CN108683621B

CN108683621B - Doppler frequency shift correction method and device

Info

Publication number: CN108683621B
Application number: CN201810272427.5A
Authority: CN
Inventors: 张彤
Original assignee: Xi'an Fengyu Information Technology Co ltd
Current assignee: Xi'an Fengyu Information Technology Co ltd
Priority date: 2018-03-29
Filing date: 2018-03-29
Publication date: 2021-07-30
Anticipated expiration: 2038-03-29
Also published as: CN108683621A

Abstract

The disclosure relates to a method and an apparatus for correcting a doppler shift. The method comprises the following steps: acquiring a current first movement speed and a current first position of the sending terminal; generating reference information according to the first movement speed, the first position and effective information to be sent; and sending the reference information to a receiving terminal so that the receiving terminal can perform Doppler frequency shift correction according to the first motion speed and the first position when demodulating the effective information. In the technical scheme, the sending terminal can send the current first position and the current first movement speed to the receiving terminal, so that the receiving terminal can conveniently carry out Doppler frequency shift correction according to the first movement speed and the first position when demodulating the effective information, the effective information demodulation effect is improved, and the accuracy of obtaining the effective information is further improved.

Description

Doppler frequency shift correction method and device

Technical Field

The present disclosure relates to the field of signal processing technologies, and in particular, to a doppler shift correction method and apparatus.

Background

When wireless communication is performed between two terminals having relative motion, doppler shift occurs in a communication signal transmitted between the two terminals due to the influence of the relative motion.

Specifically, if two terminals are close to each other, the communication signal received by the receiving terminal will have a shorter wavelength and an increased frequency due to the influence of the doppler effect; if the two terminals are far away from each other, the communication signal received by the receiving terminal may have a longer wavelength and a lower frequency due to the influence of the doppler effect. Both of these cases lead to poor communication, and therefore the doppler shift needs to be corrected when communication is performed.

Disclosure of Invention

In order to overcome the problem of doppler shift in the related art, embodiments of the present disclosure provide a doppler shift correction method and apparatus. The technical scheme is as follows:

according to a first aspect of the embodiments of the present disclosure, there is provided a doppler shift correction method applied to a transmitting terminal, including:

acquiring a current first movement speed and a current first position of the sending terminal;

generating reference information according to the first movement speed, the first position and effective information to be sent;

and sending the reference information to a receiving terminal so that the receiving terminal can perform Doppler frequency shift correction according to the first motion speed and the first position when demodulating the effective information.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the sending terminal can send the current first position and the current first movement speed to the receiving terminal, so that the receiving terminal can conveniently carry out Doppler frequency shift correction according to the first movement speed and the first position when demodulating the effective information, the effective information demodulation effect is improved, and the accuracy of obtaining the effective information is improved.

In one embodiment, the generating reference information according to the first movement speed, the first position and valid information to be transmitted includes:

and when the first movement speed is greater than or equal to a first speed threshold value, generating reference information according to the first movement speed, the first position and effective information to be sent.

In one embodiment, the method further comprises:

and acquiring the first speed threshold corresponding to the reference frequency according to the currently working reference frequency.

According to a second aspect of the embodiments of the present disclosure, there is provided a doppler shift correction method applied to a receiving terminal, including:

receiving reference information sent by a sending terminal, wherein the reference information comprises effective information, a current first movement speed of the sending terminal and a current first position of the sending terminal;

and when the effective information is demodulated, performing Doppler frequency shift correction according to the first motion speed and the first position.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: when the receiving terminal demodulates the effective information, the Doppler frequency shift correction can be carried out according to the first position of the sending terminal and the first movement speed of the current movement of the sending terminal, so that the effective information demodulation effect is improved, and the accuracy rate of obtaining the effective information is further improved.

In one embodiment, the performing doppler shift correction according to the first motion velocity and the first position when demodulating the effective information includes:

acquiring a first Doppler frequency shift of the reference information according to the first movement speed;

determining a position relation change trend with the sending terminal according to the first position;

and when the effective information is demodulated, correcting by adopting the first Doppler frequency shift according to the position relation change trend.

In one embodiment, the obtaining a first doppler shift of the reference information according to the first motion velocity includes:

acquiring a current second movement speed of the receiving terminal;

and when the second movement speed is smaller than a second speed threshold value, acquiring a first Doppler frequency shift of the reference information according to the first movement speed.

and when the first movement speed is greater than or equal to a third speed threshold, acquiring a first Doppler frequency shift of the reference information according to the first movement speed.

In one embodiment, the performing, when demodulating the effective information, correction using the first doppler shift according to the position relation variation tendency includes:

and if the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, the first Doppler frequency shift negative value is adopted for correction when the effective information is demodulated.

and if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, the first Doppler frequency shift positive value is adopted for correction when the effective information is demodulated.

acquiring a current second movement speed of the receiving terminal;

when the second movement speed is greater than or equal to the second speed threshold, determining a position relation change trend with the sending terminal according to the first position;

and when the effective information is demodulated, performing Doppler frequency shift correction according to the position relation change trend, the second movement speed and the first movement speed.

In one embodiment, the performing doppler shift correction according to the position relation change trend, the second moving speed, and the first moving speed when demodulating the effective information includes:

if the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, acquiring a second Doppler frequency shift of the reference information according to the sum of the second movement speed and the first movement speed;

and when the effective information is demodulated, correcting by adopting the second Doppler frequency shift negative value.

if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, obtaining a third Doppler frequency shift of the reference information according to the difference value of the second movement speed and the first movement speed;

and when the effective information is demodulated, correcting by adopting the third Doppler frequency shift positive value.

According to a third aspect of the embodiments of the present disclosure, there is provided a doppler shift correction device including:

the first acquisition module is used for acquiring the current first movement speed and the current first position of the sending terminal;

the generating module is used for generating reference information according to the first movement speed, the first position and effective information to be sent;

and the sending module is used for sending the reference information to a receiving terminal so that the receiving terminal can carry out Doppler frequency shift correction according to the first movement speed and the first position when demodulating the effective information.

In one embodiment, the generating module comprises:

and the generation submodule is used for generating reference information according to the first movement speed, the first position and effective information to be sent when the first movement speed is greater than or equal to a first speed threshold value.

In one embodiment, the apparatus further comprises:

and the second acquisition module is used for acquiring the first speed threshold corresponding to the reference frequency according to the currently working reference frequency.

