CN102014096B - Device and method for mapping demodulated pilot frequency - Google Patents
Device and method for mapping demodulated pilot frequency Download PDFInfo
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Abstract
The invention discloses a device and a method for mapping a demodulating pilot frequency, aiming to guarantee the relative uniformity of pilot frequency resource expenses corresponding to each layer in different time slots of the same resource block. The method comprises the step of: configuring a plurality of mapping modes for the demodulated pilot frequency, and mapping the demodulated pilot frequency on the continuous resource blocks with same quantity to the mapping modes by selecting different mapping modes. Compared with the prior art, the device and the method for mapping the demodulated pilot frequency, provided in the invention, can ensure the density distribution of odd time slots and even time slots in each layer to be more uniform, therefore, the quality of channel evaluation is guaranteed.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of mapping device and method of demodulation pilot frequency.
Background technology
High-order multi-antenna technology is one of key technology of senior Long Term Evolution (Long Term Evolution Advanced, LTE-A or LTE-Advanced) system, can improve system transmission rate.In order to realize channel quality measurement and the data demodulates introduced after high-order multi-antenna technology, LTE-Advanced system has defined respectively two class frequency pilot signs: data demodulates pilot tone (DemodulationReference Signal, and channel quality measurement pilot tone (Channel State Information-Reference Signal, CSI-RS) DMRS).Wherein, demodulation pilot frequency is for the reference symbol of Physical Downlink Shared Channel (PhysicalDownlink Shared Channel, PDSCH) demodulation.Measurement pilot frequency is for channel condition information (channel state information, CSI) reference symbol of measuring is for channel quality instruction (Channel Quality Indicator, CQI), pre-coding matrix instruction (Precoding MatrixIndicator, PMI), stratum indicates reporting of information such as (Rank Indicator, RI).The structure of two class reference symbols can be for supporting as the new technical feature of the LTE-A such as multipoint cooperative (Coordinated Multi-Point, CoMP), spatial reuse.
The design principle of demodulation reference mark is that the concept based on the specific reference symbol of R8 UE expands to multilayer.But, adopt the specific reference symbol in R8 community not foreclose completely.
The maximum dedicated pilot number of layers of supporting due to UE in LTE R8 is one, and the maximum pilot tone that in R9, UE supports to become number be two, therefore the pilot design of layer one and layer two need to be considered the problem of backwards compatibility.
In LTE-A system, the maximum pilot tone number of layers of support is 8.In current research, the multiplex mode of demodulation pilot frequency is mainly considered following three kinds of patterns: frequency division multiplexing (Frequency DividedMultiplexing, FDM), time division multiplexing (Time Divided Multiplexing, TDM), code division multiplexing (Code Divided Multiplexing, CDM).The mode that merges FDM and CDM in the situation of high order is carried out the design of demodulation pilot frequency, is current study hotspot.
When while considering to make low-rank, every layer of corresponding pilot frequency locations is with high order, every layer of corresponding pilot frequency locations is consistent, often causes in the different time-gap (slot) of a Resource Block (RB), and every layer of corresponding pilot resources expense is not corresponding.
Summary of the invention
Technical problem to be solved by this invention, is to provide a kind of mapping device and method of demodulation pilot frequency, to ensure that every layer of corresponding pilot resources expense is relatively even in the different time-gap of a Resource Block.
In order to solve the problems of the technologies described above, the invention provides a kind of mapping method of demodulation pilot frequency, for described demodulation pilot frequency configures several mapping mode, on the continuous Resource Block identical from described mapping mode quantity, select different described mapping modes to carry out the mapping of described demodulation pilot frequency.
Preferably, the kind of described mapping mode is M kind, and on i Resource Block in a continuous M Resource Block, the mapping mode m (i) of corresponding demodulation pilot frequency is:
m(i)＝mod(mod(i，M)+offset)；
Wherein mod (i, M) represents the modulo operation of i to M, the positive integer that offset span is 0～M-1.
