CN106059683B - Pulse-modulated signal transmitting device and method, communication device and signal processing device - Google Patents
Pulse-modulated signal transmitting device and method, communication device and signal processing device Download PDFInfo
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- CN106059683B CN106059683B CN201610532883.XA CN201610532883A CN106059683B CN 106059683 B CN106059683 B CN 106059683B CN 201610532883 A CN201610532883 A CN 201610532883A CN 106059683 B CN106059683 B CN 106059683B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/005—Transmission systems in which the medium consists of the human body
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
- H04L27/2053—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using more than one carrier, e.g. carriers with different phases
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention relates to a signal transmission device, a signal transmission method, a communication device and a signal processing device. The signal transmission device comprises a pulse generating circuit, a modulator circuit and a signal selection circuit, wherein the input end of the pulse generating circuit is connected to a clock generator; the output end of the pulse generating circuit is connected to the input end of the modulator circuit; the two-channel output end of the modulator circuit is connected to the input end of the signal selection circuit; the control end of the signal selection circuit is connected to a signal generator; and the output end of the signal selection circuit is connected to a signal receiving device. The signal transmission device, the communication device and the signal processing device have the advantages of low power consumption and low complexity.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of pulse-modulated signal discharger, method, communication dress
Put and signal processing apparatus.
Background technology
In existing communication system, transmitter is generally using 2PSK (Phase Shift Keying, the phase of non-pulse formula
Move keying), 2ASK (Amplitude Shift Keying, amplitude shift keying), 2FSK (Frequency Shift Keying, frequency
Move keying) etc. signal modulation mode.By contrast, 2PSK has preferable bit error rate performance, but in 2PSK signal transmissions system
There is phase indeterminacy in system, and reverse, the generation error code of receiving symbol " 0 " and " 1 " will be caused.In order to keep 2PSK excellent
Point, reduces the bit error rate, and 2PSK modulation is improved to BDPSK binary differential phase shift keying modulation.2DPSK(Differential Phase
Shift Keying, differential phase keying (DPSK)) modulation technique has efficiency of transmission height, strong antijamming capability, performance of BER excellent
The advantage such as good.However, the existing 2DPSK communications for human body communication are based on narrowband modulation, system power dissipation is big, and complexity is high,
Drawbacks described above limits application of the 2DPSK modes in actual scene.
By taking the body area network applied environment such as human body communication as an example, human body medium's communication technology is generally that human body is made by one kind
For the Novel Communication mode that cable carries out data transmission, by the technology, human body will become a part for network, and people only need to
By touching the transmitting-receiving that just can enter row information.Under body area network applied environment, the volume of implanted equipment is particularly to Wearable
There is a strict restriction with power consumption, these defect great limitations of 2DPSK modes practicality of human body medium's communication system
And commercialization.
In sum, prior art power consumption is big, complexity is high.
The content of the invention
Based on this, it is necessary to for the problem that prior art power consumption is big, complexity is high, there is provided a kind of sender unit,
Method, communicator and signal processing apparatus.
Sender unit, including：
Pulse-generating circuit, modulation circuit and signal selecting circuit；
The input of the pulse-generating circuit is connected to clock generator, the outfan connection of the pulse-generating circuit
To the input of the modulation circuit, the signal that the doubleway output end of the modulation circuit is connected to the signal selecting circuit is defeated
Enter end, the control end of the signal selecting circuit is connected to signal generation apparatus, the outfan connection of the signal selecting circuit
To signal receiving device；
The pulse-generating circuit receives the clock signal that clock generator is produced, and is generated according to the clock signal narrow
Pulse clock signal, and by the narrow pulse clock signal output to the modulation circuit；
The modulation circuit carries out bi-phase modulated to the narrow pulse clock signal, obtains the first contrary each other tune of phase place
Signal processed and the second modulated signal, and by first modulated signal and the output of the second modulated signal to signal behavior electricity
Road；
The signal selecting circuit receives the base band relocatable code data that signal generation apparatus are produced, and relative in the base band
When code data are high level, select output first modulated signal to be launched, be low electricity in the base band relocatable code data
At ordinary times, output second modulated signal is selected to be launched.
