CN112118202B - Base station data modulation method and device - Google Patents
Base station data modulation method and device Download PDFInfo
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- CN112118202B CN112118202B CN201910542932.1A CN201910542932A CN112118202B CN 112118202 B CN112118202 B CN 112118202B CN 201910542932 A CN201910542932 A CN 201910542932A CN 112118202 B CN112118202 B CN 112118202B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/345—Modifications of the signal space to allow the transmission of additional information
- H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
- H04L27/3483—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel using a modulation of the constellation points
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Abstract
The invention discloses a method and a device for modulating base station data, wherein the method comprises the following steps: determining a compensation coefficient according to an original modulation mode and a preset uniform modulation mode of a user, and splicing the compensation coefficient on a resource position allocated to the user; converting a bit stream of a user into a bit stream corresponding to a preset uniform modulation mode to obtain a pre-modulation bit stream, and performing layer mapping and data mapping on the pre-modulation bit stream; modulating the pre-modulation bit stream subjected to layer mapping and data mapping by adopting a preset uniform modulation mode to obtain modulated data; and acquiring a compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result adopted by the user in the original modulation mode. The invention can obviously reduce the complexity of fragmentation processing, reduce the chip processing overhead and simultaneously compress the data scale.
Description
Technical Field
The present invention relates to the field of digital communications, and in particular, to a method and an apparatus for modulating base station data.
Background
With the continuous evolution of 3GPP protocols and the continuous development of Internet of things, the number of intelligent terminals and the data transmission amount are increased rapidly. The number of Resource blocks (RB for short) in the Evolution from the Long Term Evolution system (Long Term Evolution, LTE for short) to the New Radio interface (New Radio, NR for short) is increased from 100 to 272, and the number of supported streams is also increased greatly. On the other hand, the chip technology gradually approaches the limit, moore's law is about to fail, and the two aspects are combined to bring more and more challenges to the base station side, especially to the Downlink Shared Channel (PDSCH) of the Physical layer.
UMTS Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access, abbreviated as E-UTRA) Evolved in document 3gpp TS 36.211; in Physical channels and modulation (Physical channels and modulation), it can be seen that the modulation schemes of the downlink shared channel of the existing Physical layer are divided into four types, namely Quadrature Phase Shift Keying (QPSK), 16-Phase Quadrature Amplitude modulation QAM (16qam), 64QAM and 256QAM, and the normal modulation process is to read a bit stream with a specific length according to the modulation scheme and then look up a constellation diagram to obtain a 32-bit complex signal.
Since the modulation modes of each Transport Block (TB) of each terminal may be different, if the number of users is large, fragmentation of data processing is very serious, which causes problems of large processing overhead of a chip, large occupied memory space, and large data overhead.
Disclosure of Invention
The embodiment of the invention provides a base station data modulation method and device, which are used for solving the problems of serious fragmentation of data processing, large processing overhead of a chip, more occupied memory space and large data overhead in the prior art.
The embodiment of the invention provides a base station data modulation method, which comprises the following steps:
determining a compensation coefficient according to an original modulation mode and a preset unified modulation mode of a user, and splicing the compensation coefficient on a resource position allocated to the user;
converting a bit stream of a user into a bit stream corresponding to a preset unified modulation mode to obtain a pre-modulation bit stream, and performing layer mapping and data mapping on the pre-modulation bit stream;
modulating the pre-modulation bit stream subjected to layer mapping and data mapping by adopting a preset uniform modulation mode to obtain modulated data;
and acquiring a compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result adopted by the user in the original modulation mode.
An embodiment of the present invention further provides a base station data modulation apparatus, which is disposed in a base station, and specifically includes:
the determining and splicing module is used for determining a compensation coefficient according to the original modulation mode and the preset uniform modulation mode of the user and splicing the compensation coefficient on a resource position allocated to the user;
the conversion mapping module is used for converting the bit stream of the user into the bit stream corresponding to the preset uniform modulation mode to obtain a pre-modulation bit stream, and performing layer mapping and data mapping on the pre-modulation bit stream;
the data modulation module is used for modulating the pre-modulation bit stream subjected to the layer mapping and the data mapping by adopting a preset uniform modulation mode to obtain modulated data;
and the data processing module is used for acquiring a compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result of the user in the original modulation mode.
An embodiment of the present invention further provides a base station data modulation apparatus, including: the base station data modulation method comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the steps of the base station data modulation method are realized when the computer program is executed by the processor.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the base station data modulation method are implemented.