Preferably, described M is 2 o'clock, the corresponding a kind of mapping mode of the Resource Block of odd number index in continuous Resource Block, the corresponding another kind of mapping mode of Resource Block of even number index.
Preferably, in two adjacent Resource Block, wherein upper every layer of resource location in odd number time slot mapping is identical at the resource location of another Resource Block even number time slot with respective layer, and every layer of resource location in even number time slot mapping is identical at the resource location of this another Resource Block odd number time slot with respective layer.
Preferably, the actual layer using of system is divided into groups, on adjacent Resource Block, do not carry out on the same group the mapping of described demodulation pilot frequency according to different pilot densities.
Preferably, the layer of system support is divided into two groups, the Resource Unit position of shining upon on the Secondary resource piece of in second group each layer of the Resource Unit position of shining upon in first group the each layer first resource piece in two adjacent Resource Block in these two adjacent Resource Block is identical, and the each layer Resource Unit position on this Secondary resource piece shone upon of the each layer of Resource Unit position of shining upon on this first resource piece in second group in first group is identical.
Preferably, described Resource Unit position, comprises frequency domain position, time-domain position or time and frequency zone position.
Preferably, when described Resource Unit position is described frequency domain position, the OFDM symbol position of time domain keeps the characteristic of Resource Block separately constant; When described Resource Unit position is described time-domain position, on frequency domain position, keep the characteristic of Resource Block separately constant.
In order to solve the problems of the technologies described above, the present invention also provides a kind of mapping device of demodulation pilot frequency, comprises configuration module and mapping block, wherein:
Described configuration module is set to described demodulation pilot frequency and configures several mapping mode;
Described mapping block is arranged on the continuous Resource Block identical from described mapping mode quantity selects different described mapping modes to carry out the mapping of described demodulation pilot frequency.
Preferably, the kind of the described mapping mode of described configuration module configuration is M kind;
On i the Resource Block of described mapping block in a continuous M Resource Block, the mapping mode m (i) of corresponding demodulation pilot frequency is:
m(i)＝mod(mod(i，M)+offset)；
Wherein mod (i, M) represents the modulo operation of i to M, the positive integer that offset span is 0～M-1.
Compared with prior art, the mapping device of demodulation pilot frequency provided by the invention and method, can make every layer of density distribution at odd number time slot and even number time slot more even, thereby ensured the quality of channel estimating.Mapping device provided by the invention and method, by pilot frequency locations on the same group is not exchanged, avoid every layer of corresponding pilot resources problem pockety in the different time-gap (slot) of a Resource Block (RB), be more conducive to the mapping mode mapping of virtual RB.
Brief description of the drawings
Fig. 1 is the mapping schematic diagram of demodulation pilot frequency on Adjacent resource piece when two kinds of mapping modes in the present invention;
Fig. 2 a, Fig. 2 b and Fig. 2 c are respectively the mapping schematic diagram of demodulation pilot frequency in the inventive method the first embodiment;
Fig. 3 a, Fig. 3 b and Fig. 3 c are respectively the mapping schematic diagram of demodulation pilot frequency in the inventive method the second embodiment;
Fig. 4 a, Fig. 4 b and Fig. 4 c are respectively the mapping schematic diagram of demodulation pilot frequency in the inventive method the 3rd embodiment;
Fig. 5 is the composition schematic diagram of apparatus of the present invention embodiment.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical problem whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.
It should be noted that, if do not conflicted, each feature in the embodiment of the present invention and embodiment can mutually combine, all within protection scope of the present invention.In addition, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the flow chart of accompanying drawing, and, although there is shown logical order in flow process, but in some cases, can carry out shown or described step with the order being different from herein.
