CN101834820A - Resource mapping method of demodulation pilot frequency - Google Patents

Resource mapping method of demodulation pilot frequency Download PDF

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Publication number
CN101834820A
CN101834820A CN200910079389A CN200910079389A CN101834820A CN 101834820 A CN101834820 A CN 101834820A CN 200910079389 A CN200910079389 A CN 200910079389A CN 200910079389 A CN200910079389 A CN 200910079389A CN 101834820 A CN101834820 A CN 101834820A
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subcarrier
ofdm symbol
time slot
pilot frequency
number time
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段亚军
孙云锋
毕峰
张晨晨
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a resource mapping method of demodulation pilot frequency. The method comprises: according to the distribution of the orthogonal frequency division multiplexing (OFDM) sign of private port pilot frequency on a time domain, determining the mapping density of each layer of the demodulation pilot frequency on the time domain, and determining the mapping density of each layer of the demodulation pilot frequency on a frequency domain; and according to the mapping densities of the demodulation pilot frequency on the time domain and the frequency domain, evenly mapping each layer of the demodulation pilot frequency on a resource block. The invention continues to use an OFDM sign occupied by antenna port 5 pilot frequency in a long term evolution (LTE) system so as to avoid conflicting with public pilot frequency; on the premise that cost is tolerable, the invention improves the demodulation performance of a user and has less influence on channel interpolation.

Description

The method for mapping resource of demodulation pilot frequency
Technical field
The present invention relates to the demodulation pilot frequency technology in the radio communication, relate in particular to a kind of method for mapping resource of demodulation pilot frequency.
Background technology
The high-order multi-antenna technology is one of key technology of senior Long Term Evolution (LTE-Advanced, Long-Term EvolutionAdvance) system, in order to improve system transmissions speed.In order to realize introducing channel quality measurement and the data demodulates behind the high-order multi-antenna technology, the LTE-Advanced system has defined data demodulates pilot tone and channel quality measurement pilot tone respectively.Wherein, demodulation pilot frequency need be followed following principle:
A, demodulation pilot frequency are that terminal is proprietary, and only go up transmission at scheduled resources piece (RB, Resource Block) and corresponding layer;
B, demodulation pilot frequency are the expansion of pilot tone on a plurality of transport layers of antenna port 5 in long evolving system the 8th version (LTE R8);
Demodulation pilot frequency on c, the different transport layer is orthogonal;
Demodulation pilot frequency on d, each transport layer and the same pre-coding matrix of The data.
In the prior art based on the dedicated pilot of antenna port 5, for normal cyclic prefix (NormalCP, Normal Cyclic Prefix) data, the pilot tone of antenna port 5 as shown in Figure 1, even number time slot and odd number time slot are respectively 7 (from l=0 to l=6), corresponding 7 OFDMs (OFDM, OrthogonalFrequency Division Multiplexing) symbol, subcarrier has 12 (from k=0 to k=11).The pilot tone R of antenna port 5 5Be positioned at the 4th (l=3) and the individual OFDM symbol of 7 (l=6) of even number time slot, and the 3rd (l=2) of odd number pilot tone and the individual OFDM symbol of 6 (l=5).At the even number time slot, the pilot tone R of antenna port 5 5Be positioned at the 1st, 5 and 9 subcarrier of the 4th OFDM symbol, and the 3rd, 7 and 11 subcarrier of the 7th OFDM symbol; At the odd number time slot, the pilot tone R of antenna port 5 5Be positioned at the 1st, 5 and 9 subcarrier of the 3rd OFDM symbol, and the 3rd, 7 and 11 subcarrier of the 6th OFDM symbol.
