CN108243132A - A kind of signal modulating method and device - Google Patents
A kind of signal modulating method and device Download PDFInfo
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- CN108243132A CN108243132A CN201611229380.1A CN201611229380A CN108243132A CN 108243132 A CN108243132 A CN 108243132A CN 201611229380 A CN201611229380 A CN 201611229380A CN 108243132 A CN108243132 A CN 108243132A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
Abstract
The invention discloses a kind of signal modulating method and devices, belong to field of communication technology.The method includes：It is poor by target frequency when presetting carriers carry baseband digital signal to be determined according to the first data transfer rate, and target frequency difference is the difference preset in the frequency spectrum for the modulated signal for it is expected to obtain between the frequency of carrier wave and the frequency of an order harmonics；Target modulation index, the bandwidth for the modulated signal that target modulation index it is expected to obtain for control are determined from the modulation index range for meeting the first modulation condition；According to target frequency difference and target modulation index, target sub-carriers are determined；According to default carrier wave and target sub-carriers, baseband digital signal is modulated.The present invention determines the target sub-carriers for controlling default carrier frequency by the first data transfer rate and the first modulation condition, within the scope of the signal bandwidth of modulated signal is controlled to be in the narrow bandwidth of demand, can effectively improve spectrum efficiency.
Description
Technical field
The present embodiments relate to field of communication technology, more particularly to a kind of signal modulating method and device.
Background technology
In a communications system, the baseband signal for information source is enable to generate is transmitted in the hf channel of finite bandwidth, is needed
Carrier modulation is carried out to baseband signal.The principle of modulation is i.e. with baseband signal to certain parameters (amplitude, frequency or the phase of carrier wave
Position) it is controlled, these parameters is made to change with the variation of baseband signal, are ultimately formed modulated centered on carrier frequency
Signal.Wherein, for the baseband signal of carrier wave parameter to be controlled to be known as modulated signal.When modulated signal is analog signal, the tune
Process processed is known as analog-modulated, and when modulated signal is digital signal, which is known as digital modulation.
In the relevant technologies, on-off keying (On-Off Keying, OOK) modulation is one kind of digital modulation, mainly passes through number
Word signal controls the amplitude of carrier wave.As shown in Figure 1A, when digital signal sends 1, the modulated signal width after being modulated by OOK
Spend constant, as carrier wave is in itself；When digital signal sends 0, the modulated signal amplitude after being modulated by OOK is 0.Frequency tune
It is mainly the frequency that carrier wave is controlled by modulated signal to make (Frequency Modulation, FM), as shown in Figure 1B, modulation letter
Number for sine wave, the frequency of carrier wave is controlled by modulated signal in a manner of FM, obtains FM waves as shown in Figure 1B.
OOK modulation due to only digital signal send 1 when radiation energy, OOK modulation be most save energy modulation
Mode.In OOK modulation, since most of signal is sent with extremely low energy, when receiving terminal is demodulated just
Very high signal-to-noise ratio is needed, and the signal quality of modulated signal is highly susceptible to the shadow of channel non-ideal factor in transmission process
It rings, therefore, the modulated signal antinoise of OOK modulation and anti fading performance are poor.In addition, the power density spectrum according to modulated signal
It is found that the signal bandwidth for the modulated signal that OOK is modulated is twice of modulated signal, therefore, in transmission process, need to account for
With higher bandwidth.In the frequency spectrum of the modulated signal of FM modulation, other than carrier component, also there are many side frequency components, because
This is in transmission process, it is also desirable to occupy higher bandwidth.
Invention content
In order to solve the problems, such as that the modulated signal of OOK modulation and FM modulation acquisitions occupied bandwidth in transmission process is excessively high,
An embodiment of the present invention provides a kind of signal modulating method and devices.The technical solution is as follows：
In a first aspect, a kind of signal modulating method is provided, the method includes：
It is poor by target frequency when presetting carriers carry baseband digital signal to be determined according to the first data transfer rate, and described first
Data transfer rate is it is expected the data transfer rate that the modulated signal obtained can reach, and the target frequency difference it is expected the modulated of acquisition to be described
The difference between the frequency of carrier wave and the frequency of an order harmonics is preset described in the frequency spectrum of signal；
Target modulation index is determined from the modulation index range for meeting the first modulation condition, the target modulation index is used
In the bandwidth for controlling the modulated signal for it is expected to obtain；
According to the target frequency difference and the target modulation index, target sub-carriers are determined, the target sub-carriers are used
It is controlled in the frequency to the default carrier wave；
According to the default carrier wave and the target sub-carriers, the baseband digital signal is modulated.
It should be noted that the first data transfer rate is determined according to user demand, it that is to say, baseband digital signal is through toning
After system, data transfer rate reaching, disclosure satisfy that user demand it is expected.In addition, the embodiment of the present invention further defines the first modulation
Condition, first modulation condition are the conditions that meet of modulated signal needs for it is expected to obtain, it is assumed that modulated signal meet this first
Modulation condition, then the signal bandwidth of the modulated signal will be limited in it is relatively narrow within the scope of, therefore by using this first number
The target sub-carriers and baseband digital signal determined according to rate and first modulation condition are modulated default carrier wave, obtain
Modulated signal is exactly the modulated signal for it is expected to obtain.
In embodiments of the present invention, due to can be determined in modulated process according to the first data transfer rate and the first modulation condition
For controlling the target sub-carriers of default carrier frequency, therefore, can by the target sub-carriers to preset carrier wave frequency into
Row modulation, so as to obtain it is expected acquisition, the smaller modulated signal of bandwidth.
Optionally, it is described that target modulation index is determined from the modulation index range for meeting the first modulation condition, including：
According to first modulation condition, from the correspondence between the modulation condition of storage and modulation index range,
Obtain corresponding modulation index range；
A modulation index is randomly choosed from the modulation index range of acquisition as the target modulation index.
Wherein, the first modulation condition can be a numberical range specified, therefore, can according to first modulation condition
To determine corresponding modulation index range, and one can be selected from the modulation index range according to modulation demand
Modulation index to be achieved is thought, as target modulation index.
In embodiments of the present invention, the signal band of modulated signal due to target modulation index for expectation to be controlled to obtain
Therefore width, according to the first modulation condition, determines modulation index range, and the selection target modulation index from modulation index range,
It can realize the control of the signal bandwidth of the modulated signal to finally obtaining, that is to say, be selected from modulation index range different
Modulation index as target modulation index, the modulated signal of unlike signal bandwidth will be obtained.
Optionally, it is described according to the target frequency difference and the target modulation index, determine target sub-carriers, including：
The frequency of the target sub-carriers is determined according to the target frequency difference；
According to the target frequency difference and the target modulation index, the amplitude of the target sub-carriers is determined；
The target sub-carriers are determined according to the frequency of the target sub-carriers and amplitude.