In the mapping method of the demodulation pilot frequency that the present invention proposes, for demodulation pilot frequency configures several mapping mode, on adjacent Resource Block, select different demodulation pilot frequency mapping modes to carry out the mapping of demodulation pilot frequency.As shown in Figure 1, in the time of two kinds of mapping modes of configuration mode (Pattern) A and Pattern B, taking Resource Block as unit, the mode of alternately shining upon according to Pattern A and Pattern B completes the mapping of demodulation pilot frequency, also ascend the throne and be set up two adjacent Resource Block, what when mapping, adopt is that different patterns is carried out.
While being provided with M kind mapping mode, on M continuous Resource Block, adopt respectively different mapping modes.The use order of this M kind mapping mode, can fix also and can not fix, also for x Resource Block in every M continuous Resource Block, can fix the x kind mapping mode that adopts this M kind mapping mode, also can adopt other mapping modes in this M kind mapping mode, wherein x and M are positive integer and 0 < x <=M, 0 < M.From the viewpoint of implementation complexity, the fixed design of the preferential employing of use order of mapping mode, to reduce complexity.
In the time of two kinds of mapping modes of configuration, in two adjacent Resource Block, wherein upper every layer of resource location in odd number time slot mapping is identical at the resource location of another Resource Block even number time slot with respective layer, and every layer of resource location in even number time slot mapping is identical at the resource location of this another Resource Block odd number time slot with respective layer.
Above-mentioned Resource Unit position, can be frequency domain position, and OFDM (OFDM) character position of time domain keeps the characteristic of RB separately constant; Also can be time-domain position, on frequency domain position, keep the characteristic of RB separately constant; It can also be time and frequency zone position.
The mapping relations of demodulation pilot frequency on adjacent Resource Block, can also divide into groups to the actual layer using of system (such as the maximum number of plies target zone of system support), on adjacent different resource piece, not shine upon according to different pilot densities on the same group.Particularly such as two whens group are set, the Resource Unit position of shining upon on first group of first resource piece in two adjacent Resource Block is identical with the Resource Unit position of shining upon on second group of Secondary resource piece in these two Resource Block, second group of Resource Unit position of shining upon on this first resource piece with first group in the each layer of Resource Unit position of shining upon on this Secondary resource piece identical.
In the time that the mapping mode of M kind demodulation pilot frequency is set, Resource Block index with the corresponding relation of demodulation pilot frequency mapping mode is: corresponding demodulation pilot frequency mapping mode index m (i) on i Resource Block, wherein:
M (i)=mod (mod (i, M)+offset) formula (1)
Wherein, mod (i, M) represents the modulo operation of i to M, the positive integer that offset span is 0～M-1.
In the time that two kinds of mapping modes (being M=2) are set, the mapping mode of demodulation pilot frequency is corresponding with Resource Block index, the corresponding the first mapping mode of odd number index Resource Block, the corresponding the second mapping mode of even number index Resource Block.
Compared with prior art, the mapping device of demodulation pilot frequency provided by the invention and method, can make every layer of density distribution at odd number time slot and even number time slot more even, thereby ensure the quality of channel estimating, especially in the time being greater than the situation of 2 RB for the resource of user assignment.Mapping device provided by the invention and method, the mapping mode that is more conducive to virtual RB shines upon, and in the time that RB number is greater than 2, can find out from specific embodiment, and every layer of corresponding demodulation pilot frequency density of odd number time slot and even number time slot is close.
For the ease of understanding device and method described in the invention, below by specific embodiment, the specific embodiment of the present invention is described.In the first embodiment, the maximum number of layers of system support is divided into two groups, between two groups, carries out code division multiplexing, carry out frequency division and/or time division multiplexing in same group.In second and third embodiment, the maximum number of layers of system support is divided into four groups, between group, adopt code division multiplexing, in group, adopt frequency division and/or time division multiplexing.In the following embodiments, all describe as an example of LTE R8 normal cyclic prefix length example.
