CN110266326A - A kind of Integrated Service Digital Network radio-frequency front-end control method and its system based on OOK - Google Patents
A kind of Integrated Service Digital Network radio-frequency front-end control method and its system based on OOK Download PDFInfo
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- CN110266326A CN110266326A CN201910530966.9A CN201910530966A CN110266326A CN 110266326 A CN110266326 A CN 110266326A CN 201910530966 A CN201910530966 A CN 201910530966A CN 110266326 A CN110266326 A CN 110266326A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0028—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at baseband stage
- H04B1/0042—Digital filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
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Abstract
It is modulated on different carrier frequencies by the Integrated Service Digital Network radio-frequency front-end control method based on OOK that the present invention relates to a kind of by the radio-frequency front-end TTL control signal that base band scheduling unit exports respectively by OOK mode；Radio-frequency front-end separates modulated signal by filter group, then hands over OOK demodulator to carry out demodulation acquisition corresponding control signal to signal respectively and controls radio-frequency front-end corresponding unit circuit.This programme can realize the control of multiple fast-response control signals, mutually indepedent between each control signal, such as transmission duplex (T/R) control, receiving channel control (LNA_EN) and transmission channel control (PA_EN)；It controls signal and is based on base band scheduling unit, it is unrelated with transceiving radio frequency signal, it is not influenced by signal bandwidth, power etc., versatility is good, is suitable for different communication system；Control signal has the characteristics that time delay and delay variation are small, while supporting to carry out delay compensation using base band scheduling unit；Binary system on off keying control circuit is realized simple, at low cost and low in energy consumption.
Description
Technical field
The present invention relates to the communications fields, and in particular to a kind of Integrated Service Digital Network radio-frequency front-end control method and system based on OOK.
Background technique
It is increasingly stringent to the horsepower requirements of terminal for response energy conservation and environmental protection strategy in Modern Mobile Communications Systems terminal,
Especially in battery power supply and the limited mobile terminal device of battery size capacity, energy consumption determines the length in complete machine cruise duration
It is short, while also directly affecting the ease for use and availability of terminal.To realize energy-efficient requirement, terminal is usually according to business demand
Situation carries out adjustment determination in real time and opens or closes radio-frequency front-end, radio-frequency channel and base-band hardware accelerator, base band supple-settlement list
The functional units such as member, to realize the low-power consumption energy conservation of modules at different levels, scheduling unit is obtained according to baseband processing unit according to agreement
Scheduling control parameter, completes the low-power consumption scheduling to each functional module, and functional block diagram is as shown in Figure 1.
The characteristic received and dispatched in view of time division multiple acess (TDMA) system according to time slot compared with the understanding for being conducive to control scheduling, below
It is illustrated by taking TDMA system as an example.TDMA system terminal determines terminal when corresponding according to system resource Time slot allocation situation
(transmitting-receiving time slot can be overlapped or have interval, this depends on the transmitting-receiving of system and terminal for the reception and transmitting that gap completes signal
Multiplex mode is frequency division multiplexing or time division multiplexing), transmitting-receiving is relatively independent, i.e., when receiving free timeslot, respective radio-frequency front end
Low power consumpting state should all be handled by receiving low noise (LNA), radio frequency reception channel and Baseband Receiver processing unit；Similarly, emitting
When free timeslot, respective radio-frequency front-end power amplifier (PA), radio frequency sendaisle and base band send processing unit and should be at
Low power consumpting state.
In current Conventional communications terminals, due to baseband processing unit, radio-frequency channel unit and radio frequency front-end unit multi-pass
It crosses the modes such as printed board (PCB) grade, chip-scale and software logic control to be integrated, is easier to realize scheduler module pair
The control of each unit.However in the terminal that part needs to adapt to zoom out application scenarios, radio-frequency front-end need to be separated by with end host
Carry out more at a distance using.For user convenience, the connection for reducing equipment room when using, frequently with a radio frequency coaxial cables
It is attached, i.e. " Integrated Service Digital Network ".
