CN111385074B - Reference signal processing method and device - Google Patents
Reference signal processing method and device Download PDFInfo
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- CN111385074B CN111385074B CN201811626636.1A CN201811626636A CN111385074B CN 111385074 B CN111385074 B CN 111385074B CN 201811626636 A CN201811626636 A CN 201811626636A CN 111385074 B CN111385074 B CN 111385074B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention provides a reference signal processing method and a device, wherein the method comprises the following steps: and taking the RE block as a unit, carrying out scrambling treatment on the first pilot sequence covered by the orthogonal code to generate a second pilot sequence. In the invention, because the pilot frequency sequence covered by the orthogonal code is subjected to scrambling treatment, the interference residual part is disturbed by high frequency and is easy to cancel or inhibit in the subsequent filtering, thus improving the performance of channel estimation.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and apparatus for processing a reference signal.
Background
Demodulation reference signals (Demodulation Reference Signal, DMRS) are important reference signals in a 4G system or an NR (New Radio) system, and the design or processing of DMRS directly relates to the performance of channel estimation.
For example, in the NR system, when DMRS time-frequency resources are configured on a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH), the 4 th and 11 th orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbols in 1 slot (slot) may be selected, and the DMRS time-frequency resources may be configured according to NR standard Type 2. Also, the sequence carried on the DMRS resource is selected to be a complex sequence, the real part or the imaginary part of the complex sequence is a Pseudo-Noise (PN) sequence, and an initialization sequence of the PN sequence is related to the cell ID.
Taking NR standard Type 2 as an example, each comb can multiplex 4 User Equipments (UEs) simultaneously at maximum, and 3 comb can multiplex 12 UEs simultaneously at maximum. For example, the DMRSs of 4 UEs in comb0 are scrambled by orthogonal cover codes (Orthogonal Cover Code, OCC) and then orthogonal to each other, and the channel values of each UE can be separated by orthogonal cover code combining.
In some special multi-user scenarios, for example, when the time offset effect is large, or when the multiplexing UE has obvious far-near effect, if DMRS is designed and processed according to the conventional method, even if there is no inter-cell interference, the receiver will have interference residues when doing orthogonal cover code combining, so that the performance of channel estimation can be obviously affected.
Disclosure of Invention
The embodiment of the invention provides a reference signal processing method and a reference signal processing device, which are used for at least solving the problem that the design of a DMRS influences the channel estimation performance in certain scenes in the related technology.
According to an embodiment of the present invention, there is provided a reference signal processing method including: and scrambling the first pilot sequence covered by the orthogonal code by taking a Resource Element (RE) block as a unit to generate a second pilot sequence.
According to still another embodiment of the present invention, there is provided a reference signal transmitting apparatus including: the processing module is used for carrying out scrambling processing on the first pilot sequence covered by the orthogonal code by taking the RE block as a unit to generate a second pilot sequence; and the transmitting module is used for transmitting the second pilot sequence.
According to another embodiment of the present invention, there is provided a reference signal receiving apparatus including: the receiving module is used for receiving a second pilot frequency sequence, wherein the second pilot frequency sequence is generated by taking an RE block as a unit and scrambling the first pilot frequency sequence covered by the orthogonal code; and the acquisition module is used for acquiring a channel value according to the second pilot frequency sequence.
Wherein one of the RE blocks consists of 4 REs, including 2 symbols in the time domain and 2 adjacent subcarriers in the frequency domain.
According to a further embodiment of the invention, there is also provided a storage medium having stored therein a computer program, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
According to a further embodiment of the invention, there is also provided an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
In the above embodiment of the present invention, since the pilot sequence covered by the orthogonal code is scrambled, the interference residual part is scrambled by high frequency and is easily cancelled or suppressed during subsequent filtering, so that the performance of channel estimation can be improved.
