CN116208461A - Parameter estimation method, device, electronic equipment and readable storage medium - Google Patents

Parameter estimation method, device, electronic equipment and readable storage medium Download PDF

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CN116208461A
CN116208461A CN202310492960.3A CN202310492960A CN116208461A CN 116208461 A CN116208461 A CN 116208461A CN 202310492960 A CN202310492960 A CN 202310492960A CN 116208461 A CN116208461 A CN 116208461A
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ofdm symbol
symbol
target
symbols
reference signal
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CN116208461B (en
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曾鹏飞
范越
薛妹
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Shanghai Xingsi Semiconductor Co ltd
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Shanghai Xingsi Semiconductor Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking

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  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a parameter estimation method, a device, electronic equipment and a readable storage medium, wherein the method comprises the steps of splicing a plurality of reference symbols corresponding to the same reference signal to obtain a target Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to an original OFDM symbol, and the original OFDM symbol is an OFDM symbol corresponding to the reference symbol of the reference signal before splicing; and carrying out parameter estimation according to the reference symbol in the target OFDM symbol. The parameter estimation method provided by the embodiment of the invention improves the accuracy of estimating the channel related parameters based on the OFDM symbols in the CRS ports.

Description

Parameter estimation method, device, electronic equipment and readable storage medium
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a parameter estimation method, a device, an electronic apparatus, and a readable storage medium.
Background
The bandwidth of the reference signal is the bandwidth between the reference symbol located at the highest frequency domain position and the reference symbol located at the lowest frequency domain position in an orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol with reference symbols (which may also be referred to as pilots) in the ports of the reference signal, such as the cell-level reference signal (Cell Reference Signal, CRS).
Currently, in long term evolution (Long Term Evolution, LTE), the accuracy of channel-related parameters estimated based on OFDM symbols in CRS ports is low.
Disclosure of Invention
The embodiment of the application provides a parameter estimation method, a device, electronic equipment and a readable storage medium, which improve the accuracy of estimating channel related parameters based on OFDM symbols in a CRS port.
To achieve the above object, in a first aspect, an embodiment of the present application provides a parameter estimation method, including:
splicing a plurality of reference symbols corresponding to the same reference signal to obtain a target Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to an original OFDM symbol, and the original OFDM symbol is an OFDM symbol corresponding to the reference symbol of the reference signal before splicing;
and carrying out parameter estimation according to the reference symbol in the target OFDM symbol.
In a second aspect, an embodiment of the present application provides a parameter estimation apparatus, including:
the acquisition module is used for splicing a plurality of reference symbols corresponding to the same reference signal to obtain a target Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to an original OFDM symbol, and the original OFDM symbol is an OFDM symbol corresponding to the reference symbol of the reference signal before splicing;
and the estimation module is used for carrying out parameter estimation according to the reference symbol in the target OFDM symbol.
In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, and a computer program stored on the memory and executable on the processor, the computer program implementing the steps in the parameter estimation method according to the first aspect when executed by the processor.
In a fourth aspect, embodiments of the present application provide a readable storage medium having a program stored thereon, which when executed by a processor, implements the steps in the parameter estimation method according to the first aspect.
In the embodiment of the present application, a target OFDM symbol is obtained by splicing a plurality of reference symbols corresponding to the same reference signal, so that the bandwidth of the reference signal corresponding to the target OFDM symbol is greater than the bandwidth of the reference signal corresponding to the original OFDM symbol, thereby improving the accuracy of parameters (such as channel related parameters) determined according to the target OFDM symbol.
