CN101534265B - Mapping method for special downlink pilot frequency and physical resource block - Google Patents
Mapping method for special downlink pilot frequency and physical resource block Download PDFInfo
- Publication number
- CN101534265B CN101534265B CN 200810086465 CN200810086465A CN101534265B CN 101534265 B CN101534265 B CN 101534265B CN 200810086465 CN200810086465 CN 200810086465 CN 200810086465 A CN200810086465 A CN 200810086465A CN 101534265 B CN101534265 B CN 101534265B
- Authority
- CN
- China
- Prior art keywords
- frequency
- mapped
- time domain
- descending special
- ofdm symbol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a mapping method for special downlink pilot frequency and a physical resource block. The method comprises the following processings: processing of frequency domain interval arrangement in which the frequency domain interval of the special downlink pilot frequency mapped to the same time domain is arranged as 3 subcarriers, processing of time domain interval arrangement in which the time domain interval of the special downlink pilot frequency mapped to different time domains is arranged as 2 OFDM marks, processing of initial mapping in which a first special downlink pilot frequency is mapped to corresponding positions, with initial positions being expressed by A and B, wherein A is the initial position of the frequency domain and B is the initial position of the time domain, and mapping processing of other special downlink pilot frequencies is performed according to the initial position, the frequency domain interval, the time domain interval and preset rules of the first special downlink pilot frequency. By the invention, the problem in the existing LTE standard version that public pilot frequency can not acquire all channel information is solved and expenditure for the feedback of beam formation weight is avoided.
Description
Technical field
The present invention relates to descending special pilot frequency in the long loop prefix frame structure in the moving communicating field long evolving system (Long term evolution, be called for short LTE) and the mapping method of Physical Resource Block.
Background technology
At LTE (Long term evolution, long evolving system) the existing version 3GPP of standard (3rd Generation partnership project, third generation mobile partner plan) among the TR 36.211, stipulated to support the beam-forming technology of single current, wave beam forms and precoding in order to distinguish, and also clear and definite wave beam formation is applied to antenna number more than or equal to four condition.But, only having defined four road public guide frequencies in the LTE standard existing version, so only adopted four road public guide frequencies in the reality, the channel information of every antenna port is all extracted by corresponding public guide frequency.Therefore, greater than 4 o'clock, can't obtain the real channel information of every antenna in antenna number.
If increase the quantity of public guide frequency, insert public guide frequency according to eight antenna ports, pilot-frequency expense will be very large so, and the real channel that the up/down row estimates is also variant, still the weight feedback information that needs wave beam to form, and wave beam form descending special pilot frequency and can estimate wave beam and form after with the channel of directivity, namely, estimate that by dedicated pilot the channel information that obtains has comprised real wireless channel and wave beam forms the weights of processing, therefore adopting descending special pilot frequency is that an expense is little, the solution that performance is good.
As mentioned above, in the version of existing LTE standard, when the base station end adopts wave beam greater than 4 antennas to form, public guide frequency can't obtain whole channel informations, and exist wave beam to form the problem of the feedback overhead of weights, need a kind of new descending special pilot frequency and the mapping method of Physical Resource Block.
Summary of the invention
Consider exist in the correlation technique in the version of existing LTE standard, when the base station end adopts wave beam greater than 4 antennas to form, public guide frequency can't obtain whole channel informations, and exist wave beam form weights feedback overhead problem and the present invention is proposed, for this reason, the present invention aims to provide the mapping method of descending special pilot frequency and Physical Resource Block in a kind of long loop prefix (Extend CP) frame structure, it is by the position of clear and definite frequency pilot sign in Physical Resource Block, so that existing LTE version is when the dedicated pilot design of using according to the embodiment of the invention, can with less expense, support wave beam to form with more excellent performance simultaneously.
The invention provides the mapping method of a kind of descending special pilot frequency and Physical Resource Block, the method is used for the mapping of long evolving system descending special pilot frequency and Physical Resource Block, wherein, Physical Resource Block comprises 12 subcarriers at frequency domain, comprises 12 OFDM symbols in time domain.
