 201 during with outside no signal input is identical.When extinguishing controller 203 output trailing edges to SAW oscillator 201, the output trailing edge is to delayer 204; The time width T5 of the high level signal in the time delayed signal is shortened in the control that delayer 204 is extinguished the trailing edge of controller 203 output; The time wide-amplitude that 205 pairs of time delayed signal width of amplitude converter are changed the sawtooth signal of rear acquisition reduce; 206 pairs of peak detectors receive to such an extent that the amplitude of sawtooth signal is carried out peak detection, and the output low level signal is to shaping circuit 207; Shaping circuit 207 carries out inversion operation to the received signal, the digital signal of output expression high level.The digital signal of shaping circuit 207 shapings output is the digital signal that demodulates, the digital signal of the namely transmitter transmission that receives of antenna 200.
Fig. 3 is the signal response schematic diagram of ultra-regeneration receiving device of the present invention, and Fig. 4 is the flow chart of superregenrative reception method of the present invention.Now in conjunction with Fig. 3 and Fig. 4, superregenrative reception method of the present invention is described, specific as follows:
Step 401: the frequency according to external input signal is adjusted the non-oscillatory time, and controls duration of oscillation according to the amplitude of oscillator signal;
The cycle of oscillation T of extinguishing of SAW oscillator 201 comprises fall time T1, Induction Peried T2 and duration of oscillation T3.In an embodiment of the present invention, the fall time T1 of SAW oscillator 201 is constant; The non-oscillatory time of SAW oscillator 201 is fall time T1 and Induction Peried T2 sum; The duration of oscillation of SAW oscillator 201 is T3.
External signal frequency dependence after the amplification of SAW oscillator 201 Induction Peried T2 and antenna 200 outputs, when containing the frequency signal identical with frequency of oscillation in the external signal that SAW oscillator 201 receives, SAW oscillator 201 shortening Induction Peried T2; When the external signal that receives when SAW oscillator 201 did not contain the frequency signal identical with frequency of oscillation, the Induction Peried T2 of SAW oscillator 201 was constant.SAW oscillator 201 Induction Peried T2 are also relevant with the power of external signal after the amplification of antenna 200 output; In the frequency of the external signal that SAW oscillator 201 the receives situation identical with frequency of oscillation, the power of the external input signal after the amplification of antenna 200 outputs that SAW oscillator 201 receives is larger, and the Induction Peried T2 of SAW oscillator 201 is shorter.The oscillator signal of SAW oscillator 201 output natural frequency when vibration is to envelope detector 202.The frequency of the oscillator signal of SAW oscillator 201 outputs is the natural frequency of SAW oscillator 201, and this natural frequency is directly proportional with frequency of oscillation.
Extinguish controller 203 detect receive the amplitude of pure oscillation signal or the amplitude that detects the envelope signal of expression oscillator signal amplitude when reaching preset value, the output trailing edge is to SAW oscillator 201, with 201 failures of oscillations of control SAW oscillator.Externally have under the signal input state and outside no signal input state under, SAW oscillator 201 is extinguished the control of controller 203, duration of oscillation all is T3.Therefore, compare with situation about inputting without external signal, when the external signal input was arranged, SAW oscillator 201 had shortened Induction Peried T2, and then has shortened and extinguished duration of oscillation T.
Step 402: according to the amplitude control time delayed signal width of oscillator signal;
Extinguish controller 203 according to the amplitude of the oscillator signal of SAW oscillator 201 output or according to the time delayed signal width of envelope control delayer 204 outputs of the expression oscillator signal amplitude of envelope detector 202 outputs.
When extinguishing amplitude that controller 203 detects the envelope signal of the amplitude of the oscillator signal that receives or expression oscillator signal amplitude and reaching preset value, the output trailing edge is to delayer 204; Delayer 204 receives output low level behind the trailing edge that extinguishes controller 203 output.The cycle of time delayed signal and SAW oscillator 201 to extinguish cycle of oscillation T identical, and the low level time width T4 in the time delayed signal immobilizes, the high level time width in the time delayed signal is T-T4.
The duty ratio of time delayed signal is the time of high level in the interior time delayed signal of one-period and the ratio in cycle.
Compare with the situation of outside no signal input, when there is the signal input outside, the cycle of oscillation T of extinguishing of SAW oscillator 201 is extinguished controller 203 control and is shortened, and the cycle of the time delayed signal of delayer 204 output is with to extinguish cycle of oscillation T identical, low level signal T4 in the time delayed signal immobilizes, therefore, the time width of the high level signal in the time delayed signal of output is shortened in the delayer 204 trailing edge control of being extinguished controller 203 output.