According to a fourth aspect of the embodiments of the present disclosure, there is provided a doppler shift correction device including:

the receiving module is used for receiving reference information sent by a sending terminal, wherein the reference information comprises effective information, a current first movement speed of the sending terminal and a current first position of the sending terminal;

and the correction module is used for performing Doppler frequency shift correction according to the first movement speed and the first position when the effective information is demodulated.

In one embodiment, the correction module comprises:

the first obtaining submodule is used for obtaining a first Doppler frequency shift of the reference information according to the first movement speed;

the first determining module is used for determining the position relation change trend with the sending terminal according to the first position;

and the first correction submodule is used for correcting by adopting the first Doppler frequency shift according to the position relation change trend when the effective information is demodulated.

In one embodiment, the first obtaining sub-module includes:

the first acquisition unit is used for acquiring the current second movement speed of the receiving terminal;

and the second obtaining unit is used for obtaining a first Doppler frequency shift of the reference information according to the first movement speed when the second movement speed is smaller than a second speed threshold value.

In one embodiment, the first obtaining sub-module includes:

and the third obtaining unit is used for obtaining the first Doppler frequency shift of the reference information according to the first movement speed when the first movement speed is greater than or equal to a third speed threshold value.

In one embodiment, the first correction submodule includes:

and the first correction unit is used for adopting the first Doppler frequency shift negative value to correct when the effective information is demodulated if the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend.

In one embodiment, the first correction submodule includes:

and the second correction unit is used for adopting the first Doppler frequency shift to correct when the effective information is demodulated if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend.

In one embodiment, the correction module comprises:

the second obtaining submodule is used for obtaining the current second movement speed of the receiving terminal;

a second determining module, configured to determine a position relationship change trend with the sending terminal according to the first position when the second moving speed is greater than or equal to the second speed threshold;

and the second correction submodule is used for performing Doppler frequency shift correction according to the position relation change trend, the second movement speed and the first movement speed when the effective information is demodulated.

In one embodiment, the second syndrome module includes:

a fourth obtaining unit, configured to obtain, if it is determined that the receiving terminal and the sending terminal are close to each other according to the position relationship variation trend, a second doppler frequency shift of the reference information according to a sum of the second movement speed and the first movement speed;

and the second correction unit is used for correcting by adopting the second Doppler frequency shift to take a negative value when the effective information is demodulated.

In one embodiment, the second syndrome module includes:

a fifth obtaining unit, configured to obtain a third doppler frequency shift of the reference information according to a difference between the second motion speed and the first motion speed if it is determined that the receiving terminal and the sending terminal are far away from each other according to the position relationship variation trend;

and the third correction unit is used for correcting by adopting the third Doppler frequency shift positive value when the effective information is demodulated.

According to a fifth aspect of the embodiments of the present disclosure, there is provided a doppler shift correction device including:

a first processor;

a first memory for storing first processor-executable instructions;

wherein the first processor is configured to:

According to a sixth aspect of the embodiments of the present disclosure, there is provided a doppler shift correction device including:

a second processor;

a second memory for storing second processor-executable instructions;

wherein the second processor is configured to:

According to a seventh aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer instructions, wherein the instructions, when executed by a processor, implement the steps of the method according to any one of the embodiments of the first aspect.

According to an eighth aspect of the embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method according to any one of the embodiments of the second aspect.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1a is a flow chart illustrating a doppler shift correction method according to an exemplary embodiment.

Fig. 1b is a schematic diagram illustrating a structure of a transmitting terminal according to an exemplary embodiment.

Fig. 2a is a flow chart illustrating a doppler shift correction method according to an exemplary embodiment.

Fig. 2b is a schematic diagram illustrating the structure of a transmitting terminal according to an exemplary embodiment.

Fig. 2c is a flow chart illustrating a doppler shift correction method according to an example embodiment.

Fig. 3 is an interaction diagram illustrating a doppler shift correction method according to an exemplary embodiment.

Fig. 4a is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 4b is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 4c is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5a is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5b is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5c is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5d is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5e is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5f is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5g is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5h is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 5i is a schematic structural diagram illustrating a doppler shift correction apparatus according to an exemplary embodiment.

Fig. 6 is a block diagram illustrating a structure of a doppler shift correction apparatus according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The technical scheme provided by the embodiment of the disclosure relates to a sending terminal and a receiving terminal, wherein the sending terminal and the receiving terminal can be devices capable of sending information to each other, such as an interphone or a mobile phone. In the related art, if there is relative motion between the transmitting terminal and the receiving terminal during the process of transmitting information from the transmitting terminal to the receiving terminal, doppler shift may occur in the information received by the receiving terminal. If the receiving terminal demodulates the information according to the preset reference frequency without doppler shift, the situation of poor information demodulation effect may occur, resulting in low information acquisition accuracy. According to the technical scheme provided by the embodiment of the disclosure, the sending terminal can send the current first position and the current first movement speed to the receiving terminal, and the receiving terminal can perform Doppler frequency shift correction according to the first movement speed and the first position when demodulating effective information, so that the effective information demodulation effect is improved, and the accuracy of obtaining the effective information is further improved.

The disclosed embodiment provides a Doppler frequency shift correction method, and an execution main body implementing the method comprises a transmitting terminal and a receiving terminal. According to different implementation main bodies of the method, the embodiment of the disclosure arranges two sets of embodiments as follows:

transmitting terminal side

Fig. 1a is a flowchart illustrating a doppler shift correction method applied to a transmitting terminal according to an exemplary embodiment, where as shown in fig. 1a, the doppler shift correction method includes the following steps 101 to 103:

in step 101, a current first movement speed and a first position of a transmitting terminal are obtained.

As shown in fig. 1b, the transmitting terminal 10 is provided with a speed sensor 10a, a GPS (Global Positioning System) module 10b and a transportation control module 10c, wherein the speed sensor 10a and the GPS module 10b are connected to the operation control module 10 c. If it is determined that voice information needs to be sent to the receiving terminal, the voice information is valid information to be sent, the operation control module 10c may instruct the speed sensor 10a to start and detect the current moving speed and record the current moving speed as a first moving speed, and then instruct the GPS module 10b to start and detect the current position and record the current position as a first position.

Or the operation control module 10c may further instruct the GPS module 10b to continuously acquire the positions of the transmitting terminal at two times according to a preset time interval, then calculate the distance between the two acquired positions, and calculate the current movement speed of the transmitting terminal according to the distance and the preset time interval. If the difference between the calculated motion speed and the motion speed detected by the speed sensor 10b is less than or equal to a first preset threshold, the motion speed detected by the speed sensor 10b may be recorded as a first motion speed; if the difference between the calculated movement speed and the movement speed detected by the speed sensor 10b is greater than the first preset threshold, the operation control module 10c instructs the speed sensor 10b to detect the current movement speed again, and compares the current movement speed with the calculated movement speed again, so that the accuracy of acquiring the first movement speed is improved.