Drawings
FIG. 1 is a block diagram of a mobile terminal operated in accordance with a method of an embodiment of the present invention;
FIG. 2 is a flow chart of a reference signal processing method according to an embodiment of the invention;
fig. 3 is a Type 1 pilot pattern in 1 physical resource block (Physical Resource Block, PRB) according to an embodiment of the present invention;
fig. 4 is a second pilot sequence generation flow chart according to the first embodiment of the present invention;
fig. 5 is a schematic diagram of a grid (time-frequency pilot block) according to an embodiment of the invention;
fig. 6 is a schematic diagram of RE block pilots being scrambled according to an embodiment of the invention;
fig. 7 is a Type 2 pilot pattern in 1 PRB according to an embodiment of the present invention;
fig. 8 is a Type 3 pilot pattern in 1 PRB according to an embodiment of the present invention;
fig. 9 is a second pilot sequence generation flow chart according to a seventh embodiment of the present invention;
fig. 10 is a schematic structural view of a reference signal transmitting apparatus according to an alternative embodiment of the present invention;
fig. 11 is a schematic structural view of a reference signal receiving apparatus according to an alternative embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The method embodiment provided by the embodiment of the invention can be executed in the mobile terminal or the base station. Taking the mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of the mobile terminal according to an embodiment of the present invention. As shown in fig. 1, the mobile terminal 10 may include one or more (only one is shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data, as well as a transmission component 106 for data signal transmission. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative and not limiting of the structure of the mobile terminal described above. For example, the mobile terminal 10 may also include more or fewer components than shown in FIG. 1 or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a reference signal processing method in an embodiment of the present invention, and the processor 102 executes the computer program stored in the memory 104 to perform various functional applications and data processing, that is, implement the above-mentioned method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmitting unit 106 is configured to transmit data via an antenna transmitting unit. The transmitting unit 106 may be a Radio Frequency (RF) module, which is used to communicate with the base station wirelessly.
In this embodiment, a reference signal processing method operating on the mobile terminal is provided, and fig. 2 is a flowchart of a reference signal processing method according to an embodiment of the present invention, as shown in fig. 2, where the flowchart includes the following steps:
step S102, scrambling the first pilot sequence covered by the orthogonal code by taking RE block as a unit to generate a second pilot sequence; the orthogonal code coverage may be to orthogonalize the first pilot sequence by multiplying the first pilot sequence with an orthogonal cover code.
Step S104, transmitting the second pilot sequence.
Before step S102 in the foregoing embodiment, the method may further include: and generating the first pilot sequence according to a New air interface (NR) ZC (Zadoff-Chu) or PN sequence, and performing orthogonal code coverage on the first pilot sequence.
In the above-described embodiment, one of the RE blocks is composed of a plurality of REs, for example, one of the RE blocks may be composed of 4 REs including 2 symbols in the time domain and 2 subcarriers adjacent in the frequency domain, and such an RE block composed of 4 REs is referred to as a field RE block in the following description of the present invention.
In step S102 of the above embodiment, the second pilot sequence may be scrambled with a scrambling sequence of one of the following: PN sequence, walsh sequence, user equipment specific sequence (UE specific) sequence. For example, elements in the scrambling sequence may be used to respectively point multiply corresponding RE blocks in the first pilot sequence, e.g., assuming the scrambling sequence includes elements r1, r2, … …, ri, where the point multiplication is r 1 Multiplying the corresponding 1 st RE block, r 2 Multiplied by the corresponding 1 st RE block … … r i Multiplied by the corresponding ith RE block, etc. The length of the scrambling sequence is the number of subcarriers of the first pilot sequence divided by the number of subcarriers of the RE block.
In the above embodiment, the first pilot sequence may be an all 1 sequence, or the first pilot sequence may be a non-cell-specific sequence.
Alternatively, the main body of execution of the above steps may be a base station or a terminal, etc., but is not limited thereto.
The technical solution provided by the present invention will be further described through a plurality of embodiments.
Example 1
In the present embodiment, in one uplink system, a plurality of UEs share PUSCH transmission data. Assume that the pilots (e.g., DMRS ports) used by each UE are different and that the uplink waveform employs a DFT-S-OFDM waveform. In this embodiment, the time-frequency pattern of the pilot uses the NR Type 1 pattern as shown in fig. 3.
As shown in fig. 4, the pilot sequence generation method (including the orthogonal code coverage) of the present embodiment includes the following steps:
s402, generating a first pilot sequence according to an NR ZC sequence;
s404, the first pilot sequence is covered by the orthogonal code, and the first pilot sequence covered by the orthogonal code is obtained;
s406, taking RE block as a unit, scrambling the first pilot sequence covered by the orthogonal code by using the UE-specific sequence to obtain a second pilot sequence. Wherein the RE block may be a field grid RE block.
Let 1 field lattice (time-frequency pilot block) be denoted as [ Xn k ]For example, [ Xn ] as shown in FIG. 5 k ]For 4 REs, comprising 2 time domain symbols, 2 subcarriers.
In this embodiment, the UE-specific sequence length is the number of pilot subcarriers divided by 2, and the UE-specific sequence may be a sequence determined by ue_id, a sequence determined by C-RNTI, or other UE-specific sequences.