For extended cyclic prefix (Extended CP, Extended Cyclic Prefix) data, the pilot tone of antenna port 5 as shown in Figure 2, even number time slot and odd number time slot are respectively 6 (from l=0 to l=5), corresponding 6 OFDM symbols, subcarrier has 12 (from k=0 to k=11).The pilot tone R of antenna port 5 5Be positioned at the individual OFDM symbol of the 5th (l=4) of even number time slot, and the 2nd (l=1) of odd number pilot tone and the individual OFDM symbol of 5 (l=4).At the even number time slot, the pilot tone R of antenna port 5 5Be positioned at the 1st, 4,7 and 10 subcarrier of the 5th OFDM symbol; At the odd number time slot, the pilot tone R of antenna port 5 5Be positioned at the 3rd, 6,9 and 12 subcarrier of the 2nd OFDM symbol, and the 1st, 4,7 and 10 subcarrier of the 5th OFDM symbol.
Yet, no matter be demodulation pilot frequency for the normal cyclic prefix data, or the demodulation pilot frequency of extended cyclic prefix data, prior art all also can't solve the problem of its resource mapping, thereby makes troubles to practical application; In addition, existing pilot frequency system among the LTE makes overhead excessive.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method for mapping resource of demodulation pilot frequency, to realize being used for the pilot tone of data demodulates and the mapping of Physical Resource Block.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of method for mapping resource of demodulation pilot frequency, this method comprises:
According to the orthogonal frequency division multiplex OFDM symbol distribution of private port pilot tone on time domain, determine the mapping density of each layer demodulation pilot frequency on time domain, and determine the mapping density of each layer demodulation pilot frequency on frequency domain;
According to the mapping density of described demodulation pilot frequency on time domain and frequency domain, each layer demodulation pilot frequency evenly is mapped on the Resource Block.
For the data of normal cyclic prefix, described being mapped as:
In time domain, with the demodulation pilot frequency R of ground floor 0Demodulation pilot frequency R with the second layer 1Be mapped in the 4th OFDM symbol of even number time slot and the 3rd OFDM symbol of odd number time slot; Demodulation pilot frequency R with the 3rd layer 2Demodulation pilot frequency R with the 4th layer 3Be mapped in the 3rd OFDM symbol of even number time slot and the 6th OFDM symbol of odd number time slot;
At frequency domain, R 0With R 1Between, and R 2With R 3Between, at least one subcarrier evenly distributes at interval.
When frequency domain interval is a subcarrier, described being mapped as:
At even number time slot, R 0Be positioned at first, the 5th and the 9th subcarrier of the 4th OFDM symbol, R 1Be positioned at the 3rd, the 7th and the 11 subcarrier of the 4th OFDM symbol, R 2Be positioned at first, the 5th and the 9th subcarrier of the 7th OFDM symbol, R 3Be positioned at the 3rd, the 7th and the 11 subcarrier of the 7th OFDM symbol;
At odd number time slot, R 0Be positioned at the 3rd, the 7th and the 11 subcarrier of the 3rd OFDM symbol, R 1Be positioned at first, the 5th and the 9th subcarrier of the 3rd OFDM symbol, R 2Be positioned at the 3rd, the 7th and the 11 subcarrier of the 6th OFDM symbol, R 3Be positioned at first, the 5th and the 9th subcarrier of the 6th OFDM symbol.
When frequency domain interval is two subcarriers, described being mapped as:
At even number time slot, R 0Be positioned at first and the 7th subcarrier of the 4th OFDM symbol, R 1Be positioned at the 4th and the tenth subcarrier of the 4th OFDM symbol, R 2Be positioned at first and the 7th subcarrier of the 7th OFDM symbol, R 3Be positioned at the 4th and the tenth subcarrier of the 7th OFDM symbol;
At odd number time slot, R 0Be positioned at the 4th and the tenth subcarrier of the 3rd OFDM symbol, R 1Be positioned at first and the 7th subcarrier of the 3rd OFDM symbol, R 2Be positioned at the 4th and the tenth subcarrier of the 6th OFDM symbol, R 3Be positioned at first and the 7th subcarrier of the 6th OFDM symbol.