The method comprises following processing: the frequency domain interval set handling, and for the descending special pilot frequency that is mapped to same time domain, its frequency domain interval is set to 3 subcarriers; The time domain interval set handling for the descending special pilot frequency that is mapped to different time domain, is set to 2 OFDM symbols with its time domain; Initial mapping processing is mapped to the position with first descending special pilot frequency, and wherein, initial position represents that with A and B wherein, A is frequency domain initial position, and B is the time domain initial position; Process according to the mapping that initial position, frequency domain interval and time domain interval and the pre-defined rule of first descending special pilot frequency carries out other descending special pilot frequencies.
Preferably, in initial mapping processing, in described initial mapping processing, B is set to the time domain end position, and A is set to be positioned at the first row public guide frequency of Resource Block the frequency domain position of same sub-carrier.
Preferably, pre-defined rule is: at three descending special pilot frequencies of same time domain mapping; In the middle of the frequency domain position that time domain is mapped to first descending special pilot frequency of M OFDM symbol is set to be positioned at the frequency domain position of the first two dedicated pilot that is mapped to B OFDM symbol, wherein, M=B-3; The frequency domain position that is mapped to first descending special pilot frequency of N OFDM symbol in time domain is set to identical with the frequency domain position of first dedicated pilot that is mapped to B OFDM symbol, wherein, and N=B-2*3; In the middle of the frequency domain position that time domain is mapped to first descending special pilot frequency of G OFDM symbol is set to be positioned at the frequency domain position of the first two dedicated pilot that is mapped to B OFDM symbol, wherein, G=B-3*3, perhaps, G=B-3*3+2, perhaps, G=B-3*3+1.
Wherein, when public guide frequency and dedicated pilot can not carry out frequency hopping together, if control information takies front 2 OFDM symbols, G=B-3*3 then was if control information takies front 3 OFDM symbols, then G=B-3*3+2; When public guide frequency and dedicated pilot together frequency hopping, G=B-3*3+1, wherein, B=12.
Preferably, the operation of the mapping of other descending special pilot frequencies of above-mentioned carrying out processing is specially: second descending special pilot frequency is mapped to the 12nd OFDM symbol in time domain, is mapped to A+4 subcarrier at frequency domain; The 3rd descending special pilot frequency is mapped to the 12nd OFDM symbol in time domain, is mapped to A+8 subcarrier at frequency domain; The 4th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain; The 5th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain; The 6th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain; The 7th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A subcarrier at frequency domain; The 8th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A+4 subcarrier at frequency domain; The 9th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A+8 subcarrier at frequency domain.
Preferably, said method further comprises: the tenth descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain; The 11 descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain; The 12 descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain; Perhaps, the tenth descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain; The 11 descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain; The 12 descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain; Perhaps, the tenth descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain; The 11 descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain; The 12 descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain.Wherein, A=1.
By above-mentioned at least one technical scheme provided by the invention, realized following beneficial effect: by the position of clear and definite frequency pilot sign in Physical Resource Block, solved when the base station end adopts wave beam greater than 4 antennas to form, public guide frequency can't obtain the problem of whole channel informations in the version of existing LTE standard; And comprise the processing weights that real channel information and wave beam form by the channel information that dedicated pilot is obtained, so that UE need not to form emission value obtaining specially wave beam, thereby avoided wave beam to form the feedback overhead of weights.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 be according to regulation among the 3GPP TR 36.211 of the embodiment of the invention in the frame structure of long loop prefix, the Physical Resource Block schematic diagram of two-way public guide frequency before adopting;
Fig. 2 is the flow chart according to the mapping method of the descending special pilot frequency of the inventive method embodiment and Physical Resource Block;
Fig. 3 is the schematic diagram (public guide frequency and dedicated pilot be frequency hopping together) of the example one of method shown in Figure 2;
Fig. 4 (A) is the schematic diagram (control information takies the situation of front 2 OFDM symbols) of the example two of method shown in Figure 2;
Fig. 4 (B) is the schematic diagram (control information takies the situation of front 3 OFDM symbols) of the example two of method shown in Figure 2.
Embodiment
As mentioned above, there are the following problems in the version of existing LTE standard: when adopting wave beam to form, public guide frequency can't be finished data channel and detect.In addition, normal cyclic prefix (Normal Cyclic Prefix is designated hereinafter simply as normal CP) descending special pilot frequency of frame structure and the mapping method of Physical Resource Block have been defined in the 52nd meeting of LTE standard, based on this, the present invention provides a kind of expense little with reference to this meeting conclusion, long loop prefix (Extend Cyclic Prefix is designated hereinafter simply as Extend CP) descending special pilot frequency of frame structure and the mapping method of Physical Resource Block that performance is excellent.