In step S402 of this embodiment, the NR ZC sequence may be used as the first pilot sequence, and then the pilot is scrambled.
In addition, in the above scheme, after scrambling the first pilot sequence, the first pilot sequence may be covered by an orthogonal code.
In this embodiment, as shown in FIG. 6, the UE-specific sequence is the sequence [ r ] 1 ,r 2 ,r 3 ,r 4 ,r 5 ,r 6 ,...,r 11 ,r 12 ] T For the pilot scrambling sequence of UE1, the first pilot sequence covered by the above orthogonal code is scrambled with this scrambling sequence.
Specifically, as shown in fig. 6, in the scenario that the time-frequency resource of UE1 is 12 PRBs, tian Zige (RE block) pilots covered by each orthogonal code of UE1 are scrambled, that is, tian Zige (RE block) pilots covered by each orthogonal code are multiplied by a corresponding element in the pilot scrambling sequence, more specifically, for example, the first pilot sequence elements covered by 4 orthogonal codes carried by Tian Zige (RE block) pilots covered by the first orthogonal code are multiplied by r 1 The first pilot sequence elements covered by 4 orthogonal codes carried by Tian Zige (RE block) pilot covered by the second orthogonal code are multiplied by r 2 And so on until the last first pilot sequence element is multiplied by r 12 。
By adopting the technical scheme provided by the embodiment, because the pilot sequence covered by the orthogonal code is subjected to scrambling treatment, the interference residual part can be disturbed by high frequency, and is easy to cancel or inhibit in the subsequent filtering, so that the channel estimation performance can be improved when the receiver performs channel estimation.
Example two
The present embodiment is similar to the embodiment in that in the present embodiment, the time-frequency pattern of the pilot frequency adopts an NR Type 2 pattern as shown in fig. 7.
The sequence generation method (including orthogonal code coverage) of the present embodiment is also similar to the embodiment, and includes:
s1, generating a first pilot sequence according to an NR ZC sequence,
s2, the first pilot frequency sequence is covered by the orthogonal code to obtain the first pilot frequency sequence covered by the orthogonal code,
s3, taking the field check RE block as a unit, and scrambling the first pilot sequence covered by the orthogonal code by using the UE-specific sequence to obtain a second pilot sequence.
It should be noted that, in the above scheme provided in this embodiment, an NR ZC sequence may be used as a pilot sequence, and the pilot sequence may be scrambled.
In addition, the scheme may be that the first pilot sequence is scrambled and then the orthogonal code is covered.
Example III
The present embodiment is similar to the above embodiment, except that in the present embodiment, the time-frequency pattern of the pilot frequency adopts the NR Type 3 pattern as shown in fig. 8.
The sequence generation manner (including orthogonal code coverage) of this embodiment is also similar to the above embodiment, and will not be described here.
It should be noted that, although the embodiment of the present invention takes NR Type 1, NR Type 2, and NR Type 3 pilot patterns as examples, the sequence generation method/pilot processing method of the pilot pattern provided in the embodiment of the present invention is applicable to other pilot patterns, that is, as long as the scrambling code is performed by using the pilot block (more than 1 RE) as a basic unit, for example, 1 pilot block is a field (4 REs), or 2 REs, or 6 REs, etc.
Example IV
This embodiment is similar to the above embodiment in that the first pilot sequence covered with the orthogonal code is scrambled with the UE-specific sequence in units of Tian Zige (RE block).
In this embodiment, the sequence elements may be: {1, -1}, or {1, j, -1, -j }, or other UE-specific sequence.
The sequence length is as follows: UE pilot subcarrier number/N. Wherein, N is the number of sub-carriers of RE blocks. For example, of the 12 PRBs, the UE pilot subcarriers are 24 in number, and the RE block is a field lattice, and the scrambling sequence length is 24/2=12.
In one embodiment, the scrambling sequence employed is a base station known sequence.
Furthermore, the scrambling sequence may also be a PN sequence, or a Hadamard sequence.
Example five
Unlike the above-described embodiments, in this embodiment, pilots (e.g., DMRS ports) used by a plurality of UEs may be identical, i.e., there is a pilot collision. In this embodiment, the first pilot sequence covered by the orthogonal code is scrambled with the UE-specific sequence in units of field RE blocks. The sequence generation method of this embodiment is also similar to that of the embodiment, and will not be described here.
The scheme can improve the performance in the scene, because the sequence scrambling code special for the UE is adopted, even if pilot frequency collides, different UE pilot frequencies can be separated through the scrambling code sequence of the UE-specific. In other words, the receiver can separate out the channel values of different UEs by descrambling the received pilot sequence.
