CN103684484A - Method for transmitting signals, transmitter and electronic device - Google Patents
Method for transmitting signals, transmitter and electronic device Download PDFInfo
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- CN103684484A CN103684484A CN201310717755.9A CN201310717755A CN103684484A CN 103684484 A CN103684484 A CN 103684484A CN 201310717755 A CN201310717755 A CN 201310717755A CN 103684484 A CN103684484 A CN 103684484A
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Abstract
The invention discloses a method for transmitting signals, a transmitter and an electronic device, which are used for resolving the technical problem that the transmitter must use a filter to eliminate or reduce the signal interference of a frequency acceptance band caused by local oscillator leakage during low frequency band communication in the prior art. The method is applied to the transmitter. The transmitter comprises a crystal oscillator which is used for generating local oscillator signals. The method comprises the steps of: determining the transmitting frequency of the signal to be transmitted according to uplink resources allocated by network; setting the output frequency of the crystal oscillator as a first frequency if the transmitting frequency of the signal to be transmitted is smaller than the set threshold value, wherein the frequency difference between the transmitting frequency band of the first frequency, the fundamental frequency of the crystal oscillator and the transmitting frequency and the corresponding frequency acceptance band meets the condition of a first preassigned relationship; transmitting the signal to be transmitted according to the set crystal oscillator.
Description
Technical field
The present invention relates to the communications field, particularly a kind of signal transmitting method, transmitter and electronic equipment.
Background technology
Radio-frequency front-end is the core component of communication equipment, and it is divided into two parts of transmitter and receiver.Wherein, transmitter is responsible for baseband signal to carry out rf conversion, power amplification, and in the mode of microwave through antenna transmission radiofrequency signal.
Transmitter is mainly by low pass filter, local oscillation signal source, IQ(In-phase and Quadrature-phase, homophase phase place and quadrature phase) modulator, gain amplifier, power amplifier, duplexer and antenna form.Although the principle of transmitter is fairly simple, its design relates between factors and each factor and interacting, and therefore, transmitter has determined performance and the cost of whole communication equipment to a great extent.
Conventional transmitter architecture comprises super-heterodyne architecture, zero-if architecture and digital-if architecture etc.But no matter adopt which kind of structure, transmitter all can use local oscillation signal generation system and IQ modulating system.Due to these two parts close together spatially, and can not reach desirable isolation between the local oscillator mouth of crystal oscillator and the mixing mouth of IQ modulator, therefore, in transmitter, just inevitably there will be the situation of local oscillator leakage, be that local oscillation signal exports frequency mixer to, formed mixing noise.
Especially in compared with low-frequency range communication, as the communications band lower than 1.4GHz, because emission band is very little with the spacing of corresponding frequency acceptance band, be generally 30～60MHz, the mixing noise that causes the local oscillator first-harmonic of transmitter or the leakage of low-order harmonic (being less than 5 times) to generate in frequency mixer overlaps with frequency acceptance band, and then produce and disturb to received signal, greatly reduce the quality of communication.
Take the residing emission band of tranmitting frequency Tx as [704,716], and corresponding frequency acceptance band is [734,746] (unit is MHz), the fundamental frequency f of crystal oscillator
0for 19.2MHz is example, be described as follows:
During as Tx=706MHz, the frequency that its second harmonic is revealed the mixing noise producing is 706 ± 2*19.2MHz, and wherein 706+2*19.2=744.4MHz, is positioned at frequency acceptance band, will exert an influence to received signal;
And for example during Tx=715MHz, the frequency that its first-harmonic is revealed the mixing noise producing is 715 ± 19.2MHz, and wherein 715+19.2=734.2MHz, is positioned at frequency acceptance band equally, can exert an influence to received signal.
Especially at the LTE(Long of high-speed communication Term Evolution, Long Term Evolution) communication in, impact is to received signal even more serious, it becomes the key issue of needing solution badly.
In prior art, in order to suppress the interference to frequency acceptance band of mixing noise that local oscillator leakage produces, generally in frequency mixer rear end, increase the filter of a correspondence, with this, filter out this mixing noise.