A kind of signal transmitting method, comprises the following steps：
Clock signal is received, and narrow pulse clock signal is generated according to the clock signal；
Bi-phase modulated is carried out to the narrow pulse clock signal, phase place the first modulated signal and second contrary each other is obtained
Modulated signal；
Base band relocatable code data are received, and when the base band relocatable code data are high level, selects output described first
Modulated signal is launched, and when the base band relocatable code data are low level, selects output second modulated signal to carry out
Transmitting.
A kind of communicator, including：
Sender unit, first sensor, second sensor, and signal receiving device；
Signal selecting circuit in the sender unit is connected with the input of the first sensor, and described
The outfan of one sensor is connected by transmission medium with the input of the second sensor, the second sensor it is defeated
Go out end to be connected with the input of the signal receiving device；
The signal selecting circuit launches first modulated signal and the second modulated signal to the first sensor,
First modulated signal and the second modulated signal are loaded into signal transmission medium, second sensing by the first sensor
Device extracts first modulated signal and the second modulated signal from the signal transmission medium, and is transferred to the signal reception dress
Put.
A kind of signal processing apparatus, including：
Signal generation apparatus；
Communicator；And
Computer；
The outfan of the signal generation apparatus is connected with the input of the communicator, the communicator it is defeated
Go out end to be connected with the input of the computer.
Above-mentioned sender unit, method, communicator and signal processing apparatus, generate narrow arteries and veins by pulse-generating circuit
Clock signal is rushed, the first contrary each other modulated signal of phase place and the second modulated signal are obtained by modulation circuit, and by letter
Number selection circuit optionally exports first modulated signal and the second modulated signal, so as to produce 2DPSK signals, system work
Make in digital trigger-type state, there is low-power consumption, low complex degree in realization, so that the per bit energy of system
Consumption is significantly reduced, and apparatus structure is simple, and hardware cost is low.
Description of the drawings
Structural representations of the Fig. 1 for the sender unit of one embodiment；
Structural representations of the Fig. 2 for the modulation circuit of one embodiment；
Sequential charts of the Fig. 3 for system；
Sequential chart when Fig. 4 is the difference of the cycle and pulse width for being more than clock signal time delay；
Flow charts of the Fig. 5 for the signal transmitting method of one embodiment；
Structural representations of the Fig. 6 for the communicator of one embodiment；
Structural representations of the Fig. 7 for the signal processing apparatus of one embodiment.
Specific embodiment
Below in conjunction with the accompanying drawings the embodiment of the sender unit, communicator and signal processing apparatus of the present invention is carried out
Explanation.
Structural representations of the Fig. 1 for the sender unit 100 of one embodiment.As shown in figure 1, the signal transmitting dress
Putting 100 may include：
Pulse-generating circuit 10, modulation circuit 20 and signal selecting circuit 30；
The input of the pulse-generating circuit 10 is connected to clock generator 40, the output of the pulse-generating circuit 10
End is connected to the input of the modulation circuit 20, and the doubleway output end of the modulation circuit 20 is connected to the signal behavior electricity
The signal input part on road 30, the control end of the signal selecting circuit 30 are connected to signal generation apparatus 50, the signal behavior
The outfan of circuit 30 is connected to signal receiving device 60；
The pulse-generating circuit 10 receives the clock signal clk that clock generator 40 is produced, and is believed according to the clock
Number GLK generates narrow pulse clock signal GCLK, and by narrow pulse clock signal GCLK outputs to the modulation circuit 20；
The narrow pulse clock signal GCLK of the modulation circuit 20 pairs carries out bi-phase modulated, obtains phase place contrary each other
First modulated signal T0 and the second modulated signal T180, and first modulated signal T0 and the second modulated signal T180 are exported
To the signal selecting circuit 30；
The signal selecting circuit 30 receives base band relocatable code data D that signal generation apparatus 50 are produced, and in the base
When band relocatable code data D are high level, output first modulated signal T0 is selected to be launched, in the relative yardage of the base band
When being low level according to D, select output second modulated signal T180 to be launched, finally give transmission signal m (t).