Example six
In this embodiment, the uplink waveform uses an OFDM waveform, and the time-frequency pattern of the pilot uses an NR Type 1 pattern.
The sequence generation method of the present embodiment is similar to that of the embodiment, and includes:
s1, generating a first pilot sequence according to an NR PN sequence;
s2, the first pilot frequency sequence is covered by the orthogonal code, and the first pilot frequency sequence covered by the orthogonal code is obtained;
s3, taking the field check RE block as a unit, and scrambling the first pilot sequence covered by the orthogonal code by using the UE-specific sequence to obtain a second pilot sequence.
Similar to the previous embodiments, in this embodiment, 1 field lattice (time-frequency pilot block) is assumed to be represented asFor example, as shown in FIG. 5 +.>For 4 REs, comprising 2 time domain symbols, 2 subcarriers.
Example seven
In this embodiment, in a multi-cell scenario, the DMRS sequence of the UE is a full 1 sequence, and the time-frequency pattern of the pilot frequency adopts an NR Type 1 pattern.
As shown in fig. 9, the sequence generation method (including the process of orthogonal code coverage) of the present embodiment includes the steps of:
s902, generating a first pilot sequence with sequence elements of all 1, or generating a sequence with the first pilot sequence of non-cell-specific;
s904, the first pilot frequency sequence is covered by the orthogonal code, and the first pilot frequency sequence covered by the orthogonal code is obtained;
s906, taking the field check RE block as a unit, scrambling the first pilot sequence covered by the orthogonal code by using the UE-specific sequence to obtain a second pilot sequence.
In the present embodiment, it is assumed that 1 field lattice (time-frequency pilot block) is expressed asFor example, as shown in FIG. 5 +.>For 4 REs, comprising 2 time domain symbols, 2 subcarriers.
Example eight
In this embodiment, the technical solution provided by the present invention is described in detail from the perspective of the system receiver. In this embodiment, the receiver receives the scrambled OCC pilot sequence, and separates the user channel value by combining the scrambled OCCs, and then obtains the complete channel value by filtering and interpolation.
When the time bias influence is large or the multiplexing UE has obvious far and near effects, if the technical scheme provided by the embodiment is adopted, the interference residual part of the system receiver can be disturbed by high frequency when the OCC after scrambling is combined, and the interference residual part is easy to cancel/inhibit during subsequent filtering, so that the performance of channel estimation under the scene can be obviously improved.
In an embodiment, for a massive machine-type huan-type communication (massive Machine Type Communication, mctc) scenario, assuming that the maximum time offset is 0.5×cp, the wireless channel is a TDL-C channel, the receiver separates the user channel values by combining the "scrambled OCC", and then obtains the complete channel values by wiener filtering. The 'OCC after scrambling' combination means that the received signal matrix is summed after multiplying the OCC matrix after scrambling. In this embodiment, the scrambled OCC code matrix refers to a scrambling symbol pixel multiplied by the OCC code matrix. In this embodiment, the channel estimation performance of the system receiver can be improved.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
In this embodiment, a reference signal transmitting device is further provided, and the reference signal transmitting device is used to implement the foregoing embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
Fig. 10 is a block diagram of a reference signal transmitting apparatus according to an embodiment of the present invention, which includes a processing module 20 and a transmitting module 30 as shown in fig. 10.
The processing module 20 is configured to perform scrambling processing on the first pilot sequence covered by the orthogonal code by taking the RE block as a unit to generate a second pilot sequence.
And the transmitting module 30 is configured to transmit the second pilot sequence generated after the scrambling process.
Fig. 11 is a block diagram of a reference signal receiving apparatus according to an embodiment of the present invention, which includes a receiving module 40 and an acquiring module 50 as shown in fig. 11.
The receiving module 40 is configured to receive a second pilot sequence, where the second pilot sequence is generated by scrambling a first pilot sequence covered by an orthogonal code with an RE block as a unit.
The obtaining module 50 is configured to obtain a channel value according to the second pilot sequence.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
An embodiment of the invention also provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing a computer program.