Drawings
For a clearer description of the technical solutions in the embodiments of the present application, the following description will be given with reference to the accompanying drawings, which are only embodiments of the present application, and it is obvious to those skilled in the art that other drawings can be obtained from the listed drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a network system applicable to an embodiment of the present application;
fig. 2 is a flow chart of a parameter estimation method according to an embodiment of the present application;
fig. 3 is a schematic diagram of the locations of reference symbols in CRS ports;
FIG. 4 is one of schematic diagrams of a splice reference OFDM symbol;
FIG. 5 is a second schematic diagram of a splice reference OFDM symbol;
fig. 6 is a schematic structural diagram of a parameter estimation device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the inventors, are within the scope of the present application, based on the embodiments herein.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
Embodiments of the present application are described below with reference to the accompanying drawings. The parameter estimation method, the parameter estimation device, the electronic equipment and the readable storage medium provided by the embodiment of the application can be applied to a wireless communication system. The wireless communication system may be a system employing a fifth generation (5th Generation,5G) mobile communication technology (hereinafter, simply referred to as a 5G system), and it will be understood by those skilled in the art that the 5G system is merely an example and not a limitation.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a network system applicable to an embodiment of the present application, and as shown in fig. 1, includes a transmitting device 11 and a receiving device 12. Communication is possible between the transmitting device 11 and the receiving device 12.
The transmitting Device 11 may be a terminal, which may also be referred to as a User Equipment (UE), and in practical applications, the terminal may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer), a personal digital assistant (Personal Digital Assistant, PDA), a mobile internet Device (Mobile Internet Device, MID), a Wearable Device, or a vehicle-mounted Device. The transmitting device 11 may also be a network-side device, which may be a base station, an access point, or other network elements. Similarly, the receiving device 12 may be a terminal or a network device.
The parameter estimation method provided in the embodiment of the present application is described below.
Referring to fig. 2, fig. 2 is a flow chart of a parameter estimation method provided in an embodiment of the present application. The parameter estimation method shown in fig. 2 may be performed by the receiving apparatus 12.
As shown in fig. 2, the parameter estimation method may include the steps of:
step 101, splicing a plurality of reference symbols corresponding to the same reference signal to obtain a target Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to an original OFDM symbol, and the original OFDM symbol is an OFDM symbol corresponding to the reference symbol of the reference signal before splicing.
It should be understood that the original OFDM symbol refers to an OFDM symbol in which a reference symbol is provided in the reference signal that is not spliced.
In specific implementation, the receiving device receives a signal sent by the sending device, and splices a plurality of reference symbols corresponding to the same reference signal in the received signal to obtain at least one target OFDM symbol. The reference signal may be a cell-level reference signal (Cell Reference Signal, CRS).
Referring to fig. 3, fig. 3 is a schematic diagram of the positions of reference symbols in CRS ports. The reference symbols may also be referred to as pilots. Fig. 3 shows the positions of reference symbols in CRS ports in the case of three numbers of antenna ports 1, 2, 4.
In fig. 3, one large resource grid corresponds to one CRS port (one large resource grid corresponds to one antenna port), and in fig. 3, 7 large resource grids respectively correspond to 7 CRS ports. One small square in each large Resource grid corresponds to one Resource Element (RE), a total of 12 small squares in a column in the frequency domain direction corresponds to one OFDM symbol, and each Resource grid corresponds to 14 OFDM symbols in fig. 3. Index of each OFDM symbollIn the order of 0, 1 and 1 …13。
In the presence of 1 antenna port, reference symbol R 0 Can be respectively arranged at the indexlOf the OFDM symbols of 0, 4, 7, 11, i.e. the original OFDM symbol is the indexlOFDM symbols of 0, 4, 7, 11. Two reference symbols R may be provided in each original OFDM symbol as shown in fig. 3 0 。
In the case where there are 2 antenna ports, reference symbol R in antenna port 0 0 And reference symbol R in antenna port 1 1 Can be respectively arranged at the indexlOf the OFDM symbols of 0, 4, 7, 11, i.e. the original OFDM symbols in antenna port 0 and antenna port 1 are both indexeslOFDM symbols of 0, 4, 7, 11. Two reference symbols R may be provided in each original OFDM symbol as shown in fig. 3 0 /R 1 。
In the case where there are 4 antenna ports, reference symbol R in antenna port 0 0 And reference symbol R in antenna port 1 1 Can be respectively arranged at the indexlOf the OFDM symbols of 0, 4, 7, 11, i.e. the original OFDM symbols in antenna port 0 and antenna port 1 are indexedlOFDM symbols of 0, 4, 7, 11. Reference symbol R in antenna port 2 2 And reference symbol R in antenna port 3 3 Can be respectively arranged at the indexlOf the OFDM symbols 1, 8, i.e. the original OFDM symbol in antenna port 2 and antenna port 3 is the indexlOFDM symbols of 1, 8. Two reference symbols R may be provided in each original OFDM symbol as shown in fig. 3 0 /R 1 /R 2 /R 3 。
It should be noted that, the schematic diagrams of the positions of the reference symbols in the CRS ports shown in fig. 3 are only examples, and are not limiting. For example, in other examples, each resource grid may correspond to 12 OFDM symbols, and for example, in other examples, the setting of the locations of the reference symbols (e.g., the index of the OFDM symbol to which the reference symbol is set is different from the example of fig. 3, the number of reference symbols set in the OFDM symbol, and the location in the OFDM symbol is different from the example of fig. 3) is different from the setting in fig. 3.
