CN113271197B - Demodulation reference signal processing method and device and electronic equipment - Google Patents

Demodulation reference signal processing method and device and electronic equipment Download PDF

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CN113271197B
CN113271197B CN202110545569.6A CN202110545569A CN113271197B CN 113271197 B CN113271197 B CN 113271197B CN 202110545569 A CN202110545569 A CN 202110545569A CN 113271197 B CN113271197 B CN 113271197B
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dmrs
channel
position information
data frame
preset
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CN113271197A (en
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张力方
胡泽妍
刘洋
胡云
冯毅
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a demodulation reference signal processing method, a demodulation reference signal processing device and electronic equipment, wherein the method comprises the steps of receiving a data frame corresponding to a to-be-processed service sent by a sending end, wherein the data frame corresponding to the to-be-processed service comprises a demodulation reference signal DMRS and channel information of each effective subcarrier in an uplink channel, determining the position information of the DMRS according to a preset processing rule, determining the position information of the DMRS and a channel response value corresponding to the position information except the position information of the DMRS according to a preset channel estimation rule, performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information, realizing the to-be-processed service according to the calibrated channel information, reducing the number of symbols occupied by the DMRS, and further increasing the resource occupancy rate of effective data.

Description

Demodulation reference signal processing method and device and electronic equipment
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a demodulation reference signal processing method and device and electronic equipment.
Background
With the development of network systems, the application of LTE (Long Term Evolution) is becoming more and more popular. Because the wireless channel has larger randomness, a reference signal with a certain format is designed in the LTE system to ensure that the relevant information of the channel is obtained, and demodulation and the like are performed according to the obtained relevant information, so that accurate reception of a useful signal is finally realized.
In the prior art, there are various Downlink Reference Signals of the LTE Physical layer, which mainly include CRS (Cell-specific Reference Signals), DMRS (Demodulation Reference Signals), PRS (Positioning Reference Signals), and the specific Reference Signal used depends on which Reference Signal is used for PDSCH (Physical Downlink Shared Channel) decoding.
Aiming at the DMRS reference signals, when uplink data is transmitted, each user resource scheduling period needs at least one DMRS symbol, the reference signals occupy large expense, and further the resource occupancy rate of effective data in the transmission process is reduced.
Disclosure of Invention
The embodiment of the invention provides a demodulation reference signal processing method, a demodulation reference signal processing device and electronic equipment, which are used for improving the resource occupancy rate of effective data in a transmission process.
In a first aspect, an embodiment of the present invention provides a demodulation reference signal processing method, including:
receiving a data frame corresponding to a to-be-processed service sent by a sending end, wherein the data frame corresponding to the to-be-processed service comprises a demodulation reference signal DMRS and channel information of each effective subcarrier in an uplink channel;
determining the position information of the DMRS according to a preset processing rule;
determining the position information of the DMRS and a channel response value corresponding to the position information except the position information of the DMRS according to a preset channel estimation rule;
and performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information, and realizing the service to be processed according to the calibrated channel information.
Optionally, the determining, according to a preset channel estimation rule, the position information of the DMRS and a channel response value corresponding to the position information except the position information of the DMRS includes:
determining a first channel response value corresponding to the position information of the DMRS according to a first channel estimation rule;
determining a second channel response value corresponding to the position information except the position information of the DMRS according to an interpolation method;
then, the performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information includes:
and performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the obtained first channel response value and the obtained second channel response value to obtain calibrated channel information.
Optionally, the determining the location information of the DMRS according to a preset processing rule includes:
determining the number of users contained in a subdata frame with preset time duration in the data frame according to the user identification;
if the number of the users is one, determining the position information of the DMRS according to a first preset processing rule;
and if the number of the users is more than one, determining the position information of the DMRS according to a second preset processing rule.