The pulse-generating circuit 10 can be according to first modulated signal T0 and the frequency band of the second modulated signal T180
Pulse width G of narrow pulse clock signal GCLK described in width adjustment.
In one embodiment, the primary signal that signal generation apparatus 50 are produced is probably base band absolute code data B, if
Directly base band absolute code data B are input in subsequent conditioning circuit, final generation is 2BPSK signals.Therefore, it can in the letter
One change-over circuit 70 is set number between generating meanss 50 and the signal selecting circuit 30, the signal generation apparatus 50 are produced
Raw base band absolute code data B are converted into base band relocatable code data D, so as to finally produce 2DPSK signals.The change-over circuit
Input can connect the signal generation apparatus, and the outfan of the change-over circuit can connect the control of the signal selecting circuit
End.
In one embodiment, can be arranging one between the signal generation apparatus 50 and the clock generator 40
Individual synchronizer 80, aligns for base band relocatable code data D and the clock signal clk are carried out edge.
As shown in Fig. 2 the modulation circuit 20 may include：
First reverser 201, direct current negative-feedback circuit 202, transmission gate circuit 203, the first delay cell 204, second prolong
The cascade string 206 that unit 205 and even number cascade reverser are constituted late；
The input of the cascade string 206 is connected to the outfan of first reverser 201, the cascade string 206
Outfan is connected to the input of transmission gate circuit 203；It is reverse that the outfan of the transmission gate circuit 203 is connected to described first
The input of device 201；The direct current negative-feedback circuit 202 is connected across the two ends of first reverser 201；Described first is reverse
The outfan of the outfan of device 201 and the transmission gate circuit 203 is all connected to the signal input part of the signal selecting circuit；
The control end of the transmission gate circuit 203 is connected to the outfan of the pulse-generating circuit 10.
In one embodiment, the transmission gate circuit 203 may include the first MOS transistor 203a, the second MOS transistor
203b and the second reverser 203c；The drain electrode of the first MOS transistor 203a and the source electrode of the second MOS transistor 203b connect
The drain electrode of the outfan and first delay cell 204 of the cascade string 206, the source electrode of the first MOS transistor 203a
Drain electrode with the second MOS transistor 203b connects the input of first reverser 201, and connects the signal selecting circuit
The grid of 30 signal input part, the grid of the first MOS transistor 203a and the second MOS transistor 203b connects respectively
Connect the outfan and input of the second reverser 203c.
In one embodiment, first delay unit 204 may include the 3rd MOS transistor 204a and the first electric capacity
204b；The drain electrode connection outfan for cascading string 206 of the 3rd MOS transistor 204a, the 3rd MOS transistor
The grid connection external power source V of 204ab2, the one of source electrode connection the first electric capacity 204b of the 3rd MOS transistor 204a
End, the other end ground connection of the first electric capacity 204b.
Second delay unit 205 may include the 4th MOS transistor 205a and the second electric capacity 205b；4th MOS
The drain electrode of transistor 205a connects the input of first reverser 201, the grid connection of the 4th MOS transistor 205a
External power source Vb3, one end of source electrode connection the second electric capacity 205b of the 4th MOS transistor 205a, second electric capacity
The other end ground connection of 205b.
