CN109150210B - Signal processing method and device, electronic equipment and computer readable storage medium - Google Patents

Signal processing method and device, electronic equipment and computer readable storage medium Download PDF

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CN109150210B
CN109150210B CN201710453454.8A CN201710453454A CN109150210B CN 109150210 B CN109150210 B CN 109150210B CN 201710453454 A CN201710453454 A CN 201710453454A CN 109150210 B CN109150210 B CN 109150210B
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frequency band
port
subcarrier
target
channel estimation
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CN109150210A (en
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李辉
高秋彬
塔玛拉卡·拉盖施
陈润华
苏昕
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements

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

Abstract

The invention provides a signal processing method, a signal processing device, electronic equipment and a computer readable storage medium, relates to the technical field of communication, and aims to ensure the performance of phase noise compensation. The signal processing method of the present invention includes: determining a frequency band number mode of a scheduling bandwidth allocated to a user; if the frequency band number mode is a low frequency band number mode, sequentially mapping PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in one or more PT-RS ports of the sending end; and transmitting the PT-RS signal according to the mapping result. The invention can ensure the performance of phase noise compensation.

Description

Signal processing method and device, electronic equipment and computer readable storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal processing method and apparatus, an electronic device, and a computer-readable storage medium.
Background
The phase noise comes from local oscillators in the transmitter and the receiver, which will affect the transmission of the multi-carrier signal. In the high frequency band (above 6 GHz), the influence of phase noise will be more serious, and the phase noise compensation needs to be performed on the received signal to ensure the system performance. By introducing the phase tracking reference signal into the transmitting end, the phase change caused by the phase noise can be tracked, the receiving end can be ensured to carry out phase noise estimation of a link, and the influence of the phase noise is compensated.
In an NR (New Radio, New air interface) system, a phase tracking reference signal (PT-RS) is transmitted within a user-scheduled frequency band, and a phase tracking reference signal (PT-RS) is transmitted within a user-scheduled frequency band. The frequency domain density is related to the scheduling bandwidth of the user, and the number of the sub-carriers occupied by the PT-RS in the bandwidth can be determined according to the scheduling bandwidth.
The scheduling bandwidth of the user is determined by the system based on the channel characteristics between the user and the base station. Under different channel characteristics, the scheduling bandwidth allocated to the user by the system may be continuous in the frequency domain or discrete in the frequency domain.
However, if the scheduling bandwidth is frequency-domain discrete, PT-RS configuration is performed sequentially for every 2 or 4 PRBs, and then there may be no PT-RS distribution on some discrete scheduling frequency bands. As shown in fig. 1, it is assumed that the full scheduling bandwidth of a user is divided into 4 discontinuous bands. And if the PT-RS frequency domain density of each 4 PRBs is adopted and mapped in sequence, no PT-RS distribution exists on the 2 nd and 3 rd frequency bands. If the frequency domain spacing of these 4 partial bands is far apart, the phase noise characteristics in bands 1 and 4 may be different from the phase noise characteristics in bands 2 and 3. Such a configuration of the PT-RS will not enable the phase noise characteristics in the bands 2, 3 to be obtained, affecting the performance of phase noise compensation.
Disclosure of Invention
In view of the foregoing, the present invention provides a signal processing method, a signal processing apparatus, an electronic device and a computer-readable storage medium, which are used to ensure the performance of phase noise compensation.
In order to solve the technical problem, the invention provides a signal processing method, which is applied to a sending end, wherein the sending end is provided with one or more phase tracking reference signal PT-RS ports; the method comprises the following steps:
determining a frequency band number mode of a scheduling bandwidth allocated to a user;
if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in the one or more PT-RS ports;
and transmitting the PT-RS signal according to the mapping result.
Wherein the step of determining the frequency band number mode of the scheduling bandwidth allocated to the user comprises:
for the target PT-RS port, determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth;
acquiring the number N of frequency bands in the scheduling bandwidth;
comparing the number M of subcarriers with the number N of frequency bands;
if N is larger than M, determining that the scheduling bandwidth allocated to the user is a high-frequency band number mode; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
Wherein the step of determining the number M of subcarriers occupied by the target PT-RS port within the scheduling bandwidth includes:
and determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth according to the corresponding relation between the scheduling bandwidth and the frequency domain density of the preset scheduling bandwidth and the PT-RS signal.
Wherein, the step of sequentially mapping the PT-RS in each frequency band included in the scheduling bandwidth includes:
for any target frequency band in the N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the l time;
acquiring the number of PRBs in the target frequency band;
if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
Wherein, the step of sequentially mapping the PT-RS in each frequency band included in the scheduling bandwidth includes:
sequencing the N frequency bands according to the sequence of the frequency bands from big to small;
for any target frequency band in the sequenced N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the first time;
acquiring the number of PRBs in the target frequency band;
if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
Wherein the method further comprises:
determining whether all PT-RSs are mapped within the N frequency bands;
and if not, continuing to execute the mapping process of the PT-RS.
Wherein the method further comprises:
and if the frequency band number mode is the high frequency band number mode, sequentially mapping the PT-RS once every D PRBs on the whole scheduling bandwidth, wherein T is a natural number.
In a second aspect, an embodiment of the present invention provides a signal processing method, which is applied to a receiving end, and the method includes:
receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth;
respectively carrying out channel estimation on the PT-RS signal of each port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port;
determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
Wherein, the step of determining the phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier includes:
acquiring a channel estimation value of each DMRS port on each subcarrier;
taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier;
and taking the average value of the phase change estimated values on all the subcarriers as the phase change estimated value.
Wherein, the determining the phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier includes:
acquiring a channel estimation value of each DMRS port on each subcarrier;
taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier;
and for each frequency band in the scheduling bandwidth, taking the average value of the phase change estimated values on each subcarrier in the frequency band as the phase change estimated value of each frequency band.
Wherein the step of performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value includes:
and taking the product of the phase change estimated value and the channel estimation result of the DMRS port as the channel estimation result after phase compensation.
Wherein the step of performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value includes:
and utilizing the product of the phase change estimated value of each frequency band and the channel estimation result of the DMRS port as the channel estimation result after the phase compensation of each frequency band.