Optionally, if the number of the users is one, determining the location information of the DMRS according to a first preset processing rule includes:
if the number of the users is one and the transmission of the service corresponding to the (n 1) th user is completed for the first time in the sub-data frame, when TTI (Num-request-n 1) <7 and (Num-request-n 1) =1, setting a DMRS in the first half frame of the sub-data frame;
and when TTI (Num-request-n 1) ≥ 7 and (Num-request-n 1) =2, setting a DMRS in the latter half frame of the sub-data frame, wherein TTI is a user resource scheduling period, and (Num-request-n 1) represents the service request times of the (n 1) th user in the sub-data frame with a preset time length.
Optionally, if the number of the users is greater than one, determining the location information of the DMRS according to a second preset processing rule includes:
if the number of the users is greater than one, and when the TTI is not greater than a first preset threshold, setting an expression of the position of the DMRS as follows:
Km1n2；
where, TTI represents a user resource scheduling period, km1n2 represents the positions of OFDM in the m1 th row and the n2 th column in one sub data frame.
Optionally, the method further includes:
if the number of the users is greater than one, and when the TTI is greater than a first preset threshold and not greater than a second preset threshold, the position of the DMRS is as follows:
in the TTI, the first DMRS location is numbered Km2n3,
when a service request of a second user comes in the sub-data frame, judging the relation between the sub-data frame and the sequence number of the first DMRS in the TTI;
if the absolute value of B1-F1 is more than or equal to 3, the new DMRS is not needed to be added to the service of the new user;
if the | B1-F1| is less than 3, a new DMRS is required to be correspondingly added to the service of the newly added user and is arranged on the Km2n 3;
where Bn3 represents a sequence number of an OFDM in the time domain, where the OFDM starts in the time domain, where the nth 3 user occupies the OFDM, where Fn3 represents a sequence number of an OFDM in the time domain, where the OFDM occupies the nth 3 user ends in the time domain, n3= |13-Bn3+1|/2, and m2 is any natural number from 0 to 11.
In a second aspect, an embodiment of the present invention provides a demodulation reference signal processing apparatus, including:
the receiving module is used for receiving a data frame corresponding to a to-be-processed service sent by a sending end, wherein the data frame corresponding to the to-be-processed service comprises a demodulation reference signal DMRS and channel information of each effective subcarrier in an uplink channel;
the processing module is used for determining the position information of the DMRS according to a preset processing rule;
the processing module is further configured to determine, according to a preset channel estimation rule, the position information of the DMRS and a channel response value corresponding to the position information other than the position information of the DMRS;
the processing module is further configured to perform compensation calibration on channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information, and implement the service to be processed according to the calibrated channel information.
In a third aspect, an embodiment of the present invention provides an electronic device, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes computer-executable instructions stored by the memory, so that the at least one processor performs the demodulation reference signal processing method according to any one of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer executing instruction is stored, and when a processor executes the computer executing instruction, the method for processing a demodulation reference signal according to any one of the first aspect is implemented.
In a fifth aspect, an embodiment of the present invention provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the computer program implements the demodulation reference signal processing method according to the first aspect and various possible designs of the first aspect.