When frequency domain interval is three subcarriers, described being mapped as:
At even number time slot, R 0Be positioned at first and the 9th subcarrier of the 4th OFDM symbol, R 1Be positioned at the 5th subcarrier of the 4th OFDM symbol, R 2Be positioned at first and the 9th subcarrier of the 7th OFDM symbol, R 3Be positioned at the 5th subcarrier of the 7th OFDM symbol;
At odd number time slot, R 0Be positioned at the 5th subcarrier of the 3rd OFDM symbol, R 1Be positioned at first and the 9th subcarrier of the 3rd OFDM symbol, R 2Be positioned at the 5th subcarrier of the 6th OFDM symbol, R 3Be positioned at first and the 9th subcarrier of the 6th OFDM symbol.
For the data of extended cyclic prefix, described being mapped as: the demodulation pilot frequency on each layer evenly is mapped in the 5th OFDM symbol of even number time slot and the 5th OFDM symbol of odd number time slot, specifically comprises:
On the 5th OFDM symbol of even number time slot, R 0Be positioned at first and the 7th subcarrier, R 1Be positioned at the 4th and the tenth subcarrier, R 2Be positioned at second and the 8th subcarrier, R 3Be positioned at the 5th and the 11 subcarrier;
On the 5th OFDM symbol of odd number time slot, R 0Be positioned at the 4th and the tenth subcarrier, R 1Be positioned at first and the 7th subcarrier, R 2Be positioned at the 5th and the 11 subcarrier, R 3Be positioned at second and the 8th subcarrier.
For the data of extended cyclic prefix, described being mapped as: with R 0And R 1Be mapped in the 5th OFDM symbol of even number time slot and odd number time slot, R 2And R 3Be mapped in second OFDM symbol of odd number time slot, and R 0With R 1Between, and R 2With R 3Between, two subcarriers evenly distribute at interval, specifically comprise:
On the 5th OFDM symbol of even number time slot, R 0Be positioned at first and the 7th subcarrier, R 1Be positioned at four and the tenth subcarriers;
On second OFDM symbol of odd number time slot, R 2Be positioned at first and the 7th subcarrier, R 3Be positioned at the 4th and the tenth subcarrier; On the 5th OFDM symbol of odd number time slot, R 1Be positioned at first and the 7th subcarrier, R 0Be positioned at the 4th and the tenth subcarrier.
For the data of extended cyclic prefix, described being mapped as: with R 0And R 1Be mapped in the 5th OFDM symbol of even number time slot and odd number time slot, R 2And R 3Be mapped in the 6th OFDM symbol of even number time slot and odd number time slot, and R 0With R 1Between, and R 2With R 3Between, two subcarriers evenly distribute at interval, specifically comprise:
On the 5th OFDM symbol of even number time slot, R 0Be positioned at first and the 7th subcarrier, R 1Be positioned at the 4th and the tenth subcarrier; On the 5th OFDM symbol of odd number time slot, R 0Be positioned at the 4th and the tenth subcarrier, R 1Be positioned at first and the 7th subcarrier;
On the 6th OFDM symbol of even number time slot, R 2Be positioned at first and the 7th subcarrier, R 3Be positioned at the 4th and the tenth subcarrier; On the 6th OFDM symbol of odd number time slot, R 3Be positioned at first and the 7th subcarrier, R 2Be positioned at the 4th and the tenth subcarrier.
The method for mapping resource of demodulation pilot frequency provided by the present invention according to the OFDM symbol distribution of private port pilot tone on time domain, is determined the mapping density of each layer demodulation pilot frequency on time domain, and determines the mapping density of each layer demodulation pilot frequency on frequency domain; According to the mapping density of demodulation pilot frequency on time domain and frequency domain, each layer demodulation pilot frequency evenly is mapped on the Resource Block.The present invention continues to use the shared OFDM symbol of antenna port 5 pilot tones among the LTE, has avoided and the conflicting of public guide frequency; Under the tolerable prerequisite of expense, improve user's demodulation performance; Less to the influence of channel interpolation.
Description of drawings
Fig. 1 is the pilot tone schematic diagram of normal cyclic prefix data in the prior art;
Fig. 2 is the pilot tone schematic diagram of extended cyclic prefix data in the prior art;
Fig. 3 is the flow chart of the method for mapping resource of a kind of demodulation pilot frequency of the present invention;
Fig. 4 is the resource mapping schematic diagram of the demodulation pilot frequency of the embodiment of the invention one;
Fig. 5 is the resource mapping schematic diagram of the demodulation pilot frequency of the embodiment of the invention two;
Fig. 6 is the resource mapping schematic diagram of the demodulation pilot frequency of the embodiment of the invention three;
Fig. 7 is the resource mapping schematic diagram of the demodulation pilot frequency of the embodiment of the invention four;
Fig. 8 is the resource mapping schematic diagram of the demodulation pilot frequency of the embodiment of the invention five;
Fig. 9 is the resource mapping schematic diagram of the demodulation pilot frequency of the embodiment of the invention six.
Embodiment
The technical solution of the present invention is further elaborated below in conjunction with the drawings and specific embodiments.
A kind of pilot tone of data demodulates and mapping method of Physical Resource Block of being used for provided by the present invention as shown in Figure 3, mainly may further comprise the steps:
Step 301 according to the OFDM symbol distribution of private port pilot tone on time domain, is determined the mapping density of each layer demodulation pilot frequency on time domain, and determines the mapping density of each layer demodulation pilot frequency on frequency domain.
In the LTE system, antenna port 1, antenna port 2, antenna port 3 and antenna port 4 are public guide frequency, and antenna port 5 is a private port.The shared OFDM symbol of antenna port 5 pilot tones among the LTE is continued to use in pilot tone of the present invention mapping, to avoid conflicting of demodulation pilot frequency and public guide frequency.
Step 302 according to the mapping density of demodulation pilot frequency on time domain and frequency domain, evenly is mapped in each layer demodulation pilot frequency on the Resource Block.
For the data of normal cyclic prefix, the pilot tone mapping is specially:
In time domain, with the demodulation pilot frequency R of ground floor (layer 0) 0And the demodulation pilot frequency R of the second layer (layer 1) 1Be mapped in the 4th OFDM symbol of even number time slot and the 3rd OFDM symbol of odd number time slot; Demodulation pilot frequency R with the 3rd layer (layer 2) 2Demodulation pilot frequency R with the 4th layer (layer 3) 3Be mapped in the 3rd OFDM symbol of even number time slot and the 6th OFDM symbol of odd number time slot;
At frequency domain, R 0With R 1Between, and R 2With R 3Between, at least one subcarrier evenly distributes at interval.
Preferable, for the data of normal cyclic prefix, when frequency domain interval is a subcarrier, its pilot tone mapping as shown in Figure 4, the demodulation pilot frequency of layer 0 and layer 1 is positioned at the 4th OFDM symbol of even number time slot and the 3rd OFDM symbol of odd number time slot.At the even number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 1st, 5 and 9 subcarrier of the 4th OFDM symbol, the demodulation pilot frequency R of layer 1 1Be positioned at the 3rd, 7 and 11 subcarrier of the 4th OFDM symbol; At the odd number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 3rd, 7 and 11 subcarrier of the 3rd OFDM symbol, the demodulation pilot frequency R of layer 1 1Be positioned at the 1st, 5 and 9 subcarrier of the 3rd OFDM symbol.
Layer 2 and layer 3 pilot tone are positioned at the 7th OFDM symbol of even number time slot and the 6th OFDM symbol of odd number time slot.At the even number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 1st, 5 and 9 subcarrier of the 7th OFDM symbol, the demodulation pilot frequency R of layer 3 3Be positioned at the 3rd, 7 and 11 subcarrier of the 7th OFDM symbol; At the odd number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 3rd, 7 and 11 subcarrier of the 6th OFDM symbol, the demodulation pilot frequency R of layer 3 3Be positioned at the 1st, 5 and 9 subcarrier of the 6th OFDM symbol.
Preferable, for the data of normal cyclic prefix, when frequency domain interval is two subcarriers, its pilot tone mapping as shown in Figure 5, the demodulation pilot frequency of layer 0 and layer 1 is positioned at the 4th OFDM symbol of even number time slot and the 3rd OFDM symbol of odd number time slot.At the even number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 1st and 7 subcarrier of the 4th OFDM symbol, the demodulation pilot frequency R of layer 1 1Be positioned at the 4th and 10 subcarrier of the 4th OFDM symbol; At the odd number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 4th and 10 subcarrier of the 3rd OFDM symbol, the demodulation pilot frequency R of layer 1 1Be positioned at the 1st and 7 subcarrier of the 3rd OFDM symbol.
Layer 2 and layer 3 pilot tone are positioned at the 7th OFDM symbol of even number time slot and the 6th OFDM symbol of odd number time slot.At the even number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 1st and 7 subcarrier of the 7th OFDM symbol, the demodulation pilot frequency R of layer 3 3Be positioned at the 4th and 10 subcarrier of the 7th OFDM symbol; At the odd number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 4th and 10 subcarrier of the 6th OFDM symbol, the demodulation pilot frequency R of layer 3 3Be positioned at the 1st and 7 subcarrier of the 6th OFDM symbol.
Preferable, for the data of normal cyclic prefix, when frequency domain interval is three subcarriers, its pilot tone mapping as shown in Figure 6, the demodulation pilot frequency of layer 0 and layer 1 is positioned at the 4th OFDM symbol of even number time slot and the 3rd OFDM symbol of odd number time slot.At the even number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 1st and 9 subcarrier of the 4th OFDM symbol, the demodulation pilot frequency R of layer 1 1Be positioned at the 5th subcarrier of the 4th OFDM symbol; At the odd number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 5th subcarrier of the 3rd OFDM symbol, the demodulation pilot frequency R of layer 1 1Be positioned at the 1st and 9 subcarrier of the 3rd OFDM symbol.
Layer 2 and layer 3 pilot tone are positioned at the 7th OFDM symbol of even number time slot and the 6th OFDM symbol of odd number time slot.At the even number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 1st and 9 subcarrier of the 7th OFDM symbol, the demodulation pilot frequency R of layer 3 3Be positioned at the 5th subcarrier of the 7th OFDM symbol; At the odd number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 5th subcarrier of the 6th OFDM symbol, the demodulation pilot frequency R of layer 3 3Be positioned at the 1st and 9 subcarrier of the 6th OFDM symbol.
Preferable, for the demodulation pilot frequency of extended cyclic prefix, the demodulation pilot frequency on four layers evenly can be mapped in the 5th OFDM symbol of even number time slot and the 5th OFDM symbol of odd number time slot.As shown in Figure 7, on the 5th OFDM symbol of even number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 1 1Be positioned at the 4th and 10 subcarrier, the demodulation pilot frequency R of layer 2 2Be positioned at the 2nd and 8 subcarrier, the demodulation pilot frequency R of layer 3 3Be positioned at the 5th and 11 subcarrier.On the 5th OFDM symbol of odd number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 4th and 10 subcarrier, the demodulation pilot frequency R of layer 1 1Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 2 2Be positioned at the 5th and 11 subcarrier, the demodulation pilot frequency R of layer 3 3Be positioned at the 2nd and 8 subcarrier.
Preferable, for the demodulation pilot frequency of extended cyclic prefix, also R just 0And R 1Be mapped in the 5th OFDM symbol of even number time slot and odd number time slot, R 2And R 3Be mapped in the 2nd OFDM symbol of odd number time slot; And R 0With R 1Between, and R 2With R 3Between, two subcarriers evenly distribute at interval.As shown in Figure 8, on the 5th OFDM symbol of even number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 1 1Be positioned at 4 and 10 subcarriers.On the 2nd OFDM symbol of odd number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 3 3Be positioned at the 4th and 10 subcarrier; On the 5th OFDM symbol of odd number time slot, the demodulation pilot frequency R of layer 1 1Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 0 0Be positioned at the 4th and 10 subcarrier.
Preferable, for the demodulation pilot frequency of extended cyclic prefix, can also be with R 0And R 1Be mapped in the 5th OFDM symbol of even number time slot and odd number time slot, R 2And R 3Be mapped in the 6th OFDM symbol of even number time slot and odd number time slot; And R 0With R 1Between, and R 2With R 3Between, two subcarriers evenly distribute at interval.As shown in Figure 9, on the 5th OFDM symbol of even number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 1 1Be positioned at the 4th and 10 subcarrier; On the 5th OFDM symbol of odd number time slot, the demodulation pilot frequency R of layer 0 0Be positioned at the 4th and 10 subcarrier, the demodulation pilot frequency R of layer 1 1Be positioned at the 1st and 7 subcarrier.On the 6th OFDM symbol of even number time slot, the demodulation pilot frequency R of layer 2 2Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 3 3Be positioned at the 4th and 10 subcarrier; On the 6th OFDM symbol of odd number time slot, the demodulation pilot frequency R of layer 3 3Be positioned at the 1st and 7 subcarrier, the demodulation pilot frequency R of layer 2 2Be positioned at the 4th and 10 subcarrier.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (8)

1. the method for mapping resource of a demodulation pilot frequency is characterized in that, this method comprises:
According to the orthogonal frequency division multiplex OFDM symbol distribution of private port pilot tone on time domain, determine the mapping density of each layer demodulation pilot frequency on time domain, and determine the mapping density of each layer demodulation pilot frequency on frequency domain;
According to the mapping density of described demodulation pilot frequency on time domain and frequency domain, each layer demodulation pilot frequency evenly is mapped on the Resource Block.
2. according to the method for mapping resource of the described demodulation pilot frequency of claim 1, it is characterized in that, for the data of normal cyclic prefix, described being mapped as:
In time domain, with the demodulation pilot frequency R of ground floor 0Demodulation pilot frequency R with the second layer 1Be mapped in the 4th OFDM symbol of even number time slot and the 3rd OFDM symbol of odd number time slot; Demodulation pilot frequency R with the 3rd layer 2Demodulation pilot frequency R with the 4th layer 3Be mapped in the 3rd OFDM symbol of even number time slot and the 6th OFDM symbol of odd number time slot;
At frequency domain, R 0With R 1Between, and R 2With R 3Between, at least one subcarrier evenly distributes at interval.
3. according to the method for mapping resource of the described demodulation pilot frequency of claim 2, it is characterized in that, when frequency domain interval is a subcarrier, described being mapped as:
At even number time slot, R 0Be positioned at first, the 5th and the 9th subcarrier of the 4th OFDM symbol, R 1Be positioned at the 3rd, the 7th and the 11 subcarrier of the 4th OFDM symbol, R 2Be positioned at first, the 5th and the 9th subcarrier of the 7th OFDM symbol, R 3Be positioned at the 3rd, the 7th and the 11 subcarrier of the 7th OFDM symbol;
At odd number time slot, R 0Be positioned at the 3rd, the 7th and the 11 subcarrier of the 3rd OFDM symbol, R 1Be positioned at first, the 5th and the 9th subcarrier of the 3rd OFDM symbol, R 2Be positioned at the 3rd, the 7th and the 11 subcarrier of the 6th OFDM symbol, R 3Be positioned at first, the 5th and the 9th subcarrier of the 6th OFDM symbol.
4. according to the method for mapping resource of the described demodulation pilot frequency of claim 2, it is characterized in that, when frequency domain interval is two subcarriers, described being mapped as:
At even number time slot, R 0Be positioned at first and the 7th subcarrier of the 4th OFDM symbol, R 1Be positioned at the 4th and the tenth subcarrier of the 4th OFDM symbol, R 2Be positioned at first and the 7th subcarrier of the 7th OFDM symbol, R 3Be positioned at the 4th and the tenth subcarrier of the 7th OFDM symbol;
At odd number time slot, R 0Be positioned at the 4th and the tenth subcarrier of the 3rd OFDM symbol, R 1Be positioned at first and the 7th subcarrier of the 3rd OFDM symbol, R 2Be positioned at the 4th and the tenth subcarrier of the 6th OFDM symbol, R 3Be positioned at first and the 7th subcarrier of the 6th OFDM symbol.
5. according to the method for mapping resource of the described demodulation pilot frequency of claim 2, it is characterized in that, when frequency domain interval is three subcarriers, described being mapped as:
At even number time slot, R 0Be positioned at first and the 9th subcarrier of the 4th OFDM symbol, R 1Be positioned at the 5th subcarrier of the 4th OFDM symbol, R 2Be positioned at first and the 9th subcarrier of the 7th OFDM symbol, R 3Be positioned at the 5th subcarrier of the 7th OFDM symbol;
At odd number time slot, R 0Be positioned at the 5th subcarrier of the 3rd OFDM symbol, R 1Be positioned at first and the 9th subcarrier of the 3rd OFDM symbol, R 2Be positioned at the 5th subcarrier of the 6th OFDM symbol, R 3Be positioned at first and the 9th subcarrier of the 6th OFDM symbol.
6. according to the method for mapping resource of the described demodulation pilot frequency of claim 1, it is characterized in that, for the data of extended cyclic prefix, described being mapped as: the demodulation pilot frequency on each layer evenly is mapped in the 5th OFDM symbol of even number time slot and the 5th OFDM symbol of odd number time slot, specifically comprises:
On the 5th OFDM symbol of even number time slot, R 0Be positioned at first and the 7th subcarrier, R 1Be positioned at the 4th and the tenth subcarrier, R 2Be positioned at second and the 8th subcarrier, R 3Be positioned at the 5th and the 11 subcarrier;
On the 5th OFDM symbol of odd number time slot, R 0Be positioned at the 4th and the tenth subcarrier, R 1Be positioned at first and the 7th subcarrier, R 2Be positioned at the 5th and the 11 subcarrier, R 3Be positioned at second and the 8th subcarrier.
7. according to the method for mapping resource of the described demodulation pilot frequency of claim 1, it is characterized in that, for the data of extended cyclic prefix, described being mapped as: with R 0And R 1Be mapped in the 5th OFDM symbol of even number time slot and odd number time slot, R 2And R 3Be mapped in second OFDM symbol of odd number time slot, and R 0With R 1Between, and R 2With R 3Between, two subcarriers evenly distribute at interval, specifically comprise:
On the 5th OFDM symbol of even number time slot, R 0Be positioned at first and the 7th subcarrier, R 1Be positioned at four and the tenth subcarriers;
On second OFDM symbol of odd number time slot, R 2Be positioned at first and the 7th subcarrier, R 3Be positioned at the 4th and the tenth subcarrier; On the 5th OFDM symbol of odd number time slot, R 1Be positioned at first and the 7th subcarrier, R 0Be positioned at the 4th and the tenth subcarrier.
8. according to the method for mapping resource of the described demodulation pilot frequency of claim 1, it is characterized in that, for the data of extended cyclic prefix, described being mapped as: with R 0And R 1Be mapped in the 5th OFDM symbol of even number time slot and odd number time slot, R 2And R 3Be mapped in the 6th OFDM symbol of even number time slot and odd number time slot, and R 0With R 1Between, and R 2With R 3Between, two subcarriers evenly distribute at interval, specifically comprise:
On the 5th OFDM symbol of even number time slot, R 0Be positioned at first and the 7th subcarrier, R 1Be positioned at the 4th and the tenth subcarrier; On the 5th OFDM symbol of odd number time slot, R 0Be positioned at the 4th and the tenth subcarrier, R 1Be positioned at first and the 7th subcarrier;
On the 6th OFDM symbol of even number time slot, R 2Be positioned at first and the 7th subcarrier, R 3Be positioned at the 4th and the tenth subcarrier; On the 6th OFDM symbol of odd number time slot, R 3Be positioned at first and the 7th subcarrier, R 2Be positioned at the 4th and the tenth subcarrier.
CN200910079389A 2009-03-09 2009-03-09 Resource mapping method of demodulation pilot frequency Pending CN101834820A (en)

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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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* Cited by examiner, † Cited by third party
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CN107733594A (en) * 2016-08-10 2018-02-23 电信科学技术研究院 A kind of method for mapping resource of demodulated reference signal, base station and terminal
CN107733594B (en) * 2016-08-10 2020-09-22 电信科学技术研究院 Resource mapping method of demodulation reference signal, base station and terminal

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Application publication date: 20100915