An embodiment of the invention also provides an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may alternatively be implemented in program code executable by computing devices, so that they may be stored in a memory device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method of reference signal processing, comprising:
scrambling the first pilot sequence covered by the orthogonal code by taking the resource element RE block as a unit to generate a second pilot sequence;
wherein, the scrambling process is to adopt elements in a scrambling sequence to respectively dot multiply corresponding RE blocks in the first pilot sequence;
wherein, one RE block consists of 4 RE, which comprises 2 symbols on the time domain and 2 adjacent sub-carriers on the frequency domain;
the scrambling processing for the first pilot frequency sequence covered by the orthogonal code comprises the following steps:
scrambling the first pilot sequence with a scrambling sequence that is one of: PN sequence, walsh sequence, UE specific sequence special for user equipment; the length of the scrambling sequence is the number of subcarriers of the first pilot sequence divided by the number of subcarriers of the RE block.
2. The method of claim 1, further comprising, prior to scrambling the first pilot sequence after orthogonal code coverage:
generating the first pilot sequence according to the NR ZC or PN sequence;
and performing orthogonal code coverage on the first pilot frequency sequence.
3. The method of claim 1, wherein the first pilot sequence is a full 1 sequence or the first pilot sequence is a non-cell-specific sequence.
4. The method of claim 1, wherein scrambling the first pilot sequence after orthogonal code coverage to generate a second pilot sequence further comprises:
the second pilot sequence is transmitted by a transmitter.
5. A method of reference signal processing, comprising:
receiving a second pilot sequence, wherein the second pilot sequence is generated by taking RE blocks as units and carrying out scrambling treatment on a first pilot sequence covered by an orthogonal code, and the scrambling treatment is to adopt elements in the scrambling sequence to respectively dot-multiply corresponding RE blocks in the first pilot sequence;
obtaining a channel value according to the second pilot frequency sequence;
wherein, one RE block consists of 4 RE, which comprises 2 symbols on the time domain and 2 adjacent sub-carriers on the frequency domain;
wherein the first pilot sequence is scrambled by a scrambling sequence selected from the group consisting of: PN sequence, walsh sequence, UE specific sequence special for user equipment; the length of the scrambling sequence is the number of subcarriers of the first pilot sequence divided by the number of subcarriers of the RE block.
6. A reference signal transmitting apparatus, comprising:
the processing module is used for carrying out scrambling processing on the first pilot sequence covered by the orthogonal code by taking the RE block as a unit to generate a second pilot sequence, wherein the scrambling processing is to adopt elements in the scrambling sequence to respectively dot-multiply corresponding RE blocks in the first pilot sequence;
a transmitting module, configured to transmit the second pilot sequence;
wherein, one RE block consists of 4 RE, which comprises 2 symbols on the time domain and 2 adjacent sub-carriers on the frequency domain;
wherein the first pilot sequence is scrambled by a scrambling sequence selected from the group consisting of: PN sequence, walsh sequence, UE specific sequence special for user equipment; the length of the scrambling sequence is the number of subcarriers of the first pilot sequence divided by the number of subcarriers of the RE block.
7. The apparatus as recited in claim 6, further comprising:
a generation module, configured to generate the first pilot sequence according to an NR ZC or PN sequence;
and the orthogonal code coverage module is used for carrying out orthogonal code coverage on the first pilot frequency sequence.
8. A reference signal receiving apparatus, comprising:
the receiving module is used for receiving a second pilot frequency sequence, wherein the second pilot frequency sequence is generated by taking an RE block as a unit and carrying out scrambling treatment on a first pilot frequency sequence covered by an orthogonal code, and the scrambling treatment is to adopt elements in the scrambling sequence to respectively dot-multiply corresponding RE blocks in the first pilot frequency sequence;
the acquisition module is used for acquiring a channel value according to the second pilot frequency sequence;
wherein, one RE block consists of 4 RE, which comprises 2 symbols on the time domain and 2 adjacent sub-carriers on the frequency domain;
wherein the first pilot sequence is scrambled by a scrambling sequence selected from the group consisting of: PN sequence, walsh sequence, UE specific sequence special for user equipment; the length of the scrambling sequence is the number of subcarriers of the first pilot sequence divided by the number of subcarriers of the RE block.
9. A storage medium having a computer program stored therein, wherein the computer program is arranged to perform the method of any of claims 1 to 5 when run.
10. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of any of the claims 1 to 5.
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| CN201811626636.1A CN111385074B (en) | 2018-12-28 | 2018-12-28 | Reference signal processing method and device |
| PCT/CN2019/124339 WO2020135027A1 (en) | 2018-12-28 | 2019-12-10 | Reference signal processing method and device |
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| CN201811626636.1A CN111385074B (en) | 2018-12-28 | 2018-12-28 | Reference signal processing method and device |
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| WO2020135027A1 (en) | 2020-07-02 |
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