The embodiment of the invention provides a demodulation reference signal processing method, a demodulation reference signal processing device and electronic equipment, and after the scheme is adopted, a data frame corresponding to a service to be processed sent by a sending end can be received, wherein the data frame comprises a DMRS (demodulation reference signal) and channel information of each effective subcarrier in an uplink channel, then the position information of the DMRS is determined according to a preset processing rule, then the position information of the DMRS and a channel response value corresponding to the position information except the position information of the DMRS are determined according to a preset channel estimation rule, finally, compensation calibration is carried out on the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated information, the service to be processed is realized according to the calibrated channel information, the number of symbols occupied by the DMRS is reduced by determining the position information of the DMRS according to the preset processing rule and multiplexing the existing DMRS reference signal as much as possible, and the occupancy rate of effective data resources is increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating an application of DMRS time-frequency resource allocation in the prior art;
fig. 2 is a schematic flowchart of a demodulation reference signal processing method according to an embodiment of the present invention;
fig. 3 is an application diagram of a service processing success prompt provided in the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a demodulation reference signal processing apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of including other sequential examples in addition to those illustrated or described. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the prior art, there are various Downlink Reference signals of the LTE Physical layer, which mainly include CRS (Cell-specific Reference signals), DMRS (Demodulation Reference Signal), PRS (Positioning Reference Signal), and the specific Reference Signal used depends on which Reference Signal is used for decoding PDSCH (Physical Downlink Shared Channel). For DMRS reference signals, DMRS is mainly used in elevation beamforming and FD-MIM0 technology in downlink, and in LTE Release8, a downlink transmission mode based on DMRS is proposed, where transmission mode 7 is used for beamforming for single-layer transmission and transmission mode 8 is used for dual-layer. In addition, the flexible application of the DMRS is also helpful for implementing various downlink transmission schemes, such as a multi-user multiple-input multiple-output (mu mimo) technique and coordinated multi-point transmission. Specifically, in the downlink frame structure design of the LTE Release8 system, DMRSs occupy 6 REs in each RB to support dual-layer transmission, so that DMRS overhead accounts for 7% (i.e., each RB contains 7 × 12= 84res), whereas in Release10, 12 REs are used in each proposed RB to support higher 8-layer transmission, which accounts for 14%.
Fig. 1 is a schematic diagram illustrating an application of DMRS time-Frequency resource allocation in the prior art, as shown in fig. 1, in the prior art, taking Release8 as an example, two pairs of 6 REs are allocated to 3 sub-carrier Frequency bands of the last two symbols, and a large square grid represents 12 sub-carriers in the Frequency domain and 1 OFDM (Orthogonal Frequency Division Multiplexing) in the time domain in a conventional LTE-sub data frame, where squares except (5754 zft 5754), (3252 zft 3252), (3532 zft 3532) and (3425 zft 3425) in the leftmost two columns represent DMRS reference signals. That is, when uplink data is transmitted, each user resource scheduling period needs at least one DMRS symbol, and the reference signal occupies a large amount of overhead, thereby reducing the resource occupancy rate of effective data in the transmission process.
Based on the above problems, the method and the device for processing the DMRS achieve the advantages of reducing the number of symbols occupied by the DMRS and increasing the resource occupancy rate of effective data by determining the position information of the DMRS according to the preset processing rule and multiplexing the existing DMRS reference signals as much as possible.
The technical means of the present invention will be described in detail with reference to specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a schematic flow chart of a demodulation reference signal processing method according to an embodiment of the present invention, where the method of this embodiment may be executed by a receiving end, as shown in fig. 2, the method of this embodiment may include:
s201: and receiving a data frame corresponding to the to-be-processed service sent by the sending end, wherein the data frame corresponding to the to-be-processed service comprises the DMRS and channel information of each effective subcarrier in the uplink channel.
In this embodiment, when a to-be-processed service interacting between two ends is involved, the sending end may send a data frame corresponding to the to-be-processed service to the receiving end, and the receiving end may further perform analysis and processing according to the received data frame corresponding to the to-be-processed service, thereby implementing the to-be-processed service.
The service to be processed may be end-to-end two-way voice service, mobile message service, and message service initiated by and received by the mobile station provided by the GSM network and the message platform. Mobile bearer service, mobile data service thereon, and mobile supplementary service, such as calling number display, call forwarding, etc. The mobile intelligent network services provided by the GSM network and the intelligent network, such as prepaid service, domestic roaming service, international roaming service, etc.
Further, the transmitting end and the receiving end can transmit data through the base station. The transmitting end and the receiving end can be smart phones, smart watches or other intelligent wearable devices capable of achieving remote communication.
S202: and determining the position information of the DMRS according to a preset processing rule.
In this embodiment, after receiving the DMRS, the location information of the DMRS may be determined according to a preset processing rule.