Wherein the method further comprises:
and demodulating the user data by using the channel estimation result of the DMRS port after the phase compensation.
In a third aspect, an embodiment of the present invention provides a signal processing apparatus, which is applied to a sending end, where the sending end has one or more phase tracking reference signal PT-RS ports; the device comprises:
a determining module, configured to determine a frequency band number mode of a scheduling bandwidth allocated to a user;
a first mapping module, configured to perform, if the frequency band number mode is a low frequency band number mode, mapping, in sequence, on PT-RS ports of any target PT-RS port in the one or more PT-RS ports, a PT-RS in each frequency band included in the scheduling bandwidth;
and the transmission module is used for transmitting the PT-RS signal according to the mapping result.
Wherein the determining module comprises:
the first determining submodule is used for determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth for the target PT-RS port;
a first obtaining submodule, configured to obtain a number N of frequency bands in the scheduling bandwidth;
the first comparison submodule is used for comparing the number M of the subcarriers with the number N of the frequency bands;
the second determining submodule is used for determining that the scheduling bandwidth allocated to the user is a high-frequency band number mode if N is larger than M; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
The first determining submodule is specifically configured to determine, according to the corresponding relationship between the scheduling bandwidth and a frequency domain density of a preset scheduling bandwidth and a PT-RS signal, the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth.
Wherein the first mapping module comprises:
the first obtaining sub-module is used for obtaining the PRB position serial number of the PRB corresponding to the target sub-carrier in any target frequency band in the N frequency bands when the first time of PT-RS mapping is carried out;
a second obtaining submodule, configured to obtain the number of PRBs in the target frequency band;
a first mapping sub-module, configured to map, if the position sequence number is smaller than the number of PRBs in the target frequency band, a PT-RS on a PRB corresponding to the target subcarrier; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
Wherein the first mapping module comprises:
the sequencing submodule is used for sequencing the N frequency bands according to the sequence of the frequency bands from large to small;
a third obtaining sub-module, configured to, for any target frequency band in the N sequenced frequency bands, obtain a PRB position sequence number, in the target frequency band, of a PRB corresponding to a target subcarrier when performing the first PT-RS mapping;
a fourth obtaining submodule, configured to obtain the number of PRBs in the target frequency band;
a second mapping sub-module, configured to map, if the position sequence number is smaller than the number of PRBs in the target frequency band, a PT-RS on a PRB corresponding to the target subcarrier; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
Wherein the first mapping module further comprises:
a judgment submodule, configured to determine whether all PT-RSs are mapped within the N frequency bands; and if not, continuing to execute the mapping process of the PT-RS.
Wherein the apparatus further comprises:
and the second mapping module is used for sequentially mapping the PT-RS once for every D PRBs on the whole scheduling bandwidth if the frequency band number mode is the high frequency band number mode, and T is a natural number.
In a fourth aspect, an embodiment of the present invention provides a signal processing apparatus, applied to a receiving end, including:
the first receiving module is used for receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth;
the first acquisition module is used for respectively carrying out channel estimation on the PT-RS signal of each port and acquiring the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
a second obtaining module, configured to obtain a channel estimation result of the DMRS port corresponding to each PT-RS port;
a determining module, configured to determine a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
the phase compensation module is used for carrying out phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value;
and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
Wherein the determining module comprises:
a first obtaining submodule, configured to obtain a channel estimation value of each DMRS port on each subcarrier;
a first calculation sub-module, configured to use a quotient of a signal estimation value of each subcarrier of each PT-RS port and a channel estimation value of a DMRS port corresponding to each PT-RS port on each subcarrier as an estimation value of a phase change on each subcarrier;
and the first determining submodule is used for taking the average value of the phase change estimated values on all the subcarriers as the phase change estimated value.
Wherein the determining module comprises:
the second acquisition sub-module is used for acquiring a channel estimation value of each DMRS port on each subcarrier;
a second calculation submodule, configured to use a quotient of a signal estimation value of each subcarrier of each PT-RS port and a channel estimation value of a DMRS port corresponding to each PT-RS port on each subcarrier as a phase change estimation value on each subcarrier;
and the second determining submodule is used for taking the average value of the phase change estimated values on each subcarrier in the frequency band as the phase change estimated value of each frequency band for each frequency band in the scheduling bandwidth.
The phase compensation module is specifically configured to use a product of the phase change estimation value and a channel estimation result of the DMRS port as a channel estimation result after phase compensation.
The phase compensation module is specifically configured to use a product of the phase change estimation value of each frequency band and the channel estimation result of the DMRS port as the channel estimation result after phase compensation of each frequency band.
Wherein the apparatus further comprises:
and the data demodulation module is used for demodulating the user data by using the channel estimation result of the DMRS port after the phase compensation.
In a fifth aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; the processor implements the following steps when executing the program:
determining a frequency band number mode of a scheduling bandwidth allocated to a user;
if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in one or more PT-RS ports;
and transmitting the PT-RS signal by using the transceiver according to the mapping result.
In a sixth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing a computer program, where the computer program is executable by a processor to implement the following steps:
determining a frequency band number mode of a scheduling bandwidth allocated to a user;
if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in one or more PT-RS ports;
and transmitting the PT-RS signal according to the mapping result.
In a seventh aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, a transceiver, and a computer program stored in the memory and executable on the processor; the processor implements the following steps when executing the program:
receiving, with the transceiver, PT-RS signals for a plurality of PT-RS ports over a scheduled bandwidth;
respectively carrying out channel estimation on the PT-RS signal of each port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port;
determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
In an eighth aspect, an embodiment of the present invention provides a computer-readable storage medium for storing a computer program, where the computer program is executable by a processor to implement the following steps:
receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth;
respectively carrying out channel estimation on the PT-RS signal of each port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port;
determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
The technical scheme of the invention has the following beneficial effects:
in the embodiment of the invention, when the frequency band number mode of the scheduling bandwidth allocated to the user is the low frequency band number mode, for any target PT-RS port in one or more PT-RS ports of the sending end, the PT-RS mapping is sequentially carried out in each frequency band included in the scheduling bandwidth, and the PT-RS signal is transmitted according to the mapping result, so that the phase noise characteristics of all frequency bands in the user scheduling bandwidth can be obtained, and the performance of phase noise compensation is ensured.