The first embodiment
Fig. 2 a, Fig. 2 b and Fig. 2 c illustrated respectively when the maximum number of layers of system be 8 but in different actual use number of layers situation, the mapping mode of demodulation pilot frequency in two adjacent Resource Block.
In the present embodiment, the number of layers of the actual use of system is 8, and by layer, { 1,2,3,4} is divided into one group, and { 5,6,7,8} is divided into one group to layer, and same group is carried out frequency division multiplexing, and the different layers between group carries out code division multiplexing.The layer corresponding relation that carries out code division multiplexing in two groups is: { 1,5} carries out code division multiplexing to layer, and { 2,6} carries out code division multiplexing to layer, and { 3,7} carries out code division multiplexing to layer, and { 4,8} carries out code division multiplexing to layer, and in this situation, CDM code length is 2.In the present embodiment, Resource Block is that the mode while adopting LTE normal cyclic prefix defines.
With layer, { these two layers of 1,5}, for reference, illustrate the feature of the present embodiment.Due to layer, { 1,5} carries out code division multiplexing, and the resource location that they take is identical.In k RB, { 1,5} is the 6th and the 7th OFDM symbol in the Resource Unit position of odd number time slot and even number Time Slot Occupancy in time domain to layer.And be the 2nd and the 10th Resource Unit (subcarrier) of the corresponding OFDM symbol of this Resource Block at frequency domain even number time slot, odd number time slot is the 6th subcarrier of the corresponding OFDM symbol of this Resource Block.Obviously the density of even number time slot is greater than the density of odd number time slot.
In order to make the density of odd even time slot suitable, on k+1 Resource Block, keep in the constant situation of the time-domain symbol that takies, become the 6th subcarrier of this Resource Block in the mapping position of the demodulation pilot frequency of frequency domain even number time slot, identical with the odd number time slot of k Resource Block; Mapping position at the demodulation pilot frequency of odd number time slot becomes the 2nd and the 10th Resource Unit, identical with the even number time slot of k Resource Block.
For other layers, { 1,5} similarly processes with layer.
In addition, as shown in Figure 2 b, illustrated that the maximum number of layers of system support is 8, but reality is only used, { 1,2,3,4} is the mapping mode of totally 4 layers, and this kind of situation is the subset of situation shown in Fig. 2 a, and 4 layers belong to one group.A subset during as 8 layers, layer 1,2,3,4 take respectively and identical RE position 8 layers time shown in Fig. 2 a, during simultaneously with 8 layers of code division multiplexing shown in Fig. 2 a, adopt identical processing mode, each layer carries out spread spectrum on two adjacent RE, adopts the mode of frequency division and/or time-division to carry out multiplexing between layer simultaneously.Difference shown in this situation and Fig. 2 a 8 layers time is: now due to 5,6,7,8 layers do not exist, and therefore layer 1,2,3,4 does not need to carry out code division multiplexing with other layers.
In addition, as shown in Figure 2 c, illustrate that the maximum number of layers of system support is at 8 o'clock, but the actual mapping mode that only uses 2 layers, this kind of situation is the subset of situation shown in Fig. 2 a and 2b, { 1,2} belongs to one group to layer.Be now 8 layers and total number of layers of using subset while being 4 layers as the total number of layers using, owing to only having 2 layers, between layer 1 and layer 2, carry out the multiplexing of frequency division and/or time-division.
Can be found out by the embodiment shown in Fig. 2 a, Fig. 2 b and Fig. 2 c, after the processing of technical solution of the present invention, in two adjacent Resource Block, the Resource Unit density that in odd even time slot, the demodulation pilot frequency of every layer is corresponding is identical.In the different situation of the number of layers that simultaneously uses corresponding to system, each layer of corresponding RE position is identical with processing mode, thereby reduces the complexity of receiving terminal channel estimating.