Further, determining the location information of the DMRS according to a preset processing rule may specifically include:
and determining the number of users contained in the sub data frames with preset time duration in the data frames according to the user identification.
And if the number of the users is one, determining the position information of the DMRS according to a first preset processing rule.
And if the number of the users is more than one, determining the position information of the DMRS according to a second preset processing rule.
Specifically, different preset processing rules can be selected according to the user request condition, and then the position information of the DMRS is determined according to the selected preset processing rules, that is, according to the user request condition, the existing DMRS reference signals are multiplexed as much as possible, so as to reduce the number of occupied symbols and increase the resource occupancy rate of the effective data.
In one implementation, if the number of users is one, that is, when the sub data frames within a preset time duration are all the same user, when the nth user service completes transmission within the sub data frame for the first time: (Num-request-n 1), determining the location information of the DMRS according to a first preset processing rule, which may specifically include:
if the number of the users is one, and when the service corresponding to the (n 1) th user completes transmission in the sub data frame for the first time, when TTI (Num-request-n 1) <7 and (Num-request-n 1) =1, setting a DMRS in the first half frame of the sub data frame.
And when TTI (Num-request-n 1) ≥ 7 and (Num-request-n 1) =2, setting a DMRS in the latter half frame of the sub-data frame, wherein TTI is a user resource scheduling period, and (Num-request-n 1) represents the service request times of the (n 1) th user in the sub-data frame with a preset time length.
The preset time length may be 1ms, that is, the time length of the sub data frame may be 1ms.
In another implementation, if the number of users is greater than one, determining the location information of the DMRS according to a second preset processing rule may specifically include:
if the number of users is greater than one, and when the TTI is not greater than a first preset threshold, the position setting expression of the DMRS is as follows:
Km1n2；
wherein, TTI represents a user resource scheduling period, km1n2 represents the position of OFDM in the m1 th row and the n2 th column in one sub data frame.
Specifically, the sub-data frame may be a data frame with a duration of 1ms, and when different users exist in a 1ms subframe, since symbol intervals between DMRSs of the different users cannot be greater than 3, TTI =5 is a boundary, that is, the first preset threshold is any value of 5, m =2, n =0 to 13.
In addition, if the number of users is greater than one, and when the TTI is greater than a first preset threshold and is not greater than a second preset threshold, the position of the DMRS is:
in the TTI, the first DMRS location is numbered Km2n3,
and when a service request of a second user comes in the sub-data frame, judging the relation between the sub-data frame and the sequence number of the first DMRS in the TTI.
And if the | B1-F1| is more than or equal to 3, the new DMRS is not required to be added to the service of the new user.
And if the absolute value B1-F1 is less than 3, a new DMRS is required to be correspondingly added to the service of the newly added user and is arranged on the Km2n 3.
Where Bn3 represents a sequence number of an OFDM symbol occupied by the nth 3 user starting in the time domain, fn3 represents a sequence number of an OFDM symbol occupied by the nth 3 user ending in the time domain, n3= |13-Bn3+1|/2, and m2 is any natural number from 0 to 11.
Specifically, the sub-data frame may be a data frame with a duration of 1ms, and when different users exist in a 1ms subframe, because symbol intervals between DMRSs of the different users cannot be greater than 3, TTI =5 is a boundary, that is, the first preset threshold is 5, the second preset threshold is 14, n = |13-Bn +1|/2, and if n is a fractional number, the fractional number is rounded up, and m is any natural number from 0 to 11.
DMRS reference signal allocation is carried out by considering resource scheduling period, user identification and the like, so that the utilization rate of network resources is improved, and the network overhead is reduced.
S203: and determining the position information of the DMRS and a channel response value corresponding to the position information except the position information of the DMRS according to a preset channel estimation rule.
In this embodiment, after the position information of the DMRS is determined, channel response value estimation may be performed on the position information of the DMRS and other position information except the position information of the DMRS according to a preset channel estimation rule, so as to determine a corresponding channel response value.
