CN110474860A - A kind of OFDM baseband signal generation method and device - Google Patents
A kind of OFDM baseband signal generation method and device Download PDFInfo
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- CN110474860A CN110474860A CN201810451292.9A CN201810451292A CN110474860A CN 110474860 A CN110474860 A CN 110474860A CN 201810451292 A CN201810451292 A CN 201810451292A CN 110474860 A CN110474860 A CN 110474860A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
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Abstract
The embodiment of the present invention provides a kind of OFDM baseband signal generation method and device, is related to the communications field, to solve the problems, such as phase deviation existing for existing OFDM baseband signal.This method comprises: obtaining the difference between first frequency and second frequency；Wherein, first frequency is the centre frequency of the frequency bandwidth for the public resource block that first resource is concentrated, first resource collection is mapped in M OFDM symbol, the corresponding OFDM baseband signal of one OFDM symbol, the first OFDM baseband signal are an OFDM baseband signal corresponding with the first OFDM symbol in M OFDM baseband signal；According to difference and the corresponding time-domain information of the first OFDM symbol, the corresponding phase pushing figure of the first OFDM baseband signal is determined；According to the data symbol of the resource particle carried on phase pushing figure and the first OFDM symbol, the first OFDM baseband signal is generated.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of orthogonal frequency division multiplexing (Orthogonal Frequency
Division Multiplexing, OFDM) baseband signal generation method and device.
Background technique
Currently, in 5G NR system, the subcarrier spacing SCS of the public resource block (Common RB) carried on carrier wave
(subcarrier spacing) can be set to 15* (2^n) kHz, and wherein n can take negative.That is, in NR system
In, SCS can be set to: 3.75kHz, 7.5kHz, 15kHz, 30kHz, 60kHz, 120kHz, 240kHz etc..Meanwhile existing 5G
NR system is supported the OFDM baseband signal of different SCS in same carrier wave while being sent, i.e., can dispose difference on same carrier wave
SCS resource.
However, since integral multiple relation is not fully presented in the SCS for the multiple resources disposed on same carrier wave between any two,
Therefore, the centre frequency of the resource of the different SCS disposed on same carrier wave is very big may not be identical.
Due to not accounting for the different SCS's disposed on same carrier wave in existing OFDM baseband signal generating process
The centre frequency of resource is different, and so as to cause the OFDM baseband signal of generation, there may be phase offsets, and then lead to transmitting terminal
Equipment can not be corresponding with same frequency is upconverted to by the OFDM modulates baseband signals of the different SCS sent simultaneously on same carrier wave
Target frequency position.
Summary of the invention
The embodiment of the present invention provides a kind of OFDM baseband signal generation method and device, to solve existing OFDM base band
Existing for signal the problem of phase deviation.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows:
In a first aspect, the embodiment of the invention provides a kind of OFDM baseband signal generation methods, this method comprises:
Obtain the difference between first frequency and second frequency；Wherein, the first frequency is the public of first resource concentration
The centre frequency of the frequency bandwidth of resource block, the first resource collection are mapped in M OFDM symbol, and an OFDM symbol is corresponding
One OFDM baseband signal, the first OFDM baseband signal be the M OFDM baseband signal in the first OFDM symbol pair
The OFDM baseband signal answered；
According to the difference and the corresponding time-domain information of first OFDM symbol, the first OFDM base band letter is determined
Number corresponding phase pushing figure；
According to the data symbol of the resource particle carried on the phase pushing figure and first OFDM symbol, generate
The first OFDM baseband signal.
Second aspect, the embodiment of the invention provides a kind of OFDM baseband signal generating means, comprising:
Module is obtained, for obtaining the difference between first frequency and second frequency；Wherein, the first frequency is the first money
The centre frequency of the frequency bandwidth for the public resource block that source is concentrated, the first resource collection are mapped in M OFDM symbol, and one
OFDM symbol corresponds to an OFDM baseband signal, and the first OFDM baseband signal is in the M OFDM baseband signal with the
The corresponding OFDM baseband signal of one OFDM symbol；
Determining module, the difference and first OFDM symbol for being obtained according to the acquisition module are corresponding
Time-domain information determines the corresponding phase pushing figure of the first OFDM baseband signal；
Generation module, the phase pushing figure and first OFDM symbol for being determined according to the determining module
The data symbol of the resource particle of upper carrying generates the first OFDM baseband signal.
The third aspect, the embodiment of the invention provides a kind of OFDM baseband signal generating means, including processor, memory
And it is stored in the computer program that can be run on the memory and on the processor, which is executed by the processor
The step of Shi Shixian method as described in relation to the first aspect.
Fourth aspect, the embodiment of the invention provides a kind of computer readable storage medium, the computer-readable storage mediums
The step of storing computer program in matter, method as described in relation to the first aspect realized when which is executed by processor.