By adopting the embodiment of the invention, the complexity of fragmentation processing can be obviously reduced, the chip processing overhead is reduced, and the data scale is compressed.
The above description is only an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description so as to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a base station data modulation method according to an embodiment of the present invention;
fig. 2 is a flowchart of detailed processing of a base station data modulation method according to an embodiment of the present invention;
FIG. 3 is a first schematic diagram of a base station data modulation apparatus according to an embodiment of the present invention;
fig. 4 is a second schematic diagram of a base station data modulation apparatus according to an embodiment of the present invention.
Detailed Description
In a large-capacity scenario, a 32-bit complex signal output by a conventional modulation method also occupies a very large memory space, and overhead of Layer Mapping (Layer Mapping), data Mapping (Mapping to physical resources) and final data transmission is very large while flexibility and expandability of a module are reduced. In addition, the complexity of logic and the inconsistency of Processing make the Processing of data depend heavily on a Digital Signal Processing (DSP) platform, and it is not easy to implement in an accelerator chip, which restricts the subsequent evolution of the architecture and the update of the system.
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
According to an embodiment of the present invention, a method for modulating base station data is provided, fig. 1 is a flowchart of the method for modulating base station data according to the embodiment of the present invention, and as shown in fig. 1, the method for modulating base station data according to the embodiment of the present invention specifically includes:
step 101, determining a compensation coefficient according to an original modulation mode and a preset uniform modulation mode of a user, and splicing the compensation coefficient on a resource position allocated to the user; wherein, the original modulation mode specifically comprises: quadrature phase shift keying QPSK, 16quadrature amplitude modulation 16QAM, 64 quadrature amplitude modulation 64QAM, and 256 quadrature amplitude modulation 256QAM. In the embodiment of the present invention, the predetermined unified modulation method is: 256 phase quadrature amplitude modulation 256QAM. Of course, the source modulation scheme and the predetermined unified modulation scheme are not limited to the above listed modulation schemes.
That is, in step 101, the modulated compensation coefficients need to be spliced according to the modulation scheme of the user and the allocated resource location.
In step 101, determining a compensation coefficient according to an original modulation mode of a user and a predetermined unified modulation mode specifically includes:
determining a first constellation diagram value corresponding to an original bit stream according to an original modulation mode constellation diagram;
determining a second constellation diagram value corresponding to the bit stream corresponding to the original bit stream according to a predetermined uniform modulation mode constellation diagram;
and dividing the first constellation diagram value by the second constellation diagram value to obtain a compensation coefficient.
For example, if the original modulation mode is QPSK and the predetermined unified modulation mode is 256QAM, according to the constellation diagram, the bit data under QPSK is 0, and the corresponding constellation value is
The corresponding bit data under 256QAM is 0101, and the corresponding constellation value is
The compensation factor is
Is divided by
To obtain a compensation coefficient of
In step 101, splicing the compensation coefficient to the resource location allocated to the user specifically includes: one compensation coefficient is spliced per resource block per transmission time interval, TTI, before the arrival of the bitstream data.
102, converting a bit stream of a user into a bit stream corresponding to a preset uniform modulation mode to obtain a premodulation bit stream, and performing layer mapping and data mapping on the premodulation bit stream; the specific processing of layer mapping and data mapping is already specified in the 3gpp TS 36.211 protocol.
That is, in step 102, it is necessary to convert bit streams of different modulation schemes into bit streams of a uniform modulation scheme, and the converted bit streams are referred to as pre-modulation bit streams. In the base station communication system, a 256QAM modulation scheme is preferable.
103, modulating the premodulation bit stream after layer mapping and data mapping by adopting a preset uniform modulation mode to obtain modulated data;
and 104, acquiring a compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result of the user in the original modulation mode. Namely, the result consistent with the constellation map table look-up in the protocol 3GPP TS 36.211 is obtained.
In step 104, multiplying the modulated data by the compensation coefficient specifically includes:
and multiplying the compensation coefficient by the W weight at each transmission time interval TTI, and multiplying the obtained product by the modulated data. That is, the processing of multiplying the compensation coefficient by the W weight in the offline state does not increase the amount of calculation in the online processing.