Mapping method according to descending special pilot frequency and Physical Resource Block in the normal cyclic prefix frame structure that proposes in the 52nd meeting of LTE standard, when adopting wave beam to form descending special pilot frequency, only insert the two-way public guide frequency, be used for the detection of omnidirectional's control channel, the mapping relations of the Physical Resource Block (Resource Block is hereinafter to be referred as RB) of two-way public guide frequency and minimum as shown in Figure 1.Wherein, Fig. 1 be among the 3GPP TR 36.211 regulation in the frame structure of long loop prefix, the Physical Resource Block schematic diagram of two-way public guide frequency before adopting.
In addition, in the schematic diagram shown in the left side of Fig. 1, show the second road public guide frequency R1 of the transmission that is not used on the antenna port 1, show the first via public guide frequency R0 on the antenna port 0, also show in addition resource element (k, l); In the schematic diagram shown in the right side of Fig. 1, show the first via public guide frequency R0 of the transmission that is not used on the antenna port 1, show the second road public guide frequency R1 on the antenna port 0, also show in addition resource element (k, l).
Below will provide the embodiment of the invention for the frame structure of long loop prefix (Extend cyclic prefix).Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
According to the embodiment of the invention, the mapping method of a kind of descending special pilot frequency and Physical Resource Block is provided, the method can be for the mapping of descending special pilot frequency and Physical Resource Block in the frame structure (RB comprises 12 subcarriers at frequency domain, comprises 12 OFDM symbols in time domain) of LTE system employing long loop prefix.
As shown in Figure 2, the method comprises following processing (step S202-step S208):
Step S202, the frequency domain interval set handling, for the descending special pilot frequency that is mapped to same time domain, its frequency domain interval is set to 3 subcarriers;
Step S204, the time domain interval set handling for the descending special pilot frequency that is mapped to different time domain, is set to 2 OFDM symbols with its time domain;
Step S206, initial mapping processing is mapped to initial position with first descending special pilot frequency, and wherein, initial position represents that with A and B wherein, A is frequency domain initial position, and B is the time domain initial position;
Step S208 processes according to the mapping that initial position, frequency domain interval and time domain interval and the pre-defined rule of first descending special pilot frequency carries out other descending special pilot frequencies.
Below will describe above-mentioned every processing in detail.
(1) step S202, frequency domain interval set handling (perhaps being called frequency domain density set handling)
The present invention determines that in a RB each wave beam forms descending special pilot frequency at three subcarriers of frequency domain interval; When a plurality of RB sent together, the frequency domain density of dedicated pilot kept evenly distributing, all the time three subcarriers in interval.
The density that dedicated pilot symbol is inserted at frequency domain is determined by coherence bandwidth, therefore for avoiding the distortion of channel estimating, the minimum of pilot density is determined by nyquist sampling theorem, for further guaranteeing the performance of channel estimating, we use the number of pilot symbols of sampling thheorem twice in the present invention, then the frequency domain interval S of pilot tone
fShown in (1):
In formula 1, Δ f is subcarrier spacing, τ
MaxBe the maximum delay of channel, this parameter is with reference to 3GPP TR25.996.Therefore, the design of the dedicated pilot of frequency domain interval 3 subcarriers can be satisfied the requirement of channel estimating fully.
(2) step S204, time domain interval set handling (perhaps being called the time domain density set handling)
The density that frequency pilot sign is inserted in time domain is by determining that for avoiding the distortion of channel estimating, the minimum of pilot density is determined by nyquist sampling theorem coherence time.In order further to improve the performance of channel estimating, use the number of pilot symbols of sampling thheorem twice among the present invention, then the time domain interval S of pilot tone
tShown in (2):
In formula (2), f
dBe maximum doppler frequency, the maximum translational speed of LTE regulation UE is 350km/h, at this, and f
d=648Hz.T
fIt is the time of an OFDM symbol.Two the OFDM symbols in descending special pilot frequency interval can satisfy down at a high speed the requirement of channel estimating.
By above-mentioned time domain interval and the set handling of frequency domain interval, so that dedicated pilot is very even in time domain and frequency domain distribution, can guarantee the quality of channel estimating.