In embodiments of the present invention, during generating OFDM baseband signal, the embodiment of the present invention is according to first resource
Frequency difference and first resource collection between the centre frequency and the second frequency of the frequency bandwidth of the public resource block of concentration are mapped
M OFDM symbol on any OFDM symbol time-domain information, the phase pushing figure of the OFDM symbol is determined, thus to
Difference on the frequency between the centre frequency and the second frequency of the frequency bandwidth of public resource block in one resource set carries out phase compensation, to protect
The boundary alignment of the public resource block of different sub-carrier interval transmission is demonstrate,proved, it can there are phases to avoid the OFDM baseband signal of generation
Deviation, so as to improve the efficiency of communication.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of possible structural schematic diagram of communication system involved in the embodiment of the present invention；
Fig. 2 is a kind of flow diagram one of OFDM baseband signal generation method provided in an embodiment of the present invention；
Fig. 3 is a kind of one of structural schematic diagram of OFDM baseband signal generating means provided in an embodiment of the present invention；
Fig. 4 is a kind of second structural representation of OFDM baseband signal generating means provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Part term involved in the present invention is explained below, is understood with helping reader:
1, (SSB is alternatively referred to as synchronization signal block (Synchronisation signal&PBCH Block, SSB): SS
block)
One SSB occupies continuous 4 OFDM symbols in time, occupies continuous 20*12 subcarrier on frequency domain,
In include primary synchronization signal (Primary Syncronization Signal, PSS), secondary synchronization signal (Secondary
Syncronization Signal, SSS) and physical broadcast signal (Physical Broadcast Channel, PBCH),
PBCH-DMRS.In addition, the starting point of first subcarrier of SSB can not be transmit the SSB first Common RB it is (public
Resource block) boundary, i.e. the first of SSB subcarrier can carry with first son for first Common RB for transmitting the SSB
There are frequency intervals between wave.
2, the generating process of existing OFDM baseband signal:
1), with other letters except Physical Random Access Channel (Physical Random Access Channel, PRACH)
Number OFDM baseband signal generating process for, l OFDM time domain baseband signals in a subframeGeneration formula such as
Under:
Wherein, p is the port numbering of signal, and t is the sampling time, μ be subcarrier spacing (Subcarrier Spacing,
SCS configuration information), Δ f indicate the SCS when configuration information of SCS is μ, and k is subcarrier number,For indicating that bandwidth provides
RB number in source,For indicating the subcarrier number in a RB,For indicating when the configuration information of SCS is μ,
The circulating prefix-length of first of OFDM symbol.T in above-mentioned formula 1c=1/ (Δ fmax·Nf), wherein Δ fmax=480
103Hz, Nf=4096.The value range of t are as follows:When on the p of port, to correspond to SCS configuration μ
First of OFDM symbol, the symbol on k-th of subcarrier.
It is as follows for the start time point of first of OFDM in the case where the configuration information of SCS is μ:
Wherein, the corresponding SCS of each μ value is as shown in table 1 below:
| μ | Δ f=2μ·15 |
| 0 | 15 |
| 1 | 30 |
| 2 | 60 |
| 3 | 120 |
| 4 | 240 |
| …… | …… |
Table 1
Wherein, above-mentionedIt is indicated by high-level signaling k0, is provided in existing agreement, in existing OFDM baseband signal
In generating process, need to guarantee that the subcarrier 0 in all Common RB transmitted on same carrier wave with different SCS is aligned,
The boundary of all Common RB under i.e. same carrier wave needs to be aligned.
2), for PRACH, l OFDM time domain baseband signals OFDM time domain baseband signals in a subframeLife
It is as follows at formula:
K=Δ f/ Δ fRA(formula 4)；
Wherein, p is the port numbering of signal, and t is the sampling time, and μ is the configuration information of SCS, and Δ f indicates the configuration of SCS
SCS when information is μ, Δ f indicate ascender bandwidth (the initial active of the initial activation where PRACH resource
Uplink bandwidth part) or PRACH resource where activation ascender bandwidth (active uplink
Bandwidth part) SCS.K is subcarrier number.
Indicate the number of sub carrier wave of protection interval, unit is Δ fRA。
For indicating when the configuration information of SCS is μ, the circulating prefix-length of first of OFDM symbol.
T in above-mentioned formula 3c=1/ (Δ fmax·Nf), wherein Δ fmax=480103Hz, Nf=4096.
For the symbol on k-th of subcarrier on the p of port, for sending PRACH preamble.For table
Show that configuration information is RB number in μ Time Bandwidth resource,For indicating the subcarrier number in a RB.
ΔfRAIndicate SCS of the PRACH on frequency domain.
Indicate initial access phase by the ascender of the high-level signaling initial-UL-BWP initial activation obtained
The Common RB of lowest number in bandwidth；Otherwise,Indicate the ascending part by the high-level signaling UL-BWP activation obtained
Divide the Common RB of lowest number in bandwidth.
Indicate initial access phase by high-level signaling (msg1- relevant with initial activation ascender bandwidth
Frequency Start) instruction frequency domain on PRACH transmission opportunity (PRACH transmission occasion) and first
The frequency shift (FS) between PRB0 begun in activation ascender bandwidth；Otherwise,Indicate relevant with activation ascender bandwidth
The minimum PRACH transmission of frequency on the frequency domain of high-level signaling (msg1-Frequency Start) instruction
The frequency shift (FS) between PRB0 on occasion and activation ascender bandwidth.
nRAIt indicates on some time point (time instance refers to the time domain length of a PRACH transmission opportunity)
Number of the PRACH transmission occasion on frequency domain.