The second embodiment
Fig. 3 a, Fig. 3 b and Fig. 3 c have illustrated the another kind of mapping mode of demodulation pilot frequency in two adjacent Resource Block.The maximum number of layers that system support is still set in the present embodiment is 8.The layer corresponding relation that carries out code division multiplexing in the present embodiment is: { 1,2,5,6} carries out code division multiplexing to layer, and { 3,4,7,8} carries out code division multiplexing to layer, and therefore the code length of CDM is 4.In the present embodiment, the definition mode of Resource Block is the mode while adopting LTE normal cyclic prefix equally.
Now, with layer, { this group of 1,2,5,6} layer of carrying out code division multiplexing is for reference to feature of the present invention is described.In k RB, layer { 1,2,5,6} is the 6th and the 7th OFDM symbol in the Resource Unit position of odd number time slot and even number Time Slot Occupancy in time domain, and is the 2nd of the corresponding OFDM symbol of this Resource Block at frequency domain even number time slot, the 3 and the 10th, 11 Resource Units (subcarrier), odd number time slot is the 6th of the corresponding OFDM symbol of this Resource Block, 7 subcarriers.
In order to make the density of odd even time slot suitable, on k+1 Resource Block, keep in the constant situation of the time-domain symbol that takies, become the 6th of this Resource Block in the mapping position of the demodulation pilot frequency of frequency domain even number time slot, 7 Resource Units are identical with the odd number time slot of k Resource Block; Mapping position at the demodulation pilot frequency of odd number time slot becomes the 2nd, and the 3 and the 10th, 11 Resource Units are identical with the even number time slot of k Resource Block.
For layer, { 3,4,7,8} similarly processes.
In another embodiment, above-mentioned grouping can be also that { 1,2,5,7} is divided into one group to layer, and { 3,4,6,8} is divided into another group to layer.
In addition, as shown in Figure 3 b, illustrated that the maximum number of layers of system support is at 8 o'clock, but the actual situation that only uses 4 layers, by layer, { 1,2} is divided into one group, { 3,4} is divided into another group to layer, and this kind of situation is the subset of situation shown in Fig. 3 a, Ji Cizhong situation lower floor 1～4 during completely according to situation shown in Fig. 3 a 1～4 layer of mapping of layer identical, difference, because layer 5～8 does not exist, therefore only has layer { between 1,2}, to carry out code division multiplexing, layer { carries out code division multiplexing between 3,4}; Between two groups, carry out frequency division and/or time division multiplexing.
In addition, as shown in Figure 3 c, illustrated that the maximum number of layers of system support is at 8 o'clock, but the actual situation that only uses 2 layers, this kind of situation is the subset of situation shown in Fig. 3 a and Fig. 3 b, and { 1,2} belongs to one group to layer, shines upon between two-layer in the mode of code division multiplexing.
Can be found out by Fig. 3 a, Fig. 3 b and Fig. 3 c, after the processing of technical solution of the present invention, in two adjacent Resource Block, the Resource Unit density that in odd even time slot, the demodulation pilot frequency of every layer is corresponding is identical.
The 3rd embodiment
In Fig. 4 a, Fig. 4 b and Fig. 4 c, illustrate another in a RB, the different mapping mode schematic diagram of demodulation pilot frequency density that different layers is corresponding.In the present embodiment, { 1,2,5,6} carries out code division multiplexing to layer, and { 3,4,7,8} carries out code division multiplexing to layer in the drawings.In the present embodiment, the definition mode of Resource Block is the situation explanation during with LTE normal cyclic prefix equally.
In the present embodiment, { pilot density of 1,2,5,6} in same RB is identical, and { pilot density of 3,4,7,8} in same RB is identical for layer for layer.As shown in Figure 4, { 1,2,5,6} has taken altogether 16 RE to layer in k Resource Block, and layer { 3,4,7,8} has taken 8 RE altogether.