(3) step S206, initial mapping processing
In this step, B is set to the time domain end position, and A is set to: identical with the position on the residing subcarrier of first public guide frequency on each OFDM symbol of minimal physical Resource Block, that is, A is positioned at same sub-carrier for the first row public guide frequency with Resource Block; Specifically can be referring to Fig. 3, Fig. 4 (A), Fig. 4 (B).
Preferably, A=1, B=12 namely, is first subcarrier with first descending special pilot frequency in the mapping original position of frequency domain, is the 12 OFDM symbol in the position of time domain mapping.This dedicated pilot is more reasonable at previous other dedicated pilot mapping method that proposes of the original position design of time domain, and in the situation of same pilot expense, performance is more excellent.
(1) frequency domain original position.
The first row wave beam form descending special pilot frequency at frequency domain from first subcarrier, dedicated pilot is identical with the original position of public guide frequency on frequency domain, such as Fig. 3, Fig. 4 (A), shown in Fig. 4 (B), wave beam forms weights to be estimated to obtain behind the real channel by the upstream or downstream public guide frequency, and the pilot tone that is used further to the adjacent position will be recovered channel information more accurately.
(2) time domain original position.Similar to the physical resource mapping method of the descending special pilot frequency of LTE normal cyclic prefix frame structure, the frequency domain original position of descending special pilot frequency is the 12 OFDM symbol, can guarantee that dedicated pilot is uniform in Physical Resource Block, realize better channel estimating performance.
(4) step S208
In this step, at three descending special pilot frequencies of same time domain mapping.
And, in the middle of the frequency domain position that time domain is mapped to first descending special pilot frequency of M OFDM symbol is set to be positioned at the frequency domain position of the first two dedicated pilot that is mapped to B OFDM symbol, wherein, M=B-3; Be conducive to like this improve the performance of channel estimating interpolation, avoid a row or column pilot symbol distribution of Resource Block overstocked, and other position pilot distribution are too sparse, thereby the correlation that causes channel can not take full advantage of, the variation of channel can not be followed the tracks of immediately, greatly reduces the problem of the quality of channel estimating.
In addition, the frequency domain position that is mapped to first descending special pilot frequency of N OFDM symbol in time domain is set to identical with the frequency domain position of first dedicated pilot that is mapped to B OFDM symbol, wherein, and N=B-2*3; This is because because after surpassing 5 OFDM, variation has occured channel, the correlation that can not recycle channel is carried out channel estimating, need to again know the channel information on this carrier wave.
Similarly, in the middle of the frequency domain position that time domain is mapped to first descending special pilot frequency of G OFDM symbol is set to be positioned at the frequency domain position of the first two dedicated pilot that is mapped to B OFDM symbol, wherein, G=B-3*3, perhaps, G=B-3*3+2, perhaps, G=B-3*3+1.Particularly, when public guide frequency and dedicated pilot can not carry out frequency hopping together, if control information takies front 2 OFDM symbols, G=B-3*3 then was if control information takies front 3 OFDM symbols, then G=B-3*3+2; When public guide frequency and dedicated pilot together frequency hopping, G=B-3*3+1, wherein, B=12.Below will be described in conjunction with example respectively.
That is to say, if will be mapped to the descending special pilot frequency of the 12nd OFDM symbol as the first row dedicated pilot, then the dedicated pilot of the first row and the third line distributes consistent, the dedicated pilot of the second row and fourth line distributes consistent, and the frequency domain original position of first dedicated pilot of the first row/the third line is positioned at the centre of frequency domain position of the first two dedicated pilot of the second row/fourth line.Fig. 3 all shows above-mentioned distribution among Fig. 4 (A) and Fig. 4 (B).
Example one: descending special pilot frequency can with public guide frequency together frequency hopping
Here, as shown in Figure 3, because A=1, B=12, M=9 then, N=6, G=4 that is to say, in embodiments of the present invention, respectively descending special pilot frequency is mapped to the 4th, the 9th, the individual OFDM symbol of the 12nd (B=12) in time domain.