Indicate what accidental access signal frequency domain occupied, the number of the RB based on PUSCH SCS.
For FR1, Δ fRA∈ { 1.25,5,15,30 } kHz, at this timeIndicate PRACH preamble in a subframe
Initial position.For FR2, Δ fRA∈ { 60,120 } kHz, at this timeIndicate that PRACH preamble is in a SCS
Initial position in the time slot of 60kHz.
LRAAnd NuThe ZC sequence length for respectively indicating Preamble and the time span after mapping.
Indicate CP length, in which:
As Δ fRAWhen ∈ { 1.25,5 } kHz, n=0；
As Δ fRAWhen ∈ { 15,30,60,120 } kHz, n is indicatedInclude in interval
The number of the primary sign of the field of 0.5ms.
Wherein, above-mentionedIt is indicated by high-level signaling k0, is provided in existing agreement, in existing OFDM baseband signal
In generating process, need to guarantee that the subcarrier 0 in all Common RB disposed on same carrier wave with different SCS is aligned,
The boundary of all Common RB under i.e. same carrier wave needs to be aligned.
3, relational language
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, herein
Middle character "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or"；In formula, character "/" indicates forward-backward correlation
Object is the relationship of a kind of " being divided by ".If explanation is not added, " multiple " herein refer to two or more.
For the ease of clearly describing the technical solution of the embodiment of the present invention, in an embodiment of the present invention, use " the
One ", the printed words such as " second " distinguish function or the essentially identical identical entry of effect or similar item, and those skilled in the art can
To understand that the printed words such as " first ", " second " are not defined quantity and execution order.
In the embodiment of the present invention, " illustrative " or " such as " etc. words for indicate make example, illustration or explanation.This hair
Be described as in bright embodiment " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as than it
Its embodiment or design scheme more preferably or more advantage.Specifically, use " illustrative " or " such as " etc. words be intended to
Related notion is presented in specific ways.In embodiments of the present invention, unless otherwise indicated, the meaning of " plurality " is refer to two or
It is more than two.
Technical solution provided by the present application is introduced with reference to the accompanying drawing.
Technical solution provided by the invention can be applied to various communication systems, for example, 5G communication system, the following evolution system
System or a variety of communication emerging systems etc..It may include plurality of application scenes, for example, Machine To Machine (Machine to
Machine, M2M), it is D2M, macro micro- communication, enhanced mobile Internet (enhance Mobile Broadband, eMBB), super
High reliability communicates (ultra Reliable&Low Latency Communication, uRLLC) and sea with ultralow time delay
Measure scenes such as Internet of Things Network Communication (Massive Machine Type Communication, mMTC).These scenes include but not
It is limited to: communication between communication or the network equipment and the network equipment or the network equipment and terminal room between terminal and terminal
In the scenes such as communication.The embodiment of the present invention can be applied to the network equipment in 5G communication system and the communication between terminal,
Or the communication between terminal and terminal or the communication between the network equipment and the network equipment.
Fig. 1 shows a kind of possible structural schematic diagram of communication system involved in the embodiment of the present invention.Such as Fig. 1 institute
Show, which includes sending ending equipment 100 and receiving device 200.
Illustratively, the sending ending equipment 100 in the embodiment of the present invention, can be to OFDM after generating OFDM baseband signal
Baseband signal carries out upconverting to carrier frequency, is sent to receiving device 200.
In embodiments of the present invention, above-mentioned sending ending equipment 100 can be the network equipment, be also possible to be that terminal is set
Standby, the present invention is not construed as limiting.For example, being directed to downlink, sending ending equipment 100 is the network equipment, and receiving device 200 sets for terminal
Standby, for uplink, sending ending equipment 100 is terminal device, and receiving device 200 is the network equipment.
The above-mentioned network equipment 100 can be base station, equipment of the core network, transmitting receiving node (Transmission and
Reception Point, TRP), relay station or access point etc..The network equipment 100 can be global system for mobile communications
(Global System for Mobile communication, GSM) or CDMA (Code Division Multiple
Access, CDMA) base transceiver station (Base Transceiver Station, BTS) in network, it is also possible to broadband code
Divide the NB (NodeB) in multiple access (Wideband Code Division Multiple Access, WCDMA), can also be LTE
In eNB or eNodeB (evolutional NodeB).The network equipment 100 can also be cloud Radio Access Network (Cloud
Radio Access Network, CRAN) wireless controller under scene.The network equipment 100 can also be in 5G communication system
The network equipment or future evolution network in the network equipment.Right word is not construed as limiting the invention.