The above-mentioned splicing the multiple reference symbols corresponding to the same reference signal refers to that the reference symbols in CRS ports are spliced by taking a single CRS port as a unit (each CRS port corresponds to one reference signal), and when there are multiple (e.g. 4) CRS ports (antenna ports), the reference symbols of each CRS port in the multiple CRS ports are spliced independently. Taking the example that there are 4 CRS ports, the reference symbols in antenna port 0/antenna port 1/antenna port 2/antenna port 3 may be mutually spliced, but the reference symbol in antenna port 0 and the reference symbol in antenna port 1 may not be mutually spliced, and the reference symbol in antenna port 1 and the reference symbol in antenna port 3 may not be mutually spliced … … are not listed here.
The concatenation of multiple reference symbols to obtain at least one target OFDM symbol is described below in two examples.
For example, referring to fig. 4, fig. 4 is one of schematic diagrams of the splice reference symbol. As shown in fig. 4, indexlIs 0 and indexlSplice all reference symbols in the OFDM symbol of 4 and indexlFor 7 and indexlAll reference symbols in the two OFDM symbols of 11 are spliced to obtain two target OFDM symbols (OFDM symbols in the dashed box).
For example, please refer to fig. 5, fig. 5 is a diagram illustrating a splice reference symbol. As shown in fig. 5, indexlIs 0, indexlIs 4, indexlFor 7 and indexlAll reference symbols in the four original OFDM symbols of 11 are spliced to obtain a target OFDM symbol (OFDM symbol in the dashed box).
The bandwidth of the reference signal is the bandwidth between the reference symbol located at the highest frequency domain position and the reference symbol located at the lowest frequency domain position in the OFDM symbol with the reference symbol in the CRS port, and as can be seen from the examples shown in fig. 4 and fig. 5, the bandwidth of the reference signal corresponding to the target OFDM symbol obtained by splicing (the reference signal located on the right side, i.e. the reference signal after the reference symbol is spliced) is greater than the bandwidth of the reference signal corresponding to the original OFDM symbol (the reference signal located on the left side, i.e. the reference signal corresponding to the original OFDM symbol is not spliced by the reference symbol).
And 102, performing parameter estimation according to the reference symbol in the target OFDM symbol.
The parameter estimation includes an estimation of channel related parameters. There are many channel related parameters and no limitation is made here. In an alternative embodiment, the target parameter includes at least one of a time domain resolution, a time delay parameter, and a channel correlation. The time domain resolution is one-half the bandwidth of the reference signal. The step 102 includes: and estimating at least one of time resolution, time delay parameters and channel correlation according to the reference symbol in the target OFDM symbol.
In LTE, channel-related parameters may be estimated based on OFDM symbols in CRS ports, such as time resolution, delay parameters, and channel correlation based on target OFDM symbols in CRS ports.
In the embodiment of the present application, a target OFDM symbol is obtained by splicing a plurality of reference symbols corresponding to the same reference signal, so that the bandwidth of the reference signal corresponding to the target OFDM symbol is greater than the bandwidth of the reference signal corresponding to the original OFDM symbol, thereby improving the accuracy of parameters (such as channel related parameters) determined according to the target OFDM symbol.