In one embodiment, can be using MOS transistor as the D.C. feedback circuit, the grid of the MOS transistor
Pole connects the outfan of the first reverser, the input of drain electrode the first reverser of connection, source electrode connection external power source Vb1。
First reverser 201, transmission gate circuit 203 and cascade string 206 may make up complete controlled oscillation loop, institute
State the first delay cell 204 and the second delay cell 205 according to actual delay need can access appointing in controlled oscillation loop
Meaning node.First delay cell 204 and the second delay cell 205 can adjust the total transmission of the controlled oscillation loop
Postpone, so as to change the mid frequency of 20 output signal of the modulation circuit.Described in making as the narrow pulse clock signal GCLK
When transmission gate circuit 203 is turned on, the controlled oscillation loop conducting vibration occurs, and in the input of first reverser 201
And outfan produces the first modulated signal T0 and the second modulated signal T180 respectively；When the narrow pulse clock signal GCLK makes institute
When stating the cut-off of transmission gate circuit 203, the controlled oscillation loop disconnects vibration to be stopped.
When the transmission gate circuit 203 ends, can be by first modulated signal T0 and the second modulated signal T180
Level is set to the half of power supply double track level difference.By the setting, output signal average can be made to be zero, so as to filter output
Fundamental wave component and flip-flop in signal, only retain design signal frequency composition, prevent these extra frequencies into
Divide and take wired channel band width, destroy power spectrum signal, so as to improve the availability of frequency spectrum, while reducing subsequent conditioning circuit
Power consumption.
The total transmission that the modulation circuit 20 can be passed through to adjust postpones, so as to adjust in final output modulated signal
Heart angular frequency.
In one embodiment, the sender unit 100 may also include deferred mount 90, the deferred mount 90
Input is connected with the doubleway output end of the modulation circuit 20, the outfan of the deferred mount 90 and the signal behavior
The input of circuit 30 is connected；The deferred mount 90 is according to default time delay to first modulated signal T0 and
Two modulated signals T180 carry out delay operation, obtain postpone the first modulated signal T0 ' and delay the second modulated signal
T180 ', and export the signal selecting circuit 30.
The purpose of delay is, for the integrity for ensureing modulation output signal, can be set to the default time delay little
In the value of cycle and the difference of pulse width G of the narrow pulse clock signal GCLK of the clock signal clk.As shown in figure 3,
As T0 and T180 oscillating impulses width is G, and must fall in base band data corresponding 1 or 0 time width (cycle of CLK)
Within, if postponing to be more than the cycle of CLK and the difference of pulse width G, the situation being likely to occur shown in Fig. 4, when this
(TD is more than the cycle of the synchronised clock CLK and the difference of pulse width G), follow-up " two-way select unit " when situation occurs
Signal of the final output for entanglement.T0 and T180 is the two-way rp pulse modulated signal of above-mentioned controlled oscillation loop output, this
The mid frequency of two-way modulated signal can correspond to the inverse of controlled oscillation loop transfer time delay.By being embedded in delay cell,
The delay of controlled oscillation loop can be adjusted, so as to reach the effect for adjusting output signal T0 and T180 mid frequencyes.
Pulse-generating circuit 10 in above-mentioned sender unit 100 can produce the narrow pulse clock that pulse width is G to be believed
Number GCLK (inverse of pulse width G, the bandwidth of correspondence final system output signal), the vibration of above-mentioned controlled oscillation loop
The mid frequency of the frequency inverse of time delay (loop transfer) correspondence final system output signal.In this way, can be with
Base band data to being input into carries out a kind of band spectrum modulation, traditional narrow means of communication is spread to broadband connections means, so as to reach
To the purpose for reducing power spectrum signal, improve noise robustness, improve transfer rate.
Hypothesis channel width be 0.1M～150MHz, traditional narrow communication technology can only utilize a wherein band frequency, such as
10M～20M.Bandwidth and mid frequency of the present invention by regulation output signal, it is possible to achieve flexibly covering to channel
Lid, such as realizes 25.5MHz～125.5MHz (mid frequency is 75.5MHz, and bandwidth is 100MHz).