Terminal 200 can may be catv terminal for wireless terminal, which can be directed to user and provide language
The equipment of sound and/or other business datum connectivity has the handheld device of wireless communication function, calculates equipment or be connected to nothing
Other processing equipments, mobile unit, wearable device, the terminal in future 5G network or the following evolution of line modem
PLMN network in terminal etc..Wireless terminal can be through wireless access network (Radio Access Network, RAN) and one
Or multiple cores net is communicated, wireless terminal can be mobile terminal, such as mobile phone (or being " honeycomb " phone) and tool
There is the computer of mobile terminal, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted movement
Device, they exchange language and/or data and personal communication service (Personal with wireless access network
Communication Service, PCS) phone, wireless phone, Session initiation Protocol (Session Initiation
Protocol, SIP) phone, wireless local loop (Wireless Local Loop, WLL) stand, personal digital assistant
Equipment such as (Personal Digital Assistant, PDA), wireless terminal may be mobile device, user equipment (User
Equipment, UE), UE terminal, access terminal, wireless telecom equipment, terminal unit, terminal station, movement station (Mobile
Station), mobile station (Mobile), distant station (Remote Station), remote station, remote terminal (Remote
Terminal), subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), user agent (User
Agent), terminal installation etc..As a kind of example, in embodiments of the present invention, it is to exemplify that Fig. 1, which is mobile phone with terminal,.
The executing subject of OFDM baseband signal generation method provided in an embodiment of the present invention can be raw for OFDM baseband signal
At device, which can be sending ending equipment, or can be realized in the sending ending equipment
The functional module and/or functional entity of the OFDM baseband signal generation method, specifically can be determining according to actual use demand,
The embodiment of the present invention is not construed as limiting.It is raw to OFDM baseband signal provided in an embodiment of the present invention below by taking sending ending equipment as an example
Illustratively illustrated at method.
Fig. 2 shows a kind of flow diagram of OFDM baseband signal generation method provided in an embodiment of the present invention, such as Fig. 2
Shown, which may include:
S201, sending ending equipment obtain the difference between first frequency and second frequency.
Sending ending equipment in the embodiment of the present invention can be the sending ending equipment in communication system shown in Fig. 1, for example, base
It stands.
In embodiments of the present invention, above-mentioned first frequency is the frequency bandwidth for the public resource block that first resource is concentrated
Centre frequency, the i.e. first frequency can be the center of the frequency bandwidth for all or part of public resource block that first resource is concentrated
Frequency, for example, above-mentioned first frequency is the first resource if it includes N number of public resource block that above-mentioned first resource, which is concentrated,
The centre frequency of frequency bandwidth shared by the N number of public resource block concentrated.Above-mentioned first resource collection is mapped in M OFDM symbol
On, the corresponding OFDM baseband signal of an OFDM symbol, the first above-mentioned OFDM baseband signal is in M OFDM baseband signal
An OFDM baseband signal corresponding with the first OFDM symbol.
In embodiments of the present invention, above-mentioned second frequency plays the role of reference frequency in embodiments of the present invention, from
And guarantee the boundary alignment of the public resource block of different sub-carrier interval transmission, and therefore, the second frequency in the embodiment of the present invention
Specific frequency values the present invention and with no restrictions, can be arbitrary value.
Optionally, in embodiments of the present invention, above-mentioned second frequency can be OFDM modulates baseband signals and up-conversion
Frequency, i.e., after generating above-mentioned M OFDM baseband signal, sending ending equipment is by M OFDM modulates baseband signals of generation
With upconvert on second frequency, to be sent.Due to OFDM baseband signal be modulated and up-conversion after, can be by OFDM
Modulates baseband signals are greater than the frequency of OFDM baseband signal to higher frequency second frequency.
Optionally, in embodiments of the present invention, when first resource integrates as the resource set transmitted on first carrier, at this point, on
The second frequency stated can be one of frequency in the frequency bandwidth of first carrier, for example, above-mentioned second frequency can be with
For the centre frequency of first carrier, it is also possible to the resource center of a lattice frequency in the first carrier with the configuration of any subcarrier spacing
Rate, any other frequency being also possible in the frequency bandwidth of the first carrier, is also possible to the specific of the first carrier
A frequency in frequency sets, this is not limited by the present invention.
It should be noted that the resource set in the embodiment of the present invention can be resource grid (resource specified in standard
Grid), it is also possible to transmit the resource set of the public resource block composition of SSB.
Optionally, in embodiments of the present invention, before S201, this method further includes the following step for obtaining first frequency
It is rapid:
S201a1, sending ending equipment obtain the first money that high-level signaling carries from the high-level signaling that the network equipment issues
The parameter information of source collection.
Wherein, the parameter information of above-mentioned first resource collection includes but is not limited to: first public money of first resource collection
Boundary respective frequencies, the quantity of the public resource block of first resource collection and the corresponding subcarrier spacing of first resource collection of source block
And the frequency f of frequency reference pointpointA。
S201a2, sending ending equipment calculate the centre frequency of the frequency bandwidth of first resource collection according to parameter information.
Illustratively, sending ending equipment is according to the boundary respective frequencies of first public resource block of first resource collection,
The quantity and the corresponding subcarrier spacing of first resource collection and f of the public resource block of one resource setpointA, calculate first
Then the frequency bandwidth of resource set determines the centre frequency of the frequency bandwidth.