Drawings
FIG. 1 is a schematic diagram of the frequency domain distribution of PT-TS in the prior art;
FIG. 2 is a flow chart of a signal processing method according to an embodiment of the present invention;
FIG. 3 is a flow chart of a signal processing method according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating the mapping of PT-RS in an embodiment of the present invention;
FIG. 5 is a diagram of a signal processing apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the determination module of an embodiment of the present invention;
FIG. 7 is a diagram illustrating a first mapping module according to an embodiment of the invention;
FIG. 8 is a diagram illustrating a first mapping module according to an embodiment of the invention;
FIG. 9 is a diagram illustrating a first mapping module according to an embodiment of the invention;
fig. 10 is a block diagram of a signal processing apparatus according to an embodiment of the present invention;
FIG. 11 is a diagram of a signal processing apparatus according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of the determination module of an embodiment of the present invention;
FIG. 13 is a schematic diagram of the determination module of an embodiment of the present invention;
fig. 14 is a block diagram of a signal processing apparatus according to an embodiment of the present invention;
FIG. 15 is a schematic view of an electronic device according to an embodiment of the invention;
fig. 16 is a schematic diagram of an electronic device according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the present invention will be made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 2, the signal processing method according to the embodiment of the present invention is applied to a sending end, where the sending end has one or more phase tracking reference signal PT-RS ports; the method comprises the following steps:
step 101, determining a frequency band number mode of a scheduling bandwidth allocated to a user.
In an embodiment of the present invention, the band number mode includes a high band number mode and a low band number mode. The high-frequency band number mode refers to a mode in which the PT-RS signal is uniformly arranged in the frequency domain, and the low-frequency band number mode refers to a mode in which the PT-RS signal is non-uniformly arranged in the frequency domain.
Specifically, in this step, for the target PT-RS port, the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth may be determined first, and the number N of frequency bands in the scheduling bandwidth may be obtained. Then, the number M of subcarriers is compared with the number N of frequency bands.
If N is larger than M, determining that the scheduling bandwidth allocated to the user is a high-frequency band number mode; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
In practical application, the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth may be determined according to the corresponding relationship between the scheduling bandwidth and the frequency domain density of the PT-RS signal and the preset scheduling bandwidth.
And 102, if the frequency band number mode is the low frequency band number mode, sequentially mapping the PT-RS in each frequency band included in the scheduling bandwidth for any target PT-RS port in the one or more PT-RS ports.
In the embodiment of the present invention, mapping may be performed as follows:
in a first method, for any target frequency band of N frequency bands, when mapping PT-RS for the l-th time, the PRB position number of the PRB corresponding to the target subcarrier in the target frequency band is obtained, and the number of PRBs in the target frequency band is obtained. If the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, the PT-RS mapping is not carried out in the target frequency band. The position number in each PRB may be numbered from 0, may be numbered from 1, or the like.
The position sequence number of the target subcarrier in the PRB corresponding to the target subcarrier is S + (l-1) xD; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
In a second way, in order to ensure better data transmission and meet the transmission requirements of different frequency bands, N frequency bands may be first sorted in the order from large to small. And for any target frequency band in the sequenced N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the l time. And acquiring the number of PRBs in the target frequency band. If the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band;
the position sequence number of the target subcarrier in the PRB corresponding to the target subcarrier is S + (l-1) xD; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
In the two manners, after the first mapping of PT-RS is completed, it may be further determined whether all PT-RSs are mapped within the N frequency bands, and if not, the PT-RS mapping process may be continuously performed in the manner of the first manner or the second manner. If the mapping process continues in mode two, there may be no need to reorder the N bands.
On the basis, if the frequency band number mode is the high frequency band number mode, the mapping of the PT-RS is sequentially performed for every D PRBs on the whole scheduling bandwidth, wherein D is a natural number.
And 103, transmitting the PT-RS signal according to the mapping result.
In the embodiment of the invention, when the frequency band number mode of the scheduling bandwidth allocated to the user is the low frequency band number mode, for any target PT-RS port in one or more PT-RS ports of the sending end, the PT-RS mapping is sequentially carried out in each frequency band included in the scheduling bandwidth, and the PT-RS signal is transmitted according to the mapping result, so that the phase noise characteristics of all frequency bands in the user scheduling bandwidth can be obtained, and the performance of phase noise compensation is ensured.
Assuming that the PT-RS of the transmitting end has a plurality of ports, a PT-RS port will be described as an example. The transmission scheme of the other ports is identical. And determining the number M of subcarriers occupied by one PT-RS port in the scheduling bandwidth according to the corresponding relation between the actual scheduling bandwidth of the user and the frequency domain density of the PT-RS and the scheduling bandwidth predefined by the system. .
And judging the relation between the frequency band number N in the actual scheduling bandwidth of the user and the calculated M value, thereby determining the frequency band number mode. N and M are natural numbers. If N is larger than M, the mode is a high-frequency band number mode, and the mode is equivalent to a continuous scheduling bandwidth of a frequency domain. Then, according to the corresponding frequency domain density, sequentially mapping PT-RS every T PRBs in the frequency domain, wherein T is a natural number; if N is less than or equal to M, the low frequency band number mode is adopted, and the following mapping operation is carried out.
And sequentially carrying out PT-RS mapping according to the frequency domain sequence of the N frequency bands. In the first mapping, a PT-RS is mapped (can be selected arbitrarily) on a certain subcarrier of an S-th PRB (S is an integer) of each frequency band in the N frequency bands; during the second mapping, a PT-RS is mapped on a subcarrier of the S + D PRB of each frequency band in the N frequency bands, and if the S + D exceeds the number of PRBs of the frequency band, the frequency band is skipped over and the PT-RS mapping is not carried out; and mapping the PT-RS on a sub-carrier of the S + (l-1) multiplied by D PRB of each frequency band in the N frequency bands in the first mapping, and skipping the frequency band and not mapping the PT-RS if the S + (l-1) multiplied by D exceeds the number of PRBs of the frequency band. Until the M PT-RSs complete mapping.
Or in the above process, before mapping, the N frequency bands are sorted according to the size order of the bandwidth, and PT-RS mapping is performed in sequence according to the sorted order of the N frequency bands. Then, the sorted N frequency bands are mapped in the above manner.
In the embodiment of the invention, when the frequency band number mode of the scheduling bandwidth allocated to the user is the low frequency band number mode, for any target PT-RS port in one or more PT-RS ports of the sending end, the PT-RS mapping is sequentially carried out in each frequency band included in the scheduling bandwidth, and the PT-RS signal is transmitted according to the mapping result, so that the phase noise characteristics of all frequency bands in the user scheduling bandwidth can be obtained, and the performance of phase noise compensation is ensured.
As shown in fig. 3, the signal processing method according to the embodiment of the present invention is applied to a receiving end, and the method includes:
step 201, receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth. And if the scheduling bandwidth is in a low-frequency band number mode, mapping the PT-RS signals of the PT-RS ports in each frequency band contained in the scheduling bandwidth.
Step 202, performing channel estimation on the PT-RS signal of each port, respectively, to obtain a channel estimation value of each subcarrier transmitting the PT-RS signal of each port.
And 203, acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port.
And step 204, determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier.
In the embodiment of the invention, a channel estimation value of each DMRS port on each subcarrier is obtained, and the quotient of the signal estimation value of each subcarrier of each PT-RS port and the channel estimation value of the DMRS port corresponding to each PT-RS port on each subcarrier is used as a phase change estimation value on each subcarrier. And taking the average value of the phase change estimated values on all the subcarriers as the phase change estimated value.
Alternatively, the phase change estimate for each frequency band may also be determined as follows. And acquiring a channel estimation value of each DMRS port on each subcarrier, and taking the quotient of the signal estimation value of each subcarrier of each PT-RS port and the channel estimation value of the DMRS port corresponding to each PT-RS port on each subcarrier as a phase change estimation value on each subcarrier. And for each frequency band in the scheduling bandwidth, taking the average value of the phase change estimated values on each subcarrier in the frequency band as the phase change estimated value of each frequency band.
And step 205, performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value.
Here, a product of the phase variation estimation value and the channel estimation result of the DMRS port may be used as a phase-compensated channel estimation result. Or the product of the phase change estimation value of each frequency band and the channel estimation result of the DMRS port can be used as the channel estimation result after the phase compensation of each frequency band.
In the embodiment of the invention, when the frequency band number mode of the scheduling bandwidth allocated to the user is the low frequency band number mode, for any target PT-RS port in one or more PT-RS ports of the sending end, the PT-RS mapping is sequentially carried out in each frequency band included in the scheduling bandwidth, and the PT-RS signal is transmitted according to the mapping result, so that the phase noise characteristics of all frequency bands in the user scheduling bandwidth can be obtained, and the performance of phase noise compensation is ensured.
On the basis of the above embodiments, in order to ensure data transmission, the channel estimation result of the phase-compensated DMRS port may be used to demodulate user data.
In the following embodiment, it is assumed that the transmitting end transmits a 2-port PT-RS. The scheduling bandwidth of the user is 25 PRBs, which are divided into N-4 frequency bands, and the bandwidth is 5 PRBs, 1 PRB, 2 PRBs and 17 PRBs, respectively, as shown in fig. 4.
At a sending end, according to a relation between a user scheduling bandwidth predefined by a system and a PT-RS frequency domain density, assuming that the frequency domain density corresponding to the bandwidth is that every 4 PRBs transmit a PT-RS subcarrier, that is, D is 4. Thus, one PT-RS port occupies 7 subcarriers.
N and M are compared. Since N < M, the following mapping is performed.
And sequentially carrying out PT-RS mapping according to the frequency domain sequence of the N-4 frequency bands. In the first mapping, PT-RS port 0 is mapped on the 10 th subcarrier of the S ═ 1 th PRB of each band, and PT-RS port 1 is mapped on the 9 th subcarrier. Thus each port maps to 4 subcarriers in total; in the second mapping, PT-RS port 0 is mapped on the 10 th subcarrier of the S + D ═ 5 th PRB of each band, and PT-RS port 1 is mapped on the 9 th subcarrier. In fig. 4, the number of PRBs in the 2 nd and 3 rd frequency bands is less than 5, so that the frequency band is skipped without performing PT-RS mapping, and mapping is performed only on the 1 st and 4 th frequency bands, so that each port is mapped to 2 subcarriers at this time; in the 3 rd mapping, PT-RS port 0 is mapped on the 10 th subcarrier of the S +2 × D9 th PRB per band, and PT-RS port 1 is mapped on the 9 th subcarrier. Since the number of PRBs in the 1 st, 2 nd and 3 rd frequency bands is less than 9 in the figure, the frequency band is skipped over, the PT-RS mapping is not performed, and the mapping is performed only on the 4 th frequency band, so that each port is mapped to 1 subcarrier at this time. And the M-7 PT-RSs complete mapping and transmit.
And at a receiving end, receiving the PT-RS of 2 ports on the scheduling bandwidth, respectively carrying out channel estimation on the PT-RS signal of each port, and acquiring a corresponding channel estimation value on the M-7 subcarriers. The estimation result of PT-RS located on OFDM (Orthogonal frequency division Multiplexing) symbol l subcarrier k is denoted as Pk,lFor PT-RS port 0 in fig. 4, there are k-10, 58,70,82,106,154, 202; for PT-RS port 1, k is 9,57,69,81,105,153, 201.
Will be located atThe result of the channel estimation of the DMRS on OFDM symbol 3 subcarrier k is denoted Hk,3The phase change of each OFDM symbol l 4-12 relative to OFDM symbol 3 is calculated as follows:
Figure BDA0001323103160000141
for the PT-RS port 0, the phase change estimated on M-7 subcarriers is averaged to obtain the phase change estimate on the scheduling bandwidth, that is, the phase change estimate is obtained
Figure BDA0001323103160000142
Wherein k is1＝10,k2＝58,k3＝70,k4＝82,k5＝106,k6＝154,k7＝202
Alternatively, the phase change estimate over each frequency band is calculated as follows:
phase change estimation of the first frequency band:
Figure BDA0001323103160000143
phase change estimation of the second frequency band:
Figure BDA0001323103160000144
phase change estimation of the third frequency band:
Figure BDA0001323103160000145
phase change estimation of the fourth frequency band:
Figure BDA0001323103160000151
similarly, the phase change estimation result of the PT-RS port 1 can be obtained.
And compensating the channel estimation of the DMRS by using the phase change estimation result. Channel estimation result H for DMRS port corresponding to PT-RS port 0k,3Use of
Figure BDA0001323103160000152
Performing channel compensation to obtain compensated channel estimation result in scheduling bandwidth
Figure BDA0001323103160000153
Or using the phase change estimation results of the respective frequency bands
Figure BDA0001323103160000154
Performing channel compensation to obtain compensated channel estimation result of each frequency band
Figure BDA0001323103160000155
Similarly, the compensated channel estimation result of the DMRS port corresponding to the PT-RS port 1 may be obtained. And demodulating the user data by using the compensated channel estimation result.
As shown in fig. 5, a signal processing apparatus according to an embodiment of the present invention is applied to a transmitting end, where the transmitting end has one or more PT-RS ports; the device includes:
a determining module 401, configured to determine a frequency band number mode of a scheduling bandwidth allocated to a user; a first mapping module 402, configured to perform, if the frequency band number mode is a low frequency band number mode, PT-RS mapping on any target PT-RS port of the one or more PT-RS ports in sequence within each frequency band included in the scheduling bandwidth; and a transmission module 403, configured to transmit a PT-RS signal according to the mapping result.
As shown in fig. 6, the determining module 401 includes:
a first determining submodule 4011, configured to determine, for the target PT-RS port, a number M of subcarriers occupied by the target PT-RS port within the scheduling bandwidth; a first obtaining sub-module 4012, configured to obtain a number N of frequency bands in the scheduling bandwidth; a first comparing sub-module 4013, configured to compare the number M of subcarriers with the number N of frequency bands; a second determining submodule 4014, configured to determine, if N is greater than M, that the scheduling bandwidth allocated to the user is the high-frequency bandwidth mode; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
The first determining submodule 4011 is specifically configured to determine, according to the corresponding relationship between the scheduling bandwidth and the frequency domain density of the PT-RS signal, the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth.
As shown in fig. 7, the first mapping module 402 includes:
the first obtaining sub-module 4021 is configured to, for any target frequency band of the N frequency bands, obtain a PRB position sequence number, in the target frequency band, of a PRB corresponding to a target subcarrier when performing the first PT-RS mapping; a second obtaining sub-module 4022, configured to obtain the number of PRBs in the target frequency band; a first mapping sub-module 4023, configured to map a PT-RS on a PRB corresponding to the target subcarrier if the location sequence number is smaller than the number of PRBs in the target frequency band; otherwise, not performing the PT-RS mapping in the target frequency band; the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
As shown in fig. 8, the first mapping module 402 includes:
the ordering submodule 4024 is configured to order the N frequency bands in an order from large to small; a third obtaining sub-module 4025, configured to obtain, for any target frequency band in the N sequenced frequency bands, a PRB position sequence number of a PRB corresponding to a target subcarrier in the target frequency band when performing the first PT-RS mapping; a fourth obtaining sub-module 4026, configured to obtain the number of PRBs in the target frequency band; a second mapping sub-module 4027, configured to map a PT-RS on a PRB corresponding to the target subcarrier if the location sequence number is smaller than the number of PRBs in the target frequency band; otherwise, not performing the PT-RS mapping in the target frequency band; the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
As shown in fig. 9, on the basis of fig. 7 or fig. 8 (only fig. 7 is shown here), the first mapping module 402 further includes: a determining sub-module 4028, configured to determine whether all PT-RSs are mapped in the N frequency bands; and if not, continuing to execute the mapping process of the PT-RS.
As shown in fig. 10, the apparatus further includes: a second mapping module 404, configured to perform, if the frequency band number mode is a high frequency band number mode, mapping of PT-RS for every D PRBs sequentially on the entire scheduling bandwidth, where D is a natural number.
In the embodiment of the invention, when the frequency band number mode of the scheduling bandwidth allocated to the user is the low frequency band number mode, for any target PT-RS port in one or more PT-RS ports of the sending end, the PT-RS mapping is sequentially carried out in each frequency band included in the scheduling bandwidth, and the PT-RS signal is transmitted according to the mapping result, so that the phase noise characteristics of all frequency bands in the user scheduling bandwidth can be obtained, and the performance of phase noise compensation is ensured.
As shown in fig. 11, the signal processing apparatus according to the embodiment of the present invention, applied to a receiving end, includes:
a first receiving module 1001, configured to receive PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth; a first obtaining module 1002, configured to perform channel estimation on the PT-RS signal of each port respectively, and obtain a channel estimation value of each subcarrier transmitting the PT-RS signal of each port; a second obtaining module 1003, configured to obtain a channel estimation result of the DMRS port corresponding to each PT-RS port; a determining module 1004, configured to determine, according to the channel estimation value of each subcarrier, a phase change estimation value corresponding to each PT-RS port; a phase compensation module 1005, configured to perform phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
As shown in fig. 12, the determining module 1004 includes:
a first obtaining sub-module 10041, configured to obtain a channel estimation value of each DMRS port on each subcarrier; a first calculating sub-module 10042, configured to use a quotient of a signal estimation value of each subcarrier of each PT-RS port and a channel estimation value of a DMRS port corresponding to each PT-RS port on each subcarrier as an estimation value of a phase change on each subcarrier; a first determining sub-module 10043 is configured to use an average value of the phase variation estimation values on all sub-carriers as the phase variation estimation value.
As shown in fig. 13, the determining module 1004 includes:
a second obtaining sub-module 10044, configured to obtain a channel estimation value of each DMRS port on each subcarrier; a second calculating sub-module 10045, configured to use a quotient of the signal estimation value of each subcarrier of each PT-RS port and the channel estimation value of the DMRS port corresponding to each PT-RS port on each subcarrier as the phase change estimation value on each subcarrier; a second determining sub-module 10046 is configured to, for each frequency band in the scheduling bandwidth, use an average value of the phase change estimation values on each subcarrier in the frequency band as the phase change estimation value of each frequency band.
The phase compensation module 1005 is specifically configured to use a product of the phase change estimation value and the channel estimation result of the DMRS port as a channel estimation result after phase compensation. Alternatively, the phase compensation module 1005 is specifically configured to use a product of the phase change estimation value of each frequency band and the channel estimation result of the DMRS port as the channel estimation result after phase compensation of each frequency band.
As shown in fig. 14, the apparatus further includes: a data demodulation module 1006, configured to demodulate user data using the channel estimation result of the phase compensated DMRS port.
In the embodiment of the invention, when the frequency band number mode of the scheduling bandwidth allocated to the user is the low frequency band number mode, for any target PT-RS port in one or more PT-RS ports of the sending end, the PT-RS mapping is sequentially carried out in each frequency band included in the scheduling bandwidth, and the PT-RS signal is transmitted according to the mapping result, so that the phase noise characteristics of all frequency bands in the user scheduling bandwidth can be obtained, and the performance of phase noise compensation is ensured.
As shown in fig. 15, the electronic device according to the embodiment of the present invention includes: the processor 1400 is used for reading the program in the memory 1420 and executing the following processes:
determining a frequency band number mode of a scheduling bandwidth allocated to a user; if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in the one or more PT-RS ports; the PT-RS signal is transmitted through the transceiver 1410 according to the mapping result by the transceiver 1410.
A transceiver 1410 for receiving and transmitting data under the control of the processor 1400.
Where in fig. 15 the bus architecture may include any number of interconnected buses and bridges, in particular one or more processors, represented by the processor 1400, and various circuits of memory, represented by the memory 1420, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1410 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 1400 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1400 in performing operations.
The processor 1400 is responsible for managing the bus architecture and general processing, and the memory 1420 may store data used by the processor 1400 in performing operations.
The processor 1400 is further configured to, for the target PT-RS port, determine the number M of subcarriers occupied by the target PT-RS port within the scheduling bandwidth; acquiring the number N of frequency bands in the scheduling bandwidth; comparing the number M of subcarriers with the number N of frequency bands; if N is larger than M, determining that the scheduling bandwidth allocated to the user is a high-frequency band number mode; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
The processor 1400 is further configured to determine, according to the scheduling bandwidth and a corresponding relationship between a preset scheduling bandwidth and a frequency domain density of the PT-RS signal, a number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth.
The processor 1400 is further configured to, for any target frequency band of the N frequency bands, obtain a PRB position sequence number, in the target frequency band, of a PRB corresponding to a target subcarrier when performing the first-time PT-RS mapping; acquiring the number of PRBs in the target frequency band; if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band; the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
The processor 1400 is further configured to sort the N frequency bands in an order from a larger frequency band to a smaller frequency band;
for any target frequency band in the sequenced N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the first time; acquiring the number of PRBs in the target frequency band; if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band; the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
Processor 1400 is further configured to determine whether all PT-RSs are mapped within the N frequency bands; and if not, continuing to execute the mapping process of the PT-RS.
The processor 1400 is further configured to, if the frequency band number mode is the high frequency band number mode, sequentially perform mapping of PT-RS once for every D PRBs in the entire scheduling bandwidth, where D is a natural number.
As shown in fig. 16, the electronic device according to the embodiment of the present invention includes: the processor 1500, which is used to read the program in the memory 1520, executes the following processes:
receiving, by the transceiver 1510, PT-RS signals for a plurality of PT-RS ports on a scheduled bandwidth; respectively carrying out channel estimation on the PT-RS signal of each port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port; acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port; determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier; performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
A transceiver 1510 for receiving and transmitting data under the control of the processor 1500.
In fig. 16, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 1500 and various circuits of memory represented by memory 1520 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1510 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 may store data used by the processor 1500 in performing operations.
The processor 1500 is responsible for managing the bus architecture and general processing, and the memory 1520 may store data used by the processor 1500 in performing operations.
Processor 1500 is further configured to obtain a channel estimate for each of the DMRS ports on each of the subcarriers; taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier; and taking the average value of the phase change estimated values on all the subcarriers as the phase change estimated value.
Processor 1500 is further configured to obtain a channel estimate for each DMRS port on each subcarrier; taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier; and for each frequency band in the scheduling bandwidth, taking the average value of the phase change estimated values on each subcarrier in the frequency band as the phase change estimated value of each frequency band.
The processor 1500 is further configured to utilize a product of the phase variation estimation value and the channel estimation result of the DMRS port as a phase compensated channel estimation result.
The processor 1500 is further configured to utilize a product of the phase variation estimation value of each band and the channel estimation result of the DMRS port as the channel estimation result after phase compensation of each band.
The processor 1500 is further configured to demodulate user data using the phase compensated channel estimation result of the DMRS port.
Furthermore, a computer-readable storage medium of an embodiment of the present invention stores a computer program executable by a processor to implement:
determining a frequency band number mode of a scheduling bandwidth allocated to a user;
if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in one or more PT-RS ports;
and transmitting the PT-RS signal according to the mapping result.
Wherein the step of determining the frequency band number mode of the scheduling bandwidth allocated to the user comprises:
for the target PT-RS port, determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth;
acquiring the number N of frequency bands in the scheduling bandwidth;
comparing the number M of subcarriers with the number N of frequency bands;
if N is larger than M, determining that the scheduling bandwidth allocated to the user is a high-frequency band number mode; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
Wherein the step of determining the number M of subcarriers occupied by the target PT-RS port within the scheduling bandwidth includes:
and determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth according to the corresponding relation between the scheduling bandwidth and the frequency domain density of the preset scheduling bandwidth and the PT-RS signal.
Wherein, the step of sequentially mapping the PT-RS in each frequency band included in the scheduling bandwidth includes:
for any target frequency band in the N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the l time;
acquiring the number of PRBs in the target frequency band;
if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
Wherein, the step of sequentially mapping the PT-RS in each frequency band included in the scheduling bandwidth includes:
sequencing the N frequency bands according to the sequence of the frequency bands from big to small;
for any target frequency band in the sequenced N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the first time;
acquiring the number of PRBs in the target frequency band;
if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
Wherein the method further comprises:
determining whether all PT-RSs are mapped within the N frequency bands;
and if not, continuing to execute the mapping process of the PT-RS.
Wherein the method further comprises:
and if the frequency band number mode is the high frequency band number mode, sequentially mapping the PT-RS once every D PRBs on the whole scheduling bandwidth, wherein D is a natural number.
Furthermore, a computer-readable storage medium of an embodiment of the present invention stores a computer program executable by a processor to implement:
receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth;
respectively carrying out channel estimation on the PT-RS signal of each port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port;
determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
Wherein, the step of determining the phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier includes:
acquiring a channel estimation value of each DMRS port on each subcarrier;
taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier;
and taking the average value of the phase change estimated values on all the subcarriers as the phase change estimated value.
Wherein, the determining the phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier includes:
acquiring a channel estimation value of each DMRS port on each subcarrier;
taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier;
and for each frequency band in the scheduling bandwidth, taking the average value of the phase change estimated values on each subcarrier in the frequency band as the phase change estimated value of each frequency band.
Wherein the step of performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value includes:
and taking the product of the phase change estimated value and the channel estimation result of the DMRS port as the channel estimation result after phase compensation.
Wherein the step of performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value includes:
and utilizing the product of the phase change estimated value of each frequency band and the channel estimation result of the DMRS port as the channel estimation result after the phase compensation of each frequency band.
Wherein the method further comprises: and demodulating the user data by using the channel estimation result of the DMRS port after the phase compensation.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be physically included alone, or two or more units may be integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute some steps of the transceiving method according to various embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (30)

1. A signal processing method is characterized in that the method is applied to a sending end, and the sending end is provided with one or more phase tracking reference signal PT-RS ports; the method comprises the following steps:
determining a frequency band number mode of a scheduling bandwidth allocated to a user;
if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in one or more PT-RS ports;
and transmitting the PT-RS signal according to the mapping result.
2. The method of claim 1, wherein the step of determining the frequency band number pattern of the scheduling bandwidth allocated to the user comprises:
for the target PT-RS port, determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth;
acquiring the number N of frequency bands in the scheduling bandwidth;
comparing the number M of subcarriers with the number N of frequency bands;
if N is larger than M, determining that the scheduling bandwidth allocated to the user is a high-frequency band number mode; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
3. The method of claim 2, wherein the step of determining the number M of subcarriers occupied by the target PT-RS port within the scheduling bandwidth comprises:
and determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth according to the corresponding relation between the scheduling bandwidth and the frequency domain density of the preset scheduling bandwidth and the PT-RS signal.
4. The method of claim 2, wherein the step of sequentially mapping the PT-RSs in each frequency band included in the scheduling bandwidth comprises:
for any target frequency band in the N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the l time;
acquiring the number of PRBs in the target frequency band;
if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
5. The method of claim 2, wherein the step of sequentially mapping the PT-RSs in each frequency band included in the scheduling bandwidth comprises:
sequencing the N frequency bands according to the sequence of the frequency bands from big to small;
for any target frequency band in the sequenced N frequency bands, acquiring the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band when carrying out the mapping of the PT-RS for the first time;
acquiring the number of PRBs in the target frequency band;
if the position serial number is smaller than the number of PRBs in the target frequency band, mapping PT-RS on the PRBs corresponding to the target subcarriers; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
6. The method according to claim 4 or 5, characterized in that the method further comprises:
determining whether all PT-RSs are mapped within the N frequency bands;
and if not, continuing to execute the mapping process of the PT-RS.
7. The method of claim 1, further comprising:
and if the frequency band number mode is the high frequency band number mode, sequentially mapping the PT-RS once every D PRBs on the whole scheduling bandwidth, wherein D is a natural number.
8. A signal processing method, applied to a receiving end, the method comprising:
receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth;
respectively carrying out channel estimation on the PT-RS signal of each PT-RS port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port;
determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
9. The method according to claim 8, wherein the step of determining the phase variation estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier comprises:
acquiring a channel estimation value of each DMRS port on each subcarrier;
taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier;
and taking the average value of the phase change estimated values on all the subcarriers as the phase change estimated value.
10. The method of claim 8, wherein determining the phase variation estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier comprises:
acquiring a channel estimation value of each DMRS port on each subcarrier;
taking a quotient of a signal estimate for each subcarrier of said each PT-RS port and a channel estimate for a DMRS port on said each subcarrier corresponding to said each PT-RS port as an estimate of phase variation on said each subcarrier;
and for each frequency band in the scheduling bandwidth, taking the average value of the phase change estimated values on each subcarrier in the frequency band as the phase change estimated value of each frequency band.
11. The method of claim 9, wherein the step of phase compensating the channel estimation result for the DMRS port according to the phase change estimate value comprises:
and taking the product of the phase change estimated value and the channel estimation result of the DMRS port as the channel estimation result after phase compensation.
12. The method of claim 10, wherein the step of phase compensating the channel estimation result for the DMRS port according to the phase change estimation value comprises:
and utilizing the product of the phase change estimated value of each frequency band and the channel estimation result of the DMRS port as the channel estimation result after the phase compensation of each frequency band.
13. The method of claim 8, further comprising:
and demodulating the user data by using the channel estimation result of the DMRS port after the phase compensation.
14. A signal processing device is applied to a sending end, wherein the sending end is provided with one or more PT-RS ports; the device comprises:
a determining module, configured to determine a frequency band number mode of a scheduling bandwidth allocated to a user;
a first mapping module, configured to perform, for any target PT-RS port of the one or more PT-RS ports, PT-RS mapping in sequence within each frequency band included in the scheduling bandwidth if the frequency band number mode is the low frequency band number mode;
and the transmission module is used for transmitting the PT-RS signal according to the mapping result.
15. The apparatus of claim 14, wherein the determining module comprises:
the first determining submodule is used for determining the number M of subcarriers occupied by the target PT-RS port in the scheduling bandwidth for the target PT-RS port;
a first obtaining submodule, configured to obtain a number N of frequency bands in the scheduling bandwidth;
the first comparison submodule is used for comparing the number M of the subcarriers with the number N of the frequency bands;
the second determining submodule is used for determining that the scheduling bandwidth allocated to the user is a high-frequency band number mode if N is larger than M; if N is less than or equal to M, determining that the scheduling bandwidth allocated to the user is a low-frequency bandwidth number mode; wherein N and M are natural numbers.