It should be noted that the frequency due to presetting carrier wave in the frequency spectrum for the modulated signal that target frequency difference is expectation acquisition
Therefore difference between the frequency of an order harmonics, the frequency of target sub-carriers is determined according to the target frequency difference, be equivalent to really
Periodically hope the frequency of harmonic component in the frequency spectrum of the modulated signal obtained.Later, referred to according to the target frequency difference and target modulation
The amplitude of the determining target sub-carriers of number, that is to say, be determined to target for meeting the first modulation condition and the first data transfer rate
The amplitude of carrier wave.When the frequency and amplitude of target sub-carriers determine that target sub-carriers determine.
In embodiments of the present invention, since target sub-carriers are determined by target frequency difference and target modulation index,
Therefore, when being modulated using the target sub-carriers to the frequency for presetting carrier wave, obtained modulated signal will it is expected to obtain
Modulated signal.
Optionally, it is described according to the target frequency difference and the target modulation index, determine the target sub-carriers
Amplitude, including：
According to the target frequency difference and the target modulation index, from the difference on the frequency of storage, modulation index and amplitude
Between correspondence in, obtain corresponding amplitude；
The amplitude got is determined as to the amplitude of the target sub-carriers.
It should be noted that during signal modulation, for the more convenient amplitude for more efficiently determining target sub-carriers
Value, it may be predetermined that the correspondence of multiple difference on the frequencies, modulation index and amplitude, and stored.When determining mesh
It, then can be according to target frequency difference and target modulation index, directly from the difference on the frequency of storage, modulation when marking the amplitude of subcarrier
Corresponding amplitude is obtained in correspondence between index and amplitude.
Optionally, described according to the target frequency difference and the target modulation index, difference on the frequency, modulation from storage refer to
In correspondence between number and amplitude, before obtaining corresponding amplitude, further include：
By the relationship between Bessel function and modulation index, the modulation index for meeting first modulation condition is determined
Range；
It is poor according to the target frequency, determine the frequency of the target sub-carriers；
According to the frequency of the target sub-carriers, multiple modulation indexs are determined, the multiple modulation index is the target
The amplitude of subcarrier takes the modulation index obtained during multiple and different amplitudes；
Selection is located at the modulation index in the range of the modulation index from the multiple modulation index；
The corresponding amplitude of modulation index of the target frequency poor, selection modulation index and selection is stored in described
In correspondence between difference on the frequency, modulation index and amplitude.
It should be noted that due to determine target sub-carriers amplitude need from the difference on the frequency of storage, modulation index and
It is obtained in correspondence between amplitude, therefore, before acquisition, needs first to obtain the correspondence.
In embodiments of the present invention, according to the first modulation condition, modulation index range is determined by Bessel function；It
Afterwards, due to the frequency of target sub-carriers it has been determined that therefore, taking different amplitudes for target sub-carriers, determining multiple and different
Subcarrier, and thereby determine that multiple modulation indexs.According to aforementioned determining modulation index range, selected from multiple modulation indexs
Modulation index in the range of modulation index, so as to obtain the correspondence between difference on the frequency, modulation index and amplitude, when
When carrying out signal modulation, only need to target sub-carriers can directly be determined according to target frequency difference and target modulation index, be signal
Modulation brings facility.
Optionally, first modulation condition includes at least one of the following conditions：
Preset described in first signal spectrum signal amplitude value in signal amplitude value and the second signal frequency spectrum of carrier wave it
Between difference be more than the first numerical value, first signal spectrum for baseband digital signal send 1 when it is described it is expected obtain it is modulated
The frequency spectrum of signal, the frequency spectrum of the modulated signal for it is expected to obtain when the second signal frequency spectrum sends 0 for baseband digital signal；
The signal amplitude value of an order harmonics and the signal amplitude in the second signal frequency spectrum in first signal spectrum
Difference between value is less than second value；
The signal amplitude value of the second harmonic and its higher order harmonics is compared to the described second letter in first signal spectrum
Signal amplitude value in number frequency spectrum is pressed third value.
It should be noted that when modulated signal meets first modulation condition, the second harmonic and its higher order harmonics will
It can be ignored, that is to say, the signal bandwidth of the modulated signal will be limited within the frequency range of two order harmonics.
In embodiments of the present invention, since first modulation condition is determining according to demand, and different first is modulated
Condition that is to say the different modulation index of correspondence, the first different modulation conditions will obtain the signal of different modulated signals
Therefore bandwidth, can control the signal bandwidth of the modulated signal finally obtained according to the first different modulation conditions is set.
Second aspect provides a kind of device of signal modulation, and the modulating apparatus, which has, realizes above-mentioned first party
The function of signal modulating method in face.The modulating apparatus includes at least one module, which is used to implement
The signal modulating method that above-mentioned first aspect is provided.
The third aspect, an embodiment of the present invention provides a kind of computer storage media, for storing above-mentioned signal modulation dress
Computer software instructions used or storage are put for performing the program involved by the modulating apparatus of above-mentioned second aspect.
The technique effect that embodiments of the present invention second aspect and the third aspect are obtained is corresponding with first aspect
The technique effect that technological means obtains is approximate, repeats no more herein.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：In embodiments of the present invention, the first data
Rate is determined according to user demand, that is to say, baseband digital signal after ovennodulation, it is expected it is reaching, disclosure satisfy that use
The data transfer rate of family demand.In addition, the first modulation condition is the condition that the modulated signal needs for it is expected to obtain meet, it is assumed that modulated letter
Number meet first modulation condition, then the signal bandwidth of the modulated signal will be limited in it is relatively narrow within the scope of, therefore, according to
First data transfer rate and the first modulation condition determine for controlling the target sub-carriers of default carrier frequency in modulated process, so as to
The frequency for presetting carrier wave is modulated, can obtain it is expected acquisition, the smaller modulated signal of bandwidth, that is to say, according to this
The signal modulating method of inventive embodiments is modulated signal, can according to demand control the signal bandwidth of modulated signal
Within the scope of relatively narrow, so as to effectively improve spectrum efficiency.
Description of the drawings
Figure 1A is OOK modulation principles schematic diagram provided in an embodiment of the present invention；
Figure 1B is FM modulation principles schematic diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of application scenario diagram of signal modulating method provided in an embodiment of the present invention；
Fig. 3 is a kind of structure diagram of transmitter provided in an embodiment of the present invention；
Fig. 4 A are the flow charts according to a kind of signal modulating method shown in an exemplary embodiment；
Fig. 4 B are a kind of Bessel function curve graphs provided in an embodiment of the present invention；
Fig. 4 C are to digitize schematic diagram according to a kind of triangular wave shown in an exemplary embodiment；
Fig. 5 is the block diagram according to a kind of modulating apparatus shown in an exemplary embodiment.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 2 is the application scenario diagram according to a kind of signal modulating method shown in an exemplary embodiment.As shown in Fig. 2,
Include electrocardiography transducer 201, pulse transducer 202, motion sensor 203, personal mobile equipment in the application scenarios
204th, base station 205, terminal 206, intelligent refrigerator 207, fixed-line telephone 208.