Optionally, in embodiments of the present invention, the public resource block that above-mentioned first resource is concentrated is the public of transmission SSB
Resource block.Illustratively, before S201, this method further includes the steps that obtaining first frequency as follows:
S201b, sending ending equipment obtain the first frequency that high-level signaling carries from the high-level signaling that the network equipment indicates
Rate.
Illustratively, for non-cell defining SSB, (search for not carrying schedule system information PDCCH is believed
The SSB of breath), absolute frequency point position can be carried in the high-level signaling of network equipment instruction, which is transmit SSB the
The center frequency point of one resource set.
Optionally, in embodiments of the present invention, the public resource block that above-mentioned first resource is concentrated is the public of transmission SSB
Resource block.Illustratively, before S201, this method further includes the steps that obtaining first frequency as follows:
S201c1, sending ending equipment obtain the ginseng for the SSB that high-level signaling carries from the high-level signaling that the network equipment indicates
Number information.
S201c2, sending ending equipment calculate first frequency according to parameter information and frequency calculation formula.
Wherein, above-mentioned parameter information includes: the frequency f of frequency reference pointpointA, subcarrier in each RB number It transmits between the boundary and frequency reference point of first public resource block of SSB with first frequency interval delta
funit,1For the public resource number of blocks N of unitoffset, second frequency interval delta funit,2, SSB subcarrier spacing Δ fSSBAnd
Transmit the quantity of the public resource block of SSBAbove-mentioned Δ funit,2For first subcarrier and biography of SSB
Frequency interval between the boundary of first public resource block of defeated SSB.
Above-mentioned frequency calculation formula are as follows:
Illustratively, for cell defining SSB (can be arrived by terminal searching i.e. in cell searching, and
Carry the SSB of the search information of schedule system information PDCCH), the parameter of SSB can be carried in the high-level signaling that the network equipment indicates
Information is based on the parameter information, can determine the center frequency point of the first resource collection of transmission SSB.
S202, sending ending equipment determine the first OFDM according to the difference and the corresponding time-domain information of the first OFDM symbol
The corresponding phase pushing figure of baseband signal.
In embodiments of the present invention, the above-mentioned corresponding time-domain information of the first OFDM symbol includesTC、
In a kind of possible example, generated for the OFDM baseband signal in addition to PRACH, above-mentioned phase pushing figure For compensating first frequency f1 μWith second frequency f2Between difference on the frequency.
Example 1: if first frequency f1 μFor send 15kHz OFDM baseband signal resource grid centre frequency (i.e. μ=0),
Second frequency f2For the centre frequency of first carrier, thenSpecifically for compensating the resource center of a lattice of 15kHz subcarrier spacing
Difference on the frequency between frequency and the centre frequency of first carrier.
Example 2: if first frequency f1 μFor send 30kHz SSB OFDM baseband signal resource centre frequency (i.e. μ=
1), second frequency f2For the centre frequency of first carrier, thenSpecifically for compensating the center of the resource of 30kHz subcarrier spacing
Difference on the frequency between frequency and the centre frequency of first carrier.
In alternatively possible example, generated for the OFDM baseband signal of PRACH, above-mentioned phase pushing figure For compensating first frequency f1 μWith second frequency f2Between difference on the frequency.
Example 3: if first frequency f1 μFor send PRACH OFDM baseband signal 15kHz subcarrier spacing resource grid
Centre frequency (i.e. μ=0), second frequency f2For the centre frequency of first carrier, thenSpecifically between compensation 15kHz subcarrier
Every the centre frequency of resource grid and the centre frequency of first carrier between difference on the frequency.
S203, sending ending equipment are according to the data of the resource particle carried on the phase pushing figure and the first OFDM symbol
Symbol generates the first OFDM baseband signal.
Illustratively, in embodiments of the present invention, sending ending equipment can pass through when generating the first OFDM baseband signal
Following two implementation is realized:
The first possible implementation:
In this implementation, sending ending equipment can directly carry out phase benefit in the generating process of OFDM baseband signal
It repays.
Optionally, in embodiments of the present invention, S203 can specifically be realized by following steps:
S203a, sending ending equipment are according to the data symbol of the resource particle carried in phase pushing figure, the first OFDM symbol
And OFDM baseband signal generates formula, generates the first OFDM baseband signal.
Illustratively, in embodiments of the present invention, above-mentioned OFDM baseband signal generates formula and includes at least the following two kinds
Form:
Form 1 (generates) for the OFDM baseband signal in addition to PRACH:
Above-mentioned OFDM baseband signal generates formula can be as follows shown in formula 7:
Wherein,
Form 2 (generation for the OFDM baseband signal of PRACH):
Above-mentioned OFDM baseband signal generates formula can be as follows shown in formula 8:
Wherein, above-mentioned K=Δ f/ Δ fRA(i.e. above equation 4)；
Second of possible implementation:
In this implementation, sending ending equipment can be before the generation of OFDM baseband signal, to the data symbol of transmission
Phase compensation is carried out, OFDM baseband signal is then generated according to the data symbol after phase compensation.