Further, a first channel response value corresponding to the location information of the DMRS may be determined according to the first channel estimation rule.
And determining a second channel response value corresponding to the position information except the position information of the DMRS according to an interpolation method.
Specifically, the first channel estimation rule may adopt an existing channel estimation rule to perform channel estimation on the location information of the DMRS, and is not discussed in detail herein.
S204: and performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information, and realizing the service to be processed according to the calibrated channel information.
In this embodiment, two channel response values, that is, a first channel response value and a second channel response value, may be determined, and then compensation calibration may be performed on channel information of each effective subcarrier in the uplink channel according to the obtained first channel response value and the obtained second channel response value, so as to obtain calibrated channel information.
In addition, after the calibrated channel information is obtained, processing can be performed according to the calibrated channel information, so as to implement a service to be processed, which can illustratively implement a call service, an application program download service, and the like.
After the scheme is adopted, a data frame corresponding to the service to be processed sent by the sending end can be received, wherein the data frame comprises the DMRS and the channel information of each effective subcarrier in the uplink channel, the position information of the DMRS is determined according to the preset processing rule, the position information of the DMRS and the channel response value corresponding to the position information except the position information of the DMRS are determined according to the preset channel estimation rule, finally, the compensation calibration is carried out on the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain the calibrated information, the service to be processed is realized according to the calibrated channel information, the number of symbols occupied by the DMRS is reduced by determining the position information of the DMRS according to the preset processing rule and multiplexing the existing DMRS reference signals as much as possible, and the resource occupancy rate of effective data is increased.
Based on the method of fig. 2, the present specification also provides some specific embodiments of the method, which are described below.
In addition, in another embodiment, after the service to be processed is implemented according to the calibrated channel information, a service processing success prompt may be generated and displayed.
In this embodiment, fig. 3 is an application schematic diagram of a service processing success prompt provided by the embodiment of the present invention, and as shown in fig. 3, in this embodiment, after the service processing to be processed is completed, a "service is completed! The word information prompts the user that the service to be processed is processed, so that the use experience of the user is improved.
Based on the same idea, an embodiment of this specification further provides a device corresponding to the foregoing method, and fig. 4 is a schematic structural diagram of a demodulation reference signal processing device provided in an embodiment of the present invention, as shown in fig. 4, the method may include:
a receiving module 401, configured to receive a data frame corresponding to a to-be-processed service sent by a sending end, where the data frame corresponding to the to-be-processed service includes a demodulation reference signal DMRS and channel information of each effective subcarrier in an uplink channel.
A processing module 402, configured to determine, according to a preset processing rule, location information of the DMRS.
In this embodiment, the processing module 402 is further configured to:
and determining the number of users contained in the sub data frames with preset time duration in the data frames according to the user identification.
And if the number of the users is one, determining the position information of the DMRS according to a first preset processing rule.
And if the number of the users is more than one, determining the position information of the DMRS according to a second preset processing rule.
Further, in an implementation manner, if the number of users is one, the processing module 402 is further configured to:
if the number of the users is one, and when the service corresponding to the (n 1) th user completes transmission in the sub data frame for the first time, when TTI (Num-request-n 1) <7 and (Num-request-n 1) =1, setting a DMRS in the first half frame of the sub data frame.
And when TTI (Num-request-n 1) ≥ 7 and (Num-request-n 1) =2, setting a DMRS in the second half frame of the sub data frame, wherein TTI is a user resource scheduling period, and (Num-request-n 1) represents the service request times of the (n 1) th user in the sub data frame with a preset time length.
In another implementation manner, if the number of users is greater than one, the processing module 402 is further configured to:
if the number of the users is greater than one, and when the TTI is not greater than a first preset threshold, setting an expression of the position of the DMRS as follows:
Km1n2；
where, TTI represents a user resource scheduling period, km1n2 represents the positions of OFDM in the m1 th row and the n2 th column in one sub data frame.