The pulse-generating circuit 10, modulation circuit 20 and signal selecting circuit 30 can be integrated in SOC.
Assume that the narrow pulse clock signal GCLK of the output of the pulse-generating circuit 10 is expressed as GCLK (t), base band is relative
Code data D are expressed as D (t), then the first modulated signal T0 and the second modulated signal T180 that modulation circuit 20 is obtained can be respectively
It is expressed as：
T0=GCLK (t) COS (ω t) and T180=GCLK (t) COS (ω t+ π),
Wherein, ω is the angular frequency of first modulated signal T0 and the second modulated signal T180.
The two-way of the signal selecting circuit 30 can will be respectively fed to after signal T0 and T180 time delay with base band data D (t)
Signal input part, gating control signal, when base band relocatable code data D (t) for " logical zero " when, signal selecting circuit 30 is optional
Logical output T0, when D (t) for " logic 1 " when, signal selecting circuit 30 can gate output T180；The then signal selecting circuit 30
The transmission signal of output can be merged into：
M (t)=GCLK (t) COS [ω t+D (t) π],
Wherein, the center angular frequency of transmission signal m (t) can be expressed as：
Wherein τtotal=τTD1+τTD2+τINO+τTG+τ1, τtotalTotal transmission time delay of controlled oscillation loop is represented,
τTD1Represent the propagation delay time of the first delay cell 204, τTD2Represent the propagation delay time of the second delay cell 205, τINO
Represent the propagation delay time of the first reverser 201, τTGRepresent the propagation delay time of transmission gate circuit 203, τ1Represent cascade
The propagation delay time of string 206, by the propagation delay time for adjusting first delay cell 204 and the second delay cell 205
Between τTD1And τTD2, and then the total transmission delay τ of the controlled oscillation loop can be adjustedtotal, so as to change modulation circuit 20
The mid frequency ω of output modulated signal, the mid frequency of the final modulated signal for changing emission system output.
Flow charts of the Fig. 5 for the signal transmitting method of one embodiment.As shown in figure 5, the signal transmitting method can be wrapped
Include following steps：
S1, receives clock signal, and generates narrow pulse clock signal according to the clock signal；
S2, carries out bi-phase modulated to the narrow pulse clock signal, obtain the first contrary each other modulated signal of phase place and
Second modulated signal；
S3, receives base band relocatable code data, and when the base band relocatable code data are high level, selects output described the
One modulated signal is launched, and when the base band relocatable code data are low level, selects output second modulated signal to enter
Row transmitting.
Each step of above-mentioned signal transmitting method can adopt the modules of the sender unit realizing,
Can be realized using software approach, here is omitted.
Structural representations of the Fig. 6 for the communicator 400 of one embodiment.The communicator 400 may include：
Sender unit 100, first sensor 200, second sensor 300, and signal receiving device 60；
Signal selecting circuit 30 in the sender unit 100 is connected with the input of the first sensor 200
Connect, the outfan of the first sensor 200 is connected with the input of the second sensor 300, the second sensor
300 outfan is connected with the input of the signal receiving device 60；
The signal selecting circuit 30 launches first modulated signal T0 and the second modulated signal T180 to described
First modulated signal T0 and the second modulated signal T180 are loaded into signal by one sensor 200, the first sensor 200
Transmission medium, the second sensor 300 extract first modulated signal T0 and the second modulation from the signal transmission medium
Signal T180, and it is transferred to the signal receiving device 60.
With reference to Fig. 6, the signal u that signal generation apparatus 50 can be producediSend into the input of the sender unit 100
End, the sender unit 100 can be to uiWideband pulse trigger-type 2DPSK modulation is carried out, and is launched to first sensor 200
Wideband pulse formula 2DPSK signal un, signal unCan be by communication medium to second sensor 300, by second sensor 300
Output wideband pulse formula 2DPSK signal u'n, then by signal receiving device 60 to signal u'nReceived and demodulated, exported base
Band data.