Optionally, in embodiments of the present invention, S203 can specifically be realized by following steps:
The data of S203b1, sending ending equipment according to phase pushing figure, to the resource particle carried in the first OFDM symbol
Symbol carries out phase compensation.
S203b2, sending ending equipment are according to the data after phase compensation of the resource particle carried in the first OFDM symbol
Symbol generates the first OFDM baseband signal.
Illustratively, if the data symbol of the resource particle carried in the first OFDM symbol is usedIt indicates, transmitting terminal
Equipment can incite somebody to action before the generation of OFDM baseband signalWithIt is multiplied come to the resource grains carried in the first OFDM symbol
The data symbol of son carries out phase compensation, then, then using following formula generation OFDM baseband signal.
Above-mentioned OFDM baseband signal generates formula can be as follows shown in formula 9, for the OFDM base band in addition to PRACH
Signal generates:
Above-mentioned OFDM baseband signal generates formula can be as follows shown in formula 10, the OFDM baseband signal for PRACH
Generation:
Wherein, above-mentioned K=Δ f/ Δ fRA(i.e. above equation 4)；
OFDM baseband signal generation method provided in an embodiment of the present invention, during generating OFDM baseband signal, this
Difference on the frequency between the centre frequency and the second frequency of the frequency bandwidth for the public resource block that inventive embodiments are concentrated according to first resource
The time-domain information of value and any OFDM symbol in first resource collection M OFDM symbol of mapped determines that the OFDM is accorded with
Number phase pushing figure, thus to first resource concentrate public resource block frequency bandwidth centre frequency and the second frequency between
Difference on the frequency carry out phase compensation, come guarantee different sub-carrier interval transmission public resource block boundary alignment, can be to avoid life
At OFDM baseband signal there are phase deviations, so as to improve the efficiency of communication.
In addition, in the prior art, the network equipment in OFDM baseband signal formula by introducingIt embodies same
With the positional relationship on the boundary of the different SCS Common RB transmitted on one carrier wave, the OFDM base band of generation thereby may be ensured that
Signal can be sent on correct frequency location, so that in all Common RB transmitted on same carrier wave with different SCS
Subcarrier 0 be aligned.However, above-mentionedHigh-level signaling is needed to be indicated to terminal side, to introduce additional signaling overheads.
Therefore, OFDM baseband signal applied by OFDM baseband signal generation method provided in an embodiment of the present invention generates public
Do not include in formulaSo that whole process is without high-level signaling instructionSave additional signaling overheads.
As shown in figure 3, the embodiment of the present invention provides a kind of OFDM baseband signal generating means, which includes: to obtain
Module 301, determining module 302 and generation module 303, in which:
Module 301 is obtained, for obtaining the difference between first frequency and second frequency；Wherein, above-mentioned first frequency is
The centre frequency of the frequency bandwidth for the public resource block that first resource is concentrated, above-mentioned first resource collection are mapped in M OFDM symbol
On number, the corresponding OFDM baseband signal of OFDM symbol, the first OFDM baseband signal is in M OFDM baseband signal with the
The corresponding OFDM baseband signal of one OFDM symbol.
Determining module 302, for being believed according to the difference and the corresponding time domain of the first OFDM symbol that obtain the acquisition of module 301
Breath, determines the corresponding phase pushing figure of the first OFDM baseband signal.
Generation module 303, for being carried according in the determining phase pushing figure of determining module 302 and the first OFDM symbol
Resource particle data symbol, generate the first OFDM baseband signal.
Optionally, as shown in figure 3, the device 300, further includes: sending module 304, in which:
Sending module 304, M OFDM modulates baseband signals for generating generation module 303 and upconverts to second
In frequency, to be sent.
Optionally, above-mentioned generation module 303 is specifically used for: the phase pushing figure determined according to determining module 302, to
The data symbol of the resource particle carried in one OFDM symbol carries out phase compensation；According to the resource carried in the first OFDM symbol
The data symbol after phase compensation of particle generates the first OFDM baseband signal.
Optionally, the public resource block that the public resource block that above-mentioned first resource is concentrated is synchronous signal transmission block SSB；
Module 301 is obtained, is also used to from the high-level signaling that the network equipment indicates, the first frequency that high-level signaling carries is obtained.
Optionally, the public resource block that the public resource block that above-mentioned first resource is concentrated is synchronous signal transmission block SSB；
Module 301 is obtained, is also used to from the high-level signaling that the network equipment indicates, the parameter information for the SSB that high-level signaling carries is obtained,
According to parameter information and frequency calculation formula, first frequency is calculated.