In step 102, reference information is generated according to the first movement speed, the first position and the effective information to be transmitted.

For example, the sending terminal may add the first movement speed and the first position to a header of the voice message to be sent, where the sync Bit information occupies 10 bits of bytes, the first position occupies 8 bits of bytes, and the first movement speed occupies 2 bits of bytes. And then the transmitting terminal modulates the voice information with the first movement speed and the first position added in the information head onto a carrier wave of a reference frequency to generate reference information.

In step 103, the reference information is transmitted to the receiving terminal, so that the receiving terminal performs doppler shift correction according to the first motion speed and the first position when demodulating the effective information.

For example, the transmitting terminal may transmit the reference information in an AFSK (Audio Frequency Shift Keying) manner. As can be seen from the calculation of the AFSK transmission rate of 1200bps, the transmission time of the header to which the first position and the first movement velocity are added takes about 133ms, and the user using the receiving terminal hardly perceives the 133ms delay when listening to the speech information included in the reference information.

Optionally, referring to fig. 1b, the transmitting terminal 10 is further provided with a DAC module 10d, a radio frequency transceiver module 10e, a power amplification module 10f, and a transmitting antenna 10 g. The DAC module 10d and the rf transceiver module 10e are both connected to the transport control module 10c, the power amplification module 10f is connected to the rf transceiver module 10e, and the transmitting antenna 10g is connected to the power amplification module 10 f. The DAC module 10d may output an analog voltage signal to the rf transceiver module 10e according to the voltage output by the conveyance control module 10c, and the rf transceiver module 10e may adjust a reference frequency of the sending terminal according to the analog voltage signal, that is, adjust a carrier frequency of the sending terminal to the reference frequency, and then modulate the voice information with the first moving speed and the first position added to the header onto the carrier to form the reference information. The power amplifying module 10f may perform power amplification on the reference information and then output the reference information to the transmitting antenna 10g, so that the transmitting antenna 10g can transmit the reference information.

Optionally, the receiving terminal allows an error in a certain range for each reference frequency, and if the doppler shift is within the error range, the demodulation of valid information is not affected. If the first moving speed is greater than or equal to the first speed threshold, that is, when the current moving speed of the sending terminal is greater and the generated doppler shift is also greater, the sending terminal may obtain the first moving speed and the first position, and generate reference information according to the first moving speed, the first position, and valid information to be sent, so that the receiving terminal performs doppler shift correction according to the first moving speed and the first position when demodulating the valid information; if the first moving speed is less than the first speed threshold, that is, if the current moving speed of the sending terminal is small and the possible doppler shift is small, the sending terminal can directly send effective information to the receiving terminal, and the receiving terminal does not need to correct the doppler shift.

In practical applications, the first speed threshold may be set by the sending terminal according to a user instruction, or may be calculated by the sending terminal according to an error range. The specific transmitting terminal can calculate the first velocity threshold v according to the error range w and formula 1_yIn practical applications, the transmitting terminal can also be used as a receiving terminal, so that the error range allowed by the receiving terminal is the error range allowed by the transmitting terminal. The equation 1 is: v. of_y＝f*λ_cWherein λ is_cIs the speed of light. Taking the reference frequency as 400MHz (megahertz) as an example, the allowable error range w of the transmitting terminal is ± 6Hz (hertz), and the first speed threshold corresponding to the reference frequency of 400MHz can be calculated as 16.2km/h (kilometer per hour) according to the formula 1.

According to the technical scheme provided by the embodiment of the disclosure, the sending terminal can send the current first position and the current first movement speed to the receiving terminal, so that the receiving terminal can conveniently perform Doppler frequency shift correction according to the first movement speed and the first position when demodulating effective information, the effective information demodulation effect is improved, and the accuracy of obtaining the effective information is further improved.

Receiving terminal side

Fig. 2a is a flowchart illustrating a doppler shift correction method applied to a receiving terminal according to an exemplary embodiment, and as shown in fig. 2a, the doppler shift correction method includes the following steps 201 to 202:

in step 201, reference information sent by a sending terminal is received, where the reference information includes valid information, a current first movement speed of the sending terminal, and a current first position of the sending terminal.

For example, the receiving terminal may monitor a frequency band in which the reference frequency is located, and then receive reference information sent by the sending terminal using a carrier of the reference frequency, where the reference information includes voice information, and a current first motion speed and a current first position of the sending terminal are added to an information header of the voice information.

In step 202, when the effective information is demodulated, doppler shift correction is performed according to the first moving speed and the first position.

For example, when the receiving terminal demodulates the valid information included in the reference information, it needs to adjust a demodulated reference frequency to a frequency where the reference information is located, where the reference frequency is a local oscillation frequency of the receiving terminal. Since the receiving terminal may have a doppler shift when receiving the reference information, the receiving terminal does not receive the reference information on the reference frequency, but receives the reference information on the reference frequency after the doppler shift is added or subtracted from the reference frequency, so that the receiving terminal needs to adjust the demodulated reference frequency to the reference frequency when demodulating the valid information, which is a process of correcting the doppler shift.

Assuming that the receiving terminal is currently in a stationary state, the receiving terminal may first receive the reference information and then may first move the reference information according to the first movement velocity v₁And equation 2 calculating a first Doppler shift f of the reference information_1m. The equation 2 is: f. of_m＝v/λ_cWherein f is_mIs f_1mV is v₁，λ_cIs the speed of light. When the transmitting terminal is close to the receiving terminal, the reference frequency is larger than the reference frequency due to the Doppler frequency shift generated when the receiving terminal receives the reference information, and when the transmitting terminal is far away from the receiving terminal, the reference frequency is smaller than the reference frequency due to the Doppler frequency shift generated when the receiving terminal receives the reference information, so that when the receiving terminal performs Doppler correction, the change trend of the position relationship between the transmitting terminal and the receiving terminal needs to be determined, and then when effective information is demodulated, the first Doppler frequency shift is adopted for correction according to the change trend of the position relationship. Specifically, the receiving terminal may determine a change trend of the position relationship with the sending terminal according to the first position of the sending terminal, for example, the receiving terminal may collect the current position after receiving the reference information, determine the distance between the receiving terminal and the sending terminal according to the collected position and the first position of the sending terminal, collect the current position again after a preset time interval, and collect the current position againAnd determining the distance between the transmitting terminal and the receiving terminal according to the acquired position and the first position of the transmitting terminal. If the distance obtained by the second calculation is larger than or equal to the distance obtained by the first calculation, the position change trend between the sending terminal and the receiving terminal is far away from each other; if the distance obtained by the second calculation is smaller than the distance obtained by the first calculation, the position change trend between the sending terminal and the receiving terminal is close to each other. If the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, a first Doppler frequency shift negative value is adopted for correction when effective information is demodulated; and if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, correcting by adopting a first Doppler frequency shift positive value when effective information is demodulated.