But, increasing a filter and not only can improve the manufacturing cost of whole transmitter, but also can increase the volume of transmitter, this runs counter to the development trend of current electronics miniaturization.
Summary of the invention
The application provides a kind of signal transmitting method and transmitter, for solving prior art, exists transmitter must use filter could eliminate or reduce the technical problem that in low-frequency range communication, local oscillator leakage disturbs receiving band signal.
First aspect, the application provides a kind of signal transmitting method, is applied to transmitter, and described transmitter comprises a crystal oscillator, for generation of local oscillation signal; Described method comprises: the tranmitting frequency of determining signal to be transmitted according to the ascending resource of network allocation; If the described tranmitting frequency of described signal to be transmitted is less than setting threshold, the output frequency of described crystal oscillator is set to first frequency, wherein, described first frequency and the fundamental frequency of described crystal oscillator and the emission band at described tranmitting frequency place meet the first predetermined relationship with the frequency difference of corresponding frequency acceptance band; According to the described signal to be sent of described crystal oscillator transmitting after arranging.
Preferably, described crystal oscillator comprises selector switch and M branch circuit; Wherein, when described selector switch connects N branch circuit in a described M branch circuit, the local oscillation signal of the frequency that described crystal oscillator output is corresponding with a described N branch circuit; Wherein, M is more than or equal to 2 positive integer, and N is the positive integer that is less than or equal to M; The output frequency of described crystal oscillator is set to first frequency, be specially: calculate described first frequency, control described selector switch and connect N the branch circuit corresponding with described first frequency, the output frequency that makes described crystal oscillator is described first frequency.
Preferably, described method also comprises: after described signal to be sent has been launched, control described selector switch and disconnect described branch circuit, the described fundamental frequency that the output frequency that makes described crystal oscillator is described crystal oscillator.
Preferably, described method also comprises: after described signal to be sent has been launched, the output frequency of described crystal oscillator is set to the described fundamental frequency of described crystal oscillator.
Second aspect, the application provides a kind of transmitter, comprising: crystal oscillator, for generation of local oscillation signal; Processor unit, for determine the tranmitting frequency of signal to be transmitted according to the ascending resource of network allocation, and the output frequency of described crystal oscillator is set to first frequency when described tranmitting frequency is less than setting threshold, so that described transmitter is according to the described signal to be sent of described crystal oscillator transmitting after arranging; Wherein, described first frequency and the fundamental frequency of described crystal oscillator and the emission band at described tranmitting frequency place meet the first predetermined relationship with the frequency difference of corresponding frequency acceptance band.
Preferably, described crystal oscillator comprises selector switch and M branch circuit; Wherein, when described selector switch connects N branch circuit in a described M branch circuit, the local oscillation signal of the frequency that described crystal oscillator output is corresponding with a described N branch circuit; Wherein, M is more than or equal to 2 positive integer, and N is the positive integer that is less than or equal to M.
Preferably, described processor unit is also for after having launched at described signal to be sent, and the output frequency of described crystal oscillator is set to the fundamental frequency of described crystal oscillator.
The third aspect, the application provides a kind of electronic equipment, and described electronic equipment comprises the transmitter described in second aspect.
The one or more technical schemes that provide in the embodiment of the present application, at least have following technique effect or advantage:
1, due in the embodiment of the present application, in compared with LF communication (as lower than 1.4GHz), launching opportunity is set the output frequency of crystal oscillator according to default formula, the mixing noise that the local oscillation signal of its output and the leakage of harmonic wave thereof are produced all drops on outside frequency acceptance band, and then in the situation that not using special filter, has eliminated the impact to received signal of mixing noise that local oscillator leakage produces; And then solved the transmitter existing in prior art and must use filter could eliminate or reduce the technical problem that in low-frequency range communication, local oscillator leakage disturbs receiving band signal.
2, due in the embodiment of the present application, at the processor of transmitter, determined after the output frequency of crystal oscillator, processor can indicate the selector switch in crystal oscillator to be connected in corresponding circuit branch, to oscillating circuit, increase extra inductance and electric capacity, and then required frequency corresponding to output, whole crystal oscillator output frequency switching mode is quick and cost is very low.