Wherein, parameter information includes: the frequency f of frequency reference pointpointA, subcarrier in each RB numberIt passes
With first frequency interval delta f between the boundary and frequency reference point of first public resource block of defeated SSBunit,1For the public affairs of unit
Resource block quantity N altogetheroffset, second frequency interval delta funit,2, SSB subcarrier spacing Δ fSSBAnd the public money of transmission SSB
The quantity of source blockΔfunit,2Between boundary for first public resource block of first subcarrier and transmission SSB of SSB
Frequency interval；Frequency calculation formula are as follows:
OFDM baseband signal generating means provided in an embodiment of the present invention, the device is in the process for generating OFDM baseband signal
In, the frequency difference and the between the centre frequency and the second frequency of the frequency bandwidth for the public resource block concentrated according to first resource
The time-domain information of any OFDM symbol in one M OFDM symbol of resource set mapped, determines the phase of the OFDM symbol
Offset, thus to first resource concentrate public resource block frequency bandwidth centre frequency and the second frequency between difference on the frequency into
Row phase compensation, come guarantee different sub-carrier interval transmission public resource block boundary alignment, can be to avoid the OFDM of generation
There are phase deviations for baseband signal, so as to improve the efficiency of communication.
OFDM baseband signal generating means provided in an embodiment of the present invention can be realized in above method embodiment shown in Fig. 2
Process, to avoid repeating, details are not described herein again.
A kind of hardware structural diagram of Fig. 4 OFDM baseband signal generating means of embodiment to realize the present invention, the dress
Setting 400 includes: processor 401, transceiver 402, memory 403, user interface 404 and bus interface.
Wherein, processor 401, for obtaining the difference between first frequency and second frequency；Wherein, above-mentioned first frequency
For the centre frequency of the frequency bandwidth of the public resource block of first resource concentration, above-mentioned first resource collection is mapped in M OFDM
On symbol, the corresponding OFDM baseband signal of OFDM symbol, the first OFDM baseband signal be in M OFDM baseband signal and
The corresponding OFDM baseband signal of first OFDM symbol；According to difference and the corresponding time-domain information of the first OFDM symbol, really
The fixed corresponding phase pushing figure of first OFDM baseband signal；According to the resource carried on phase pushing figure and the first OFDM symbol
The data symbol of particle generates the first OFDM baseband signal.
OFDM baseband signal generating means provided in an embodiment of the present invention, the device is in the process for generating OFDM baseband signal
In, the frequency difference and the between the centre frequency and the second frequency of the frequency bandwidth for the public resource block concentrated according to first resource
The time-domain information of any OFDM symbol in one M OFDM symbol of resource set mapped, determines the phase of the OFDM symbol
Offset, thus to first resource concentrate public resource block frequency bandwidth centre frequency and the second frequency between difference on the frequency into
Row phase compensation, come guarantee different sub-carrier interval transmission public resource block boundary alignment, can be to avoid the OFDM of generation
There are phase deviations for baseband signal, so as to improve the efficiency of communication.
In the embodiment of the present invention, in Fig. 4, bus architecture may include the bus and bridge of any number of interconnection, specifically
The various circuits for the memory that the one or more processors and memory 403 represented by processor 401 represent link together.
Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can also be linked at one by bus architecture
It rises, these are all it is known in the art, and therefore, it will not be further described herein.Bus interface provides interface.It receives
Hair machine 402 can be multiple element, that is, include transmitter and receiver, provide for over a transmission medium with various other devices
The unit of communication.Processor 401, which is responsible for management bus architecture and common processing, memory 403, can store processor 401 and exists
Execute used data when operation.
In addition, OFDM baseband signal generating means 400 further include some unshowned functional modules, details are not described herein.
Optionally, the embodiment of the present invention also provides a kind of sending ending equipment, including processor, and memory is stored in storage
On device and the computer program that can run on a processor, the computer program realize above-described embodiment one when being executed by processor
In OFDM baseband signal generation method process, and identical technical effect can be reached, it is no longer superfluous here to avoid repeating
It states.
The embodiment of the present invention also provides a kind of computer readable storage medium, and meter is stored on computer readable storage medium
Calculation machine program, the computer program realize the more of the OFDM baseband signal generation method in above-described embodiment when being executed by processor
A process, and identical technical effect can be reached, to avoid repeating, which is not described herein again.Wherein, computer-readable storage medium
Matter, such as read-only memory (Read-Only Memory, abbreviation ROM), random access memory (Random Access
Memory, abbreviation RAM), magnetic or disk etc..
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in various embodiments of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Claims (14)
1. a kind of orthogonal frequency division multiplex OFDM baseband signal generation method, which is characterized in that this method comprises:
Obtain the difference between first frequency and second frequency；Wherein, the first frequency is the public resource that first resource is concentrated
The centre frequency of the frequency bandwidth of block, the first resource collection are mapped in M OFDM symbol, and an OFDM symbol is one corresponding
OFDM baseband signal, the first OFDM baseband signal are one corresponding with the first OFDM symbol in the M OFDM baseband signal
OFDM baseband signal；
According to the difference and the corresponding time-domain information of first OFDM symbol, the first OFDM baseband signal pair is determined
The phase pushing figure answered；
According to the data symbol of the resource particle carried on the phase pushing figure and first OFDM symbol, described in generation
First OFDM baseband signal.
2. the method according to claim 1, wherein described according to the phase pushing figure and described first
The data symbol of the resource particle carried in OFDM symbol, after generating the first OFDM baseband signal, the method is also wrapped
It includes:
It by the M OFDM modulates baseband signals of generation and upconverts on the second frequency, to be sent.