Specifically, as shown in fig. 2b, the receiving terminal 20 may include an operation control module 20a, a first DAC (Digital to analog converter) module 20b connected to the operation control module 20a, a radio frequency transceiver module 20c, a power amplification module 20d, and a receiving antenna 20e, where the first DAC module 20b is connected to the radio frequency transceiver module 20c through a voltage controlled oscillator 20f, and the radio frequency transceiver module 20c is configured to demodulate effective information included in reference information received by the receiving antenna 20e and subjected to power amplification by the power amplification module 20 d. The operation control module 20a stores a corresponding relationship between frequency shift and voltage, that is, different frequency shifts correspond to different voltages output from the operation control module 20a to the first DAC module 20b, the first DAC module 20b may output different analog voltage signals to the voltage controlled oscillator 20f according to different voltages, the voltage controlled oscillator 20f may output different frequencies according to different analog voltage signals output from the first DAC module 20b, and the frequency is input to the radio frequency transceiver module 20c, so that the local oscillation frequency of the radio frequency transceiver module 20c can be adjusted, that is, the reference frequency of the valid information is demodulated, so that the reference frequency of the valid information demodulated by the radio frequency transceiver module 20c is the same as the reference frequency of the received reference information.

For example, after receiving the reference information, the calculation control module 20a first calculates a first doppler shift according to a first movement velocity of the transmitting terminal included in the reference information, the first doppler shift being a positive number, then determines a position change trend between the transmitting terminal and the receiving terminal according to a first position of the transmitting terminal included in the reference information, and if it is determined that the receiving terminal and the transmitting terminal are close to each other according to the position change trend, the calculation control module 20a takes a negative value of the first doppler shift, then queries a corresponding relationship between the frequency shift and a voltage, determines a first voltage corresponding to the negative value of the first doppler shift, and then outputs the first voltage to the first DAC module 20b, the first DAC module 20b outputs a first analog voltage signal to the voltage-controlled oscillator 20f according to the first voltage, the voltage-controlled oscillator 20f outputs a first frequency according to the first analog voltage signal, the rf transceiver module 20c may adjust the reference frequency to be the same as the reference frequency for receiving the reference information according to the first frequency output by the vco 20 f. The same procedure when the receiving terminal and the transmitting terminal are distant from each other is similar, and the operation can be performed with reference to the above procedure. Since the receiving terminal 20 can also be used as a transmitting terminal in practical applications, the receiving terminal can further include a second DAC module 20i, and the second DAC module 20i is used for adjusting the frequency of the carrier when the receiving terminal 20 transmits information.

The above embodiments all assume that the receiving terminal is in a stationary state, and in practical applications, a situation that the receiving terminal is also moving may occur, and if the moving speed of the receiving terminal is low, the doppler shift generated by the movement of the receiving terminal is low and is within an error range allowed by the receiving terminal, and at this time, the movement of the receiving terminal may be ignored; if the moving speed of the receiving terminal is high, the doppler shift generated by the movement of the receiving terminal is high, and therefore the movement of the receiving terminal needs to be considered when performing the doppler shift correction. For distinguishing, the receiving terminal may further set a second speed threshold, and when receiving the reference information, obtain the current movement speed thereof as a second movement speed, and then determine whether the second movement speed is less than the second speed threshold. When the second movement speed is smaller than the second speed threshold, the movement speed of the receiving terminal is smaller, the Doppler frequency shift generated by the movement of the receiving terminal can be ignored, and the first Doppler frequency shift of the reference information is directly calculated according to the first movement speed of the sending terminal; when the second movement speed is greater than or equal to the second speed threshold, the first doppler frequency shift of the reference information needs to be calculated according to the first movement speed of the launching terminal and the second movement speed of the receiving terminal. The second speed threshold may be set by the receiving terminal according to the user instruction, or may be calculated according to an error range allowed by the reference frequency, and the calculation process is the same as the process of calculating the first speed threshold by the transmitting terminal, and may be implemented with reference to the foregoing embodiment.

Optionally, referring to fig. 2b, the receiving terminal may further include a GPS module 20g and a speed sensor 20h, and when the second movement speed is obtained, the operation control module 20a may instruct the speed sensor 20h to obtain the speed of the current receiving terminal as the second movement speed. Or the operation control module 20a may further instruct the GPS module 20g to continuously acquire the positions of the transmitting terminal twice at preset time intervals, then calculate the distance between the two acquired positions, and calculate the current movement speed of the transmitting terminal according to the distance and the preset time intervals. If the calculated difference between the movement speed and the movement speed detected by the speed sensor 20h is less than or equal to a second preset threshold, the movement speed detected by the speed sensor 20h can be recorded as a second movement speed; if the difference between the calculated moving speed and the moving speed detected by the speed sensor 20h is greater than the second preset threshold, the operation control module 20a instructs the speed sensor 20h to detect the current moving speed again, and compares the current moving speed with the calculated moving speed again, so that the accuracy of obtaining the second moving speed is improved.

In practical application, the sending terminal may further obtain the current first movement speed and the current first position each time the valid information is sent, and then send the reference sending message including the first movement speed, the first position and the valid information to the receiving terminal. The receiving terminal may determine whether doppler shift correction is required according to the magnitude of the first moving speed after receiving the reference transmission message. Specifically, the receiving terminal may set a third speed threshold, and the third speed threshold may be the same as or different from the first speed threshold. If the first movement speed is greater than or equal to the third speed threshold, it indicates that the current movement speed of the sending terminal is greater, and the generated doppler shift is also greater, so that the receiving terminal needs to calculate the first doppler shift of the reference information according to the first movement speed, then determine a position change trend between the receiving terminal and the sending terminal according to the first position, and further perform doppler shift correction according to the position change trend and the first doppler shift; if the first moving speed is less than the third speed threshold, it indicates that the current moving speed of the sending terminal is small, the generated doppler shift is also small, and the receiving terminal can directly use the reference frequency to demodulate the effective information included in the reference information.