Specifically, in the related art, when the time resolution is estimated based on the CRS, the estimated time resolution is small. However, by adopting the parameter estimation method provided by the embodiment of the application, the target OFDM symbol is obtained by splicing the plurality of reference symbols corresponding to the same reference signal, so that the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to the original OFDM symbol, and the time domain resolution is one-half of that of the reference signal, thereby increasing the estimated time domain resolution.
In the related art, when the delay parameter is estimated based on the CRS, the estimation range of the delay parameter is narrower. However, by adopting the parameter estimation method provided by the embodiment of the application, the plurality of reference symbols corresponding to the same reference signal are spliced to obtain at least one target OFDM symbol, so that the reference symbols in the target OFDM symbol can be arranged more densely, and the estimation range of the time delay parameter is widened.
In the related art, when channel correlation is estimated based on the CRS, the accuracy of the estimated channel correlation is low. However, by adopting the parameter estimation method provided by the embodiment of the application, the plurality of reference symbols corresponding to the same reference signal are spliced to obtain at least one target OFDM symbol, so that the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to the original OFDM symbol, and the accuracy of the estimated channel correlation can be improved.
In an alternative embodiment, the step 102 includes:
determining a channel estimation value according to the reference symbol in the target OFDM symbol;
and determining at least one of a time delay parameter and channel correlation according to the channel estimation value.
For example, if a reference symbol is set in an original OFDM symbol in a signal sent by a sending device, and a specific value of the reference symbol is set to be 6, after the signal is sent out, the signal arrives at a receiving device through transmission, the receiving device determines that the specific value of the reference symbol is 3, which indicates that the signal is reduced by one time in the transmission process, and according to the specific values before and after the transmission of the reference symbol, a channel estimation value can be determined, where the channel estimation value is used to characterize the distortion degree of the signal by the channel.
It should be appreciated that in determining the channel estimate, the channel estimate may be determined based on one or more reference symbols in the target OFDM symbol, and that in determining the channel estimate based on all of the reference symbols in the target OFDM symbol, a more accurate channel estimate may be determined based on variations in all of the reference symbols.
And performing inverse Fourier transform according to the determined channel estimation value to obtain a time delay parameter.
And performing inverse Fourier transform twice according to the determined channel estimation value, so as to obtain the channel correlation.
There are many ways to determine the delay parameter and the channel correlation according to the reference symbol in the target OFDM symbol, but the method provided by this embodiment is used to determine the delay parameter and the channel correlation, so the process is simpler, and the calculation amount is smaller.
As described above, there are many ways of concatenating multiple reference symbols corresponding to the same reference signal to obtain at least one target OFDM symbol, and there may be multiple concatenation ways besides the ways of the first example and the second example. For example, when there are 4 original OFDM symbols in CRS ports (e.g., when there are 1 antenna port in fig. 3), the index is to be obtainedlAll reference symbols in the original OFDM symbols 1, 4 and 11 are spliced to obtain a target OFDM symbol; or indexlAll reference symbols in the original OFDM symbols of 4 and 7 are spliced to obtain a target OFDM symbol, and indexes are obtainedlAll reference symbols in the original OFDM symbols which are 0 and 11 are spliced to obtain a target OFDM symbol.
For another example, when there are 5 original OFDM symbols in the CRS ports, all or part of the reference symbols in any two of the 5 original OFDM symbols are spliced to obtain the target OFDM symbol, and all or part of the reference symbols in the remaining three original OFDM symbols are spliced to obtain the target OFDM symbol.
In case there are an even number of original OFDM symbols in the CRS ports, in an alternative embodiment, the step 101 includes:
and splicing all reference symbols in every two original OFDM symbols in the N original OFDM symbols to obtain M target OFDM symbols, wherein M is an integer greater than or equal to 1, and M is one half of N.
Referring to fig. 5, if the stitching of the reference symbols in every two original OFDM symbols is not limited, the reference symbols in the target OFDM symbol obtained after stitching all the reference symbols in the 4 original OFDM symbols are densely arranged, and the distribution of the reference symbols is less reasonable.