3. the method according to claim 1, wherein described according to the phase pushing figure and described first
The data symbol of the resource particle carried in OFDM symbol generates the first OFDM baseband signal, comprising:
According to the phase pushing figure, phase benefit is carried out to the data symbol of the resource particle carried in first OFDM symbol
It repays；
According to the data symbol after phase compensation of the resource particle carried in first OFDM symbol, described first is generated
OFDM baseband signal.
4. method according to any one of claims 1 to 3, which is characterized in that the public resource that the first resource is concentrated
Block is the public resource block of synchronous signal transmission block SSB；
Before the difference obtained between first frequency and second frequency, the method also includes:
From the high-level signaling that the network equipment indicates, the first frequency that the high-level signaling carries is obtained.
5. method according to any one of claims 1 to 3, which is characterized in that the public resource that the first resource is concentrated
Block is the public resource block of synchronous signal transmission block SSB；
Before the difference obtained between first frequency and second frequency, the method also includes:
From the high-level signaling that the network equipment indicates, the parameter information for the SSB that the high-level signaling carries is obtained；
According to the parameter information and frequency calculation formula, the first frequency is calculated；
Wherein, the parameter information includes: the frequency f of frequency reference pointpointA, subcarrier in each RB numberIt passes
With first frequency interval delta f between the boundary and frequency reference point of first public resource block of the defeated SSBunit,1For
The public resource number of blocks N of unitoffset, second frequency interval delta funit,2, the SSB subcarrier spacing Δ fSSBAnd it passes
The quantity of the public resource block of the defeated SSBThe Δ funit,2For described in first subcarrier of the SSB and transmission
Frequency interval between the boundary of first public resource block of SSB；
The frequency calculation formula are as follows:
6. the method according to claim 1, wherein the first resource integrates as the resource transmitted on first carrier
Collection；The second frequency is one of frequency in the frequency bandwidth of the first carrier.
7. a kind of orthogonal frequency division multiplex OFDM baseband signal generating means characterized by comprising
Module is obtained, for obtaining the difference between first frequency and second frequency；Wherein, the first frequency is first resource collection
In public resource block frequency bandwidth centre frequency, the first resource collection is mapped in M OFDM symbol, an OFDM
Symbol corresponds to an OFDM baseband signal, and the first OFDM baseband signal is to accord in the M OFDM baseband signal with the first OFDM
A number corresponding OFDM baseband signal；
Determining module, the difference and the corresponding time domain of first OFDM symbol for being obtained according to the acquisition module
Information determines the corresponding phase pushing figure of the first OFDM baseband signal；
Generation module, for being held according in the determining phase pushing figure of the determining module and first OFDM symbol
The data symbol of the resource particle of load generates the first OFDM baseband signal.
8. device according to claim 7, which is characterized in that described device, further includes:
Sending module, M OFDM modulates baseband signals for generating the generation module and upconverts to described the
In two frequencies, to be sent.
9. device according to claim 7, which is characterized in that the generation module is specifically used for:
According to the phase pushing figure, phase benefit is carried out to the data symbol of the resource particle carried in first OFDM symbol
It repays；
According to the data symbol after phase compensation of the resource particle carried in first OFDM symbol, described first is generated
OFDM baseband signal.
10. device according to any one of claims 7 to 9, which is characterized in that the public resource that the first resource is concentrated
Block is the public resource block of synchronous signal transmission block SSB；
The acquisition module is also used to from the high-level signaling that the network equipment indicates, obtains the described of the high-level signaling carrying
First frequency.
11. device according to any one of claims 7 to 9, which is characterized in that the public resource that the first resource is concentrated
Block is the public resource block of synchronous signal transmission block SSB；
The acquisition module is also used to from the high-level signaling that the network equipment indicates, obtains the described of the high-level signaling carrying
The parameter information of SSB calculates the first frequency according to the parameter information and frequency calculation formula；
Wherein, the parameter information includes: the frequency f of frequency reference pointpointA, subcarrier in each RB numberIt passes
With first frequency interval delta f between the boundary and frequency reference point of first public resource block of the defeated SSBunit,1For
The public resource number of blocks N of unitoffset, second frequency interval delta funit,2, the SSB subcarrier spacing Δ fSSBAnd it passes
The quantity of the public resource block of the defeated SSBThe Δ funit,2For described in first subcarrier of the SSB and transmission
Frequency interval between the boundary of first public resource block of SSB；
The frequency calculation formula are as follows:
12. device according to claim 7, which is characterized in that the first resource integrates as the money transmitted on first carrier
Source collection；The second frequency is one of frequency in the frequency bandwidth of the first carrier.
13. a kind of OFDM baseband signal generating means, which is characterized in that including processor, memory and be stored in the storage
On device and the computer program that can run on the processor, realized such as when the computer program is executed by the processor
The step of OFDM baseband signal generation method described in any one of claims 1 to 6.
14. a kind of computer readable storage medium, which is characterized in that store computer journey on the computer readable storage medium
Sequence is realized when the computer program is executed by processor as OFDM baseband signal described in any one of claims 1 to 6 is raw
The step of at method.
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