In the technical scheme provided by the embodiment of the disclosure, when the receiving terminal demodulates the effective information, the doppler shift correction can be performed according to the first position of the sending terminal and the first movement speed of the current movement of the sending terminal, so that the effect of demodulating the effective information is improved, and the accuracy of obtaining the effective information is further improved.

In one embodiment, as shown in fig. 2c, in step 202, when demodulating the valid information, performing doppler shift correction according to the first motion speed and the first position, may be implemented by steps 2021 to 2023:

in step 2021, a current second movement speed of the receiving terminal is acquired.

In step 2022, when the second moving speed is greater than or equal to the second speed threshold, a trend of change of the positional relationship with the transmitting terminal is determined according to the first position.

In step 2023, when the effective information is demodulated, the doppler shift correction is performed based on the positional relationship variation tendency, the second movement velocity, and the first movement velocity.

For example, the receiving terminal may obtain its current moving speed as a second moving speed when receiving the reference information, and then determine whether the second moving speed is greater than or equal to a second speed threshold. If the second movement speed is greater than or equal to the second speed threshold, it means that the movement speed of the receiving terminal is high, and when performing doppler shift correction, it is necessary to correct the doppler shift generated by both the second movement speed of the receiving terminal and the first movement speed of the transmitting terminal. When the transmitting terminal is close to the receiving terminal, the reference frequency is greater than the reference frequency due to the doppler shift generated when the receiving terminal receives the reference information, and when the transmitting terminal is far from the receiving terminal, the reference frequency is less than the reference frequency due to the doppler shift generated when the receiving terminal receives the reference information.

Specifically, when the second movement speed is greater than or equal to the second speed threshold, the receiving terminal may determine a change trend of the position relationship with the sending terminal according to the first position. If the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, the receiving terminal and the sending terminal move close to each other according to the second movement speed v₂And a first movement speed v₁Is calculated by equation 2, the second doppler shift f of the reference information is calculated_2mAt this time, f in equation 2_mIs f_2mV is v₁+v₂. In this case, the receiving terminal may perform correction using the second doppler frequency shift taking a negative value when demodulating the valid information.

If the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, the receiving terminal and the sending terminal move away from each other according to a second movement speed v₂And a first movement speed v₁Is calculated by equation 2, the third doppler shift f of the reference information is calculated_3mAt this time, f in equation 2_mIs f_3mV is | v₁-v₂L. In this case, the receiving terminal may perform correction using the third doppler shift value when demodulating the valid information.

In the technical scheme provided by the embodiment of the disclosure, when the receiving terminal demodulates the effective information, the doppler shift correction can be performed according to the first movement speed and the second movement speed of the sending terminal, so that the effect of effective information demodulation is improved, and the accuracy of obtaining the effective information is further improved.

Fig. 3 is an interaction diagram of a doppler shift correction method according to an exemplary embodiment, where an execution subject is a sending terminal and a receiving terminal, and both the sending terminal and the receiving terminal in this embodiment may be an intercom that sends cloud cause information, as shown in fig. 3, the method includes the following steps 301 to 322:

in step 301, the transmitting terminal calculates a first speed threshold corresponding to the current reference frequency according to the error range allowed by the system.

In step 302, if it is necessary to send a voice signal to the receiving terminal, the sending terminal obtains a current first movement speed.

In step 303, the transmitting terminal determines whether the first moving speed is greater than or equal to a first speed threshold; if the first moving speed is less than the first speed threshold, go to step 304; if the first moving speed is greater than or equal to the first speed threshold, step 305 is performed.

In step 304, the transmitting terminal transmits the voice signal to the receiving terminal.

In step 305, the sending terminal obtains a first location where the sending terminal is currently located.

In step 306, the transmitting terminal generates reference information according to the voice signal, the first movement velocity and the first position.

In step 307, the transmitting terminal transmits the reference information to the receiving terminal.

In step 308, the receiving terminal calculates a second speed threshold corresponding to the current reference frequency according to the error range allowed by the system.

The second speed threshold may be the same as or different from the first speed threshold.

In step 309, the receiving terminal acquires the current second movement speed.

In step 310, the receiving terminal determines whether the second moving speed is greater than or equal to a second speed threshold; if the second moving speed is less than the second speed threshold, go to step 311; if the second movement speed is greater than or equal to the second speed threshold, go to step 317.

In step 311, the receiving terminal acquires a first moving velocity of the transmitting terminal included in the reference information.

In step 312, the receiving terminal calculates a first doppler shift frequency according to the first motion velocity.

In step 313, the receiving terminal determines a position variation trend with the transmitting terminal according to the first position of the transmitting terminal included in the reference information.

In step 314, the receiving terminal determines whether to approach the sending terminal according to the position variation trend; if the receiving terminal and the sending terminal are close to each other, go to step 315; if the receiving terminal and the sending terminal are far away from each other, go to step 316.

In step 315, the receiving terminal performs a correction using the first doppler shift taking a negative value.

In step 316, the receiving terminal performs correction using the first doppler shift value.

In step 317, the receiving terminal determines a position variation tendency with the transmitting terminal according to the first position of the transmitting terminal included in the reference information.

In step 318, the receiving terminal determines whether to approach the sending terminal according to the position variation trend; if the receiving terminal and the sending terminal are close to each other, go to step 319; if the receiving terminal and the transmitting terminal are far away from each other, step 321 is executed.

In step 319, the receiving terminal calculates a second doppler shift using the sum of the first moving velocity and the second moving velocity.

In step 320, the receiving terminal performs a correction using the second doppler frequency shift taking a negative value.

In step 321, the receiving terminal calculates a third doppler shift using the difference between the first moving velocity and the second moving velocity.

In step 322, the receiving terminal performs correction using the third doppler shift value.

The embodiment of the disclosure provides a doppler shift correction method, in which a sending terminal can send a current first position and a current first moving speed to a receiving terminal, and the receiving terminal performs doppler shift correction according to the first moving speed and the first position when demodulating effective information, so that an effective information demodulation effect is improved, and further, an accuracy rate of obtaining effective information is improved.

The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods.

Fig. 4a is a schematic diagram illustrating a structure of a doppler shift correction apparatus 40 according to an exemplary embodiment, where the apparatus 40 can be implemented as part of or all of an electronic device through software, hardware or a combination of both. As shown in fig. 4a, the doppler shift correction device 40 includes a first obtaining module 401, a generating module 402 and a transmitting module 403.

The first obtaining module 401 is configured to obtain a current first movement speed and a current first position of the sending terminal.

A generating module 402, configured to generate reference information according to the first motion speed, the first position, and valid information to be sent.