However, in this embodiment, the distribution of the reference symbols in the target OFDM symbol may be made more reasonable by stitching all the reference symbols in every two original OFDM symbols in the original OFDM symbol (as shown in fig. 4).
Optionally, the splicing all reference symbols in every two original OFDM symbols in the N original OFDM symbols includes:
and splicing all reference symbols in two adjacent original OFDM symbols in the N original OFDM symbols.
In particular, the adjacent fingers are adjacent in the time domain. Taking fig. 4 as an example, in fig. 4, the indexlTwo original OFDM symbols of 0 and 4 are adjacent and indexedlTwo original OFDM symbols, 7 and 11, are adjacent. Thus, the index can belAll reference symbols in the two original OFDM symbols which are 0 and 4 are spliced to obtain a target OFDM symbol, and indexes are obtainedlAll reference symbols in the two original OFDM symbols of 7 and 11 are spliced to obtain a target OFDM symbol.
Because the two original OFDM symbols corresponding to the spliced reference symbol are adjacent in the time domain, the target OFDM symbol can be considered to be substantially unchanged in the time domain from the two original OFDM symbols spliced into the target OFDM symbol, thereby facilitating subsequent analysis processing.
In an alternative embodiment, the step 101 includes:
splicing a plurality of reference symbols in an original OFDM symbol positioned in a first time slot to obtain the target OFDM symbol, wherein the first time slot is any time slot corresponding to the reference signal, and the target OFDM symbol is positioned in the first time slot;
or, splicing a plurality of reference symbols in an original OFDM symbol positioned in the first time slot with a plurality of reference symbols in an original OFDM symbol positioned in a second time slot, so as to obtain the target OFDM symbol, wherein the second time slot is any time slot corresponding to the reference signal except the first time slot, and the target OFDM symbol is positioned in the first time slot or the second time slot.
For example, referring to fig. 4, the reference signal shown in fig. 4 has two slots (slot 1 and slot 2), and the first slot may be any one of the two slots. As shown in fig. 4, all reference symbols in the two original OFDM symbols in the slot 1 may be spliced to obtain a target OFDM symbol also located in the slot 1. All reference symbols in the two original OFDM symbols in slot 2 may also be concatenated to obtain the target OFDM symbol also located in slot 2.
In the first example, because the two original OFDM symbols that are spliced are located in the same slot, and the target OFDM symbol obtained by the splicing is also located in the same slot as the two original OFDM symbols, the target OFDM symbol can be considered to have no change in the time domain compared with the two original OFDM symbols that are spliced as the target OFDM symbol, so that the subsequent analysis and processing can be facilitated, and the splicing is also facilitated.
For example, referring to fig. 5, the reference signals shown in fig. 5 share two slots (slot 3 and slot 4), and all the reference symbols in the 4 original OFDM symbols in the slot 3 and the slot 4 may be spliced to obtain a target OFDM symbol, where the target OFDM symbol is located in the slot 3 as shown in fig. 5. In practice, the target OFDM symbol may also be located in slot 4.
In the second example, the reference symbols in the two slots are spliced, so that the arrangement of the reference symbols in the target OFDM symbol obtained after the splicing is denser, and the estimation range of the delay parameter is further widened.
In an alternative embodiment, the frequency domain offset between the corresponding two reference symbols in any two adjacent original OFDM symbols in the first slot is equal to one half of the frequency domain offset between any two adjacent reference symbols in any one original OFDM symbol in the first slot, and the step 101 includes:
and horizontally moving all reference symbols on a plurality of original OFDM symbols positioned in a first time slot to a first time domain position, wherein the first time domain position is positioned in the first time slot, and the first time slot is any time slot corresponding to the reference signal.
Still taking fig. 4 as an example, indexlBoth original OFDM symbols 0 and 4 are in slot 1, indexlReference symbol located at the lowest frequency domain position in the original OFDM symbol of 0, and indexlThe reference symbol located at the lowest frequency domain position in the original OFDM symbol of 4 corresponds to the reference symbol; original with index l of 0The reference symbol located at the highest frequency domain position in the OFDM symbol corresponds to the reference symbol located at the highest frequency domain position in the original OFDM symbol with index l of 4.