With the development of science and technology, human body health monitoring system has progressed into people’s lives.It is carry-on by human body
The monitoring devices such as the electrocardiography transducer 201 of wearing, pulse transducer 202, motion sensor 203, can measure human body sex character
Parameter.Later, monitoring device can be connect by purple honeybee (ZigBee) agreement with the mobile equipment 204 of individual, carry out information exchange.
Meanwhile the mobile equipment 204 of the individual can also pass through bluetooth (Bluetooth) agreement or WLAN (Wireless
Local Area Networks, WLAN) agreement is connect with terminal 206 or general packet radio service technology (General
Packet Radio Service, GPRS) communicate with base station 205, so as to fulfill to such as intelligent refrigerator 207 in family,
The control of 208 grade smart home devices of fixed-line telephone.Wherein, when monitoring device and the mobile equipment 204 of individual are assisted by ZigBee
It discusses and communicates either when personal mobile equipment 204 passes through Bluetooth or WLAN or communication with terminal 206 or individual moves
When dynamic equipment is communicated by GPRS with base station 205, signal modulating method pair provided in an embodiment of the present invention may be used
The baseband digital signal to be sent is modulated, and can be included in the equipment of transmission signal provided in an embodiment of the present invention
Modulating apparatus.Certainly, in practical application, signal modulating method provided in an embodiment of the present invention can also be answered applied to other
With scene, for example, in office space, multiple stage computers, printer and wireless phone for being attached by ultra wide band etc..
Fig. 3 is by signal according to a kind of signal modulating method using the embodiment of the present invention shown in an exemplary embodiment
The transmitter emitted, as shown in figure 3, the transmitter includes reference signal end 01, baseband digital signal end 02, control word end
03rd, mixed type phaselocked loop 04, gain control module 05, power amplifier 06 and difference sigma modulator 07.Wherein, mixed type is locked
Phase ring 04 include charge pump/phase frequency detector 11, low-pass filter 12, numerical control/voltage controlled oscillator 13, binary system phase discriminator 14,
Digital filter 15, difference sigma modulator 16, thermometer code control module 17, current mode logic circuits 18 and frequency divider 19,
Wherein, charge pump/phase frequency detector 11, low-pass filter 12, numerical control/voltage controlled oscillator 13 form the mould of mixed type phaselocked loop 04
Intend branch, binary system phase discriminator 14, digital filter 15, difference sigma modulator 16, thermometer code control module 17 and numerical control/pressure
Control the digital branch that oscillator 13 forms mixed type phaselocked loop 04.
It should be noted that reference signal end 01 and the input terminal 11a and binary system of charge pump phase frequency detector 11 reflect
The input terminal 14a connections of phase device 14, the output terminal 11b of the charge pump phase frequency detector 11 and input terminal 12a of low-pass filter 12,
The output terminal 12b of low-pass filter 12 is connect with the input terminal 13a of numerical control/voltage controlled oscillator 13.Binary system phase discriminator 14 it is defeated
Outlet 14b is connect with the input terminal 15a of digital filter 15, output terminal 15b and the difference sigma modulator of digital filter 15
16 input terminal 16a connections, the output terminal 16b of difference sigma modulator 16 connect with the input terminal 17a of thermometer code control module 17
It connects, the output terminal 17b of thermometer code control module 17 is connect with the input terminal 13a of numerical control/voltage controlled oscillator 13.Baseband digital signal
End 02 is connect with the input terminal 05a of gain control module 05, output terminal 05b and the numerical control/voltage controlled oscillation of gain control module 05
The input terminal 13a connections of device 13, control word end 03 are connect with the input terminal 13a of numerical control/voltage controlled oscillator 13.Numerical control/voltage-controlled is shaken
The output terminal 13b for swinging device 13 is connect with the input terminal 06a of power amplifier 06, meanwhile, the output terminal of numerical control/voltage controlled oscillator 13
13b is also connect with the input terminal 18a of current mode logic circuits 18, output terminal 18b and the frequency dividing of current mode logic circuits 18
The input terminal 19a connections of device 19, the output terminal 19b of the frequency divider 19 and input terminal 11a and two of charge pump phase frequency detector 11
The input terminal 14a connections of system phase discriminator 14.In addition, control word end 03 can also be with the input terminal of difference sigma modulator 07
07a connections, the output terminal 07b of difference sigma modulator 07 are connect with the input terminal 19a of frequency divider 19.
In practical applications, the reference signal that reference signal end 01 exports and the feedback signal difference that frequency divider 19 exports are defeated
Enter to simulate branch and digital branch, in branch is simulated, charge pump phase frequency detector 11 is by reference signal and the phase of feedback signal
Position or frequency are compared, and obtain phase difference or difference on the frequency, and the phase difference or difference on the frequency are converted to defeated after current signal
Go out, which is converted voltage output in order to control by low-pass filter 12, which is used to control numerical control/voltage controlled oscillation
The frequency of oscillation of device 13.In digital branch, feedback signal and reference signal are compared by binary system phase discriminator 14, obtain phase
Potential difference or difference on the frequency, and the phase difference or difference on the frequency are converted into voltage signal, to drive digital filter 15, through digital filtering
After difference sigma modulator 16, numerical control/voltage-controlled is controlled by thermometer code control module 17 for obtained signal after device 15 filters
The frequency of oscillation of oscillator 13.
Baseband digital signal end exports baseband digital signal, and the baseband digital signal after gain control module 05 by inputting
Numerical control/voltage controlled oscillator 13, signal to be controlled to generate different frequency deviations.The modulated signal exported through numerical control/voltage controlled oscillator 13
The signal of permanent envelope is exported through power amplifier 06, meanwhile, the modulated signal exported through numerical control/voltage controlled oscillator 13 passes through electric current
Mode logic circuits 18 and frequency divider 19 divide, the input terminal as feedback signal input mixed type phaselocked loop 04.
In transmitter provided in an embodiment of the present invention, using mixed type phaselocked loop come stabilization signal frequency, compared to complete
Digital phase-locked loop reduces the complexity of design, for analog phase-locked look, then reduces electric leakage and chip area, separately
Outside, in transmitter provided in an embodiment of the present invention, baseband digital signal is only applied directly to numerical control/pressure by gain control module
It controls on oscillator, and in two points modulation, baseband digital signal also needs while voltage controlled oscillator progress high point modulation is inputted
Low spot modulation is carried out by crystal oscillator, to ensure good low frequency response, and due to should by voltage controlled oscillator,
Pass through crystal oscillator again, it is therefore desirable to carry out gain match.The transmitter provided in the embodiment of the present invention, compared to 2 points
Modulation, is eliminated the low frequency response process being modulated using crystal oscillator, that is to say, used only in the embodiment of the present invention
Therefore high point modulation in two points modulation, also with regard to the gain match without carrying out two points modulation again, reduces the complexity of design
Property.In addition, transmitter provided in an embodiment of the present invention uses the design of low supply voltage since system complexity reduces,
Ensure low-power consumption.