A sending module 403, configured to send the reference information to a receiving terminal, so that the receiving terminal performs doppler shift correction according to the first motion speed and the first position when demodulating the valid information.

In one embodiment, as shown in fig. 4b, the generating module 402 includes a generating sub-module 4021, and the generating sub-module 4021 is configured to generate reference information according to the first moving speed, the first location, and valid information to be transmitted when the first moving speed is greater than or equal to a first speed threshold.

In an embodiment, as shown in fig. 4c, the apparatus 40 further includes a second obtaining module 404, where the second obtaining module 404 is configured to obtain the first speed threshold corresponding to the reference frequency according to the reference frequency of the current operation.

The embodiment of the disclosure provides a doppler shift correction device, which can send a current first position and a current first movement speed to a receiving terminal, so that the receiving terminal can perform doppler shift correction according to the first movement speed and the first position when demodulating effective information, thereby improving the effect of effective information demodulation and further improving the accuracy of obtaining the effective information.

Fig. 5a is a schematic structural diagram illustrating a doppler shift correction apparatus 50 according to an exemplary embodiment, where the apparatus 50 may be implemented as part of or all of an electronic device through software, hardware or a combination of both. As shown in fig. 5a, the doppler shift correction device 50 includes a receiving module 501 and a correction module 502.

The receiving module 501 is configured to receive reference information sent by a sending terminal, where the reference information includes valid information, a current first motion speed of the sending terminal, and a current first position of the sending terminal.

A correction module 502, configured to perform doppler shift correction according to the first motion speed and the first position when the valid information is demodulated.

In one embodiment, as shown in FIG. 5b, the correction module 502 includes a first acquisition sub-module 5021, a first determination module 5022, and a first correction sub-module 5023.

The first obtaining submodule 5021 is configured to obtain a first doppler shift of the reference information according to the first motion speed.

A first determining module 5022, configured to determine a location relationship change trend with the sending terminal according to the first location.

The first correction submodule 5023 is configured to correct the effective information by using the first doppler shift according to the position relationship change trend.

In one embodiment, as shown in fig. 5c, the first acquisition submodule 5021 comprises a first acquisition unit 5021a and a second acquisition unit 5021 b.

The first acquiring unit 5021a is configured to acquire a current second moving speed of the receiving terminal.

A second obtaining unit 5021b, configured to obtain a first doppler shift of the reference information according to the first moving speed when the second moving speed is less than a second speed threshold.

In one embodiment, as shown in fig. 5d, the first acquisition sub-module 5021 comprises a third acquisition unit 5021c, and the third acquisition unit 5021c is configured to acquire a first doppler shift of the reference information according to the first motion speed when the first motion speed is greater than or equal to a third speed threshold.

In an embodiment, as shown in fig. 5e, the first correction submodule 5023 includes a first correction unit 5023a, and the first correction unit 5023a is configured to, if it is determined that the receiving terminal and the sending terminal are close to each other according to the position relationship change trend, perform correction by using the first doppler frequency shift to take a negative value when demodulating the valid information.

In one embodiment, as shown in fig. 5f, the first correction submodule 5023 includes a second correction unit 5023b, and the second correction unit 5023b is configured to perform correction by using the first doppler frequency shift value when demodulating the effective information if it is determined that the receiving terminal and the transmitting terminal are far away from each other according to the position relationship change trend.

In one embodiment, as shown in FIG. 5g, the correction module 502 includes a second fetch submodule 5024, a second determination module 5025 and a second correction submodule 5026.

The second obtaining submodule 5024 is configured to obtain a current second moving speed of the receiving terminal.

A second determining module 5025, configured to determine a position relationship change trend with the sending terminal according to the first position when the second moving speed is greater than or equal to the second speed threshold.

And the second correction submodule 5026 is configured to perform doppler shift correction according to the position relationship change trend, the second motion speed, and the first motion speed when the valid information is demodulated.

In one embodiment, as shown in fig. 5h, the second correction submodule 5026 comprises a fourth acquisition unit 5026a and a second correction unit 5026 b.

The fourth obtaining unit 5026a is configured to, if it is determined that the receiving terminal and the sending terminal are close to each other according to the position relationship change trend, obtain a second doppler frequency shift of the reference information according to a sum of the second moving speed and the first moving speed.

A second correction unit 5026b, configured to perform correction by using the second doppler shift taking a negative value when the effective information is demodulated.

In one embodiment, as shown in fig. 5i, the second correction submodule 5026 comprises a fifth acquiring unit 5026c and a third correcting unit 5026 d.

A fifth obtaining unit 5026c, configured to obtain a third doppler frequency shift of the reference information according to a difference between the second motion speed and the first motion speed if the receiving terminal and the sending terminal are determined to be far away from each other according to the position relationship change trend.

A third correcting unit 5026d, configured to correct the valid information by using the third doppler shift value.

The embodiment of the disclosure provides a doppler shift correction device, which can correct doppler shift according to a first position of a sending terminal and a first movement speed of current movement of the sending terminal when effective information is demodulated, so that the effect of effective information demodulation is improved, and further, the accuracy of obtaining the effective information is improved.

The disclosed embodiment provides a doppler shift correction device, which includes:

a first processor;

a first memory for storing first processor-executable instructions;

wherein the first processor is configured to:

In one embodiment, the first processor may be further configured to: and when the first movement speed is greater than or equal to a first speed threshold value, generating reference information according to the first movement speed, the first position and effective information to be sent.

In one embodiment, the first processor may be further configured to: and acquiring the first speed threshold corresponding to the reference frequency according to the currently working reference frequency.

a second processor;

a second memory for storing second processor-executable instructions;

wherein the second processor is configured to:

In one embodiment, the second processor may be further configured to: acquiring a first Doppler frequency shift of the reference information according to the first movement speed; determining a position relation change trend with the sending terminal according to the first position; and when the effective information is demodulated, correcting by adopting the first Doppler frequency shift according to the position relation change trend.

In one embodiment, the second processor may be further configured to: acquiring a current second movement speed of the receiving terminal; and when the second movement speed is smaller than a second speed threshold value, acquiring a first Doppler frequency shift of the reference information according to the first movement speed.

In one embodiment, the second processor may be further configured to: and when the first movement speed is greater than or equal to a third speed threshold, acquiring a first Doppler frequency shift of the reference information according to the first movement speed.

In one embodiment, the second processor may be further configured to: and if the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, the first Doppler frequency shift negative value is adopted for correction when the effective information is demodulated.