IndexlReference symbols located in the lowest frequency domain position in the original OFDM symbol of 0, compared to the indexlThe frequency domain offset of the reference symbol located at the lowest frequency domain position in the original OFDM symbol of 4 is equal to the indexlOriginal OFDM symbol (or index) of 0lOriginal OFDM symbol of 4) is one half of the frequency domain offset between two adjacent reference symbols.
Index aslAll reference symbols in the original OFDM symbol of 4 are horizontally shifted to indexlAnd obtaining the target OFDM symbol for the first time domain position corresponding to 0.
In this embodiment, in the case where the frequency domain offset between the corresponding two reference symbols in any two adjacent original OFDM symbols located in the first slot is equal to one half of the frequency domain offset between any two adjacent reference symbols in any one original OFDM symbol in the first slot, by horizontally moving all reference symbols located on a plurality of original OFDM symbols in the first slot to the first time domain position, the spacing between all reference symbols on the target OFDM symbol can be made uniform, so that the channel estimation value can be determined based on equidistant sampling, and the accuracy of determining the channel estimation value can be improved based on equidistant sampling. In addition, the splicing process can be simplified by horizontally moving to splice, so that the efficiency of obtaining the target OFDM symbol is improved.
In an alternative embodiment, the spacing between any two adjacent reference symbols in the target OFDM symbol is equal.
When the method is specifically implemented, when a plurality of reference symbols corresponding to the same reference signal are spliced, a proper splicing mode is adopted, so that the distances between any two adjacent reference symbols in the obtained target OFDM symbol are equal. In this way, the intervals between all the reference symbols on the target OFDM symbol can be uniform, so that the channel estimation value can be determined based on equidistant samples, and the accuracy of determining the channel estimation value can be improved.
In an alternative embodiment, the time domain position of the target OFDM symbol is the time domain position of any one OFDM symbol in the reference signal.
In specific implementation, the time domain position of the target OFDM symbol obtained after the splicing may be the time domain position of any one OFDM symbol in the CRS port.
Still taking fig. 4 as an example, indexlAll reference symbols in the two original OFDM symbols of 0 and 4 are spliced, and the obtained time domain position of the target OFDM symbol can be indexed as shown in figure 4lThe time domain position of the OFDM symbol with 0 is the same as that of the indexlThe time domain positions of the OFDM symbols are the same for any one of 1 to 13.
In an alternative embodiment, the time domain position of the target OFDM symbol is the same as the time domain position of any one of the original OFDM symbols;
alternatively, the time domain position of the target OFDM symbol is the time domain position of the OFDM symbol between any two of the original OFDM symbols.
For example, still referring to fig. 4, if the index is to belAll reference symbols in the two original OFDM symbols which are 0 and 4 are spliced, and the time domain position of the obtained target OFDM symbol can be matched with an indexlThe time domain position of the OFDM symbol of 0 is the same, or is the same as the indexlThe time domain positions of the OFDM symbols of 4 are identical.
Alternatively, if an index is to be madelAll reference symbols in the two original OFDM symbols which are 0 and 4 are spliced, and the obtained time domain position of the target OFDM symbol can be matched with an indexlTime domain position of OFDM symbol of 1 is the same or same as indexlThe time domain position of the OFDM symbol of 2 is the same, or is the same as the indexlThe time domain positions of the OFDM symbols of 3 are the same.
In this embodiment, by the above definition, the target OFDM symbol can be made substantially unchanged in the time domain from the original OFDM symbol, so that the subsequent analysis processing can be facilitated.
In an alternative embodiment, the number of reference symbols in the original OFDM symbol is the same;
and/or, the spacing between any two adjacent reference symbols in the original OFDM symbol is the same.