Based on foregoing, the operation of carrying out the mapping processing of other descending special pilot frequencies in step S208 is specially:
Second descending special pilot frequency is mapped to the 12nd OFDM symbol in time domain, is mapped to A+4=5 subcarrier at frequency domain;
The 3rd descending special pilot frequency is mapped to the 12nd OFDM symbol in time domain, is mapped to A+8=9 subcarrier at frequency domain;
The 4th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+2=3 subcarrier at frequency domain;
The 5th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+6=7 subcarrier at frequency domain;
The 6th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+10=11 subcarrier at frequency domain;
The 7th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A=1 subcarrier at frequency domain;
The 8th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A+4 subcarrier at frequency domain;
The 9th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A+8=9 subcarrier at frequency domain;
The tenth descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+2=3 subcarrier at frequency domain;
The 11 descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+6=7 subcarrier at frequency domain;
The 12 descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+10=11 subcarrier at frequency domain.
Particularly, Fig. 3 shows by the descending special pilot frequency of said process realization and the mapping relations of Physical Resource Block.As seen in Figure 3, dedicated pilot is convenient to guarantee that at the original position next-door neighbour public guide frequency of frequency domain channel information extracts and the consistency of application site, reduces cumulative errors.
Example two: descending special pilot frequency can with public guide frequency together frequency hopping
Shown in Fig. 4 (A) and 4 (B), minimal physical resource block size is that time domain comprises 12 OFDM symbols in the frame structure of long loop prefix, and frequency domain comprises 12 subcarriers, and the two-way public guide frequency is distributed in the 1st row of minimal physical Resource Block, the 4th row, the 7th row and the 10th row.
(1) control information takies the first two OFDM symbol
With reference to Fig. 4 (A), A=1, B=12, M=9 then, N=6, G=3.
At this moment, in step S208, the mapping mode of front nine descending special pilot frequencies is identical with the mapping mode of describing with reference to Fig. 3, and the mapping mode of the tenth to the 12 descending special pilot frequency is as follows:
The tenth descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+2=3 subcarrier at frequency domain;
The 11 descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+6=7 subcarrier at frequency domain;
The 12 descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+10=11 subcarrier at frequency domain.
(2) control information takies first three OFDM symbol
At this moment, with reference to Fig. 4 (B), A=1, B=12, M=9 then, N=6, G=5.
At this moment, in step S208, the mapping mode of front nine descending special pilot frequencies is identical with the mapping mode of describing with reference to Fig. 3, and the mapping mode of the tenth to the 12 descending special pilot frequency is as follows:
The tenth descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+2=3 subcarrier at frequency domain;
The 11 descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+6=7 subcarrier at frequency domain;
The 12 descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+10=11 subcarrier at frequency domain.
Can find out from top description, in the present invention, by setting in advance frequency domain interval and time domain interval, and the position (frequency domain original position and time domain original position) of definite first descending special pilot frequency, and according to pre-defined rule, just can determine the position of frequency pilot sign in Physical Resource Block.
Any antenna amount of descending special pilot frequency structural support in the embodiment of the invention and the single current wave beam of antenna distance form.Descending special pilot frequency is distinguished according to wave beam, what relate in embodiments of the present invention is the wave beam formation of simple beam, so the dedicated pilot structure that embodiments of the invention provide comprises one road dedicated pilot, to those skilled in the art, can be generalized to according to corresponding pilot density the situation of multi-beam, for example, two wave beams adopt the two-way dedicated pilot, by that analogy.