If the number of the users is greater than one, and when the TTI is greater than a first preset threshold and not greater than a second preset threshold, the position of the DMRS is as follows:
in the TTI, the first DMRS location is numbered Km2n3,
and when a service request of a second user comes in the sub-data frame, judging the relation between the sub-data frame and the sequence number of the first DMRS in the TTI.
And if the | B1-F1| is more than or equal to 3, the new DMRS is not required to be added to the service of the new user.
And if the | B1-F1| is less than 3, correspondingly adding a new DMRS for the service of the newly added user and setting the DMRS on Km2n 3.
Where Bn3 represents a sequence number of the OFDM symbol occupied by the nth 3 user starting in the time domain, fn3 represents a sequence number of the OFDM symbol occupied by the nth 3 user ending in the time domain, n3= |13-Bn3+1|/2, and m2 is any natural number from 0 to 11.
The processing module 402 is further configured to determine, according to a preset channel estimation rule, the position information of the DMRS and a channel response value corresponding to the position information except the position information of the DMRS.
In this embodiment, the processing module 402 is further configured to:
and determining a first channel response value corresponding to the position information of the DMRS according to a first channel estimation rule.
And determining a second channel response value corresponding to the position information except the position information of the DMRS according to an interpolation method.
The processing module 402 is further configured to perform compensation calibration on channel information of each effective subcarrier in the uplink channel according to the channel response value, obtain calibrated channel information, and implement the service to be processed according to the calibrated channel information.
In this embodiment, the processing module 402 is further configured to:
and performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the obtained first channel response value and the obtained second channel response value to obtain calibrated channel information.
The apparatus provided in the embodiment of the present invention may implement the method in the embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 5 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention, and as shown in fig. 5, a device 500 according to the embodiment includes: at least one processor 501 and memory 502. The processor 501 and the memory 502 are connected by a bus 503.
In a specific implementation, the at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that the at least one processor 501 executes the method in the above-described method embodiments.
For a specific implementation process of the processor 501, reference may be made to the above method embodiments, which implement the similar principle and technical effect, and this embodiment is not described herein again.
In the embodiment shown in fig. 5, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise high speed RAM memory and may also include non-volatile storage NVM, such as at least one disk memory.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer execution instruction is stored in the computer-readable storage medium, and when a processor executes the computer execution instruction, the demodulation reference signal processing method according to the above method embodiment is implemented.
An embodiment of the present invention further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the demodulation reference signal processing method as described above is implemented.
The computer-readable storage medium may be 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 disk. Readable storage media can be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary readable storage medium is coupled to the processor such the processor can read information from, and write information to, the readable storage medium. Of course, the readable storage medium may also be an integral part of the processor. The processor and the readable storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the readable storage medium may also reside as discrete components in the apparatus.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (7)

1. A demodulation reference signal processing method, comprising:
receiving a data frame corresponding to a to-be-processed service sent by a sending end, wherein the data frame corresponding to the to-be-processed service comprises a demodulation reference signal DMRS and channel information of each effective subcarrier in an uplink channel;
determining the position information of the DMRS according to a preset processing rule; determining the position information of the DMRS and a channel response value corresponding to the position information except the position information of the DMRS according to a preset channel estimation rule;
compensating and calibrating the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information, and realizing the service to be processed according to the calibrated channel information;
the determining the position information of the DMRS according to a preset processing rule comprises the following steps:
determining the number of users contained in a subdata frame with preset time duration in the data frame according to the user identification;
if the number of the users is one, determining the position information of the DMRS according to a first preset processing rule;
if the number of the users is one, determining the position information of the DMRS according to a first preset processing rule, including:
if the number of the users is one and the service corresponding to the (n 1) th user completes transmission in the sub data frame for the first time, when TTI (Num-request-n 1) <7 and (Num-request-n 1) =1, setting a DMRS in the first half frame of the sub data frame;
and when TTI (Num-request-n 1) ≥ 7 and (Num-request-n 1) =2, setting a DMRS in the latter half frame of the sub-data frame, wherein TTI is a user resource scheduling period, and (Num-request-n 1) represents the service request times of the (n 1) th user in the sub-data frame with a preset time length.