Be uniformly distributed feature in order to realize, in adjacent (k+1) individual Resource Block, { { the Resource Unit position that 3,4,7,8} takies in k Resource Block is identical with layer in the RE position that 1,2,5,6} takies for layer; And layer the Resource Unit position that 3,4,7,8} takies in (k+1) individual Resource Block with layer { the Resource Unit position that 1,2,5,6} takies in k Resource Block is identical.
In addition, as shown in Figure 4 b, illustrated that the maximum number of layers of system support is at 8 o'clock, but the actual situation that only uses 4 layers, by layer, { 1,2} is divided into one group, { 3,4} is divided into another group to layer, and this kind of situation is the subset of situation shown in Fig. 4 a, now layer 1～4 is completely identical according to the mapping in situation middle level 1～4 shown in Fig. 4 a, difference, because layer 5～8 does not exist, therefore only has layer { between 1,2}, to carry out code division multiplexing, layer { carries out code division multiplexing between 3,4}; Between two groups, carry out frequency division and/or time division multiplexing.
In addition, as shown in Fig. 4 c, illustrated that the maximum number of layers of system support is at 8 o'clock, but the actual situation that only uses 2 layers, this kind of situation is the subset of situation shown in Fig. 4 a and Fig. 4 b, and { 1,2} belongs to one group to layer, shines upon between two-layer in the mode of code division multiplexing.
By processing above, can draw according to two continuous RB, the pilot density of each layer of corresponding DMRS is identical.
Fig. 5 is the composition schematic diagram of apparatus of the present invention embodiment.As shown in Figure 5, apparatus of the present invention mainly comprise configuration module 510 and mapping block 520, wherein:
Wherein, when the kind of this mapping mode that this configuration module 510 configures is M kind, on i the Resource Block of this mapping block 520 in a continuous M Resource Block, the mapping mode k (i) of corresponding demodulation pilot frequency is suc as formula shown in (1).
In the time that M is 2, this mapping block 520 is selected a kind of mapping mode for the Resource Block of odd number index in continuous Resource Block, for the Resource Block of even number index is selected another kind of mapping mode.Further, in two Resource Block, upper every layer of resource location in odd number time slot mapping is identical at the resource location of another Resource Block even number time slot with respective layer, and every layer of resource location in even number time slot mapping is identical at the resource location of this another Resource Block odd number time slot with respective layer
This mapping block 520 divides into groups to the actual layer using of system, on adjacent Resource Block, does not carry out on the same group the mapping of demodulation pilot frequency according to different pilot densities.Typically, the layer of system support can be divided into two groups by this mapping block 520, the Resource Unit position of shining upon on the Secondary resource piece of in second group each layer of the Resource Unit position of shining upon in first group the each layer first resource piece in two adjacent Resource Block in these two adjacent Resource Block is identical, and the each layer Resource Unit position on this Secondary resource piece shone upon of the each layer of Resource Unit position of shining upon on this first resource piece in second group in first group is identical.
It should be noted that, in aforesaid method the first embodiment and the second embodiment, only provided the identical situation of time-domain position of odd number time slot and even number time slot demodulation pilot frequency, therefore just replace the position of frequency domain.When in the odd number time slot situation different with the demodulation pilot frequency time-domain position of even number time slot, also can only replace frequency domain position, or time-domain position and frequency domain position all replace, or only to time-domain position displacement, frequency domain position is not replaced.
In method first, second and the 3rd embodiment, the packet mode of each layer is only used to be convenient to illustrate thought of the present invention, comprises equally within the scope of the present invention for other packet modes in addition.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
Although the disclosed execution mode of the present invention as above, the execution mode that described content just adopts for the ease of understanding the present invention, not in order to limit the present invention.Technical staff in any the technical field of the invention; do not departing under the prerequisite of the disclosed spirit and scope of the present invention; can do any amendment and variation what implement in form and in details; but scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims was defined.