In one embodiment, the second processor may be further configured to: and if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, the first Doppler frequency shift positive value is adopted for correction when the effective information is demodulated.

In one embodiment, the second processor may be further configured to: acquiring a current second movement speed of the receiving terminal; when the second movement speed is greater than or equal to the second speed threshold, determining a position relation change trend with the sending terminal according to the first position; and when the effective information is demodulated, performing Doppler frequency shift correction according to the position relation change trend, the second movement speed and the first movement speed.

In one embodiment, the second processor may be further configured to: if the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, acquiring a second Doppler frequency shift of the reference information according to the sum of the second movement speed and the first movement speed; and when the effective information is demodulated, correcting by adopting the second Doppler frequency shift negative value.

In one embodiment, the second processor may be further configured to: if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, obtaining a third Doppler frequency shift of the reference information according to the difference value of the second movement speed and the first movement speed; and when the effective information is demodulated, correcting by adopting the third Doppler frequency shift positive value.

With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.

Fig. 6 is a block diagram illustrating a structure of an apparatus 60 for correcting doppler shift according to an exemplary embodiment, wherein the apparatus 60 is suitable for a transmitting terminal or a receiving terminal. For example, the apparatus 60 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a walkie-talkie, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like.

The apparatus 60 may include one or more of the following components: processing component 602, memory 604, power component 606, multimedia component 608, audio component 610, input/output (I/O) interface 612, sensor component 614, and communication component 616.

The processing component 602 generally controls overall operation of the device 60, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 602 may include one or more processors 620 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 602 can include one or more modules that facilitate interaction between the processing component 602 and other components. For example, the processing component 602 can include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.

The memory 604 is configured to store various types of data to support operations at the apparatus 60. Examples of such data include instructions for any application or method operating on the device 60, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 604 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

Power supply component 606 provides power to the various components of device 60. Power components 606 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for device 60.

The multimedia component 608 includes a screen that provides an output interface between the device 60 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 608 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 60 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 610 is configured to output and/or input audio signals. For example, audio component 610 includes a Microphone (MIC) configured to receive external audio signals when apparatus 60 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 604 or transmitted via the communication component 616. In some embodiments, audio component 610 further includes a speaker for outputting audio signals.

The I/O interface 612 provides an interface between the processing component 602 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 614 includes one or more sensors for providing various aspects of status assessment for the device 60. For example, the sensor assembly 614 may detect the open/closed status of the device 60, the relative positioning of the components, such as the display and keypad of the device 60, the sensor assembly 614 may also detect a change in the position of the device 60 or a component of the device 60, the presence or absence of user contact with the device 60, the orientation or acceleration/deceleration of the device 60, and a change in the temperature of the device 60. The sensor assembly 614 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 614 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 614 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 616 is configured to facilitate communications between the apparatus 60 and other devices in a wired or wireless manner. The device 60 may access a wireless network based on a communication standard, such as a walkie-talkie private network, WiFi, 2G, 3G, 4G or 5G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 60 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described doppler shift correction method at the transmitting terminal side or the doppler shift correction method at the receiving terminal side.

In an exemplary embodiment, a non-transitory computer-readable storage medium, such as the memory 604, is also provided that includes instructions executable by the processor 620 of the apparatus 60 to perform the above-described doppler shift correction method at the transmitting terminal side or the doppler shift correction method at the receiving terminal side. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

A non-transitory computer-readable storage medium, in which instructions, when executed by a processor of an apparatus 60, enable the apparatus 60 to perform the above-described doppler shift correction method on a transmitting terminal side, the method comprising:

In one embodiment, the generating reference information according to the first movement speed, the first position and valid information to be transmitted includes: and when the first movement speed is greater than or equal to a first speed threshold value, generating reference information according to the first movement speed, the first position and effective information to be sent.

In one embodiment, the method further comprises: and acquiring the first speed threshold corresponding to the reference frequency according to the currently working reference frequency.

A non-transitory computer-readable storage medium in which instructions, when executed by a processor of an apparatus 60, enable the apparatus 60 to perform the above-described doppler shift correction method on a receiving terminal side, the method comprising:

In one embodiment, the performing doppler shift correction according to the first motion velocity and the first position when demodulating the effective information includes: acquiring a first Doppler frequency shift of the reference information according to the first movement speed; determining a position relation change trend with the sending terminal according to the first position; and when the effective information is demodulated, correcting by adopting the first Doppler frequency shift according to the position relation change trend.

In one embodiment, the obtaining a first doppler shift of the reference information according to the first motion velocity includes: acquiring a current second movement speed of the receiving terminal; and when the second movement speed is smaller than a second speed threshold value, acquiring a first Doppler frequency shift of the reference information according to the first movement speed.

In one embodiment, the obtaining a first doppler shift of the reference information according to the first motion velocity includes: and when the first movement speed is greater than or equal to a third speed threshold, acquiring a first Doppler frequency shift of the reference information according to the first movement speed.

In one embodiment, the performing, when demodulating the effective information, correction using the first doppler shift according to the position relation variation tendency includes: and if the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, the first Doppler frequency shift negative value is adopted for correction when the effective information is demodulated.

In one embodiment, the performing, when demodulating the effective information, correction using the first doppler shift according to the position relation variation tendency includes: and if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, the first Doppler frequency shift positive value is adopted for correction when the effective information is demodulated.

In one embodiment, the performing doppler shift correction according to the first motion velocity and the first position when demodulating the effective information includes: acquiring a current second movement speed of the receiving terminal; when the second movement speed is greater than or equal to the second speed threshold, determining a position relation change trend with the sending terminal according to the first position; and when the effective information is demodulated, performing Doppler frequency shift correction according to the position relation change trend, the second movement speed and the first movement speed.

In one embodiment, the performing doppler shift correction according to the position relation change trend, the second moving speed, and the first moving speed when demodulating the effective information includes: if the receiving terminal and the sending terminal are determined to be close to each other according to the position relation change trend, acquiring a second Doppler frequency shift of the reference information according to the sum of the second movement speed and the first movement speed; and when the effective information is demodulated, correcting by adopting the second Doppler frequency shift negative value.

In one embodiment, the performing doppler shift correction according to the position relation change trend, the second moving speed, and the first moving speed when demodulating the effective information includes: if the receiving terminal and the sending terminal are determined to be away from each other according to the position relation change trend, obtaining a third Doppler frequency shift of the reference information according to the difference value of the second movement speed and the first movement speed; and when the effective information is demodulated, correcting by adopting the third Doppler frequency shift positive value.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A Doppler frequency shift correction method is applied to a sending terminal, the sending terminal comprises an interphone, and the method comprises the following steps:

the method comprises the steps that a current first movement speed and a current first position of a sending terminal are obtained when effective information is sent each time; the effective information comprises voice information;

generating reference information according to the first movement speed, the first position and effective information to be sent, including: adding the first movement speed and the first position into a header of effective information to be sent, and modulating the effective information added with the first movement speed and the first position in the header onto a carrier wave of a reference frequency to generate the reference information;

and sending the reference information to a receiving terminal so that the receiving terminal can perform Doppler frequency shift correction according to the first movement speed, the current second movement speed of the receiving terminal and the first position when demodulating the effective information, wherein the receiving terminal comprises an interphone.

2. The method of claim 1, wherein the generating reference information according to the first motion speed, the first position and valid information to be transmitted comprises:

3. The method of claim 2, further comprising:

4. A Doppler frequency shift correction method is applied to a receiving terminal, the receiving terminal comprises an interphone, and the method comprises the following steps:

receiving reference information sent by a sending terminal, wherein the reference information comprises effective information, a current first movement speed of the sending terminal and a current first position of the sending terminal, and the reference information is generated by adding the first movement speed and the first position into an information header of the effective information to be sent by the sending terminal and modulating the effective information added with the first movement speed and the first position into a carrier wave of a reference frequency; the sending terminal comprises an interphone, and the effective information comprises voice information;

when the effective information is demodulated, performing Doppler frequency shift correction according to the first motion speed and the first position;

the performing doppler shift correction according to the first motion velocity and the first position when demodulating the effective information includes:

and when the effective information is demodulated, performing Doppler frequency shift correction according to the first movement speed, the current second movement speed of the receiving terminal and the first position.

5. The method of claim 4, wherein the performing Doppler shift correction according to the first motion velocity and the first position while demodulating the effective information comprises:

6. The method of claim 5, wherein the obtaining the first Doppler shift of the reference information according to the first motion velocity comprises:

acquiring a current second movement speed of the receiving terminal;

7. The method of claim 5, wherein the obtaining the first Doppler shift of the reference information according to the first motion velocity comprises:

8. The method according to any one of claims 5 to 7, wherein the performing the correction using the first doppler shift according to the position relation change trend when demodulating the effective information comprises:

9. The method according to any one of claims 5 to 7, wherein the performing the correction using the first doppler shift according to the position relation change trend when demodulating the effective information comprises:

10. The method of claim 4, wherein the performing Doppler shift correction according to the first motion velocity and the first position while demodulating the effective information comprises:

acquiring a current second movement speed of the receiving terminal;

when the second movement speed is greater than or equal to a second speed threshold, determining a position relation change trend with the sending terminal according to the first position;

11. The method according to claim 10, wherein the performing doppler shift correction according to the position relation change tendency, the second moving speed, and the first moving speed when demodulating the effective information includes:

12. The method according to claim 10, wherein the performing doppler shift correction according to the position relation change tendency, the second moving speed, and the first moving speed when demodulating the effective information includes:

13. A Doppler frequency shift correction device, which is applied to a transmitting terminal, wherein the transmitting terminal comprises an interphone, and the device comprises:

the first acquisition module is used for acquiring the current first movement speed and the current first position of the sending terminal when the effective information is sent each time; the effective information comprises voice information;

a generating module, configured to generate reference information according to the first motion speed, the first position, and valid information to be sent, including: adding the first movement speed and the first position into a header of effective information to be sent, and modulating the effective information added with the first movement speed and the first position in the header onto a carrier wave of a reference frequency to generate the reference information;

and the sending module is used for sending the reference information to a receiving terminal so that the receiving terminal can carry out Doppler frequency shift correction according to the first movement speed, the current second movement speed of the receiving terminal and the first position when demodulating the effective information, wherein the receiving terminal comprises an interphone.

14. The apparatus of claim 13, wherein the generating module comprises:

15. The apparatus of claim 14, further comprising:

16. A Doppler frequency shift correction device is applied to a receiving terminal, the receiving terminal comprises an interphone, and the device comprises:

the receiving module is used for receiving reference information sent by a sending terminal, wherein the reference information comprises effective information, a current first movement speed of the sending terminal and a current first position of the sending terminal, and the reference information is generated by adding the first movement speed and the first position into an information header of the effective information to be sent by the sending terminal and modulating the effective information added with the first movement speed and the first position in the information header onto a carrier wave of a reference frequency; the sending terminal comprises an interphone, and the effective information comprises voice information;

the correction module is used for performing Doppler frequency shift correction according to the first movement speed and the first position when the effective information is demodulated;

the correction module is specifically configured to, when demodulating the valid information, perform doppler shift correction according to the first moving speed, a current second moving speed of the receiving terminal, and the first position.

17. The apparatus of claim 16, wherein the correction module comprises:

18. The apparatus of claim 17, wherein the first obtaining sub-module comprises:

19. The apparatus of claim 17, wherein the first obtaining sub-module comprises:

20. The apparatus of any one of claims 17 to 19, wherein the first correction submodule comprises:

21. The apparatus of any one of claims 17 to 19, wherein the first correction submodule comprises:

22. The apparatus of claim 16, wherein the correction module comprises:

the second determining module is used for determining a position relation change trend with the sending terminal according to the first position when the second movement speed is greater than or equal to a second speed threshold;

23. The apparatus of claim 22, wherein the second syndrome module comprises:

24. The apparatus of claim 22, wherein the second syndrome module comprises:

25. A Doppler frequency shift correction device, which is applied to a transmitting terminal, wherein the transmitting terminal comprises an interphone, and the device comprises:

a first processor;

a first memory for storing first processor-executable instructions;

wherein the first processor is configured to:

the method comprises the steps of obtaining a current first movement speed and a current first position of a sending terminal when effective information is sent each time; the effective information comprises voice information;

26. A Doppler frequency shift correction device is applied to a receiving terminal, the receiving terminal comprises an interphone, and the device comprises:

a second processor;

a second memory for storing second processor-executable instructions;

wherein the second processor is configured to:

receiving reference information sent by a sending terminal, wherein the reference information comprises effective information, a current first movement speed of the sending terminal and a current first position of the sending terminal; the reference information is generated by the transmitting terminal adding the first moving speed and the first position into an information header of effective information to be transmitted and modulating the effective information added with the first moving speed and the first position in the information header onto a carrier wave of a reference frequency; the sending terminal comprises an interphone, and the effective information comprises voice information;

27. A computer-readable storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 3.

28. A computer-readable storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 4 to 12.