In particular, the number of reference symbols in the original OFDM symbol is the same, for example 2,
in this embodiment, by making the number of reference symbols in the original OFDM symbol the same, the setting of the reference symbols can be facilitated. Equidistant sampling can be realized by making the spacing between any adjacent two reference symbols in the original OFDM symbol identical, so that more accurate parameters can be conveniently estimated.
Referring to fig. 6, the embodiment of the present application further provides a parameter estimation apparatus 200, including:
an obtaining module 201, configured to splice multiple reference symbols corresponding to the same reference signal to obtain a target orthogonal frequency division multiplexing OFDM symbol, where a bandwidth of a reference signal corresponding to the target OFDM symbol is greater than a bandwidth of a reference signal corresponding to an original OFDM symbol, where the original OFDM symbol is an OFDM symbol corresponding to a reference symbol of the reference signal before splicing;
an estimation module 202 is configured to perform parameter estimation according to the reference symbol in the target OFDM symbol.
Optionally, the estimation module 202 includes:
and estimating at least one of time resolution, time delay parameters and channel correlation according to the reference symbol in the target OFDM symbol.
Optionally, the estimation module 202 includes:
determining a channel estimation value according to the reference symbol in the target OFDM symbol;
and determining at least one of a time delay parameter and channel correlation according to the channel estimation value.
Optionally, the obtaining module 201 includes:
splicing a plurality of reference symbols in an original OFDM symbol positioned in a first time slot to obtain the target OFDM symbol, wherein the first time slot is any time slot corresponding to the reference signal, and the target OFDM symbol is positioned in the first time slot;
or, splicing a plurality of reference symbols in an original OFDM symbol positioned in the first time slot with a plurality of reference symbols in an original OFDM symbol positioned in a second time slot, so as to obtain the target OFDM symbol, wherein the second time slot is any time slot corresponding to the reference signal except the first time slot, and the target OFDM symbol is positioned in the first time slot or the second time slot.
Optionally, the obtaining module 201 includes:
and horizontally moving all reference symbols on a plurality of original OFDM symbols positioned in a first time slot to a first time domain position, wherein the first time domain position is positioned in the first time slot, and the first time slot is any time slot corresponding to the reference signal.
Optionally, the spacing between any two adjacent reference symbols in the target OFDM symbol is equal.
Optionally, the time domain position of the target OFDM symbol is the same as the time domain position of any one of the original OFDM symbols;
and/or the number of the groups of groups,
the reference signals include cell-level reference signals CRS.
The parameter estimation device 200 provided in the embodiment of the present application can implement each process that can be implemented in the embodiment of the parameter estimation method of the present application, and achieve the same beneficial effects, so that repetition is avoided, and no description is repeated here.
The embodiment of the application provides electronic equipment. As shown in fig. 7, the electronic device 300 includes: a processor 301, a memory 302 and a computer program stored on and executable on said memory 302, the various components in the electronic device 300 being coupled together by a bus system 303. It is understood that the bus system 303 is used to enable connected communication between these components.
Wherein the processor 301 is configured to:
splicing a plurality of reference symbols corresponding to the same reference signal to obtain a target Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to an original OFDM symbol, and the original OFDM symbol is an OFDM symbol corresponding to the reference symbol of the reference signal before splicing;
and carrying out parameter estimation according to the reference symbol in the target OFDM symbol.
Optionally, the processor 301 is further configured to:
and estimating at least one of time resolution, time delay parameters and channel correlation according to the reference symbol in the target OFDM symbol.
Optionally, the processor 301 is further configured to:
determining a channel estimation value according to the reference symbol in the target OFDM symbol;
and determining at least one of a time delay parameter and channel correlation according to the channel estimation value.
Optionally, the processor 301 is further configured to:
splicing a plurality of reference symbols in an original OFDM symbol positioned in a first time slot to obtain the target OFDM symbol, wherein the first time slot is any time slot corresponding to the reference signal, and the target OFDM symbol is positioned in the first time slot;
or, splicing a plurality of reference symbols in an original OFDM symbol positioned in the first time slot with a plurality of reference symbols in an original OFDM symbol positioned in a second time slot, so as to obtain the target OFDM symbol, wherein the second time slot is any time slot corresponding to the reference signal except the first time slot, and the target OFDM symbol is positioned in the first time slot or the second time slot.