Wherein, the first sensor 200 and second sensor 300 can be separately mounted to entrained by different user can
In wearable device, be for example worn on the blood oxygen transducer of finger tip, Wrist watch type blood glucose sensor, Implantable ECG monitoring sensor,
Implanted eeg signal acquisition sensor etc..In this case, the communication media can be human body medium.By broadband arteries and veins
Rush trigger-type 2DPSK modulation with lift-off technology be used for the human body medium communications field when, it is not necessary to base band data NRZ produce, it is double
Operation and the related circuits such as the reverse base band data burst pulse modulation in road is produced, fundamental wave elimination, and it is intermittent with burst pulse trigger-type
Radiation pattern reduce power consumption, to greatest extent using limited human body medium's channel width, improve transfer rate, and launched
The bandwidth and center angular frequency of modulated signal is flexibly adjustable with good using value.
The embodiment of the sender unit 100 in above-mentioned communicator 400 is identical with above-mentioned sender unit 100,
Here is omitted.
As shown in fig. 7, the present invention also provides a kind of signal processing apparatus, it may include signal generation apparatus 50, communicator
400, and computer 500；Sender unit in the outfan of the signal generation apparatus 50 and the communicator 400
100 input is connected, outfan and the computer 500 of the signal receiving device 60 in the communicator 400
Input is connected.
In said signal processing device, the embodiment of communicator 400 is identical with above-mentioned communicator 400, no longer goes to live in the household of one's in-laws on getting married herein
State.
The sender unit of the present invention, communicator and signal processing apparatus have low complex degree, low-power consumption and are easy to
Integrated feature, it is adaptable to the field such as broadband connections, communication integrated circuit, radio frequency electronic circuits, bio-medical microelectronics.
Compared with prior art, the invention has the advantages that and effect：The present invention improves the band efficiency of channel,
Signaling rate is improve, system is operated in digital trigger-type state, in realization can be with low-power consumption, low complex degree, height
The advantage of speed brings the per bit energy consumption of system and significantly reduces, and can be realized using CMOS integrated circuit technologies completely, and not
There is large-area integrated resistor and electric capacity shaping circuit, be adapted to be integrated in SOC, it is easy to promote.
Each technical characteristic of embodiment described above arbitrarily can be combined, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but and
Therefore can not be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art comes
Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (10)
1. a kind of sender unit, it is characterised in that include：
Pulse-generating circuit, modulation circuit and signal selecting circuit；
The input of the pulse-generating circuit is connected to clock generator, and the outfan of the pulse-generating circuit is connected to institute
The input of modulation circuit is stated, the doubleway output end of the modulation circuit is connected to the signal input of the signal selecting circuit
End, the control end of the signal selecting circuit are connected to signal generation apparatus, and the outfan of the signal selecting circuit is connected to
Signal receiving device；
The pulse-generating circuit receives the clock signal that clock generator is produced, and generates burst pulse according to the clock signal
Clock signal, and by the narrow pulse clock signal output to the modulation circuit；
The modulation circuit carries out bi-phase modulated to the narrow pulse clock signal, obtains the first contrary each other modulation letter of phase place
Number and the second modulated signal, and by first modulated signal and the output of the second modulated signal to the signal selecting circuit；
The signal selecting circuit receives the base band relocatable code data that signal generation apparatus are produced, and in the relative yardage of the base band
According to for high level when, select output first modulated signal to be launched, when the base band relocatable code data are low level,
Output second modulated signal is selected to be launched.
2. sender unit according to claim 1, it is characterised in that also include：It is connected to the signal and dress occurs
Put and the change-over circuit between the signal selecting circuit；For the base band absolute code data for producing the signal generation apparatus
It is converted into base band relocatable code data.
3. sender unit according to claim 1, it is characterised in that also include：
The synchronizer being connected between the signal generation apparatus and the clock generator, for by the base band relocatable code
Data carry out edge with the clock signal and align.
4. sender unit according to claim 1, it is characterised in that also include：
Deferred mount；
The input of the deferred mount is connected with the doubleway output end of the modulation circuit, the outfan of the deferred mount
It is connected with the signal input part of the signal selecting circuit；
The deferred mount carries out delay behaviour to first modulated signal and the second modulated signal according to default time delay
Make, obtain the second modulated signal of the first modulated signal and delay for postponing, and export the signal selecting circuit.
5. sender unit according to claim 4, it is characterised in that the default time delay less than it is described when
The difference of the cycle of clock signal and the pulse width of the narrow pulse clock signal.
6. sender unit according to claim 1, it is characterised in that the modulation circuit includes：
First reverser, direct current negative-feedback circuit, transmission gate circuit, the first delay cell, the second delay cell and even number
The cascade string of cascade reverser composition；
The input of the cascade string is connected to the outfan of first reverser, and the outfan of the cascade string is connected to biography
The input of defeated gate circuit；The outfan of the transmission gate circuit is connected to the input of first reverser；The direct current
Negative-feedback circuit is connected across the two ends of first reverser；The outfan and the transmission gate circuit of first reverser
Outfan is all connected to the signal input part of the signal selecting circuit；The control end of the transmission gate circuit is connected to the arteries and veins
Punching produces the outfan of circuit；
When the transmission gate circuit ends, the level of first modulated signal and the second modulated signal is power supply double track electricity
The half of adjustment.
7. sender unit according to claim 1, it is characterised in that the pulse-generating circuit is additionally operable to：
The pulse of the narrow pulse clock signal is adjusted according to the bandwidth of first modulated signal and the second modulated signal
Width.
8. a kind of signal transmitting method, it is characterised in that comprise the following steps：
Clock signal is received, and narrow pulse clock signal is generated according to the clock signal；
Bi-phase modulated is carried out to the narrow pulse clock signal, the first contrary each other modulated signal of phase place and the second modulation is obtained
Signal；
Base band relocatable code data are received, and when the base band relocatable code data are high level, selects output first modulation
Signal is launched, and when the base band relocatable code data are low level, selects output second modulated signal to be launched.
9. a kind of communicator, it is characterised in that include：
Sender unit as described in claim 1 to 7 any one, first sensor, second sensor, and signal connect
Receiving apparatus；
Signal selecting circuit in the sender unit is connected with the input of the first sensor, and described first passes
The outfan of sensor is connected by transmission medium with the input of the second sensor, the outfan of the second sensor
It is connected with the input of the signal receiving device；
The signal selecting circuit launches first modulated signal and the second modulated signal to the first sensor, described
First modulated signal and the second modulated signal are loaded into signal transmission medium by first sensor, the second sensor from
The signal transmission medium extracts first modulated signal and the second modulated signal, and is transferred to the signal receiving device.
10. a kind of signal processing apparatus, it is characterised in that include：
Signal generation apparatus；
Communicator as claimed in claim 9；And
Computer；
The outfan of the signal generation apparatus is connected with the input of the sender unit in the communicator, described
The outfan of the signal receiving device in communicator is connected with the input of the computer.
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| CN109639259B (en) | 2018-12-05 | 2022-07-22 | 惠科股份有限公司 | Method for spreading spectrum, chip, display panel and readable storage medium |
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| CN102223334A (en) * | 2011-06-20 | 2011-10-19 | 华南理工大学 | 2DPSK (Differential Phase Shift Keying) demodulation circuit, demodulation method and wireless signal receiver system |
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| CN102223334A (en) * | 2011-06-20 | 2011-10-19 | 华南理工大学 | 2DPSK (Differential Phase Shift Keying) demodulation circuit, demodulation method and wireless signal receiver system |
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