As mentioned above, by above-mentioned at least one technical scheme provided by the invention, realized following beneficial effect: (1) is by the position of clear and definite frequency pilot sign in Physical Resource Block, solved when the base station end adopts wave beam greater than 4 antennas to form, public guide frequency can't obtain the problem of whole channel informations in the version of existing LTE standard; (2) comprise the processing weights that real channel information and wave beam form by the channel information that dedicated pilot is obtained, so that UE need not to form emission value obtaining specially wave beam, thereby avoided wave beam to form the feedback overhead of weights; (3) in addition, dedicated pilot is more reasonable at the previous dedicated pilot mapping method that proposes of the original position design of time domain, and in the situation of same pilot expense, performance is more excellent; (4) because dedicated pilot is close to public guide frequency in the original position of frequency domain, be convenient to guarantee that channel information extracts and the consistency of application site, reduce cumulative errors, further, (5) because dedicated pilot is very even in time domain and frequency domain distribution, therefore guarantee the quality of channel estimating.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the mapping method of a descending special pilot frequency and Physical Resource Block, be used for the mapping of long evolving system descending special pilot frequency and Physical Resource Block, wherein, described Physical Resource Block comprises 12 subcarriers at frequency domain, and comprising 12 OFDM symbols in time domain is the OFDM symbol; It is characterized in that described method comprises:
The frequency domain interval set handling, for the descending special pilot frequency that is mapped to same time domain, its frequency domain interval is set to 3 subcarriers;
The time domain interval set handling for the descending special pilot frequency that is mapped to different time domain, is set to 2 OFDM symbols with its time domain;
Initial mapping processing is mapped to initial position with first descending special pilot frequency, and wherein, described initial position represents that with A and B wherein, A is frequency domain initial position, and B is the time domain initial position;
Carry out the mapping processing of other descending special pilot frequencies according to the described initial position of described first descending special pilot frequency, described frequency domain interval and described time domain interval and pre-defined rule;
Wherein, in described initial mapping processing, B is set to the time domain end position, and A is set to be positioned at the first row public guide frequency of Resource Block the frequency domain position of same sub-carrier;
Wherein, described pre-defined rule is:
At three descending special pilot frequencies of same time domain mapping;
In the middle of the frequency domain position that time domain is mapped to first descending special pilot frequency of M OFDM symbol is set to be positioned at the frequency domain position of the first two dedicated pilot that is mapped to B OFDM symbol, wherein, M=B-3;
The frequency domain position that is mapped to first descending special pilot frequency of N OFDM symbol in time domain is set to identical with the frequency domain position of first dedicated pilot that is mapped to B OFDM symbol, wherein, and N=B-2*3;
In the middle of the frequency domain position that time domain is mapped to first descending special pilot frequency of G OFDM symbol is set to be positioned at the frequency domain position of the first two dedicated pilot that is mapped to B OFDM symbol, wherein, G=B-3*3, perhaps, G=B-3*3+2, perhaps, G=B-3*3+1;
Wherein, B=12.
2. method according to claim 1 is characterized in that, when public guide frequency and dedicated pilot can not carry out frequency hopping together, if control information takies front 2 OFDM symbols, G=B-3*3 then is if control information takies front 3 OFDM symbols, then G=B-3*3+2; When public guide frequency and dedicated pilot together frequency hopping, G=B-3*3+1.
3. method according to claim 1 and 2 is characterized in that, the operation that the described mapping of carrying out other descending special pilot frequencies is processed is specially:
Second descending special pilot frequency is mapped to the 12nd OFDM symbol in time domain, is mapped to A+4 subcarrier at frequency domain;
The 3rd descending special pilot frequency is mapped to the 12nd OFDM symbol in time domain, is mapped to A+8 subcarrier at frequency domain;
The 4th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain;
The 5th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain;
The 6th descending special pilot frequency is mapped to the 9th OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain;
The 7th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A subcarrier at frequency domain;
The 8th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A+4 subcarrier at frequency domain;
The 9th descending special pilot frequency is mapped to the 6th OFDM symbol in time domain, is mapped to A+8 subcarrier at frequency domain.
4. method according to claim 3 is characterized in that, further comprises:
The tenth descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain; The 11 descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain; The 12 descending special pilot frequency is mapped to the 3rd OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain; Perhaps
The tenth descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain; The 11 descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain; The 12 descending special pilot frequency is mapped to the 5th OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain; Perhaps
The tenth descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+2 subcarrier at frequency domain; The 11 descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+6 subcarrier at frequency domain; The 12 descending special pilot frequency is mapped to the 4th OFDM symbol in time domain, is mapped to A+10 subcarrier at frequency domain.