Accompanying drawing explanation
Fig. 1 is the flow chart of signal transmitting method in the embodiment of the present application;
Fig. 2 is the circuit diagram of crystal oscillator in the embodiment of the present application;
Fig. 3 is the another flow chart of signal transmitting method in the embodiment of the present application;
Fig. 4 is the schematic diagram of transmitter in the embodiment of the present application.
Embodiment
The application provides a kind of signal transmitting method, transmitter and electronic equipment, for solving prior art, exists transmitter must use filter could eliminate or reduce the technical problem that in low-frequency range communication, local oscillator leakage disturbs receiving band signal.
Below by accompanying drawing and specific embodiment, present techniques scheme is described in detail, be to be understood that the specific features in the embodiment of the present application and embodiment is the detailed explanation to present techniques scheme, rather than the restriction to present techniques scheme, in the situation that not conflicting, the technical characterictic in the embodiment of the present application and embodiment can combine mutually.
Embodiment 1
On the one hand, the application provides a kind of signal transmitting method by embodiment 1, is applied to a transmitter, and this transmitter comprises a crystal oscillator, for generation of local oscillation signal.This crystal oscillator is specifically as follows common crystal oscillation (SPXO), voltage type crystal oscillator (VCXO), temp. compensation type crystal oscillation (TCXO), thermostatic control formula crystal oscillation (OCXO), digit compensated crystal damage vibration (DCXO), microcomputer compensation crystal oscillator (MCXO) etc.Please refer to Fig. 1, this signal transmitting method comprises:
S101: the tranmitting frequency of determining signal to be transmitted according to the ascending resource of network allocation.
S102: if the tranmitting frequency of signal to be transmitted is less than setting threshold, the output frequency of crystal oscillator is set to first frequency, wherein, first frequency and the fundamental frequency of crystal oscillator and the emission band at tranmitting frequency place meet the first predetermined relationship with the frequency difference of corresponding frequency acceptance band;
S103: launch signal to be sent according to the crystal oscillator after arranging.
I*f
0, wherein, i=2*int[(f
b/ f
0+ 1)/2]+1, f
0for the fundamental frequency of crystal oscillator, f
bfor the emission band at the tranmitting frequency place frequency difference with corresponding frequency acceptance band, int[] represent to round;
The transmitter being applied in mobile terminal (as mobile phone) of take is below example, elaborates the embodiment of the present application technical scheme.
First, in step S101, when mobile phone is initiated main exhaling, can send to base station a call request (access burst pulse immediately), the broadcast channel of base station (Broadcast Channel, BCH) is received after this call request, can send the coding of a string relevant Traffic Channel to mobile phone.Mobile phone receives after this coding, through the processor decoding in mobile phone, gets the Traffic Channel (Traffic Channel, TCH) that base station broadcast channel (BCH) distributes, thereby can obtain network side, is the tranmitting frequency that signal to be transmitted distributes.
In step S102, when mobile phone, to have determined after the frequency of signal to be transmitted, the processor in mobile phone can judge whether this tranmitting frequency is less than a setting threshold.In actual conditions, the embodiment of the present application one of ordinary skill in the art can rationally arrange this setting threshold setting threshold according to actual needs, by this setting threshold, can mark off high-frequency band and low frequency frequency range, as being set to 1.4GHz, 1GHz or 800MHz etc. by this setting threshold, the embodiment of the present application will not limit this.
After tranmitting frequency that judged result shows signal to be transmitted is lower than setting threshold, handset processes device can calculate the first frequency corresponding with the tranmitting frequency of signal to be transmitted according to the first predetermined relationship.In the situation that crystal oscillator is definite, the fundamental frequency of crystal oscillator also determines, and the emission band at tranmitting frequency place is corresponding with frequency difference and the tranmitting frequency of corresponding frequency acceptance band, so first frequency is by the unique decision of tranmitting frequency of signal to be transmitted.
In the embodiment of the present application 1, for fear of or the local oscillator leakage that reduces crystal oscillator to receiving the interference of band signal, first frequency is set to the humorous wave frequency of crystal oscillator fundamental frequency signal; Preferably, other negative effects that cause during as output frequency for fear of even-order harmonic, can be defined as first frequency the odd harmonic frequencies of the fundamental frequency of crystal oscillator.
Concrete, the first predetermined relationship can be:
f=i*f
0；i=2*int[(f
b/f
0+1）/2]+1
Wherein f is first frequency, f
0for the fundamental frequency of crystal oscillator, f
bfor the emission band at the tranmitting frequency place frequency difference with corresponding frequency acceptance band, int[] be bracket function.Calculate the output frequency i*f of crystal oscillator
0, f in formula
0for the fundamental frequency of crystal oscillator, f
bfor the emission band at the tranmitting frequency place frequency difference with corresponding frequency acceptance band, int[] be bracket function.
The residing emission band of tranmitting frequency Tx take below as [704,716], and corresponding frequency acceptance band is [734,746] (unit is MHz), the fundamental frequency f of crystal oscillator
0for 19.2MHz is that example describes.
The frequency difference f of emission band and corresponding frequency acceptance band
b=746-704=42, i=2*int[(f
b/ f
0+ 1)/2]+1=2*int[(42/19.2+1)/2]+1=3.
Therefore, the output of crystal oscillator is set to 3*19.2=57.6, and the frequency of the mixing noise signal that first-harmonic (first harmonic) leakage of crystal oscillator output produces is Tx ± 57.6.
And Tx-57.6<716-57.6<734, and Tx+57.6>704+57.6=761.6>746, therefore, first-harmonic is revealed the mixed frequency signal producing and is positioned at outside frequency acceptance band, can not produce to received signal interference.
And the frequency of the harmonic wave (secondary and above harmonic wave) of crystal oscillator output is N*57.6, N is harmonic number, is not difficult to find out that Tx ± N*57.6 is more away from frequency acceptance band, also can not produce to received signal interference.
To sum up, when the output frequency of crystal oscillator is set to after the frequency of odd harmonic of crystal oscillator fundamental frequency signal, just can avoid the interference to received signal of mixing noise that local oscillator leakage produces.
The mode that the concrete output frequency by crystal oscillator changes to first frequency connects different branch circuits for the selector switch by crystal oscillator switches, and to increase extra capacitor and inductor in oscillating circuit, and then exports required frequency.
In step S103, after setting the output frequency of crystal oscillator, the local oscillation signal of the first frequency of the output of crystal oscillator is through phase-locked loop (Phase Locked Loop, PLL) be amplified to tranmitting frequency Tx and form carrier wave, carrier wave and baseband signal form modulated wave through IQ modulators modulate, amplify and go out by antenna transmission.
In addition, in actual conditions, step 101 also comprises the situation of mobile phone called party, the broadcast channel (BCH) that is specially base station sends call information from paging channel (Paging Channel, PCH), after mobile phone receives, at Random Access Channel (Random access channel, RACH) above to base station, send channel request, when remaining process is exhaled with mobile phone master, process is identical, and the embodiment of the present application does not repeat them here.
Therefore, adopt the embodiment of the present application technical scheme, can realize and in frequency mixer rear end, additionally not add that one obtains in situation for removing the filter of local oscillator leakage mixing noise, the mixing noise that elimination local oscillator leakage produces interference to received signal.
In actual conditions, the signal transmitting method in the embodiment of the present application, except being applied on the transmitter of mobile terminal, can also be applied on the transmitter of base station, and its concrete principle and mobile terminal are similar.
First, the processor of base station transmitter is determined the tranmitting frequency Tx of signal to be transmitted according to the ascending resource of network allocation;
Then, processor judges whether this tranmitting frequency Tx is less than setting threshold;
When this tranmitting frequency is less than setting threshold, the output frequency that processor calculates crystal oscillator according to the first predetermined relationship is first frequency, and indicate crystal oscillator to pass through switching over or change capacitor and inductor numerical value (or two kinds of mode combinations), so that the local oscillation signal that crystal oscillator output frequency is first frequency.
Then phase-locked loop is amplified to tranmitting frequency Tx by this output frequency and forms carrier wave, and carrier wave and baseband signal form modulated wave through IQ modulators modulate, amplifies and goes out by antenna transmission.
In the embodiment of the present application, in step S102, if determine that the tranmitting frequency of signal to be transmitted is greater than setting threshold, now, the output frequency of crystal oscillator will not adjust, and remain its fundamental frequency f
0constant.Transmitter will be based on this fundamental frequency local oscillation signal transmitting signal to be transmitted.
In actual applications, the following situation also likely occurring:
Only having a certain high order harmonic component (as being greater than the harmonic wave of 5 times) of the output frequency of crystal oscillator to leak to the mixing noise that frequency mixer generates just can be overlapping with frequency acceptance band, only have the mixing noise of the leakage generation of high-order harmonic wave just can produce to received signal interference, that is the i calculating is greater than 5.
Because the energy component of high-order harmonic wave is very little, the impact to received signal of the mixing noise of its generation can be ignored.Consider the demand that reduces power consumption, in such cases, can the output fundamental frequency of crystal oscillator be amplified to i*f
0, but allow the output frequency of crystal oscillator remain its fundamental frequency f
0.Certainly, if do not consider power consumption, only from the angle of avoiding local oscillator leakage to produce to received signal interference, consider, in this situation, the output frequency of crystal oscillator is adjusted into i*f
0remain desirable.
In addition, in the embodiment of the present application technical scheme, when being only limited to tranmitting frequency and being less than setting threshold, just can adjust based on default formula the output frequency of crystal oscillator.And in actual applications, the embodiment of the present application one of ordinary skill in the art can be limited to output frequency a certain frequency separation more neatly.That is, in step S102, only have the output frequency of definite signal to be transmitted to be positioned at a predeterminated frequency when interval, as be positioned at [60MHz, 800MHz] interval in time, just according to default formula i=2*int[(f
b/ f
0+ 1)/2]+1 is adjusted into i*f by the output frequency of crystal oscillator
0.Setting can allow the local oscillation signal adjustment of transmitter have more specific aim like this.The application is intended to protect this flexible program equally.
As previously mentioned, in the embodiment of the present application, provide following mode to realize and allow crystal oscillator output frequency for the local oscillation signal by the definite first frequency of the first predetermined relationship.The method is:
A selector switch and M branch circuit; Wherein, when selector switch connects N branch circuit in M branch circuit, crystal oscillator is exported the local oscillation signal of the frequency corresponding with N branch circuit; Wherein, M is more than or equal to 2 positive integer, and N is the positive integer that is less than or equal to M;
The output frequency of crystal oscillator is set to first frequency, is specially:
Calculate first frequency, control selector switch and connect N the branch circuit corresponding with first frequency, the output frequency that makes crystal oscillator is first frequency.
Below in conjunction with 2 pairs of said methods of accompanying drawing, be explained.
Because emission band and the frequency acceptance band spacing of low-frequency range are less, i.e. frequency difference f
bless (being generally 30～60MHz), the fundamental frequency of crystal oscillator is generally 15～30MHz in addition, therefore, in actual conditions according to formula i=2*int[(f
b/ f
0+ 1)/2]+1 i calculating is generally 3, so introduce below the output frequency of crystal oscillator by f
0be adjusted into 3*f
0mode.
The output frequency that calculates crystal oscillator when the processor of transmitter is 3*f
0, processor can send switching command to crystal oscillator, and crystal oscillator responds this instruction, and it is 3*f that selector switch k is connected to output frequency
0corresponding circuit branch.
In Fig. 2, JT is crystalline material, C
1=C
2=0.2pF, when selector switch k disconnects, output fundamental frequency is 26MHz;
And C
3=0.036pF, L
3=140uH,, when K is closed, output frequency will become to 26*3=78MHz.
Visible, by the operating state of switching selection switch k, make its closed or connection branch circuit, can realize the output frequency of crystal oscillator at f
0and 3*f
0between switch.
For i=5,7,9 ... etc. situation, as long as increase corresponding circuit branch, and reasonable capacitance and the inductance value in initialization circuit branch, make when selector switch connects this circuit branch, to export respective frequencies value, in this embodiment of the present application, give an example no longer one by one.
Example is that selector switch is realized the local oscillation signal of the required frequency of output while connecting single branch road above, in actual conditions, realizes the local oscillation signal of export target frequency when selector switch also can connect a plurality of branch road at the same time.
Certainly, in actual conditions, in order to reduce crystal oscillator electronic devices and components used, can use variable capacitance and variable inductance, by the numerical value of reasonable change variable capacitance and variable inductance, in conjunction with the switching of the connection status of selector switch, can, in the required frequency of output, reduce as far as possible components and parts number in crystal oscillator.
In the embodiment of the present application, when signal transmitting finishes, while so once having communicated by letter, the circuit of crystal oscillator will restore.Please refer to Fig. 3, the embodiment of the present application signal transmitting method also comprises:
S104: after signal to be sent has been launched, the output frequency of crystal oscillator is set to first frequency.
At the output frequency of crystal oscillator, change specifically when being connected respective branches circuit and realized by selector switch, step S104 is specially:
After signal to be sent has been launched, control selector switch and disconnect branch circuit, the fundamental frequency that the output frequency that makes crystal oscillator is crystal oscillator.And then make crystal oscillator Rapid reset, to while once transmitting, can export correct first frequency by the first predetermined relationship based on default upper.
Embodiment 2
Corresponding with the signal transmitting method that embodiment 1 provides, the application provides a kind of transmitter by embodiment 2, please refer to Fig. 4, and this transmitter comprises:
Crystal oscillator 10, for generation of local oscillation signal;
Processor unit 20, for determine the tranmitting frequency of signal to be transmitted according to the ascending resource of network allocation, and the output frequency of crystal oscillator is set to first frequency when tranmitting frequency is less than setting threshold, so that transmitter is launched signal to be sent according to the crystal oscillator after arranging; Wherein, first frequency and the fundamental frequency of crystal oscillator and the emission band at tranmitting frequency place meet the first predetermined relationship with the frequency difference of corresponding frequency acceptance band.
In the embodiment of the present application, due in compared with LF communication (as lower than 1.4GHz), launching opportunity is set the output frequency of crystal oscillator according to default formula, the mixing noise that the local oscillation signal of its output and the leakage of harmonic wave thereof are produced all drops on outside frequency acceptance band, and then in the situation that not using special filter, has eliminated the impact to received signal of mixing noise that local oscillator leakage produces; And then solved the transmitter existing in prior art and must use filter could eliminate or reduce the technical problem that in low-frequency range communication, local oscillator leakage disturbs receiving band signal.
The mode that the concrete output frequency by crystal oscillator changes to first frequency connects different branch circuits for the selector switch by crystal oscillator switches, and to increase extra capacitor and inductor in oscillating circuit, and then exports required frequency.
That is, in the embodiment of the present application, crystal oscillator 10 comprises selector switch and M branch circuit; Wherein, when selector switch connects N branch circuit in M branch circuit, crystal oscillator is exported the local oscillation signal of the frequency corresponding with N branch circuit; Wherein, M is more than or equal to 2 positive integer, and N is the positive integer that is less than or equal to M.
In the embodiment of the present application, when signal transmitting finishes, while so once having communicated by letter, the circuit of crystal oscillator will restore.That is, processor unit 20 is also for after having launched at signal to be sent, and the output frequency of crystal oscillator 10 is set to the fundamental frequency of crystal oscillator.。
Embodiment 3
The application provides a kind of electronic equipment by embodiment 3, and this electronic equipment can be specifically mobile terminal, or base station equipment.This electronic equipment comprises the transmitter relating in embodiment 2.
Various signal processing modes in signal transmitting method in embodiment 1 and instantiation are equally applicable to the transmitter of embodiment 2 and the electronic equipment in embodiment 3, by the detailed description to signal transmitting method in embodiment 1, those skilled in the art can clearly know the implementation method of transmitter and the electronic equipment in embodiment 3 of embodiment 2, so succinct for specification, is not described in detail in this.