As the Chinese patent of Publication No. CN109217830A, a kind of radio-frequency power amplifier ON-OFF control circuit is penetrated
It is mentioned in frequency front end emission link and receives link, a radio frequency coaxial cables need while transmitting radio-frequency receiving-transmitting signal, direct current
Power supply, multicarrier communication signal etc..Multicarrier communication signal is by carrier modulation technique transmitting serial port command parameter, to realize radio frequency
The Configuration Online of front end parameter.DC power supply is transmitted by way of power feed by RF cable, for before radio frequency
End equipment power supply, thus cannot again simultaneous transmission transmitting-receiving control (T/R), low noise when can (LNA_EN) and power amplifier it is enabled (PA_EN)
Equal low frequencies (nearly direct current) TTL logic control signal.Although can by carrier communication control instruction, close power supply and
What is used in CN109217830A realizes the control of radio-frequency front-end low-power consumption based on signal detection scheme, so exists to a certain degree
On defect or non-optimal scheme.
Communication instruction control program, when realizing radio-frequency front-end low power consumption control by carrier communication control instruction, due to adopting
Serial ports instruction is transmitted with the mode of carrier modulation, there are biggish delays, it is impossible to be used in 10us grade and faster the time is loud
In the terminal that should be required.For simplifying quick 1 byte serial ports control, serial port baud rate is set as 115200, when transmitting
It is long are as follows:
The above-mentioned time is only to transmit the time required for the byte data, does not still include processor dissection process data
Processing delay, and in actual use, it is numerous that communication instruction need to complete function, such as radio-frequency front-end reception gain is arranged and inquires, hair
Send gain be arranged and inquiry, the inquiry of radio-frequency front-end temperature, the inquiry of radio-frequency front-end power amplifier output power, radio-frequency front-end power amplifier state,
Radio-frequency front-end antenna attitude (orientation, pitching) etc., therefore the communication protocol for generalling use formatting in actual implementation is controlled
System, for protocol data length up to 16 bytes even bytes up to a hundred, delay of control will be longer, and when processor analyzes the instruction at
Manage device other software function effect, it is possible to create larger delay variation is mended to be unfavorable for base band scheduling unit using the time
The mode repaid is sent control letter in advance, and simultaneous processor needs real time parsing to instruct, can equally generate larger power consumption, therefore
The low-power consumption real-time control of radio-frequency front-end is not suitable for；
Close power source design；Extremely low power consumption can be obtained by closing power source design, however also bring along very serious ask
Topic --- signal can not be received.Due to being powered using single radio-frequency coaxial cable feed, transmitting-receiving can not individually be controlled
System causes receiving channel after closing power supply also to can not work normally, and terminal actively can only initiate business and cannot passively receive industry
Business, or even need to receive in synchronous and broadcast message system most of, terminal will move out network, seriously affect the function of terminal
Energy business, therefore this scheme is applied and its is limited；
Based on the scheme of signal detection in CN109217830A.The program is mainly used for detecting to control transmission signal
The low-power consumption of power amplifier processed, is typically due to the main energy-consuming parts that power amplifier is radio-frequency front-end, this function can largely improve
The power consumption of entire radio-frequency front-end.However there are still more shortcomings for this scheme:
(1) it only can control sendaisle, can not achieve other controls, such as receiving channel and T/R control.Usually receive letter
Number carrier-to-noise ratio is lower, and receiving signal bandwidth in addition is whole system frequency band, is much larger than actual signal bandwidth, therefore it is logical to receive signal
It is often submerged in broadband noise, can not detect to receive signal by simple signal detecting mode, it is mobile logical to lead to satellite with day
For letter system, radio-frequency front-end receiving channel bandwidth is 30MHz, and actual voice channel width is 20KHz or so, and carrier-to-noise ratio is disliked
Change about 32dB.Further, since radio-frequency front-end receiving channel can receive all channel signals in whole system bandwidth, can not identify
The signal detected is really needed out, therefore can not achieve the low power consumption control of receiving channel.
(2) there are time delays for inspection wave control signal, and cannot be compensated by base band dispatch control unit.Detection control electricity
Road is by checking that true transmission signal opens and closes control signal to generate.By wave detector, comparator, analog switch etc.
The delay character of circuit influences, and opening control signal is later than transmission signal always, to influence to send signal quality, when serious
Can transmission signal be will affect meet the requirement of switch time template.It sends signal strictly to be controlled by base band scheduling unit, and must
It must be aligned with system regulation time slot, thus cannot achieve the purpose that compensate associated time delays by simply sending signal in advance.
