WO2018082300A1

WO2018082300A1 - Wireless transmitter and control method therefor, and computer storage medium

Info

Publication number: WO2018082300A1
Application number: PCT/CN2017/087084
Authority: WO
Inventors: 叶天翔; 张威龙; 郑哲; 姜学平; 张亚朋; 崔文朋; 陈兆勋
Original assignee: 全球能源互联网研究院有限公司; 国网天津市电力公司; 国家电网公司
Priority date: 2016-11-01
Filing date: 2017-06-02
Publication date: 2018-05-11
Also published as: CN106533460A

Abstract

Provided are a wireless transmitter and a control method therefor, and a computer storage medium. The wireless transmitter comprises a phase lock module and a power amplifier, wherein the phase lock module is configured to perform up-frequency conversion on a baseband signal according to a local oscillation signal; and the power amplifier is configured to amplify the baseband signal which has been subjected to frequency conversion and is output by the phase lock module.

Description

Wireless transmitter and control method thereof, computer storage medium

Cross-reference to related applications

The present application is filed on the basis of the Chinese Patent Application No. PCT Application No.

Technical field

The present invention relates to the field of micro power wireless communication technologies, and in particular, to a wireless transmitter, a control method thereof, and a computer storage medium.

Background technique

Micropower wireless communication is a communication technology widely used in the field of industrial data collection. It has the advantages of strong diffraction ability and long recognition distance. The wireless transmitter currently used for micro power wireless communication is mainly a direct conversion transmitter. FIG. 1 is a schematic diagram of a direct conversion transmitter. As shown, the transmitter includes two multipliers and one adder. The direct conversion transmitter mainly uses a combination of multipliers, adders and filters to directly upconvert the baseband data, but this circuit structure not only increases the hardware cost and design complexity of the transmitter, but also reduces its reliable operation. Sex.

Summary of the invention

In order to overcome the deficiencies of the prior art, embodiments of the present invention are expected to provide a wireless transmitter, a control method thereof, and a computer storage medium, which simplify the structure of the transmitter and reduce the hardware cost.

The technical solution of the embodiment of the present invention is implemented as follows:

In a first aspect, an embodiment of the present invention provides a wireless transmitter, where the wireless transmitter package Including a phase lock module and a power amplifier;

The phase lock module is configured to upconvert the baseband signal according to the local oscillation signal;

The power amplifier is configured to amplify the converted baseband signal output by the phase lock module.

As an embodiment, the phase lock module includes a modulator and a phase locked loop; the modulator, the phase locked loop and the power amplifier are sequentially connected.

As an embodiment, the modulator is a high order sigma delta modulator.

As an implementation manner, the phase locked loop includes a phase detector that is sequentially connected, a loop filter, a voltage controlled oscillator, and a frequency divider;

One input end of the phase detector is connected to the local oscillator and receives a local oscillation signal of the output thereof, and the other input terminal is connected to the output end of the frequency divider;

The other input of the frequency divider is coupled to the modulator;

The other output of the voltage controlled oscillator is coupled to the power amplifier.

As an embodiment, the wireless transmitter further includes a filter;

The input end of the filter is connected to the information source and receives the baseband signal it emits, and the output end is connected to the phase lock module.

As an embodiment, the filter is a Gaussian filter.

As an embodiment, the wireless transmitter further includes an antenna module, and the antenna module is connected to an output end of the power amplifier.

As an embodiment, the frequency of the converted baseband signal is 470 MHz to 510 MHz.

In a second aspect, an embodiment of the present invention provides a method for controlling a wireless transmitter provided by any one of the foregoing technical solutions, where the control method includes:

Upconverting the baseband signal according to the local oscillation signal;

The converted baseband signal is amplified.

As an implementation manner, the upconverting the baseband signal according to the local oscillation signal includes: changing a frequency of the baseband signal by adjusting a frequency division ratio of the frequency divider in the phase lock module.

As an implementation manner, the frequency division of the adjusted frequency divider is as shown in the following formula (1):

N ₂ =N ₁ (1+γ) (1)

Where γ is the adjustment coefficient, -1<γ<1 and γ≠0; N ₁ and N ₂ are the frequency division ratios of the pre-adjustment and the adjusted frequency divider, respectively.

As an implementation manner, the frequency division ratio of the frequency divider is adjusted from (N ₁ -N _o ) to (N ₁ +N _o ); wherein N ₁ is a frequency division ratio of the frequency divider before adjustment. N _o is the order of the modulators in the phase-locked module.

In a third aspect, an embodiment of the present invention provides a computer storage medium, wherein the computer storage medium stores computer executable instructions for performing the wireless described in the embodiments described above. The control method of the transmitter.

Compared with the prior art, the technical solutions of the embodiments of the present invention have the following beneficial effects:

A wireless transmitter provided by an embodiment of the present invention uses a phase lock module to perform frequency conversion on a baseband signal, thereby omitting a device such as a multiplier and an adder in the prior art, which simplifies the structure of the transmitter and reduces the hardware cost;

The wireless transmitter control method and the computer storage medium provided by the embodiment of the invention can change the frequency of the baseband signal by adjusting the frequency division ratio of the frequency divider in the phase lock module, and the operation is simple.