5. method according to claim 3 is characterized in that, A=1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810086465 CN101534265B (en) | 2008-03-15 | 2008-03-15 | Mapping method for special downlink pilot frequency and physical resource block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810086465 CN101534265B (en) | 2008-03-15 | 2008-03-15 | Mapping method for special downlink pilot frequency and physical resource block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101534265A CN101534265A (en) | 2009-09-16 |
| CN101534265B true CN101534265B (en) | 2013-05-01 |
Family
ID=41104658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810086465 Active CN101534265B (en) | 2008-03-15 | 2008-03-15 | Mapping method for special downlink pilot frequency and physical resource block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101534265B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552757B (en) * | 2008-04-04 | 2013-01-16 | 中兴通讯股份有限公司 | Mapping method of pilot frequency and physical resource block special for downstream and transmitting device thereof |
| CN102014527B (en) | 2009-09-29 | 2014-04-16 | 电信科学技术研究院 | Sending method and channel demodulation method, system and device of demodulation pilot frequency on return link |
| TW201141198A (en) * | 2009-10-20 | 2011-11-16 | Sony Corp | Frame mapping apparatus and method |
| CN102300270B (en) | 2010-06-25 | 2015-01-14 | 电信科学技术研究院 | Resource configuration method and device of return link control channel information |
| CN117424780A (en) * | 2023-09-19 | 2024-01-19 | 白盒子(上海)微电子科技有限公司 | Low-complexity channel estimation method combining frequency domain shaping and transform domain noise reduction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127747A (en) * | 2006-08-14 | 2008-02-20 | 大唐移动通信设备有限公司 | A method and system for frequency domain scheduling in time division duplex multiplexing system |
| CN101132384A (en) * | 2006-08-23 | 2008-02-27 | 大唐移动通信设备有限公司 | Method and apparatus for pilot frequency multiplexing in OFDM system |
| CN101132255A (en) * | 2006-08-23 | 2008-02-27 | 大唐移动通信设备有限公司 | Method and system for processing reference mark in OFDM system |
-
2008
- 2008-03-15 CN CN 200810086465 patent/CN101534265B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127747A (en) * | 2006-08-14 | 2008-02-20 | 大唐移动通信设备有限公司 | A method and system for frequency domain scheduling in time division duplex multiplexing system |
| CN101132384A (en) * | 2006-08-23 | 2008-02-27 | 大唐移动通信设备有限公司 | Method and apparatus for pilot frequency multiplexing in OFDM system |
| CN101132255A (en) * | 2006-08-23 | 2008-02-27 | 大唐移动通信设备有限公司 | Method and system for processing reference mark in OFDM system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101534265A (en) | 2009-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101350801B (en) | Method for mapping down special pilot frequency and physical resource block of long loop prefix frame structure | |
| CN102118868B (en) | Cell resources in cooperative measurement set during multipoint cooperative transmission mapping method and system | |
| CN101534265B (en) | Mapping method for special downlink pilot frequency and physical resource block | |
| CN103053123A (en) | Channel description feedback in a communication system | |
| CN101394262A (en) | Pilot transmission method and device in OFDM system | |
| CN114158090A (en) | Data sending method, data receiving and processing method and related equipment | |
| Zhao et al. | Constructed data pilot-assisted channel estimators for mobile environments | |
| CN109617575A (en) | A kind of method and apparatus in the UE for being used for multi-antenna transmission, base station | |
| CN110166087A (en) | IQ the is unbalance lower extensive MIMO-OFDM wireless communications method of pilot frequency multiplexing | |
| CN101815047B (en) | Method and device for mapping demodulation pilots and physical resource block | |
| CN101459453A (en) | Channel detection method | |
| CN101621325A (en) | Common pilot frequency hopping method in LTE system | |
| CN101616118B (en) | Mapping method of downlink special pilot frequency and physical resource block | |
| CN114221837B (en) | Frame structure indication method, frame structure updating method and related equipment | |
| CN106256158B (en) | A kind of pilot frequency collocation method and device | |
| WO2018112698A1 (en) | Method for transmitting signal, network device and terminal device | |
| CN101867948B (en) | Method for sending downlink intermediate pilot in wireless communication system | |
| CN101803320B (en) | Mapping method for beam forming dedicated pilot and physical resource block | |
| CN103379073B (en) | uplink noise estimation method | |
| CN110995627B (en) | Arrival time difference tracking method based on early-late loop | |
| CN101552757B (en) | Mapping method of pilot frequency and physical resource block special for downstream and transmitting device thereof | |
| CN110691055A (en) | Time-frequency offset joint estimation method in OQAM/OFDM | |
| CN107171993B (en) | Uplink joint carrier synchronization hardware implementation method based on large-scale MIMO | |
| Hussein et al. | Least Square Estimation‐Based Different Fast Fading Channel Models in MIMO‐OFDM Systems | |
| WO2023109734A1 (en) | Interference measurement method and apparatus, device, and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20090916 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Mapping method of pilot frequency and physical resource block special for downstream and transmitting device thereof Granted publication date: 20130501 License type: Common License Record date: 20151123 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |