CN103580843B - Channel mapping method and device - Google Patents
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Abstract
The invention provides a channel mapping method and device, and provides a mechanism of channel mapping, wherein the processing resources and the storing resources can be saved in the channel mapping process, and the implementation cost is reduced. The channel mapping method comprises the steps that the bit data cached in a first cache are read, and the scrambling processing is carried out on the bit data to generate first data; layering mapping is carried out on the first data to obtain second data mapped on at least one layer; RE mapping is carried out on the second data to obtain third data mapped on a virtual resource block corresponding to the layer; modulation is carried out on the third data to obtain complex value data, and precoding is carried out on the complex value data to obtain antenna data mapped on at least one antenna port; the antenna data are cached through a second cache; the antenna data in the second cache are read, and orthogonal frequency division multiplexing signals are generated based on the antenna data. The channel mapping method and device are used for saving the storing resources and the processing resources in the channel mapping.
Description
Technical field
The present invention relates to the communications field, more particularly, to a kind of channel mapping method and device.
Background technology
At present, in the lte(long term evolution of base station side, Long Term Evolution) in downlink, to descending
Pdsch(physical downlink shared channel, downlink physical shared channel) link has high-performance, low internal memory
The demand consuming, due to above-mentioned requirements, would generally realize framework to replace software real using hardware accelerator in the prior art
Existing framework.
Because the signal in physical layer transmission is all ofdm(orthogonal frequency division
Multiplexing, OFDM) symbol, so hardware accelerator carries out lte descending pdsch process in the prior art
When, the data of physical channel will be mapped to from transmission channel, deliver on antenna port after the process of a series of bottom, then
The transmission eated dishes without rice or wine, concrete handling process is as shown in Figure 1.
First, the bit data in code word is scrambled, different scramblers are used to each cell, so that cell is dry
Disturb randomization, thus reducing the interference between each cell；After completing the scrambling processes of bit data, then to the bit after scrambling
Data is modulated, and the bit data after scrambling is modulated to complex-valued data, then the complex-valued data in each code word is carried out
Layer mapping, complex value modulation data is mapped on one or more layer；And different according to the antenna technology selecting, and adopt
Different layer mappings.After completing the layer mapping of complex-valued data, precoding is carried out to the complex-valued data after layer mapping, by complex-valued data
It is mapped on corresponding antenna port, then resource particle mapping is carried out to the complex-valued data after precoding, complex-valued data is mapped
To on virtual resource blocks, then again to each antenna port data genaration complex-valued data time domain ofdm signal.
Above-mentioned prior art is to carry out the process of above-mentioned steps one by one according to code word, and all accurate in all complex-valued datas
Process from front to back according to ofdm symbol order after getting ready, generate ofdm signal.It is thus desirable in re(resource
Element, resource particle) place tti ram(transmission time interval random access after mapping
Memory, Transmission Time Interval random access memory) to store tti, (transmission time interval, during transmission
Between be spaced) complex-valued data of level, concrete structure is as shown in Figure 2.
In fig. 2, after resource particle mapping, tti level complex-valued data is stored, so as to each antenna port number
According to generation complex-valued data time domain ofdm signal.
Due to being all that complex-valued data is processed in layer mapping and resource particle mapping, and also need to store after resource particle mapping
Tti level complex-valued data, so not only larger resource consumption can be caused when processing, and will also result in larger data storage money
Source consumes, and improves the cost of realization simultaneously.
Content of the invention
Embodiments of the invention provide a kind of channel mapping method and device, there is provided a kind of mechanism of channel mapping, energy
Enough ensure saving process resource and storage resource in channel mapping process, reduce cost of implementation.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that
A kind of first aspect, there is provided channel mapping device, described device includes:
First caching, for the bit data of caching；
Scrambling unit, for reading the bit data of caching in the first caching, and carries out scrambling life to described bit data
Become the first data；
Layer map unit, for carrying out layer mapping to described first data, obtains be mapped at least one layer second
Data；
Resource particle re map unit, for carrying out re mapping to described second data, obtains being mapped in described layer correspondence
Virtual resource blocks on the 3rd data；
Modulation and precoding unit, for being modulated obtaining complex-valued data to described 3rd data, and to described complex value
Data carries out precoding, obtains the antenna data being mapped at least one antenna port；
Second caching, for caching described antenna data；
Signal generation unit, for reading the described antenna data in described second caching, and is based on described antenna data
Generate orthogonal frequency-division multiplex singal.
In conjunction with a first aspect, in the first possible implementation in first aspect, described scrambling unit specifically for:
Read the bit data of the first symbol of caching in described first caching, according to each resource particle re default
The code word of every layer of mapping, is the j-th layer of corresponding bit data assigned code font size of i-th re in described first symbol；
Described jth is obtained according to described j-th Layer assignment code word number and the corresponding bit data length of described j-th floor
The required bit data of individual layer mapping；
The described j-th layer required bit data of mapping is scrambled, is obtained described first data, described first data
For the bit data after described j-th layer corresponding scrambling；The initial value of wherein i, j is 1, and i, j are positive integer.
In conjunction with the first possible implementation of first aspect, in the possible implementation of second, described by institute
State the j-th layer of required bit data of mapping to carry out mapping and process including:
Described layer map unit specifically for:
The described j-th layer bit data mapping after corresponding scrambling is carried out layer mapping, obtains described second data, institute
State the bit data that the second data is after described j-th layer corresponding layer mapping.
In conjunction with the possible practising way of the second of first aspect, in the third possible implementation, described re reflects
Penetrate unit specifically for:
Bit data after described j-th layer corresponding layer mapping is carried out re mapping, generates described j-th layer of mapping
Bit data on virtual resource blocks；
After obtaining described j-th layer of the bit data being mapped on virtual resource blocks, to+1 layer of corresponding bit of jth
Data duplication executes described scrambling, the mapping of described layer and described re mapping, until what all layers obtaining described i-th re reflected
It is mapped in the bit data on virtual resource blocks, obtains described 3rd data, described 3rd data is mapped in for described i-th re
Bit data on virtual resource blocks.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, described modulation
And precoding unit specifically for:
The bit data that described i-th re is mapped on virtual resource blocks is modulated being converted to complex-valued data；
By described complex-valued data after precoding, re-map corresponding antenna port, obtain being mapped at least one
The antenna data of described i-th re on antenna port；
In the antenna data obtaining described i-th re, i+1 re is mapped in the bit data weight on virtual resource blocks
Execute described modulation, described precoding again, the antenna number of the described i+1 re obtaining being mapped at least one antenna port
According to until obtaining the antenna data of all re of described first symbol.
In conjunction with first aspect in the 4th kind of arbitrary possible implementation of first aspect, the 5th kind of possible realization side
In formula,
Described first symbol is OFDM ofdm symbol；
The code word number of every layer of mapping of each re described is that the mapping relations according to code word to floor to re obtain, described code
Word pre-sets to layer to the mapping relations of re.
In conjunction with first aspect in the 4th kind of arbitrary possible implementation of first aspect, the 6th kind of possible realization side
In formula,
Described first caches as Transmission Time Interval tti level caching；Described second caches as symbol level caching；
Described first caching and described second caches as ping-pong structure caching.
A kind of second aspect, there is provided channel mapping method, methods described includes:
Read the bit data of caching in the first caching, and described bit data is carried out with scrambling and generate the first data；
Layer mapping is carried out to described first data, obtains the second data being mapped at least one layer；
The mapping of resource particle re is carried out to described second data, obtains being mapped on the corresponding virtual resource blocks of described layer
3rd data；
It is modulated obtaining complex-valued data to described 3rd data, and precoding is carried out to described complex-valued data, reflected
Penetrate the antenna data at least one antenna port；
Cache described antenna data by using the second caching；
Read the described antenna data in described second caching, and OFDM letter is generated based on described antenna data
Number.
In conjunction with second aspect, in the first possible implementation in second aspect, described reading in the first caching caches
Bit data, and described bit data is carried out scrambling generate the first data include:
Read the bit data of the first symbol of caching in described first caching, according to every layer of mapping of each re default
Code word, be the j-th layer of corresponding bit data assigned code font size of i-th re in described first symbol；
Described jth is obtained according to described j-th Layer assignment code word number and the corresponding bit data length of described j-th floor
The required bit data of individual layer mapping；
The described j-th layer required bit data of mapping is scrambled, is obtained described first data, described first data
For the bit data after described j-th layer corresponding scrambling；The initial value of wherein i, j is 1, and i, j are positive integer.
The first possible implementation in conjunction with second aspect, in the possible implementation of second, described to described
First data carries out layer mapping, and the second data obtaining being mapped at least one layer includes:
The described j-th layer bit data mapping after corresponding scrambling is carried out layer mapping, obtains described second data, institute
State the bit data that the second data is after described j-th layer corresponding layer mapping.
In conjunction with the possible implementation of the second of second aspect, in the third possible implementation, described to institute
State the second data and carry out the mapping of resource particle re, obtain the 3rd packet being mapped on the corresponding virtual resource blocks of described layer
Include:
Bit data after described j-th layer corresponding layer mapping is carried out re mapping, generates described j-th layer of mapping
Bit data on virtual resource blocks；
After obtaining described j-th layer of the bit data being mapped on virtual resource blocks, to+1 layer of corresponding bit of jth
Data duplication executes described scrambling, the mapping of described layer and described re mapping, until what all layers obtaining described i-th re reflected
It is mapped in the bit data on virtual resource blocks, obtains described 3rd data, described 3rd data is mapped in for described i-th re
Bit data on virtual resource blocks.
In conjunction with the third possible implementation of second aspect, in the 4th kind of possible implementation, described to institute
State the 3rd data and be modulated obtaining complex-valued data, and precoding is carried out to described complex-valued data, obtain being mapped at least one
Antenna data on antenna port includes:
The bit data that described i-th re is mapped on virtual resource blocks is modulated being converted to complex-valued data；
By described complex-valued data after precoding, re-map corresponding antenna port, obtain being mapped at least one
The antenna data of described i-th re on antenna port；
In the antenna data obtaining described i-th re, i+1 re is mapped in the bit data weight on virtual resource blocks
Execute described modulation, described precoding again, the antenna number of the described i+1 re obtaining being mapped at least one antenna port
According to until obtaining the antenna data of all re of described first symbol.
In conjunction with the 4th kind of arbitrary possible implementation of second aspect to second aspect, the 5th kind of possible realization side
In formula,
Described first symbol is OFDM ofdm symbol；
The code word number of every layer of mapping of described each re default is that the mapping relations according to code word to floor to re obtain,
Described code word pre-sets to layer to the mapping relations of re.
The invention provides a kind of channel mapping method and device, the ratio of caching in channel mapping device reading first caching
Special data, and bit data is carried out with scrambling generation the first data；Layer mapping is carried out to the first data, obtains being mapped at least one
The second data on individual layer；The mapping of resource particle re is carried out to the second data, obtains being mapped on the corresponding virtual resource blocks of layer
The 3rd data；Be modulated obtaining complex-valued data to the 3rd data, and precoding carried out to complex-valued data, obtain being mapped in
Antenna data on a few antenna port；By using the second caching caching antenna data；Read the antenna in the second caching
Data, and orthogonal frequency-division multiplex singal is generated based on antenna data.Thus providing a kind of mechanism of channel mapping, ensure that
Saving process resource in channel mapping process and storage resource, reduce cost of implementation.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of existing channel mapping method；
Fig. 2 is the structural representation of existing another kind channel mapping device；
Fig. 3 is a kind of schematic flow sheet of channel mapping method provided in an embodiment of the present invention；
Fig. 4 is a kind of schematic flow sheet of channel mapping method provided in an embodiment of the present invention；
Fig. 5 is a kind of structural representation of channel mapping device provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of channel mapping device provided in an embodiment of the present invention；
Fig. 7 is a kind of structural representation of channel mapping device provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
The invention provides a kind of channel mapping method, it is applied to a kind of channel mapping device, as shown in figure 3, described side
Method includes:
101st, read the bit data of caching in the first caching, and bit data is carried out with scrambling and generate the first data.
102nd, layer mapping is carried out to the first data, obtain the second data being mapped at least one layer.
103rd, the mapping of resource particle re is carried out to the second data, obtain be mapped on the corresponding virtual resource blocks of layer the 3rd
Data.
104th, it is modulated obtaining complex-valued data to the 3rd data, and precoding is carried out to complex-valued data, be mapped in
Antenna data at least one antenna port.
105th, by using the second caching caching antenna data.
106th, read the antenna data in the second caching, and orthogonal frequency-division multiplex singal is generated based on antenna data.
Code word pre-sets to layer to the mapping relations of re in embodiments of the present invention, and every layer that obtains each re reflects
The code word number penetrated specifically can be by: firstly, since after floor mapping and re mapping, code word can be mapped to one or more
On layer, and each layer of meeting is mapped on a re, so first passing through software layer to obtain code word to layer to the mapping relations of re, then
It is calculated the code word number that the corresponding each floor of each re is mapped according to the mapping relations of code word to floor to re.Wherein, code word
Number it is numbering code word being carried out in order to distinguish different code words.
Moreover, it is noted that in embodiments of the present invention, " first " in the first symbol not refers in particular to a certain symbol
Number, it is not the sequence number representing symbol, it is only for conveniently distinguished with other symbols.
The invention provides a kind of channel mapping method, read the bit data of caching in the first caching, and to bit number
Generate the first data according to carrying out scrambling；Layer mapping is carried out to the first data, obtains the second data being mapped at least one layer；
The mapping of resource particle re is carried out to the second data, obtains the 3rd data being mapped on the corresponding virtual resource blocks of layer；To the 3rd
Data is modulated obtaining complex-valued data, and carries out precoding to complex-valued data, obtains being mapped at least one antenna port
Antenna data；By using the second caching caching antenna data；Read the antenna data in the second caching, and be based on antenna number
According to generation orthogonal frequency-division multiplex singal.Thus providing a kind of mechanism of channel mapping, ensure that in channel mapping process
Saving process resource and storage resource, reduce cost of implementation.
In order that those skilled in the art can be more clearly understood that technical scheme provided in an embodiment of the present invention, lead to below
Cross specific embodiment, another kind of channel mapping method that another embodiment of the present invention is provided is described in detail, in this reality
Apply in example taking lte system as a example, symbol is all ofdm symbol, in addition, in order to aspect illustrates, in embodiments below, by resource
Particle is referred to as re, as shown in figure 4, the method includes:
201st, for j-th Layer assignment code word number of i-th re of k-th ofdm symbol.
Exemplary and corresponded to 13 ofdm symbols it is assumed that pending data is 26 code words, this 26 code words
Be stored in advance in tti ram(random access memory, random access memory) in (tti ram be tti level table tennis
The caching of structure), then first pass through software layer and obtain code word to layer to the mapping relations of re, then arrive re's according to code word to layer
Mapping relations are calculated the code word number that the corresponding each floor of each re is mapped, and obtain every layer of each re of code word number.
Then just can according to the code word number of every layer of each re obtaining, be k-th ofdm symbol i-th re
J Layer assignment code word number, wherein, k, j, i are positive integer, and k, and the initial value of j, i is all 1.
202nd, the code word number of j-th Layer assignment of i-th re according to k-th ofdm symbol and the corresponding bit of this floor
Data length obtains this layer of required bit data of mapping.
Exemplary, j-th layer of corresponding bit data length is to be obtained according to the j-th layer of modulation technique being adopted
, such as qpsk corresponding bit data length is 2bit, and 16qam corresponding bit data length is 4bit, and 64qam is corresponding
Bit data length is 6bit.
Then, the code word number according to j-th Layer assignment and the corresponding bit data length of j-th floor obtain the mapping of this floor
Required bit data.
203rd, the j-th layer of required bit data of mapping of i-th re of k-th ofdm symbol is scrambled.
204th, after scrambling, the j-th layer of required bit data of mapping of i-th re of k-th ofdm symbol is carried out
Layer mapping.
205th, after layer mapping, the j-th layer of required bit data of mapping of i-th re of k-th ofdm symbol is entered
Row re maps.
Specifically it is simply that mapping bit data required for the j-th layer of mapping of i-th re to k-th ofdm symbol
To on virtual resource blocks (resource block, rb).
After the j-th layer of required bit data of mapping of i-th re carries out re mapping, j plus 1, to i-th re's
Next layer execution 201～205, until all layers of i-th re all complete re mapping.At i-th to k-th ofdm symbol
After all layers of re complete re mapping, just obtain the bit data after the mapping of i-th re.
206th, the bit data after the mapping of i-th re of k-th ofdm symbol is modulated and coded treatment.
Specifically, the bit data to i-th re (i.e. bit data after all layers of mapping of i-th re) is modulated
Process, the bit data of i-th re is converted into complex-valued data, thus the complex-valued data after obtaining the modulation of i-th re.
After completing modulation, precoding processing is carried out to the complex-valued data after the modulation of i-th re, then by i-th re
Precoding after complex-valued data be mapped to corresponding antenna port, obtain the corresponding antenna data of i-th re.
207th, preserve the corresponding antenna data of i-th re of k-th ofdm symbol.
After the antenna data of i-th re of k-th ofdm symbol preserves, i plus 1, the next re of i-th re is held
Row 201～206, until the corresponding antenna data of all re of k-th ofdm symbol all preserves.Institute in k-th ofdm symbol
After having the corresponding antenna data of re all to complete to preserve, just obtain the antenna data of k-th ofdm symbol.
Wherein, the corresponding antenna data of each re is saved in the caching of the ping-pong structure of symbol arm(symbol level) in.
208th, the antenna data according to k-th ofdm symbol generates transmission signal (ofdm signal).
According to after the antenna data of k-th ofdm symbol generates transmission signal, k plus 1, next ofdm symbol is held
Row 201～207, until generate the corresponding transmission signal of all ofdm symbols.In sum, mapping device in the present embodiment
Structure can be as shown in Figure 5.
The invention provides a kind of channel mapping method, read the bit data of caching in the first caching, and to bit number
Generate the first data according to carrying out scrambling；Layer mapping is carried out to the first data, obtains the second data being mapped at least one layer；
The mapping of resource particle re is carried out to the second data, obtains the 3rd data being mapped on the corresponding virtual resource blocks of layer；To the 3rd
Data is modulated obtaining complex-valued data, and carries out precoding to complex-valued data, obtains being mapped at least one antenna port
Antenna data；By using the second caching caching antenna data；Read the antenna data in the second caching, and be based on antenna number
According to generation orthogonal frequency-division multiplex singal.Thus providing a kind of mechanism of channel mapping, ensure that in channel mapping process
Saving process resource and storage resource, reduce cost of implementation.
The present invention provides a kind of channel mapping device 1, as shown in fig. 6, this channel mapping device 1 includes:
First caching 11, for the bit data of caching.
Scrambling unit 12, for reading the bit data of caching in the first caching 11, and carries out scrambling life to bit data
Become the first data.
Layer map unit 13, for carrying out layer mapping to the first data, obtains the second number being mapped at least one layer
According to.
Re map unit 14, for carrying out re mapping to the second data, obtains being mapped on the corresponding virtual resource blocks of layer
The 3rd data.
Modulation and precoding unit 15, for being modulated obtaining complex-valued data to the 3rd data, and enter to complex-valued data
Row precoding, obtains the antenna data being mapped at least one antenna port.
Second caching 16, for caching antenna data.
Signal generation unit 17, for reading the antenna data in the second caching 16, and is generated orthogonal based on antenna data
Frequency-division multiplex singal.
Optionally, scrambling unit 12 is additionally operable to:
Read the bit data of the first symbol of caching in the first caching 11, every according to each resource particle re default
The code word of layer mapping, is the j-th layer of corresponding bit data assigned code font size of i-th re in the first symbol；
According to needed for j-th Layer assignment code word number and the corresponding bit data length of j-th floor obtain j-th floor mapping
Bit data；
The j-th layer of required bit data of mapping is scrambled, is obtained the first data, the first data is right for j-th layer
Bit data after the scrambling answered；The initial value of wherein i, j is 1, and i, j are positive integer.
Optionally, layer map unit 13 is additionally operable to:
The j-th layer of bit data mapping after corresponding scrambling is carried out layer mapping, obtains the second data, the second data is
Bit data after j-th layer of corresponding layer mapping.
Optionally, re map unit 14 is additionally operable to:
Bit data after j-th layer of corresponding layer mapping is carried out re mapping, generate j-th layer be mapped in virtual money
Bit data in source block；
After obtaining j-th layer of the bit data being mapped on virtual resource blocks, to+1 layer of corresponding bit data of jth
Repeat scrambling, layer mapping and re mapping, be mapped on virtual resource blocks up to what all layers obtaining i-th re reflected
Bit data, obtains the 3rd data, and the 3rd data is that i-th re is mapped in the bit data on virtual resource blocks.
Optionally, modulation and precoding unit 15 are additionally operable to;
The bit data that i-th re is mapped on virtual resource blocks is modulated being converted to complex-valued data；
By complex-valued data after precoding, re-map corresponding antenna port, obtain being mapped at least one antenna
The antenna data of i-th re on port；
Obtaining the antenna data of i-th re, bit data i+1 re being mapped on virtual resource blocks repeats to hold
Row modulation, precoding, the antenna data of the i+1 re obtaining being mapped at least one antenna port, up to obtaining first
The antenna data of all re of symbol.
Optionally,
First symbol is OFDM ofdm symbol；
The code word number of every layer of mapping of each re is that the mapping relations according to code word to floor to re obtain, and code word arrives to layer
The mapping relations of re pre-set.
Optionally,
First caching 11 is Transmission Time Interval tti level caching；Second caching 16 is symbol level caching；
First caching 11 and the second caching 16 are ping-pong structure caching.
The invention provides a kind of channel mapping device, the bit number of caching in this channel mapping device reading first caching
According to, and bit data is carried out with scrambling generation the first data；Layer mapping is carried out to the first data, obtains being mapped at least one layer
On the second data；The mapping of resource particle re is carried out to the second data, obtains be mapped on the corresponding virtual resource blocks of layer
Three data；It is modulated obtaining complex-valued data to the 3rd data, and precoding is carried out to complex-valued data, obtain being mapped at least one
Antenna data on individual antenna port；By using the second caching caching antenna data；Read the antenna data in the second caching,
And orthogonal frequency-division multiplex singal is generated based on antenna data.Thus providing a kind of mechanism of channel mapping, ensure that in letter
Saving process resource in road mapping process and storage resource, reduce cost of implementation.
The present invention provides a kind of channel mapping device 2, as shown in fig. 7, this channel mapping device 2 includes: bus 21, and
It is connected to processor 22, memorizer 23 and the interface 24 of bus, wherein interface 24 is used for and other net element communications；Memorizer 23 is used
In store instruction 231；Processor 22 execute instruction 231 is used for:
Read the bit data of caching in the first caching, and bit data is carried out with scrambling and generate the first data；
Layer mapping is carried out to the first data, obtains the second data being mapped at least one layer；
The mapping of resource particle re is carried out to the second data, obtains the 3rd number being mapped on the corresponding virtual resource blocks of layer
According to；
It is modulated obtaining complex-valued data to the 3rd data, and precoding is carried out to complex-valued data, obtain being mapped at least
Antenna data on one antenna port；
By using the second caching caching antenna data；
Read the antenna data in the second caching, and orthogonal frequency-division multiplex singal is generated based on antenna data.
Optionally, processor 22 execute instruction 231 can be also used for:
Read the bit data of the first symbol of caching in the first caching, according to every layer of each resource particle re default
The code word of mapping, is the j-th layer of corresponding bit data assigned code font size of i-th re in the first symbol；
According to needed for j-th Layer assignment code word number and the corresponding bit data length of j-th floor obtain j-th floor mapping
Bit data；
The j-th layer of required bit data of mapping is scrambled, is obtained the first data, the first data is right for j-th layer
Bit data after the scrambling answered；The initial value of wherein i, j is 1, and i, j are positive integer.
Optionally, processor 22 execute instruction 231 can be also used for:
The j-th layer of bit data mapping after corresponding scrambling is carried out layer mapping, obtains the second data, the second data is
Bit data after j-th layer of corresponding layer mapping.
Optionally, processor 22 execute instruction 231 can be also used for:
Bit data after j-th layer of corresponding layer mapping is carried out re mapping, generate j-th layer be mapped in virtual money
Bit data in source block；
After obtaining j-th layer of the bit data being mapped on virtual resource blocks, to+1 layer of corresponding bit data of jth
Repeat scrambling, layer mapping and re mapping, be mapped on virtual resource blocks up to what all layers obtaining i-th re reflected
Bit data, obtains the 3rd data, and the 3rd data is that i-th re is mapped in the bit data on virtual resource blocks.
Optionally, processor 22 execute instruction 231 can be also used for:
The bit data that i-th re is mapped on virtual resource blocks is modulated being converted to complex-valued data；
By complex-valued data after precoding, re-map corresponding antenna port, obtain being mapped at least one antenna
The antenna data of i-th re on port；
Obtaining the antenna data of i-th re, bit data i+1 re being mapped on virtual resource blocks repeats to hold
Row modulation, precoding, the antenna data of the i+1 re obtaining being mapped at least one antenna port, up to obtaining first
The antenna data of all re of symbol.
Optionally, the first symbol is OFDM ofdm symbol；
The code word number of every layer of mapping of each re is that the mapping relations according to code word to floor to re obtain, and code word arrives to layer
The mapping relations of re pre-set.
The invention provides a kind of channel mapping device, the bit number of caching in this channel mapping device reading first caching
According to, and bit data is carried out with scrambling generation the first data；Layer mapping is carried out to the first data, obtains being mapped at least one layer
On the second data；The mapping of resource particle re is carried out to the second data, obtains be mapped on the corresponding virtual resource blocks of layer
Three data；It is modulated obtaining complex-valued data to the 3rd data, and precoding is carried out to complex-valued data, obtain being mapped at least one
Antenna data on individual antenna port；By using the second caching caching antenna data；Read the antenna data in the second caching,
And orthogonal frequency-division multiplex singal is generated based on antenna data.Thus providing a kind of mechanism of channel mapping, ensure that in letter
Saving process resource in road mapping process and storage resource, reduce cost of implementation.
It should be understood that disclosed method and apparatus in several embodiments provided herein, can be passed through it
Its mode is realized.For example, device embodiment described above is only schematically, for example, the division of unit, it is only
A kind of division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not execute.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or communication link
Connect, can be electrical, mechanical or other forms.
The unit illustrating as separating component can be or may not be physically separate, show as unit
Part can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple networks
On unit.The purpose to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that the independent physics of unit is included it is also possible to two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be to be realized in the form of hardware, it would however also be possible to employ the form that hardware adds SFU software functional unit is realized.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, server, or network equipment etc.) executes the part step of each embodiment method of the present invention
Suddenly.And aforesaid storage medium includes: u disk, portable hard drive, read only memory (read-only memory, abbreviation rom), with
Machine access memorizer (random access memory, abbreviation ram), magnetic disc or CD etc. are various can be with store program codes
Medium.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be with described scope of the claims.
Claims (11)
1. a kind of channel mapping device is it is characterised in that described device includes:
First caching, for caching bit data；
Scrambling unit, for reading the bit data of caching in the first caching, and carries out to described bit data scrambling generation the
One data；
Layer map unit, for carrying out layer mapping to described first data, obtains the second data being mapped at least one layer；
Resource particle maps re unit, for carrying out re mapping to described second data, obtains being mapped in the corresponding void of described layer
Intend the 3rd data on Resource Block；
Modulation and precoding unit, for being modulated obtaining complex-valued data to described 3rd data, and to described complex-valued data
Carry out precoding, obtain the antenna data being mapped at least one antenna port；
Second caching, for caching described antenna data；
Signal generation unit, for reading the described antenna data in described second caching, and is generated based on described antenna data
Orthogonal frequency-division multiplex singal.
2. device according to claim 1 it is characterised in that described scrambling unit specifically for:
Read the bit data of the first symbol of caching in described first caching, according to every layer of each resource particle re default
The code word of mapping, is the j-th layer of corresponding bit data assigned code font size of i-th re in described first symbol；
Described j-th floor is obtained according to described j-th Layer assignment code word number and the corresponding bit data length of described j-th floor
The required bit data of mapping；
The described j-th layer required bit data of mapping is scrambled, is obtained described first data, described first data is institute
State the bit data after j-th layer of corresponding scrambling；The initial value of wherein i, j is 1, and i, j are positive integer.
3. device according to claim 2 it is characterised in that described re map unit specifically for:
Bit data after j-th layer of corresponding layer mapping is carried out re mapping, generate described j-th layer be mapped in virtual money
Bit data in source block；
After obtaining described j-th layer of the bit data being mapped on virtual resource blocks, to+1 layer of corresponding bit data of jth
Repeat described scrambling, the mapping of described layer and described re mapping, until obtaining being mapped in of all layers of described i-th re
Bit data on virtual resource blocks, obtains described 3rd data, and described 3rd data is mapped in virtual money for described i-th re
Bit data in source block.
4. the device according to Claims 2 or 3 it is characterised in that described modulation and precoding unit specifically for:
The bit data that i-th re is mapped on virtual resource blocks is modulated being converted to complex-valued data；
By described complex-valued data after precoding, re-map corresponding antenna port, obtain being mapped at least one antenna
The antenna data of described i-th re on port；
In the antenna data obtaining described i-th re, bit data i+1 re being mapped on virtual resource blocks repeats to hold
The described modulation of row, described precoding, the antenna data of the described i+1 re obtaining being mapped at least one antenna port,
Until obtaining the antenna data of all re of described first symbol.
5. the device according to Claims 2 or 3 is it is characterised in that include:
Described first symbol is OFDM ofdm symbol；
The code word number of every layer of mapping of described each re default is that the mapping relations according to code word to floor to re obtain, described
Code word pre-sets to layer to the mapping relations of re.
6. according to the arbitrary described device of claims 1 to 3 it is characterised in that
Described first caches as Transmission Time Interval tti level caching；Described second caches as symbol level caching；
Described first caching and described second caches as ping-pong structure caching.
7. a kind of channel mapping method is it is characterised in that methods described includes:
Read the bit data of caching in the first caching, and described bit data is carried out with scrambling and generate the first data；
Layer mapping is carried out to described first data, obtains the second data being mapped at least one layer；
The mapping of resource particle re is carried out to described second data, obtains be mapped on the corresponding virtual resource blocks of described layer the 3rd
Data；
It is modulated obtaining complex-valued data to described 3rd data, and precoding is carried out to described complex-valued data, be mapped in
Antenna data at least one antenna port；
Cache described antenna data by using the second caching；
Read the described antenna data in described second caching, and orthogonal frequency-division multiplex singal is generated based on described antenna data.
8. method according to claim 7 is it is characterised in that read the bit data of caching in the first caching, and to institute
State bit data carry out scrambling generate the first data include:
Read the bit data of the first symbol of caching in described first caching, the code of every layer of mapping according to each re default
Word, is the j-th layer of corresponding bit data assigned code font size of i-th re in described first symbol；
Described j-th floor is obtained according to described j-th Layer assignment code word number and the corresponding bit data length of described j-th floor
The required bit data of mapping；
The described j-th layer required bit data of mapping is scrambled, is obtained described first data, described first data is institute
State the bit data after j-th layer of corresponding scrambling；The initial value of wherein i, j is 1, and i, j are positive integer.
9. method according to claim 8 is it is characterised in that described carry out resource particle re to described second data and reflect
Penetrate, the 3rd data obtaining being mapped on the corresponding virtual resource blocks of described layer includes:
Bit data after described j-th layer corresponding layer mapping is carried out re mapping, generate described j-th layer be mapped in void
Intend the bit data on Resource Block；
After obtaining described j-th layer of the bit data being mapped on virtual resource blocks, to+1 layer of corresponding bit data of jth
Repeat described scrambling, the mapping of described layer and described re mapping, until obtaining being mapped in of all layers of described i-th re
Bit data on virtual resource blocks, obtains described 3rd data, and described 3rd data is mapped in virtual money for described i-th re
Bit data in source block.
10. method according to claim 8 or claim 9 is it is characterised in that described be modulated being answered to described 3rd data
Value Data, and precoding is carried out to described complex-valued data, the antenna data obtaining being mapped at least one antenna port includes:
The bit data that described i-th re is mapped on virtual resource blocks is modulated being converted to complex-valued data；
By described complex-valued data after precoding, re-map corresponding antenna port, obtain being mapped at least one antenna
The antenna data of described i-th re on port；
In the antenna data obtaining described i-th re, bit data i+1 re being mapped on virtual resource blocks repeats to hold
The described modulation of row, described precoding, the antenna data of the described i+1 re obtaining being mapped at least one antenna port,
Until obtaining the antenna data of all re of described first symbol.
11. methods according to claim 10 are it is characterised in that include:
Described first symbol is OFDM ofdm symbol；
The code word number of every layer of mapping of described each re default is that the mapping relations according to code word to floor to re obtain, described
Code word pre-sets to layer to the mapping relations of re.
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| CN102299735A (en) * | 2010-06-25 | 2011-12-28 | 普天信息技术研究院有限公司 | Method for decreasing bandwidth of Ir interface and distributed base station |
| CN102984107A (en) * | 2011-09-07 | 2013-03-20 | 普天信息技术研究院有限公司 | Optical fiber time delay compensation method and device suitable for long term evolution (LTE) system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102299735A (en) * | 2010-06-25 | 2011-12-28 | 普天信息技术研究院有限公司 | Method for decreasing bandwidth of Ir interface and distributed base station |
| CN102984107A (en) * | 2011-09-07 | 2013-03-20 | 普天信息技术研究院有限公司 | Optical fiber time delay compensation method and device suitable for long term evolution (LTE) system |
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