Fig. 4 A are according to a kind of flow chart of signal modulating method shown in an exemplary embodiment, referring to Fig. 4 A, the party
Method includes：
Step 401：It is poor by target frequency when presetting carriers carry baseband digital signal to be determined according to the first data transfer rate,
First data transfer rate is it is expected the data transfer rate that the modulated signal obtained can reach, which is the modulated of expectation acquisition
The difference between the frequency of carrier wave and the frequency of an order harmonics is preset in the frequency spectrum of signal.
Under normal conditions, communication channel allow by the frequency bandwidth of signal be referred to as channel width.When this by
When signal is digital signal, channel width is characterized by data transfer rate.In a wireless communication system, since band resource is tight
, therefore, the simulation modulated signal obtained after being modulated by baseband digital signal to default carrier wave cannot have excessively high
Signal bandwidth, since current wireless communication system includes a large amount of digital device, under normal circumstances, channel width is adopted
It is characterized with data transfer rate, in this way, obtained simulation modulated signal just needs to be converted into digital modulated signal by sampling.When simulation
When adjusting the signal bandwidth of signal smaller, correspondingly, the modulated letter of number sampled by the modulated signal to the simulation
Number, in transmission, also there will be no excessively high data transfer rates.
Based on above-mentioned relation, when carrying out carrier modulation to baseband digital signal, first can be determined according to bandwidth demand
Data transfer rate, first data transfer rate that is to say the data transfer rate that can reach of modulated signal for it is expected to obtain, according to first data transfer rate,
It is assured that the signal bandwidth for the simulation modulated signal for it is expected to obtain.The half of the signal bandwidth is determined as target frequency
Rate is poor, due to presetting the frequency of carrier wave and the frequency of an order harmonics in the frequency spectrum for the modulated signal that the target frequency difference is expectation acquisition
Difference between rate, therefore, the signal bandwidth for being equivalent to the modulated signal for obtaining the expectation have been limited in two order harmonics
Frequency range within.
For example, when the signal bandwidth determined according to the first data transfer rate is 2fm, the frequency for presetting carrier wave is fcWhen, then, just
Target frequency difference is determined as fm, that is to say, it is expected to preset carrier wave f in the frequency spectrum of the modulated signal obtainedcWith the frequency of an order harmonics
Difference between rate is fm, since the signal bandwidth of modulated signal for it is expected to obtain is 2fm, therefore, it is equivalent to signal bandwidth
It has been limited in fc-fmAnd fc+fmBetween.
After target frequency difference is determined, can target modulation index be determined, and from there through step by step 402
Rapid 403 determining target sub-carriers, so that baseband digital signal is it is expected to obtain by the modulated signal obtained after modulation
Adjust signal.
Step 402：Target modulation index, the target modulation are determined from the modulation index range for meeting the first modulation condition
The bandwidth for the modulated signal that index it is expected to obtain for control.
Based on the description in step 401, after target frequency difference is determined, it is also necessary to determine mesh by the first modulation condition
Modulation index is marked, to facilitate follow-up further determining target sub-carriers, so as to obtain the modulated signal for it is expected to obtain.
It should be noted that first modulation condition can include at least one of the following conditions：
Between signal amplitude value in (1) first signal spectrum in the signal amplitude value and second signal frequency spectrum of default carrier wave
Difference be more than the first numerical value；
Between signal amplitude value in (2) first signal spectrums in the signal amplitude value and second signal frequency spectrum of an order harmonics
Difference be less than second value；
The signal amplitude value of the second harmonic and its higher order harmonics is compared to second signal frequency spectrum in (3) first signal spectrums
In signal amplitude value be pressed third value.
Wherein, the frequency spectrum of the modulated signal obtained, the second letter it is expected when the first signal spectrum sends 1 for baseband digital signal
Number frequency spectrum it is expected the frequency spectrum of the modulated signal obtained when sending 0 for baseband digital signal.First numerical value, second value and third number
Value is can be determined according to different standard and demand.For example, in embodiments of the present invention, the first numerical value can be determined
For 10dB (decibel), second value is determined as 7dBm (decibel millivolt), and third value is determined as 19dB.
Certainly, in order to which determining modulation index range is more accurate, so as to preferably be controlled by target modulation index
The signal bandwidth of signal is adjusted, which can also be including any two in above three condition or including above-mentioned
All three conditions when the condition that first modulation condition includes is more, are carried using target that first modulation condition determines
After wave is to default carrier modulation, the signal bandwidth of obtained modulated signal will more meet the signal band for the modulated signal for it is expected acquisition
It is wide.
Meet it should be noted that first modulation condition is the modulated signal provided in an embodiment of the present invention for it is expected acquisition
Modulation condition.It that is to say, when baseband digital signal sends 1, obtain the first signal spectrum of modulated signal, work as base-band digital
When signal sends 0, the second signal frequency spectrum of modulated signal is obtained, the corresponding signal amplitude value of each frequency in first signal spectrum
With the signal amplitude value in second signal frequency spectrum only when meeting first modulation condition, step 401 could be realized by
The purpose of one bit-rate control bandwidth.
Further, it is assumed that baseband digital signal meets first modulation condition by the modulated signal obtained after modulation
When, since second order and its higher order harmonics have obtained significantly suppressing, when transmitting the modulated signal, it is possible to will
The second order and its higher order harmonics are ignored, and that is to say, when being equivalent to transmission, the signal bandwidth of the modulated signal is exactly two single orders
Difference on the frequency between the corresponding frequency of harmonic wave.It that is to say, if the corresponding signal width of each frequency component in the frequency spectrum of modulated signal
Angle value disclosure satisfy that first modulation condition, be equivalent to ensure that the signal bandwidth that can make the modulated signal meets the first number
According to rate.
For example, first modulation condition can include (2) and (3) in above-mentioned condition, that is to say, determining modulation index
Range must simultaneously meet (2) and (3), and only in this way, the target modulation index determined in the range of the modulation index could be controlled
The signal bandwidth for making the modulated signal finally obtained meets the first data transfer rate.
Since first modulation condition is the numberical range about signal amplitude value, according to first modulation condition
It can determine modulation index range.When the first modulation condition difference, different modulation index ranges is also just corresponded to.Therefore, from
Meeting the realization method of determining target modulation index in the modulation index range of the first modulation condition can be：According to the first modulation
Condition from the correspondence between the modulation condition of storage and modulation index range, obtains corresponding modulation index range；It
Afterwards, a modulation index is randomly choosed from the modulation index range of acquisition as target modulation index.