The one or more technical schemes that provide in the embodiment of the present application, at least have following technique effect or advantage:
1, due in the embodiment of the present application, in compared with LF communication (as lower than 1.4GHz), launching opportunity is set the output frequency of crystal oscillator according to default formula, the mixing noise that the local oscillation signal of its output and the leakage of harmonic wave thereof are produced all drops on outside frequency acceptance band, and then in the situation that not using special filter, has eliminated the impact to received signal of mixing noise that local oscillator leakage produces; And then solved the transmitter existing in prior art and must use filter could eliminate or reduce the technical problem that in low-frequency range communication, local oscillator leakage disturbs receiving band signal.
2, due in the embodiment of the present application, at the processor of transmitter, determined after the output frequency of crystal oscillator, processor can indicate the selector switch in crystal oscillator to be connected in corresponding circuit branch, to oscillating circuit, increase extra inductance and electric capacity, and then required frequency corresponding to output, whole crystal oscillator output frequency switching mode is quick and cost is very low.
Those skilled in the art should understand, the application's embodiment can be provided as method, system or computer program.Therefore, the application can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect completely.And the application can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The application is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present application, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame on computer or other programmable devices.
Specifically, computer program instructions corresponding to information processing method in the embodiment of the present application can be stored in CD, hard disk, on the storage mediums such as USB flash disk, when the computer program instructions corresponding with information processing method in storage medium read or be performed by an electronic equipment, comprise the steps:
According to the ascending resource of network allocation, determine the tranmitting frequency of signal to be transmitted;
If the described tranmitting frequency of described signal to be transmitted is less than setting threshold, the output frequency of described crystal oscillator is set to first frequency, wherein, described first frequency and the fundamental frequency of described crystal oscillator and the emission band at described tranmitting frequency place meet the first predetermined relationship with the frequency difference of corresponding frequency acceptance band;
According to the described signal to be sent of described crystal oscillator transmitting after arranging.
Optionally, in described storage medium, also store other computer instruction, these computer instructions with step: after being performed according to computer instruction corresponding to the described signal to be sent of described crystal oscillator transmitting after arranging, be performed, when being performed, comprise the steps:
After described signal to be sent has been launched, the output frequency of described crystal oscillator is set to the described fundamental frequency of described crystal oscillator.
Although described the application's preferred embodiment, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the application's scope.
Obviously, those skilled in the art can carry out various changes and modification and the spirit and scope that do not depart from the application to the application.Like this, if within these of the application are revised and modification belongs to the scope of the application's claim and equivalent technologies thereof, the application is also intended to comprise these changes and modification interior.
Claims (8)
1. a signal transmitting method, is applied to transmitter, and described transmitter comprises a crystal oscillator, for generation of local oscillation signal; Described method comprises:
According to the ascending resource of network allocation, determine the tranmitting frequency of signal to be transmitted;
If the described tranmitting frequency of described signal to be transmitted is less than setting threshold, the output frequency of described crystal oscillator is set to first frequency, wherein, described first frequency and the fundamental frequency of described crystal oscillator and the emission band at described tranmitting frequency place meet the first predetermined relationship with the frequency difference of corresponding frequency acceptance band;
According to the described signal to be sent of described crystal oscillator transmitting after arranging.
2. the method for claim 1, is characterized in that:
Described crystal oscillator comprises selector switch and M branch circuit; Wherein, when described selector switch connects N branch circuit in a described M branch circuit, the local oscillation signal of the frequency that described crystal oscillator output is corresponding with a described N branch circuit; Wherein, M is more than or equal to 2 positive integer, and N is the positive integer that is less than or equal to M;
The output frequency of described crystal oscillator is set to first frequency, is specially:
Calculate described first frequency, control described selector switch and connect N the branch circuit corresponding with described first frequency, the output frequency that makes described crystal oscillator is described first frequency.