2. The method of claim 1, wherein the determining, according to a preset channel estimation rule, channel response values corresponding to the position information of the DMRS and position information other than the position information of the DMRS comprises:
determining a first channel response value corresponding to the position information of the DMRS according to a first channel estimation rule;
determining a second channel response value corresponding to the position information except the position information of the DMRS according to an interpolation method;
then, the performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information includes:
and performing compensation calibration on the channel information of each effective subcarrier in the uplink channel according to the obtained first channel response value and the obtained second channel response value to obtain calibrated channel information.
3. The method of claim 1, wherein if the number of users is greater than one, determining the location information of the DMRS according to a second preset processing rule comprises:
if the number of the users is greater than one, and when the TTI is not greater than a first preset threshold, setting an expression of the position of the DMRS as follows:
Km1n2；
wherein, TTI represents a user resource scheduling period, km1n2 represents the position of OFDM in the m1 th row and the n2 th column in one sub data frame.
4. The method of claim 3, further comprising:
if the number of the users is greater than one, and when the TTI is greater than a first preset threshold and not greater than a second preset threshold, the position of the DMRS is as follows:
in the TTI, the first DMRS location is numbered Km2n3,
when a service request of a second user comes in a sub-data frame, judging the relation between the sub-data frame and the sequence number of the first DMRS in the TTI;
if the absolute value of B1-F1 is more than or equal to 3, the new DMRS is not needed to be added to the service of the new user;
if the | B1-F1| is less than 3, a new DMRS is required to be correspondingly added to the service of the newly added user and is arranged on the Km2n 3;
where Bn3 represents a sequence number of an OFDM in the time domain, where the OFDM starts in the time domain, where the nth 3 user occupies the OFDM, where Fn3 represents a sequence number of an OFDM in the time domain, where the OFDM occupies the nth 3 user ends in the time domain, n3= |13-Bn3+1|/2, and m2 is any natural number from 0 to 11.
5. A demodulation reference signal processing apparatus, comprising:
the receiving module is used for receiving a data frame corresponding to a to-be-processed service sent by a sending end, wherein the data frame corresponding to the to-be-processed service comprises a demodulation reference signal DMRS and channel information of each effective subcarrier in an uplink channel;
the processing module is used for determining the position information of the DMRS according to a preset processing rule; the processing module is further configured to determine, according to a preset channel estimation rule, the position information of the DMRS and a channel response value corresponding to the position information other than the position information of the DMRS;
the processing module is further configured to perform compensation calibration on channel information of each effective subcarrier in the uplink channel according to the channel response value to obtain calibrated channel information, and implement the service to be processed according to the calibrated channel information;
the processing module is specifically configured to:
determining the number of users contained in a subdata frame with preset time duration in the data frame according to the user identification;
if the number of the users is one, determining the position information of the DMRS according to a first preset processing rule;
if the number of the users is one, determining the position information of the DMRS according to a first preset processing rule, including:
if the number of the users is one and the transmission of the service corresponding to the (n 1) th user is completed for the first time in the sub-data frame, when TTI (Num-request-n 1) <7 and (Num-request-n 1) =1, setting a DMRS in the first half frame of the sub-data frame;
and when TTI (Num-request-n 1) ≥ 7 and (Num-request-n 1) =2, setting a DMRS in the second half frame of the sub data frame, wherein TTI is a user resource scheduling period, and (Num-request-n 1) represents the service request times of the (n 1) th user in the sub data frame with a preset time length.
6. An electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the demodulation reference signal processing method of any one of claims 1 to 4.
7. A computer-readable storage medium having stored therein computer-executable instructions that, when executed by a processor, implement the demodulation reference signal processing method according to any one of claims 1 to 4.
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