Step 403: the sawtooth signal that the time delayed signal width is converted to corresponding amplitude;
The time wide-amplitude converter 205 the time delayed signal width of delayer 204 output is converted to the sawtooth signal of corresponding amplitude.The time after wide-amplitude converter 205 receives the rising edge of delayer 204 output, the output sawtooth signal, receive the trailing edge of delayer 204 outputs after, stop output signal; The signal of wide in the time of at this moment ,-amplitude converter 205 outputs is the sawtooth signal of high level signal width in the time delayed signal of expression delayer 204 outputs; The amplitude of sawtooth signal is directly proportional with the time delayed signal width, namely is directly proportional with the time width of high level signal in the time delayed signal.
Compare with the situation of outside no signal input, when there was the signal input outside, the time width of the high level signal of the time delayed signal of delayer 204 outputs shortened, the time wide-amplitude converter 205 outputs the amplitude of sawtooth signal reduce.
Step 404: sawtooth signal is carried out peak detection;
The amplitude of the sawtooth signal of wide during 206 pairs of peak detectors-amplitude converter 205 outputs is carried out peak detection; When the input of outside no signal, the time wide-amplitude converter 205 outputs the amplitude of sawtooth signal larger, peak detector 206 output high level; When there is signal when input the outside, the time wide-amplitude converter 205 outputs the amplitude of sawtooth signal reduce peak detector 206 output low levels.
Step 405: the signal shaping and filtering behind the peak detection is obtained digital signal and output;
Signal after the detection of 207 pairs of peak detectors of shaping circuit, 206 outputs carries out shaping filter, obtains digital signal; Particularly, the signal after 207 pairs of detections that receive of shaping circuit carries out inversion operation, and high level is converted to low level signal, and low level signal is converted to high level signal.
When outside no signal input, shaping circuit 207 is converted to low level digital signal output with the high level of peak detector 206 outputs; When there was the signal input outside, shaping circuit 207 was high level digital signal output with the low transition of peak detector 206 outputs.High level digital signal of the present invention is digital signal 1, and low level digital signal is digital signaling zero.
Step 406: finish.
In the above-mentioned preferred embodiment of the present invention, externally have in the situation of signal input, SAW oscillator 201 shortens Induction Peried T2, whether the signal that the expression oscillator signal amplitude of controller 203 detection acquisitions is extinguished in utilization reaches preset value, the duration of oscillation T3 of control SAW oscillator 201 remains unchanged, and then shorten SAW oscillator 201 extinguish T cycle of oscillation, and can realize transmitting that each data need to contain extinguishes the cycle of oscillation number and reduce, greatly improved data transmission bauds.
In the above-mentioned preferred embodiment of the present invention, utilize the time delayed signal of delayer 204 output increased outside have under the signal input state and outside no signal input state under the difference of high level in the time delayed signal, improved the difference of the duty ratio of output time delayed signal, wide when being conducive to improve-amplitude converter 205 according to the time bandwidth signals sawtooth waveforms that converts to the difference of amplitude, can effectively decode to the received signal, solve decoding difficulty and the lower problem of message transmission rate that the prior art peripheral has the time width difference of signal under signal input and the no signal input state not cause very much.
The oscillator 102 of existing ultra-regeneration receiving device adopts the LC oscillator usually, and the frequency stability of LC oscillator is not high, needs the manufal tuning frequency, and artificial frequency modulation can have a strong impact on reception and the operating efficiency of ultra-regeneration receiving device.In the above-mentioned preferred embodiment of the present invention, the SAW oscillator 201 that employing has a high frequency stability has substituted the LC oscillator in the existing ultra-regeneration receiving device, avoided the manufal tuning frequency, improved the operating efficiency of receiving system, because the frequency stability of SAW oscillator 201 is higher, the decoding quality of wide when being conducive to improve-amplitude converter 205 and peak detector 206.
In sum, above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. ultra-regeneration receiving device, this device comprises: antenna, oscillator, extinguish controller, delayer, the time wide-amplitude converter, peak detector and shaping circuit;
The described amplitude of extinguishing the oscillator signal of controller detection acquisition reaches the amplitude that sets in advance, and outputs control signals to respectively oscillator and delayer;
Described oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of the antenna output that receives with the control signal of extinguishing controller output, and the oscillator signal of output natural frequency;
Described delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output;
Wide when described-amplitude converter is converted to the sawtooth signal of corresponding amplitude with the time delayed signal width of delayer output, and exports peak detector to;
Described peak detector carries out peak detection to the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit;
Described shaping circuit carries out shaping filter and output digit signals to the high-low level that receives.
2. device according to claim 1 is characterized in that, described oscillator and described extinguishing further comprise envelope detector between the controller;
Described envelope detector carries out envelope detection to the oscillator signal of oscillator output, and the envelope signal of output expression oscillator signal amplitude is to the described controller that extinguishes;
After the described envelope signal that extinguishes the expression oscillator signal amplitude of controller detection acquisition reaches the amplitude that sets in advance, output control signals to respectively oscillator and delayer.
3. device according to claim 1 and 2 is characterized in that,
Described oscillator comprises with the control signal adjustment non-oscillatory time of extinguishing controller output according to the frequency of the external signal of the antenna output that receives: described oscillator receives the rising edge starting of oscillation of extinguishing controller output, receive the trailing edge that extinguishes controller output and extinguish, the oscillator signal of output natural frequency during vibration; When the frequency of the external signal of the antenna output that oscillator receives equals frequency of oscillation, shorten the non-oscillatory time;
Described delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output and comprised: described delayer receives the trailing edge output low level of extinguishing controller output, and output is fixedly exported high level after the low level of duration;
Described time delayed signal width is the time width of high level signal in the one-period;
The cycle of described delayer is the time sum of the high level signal of time of low level signal of delayer output and output.
4. device according to claim 1 and 2 is characterized in that, the sawtooth signal that the time delayed signal width that wide when described-amplitude converter is exported delayer is converted to corresponding amplitude comprises:
Wide when described-amplitude converter receives the rising edge output sawtooth signal of delayer output, receives the trailing edge output low level of delayer output;
The amplitude of the sawtooth signal of wide when described-amplitude converter output is directly proportional with the time delayed signal width of delayer output.
5. device according to claim 1 and 2 is characterized in that,
Described oscillator is surface acoustic wave SAW oscillator;
Described shaping circuit is inverter or negative circuit.
6. superregenrative reception method, the method comprises:
Extinguish controller and reach the amplitude that sets in advance according to the amplitude of the oscillator signal that receives, output control signals to respectively oscillator and delayer;
Oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of antenna output and the control signal of extinguishing controller output, and the oscillator signal of output natural frequency;
Delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output;
The time wide-amplitude converter the time delayed signal width of delayer output is converted to the sawtooth signal of corresponding amplitude, and the output sawtooth signal is to peak detector;
Peak detector carries out peak detection to the sawtooth signal that receives, and the high-low level of output expression sawtooth waveforms amplitude is to shaping circuit;
Shaping circuit carries out shaping filter and output digit signals to the high-low level that receives.
7. method according to claim 6 is characterized in that, the described controller that extinguishes further comprises according to the vibration of the amplitude control generator of the oscillator signal that receives and the time delayed signal width of delayer output before:
Envelope detector carries out envelope detection to the oscillator signal of oscillator output, and the envelope signal of output expression oscillator signal amplitude is to extinguishing controller;
Extinguish controller according to the time delayed signal width of vibration and the delayer output of the envelope signal control generator of the expression oscillator signal amplitude that receives.
8. according to claim 6 or 7 described methods, it is characterized in that,
Described oscillator is adjusted the non-oscillatory time according to the frequency of the external signal of antenna output and the control signal of extinguishing controller output and comprised: oscillator receives the trailing edge that extinguishes controller output and extinguishes, receive the rising edge starting of oscillation of extinguishing controller output, the oscillator signal of output natural frequency during vibration; When the frequency that oscillator receives the external signal of antenna output equaled the frequency of oscillation of oscillator, oscillator shortened the non-oscillatory time;
Described delayer is adjusted the time delayed signal width according to the control signal of extinguishing controller output and comprised: delayer receives the trailing edge output low level of extinguishing controller output, and output is fixedly exported high level after the low level of duration;
Described time delayed signal width is the time width of high level signal in the one-period;
The cycle of described delayer is the time sum of the high level signal of time of low level signal of delayer output and output.
9. according to claim 6 or 7 described methods, its feature is lain in, and wide when described-amplitude converter comprises the sawtooth signal that the time delayed signal width of delayer output is converted to corresponding amplitude:
The time wide-amplitude converter receive the rising edge output sawtooth signal of delayer output, receive the trailing edge output low level of delayer output; The time wide-amplitude converter output the amplitude of sawtooth signal be directly proportional with the time delayed signal width that delayer is exported.
10. according to claim 6 or 7 described methods, it is characterized in that,
It is that described shaping circuit carries out inversion operation to the high-low level that receives that described shaping circuit carries out shaping filter to the high-low level that receives.
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| CN104617929B (en) * | 2014-12-26 | 2017-12-19 | 矽力杰半导体技术(杭州)有限公司 | Detection of data signal circuit, method and contactless power supply device |
| CN104702303B (en) * | 2015-02-15 | 2017-03-22 | 东南大学 | Digital demodulating super-regeneration wireless receiver |
| CN107370695B (en) * | 2016-05-11 | 2023-10-03 | 浙江诺尔康神经电子科技股份有限公司 | Artificial cochlea radio frequency detection method and system based on delay suppression |
| CN113327412B (en) * | 2021-08-04 | 2021-11-16 | 深圳宇凡微电子有限公司 | Wireless signal decoding method, device, equipment and system |
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