Optionally, the processor 301 is further configured to:
and horizontally moving all reference symbols on a plurality of original OFDM symbols positioned in a first time slot to a first time domain position, wherein the first time domain position is positioned in the first time slot, and the first time slot is any time slot corresponding to the reference signal.
Optionally, the spacing between any two adjacent reference symbols in the target OFDM symbol is equal.
Optionally, the time domain position of the target OFDM symbol is the same as the time domain position of any one of the original OFDM symbols;
and/or the number of the groups of groups,
the reference signals include cell-level reference signals CRS.
The electronic device 300 provided in this embodiment of the present application can implement each process that can be implemented in the embodiment of the parameter estimation method corresponding to fig. 2, and achieve the same beneficial effects, so that repetition is avoided, and no further description is given here.
The embodiment of the present application further provides a computer readable storage medium, on which a computer program is stored, where the computer program when executed by a processor implements each process of the above-mentioned parameter estimation method embodiment, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims (10)

1. A method of parameter estimation, comprising:
splicing a plurality of reference symbols corresponding to the same reference signal to obtain a target Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to an original OFDM symbol, and the original OFDM symbol is an OFDM symbol corresponding to the reference symbol of the reference signal before splicing;
and carrying out parameter estimation according to the reference symbol in the target OFDM symbol.
2. The method of claim 1, wherein said performing parameter estimation from reference symbols in said target OFDM symbol comprises:
and estimating at least one of time resolution, time delay parameters and channel correlation according to the reference symbol in the target OFDM symbol.
3. The method of claim 1, wherein said performing parameter estimation from reference symbols in said target OFDM symbol comprises:
determining a channel estimation value according to the reference symbol in the target OFDM symbol;
and determining at least one of a time delay parameter and channel correlation according to the channel estimation value.
4. The method of claim 1, wherein the splicing the plurality of reference symbols corresponding to the same reference signal to obtain the target OFDM symbol includes:
splicing a plurality of reference symbols in an original OFDM symbol positioned in a first time slot to obtain the target OFDM symbol, wherein the first time slot is any time slot corresponding to the reference signal, and the target OFDM symbol is positioned in the first time slot;
or, splicing a plurality of reference symbols in an original OFDM symbol positioned in the first time slot with a plurality of reference symbols in an original OFDM symbol positioned in a second time slot, so as to obtain the target OFDM symbol, wherein the second time slot is any time slot corresponding to the reference signal except the first time slot, and the target OFDM symbol is positioned in the first time slot or the second time slot.
5. The method of claim 1, wherein the splicing the plurality of reference symbols corresponding to the same reference signal to obtain the target OFDM symbol includes:
and horizontally moving all reference symbols on a plurality of original OFDM symbols positioned in a first time slot to a first time domain position, wherein the first time domain position is positioned in the first time slot, and the first time slot is any time slot corresponding to the reference signal.
6. The method of claim 4, wherein a spacing between any adjacent two reference symbols in the target OFDM symbol is equal.
7. The method according to any one of claims 1 to 6, wherein the time domain position of the target OFDM symbol is the same as the time domain position of any one of the original OFDM symbols;
and/or the number of the groups of groups,
the reference signals include cell-level reference signals CRS.
8. A parameter estimation apparatus, comprising:
the acquisition module is used for splicing a plurality of reference symbols corresponding to the same reference signal to obtain a target Orthogonal Frequency Division Multiplexing (OFDM) symbol, wherein the bandwidth of the reference signal corresponding to the target OFDM symbol is larger than that of the reference signal corresponding to an original OFDM symbol, and the original OFDM symbol is an OFDM symbol corresponding to the reference symbol of the reference signal before splicing;
and the estimation module is used for carrying out parameter estimation according to the reference symbol in the target OFDM symbol.
9. An electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the parameter estimation method according to any one of claims 1 to 7.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a program which, when executed by a processor, implements the steps in the parameter estimation method according to any one of claims 1 to 7.
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