It should be noted that since modulation index range is from pair between the modulation condition of storage and modulation index range
It should be related to middle acquisition, therefore, before the modulation index range is obtained, need first according to the first different modulation conditions, really
Fixed correspondence between multiple modulation conditions and modulation index range.Wherein, according to the first modulation condition, shellfish plug can be passed through
Relationship in your function curve between modulation index and the signal amplitude value of each frequency component, to determine that modulation condition and modulation refer to
Correspondence between number range.
Wherein, since multiple signal amplitude values for being used to limit default carrier wave and harmonic wave can be included in the first modulation condition
Condition, therefore, can be according to modulation index in Bessel function curve and the relationship of the signal amplitude value of each frequency component, really
Surely meet modulation index range corresponding during each condition, so as to obtain multiple modulation index ranges；Later, it is more by what is determined
The intersection of a modulation index range is determined as the corresponding modulation index range of first modulation condition, and by first modulation condition
And determining modulation index range is stored in the correspondence between modulation condition and modulation index range.
Optionally, in order to save the system resource of modulating apparatus, can also directly be passed through according to the first modulation condition
Bessel function curve determines modulation index range, without the correspondence between modulation condition and modulation index range
It is stored.
Fig. 4 B are Bessel function curves provided in an embodiment of the present invention, it is assumed that the first current modulation condition for second order and
Its higher order harmonics is pressed more than 7dB, then it can be seen from Fig. 4 B when modulation index value between 1 to 1.5, presets
Difference between the corresponding signal amplitude value of carrier wave signal amplitude value corresponding with the second harmonic in more than 7dB, at this point, this
The corresponding modulation index range of one modulation condition is 1~1.5.
Optionally, since the modulation index range is determined according to the first modulation condition, in the modulation index model
Modulation index within enclosing disclosure satisfy that modulation requirement.And the size of modulation index determines the size of frequency deviation, modulation refers to
Number is bigger, and frequency deviation is then bigger, that is to say, when the modulated signal that baseband digital signal obtains after ovennodulation is adjusted not according to first
Before condition processed ignores the second harmonic and higher order harmonics, the actual signal bandwidth of the modulated signal will be wider.Therefore,
For the true bandwidth of the ideal modulated signal of acquisition, can also according to demand be selected from the modulation index of acquisition corresponding
Modulation index is as target modulation index.
Step 403：According to target frequency difference and target modulation index, target sub-carriers are determined, which is used for
The frequency for presetting carrier wave is controlled.
During signal modulation, since the frequency for presetting carrier wave will be controlled by target sub-carriers, moreover,
In the frequency spectrum of the modulated signal of acquisition, each frequency component is corresponding be default carrier wave and target sub-carriers frequency, therefore, when
After determining target frequency difference and target modulation index, can target be determined according to the target frequency difference and target modulation index
Carrier wave；Target sub-carriers are determined according to the frequency of target sub-carriers and amplitude.
Wherein, according to target frequency difference and target modulation index, determining the realization method of target sub-carriers can be：According to
Target frequency difference determines the frequency of target sub-carriers；According to target frequency difference and target modulation index, difference on the frequency, tune from storage
In correspondence between index and amplitude processed, corresponding amplitude is obtained, and the amplitude of acquisition is determined as target
The amplitude of carrier wave.
In addition, by being formed just to single sine wave, single sawtooth wave and by multiple integer multiple frequency sine-wave superimposeds
The frequency spectrum and time domain waveform of string signal carry out comparison discovery, the sinusoidal signal formed by multiple integer multiple frequency sine-wave superimposeds
Spectral bandwidth is most narrow, therefore, chooses by the sinusoidal signal that multiple integer multiple frequency sine-wave superimposeds form as target sub-carriers,
Assuming that the time-domain expression of the target sub-carriers is A1sin(ωmt)+A2sin(2ωmt)+A3sin(3ωmT), wherein, A1、A2With
A3Amplitude for the target sub-carriers.It is poor according to target frequency, determine the frequency of the target sub-carriers, that is to say makes ωm=2 π
fm.Later, then according to the frequency of the determining target sub-carriers and target modulation index, difference on the frequency, modulation index from storage
In correspondence between amplitude, A is determined1、A2And A3。
Due to during true signal modulation, being not easy to determine the amplitude of target sub-carriers by multiple authentication
Value, therefore, before the amplitude of the target sub-carriers is determined, it may be predetermined that and store multiple difference on the frequencies, modulation index
Correspondence between amplitude when carrying out signal modulation, then directly can be selected therefrom pair according to above-mentioned realization method
The amplitude answered.
Wherein it is determined that and store the mode of operation of the correspondence between multiple difference on the frequencies, modulation index and amplitude can
Think：By the relationship between Bessel function and modulation index, the modulation index range for meeting the first modulation condition is determined；Root
According to the frequency of target sub-carriers, multiple modulation indexs are determined, multiple modulation indexs take multiple and different for the amplitude of target sub-carriers
Amplitude when obtained modulation index；Selection is located at the modulation index in the range of modulation index from multiple modulation indexs；It will
Target frequency is poor, the corresponding amplitude of modulation index of the modulation index and selection of selection is stored in difference on the frequency, modulation index and
In correspondence between amplitude.
According to the relationship of the signal amplitude value of modulation index and each frequency component in the Bessel function curve, can pass through
First modulation condition determines modulation index range；Since the frequency of target sub-carriers is it has been determined that therefore it may only be necessary to determine target
The amplitude of subcarrier, it is possible to determine the target sub-carriers.After modulation index determines, the amplitude for target sub-carriers takes more
A different amplitude, determines multiple target sub-carriers；Using multiple target sub-carriers, by the method for simulation, to same
A baseband digital signal is modulated, and is measured this and is modulated corresponding multiple modulation indexs using multiple target sub-carriers,
From multiple modulation index selection positioned at modulation index range modulation index, then by target frequency it is poor, select modulation
Index and the corresponding amplitude of the modulation index of selection are stored in the correspondence between difference on the frequency, modulation index and amplitude
In.
Further, during practical signal modulation, subcarrier is often using digital coding, for above-mentioned by multiple
The sinusoidal signal that the sine-wave superimposed of integer multiple frequency forms just needs very high over-sampling clock when being digitized, no
It is easy to implement.And compared to sinusoidal signal and other shapes, triangular wave then has better spectral characteristic, it is contemplated that by subcarrier
Digitized operability in the shape of selection target subcarrier, can also select triangular wave.
Fig. 4 C are a kind of triangular wave digitized process figures provided in this embodiment, as shown in Figure 4 C, when target sub-carriers
When shape is triangular wave, first, target sub-carriers are controlled by baseband digital signal.When baseband digital signal sends 1
When, output target sub-carriers in itself, when baseband digital signal sends 0, then export the straight line that amplitude is 0.Later, this is controlled
The target sub-carriers obtained after system carry out sampling digitizing by digital phase-locked loop, and pass through Fast Fourier Transform (FFT) and obtain to the end
Digitized result shown in a line.Finally, pass through the frequency of the digitized default carrier wave of triangular wave control, you can to obtain base
The corresponding modulated signal of band digital signal.
In practical applications, when being sent using transmitter shown in Fig. 3 to signal, is produced from baseband digital signal end 02
Raw baseband digital signal, and input gain control module 05, the baseband digital signal control the door electricity in gain control module 05
Road, and digitized target sub-carriers are finally exported by the output terminal 05b of gain control module 05.
Step 404：According to default carrier wave and target sub-carriers, baseband digital signal is modulated.
After target sub-carriers are determined, the frequency for presetting carrier wave is controlled by the target sub-carriers, wherein, referring to
Fig. 4 C when baseband digital signal sends 1, then control the frequency for presetting carrier wave by determining target sub-carriers, phase
When in exporting a FM wave, when baseband digital signal sends 0, then the frequency for keeping default carrier wave is constant, i.e., output is default carries
Wave is in itself.
Based on the description of step 401-403, due to target sub-carriers be by the data transfer rate for the modulated signal for it is expected to obtain with
And first modulation condition it is counter push away it is determining, therefore, by the target sub-carriers to preset carrier wave frequency control, output
Modulated signal is the modulated signal for it is expected to obtain.
In actual signal modulated process, when using signal modulating method provided in an embodiment of the present invention, by shown in Fig. 3
Transmitter send signal when, baseband digital signal is applied directly in gain control module 05, when baseband digital signal send 1
When, target sub-carriers remain unchanged, and when baseband digital signal sends 0, then amplitude-frequency is 0.Later, by gain control molding
Block 05 exports above-mentioned modulated digitized target sub-carriers.The digitized target sub-carriers enter numerical control/voltage controlled oscillation
Device 13 is modulated the frequency of default carrier wave that numerical control/voltage controlled oscillator 13 generates, and the modulated signal obtained after modulation passes through
The power amplifier 06 of permanent envelope exports, so as to obtain the modulated signal of permanent envelope.
In conclusion in embodiments of the present invention, the first data transfer rate is determined according to user demand, that is to say, base band
Digital signal it is expected data transfer rate reaching, disclosure satisfy that user demand after ovennodulation.In addition, the first modulation condition is
It is expected the condition that the modulated signal obtained needs meet, it is assumed that modulated signal meets first modulation condition, then the modulated signal
Signal bandwidth will be limited in it is relatively narrow within the scope of, therefore, tune is determined according to the first data transfer rate and the first modulation condition
For controlling the target sub-carriers of default carrier frequency during system, so as to be modulated to the frequency for presetting carrier wave, can obtain
To it is expected obtain, the smaller modulated signal of bandwidth, that is to say, signal modulating method according to embodiments of the present invention to signal into
Row modulation, can be according to demand by the control of the signal bandwidth of modulated signal within the scope of relatively narrow, so as to effectively improve frequency
Spectrum efficiency.In addition, since signal modulating method provided in an embodiment of the present invention is when baseband digital signal sends 1, carried to default
The frequency of wave is controlled, and during transmission 0, then export default carrier wave in itself, therefore, the modulated signal that the embodiment of the present invention obtains
Be the equal of the combination of FM waves and OOK waves, it is simple low in energy consumption not only to have had the advantages that OOK was realized, but also with FM noise immunities
Can be good the advantages of.
Fig. 5 is according to a kind of block diagram of modulating apparatus shown in an exemplary embodiment, referring to Fig. 5, the signal tune
Device processed includes：Processing module 501.
Wherein, processing module 501 is used to perform the step 401- steps 404 in above-described embodiment.
Optionally, processing module 501 is additionally operable to：
According to the first modulation condition, from the correspondence between the modulation condition of storage and modulation index range, obtain
Corresponding modulation index range；
A modulation index is randomly choosed from the modulation index range of acquisition as target modulation index.
Optionally, processing module 501 is additionally operable to：
The frequency of target sub-carriers is determined according to target frequency difference；
According to target frequency difference and target modulation index, the amplitude of target sub-carriers is determined；
Target sub-carriers are determined according to the frequency of target sub-carriers and amplitude.
Optionally, processing module 501 is additionally operable to：
According to target frequency difference and target modulation index, pair between the difference on the frequency of storage, modulation index and amplitude
In should being related to, corresponding amplitude is obtained；
The amplitude got is determined as to the amplitude of target sub-carriers.
Optionally, processing module 501 is additionally operable to：
By the relationship between Bessel function and modulation index, the modulation index model for meeting the first modulation condition is determined
It encloses；
According to the frequency of target sub-carriers, multiple modulation indexs are determined, multiple modulation indexs are the amplitude of target sub-carriers
Take the modulation index obtained during multiple and different amplitudes；
Selection is located at the modulation index in the range of modulation index from multiple modulation indexs；
By target frequency it is poor, selection modulation index and selection the corresponding amplitude of modulation index be stored in difference on the frequency,
In correspondence between modulation index and amplitude.
It should be noted that the first modulation condition includes at least one of the following conditions：
Between signal amplitude value in first signal spectrum in the signal amplitude value and second signal frequency spectrum of default carrier wave
Amplitude difference is more than the first numerical value, and the first signal spectrum it is expected the frequency spectrum of the modulated signal obtained when sending 1 for baseband digital signal,
Second signal frequency spectrum it is expected the frequency spectrum of the modulated signal obtained when sending 0 for baseband digital signal；
Between signal amplitude value in first signal spectrum in the signal amplitude value and second signal frequency spectrum of an order harmonics
Difference is less than second value；
The signal amplitude value of the second harmonic and its higher order harmonics is compared in second signal frequency spectrum in first signal spectrum
Signal amplitude value be pressed third value.
In embodiments of the present invention, the first data transfer rate is determined according to user demand, that is to say, baseband digital signal warp
After ovennodulation, data transfer rate reaching, disclosure satisfy that user demand it is expected.In addition, having formulated the first modulation condition, this first
Modulation condition is the condition that the modulated signal needs for it is expected to obtain meet, it is assumed that modulated signal meets first modulation condition, then
The signal bandwidth of the modulated signal will be limited in it is relatively narrow within the scope of, therefore, according to the first data transfer rate and first modulation item
Part is determined for controlling the target sub-carriers of default carrier frequency in modulated process, so as to being adjusted to the frequency for presetting carrier wave
System can obtain it is expected what is obtained, and the smaller modulated signal of bandwidth that is to say, signal modulation side according to embodiments of the present invention
Method is modulated signal, can be according to demand by the control of the signal bandwidth of modulated signal within the scope of relatively narrow, so as to have
The raising spectrum efficiency of effect.In addition, since signal modulating method provided in an embodiment of the present invention is in baseband digital signal transmission 1
When, when controlling the frequency for presetting carrier wave, and sending 0, then export default carrier wave in itself, therefore, the embodiment of the present invention obtains
The modulated signal obtained is the equal of the combination of FM waves and OOK waves, it is simple low in energy consumption not only to have had the advantages that OOK was realized, but also have
There is the advantages of FM noise robustness is good.
It should be noted that：Above-described embodiment provide modulating apparatus when being modulated to baseband digital signal,
It, can be as needed and by above-mentioned function distribution only with the division progress of above-mentioned each function module for example, in practical application
It is completed by different function modules, i.e., the internal structure of equipment is divided into different function modules, it is described above to complete
All or part of function.In addition, the modulating apparatus that above-described embodiment provides belongs to same with signal modulating method embodiment
One design, specific implementation process refer to embodiment of the method, and which is not described herein again.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete.Processing module 501 described in Fig. 5 can be realized by processor.The modulating apparatus can also include
Memory can be used for storing program code and data.Various components in the modulating apparatus are coupled, and are used for
It realizes such as signal modulating method involved in Fig. 4 A-4C described embodiments.The all or part of step of above-described embodiment
Relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer readable storage medium
In, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of signal modulating method, which is characterized in that the method includes：
It is poor by target frequency when presetting carriers carry baseband digital signal to be determined according to the first data transfer rate, first data
Rate is it is expected the data transfer rate that the modulated signal obtained can reach, and the target frequency difference is the modulated signal for it is expected to obtain
Frequency spectrum described in preset carrier wave frequency and an order harmonics frequency between difference；
Target modulation index is determined from the modulation index range for meeting the first modulation condition, the target modulation index is used to control
Make the bandwidth of the modulated signal for it is expected to obtain；
According to the target frequency difference and the target modulation index, determine target sub-carriers, the target sub-carriers for pair
The frequency of the default carrier wave is controlled；
According to the default carrier wave and the target sub-carriers, the baseband digital signal is modulated.
It is 2. according to the method described in claim 1, it is characterized in that, described from the modulation index range for meeting the first modulation condition
In determine target modulation index, including：
According to first modulation condition, from the correspondence between the modulation condition of storage and modulation index range, obtain
The modulation index range；
A modulation index is randomly choosed from the modulation index range of acquisition as the target modulation index.
3. method according to claim 1 or 2, which is characterized in that described according to the target frequency difference and the target
Modulation index determines target sub-carriers, including：
The frequency of the target sub-carriers is determined according to the target frequency difference；
According to the target frequency difference and the target modulation index, the amplitude of the target sub-carriers is determined；
The target sub-carriers are determined according to the frequency of the target sub-carriers and amplitude.
It is 4. according to the method described in claim 3, it is characterized in that, described according to the target frequency difference and the target modulation
Index determines the amplitude of the target sub-carriers, including：
According to the target frequency difference and the target modulation index, between the difference on the frequency of storage, modulation index and amplitude
Correspondence in, obtain corresponding amplitude；
The amplitude got is determined as to the amplitude of the target sub-carriers.
It is 5. according to the method described in claim 4, it is characterized in that, described according to the target frequency difference and the target modulation
Index, from the correspondence between the difference on the frequency of storage, modulation index and amplitude, before obtaining corresponding amplitude, also
Including：
By the relationship between Bessel function and modulation index, the modulation index model for meeting first modulation condition is determined
It encloses；
According to the frequency of the target sub-carriers, multiple modulation indexs are determined, the multiple modulation index is carried for target
The amplitude of wave takes the modulation index obtained during multiple and different amplitudes；
Selection is located at the modulation index in the range of the modulation index from the multiple modulation index；
The corresponding amplitude of modulation index of the target frequency poor, selection modulation index and selection is stored in the frequency
In correspondence between difference, modulation index and amplitude.
6. according to any methods of claim 1-5, which is characterized in that first modulation condition is included in the following conditions
It is at least one：
Between signal amplitude value described in first signal spectrum in the signal amplitude value and second signal frequency spectrum of default carrier wave
Difference is more than the first numerical value, the modulated signal for it is expected to obtain when first signal spectrum sends 1 for baseband digital signal
Frequency spectrum, the second signal frequency spectrum for baseband digital signal send 0 when it is described it is expected obtain modulated signal frequency spectrum；
Signal amplitude value in first signal spectrum in the signal amplitude value of an order harmonics and the second signal frequency spectrum it
Between difference be less than second value；
The signal amplitude value of the second harmonic and its higher order harmonics is compared to second signal frequency in first signal spectrum
Signal amplitude value in spectrum is pressed third value.
7. a kind of modulating apparatus, which is characterized in that described device includes：
Processing module, for being determined according to the first data transfer rate by presetting target frequency during carriers carry baseband digital signal
Difference, first data transfer rate are it is expected the data transfer rate that the modulated signal obtained can reach, and the target frequency difference is the phase
Hope the difference preset described in the frequency spectrum of the modulated signal obtained between the frequency of carrier wave and the frequency of an order harmonics；
The processing module is additionally operable to determine target modulation index from the modulation index range for meeting the first modulation condition, described
Target modulation index is used to control the bandwidth of the modulated signal for it is expected to obtain；
The processing module is additionally operable to, according to the target frequency difference and the target modulation index, determine target sub-carriers, institute
Target sub-carriers are stated for controlling the frequency of the default carrier wave；
The processing module is additionally operable to according to the default carrier wave and the target sub-carriers, and the baseband digital signal is carried out
Modulation.
8. device according to claim 7, which is characterized in that the processing module is additionally operable to：
According to first modulation condition, from the correspondence between the modulation condition of storage and modulation index range, obtain
Corresponding modulation index range；
A modulation index is randomly choosed from the modulation index range of acquisition as the target modulation index.
9. device according to claim 7 or 8, which is characterized in that the processing module is additionally operable to：
The frequency of the target sub-carriers is determined according to the target frequency difference；
According to the target frequency difference and the target modulation index, the amplitude of the target sub-carriers is determined；
The target sub-carriers are determined according to the frequency of the target sub-carriers and amplitude.
10. device according to claim 9, which is characterized in that the processing module is additionally operable to：
According to the target frequency difference and the target modulation index, between the difference on the frequency of storage, modulation index and amplitude
Correspondence in, obtain corresponding amplitude；
The amplitude got is determined as to the amplitude of the target sub-carriers.