By taking day leads to satellite mobile communication system as an example, when carrying out peak data rate transmission, its character rate is about
250k/s requires (see Fig. 2) according to switch time template, and the burst power rise time is 2 symbol time, that is, 8us, at it
It needs to reach later and meets power rating, therefore the power amplifier switch response time is necessarily less than 8us (time delay containing detecting circuit).And it is practical
It is also contemplated that whether it meets the requirement of burst power ascending formwork when realization, therefore the power amplifier switch response time should be minimized
Influence to burst signal should control the i.e. 2us within 0.5 symbol.
The above citing is only to ring in the case that day leads to satellite mobile communication system character rate for 250k/s to control signal
The requirement for answering time delay, million is per second on character rate in addition tens communication systems per second in, requiring delay of control will
The harsher or even program will be no longer applicable in.
(3) detection control signal time delay size is influenced by signal power, and is had to input signal power (carrier-to-noise ratio) minimum
It is required that.
Due to the detection characteristic of wave detector and rear class comparator fixed reference threshold voltage, when signal power is larger
When, it is more than with reference to threshold voltage, to control if initial stage (such as 0.3 symbol) its detection output voltage that burst power rises
Rear class power amplifier is opened；However when signal power is smaller, it may be necessary in middle and later periods (such as 1 symbol) side that burst power rises
Rear class power amplifier can be opened, to form different time delay sizes.
When input signal power (or carrier-to-noise ratio) is smaller, when having signal and no signal, wave detector exports detecting circuit wave
It is dynamic smaller, while more sensitive to comparison threshold setting, it is be easy to cause control logic mistake, therefore carry in transmitting input signal
Make an uproar it is relatively low in the case where the program will not be applicable in.
(4) introducing of detection control circuit still will increase radio-frequency front-end power consumption.For guarantee the normal detection of smaller signal with
Lesser detection delay of control, the road of detection usually require that signal is amplified to suitable function according to the power detection range of wave detector
Rate level, if the linear detection range of wave detector LT5534 in 109217830 A of CN is about -50dBm to -8dBm (see Fig. 3),
The amplifier N1 used in the road of detection, these devices needs are always maintained at the state of working on power, thus can also generate not low
Power consumption, especially amplifier.
Summary of the invention
The Integrated Service Digital Network radio-frequency front-end control based on OOK that it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of
Method processed, the existing relevant issues of very good solution and meets requirement.
The purpose of the present invention is achieved through the following technical solutions:
A kind of Integrated Service Digital Network radio-frequency front-end control method based on OOK, comprising:
S100: it is modulated at by the radio-frequency front-end TTL control signal that base band scheduling unit exports respectively by OOK mode
On different carrier frequencies；
S200: radio-frequency front-end separates modulated signal by filter group, then hands over OOK demodulator respectively to signal
It carries out demodulation and obtains corresponding control signal；
S300: radio-frequency front-end corresponding unit circuit is controlled with the corresponding control signal of acquisition.
Further, the carrier frequency modulation step of the OOK includes:
S101: selecting frequency is the carrier frequency of 10MHz-100MHz as OOK carrier frequency；
S102: to the OOK carrier frequency of 10MHz or more, it is inhibited using 4.7uH inductance；
S103: in the case where identical transmission signal level and reception range of signal, lower frequency should be selected as far as possible.
Further, power feed is realized using the feed circuit that classification inhibits in the step S102, i.e., in magnetic core
According to each radio frequency signal frequency before power inductance (high frequency Q value is about 10, and usually there are 0.5pF or so parasitic capacitances for encapsulation)
The LC suppression circuit of one or more levels air core inductor (high frequency Q value is higher up to 40) and capacitor composition is added in relationship,.
Further, the OOK carrier frequency can be used low-power consumption crystal oscillator and directly generate.
Further, the corresponding control signal includes but is not limited to duplexer control letter T/R ', low-noise amplifier control
Signal LNA_EN ' processed, amplifirer control signal PA_EN ', except the above signal is with to further include remaining front-end control signal.
A kind of Integrated Service Digital Network radio-frequency front-end control system based on OOK, the system is by radio frequency front-end unit, radio frequency Integrated Service Digital Network list
Member and baseband processing unit composition；
The radio frequency front-end unit includes antenna, duplexer, amplifirer, low-noise amplifier, multichannel OOK demodulator, preceding
End filter group；
The radio frequency Integrated Service Digital Network unit includes rear end filter group, multichannel OOK demodulator；
The baseband processing unit includes radio-frequency receiving-transmitting channel, scheduler module, base-band digital processing module；
The radio-frequency front-end TTL control signal of output is modulated in the radio frequency Integrated Service Digital Network unit by the scheduler module respectively
Different multichannel OOK demodulators on, obtain modulated signal；
The modulated signal is transmitted to front end filter group via rear end filter group；
The front end filter group modulated signal is subjected to separation to obtain corresponding control signal be used to control it is described
Duplexer, amplifirer, low-noise amplifier.
Further, the multichannel OOK demodulator carrier frequency is different.
Further, the base-band digital processing module is used to carry out information exchange with upper layer application.
Further, the scheduler module is also used to control radio-frequency receiving-transmitting channel and completes to put with the amplifirer, low noise
Information exchange between big device.
The beneficial effects of the present invention are:
(1) control of multiple fast-response control signals can be achieved, it is mutually indepedent between each control signal, such as transmission duplex
(T/R) control, receiving channel control (LNA_EN) and transmission channel control (PA_EN) etc.；
(2) control signal is based on base band scheduling unit, unrelated with transceiving radio frequency signal, not by shadows such as signal bandwidth, power
It rings, versatility is good, is suitable for different communication system；
(3) control signal have the characteristics that time delay and delay variation are small, while support using base band scheduling unit progress when
Prolong compensation；
(4) binary system on off keying control circuit is realized simple, at low cost and low in energy consumption.
Detailed description of the invention
Fig. 1 is scheduling controlling schematic diagram in prior art communication terminal；
Fig. 2 is prior art burst switch power time template；
Fig. 3 is LT5534 output voltage in the prior art and RF input power relation curve；
Fig. 4 is the radio-frequency front-end control principle block diagram based on OOK；
Fig. 5 is OOK modulation principle block diagram；
Fig. 6 is OOK modulated signal waveform schematic diagram；
Fig. 7 is DC feedback to input port reflective index impacts simulating schematic diagram；
Fig. 8 is DC feedback to input port reflective index impacts simulation result；
Fig. 9 is classification feed to input port reflective index impacts simulating schematic diagram；
Figure 10 is classification feed to input port reflective index impacts simulation result；
Figure 11 is that the logical portable terminal in day uses schematic diagram；
Figure 12 is OOK portion radio frequency filter circuit analogous diagram；
Figure 13 is OOK portion radio frequency filter circuit simulation result；
Figure 14 is end host " Integrated Service Digital Network " radio frequency part circuit diagram；
Figure 15 is terminal antenna radio-frequency front-end " Integrated Service Digital Network " partial circuit diagram；
Figure 16 is " Integrated Service Digital Network " OOK modulation /demodulation test waveform.
Specific embodiment
Technical solution of the present invention is described in further detail combined with specific embodiments below, but protection scope of the present invention is not
It is confined to as described below.
OOK (On-Off Keying, binary system on off keying) also known as binary system amplitude-shift keying (2ASK), it is with monopole
Property non-return to zero code sequence controls the open and close of sinusoidal carrier.Signal waveform is shown in its modulation principle block diagram and modulated process
It is intended to as shown in Figure 5.
A kind of Integrated Service Digital Network radio-frequency front-end control method based on OOK, comprising:
S100: it is modulated at by the radio-frequency front-end TTL control signal that base band scheduling unit exports respectively by OOK mode
On different carrier frequencies；
S200: radio-frequency front-end separates modulated signal by filter group, then hands over OOK demodulator respectively to signal
It carries out demodulation and obtains corresponding control signal；
S300: radio-frequency front-end corresponding unit circuit is controlled with the corresponding control signal of acquisition.
As a kind of preferred embodiment, the carrier frequency modulation step of above-mentioned OOK includes:
S101: selecting frequency is the carrier frequency of 10MHz-100MHz as OOK carrier frequency；
S102: to the OOK carrier frequency of 10MHz or more, it is inhibited using 4.7uH inductance；
S103: in the case where identical transmission signal level and reception range of signal, lower frequency should be selected as far as possible.
Since each modulated control signal needs system operating RF signal and power supply etc. to carry out by a RF cable
Transmission, therefore the carrier frequency of each modulated signal should fully consider following factor when determining.
(1) modulation /demodulation time delay and delay variation
OOK modulation /demodulation time delay and delay variation characteristic, except the switching time delay characteristic of modulator, envelope detector time delay are special
Property and sampling decision device delay character influence outer, also influenced by carrier frequency itself.As shown in fig. 6, modulation carrier wave be single-tone just
String wave, signal amplitude are in cyclophysis, and switch turn on moment is random times, and corresponding to carrier signal amplitude can be amplitude
Arbitrary value in range, it is assumed that demodulation decision threshold is 1/2 full width, then when reaching the maximum of 1/2 full width from switch conduction to carrier wave
Prolong as 1/4 period, i.e.,
T=T/4=1/4f
The value is equally also delay variation maximum value.By taking the permission maximum delay 2us to illustrate above as an example, then minimum carrier wave
Frequency 125KHz.In view of the time delay that the needs of practical envelope detector response and other circuits introduce, this carrier frequency is answered
Select as far as possible higher, higher carrier frequency can get more preferably delay variation characteristic (when delay variation requires desirable maximum
1/10 prolonged is even lower), it is therefore proposed that carrier frequency should be not less than 1.25MHz.
(2) interference system operating RF signal and power supply are avoided
In wireless communication system, the radiofrequency signal received from antenna is usually all very faint, can be low by taking it is logical as an example
To -120dBm hereinafter, easily by other signal interferences, although it is anti-by after rear class low-noise amplifier (LNA) enhanced processing
Interference performance increases, but there is still a need for the suitable OOK modulated carrier frequencies of selection to ensure that modulated signal is penetrated by a line
Radiofrequency signal will not be received to communication system when frequency cable to interfere.For launch channel, though transmission power is relatively
Greatly, but usually 60dB~80dB is required to transmitting signal spurious reduction, therefore improperly OOK carrier frequency equally will become transmitting
When spurious signal so that transmitting signal be unsatisfactory for RF index requirement.Considering interference of the OOK carrier wave to operating RF signal
When, except needing that carrier wave itself is avoided to fall into inside and outside radiofrequency signal frequency band, it is also necessary to which filter joint characteristic considers its each harmonic
Component should not equally be fallen into radiofrequency signal frequency band, be typically considered as the influence not less than 10 order harmonics according to engineering experience.One
By power supply feed-in RF cable usually in such a way that inductance capacitance (LC) is fed, LC feed circuit can be realized pair power supply during line is logical
The inhibition of high-frequency signal, inductance need to meet the requirement of direct current current-carrying capability.However high-frequency signal frequency is lower, identical inhibition energy
The inductance of the LC of power is bigger, and size also can be bigger, and high frequency characteristics is deteriorated, and the inductor of identical size is because under inductance
Drop declines high-frequency suppressing ability, and the high-frequency signal after leakage can enter DCDC circuit, may cause DCDC circuit when serious
Job insecurity, it is therefore proposed that the OOK carrier frequency that selection is higher, carries out it as 4.7uH inductance can be used in 10MHz or more
Inhibit.
(3) it is easy to carrier signal generation
The generation of carrier signal can directly be generated according to frequency difference by oscillator, can also pass through phaselocked loop
(PLL), frequency multiplier and direct digital synthesis technique (DDS) etc. are synthesized.Frequency can be shaken by crystal within usual 100MHz
It swings device and silicon oscillator etc. directly to generate, circuit is simple, power consumption requirements are low, at low cost；Carrier frequency higher than 100MHz is then led to
It is often synthetically produced, circuit is complicated, power consumption is high, at high cost, it is therefore proposed that 100MHz following frequencies is selected to carry as OOK
Wave frequency rate.
(4) it is easy to Signal separator extraction
Integrated Service Digital Network is that various signals are carried out simultaneous transmission by the way of frequency division multiplexing, using the low of different cutoff frequencies
The separation of each signal is realized in the combinations such as bandpass filter, high-pass filter and bandpass filter, power divider and circulator
It extracts.Therefore it when carrying out the selection of OOK modulating frequency, should fully consider to the Out-of-band rejection requirement of each filter, realizability
And way of realization (LC filter, dielectric filter, SAW filter SAW and LTCC filter etc.).
(5) cable waste
According to the frequency characteristic of RF cable, the more highly attenuating usual frequency the bigger, and different application pair is coped with when design
Differential loss caused by the difference of length of cable demand carries out sufficiently estimated assessment, ensures that each signal is in suitable and transmits and receives
Level range.Therefore when carrying out the selection of OOK modulating frequency, the case where identical transmission signal level is with range of signal is received
Under, because selecting lower frequency as far as possible, influenced caused by cable waste is on the demodulation of OOK signal when reducing because of the application of long line.
In summary OOK modulating frequency chooses factor, it is proposed that selects combination of frequency in 10MHz~100MHz frequency range
For controlling the OOK modulating frequency of signal.It can choose low-power consumption crystal oscillator and directly generate carrier wave, realize simple.Such as
When only realizing reception and transmission channel control, carrier frequency of the 20MHz and 40MHz as two modulated signals, local oscillator may be selected
The crystal oscillator that 3.2x2.5mm size can be used in signal generates, and power consumption is about 5mW.
As a kind of preferred embodiment, power feed is realized using the feed circuit that classification inhibits in step S102, i.e.,
It is added according to radiofrequency signal that one or more levels high frequency Q value is higher, the more preferably hollow electricity of high frequency characteristics before magnetic core power inductance
The LC suppression circuit of sense and capacitor composition realizes that the segmentation to high-frequency signal inhibits.
To realize inhibition of the road of feed to high-frequency signal (such as 2MHz multicarrier communication signal), while providing enough current-carrying
Ability needs to inhibit high-frequency signal using the power inductance and capacitor of uH rank inductance.To reduce inductor size, lead to
Often inductor of the selection with magnetic core, however influenced by core inductor own material and parasitic parameter etc., high frequency performance is poor, Q
It is worth low and there is frequency selective characteristic, if directly may cause in high frequency signal band in this, as feed inductance in actual use
Standing wave is deteriorated, and consistency is poor between individual.It is as shown in Figure 7, Figure 8 that simple simulation is carried out using ADS.In terms of the simulation result of Fig. 8
Out, DC feedback is larger to the above input port reflective index impacts of high band 1GHz so that port reflection coefficient be greater than-
10dB influences overall performance index.To solve the above problems, realizing power supply using the feed circuit that classification inhibits in this programme
Feed, i.e., before magnetic core power inductance according to radiofrequency signal be added one or more levels high frequency Q value is higher, high frequency characteristics more preferably
The LC suppression circuit of air core inductor and capacitor composition is realized that the segmentation to high-frequency signal inhibits, is guaranteed in entire high frequency signal band
The consistency of impedance, it is as shown in Figure 9 through simulation result.Seen according to the simulation result of Figure 10, DC feedback to high band 1GHz with
Upper input port reflective index impacts become smaller, so that port reflection coefficient is less than -20dB.However classification feed circuit can introduce one
A extreme point (Mark5), therefore specifically used frequencies at different levels is answered to adjust inductance capacitance parameter values at different levels in actual use, so that respectively
Working frequency port reflection coefficient is all satisfied requirement, can increase power supply series when necessary.
As a kind of preferred embodiment, corresponding control signal includes but is not limited to duplexer control signal T/R ', low noise
Amplifier control signal LNA_EN ', amplifirer control signal PA_EN ', except the above signal is with to further include remaining front-end control
Signal.
As shown in figure 4, a kind of Integrated Service Digital Network radio-frequency front-end control system based on OOK, the system by radio frequency front-end unit, penetrate
Frequency Integrated Service Digital Network unit and baseband processing unit composition；
Radio frequency front-end unit includes antenna, duplexer, amplifirer, low-noise amplifier, multichannel OOK demodulator, front end filter
Wave device group；
Radio frequency Integrated Service Digital Network unit includes rear end filter group, multichannel OOK demodulator；
Baseband processing unit includes radio-frequency receiving-transmitting channel, scheduler module, base-band digital processing module；
The radio-frequency front-end TTL control signal of output is modulated at different more in radio frequency Integrated Service Digital Network unit by scheduler module respectively
On the OOK demodulator of road, modulated signal is obtained；
Modulated signal is transmitted to front end filter group via rear end filter group；
Modulated signal is carried out separation to obtain corresponding control signal and be used to control duplexer, function by front end filter group
Put device, low-noise amplifier.
As a kind of preferred embodiment, multichannel OOK demodulator carrier frequency is different, and base-band digital processing module is used for
Information exchange is carried out with upper layer application, scheduler module is also used to control radio-frequency receiving-transmitting channel and completes and amplifirer, low noise amplification
Information exchange between device.
As shown in figure 11, by day lead to No.1 support zoom out the portable terminal of application for, illustrate " the Integrated Service Digital Network based on OOK
The use of radio-frequency front-end control method ".
Be attached between terminal radio frequency front end antenna and end host using a line RF cable, need to realize: it is logical
It collects mail number (2185MHz ± 15MHz), logical (1995MHz ± 15MHz), Beidou B1 (1561 ± 2.046MHz), Beidou of signaling in day
B3 (1268.52 ± 10.23MHz), day line traffic control (2MHz AISG:Antenna interface standards group) and
The transmission of DC power supply 30V, while demanding terminal has low-power consumption standby function, therefore this is used when design " based on OOK's
Integrated Service Digital Network radio-frequency front-end control method ".(power amplifier, driving amplifier, power are contained to the sendaisle of radio-frequency front-end respectively
Detecting circuit etc.) and receiving channel (containing front-end low noise amplifier and gain amplifier) progress power consumption control, it is optimal
Operating power consumption.
(1) OOK carrier frequency selects
According to each signal frequency combination OOK carrier frequency selection principle, in conjunction with ADS (Advanced Design System)
Software emulation chooses the carrier frequency that 20MHz and 40MHz is controlled as transceiver channel, low frequency part filter circuit and emulation
As a result as shown in Figure 12 and Figure 13.
(2) OOK modulating part design (end host end " Integrated Service Digital Network " radio frequency)
OOK channel part is designed according to said frequencies selection and Simulation results, and high frequency section is filtered using LTCC
The devices such as wave device, SAW filter (SAW), power splitter construct hf channel part, are not described specially herein.
OOK modulation local oscillator is respectively adopted 20MHz and 40MHz active crystal oscillator and generates carrier signal, and OOK modulation is then adopted
Carrier wave is opened and closed according to base belt controling signal with RF switch HMC849.
End host end " Integrated Service Digital Network " radio frequency part circuit is as shown in figure 14.
(3) demodulation part OOK design (terminal front end antenna " Integrated Service Digital Network " part)
OOK channel part is similar with modulation circuit, and high frequency section equally uses LTCC filter, SAW filter
(SAW), the devices such as power splitter construct hf channel part, and details are not described herein again.
OOK demodulation examines carrier signal using the power detector AD8361 of low-power consumption, high dynamic, quick response
Wave recovers low-frequency control signal then by differentiating that comparator TLV1702 carries out shaping output to detection output signal.
Terminal antenna radio-frequency front-end " Integrated Service Digital Network " partial circuit is as shown in figure 15.
(4) object test result
From " Integrated Service Digital Network " OOK modulation /demodulation test waveform curve (Figure 16) as can be seen that before the Integrated Service Digital Network radio frequency based on OOK
End control signal delay about 1.8us, coincident circuit expected design, the delay can handle part by base-band digital and be mended
It repays, meets overall design requirement.(such as: output power, closes on letter at Error Vector Magnitude (EVM) to every RF index of another complete machine
Road leakage inhibits than (ACLR), switch time template and stand-by power consumption etc.) it is all satisfied design requirement, therefore used by this programme
" the Integrated Service Digital Network radio-frequency front-end control method based on OOK " be it is practicable, being then equally applicable to other has similar want
In the communication system asked.
The above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to shape described herein
Formula should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and can be herein
In contemplated scope, modifications can be made through the above teachings or related fields of technology or knowledge.And what those skilled in the art were carried out changes
Dynamic and variation does not depart from the spirit and scope of the present invention, then all should be within the scope of protection of the appended claims of the present invention.
Claims (9)
1. a kind of Integrated Service Digital Network radio-frequency front-end control method based on OOK characterized by comprising
S100: it is modulated at difference by OOK mode by the radio-frequency front-end TTL control signal that base band scheduling unit exports respectively
In carrier frequency；
S200: radio-frequency front-end separates modulated signal by filter group, then OOK demodulator is handed over to carry out respectively to signal
Demodulation obtains corresponding control signal；
S300: radio-frequency front-end corresponding unit circuit is controlled with the corresponding control signal of acquisition.
2. a kind of Integrated Service Digital Network radio-frequency front-end control method based on OOK according to claim 1, which is characterized in that described
The carrier frequency modulation step of OOK includes:
S101: selecting frequency is the carrier frequency of 10MHz-100MHz as OOK carrier frequency；
S102: to the OOK carrier frequency of 10MHz or more, it is inhibited using 4.7uH inductance；
S103: in the case where identical transmission signal level and reception range of signal, lower frequency should be selected as far as possible.
3. a kind of Integrated Service Digital Network radio-frequency front-end control method based on OOK according to claim 2, which is characterized in that described
Power feed is realized using the feed circuit that classification inhibits in step S102, i.e., be added before magnetic core power inductance level-one or
The LC suppression circuit of multi-stage hollow inductance and capacitor composition realizes that the segmentation to high-frequency signal inhibits.
4. a kind of Integrated Service Digital Network radio-frequency front-end control method based on OOK according to claim 3, which is characterized in that described
OOK carrier frequency is directly generated using low-power consumption crystal oscillator.
5. a kind of Integrated Service Digital Network radio-frequency front-end control method based on OOK according to claim 4, which is characterized in that described
Corresponding control signal includes duplexer control signal T/R ', low-noise amplifier control signal LNA_EN ', amplifirer control signal
PA_EN’。
6. a kind of realize the Integrated Service Digital Network radio-frequency front-end control system according to any one of claims 1-5 based on OOK,
It is characterized in that, which is made of radio frequency front-end unit, radio frequency Integrated Service Digital Network unit and baseband processing unit；
The radio frequency front-end unit includes antenna, duplexer, amplifirer, low-noise amplifier, multichannel OOK demodulator, front end filter
Wave device group；
The radio frequency Integrated Service Digital Network unit includes rear end filter group, multichannel OOK demodulator；
The baseband processing unit includes radio-frequency receiving-transmitting channel, scheduler module, base-band digital processing module；
The radio-frequency front-end TTL control signal of output is modulated in the radio frequency Integrated Service Digital Network unit not by the scheduler module respectively
With on multichannel OOK demodulator, modulated signal is obtained；
The modulated signal is transmitted to front end filter group via rear end filter group；
Modulated signal is carried out separation to obtain corresponding control signal and be used to control the duplex by the front end filter group
Device, amplifirer, low-noise amplifier.
7. a kind of Integrated Service Digital Network radio-frequency front-end control system based on OOK according to claim 6, which is characterized in that described
Multichannel OOK demodulator carrier frequency is different.
8. a kind of Integrated Service Digital Network radio-frequency front-end control system based on OOK according to claim 7, which is characterized in that described
Base-band digital processing module is used to carry out information exchange with upper layer application.
9. a kind of Integrated Service Digital Network radio-frequency front-end control system based on OOK according to claim 8, which is characterized in that described
Scheduler module is also used to control the completion of radio-frequency receiving-transmitting channel and the information exchange between the amplifirer, low-noise amplifier.
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| CN112928992A (en) * | 2019-12-05 | 2021-06-08 | 京信通信技术(广州)有限公司 | OOK modulation-demodulation circuit |
| CN113098819A (en) * | 2021-04-01 | 2021-07-09 | 成都星联芯通科技有限公司 | Fractional-multiple subcarrier interval frequency offset estimation method for low-orbit broadband satellite system |
| CN113572493A (en) * | 2020-11-04 | 2021-10-29 | 中兴通讯股份有限公司 | Signal transmitting/receiving device, signal amplifying device, and method for operating communication system |
| CN114286355A (en) * | 2021-12-30 | 2022-04-05 | 陕西天基通信科技有限责任公司 | Active remote unit and indoor coverage system based on same |
| CN115102568A (en) * | 2022-07-12 | 2022-09-23 | 东集技术股份有限公司 | Radio frequency circuit, control method and device, radio frequency read-write equipment and storage medium |
| CN115333562A (en) * | 2022-07-06 | 2022-11-11 | 锐石创芯(深圳)科技股份有限公司 | Radio frequency front-end chip and radio frequency front-end module |
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| CN112928992A (en) * | 2019-12-05 | 2021-06-08 | 京信通信技术(广州)有限公司 | OOK modulation-demodulation circuit |
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| CN115102568A (en) * | 2022-07-12 | 2022-09-23 | 东集技术股份有限公司 | Radio frequency circuit, control method and device, radio frequency read-write equipment and storage medium |
| CN115102568B (en) * | 2022-07-12 | 2023-10-24 | 东集技术股份有限公司 | Radio frequency circuit, control method and device, radio frequency read-write equipment and storage medium |
| CN115396996A (en) * | 2022-10-25 | 2022-11-25 | 深圳芯盛思技术有限公司 | Radio frequency intermittent working chopping power-saving system, method and chip |
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