DRAWINGS

1 is a schematic structural view of a direct conversion transmitter;

2 is a schematic structural diagram of a basic structure of a wireless transmitter according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a wireless transmitter according to an embodiment of the present invention.

detailed description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the following will be combined BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention are clearly and completely described in the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

A wireless transmitter according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

2 is a schematic structural diagram of a basic structure of a wireless transmitter according to an embodiment of the present invention. As shown in FIG. 2, the wireless transmitter in this embodiment includes a phase lock module and a power amplifier. among them,

The phase lock module is configured to upconvert the baseband signal according to the local oscillation signal.

The power amplifier is configured to amplify the converted baseband signal output from the phase locked module.

In this embodiment, the phase-locked module is used to frequency-convert the baseband signal, and the multiplier and adder in the prior art are omitted, which simplifies the transmitter structure and reduces the hardware cost.

As shown in FIG. 3, the phase locking module in this embodiment may include the following structure.

In this embodiment, the phase lock module includes a modulator and a phase locked loop, and the modulator, the phase locked loop and the power amplifier are sequentially connected. among them,

1, modulator

In this embodiment, the modulator can provide an enable signal for selecting a frequency division ratio to the phase locked loop, that is, the output signal of the modulator is a time-varying signal, and the phase-locked loop can output the corresponding time-varying signal according to the time-varying signal. Dividing ratio. Among them, the modulator can use a high-order Sigma Delta modulator.

2, phase-locked loop

As shown in FIG. 3, the phase locked loop includes a phase detector that is connected in series, a loop filter, a voltage controlled oscillator, and a frequency divider. One input of the phase detector is connected to the local oscillator and receives the local oscillator signal of its output, and the other input is connected to the output of the frequency divider. among them,

The other input of the frequency divider is coupled to the modulator and receives an enable signal for the division ratio of the modulator output.

The other output of the voltage controlled oscillator is connected to a power amplifier, and the converted baseband signal Send to the power amplifier for amplification.

As an implementation manner, the wireless transmitter in this embodiment may further include the following structure.

The wireless transmitter in this embodiment further includes a filter and an antenna module. among them,

1, the filter

In this embodiment, the input end of the filter is connected to the information source and receives the baseband signal emitted by the filter, and the output end is connected to the phase lock module. In the embodiment, the filter can adopt a Gaussian filter, and the filter filters the baseband signal so that the pulse envelope of the baseband signal has neither a steep edge nor an inflection point, so the spectral characteristics of the baseband signal are better, and thus the required bandwidth is better. Narrow, increasing bandwidth utilization.

2, the antenna module

In this embodiment, the antenna module is connected to the output end of the power amplifier, and the baseband signal amplified by the power amplifier can be transmitted to each device to be received through the wireless communication network. The frequency of the baseband signal output by the wireless transmitter is 470 MHz to 510 MHz.

The present invention also provides a method of controlling a wireless transmitter and provides a specific embodiment.

A method for controlling a wireless transmitter according to an embodiment of the present invention includes: up-converting a baseband signal according to a local oscillation signal; and amplifying the converted baseband signal.

The step of upconverting the baseband signal according to the local oscillation signal includes:

The frequency of the baseband signal is changed by adjusting a frequency division ratio of the frequency divider in the phase locked module.

In this embodiment, the frequency ω _{d of the} baseband signal is much smaller than the frequency ω _{c of the} local oscillating signal, and the baseband signal is up-converted, that is, the frequency ω _d is increased to ω _d + ω _c . Where ω _d +ω _c can be expressed as

In this embodiment, the frequency of the baseband signal is changed by adjusting the frequency division ratio of the frequency divider in the phase lock module, and the adjusted frequency divider is as shown in the following formula (1):

N ₂ =N ₁ (1+γ) (1)

Where γ is the adjustment coefficient, -1<γ<1 and γ≠0; N ₁ and N ₂ are the frequency division ratios of the pre-adjustment and post-adjustment frequency divider, respectively. The frequency divider ratio of the frequency divider is adjusted from (N ₁ -N _o ) to (N ₁ +N _o ), and N _o is the order of the modulator in the phase-locked module.

Assuming that the frequency of the local oscillating signal before and after the frequency divider adjustment of the phase-locked module is F _b and F _{out respectively} , then the frequency of the output signal of the post-divider, that is, the local oscillating signal, is adjusted according to formula (1) as follows (2) ) shown:

F _out =F _b ×N ₁ (1+γ) (2)

As known before:

ω _c =F _b ×N ₁ (3)

Substituting equation (3) into equation (2) yields:

F _out =ω _c +F _b ×N ₁ ×γ (4)

The adjustment coefficient γ is a variable, so in this embodiment it can be set to:

Substituting equation (5) into equation (4) yields:

F _out =ω _c +ω _d (6)

Through the above process, it can be determined that the frequency of the baseband signal can be changed after adjusting the frequency division ratio of the frequency divider in the phase-locked module, that is, it can be up-converted.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the wireless transmitter control method described in the foregoing embodiments.