3. method as claimed in claim 2, is characterized in that, described method also comprises:
After described signal to be sent has been launched, control described selector switch and disconnect described branch circuit, the described fundamental frequency that the output frequency that makes described crystal oscillator is described crystal oscillator.
4. method as claimed in claim 1 or 2, is characterized in that, described method also comprises:
After described signal to be sent has been launched, the output frequency of described crystal oscillator is set to the described fundamental frequency of described crystal oscillator.
5. a transmitter, comprising:
Crystal oscillator, for generation of local oscillation signal;
Processor unit, for determine the tranmitting frequency of signal to be transmitted according to the ascending resource of network allocation, and the output frequency of described crystal oscillator is set to first frequency when described tranmitting frequency is less than setting threshold, so that described transmitter is according to the described signal to be sent of described crystal oscillator transmitting after arranging; Wherein, described first frequency and the fundamental frequency of described crystal oscillator and the emission band at described tranmitting frequency place meet the first predetermined relationship with the frequency difference of corresponding frequency acceptance band.
6. transmitter as claimed in claim 5, is characterized in that, described crystal oscillator comprises selector switch and M branch circuit; Wherein, when described selector switch connects N branch circuit in a described M branch circuit, the local oscillation signal of the frequency that described crystal oscillator output is corresponding with a described N branch circuit; Wherein, M is more than or equal to 2 positive integer, and N is the positive integer that is less than or equal to M.
7. the transmitter as described in claim 5 or 6, is characterized in that, described processor unit is also for after having launched at described signal to be sent, and the output frequency of described crystal oscillator is set to the fundamental frequency of described crystal oscillator.
8. an electronic equipment, is characterized in that, described electronic equipment comprises the transmitter as described in claim 5,6 or 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310717755.9A CN103684484B (en) | 2013-12-23 | 2013-12-23 | A kind of signal transmitting method, a kind of transmitter and a kind of electronic equipment |
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|---|---|---|---|
| CN201310717755.9A CN103684484B (en) | 2013-12-23 | 2013-12-23 | A kind of signal transmitting method, a kind of transmitter and a kind of electronic equipment |
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| CN103684484A true CN103684484A (en) | 2014-03-26 |
| CN103684484B CN103684484B (en) | 2015-08-26 |
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| CN201310717755.9A Active CN103684484B (en) | 2013-12-23 | 2013-12-23 | A kind of signal transmitting method, a kind of transmitter and a kind of electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167396A (en) * | 2020-09-10 | 2022-03-11 | Oppo广东移动通信有限公司 | Control method based on ultra-wideband ranging and related device |
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| US20010014596A1 (en) * | 2000-02-16 | 2001-08-16 | Tetsuya Takaki | Radio set and frequency converting method therefor |
| CN1549622A (en) * | 2003-05-23 | 2004-11-24 | 乐金电子（中国）研究开发中心有限公 | Method and apparatus for carrier deviation estimation in mobile communication system |
| CN101567705A (en) * | 2009-03-31 | 2009-10-28 | 中兴通讯股份有限公司 | Mobile terminal and uplink channel local frequency regulation method |
| CN102006436A (en) * | 2009-09-01 | 2011-04-06 | 夏普株式会社 | Front-end circuit, tuner, and television broadcasting receiver |
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|---|---|---|---|---|
| US20010014596A1 (en) * | 2000-02-16 | 2001-08-16 | Tetsuya Takaki | Radio set and frequency converting method therefor |
| CN1549622A (en) * | 2003-05-23 | 2004-11-24 | 乐金电子（中国）研究开发中心有限公 | Method and apparatus for carrier deviation estimation in mobile communication system |
| CN101567705A (en) * | 2009-03-31 | 2009-10-28 | 中兴通讯股份有限公司 | Mobile terminal and uplink channel local frequency regulation method |
| CN102006436A (en) * | 2009-09-01 | 2011-04-06 | 夏普株式会社 | Front-end circuit, tuner, and television broadcasting receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114167396A (en) * | 2020-09-10 | 2022-03-11 | Oppo广东移动通信有限公司 | Control method based on ultra-wideband ranging and related device |
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| CN103684484B (en) | 2015-08-26 |
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