11. device according to claim 10, which is characterized in that the processing module is additionally operable to：
By the relationship between Bessel function and modulation index, the modulation index model for meeting first modulation condition is determined
It encloses；
According to the frequency of the target sub-carriers, multiple modulation indexs are determined, the multiple modulation index is carried for target
The amplitude of wave takes the modulation index obtained during multiple and different amplitudes；
Selection is located at the modulation index in the range of the modulation index from the multiple modulation index；
The corresponding amplitude of modulation index of the target frequency poor, selection modulation index and selection is stored in the frequency
In correspondence between difference, modulation index and amplitude.
12. according to any devices of claim 7-11, which is characterized in that first modulation condition includes the following conditions
At least one of：
Between signal amplitude value described in first signal spectrum in the signal amplitude value and second signal frequency spectrum of default carrier wave
Difference is more than the first numerical value, the modulated signal for it is expected to obtain when first signal spectrum sends 1 for baseband digital signal
Frequency spectrum, the second signal frequency spectrum for baseband digital signal send 0 when it is described it is expected obtain modulated signal frequency spectrum；
Signal amplitude value in first signal spectrum in the signal amplitude value of an order harmonics and the second signal frequency spectrum it
Between difference be less than second value；
The signal amplitude value of the second harmonic and its higher order harmonics is compared to second signal frequency in first signal spectrum
Signal amplitude value in spectrum is pressed third value.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110246508A (en) * | 2019-06-14 | 2019-09-17 | 腾讯音乐娱乐科技（深圳）有限公司 | A kind of signal modulating method, device and storage medium |
| WO2022016602A1 (en) * | 2020-07-23 | 2022-01-27 | 锐迪科创微电子（北京）有限公司 | Signal transmitting method and apparatus, and electronic device, and readable storage medium |
| CN114978206A (en) * | 2022-05-17 | 2022-08-30 | 清华大学 | Quasi-balanced frequency shift keying modulation method and quasi-balanced frequency modulation transmitter |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010021047A1 (en) * | 1999-12-24 | 2001-09-13 | Hiroyuki Sasai | Optical transmission system and optical receiver |
| US20040146114A1 (en) * | 2002-07-26 | 2004-07-29 | John Gerrits | Method of communicating information between a transmitter and a receiver using ultrawideband signals |
| US7076168B1 (en) * | 1998-02-12 | 2006-07-11 | Aquity, Llc | Method and apparatus for using multicarrier interferometry to enhance optical fiber communications |
| CN1905682A (en) * | 2006-08-01 | 2007-01-31 | 南京大学 | Apparatus for duplex transmitting speech and data in video baseband transmission line |
| CN101361263A (en) * | 2006-01-31 | 2009-02-04 | 国际商业机器公司 | Receiver and integrated am-fm/iq demodulators for gigabit-rate data detection |
| CN101431498A (en) * | 2008-12-02 | 2009-05-13 | 清华大学 | Demodulation method and device for flexible sub-carrier modulation system |
| CN101588338A (en) * | 2009-04-15 | 2009-11-25 | 山东大学 | OFDM carrier frequency offset estimation method suitable for packet transmission |
| CN102664860A (en) * | 2012-05-22 | 2012-09-12 | 哈尔滨工业大学 | Method and device for modulating and demodulating single side band multi-carrier transmission signal |
| US8655261B2 (en) * | 2009-03-13 | 2014-02-18 | Raytheon Company | RF redirection module and system incorporating the RF redirection module |
| CN203563063U (en) * | 2012-06-14 | 2014-04-23 | 美国博通公司 | Near field communication circuit and near field communication device |
| CN104730478A (en) * | 2015-03-17 | 2015-06-24 | 上海理工大学 | Magnetic resonance phased array receiving method for orthogonal frequency-division multiplexing |
| CN105204033A (en) * | 2015-08-23 | 2015-12-30 | 哈尔滨工程大学 | Offset carrier wave modulation method based on time domain raised cosine pulse generalization |
-
2016
- 2016-12-27 CN CN201611229380.1A patent/CN108243132A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7076168B1 (en) * | 1998-02-12 | 2006-07-11 | Aquity, Llc | Method and apparatus for using multicarrier interferometry to enhance optical fiber communications |
| US20010021047A1 (en) * | 1999-12-24 | 2001-09-13 | Hiroyuki Sasai | Optical transmission system and optical receiver |
| US20040146114A1 (en) * | 2002-07-26 | 2004-07-29 | John Gerrits | Method of communicating information between a transmitter and a receiver using ultrawideband signals |
| CN101361263A (en) * | 2006-01-31 | 2009-02-04 | 国际商业机器公司 | Receiver and integrated am-fm/iq demodulators for gigabit-rate data detection |
| CN1905682A (en) * | 2006-08-01 | 2007-01-31 | 南京大学 | Apparatus for duplex transmitting speech and data in video baseband transmission line |
| CN101431498A (en) * | 2008-12-02 | 2009-05-13 | 清华大学 | Demodulation method and device for flexible sub-carrier modulation system |
| US8655261B2 (en) * | 2009-03-13 | 2014-02-18 | Raytheon Company | RF redirection module and system incorporating the RF redirection module |
| CN101588338A (en) * | 2009-04-15 | 2009-11-25 | 山东大学 | OFDM carrier frequency offset estimation method suitable for packet transmission |
| CN102664860A (en) * | 2012-05-22 | 2012-09-12 | 哈尔滨工业大学 | Method and device for modulating and demodulating single side band multi-carrier transmission signal |
| CN203563063U (en) * | 2012-06-14 | 2014-04-23 | 美国博通公司 | Near field communication circuit and near field communication device |
| CN104730478A (en) * | 2015-03-17 | 2015-06-24 | 上海理工大学 | Magnetic resonance phased array receiving method for orthogonal frequency-division multiplexing |
| CN105204033A (en) * | 2015-08-23 | 2015-12-30 | 哈尔滨工程大学 | Offset carrier wave modulation method based on time domain raised cosine pulse generalization |
Non-Patent Citations (1)
| Title |
|---|
| 张益宁，王志华等: ""一个1.9mW 750kb / s 2.4GHz F-OOK发送器，具有对称FM模板和高点调制PLL"", 《IEEE亚洲固态电路会议》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110246508A (en) * | 2019-06-14 | 2019-09-17 | 腾讯音乐娱乐科技（深圳）有限公司 | A kind of signal modulating method, device and storage medium |
| CN110246508B (en) * | 2019-06-14 | 2021-08-31 | 腾讯音乐娱乐科技（深圳）有限公司 | Signal modulation method, device and storage medium |
| WO2022016602A1 (en) * | 2020-07-23 | 2022-01-27 | 锐迪科创微电子（北京）有限公司 | Signal transmitting method and apparatus, and electronic device, and readable storage medium |
| CN114978206A (en) * | 2022-05-17 | 2022-08-30 | 清华大学 | Quasi-balanced frequency shift keying modulation method and quasi-balanced frequency modulation transmitter |
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