Embodiments of the present invention also describe a computer storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the following steps:

Upconverting the baseband signal according to the local oscillation signal;

Amplifying the converted baseband signal;

Wherein, the baseband signal is upconverted according to the local oscillation signal, including:

The frequency of the baseband signal is changed by adjusting the frequency division ratio of the frequency divider in the phase-locked module. The adjusted frequency divider is as shown in equation (1):

N ₂ =N ₁ (1+γ) (1)

Where γ is the adjustment coefficient, -1<γ<1 and γ≠0; N ₁ and N ₂ are the frequency division ratios of the pre-adjustment and the adjusted frequency divider, respectively. The frequency divider ratio of the frequency divider is adjusted from (N ₁ -N _o ) to (N ₁ +N _o ), and N _o is the order of the modulator in the phase-locked module.

Those skilled in the art should understand that the functions of the programs in the computer storage medium of the present embodiment can be understood by referring to the related description of the wireless transmitter control described in the embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.

The units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; The unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

One of ordinary skill in the art can understand that all or part of the steps of the above method embodiments are implemented. The foregoing may be completed by a program instruction related hardware, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiment; and the foregoing storage medium includes: mobile storage A device that can store program code, such as a device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

Alternatively, the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a ROM, a RAM, a magnetic disk, or an optical disk.

The foregoing description of the specific exemplary embodiments of the present invention has The description is not intended to limit the invention to the precise forms disclosed. The embodiments were chosen and described in order to explain the particular embodiments of the invention Choose and change. The scope of the invention is intended to be defined by the claims and their equivalents.

The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Industrial applicability

The wireless transmitter according to the embodiment of the present invention includes a phase lock module and a power amplifier; the phase lock module is configured to upconvert the baseband signal according to the local oscillation signal; and the power amplifier is configured to convert the baseband of the frequency conversion module to the output of the phase lock module. The signal is amplified; thus, the baseband signal is frequency-converted by the phase-locked module, eliminating the need for multipliers and adders in the prior art, simplifying the transmitter structure and reducing hardware costs.

Claims

A wireless transmitter comprising a phase lock module and a power amplifier;

The phase lock module is configured to upconvert the baseband signal according to the local oscillation signal;

The power amplifier is configured to amplify the converted baseband signal output by the phase lock module.
A wireless transmitter according to claim 1, wherein said phase lock module comprises a modulator and a phase locked loop; said modulator, said phase locked loop and said power amplifier are connected in sequence.
A wireless transmitter according to claim 2, wherein

The modulator is a high order sigma delta modulator.
A wireless transmitter according to claim 2, wherein said phase locked loop comprises a phase-connected phase detector, a loop filter, a voltage controlled oscillator and a frequency divider;

One input end of the phase detector is connected to the local oscillator and receives a local oscillation signal of the output thereof, and the other input terminal is connected to the output end of the frequency divider;

The other input of the frequency divider is coupled to the modulator;

The other output of the voltage controlled oscillator is coupled to the power amplifier.
A wireless transmitter according to claim 1, wherein

The wireless transmitter also includes a filter;

The input end of the filter is connected to the information source and receives the baseband signal it emits, and the output end is connected to the phase lock module.
A wireless transmitter according to claim 1, wherein

The filter is a Gaussian filter.
A wireless transmitter according to claim 1, wherein

The wireless transmitter also includes an antenna module coupled to an output of the power amplifier.
A wireless transmitter according to claim 1, wherein

The frequency of the converted baseband signal is 470 MHz to 510 MHz.
A control method for a wireless transmitter according to any one of claims 1-8, wherein the control method comprises:

Upconverting the baseband signal according to the local oscillation signal;

Amplify the converted baseband signal.
The control method of a wireless transmitter according to claim 9, wherein the up-converting the baseband signal according to the local oscillation signal comprises:

The frequency of the baseband signal is changed by adjusting a frequency division ratio of the frequency divider in the phase locked module.
A method of controlling a wireless transmitter according to claim 10, wherein

The frequency divider of the adjusted divider is as shown in equation (1):

N 2 =N 1 (1+γ) (1)

Where γ is the adjustment coefficient, -1<γ<1 and γ≠0; N 1 and N 2 are the frequency division ratios of the pre-adjustment and the adjusted frequency divider, respectively.
A method of controlling a wireless transmitter according to claim 10, wherein

The frequency division ratio of the frequency divider is adjusted to be (N 1 -N o ) to (N 1 +N o );

Where N 1 is the frequency divider division ratio before adjustment, and N o is the order of the modulator in the phase locked module.
A computer storage medium having stored therein computer executable instructions for performing the method of any one of claims 9 to 12.