Claims (9)
1. the mapping method of a demodulation pilot frequency, it is characterized in that, for described demodulation pilot frequency configures several mapping mode, on the continuous Resource Block identical from described mapping mode quantity, select different described mapping modes to carry out the mapping of described demodulation pilot frequency: the layer of system support is divided into two groups, the Resource Unit position of shining upon on the Secondary resource piece of in second group each layer of the Resource Unit position of shining upon in first group the each layer first resource piece in two adjacent Resource Block in these two adjacent Resource Block is identical, the each layer Resource Unit position on this Secondary resource piece shone upon of the each layer of Resource Unit position of shining upon on this first resource piece in second group in first group is identical.
2. the method for claim 1, is characterized in that:
The kind of described mapping mode is M kind, and on i Resource Block in a continuous M Resource Block, the mapping mode m (i) of corresponding demodulation pilot frequency is:
m(i)=mod(mod(i,M)+offset)；
Wherein mod (i, M) represents the modulo operation of i to M, the positive integer that offset span is 0～M-1.
3. method as claimed in claim 2, is characterized in that:
Described M is 2 o'clock, the corresponding a kind of mapping mode of the Resource Block of odd number index in continuous Resource Block, the corresponding another kind of mapping mode of Resource Block of even number index.
4. method as claimed in claim 3, is characterized in that:
In two adjacent Resource Block, wherein upper every layer of resource location in odd number time slot mapping is identical at the resource location of another Resource Block even number time slot with respective layer, and every layer of resource location in even number time slot mapping is identical at the resource location of this another Resource Block odd number time slot with respective layer.
5. the method for claim 1, is characterized in that:
On adjacent Resource Block, do not carry out on the same group the mapping of described demodulation pilot frequency according to different pilot densities.
6. method as described in claim 1, is characterized in that:
Described Resource Unit position, comprises frequency domain position, time-domain position or time and frequency zone position.
7. method as claimed in claim 6, is characterized in that:
When described Resource Unit position is described frequency domain position, the OFDM symbol position of time domain keeps the characteristic of Resource Block separately constant;
When described Resource Unit position is described time-domain position, on frequency domain position, keep the characteristic of Resource Block separately constant.
8. a mapping device for demodulation pilot frequency, is characterized in that, this device comprises configuration module and mapping block, wherein:
Described configuration module is set to described demodulation pilot frequency and configures several mapping mode;
Described mapping block is arranged on the continuous Resource Block identical from described mapping mode quantity selects different described mapping modes to carry out the mapping of described demodulation pilot frequency: the layer of system support is divided into two groups, the Resource Unit position of shining upon on the Secondary resource piece of in second group each layer of the Resource Unit position of shining upon in first group the each layer first resource piece in two adjacent Resource Block in these two adjacent Resource Block is identical, and the each layer Resource Unit position on this Secondary resource piece shone upon of the each layer of Resource Unit position of shining upon on this first resource piece in second group in first group is identical.
9. device as claimed in claim 8, is characterized in that:
The kind of the described mapping mode of described configuration module configuration is M kind;
On i the Resource Block of described mapping block in a continuous M Resource Block, the mapping mode m (i) of corresponding demodulation pilot frequency is:
m(i)=mod(mod(i,M)+offset)；
Wherein mod (i, M) represents the modulo operation of i to M, the positive integer that offset span is 0～M-1.
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| CN101212416A (en) * | 2007-12-25 | 2008-07-02 | 中兴通讯股份有限公司 | Physical channel mapping method |
| CN101350801A (en) * | 2008-03-20 | 2009-01-21 | 中兴通讯股份有限公司 | Method for mapping down special pilot frequency and physical resource block of long loop prefix frame structure |
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| CN101212416A (en) * | 2007-12-25 | 2008-07-02 | 中兴通讯股份有限公司 | Physical channel mapping method |
| CN101350801A (en) * | 2008-03-20 | 2009-01-21 | 中兴通讯股份有限公司 | Method for mapping down special pilot frequency and physical resource block of long loop prefix frame structure |
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