The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the embodiment, according to a physical layer protocol of 3GPP, 4 modulation modes supported by a downlink shared channel are enumerated, and the implementation steps of the method described in this patent are used. Fig. 2 is a flowchart of detailed processing of a base station data modulation method according to an embodiment of the present invention, and as shown in fig. 2, the detailed processing specifically includes the following processing:
before describing the process of the present invention in detail, first, the constellation diagrams corresponding to different modulation schemes in the 3GPP physical layer protocol are listed.
The constellation diagram of the modulation mode is as follows:
QPSK inputs 2 bits of data, with a real 1 bit and an imaginary 1 bit. The data is complex data according to the following constellation diagram:
16QAM inputs 4 bits of data, with a real part of 2 bits and an imaginary part of 2 bits. The data is complex data according to the following constellation diagram:
64QAM inputs 6 bits of data, with 3 bits in the real part and 3 bits in the imaginary part. The data is complex data according to the following constellation diagram:
256QAM inputs 8 bits of data with 4 bits in the real part and 4 bits in the imaginary part. The data is complex data according to the following constellation diagram:
based on the constellation diagram, the following processing is executed:
step 201, obtaining a compensation coefficient according to a modulation mode and mapping a bit stream into pre-modulation data.
According to the implementation mode of the invention, different modulation mode processing methods are as follows:
the compensation factor of QPSK is
Pre-modulation bit data corresponding to input bit data, 256QAM modulation output and compensationThe rear constellation is as follows:
the compensation factor of 16QAM is
The pre-modulation bit data corresponding to the input bit data, the 256QAM modulation output and the compensated constellation diagram are as follows:
the compensation factor of 64QAM is
The pre-modulation bit data corresponding to the input bit data, the 256QAM modulation output and the compensated constellation diagram are as follows:
the compensation factor of 256QAM is 1, the pre-modulation bit data corresponding to the input bit data, the 256QAM modulation output and the compensated constellation diagram are as follows:
specifically, according to the above table, in step 201, the corresponding compensation coefficients are selected according to the modulation scheme for splicing. And mapping and converting the bit data into the pre-modulation data according to the mapping relation between the bit data and the pre-modulation bit data in the table.
Step 202, judging whether there is any terminal to execute the above-mentioned processing, if yes, returning to step 201, otherwise, executing step 203,
step 203, layering premodulation data;
step 204, mapping the pre-modulation data;
step 205, transmitting the premodulation data;
step 206, modulating the pre-modulation data in a 256QAM mode;
and step 207, multiplying the compensation coefficient by the weight, and then multiplying the compensation coefficient by the data subjected to 256QAM modulation to finally obtain a constellation diagram consistent with the protocol.
For example, a bit stream of 64QAM for a single terminal is transmitted as 010010 010101 011011 001010, and according to the above procedure, the compensation factor is
The 64QAM bit stream is first mapped to pre-modulation data: 00000000 00001011 0001000100110000, represented by hexadecimal notation as 0x00,0x0B,0x11,0x30, each Byte corresponds to one RE (Resource Element). Then, according to the protocol processing, the Byte stream of the pre-modulated data is layered and mapped, and the mapped data is transmitted to the chip unit of the next-stage processing. Assuming that the data only has one layer, after the chip of the next stage receives the pre-modulation data, the pre-modulation data is modulated according to 256QAM to obtain modulation data
Finally, the obtained modulation data is multiplied by a compensation factor
Get the final output
The corresponding fixed-point 32-bit complex data is: 0x31613161 and 0x3161F620，0x45214521，0x09E03161。
As can be seen from the comparison of the above examples, the use of 8-bit pre-modulation data can reduce the size of the processed data and improve the processing and transmission efficiency compared with directly modulating the data to obtain 32-bit data from the beginning.
In the embodiment of the present invention, in the downlink shared channel of the base station, the first-step splicing compensation coefficient may start processing before the arrival of the bitstream data, and each RB (Resource Block) of each TTI (Transmission Time Interval) only processes one value. The multiplication compensation coefficient of the fourth step can be multiplied on the W weight value in each TTI by using the commutative law of multiplication, and does not need to be calculated separately. Can be processed in parallel with the existing flow pipeline.
In the embodiment of the invention, bit streams with different modulation modes are uniformly converted into pre-modulation bit streams with the same format, and the output bit width is reduced from 32 bits to 8 bits. And the differentiated processing flow is compressed to the lowest, and the complexity of fragmentation processing is reduced. In addition, the reduction of the output bit width improves the throughput of processing data, and further improves the efficiency.
In the embodiment of the invention, layer mapping and data mapping are also required according to the protocol, and compared with the mapping of 32-bit modulation output, the mapping of 8-bit pre-modulation bit stream is simpler and more efficient. The reduction of the data volume also compresses the transmitted data into one fourth of the original data, thereby avoiding the data transmission becoming the bottleneck of the system.
And finally, uniformly modulating the pre-modulation bit stream according to 256QAM and multiplying the W weight with the compensation coefficient, wherein the logic and the function of the block are very simple, and the block is conveniently realized by using pipeline processing or a hardware accelerator.
In summary, with the aid of the technical solutions of the embodiments of the present invention, by using the improved method for modulating base station data in the present invention, the complexity of fragmentation processing can be significantly reduced, the chip processing overhead can be reduced, and the data size can be compressed at the same time. The flexibility and expansibility of the module and the transmission of data are greatly increased. The transition to support continued improvement of the later architecture is also more smooth.
According to an embodiment of the present invention, a base station data modulation apparatus is provided, fig. 3 is a schematic diagram of the base station data modulation apparatus according to the embodiment of the present invention, and as shown in fig. 3, the base station data modulation apparatus according to the embodiment of the present invention specifically includes:
a determining and splicing module 30, configured to determine a compensation coefficient according to an original modulation mode of a user and a predetermined unified modulation mode, and splice the compensation coefficient to a resource location allocated to the user; wherein, the original modulation mode specifically comprises: quadrature phase shift keying QPSK, 16quadrature amplitude modulation 16QAM, 64 quadrature amplitude modulation 64QAM, and 256 quadrature amplitude modulation 256QAM. The predetermined unified modulation mode is: 256 phase quadrature amplitude modulation 256QAM. Of course, the source modulation scheme and the predetermined uniform modulation scheme are not limited to the above listed modulation schemes.
Determining that the stitching module 30 is specifically configured to:
determining a first constellation diagram value corresponding to an original bit stream according to an original modulation mode constellation diagram;
determining a second constellation diagram value corresponding to the bit stream corresponding to the original bit stream according to a predetermined uniform modulation mode constellation diagram;
and dividing the first constellation diagram value by the second constellation diagram value to obtain a compensation coefficient.
For example, if the original modulation mode is QPSK and the predetermined unified modulation mode is 256QAM, according to the constellation diagram, the bit data under QPSK is 0, and the corresponding constellation value is
The corresponding bit data under 256QAM is 0101, and the corresponding constellation value is
The compensation factor is
Is divided by
To obtain a compensation coefficient of
Furthermore, it is determined that the splicing module 30 splices one compensation coefficient per resource block per transmission time interval, TTI, before the arrival of the bitstream data.
A conversion mapping module 32, configured to convert a bit stream of a user into a bit stream corresponding to a predetermined unified modulation mode, so as to obtain a premodulation bit stream, and perform layer mapping and data mapping on the premodulation bit stream;
a data modulation module 34, configured to modulate the pre-modulation bit stream after the layer mapping and the data mapping are performed by using a predetermined unified modulation manner, so as to obtain modulated data;
and the data processing module 36 is configured to obtain a compensation coefficient from the resource location, and multiply the modulated data by the compensation coefficient to obtain a data modulation result that is the same as the data modulation result of the user in the original modulation manner.
The data processing module 36 is specifically configured to:
and multiplying the compensation coefficient by the W weight at each transmission time interval TTI, and multiplying the obtained product by the modulated data.
The apparatus according to the embodiment of the present invention is suitable for the apparatus embodiment corresponding to the above method embodiment, and specific details of processing of each module may be understood with reference to the above method embodiment, which is not described herein again.
An embodiment of the present invention provides a base station data modulation apparatus, as shown in fig. 4, including: a memory 40, a processor 42 and a computer program stored on the memory 40 and executable on the processor 42, which computer program, when executed by the processor 42, carries out the following method steps:
step 101, determining a compensation coefficient according to an original modulation mode and a preset uniform modulation mode of a user, and splicing the compensation coefficient on a resource position allocated to the user; wherein, the original modulation mode specifically comprises: quadrature phase shift keying QPSK, 16quadrature amplitude modulation 16QAM, 64 quadrature amplitude modulation 64QAM, and 256 quadrature amplitude modulation 256QAM. In the embodiment of the present invention, the predetermined unified modulation method is: 256 phase quadrature amplitude modulation 256QAM. Of course, the source modulation scheme and the predetermined uniform modulation scheme are not limited to the above listed modulation schemes.
That is, in step 101, the modulated compensation coefficients need to be spliced according to the modulation scheme of the user and the allocated resource location.
In step 101, determining a compensation coefficient according to an original modulation mode of a user and a predetermined unified modulation mode specifically includes:
determining a first constellation diagram value corresponding to an original bit stream according to an original modulation mode constellation diagram;
determining a second constellation diagram value corresponding to the bit stream corresponding to the original bit stream according to a predetermined uniform modulation mode constellation diagram;
and dividing the first constellation diagram value by the second constellation diagram value to obtain a compensation coefficient.
For example, if the original modulation mode is QPSK and the predetermined unified modulation mode is 256QAM, according to the constellation diagram, the bit data under QPSK is 0, and the corresponding constellation value is
The corresponding bit data under 256QAM is 0101, and the corresponding constellation value is
The compensation factor is
Is divided by
To obtain a compensation coefficient of
In step 101, splicing the compensation coefficient to the resource location allocated to the user specifically includes: one compensation coefficient is spliced per resource block per transmission time interval, TTI, before the arrival of the bitstream data.
102, converting a bit stream of a user into a bit stream corresponding to a preset uniform modulation mode to obtain a premodulation bit stream, and performing layer mapping and data mapping on the premodulation bit stream;
that is, in step 102, it is necessary to convert bit streams of different modulation schemes into bit streams of a uniform modulation scheme, and the converted bit streams are referred to as pre-modulation bit streams. In the base station communication system, a 256QAM modulation scheme is preferable.
103, modulating the premodulation bit stream after layer mapping and data mapping by adopting a preset uniform modulation mode to obtain modulated data;
and step 104, acquiring a compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result adopted by the user in the original modulation mode. I.e. results consistent with the constellation lookup table in the protocol 3gpp TS 36.211 are obtained.
In step 104, multiplying the modulated data by the compensation factor specifically includes:
and multiplying the compensation coefficient by the W weight at each transmission time interval TTI, and multiplying the obtained product by the modulated data. That is, the processing of multiplying the compensation coefficient by the W weight in the offline case does not increase the amount of calculation in the online processing.
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor 42, implements the following method steps:
step 101, determining a compensation coefficient according to an original modulation mode and a preset uniform modulation mode of a user, and splicing the compensation coefficient on a resource position allocated to the user; wherein, the original modulation mode specifically comprises: quadrature phase shift keying QPSK, 16quadrature amplitude modulation 16QAM, 64 quadrature amplitude modulation 64QAM, and 256 quadrature amplitude modulation 256QAM. In the embodiment of the present invention, the predetermined unified modulation method is: 256 phase quadrature amplitude modulation 256QAM. Of course, the source modulation scheme and the predetermined unified modulation scheme are not limited to the above listed modulation schemes.
That is, in step 101, the modulated compensation coefficients need to be spliced according to the modulation scheme of the user and the allocated resource location.
In step 101, determining a compensation coefficient according to an original modulation mode of a user and a predetermined unified modulation mode specifically includes:
determining a first constellation diagram value corresponding to an original bit stream according to an original modulation mode constellation diagram;
determining a second constellation diagram value corresponding to the bit stream corresponding to the original bit stream according to a predetermined uniform modulation mode constellation diagram;
and dividing the first constellation diagram value by the second constellation diagram value to obtain a compensation coefficient.
For example, if the original modulation mode is QPSK and the predetermined unified modulation mode is 256QAM, according to the constellation diagram, the bit data under QPSK is 0, and the corresponding constellation value is
The corresponding bit data under 256QAM is 0101, and the corresponding constellation value is
The compensation factor is
Is divided by
To obtain a compensation coefficient of
In step 101, splicing the compensation coefficient to the resource location allocated to the user specifically includes: before the arrival of the bit stream data, one compensation coefficient is spliced in each resource block of each transmission time interval TTI.
102, converting a bit stream of a user into a bit stream corresponding to a preset uniform modulation mode to obtain a premodulation bit stream, and performing layer mapping and data mapping on the premodulation bit stream;
that is, in step 102, it is necessary to convert bit streams of different modulation schemes into bit streams of a uniform modulation scheme, and the converted bit streams are referred to as pre-modulation bit streams. In the base station communication system, a 256QAM modulation scheme is preferable.
103, modulating the premodulation bit stream after layer mapping and data mapping by adopting a preset uniform modulation mode to obtain modulated data;
and 104, acquiring a compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result of the user in the original modulation mode. Namely, the result consistent with the constellation map table look-up in the protocol 3GPP TS 36.211 is obtained.
In step 104, multiplying the modulated data by the compensation factor specifically includes:
and multiplying the compensation coefficient by the W weight at each transmission time interval TTI, and multiplying the obtained product by the modulated data. That is, the processing of multiplying the compensation coefficient by the W weight in the offline case does not increase the amount of calculation in the online processing.
The computer-readable storage medium of this embodiment includes, but is not limited to: ROM, RAM, magnetic or optical disks, and the like.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A method for modulating data in a base station, comprising:
determining a compensation coefficient according to an original modulation mode and a preset uniform modulation mode of a user, and splicing the compensation coefficient on a resource position allocated to the user;
converting a bit stream of a user into a bit stream corresponding to a preset uniform modulation mode to obtain a pre-modulation bit stream, and performing layer mapping and data mapping on the pre-modulation bit stream;
modulating the pre-modulation bit stream subjected to layer mapping and data mapping by adopting the preset uniform modulation mode to obtain modulated data;
acquiring the compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result of the user in the original modulation mode;
wherein, the determining the compensation coefficient according to the original modulation mode and the predetermined unified modulation mode of the user specifically comprises:
determining a first constellation diagram value corresponding to an original bit stream according to an original modulation mode constellation diagram;
determining a second constellation diagram value corresponding to the bit stream corresponding to the original bit stream according to a predetermined uniform modulation mode constellation diagram;
dividing the first constellation value by the second constellation value to obtain the compensation coefficient;
wherein the splicing the compensation coefficient to the resource location allocated to the user specifically includes:
before the arrival of the bit stream data, one compensation coefficient is spliced in each resource block of each transmission time interval TTI.
2. The method of claim 1, wherein the original modulation scheme specifically comprises: quadrature phase shift keying QPSK, 16quadrature amplitude modulation 16QAM, 64 quadrature amplitude modulation 64QAM, and 256 quadrature amplitude modulation 256QAM.
3. The method of claim 1, wherein the predetermined uniform modulation scheme is: 256 phase quadrature amplitude modulation 256QAM.
4. The method of claim 1, wherein multiplying the modulated data by the compensation factor specifically comprises:
and multiplying the compensation coefficient by the W weight at each transmission time interval TTI, and multiplying the obtained product by the modulated data.
5. A base station data modulation device is arranged in a base station, and is characterized in that the device specifically comprises:
the determining and splicing module is used for determining a compensation coefficient according to an original modulation mode and a preset unified modulation mode of a user and splicing the compensation coefficient on a resource position allocated to the user;
the conversion mapping module is used for converting the bit stream of the user into the bit stream corresponding to the preset uniform modulation mode to obtain a pre-modulation bit stream, and performing layer mapping and data mapping on the pre-modulation bit stream;
the data modulation module is used for modulating the pre-modulation bit stream subjected to the layer mapping and the data mapping by adopting the preset uniform modulation mode to obtain modulated data;
the data processing module is used for acquiring the compensation coefficient from the resource position, and multiplying the modulated data by the compensation coefficient to obtain a data modulation result which is the same as the data modulation result of the user in the original modulation mode;
wherein, the determining the compensation coefficient according to the original modulation mode and the predetermined unified modulation mode of the user specifically comprises:
determining a first constellation diagram value corresponding to an original bit stream according to an original modulation mode constellation diagram;
determining a second constellation diagram value corresponding to the bit stream corresponding to the original bit stream according to a predetermined uniform modulation mode constellation diagram;
dividing the first constellation value by the second constellation value to obtain the compensation coefficient;
wherein the splicing the compensation coefficient to the resource location allocated to the user specifically includes:
before the arrival of the bit stream data, one compensation coefficient is spliced in each resource block of each transmission time interval TTI.
6. The apparatus of claim 5, wherein the original modulation scheme specifically comprises: quadrature phase shift keying QPSK, 16quadrature amplitude modulation 16QAM, 64 quadrature amplitude modulation 64QAM, and 256 quadrature amplitude modulation 256QAM.
7. A base station data modulation apparatus, comprising: memory, processor and computer program stored on the memory and executable on the processor, which computer program, when being executed by the processor, carries out the steps of the base station data modulation method according to any one of claims 1 to 4.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the base station data modulation method according to any one of claims 1 to 4.
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