16. The apparatus according to claim 15, wherein the first determining sub-module is specifically configured to determine, according to the scheduling bandwidth and a correspondence between a preset scheduling bandwidth and a frequency-domain density of PT-RS signals, a number M of sub-carriers occupied by the target PT-RS port within the scheduling bandwidth.
17. The apparatus of claim 15, wherein the first mapping module comprises:
the first obtaining sub-module is used for obtaining the PRB position serial number of the PRB corresponding to the target sub-carrier in any target frequency band in the N frequency bands when the first time of PT-RS mapping is carried out;
a second obtaining submodule, configured to obtain the number of PRBs in the target frequency band;
a first mapping sub-module, configured to map, if the position sequence number is smaller than the number of PRBs in the target frequency band, a PT-RS on a PRB corresponding to the target subcarrier; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
18. The apparatus of claim 15, wherein the first mapping module comprises:
the sequencing submodule is used for sequencing the N frequency bands according to the sequence of the frequency bands from large to small;
a third obtaining sub-module, configured to, for any target frequency band in the N sequenced frequency bands, obtain a PRB position sequence number, in the target frequency band, of a PRB corresponding to a target subcarrier when performing the first PT-RS mapping;
a fourth obtaining submodule, configured to obtain the number of PRBs in the target frequency band;
a second mapping sub-module, configured to map, if the position sequence number is smaller than the number of PRBs in the target frequency band, a PT-RS on a PRB corresponding to the target subcarrier; otherwise, not performing the PT-RS mapping in the target frequency band;
the PRB position serial number of the PRB corresponding to the target subcarrier in the target frequency band is S + (l-1) multiplied by D; wherein, S is an integer, l, D is a natural number, which means that each D PRBs contain a PT-RS subcarrier.
19. The apparatus of claim 17 or 18, wherein the first mapping module further comprises:
a judgment submodule, configured to determine whether all PT-RSs are mapped within the N frequency bands; and if not, continuing to execute the mapping process of the PT-RS.
20. The apparatus of claim 14, further comprising:
and the second mapping module is used for sequentially mapping the PT-RS once for every D PRBs on the whole scheduling bandwidth if the frequency band number mode is the high frequency band number mode, wherein D is a natural number.
21. A signal processing apparatus, applied to a receiving end, comprising:
the first receiving module is used for receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth;
the first acquisition module is used for respectively carrying out channel estimation on the PT-RS signal of each PT-RS port and acquiring the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
the second acquisition module is used for acquiring the channel estimation result of the DMRS port corresponding to each PT-RS port;
a determining module, configured to determine a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
the phase compensation module is used for carrying out phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value;
and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
22. The apparatus of claim 21, wherein the determining module comprises:
a first obtaining submodule, configured to obtain a channel estimation value of each DMRS port on each subcarrier;
a first calculation sub-module, configured to use a quotient of a signal estimation value of each subcarrier of each PT-RS port and a channel estimation value of a DMRS port corresponding to each PT-RS port on each subcarrier as an estimation value of a phase change on each subcarrier;
and the first determining submodule is used for taking the average value of the phase change estimated values on all the subcarriers as the phase change estimated value.
23. The apparatus of claim 21, wherein the determining module comprises:
the second acquisition sub-module is used for acquiring a channel estimation value of each DMRS port on each subcarrier;
a second calculation submodule, configured to use a quotient of a signal estimation value of each subcarrier of each PT-RS port and a channel estimation value of a DMRS port corresponding to each PT-RS port on each subcarrier as a phase change estimation value on each subcarrier;
and the second determining submodule is used for taking the average value of the phase change estimated values on each subcarrier in the frequency band as the phase change estimated value of each frequency band for each frequency band in the scheduling bandwidth.
24. The apparatus of claim 22, wherein the phase compensation module is configured to utilize a product of the phase variation estimate and a channel estimation result for the DMRS port as a phase compensated channel estimation result.
25. The apparatus of claim 22, wherein the phase compensation module is configured to utilize a product of the phase variation estimate for each band and the channel estimation result for the DMRS port as the phase compensated channel estimation result for each band.
26. The apparatus of claim 21, further comprising:
and the data demodulation module is used for demodulating the user data by using the channel estimation result of the DMRS port after the phase compensation.
27. An electronic device comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:
determining a frequency band number mode of a scheduling bandwidth allocated to a user;
if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in one or more PT-RS ports;
and transmitting the PT-RS signal by using the transceiver according to the mapping result.
28. A computer-readable storage medium storing a computer program executable by a processor to perform the steps of:
determining a frequency band number mode of a scheduling bandwidth allocated to a user;
if the frequency band number mode is a low frequency band number mode, sequentially mapping the PT-RS in each frequency band contained in the scheduling bandwidth for any target PT-RS port in one or more PT-RS ports;
and transmitting the PT-RS signal according to the mapping result.
29. An electronic device comprising a memory, a processor, a transceiver, and a computer program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:
receiving, with the transceiver, PT-RS signals for a plurality of PT-RS ports over a scheduled bandwidth;
respectively carrying out channel estimation on the PT-RS signal of each PT-RS port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port;
determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
30. A computer-readable storage medium storing a computer program executable by a processor to perform the steps of:
receiving PT-RS signals of a plurality of PT-RS ports on a scheduling bandwidth;
respectively carrying out channel estimation on the PT-RS signal of each PT-RS port to obtain the channel estimation value of each subcarrier for transmitting the PT-RS signal of each port;
acquiring a channel estimation result of the DMRS port corresponding to each PT-RS port;
determining a phase change estimation value corresponding to each PT-RS port according to the channel estimation value of each subcarrier;
performing phase compensation on the channel estimation result of the DMRS port according to the phase change estimation value; and if the scheduling bandwidth is a low-frequency band number mode, the PT-RS signals of the PT-RS ports are mapped in each frequency band contained in the scheduling bandwidth.
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