CN105337718A - Method and device for channel estimation and detection in MIMO (multi-input multi-output) system - Google Patents
Method and device for channel estimation and detection in MIMO (multi-input multi-output) system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0016—Time-frequency-code
Abstract
The name of the invention is 'Method and device for channel estimation and detection in MIMO (multi-input multi-output) system'. The invention provides a method for executing channel estimation and detection in a multi-input multi-output (MIMO) system. The method comprises the following steps: generating a demodulation reference signal (DM-RS) pattern for an extended cyclic prefix (CP); and estimating and detecting channel performance on the basis of the generated DM-RS pattern. The DM-RS pattern supports 8 layers of transmission from a rank 1 pattern to a rank 8 pattern. The invention also provides a forwarder, a receiver and a system. According to the solution provided by the invention, the channel estimation precision is improved, and the channel estimation implementation and implementation complexity on a terminal are saved.
Description
Technical field
The present invention relates to the field of radio communication, and relate more specifically to the relevant detection by the demodulated reference signal (DM-RS) of the Cyclic Prefix (CP of expansion) for expansion in universal terrestrial radio electricity access (E-UTRA) system (it is also often called as the Long Term Evolution (LTE) of the WCDMA system of ubiquitous deployment) of evolution.
Background technology
The current next generation mobile communication system as UMTS system of Long Term Evolution (LTE) comes into question.LTE can reach the packet-based science and technology communicated of the high speed of high data rate in the uplink with in down link for realizing.3GPP work on LTE is also referred to as the universal grounding access network of E-UTRAN(evolution).In order to support high data rate, LTE allows the system bandwidth up to 20MHz.LTE also can operate and can at least Frequency Division Duplexing (FDD) (FDD) and the middle operation of time division duplex (TDD) in different frequency band.The modulation technique used in LTE or transfer scheme are known as OFDM(OFDM).LTE senior (LTE-advanced) will be since issue version the future that can be regarded as LTE standard and it is the evolution of LTE, and compatibility is backward important so that LTE high-grade energy is deployed in the spectrum occupied by LTE.Be known as eNB or eNodeB(wherein e represent evolution) LTE and LTE advanced wireless electricity base station in, can adopt multiple antenna with Wave beam forming science and technology to provide high data rate to subscriber equipment.Therefore, LTE and LTE is senior is the example of multiple-input and multiple-output (MIMO) radio system.Another example based on the system of MIMO is Worldwide Interoperability for Microwave access interoperability (WiMAX) system.
As defined in 3GPPLTE, RS is just being multiplexed in OFDM T/F grid together with data.In Rel-8, according to different functional one three class downlink reference signal, i.e. cell specific reference signal, UE specific reference signals and MBSFN reference signal.Herein, front two class reference signals are paid close attention to.
Cell specific reference signal (also cry and be called CRS) is responsible for the data demodulates in the Rel-8 of the downlink delivery mode except mode 7 (i.e. individual layer Wave beam forming) and channel measurement.Use CRS is calculated channel quality instruction/pre-coding matrix index/order designator (RankIndicator) (CQI/PMI/RI) and carries out data demodulates by performing channel estimating by UE terminal.Nearly 4 layers of transmission, that is, antenna port 0-3 are supported in definition altogether 4 CRS, as shown in Figure 1 (only normal CP), and detailed description at standard document, can be found in " 3GPPTS36.211V8.6.0 (2009-03) ".
Introducing UE specific reference signals (also referred to as DRS (Dedicated Reference Signal), or DRS), only for the transfer mode 7 in Rel-8, i.e. individual layer Wave beam forming.DRS is by precoding and the precoder identical with data sharing.In addition, DRS is only responsible for channel demodulation, this means that the channel estimating for data demodulates will be performed based on DRS.In Rel-8, only single DRS port is defined to support individual layer transmission, that is, antenna port 5.DRS pattern (pattern) for the CP of normal CP and expansion is defined respectively, as shown in Figure 2 (only normal CP).Detailed description at standard document, can be found in " 3GPPTS36.211V8.6.0 (2009-03) ".
In " 3GPP, RANl_58bisChairmannotes, RAN158bis, October12th-16th, 2009, Miyazaki, Japan ", DM-RS is normal CP and designing, and as shown in Figure 3, serves as nearly four layers of DM-RS pattern.Some characteristics are summarized in this: every layer altogether 12 resource elements reached an agreement on as DM-RS expense (being denoted as 1 or 2 in figure 3).Two CDM groups (being denoted as 1 and 2) occupy subcarriers different in frequency domain.Each CDM group use respective length be 26 orthogonal codes cover (orthogonalcodecover) (OCC) and come multiplexing nearly two-layer.This is the version of noninterlace, and namely 1DM-RS group (cluster) and 2DM-RS mine massively and get identical subcarrier.
In order to realize LTE advanced downlink spectrum efficiency 30bps/Hz, a certain class advanced Antenna should be used to configure (such as 8x8 high-order (high-order) MIMO) and to support nearly 8 layers of transmission.If nearly the similar designs of 8 cell specific reference signal is introduced into, overhead will inevitably increase, and therefore throughput performance will seriously be reduced.Therefore, there is the demand for the DM-RS pattern generating the CP for expansion supported from order 1 to order 8 pairs of normal sub-frames and down link pilot timeslot (DwPTS).Consider based on this, propose CSI-RS(i.e. cell specific reference signal) target is only channel measurement, and DM-RS(i.e. UE specific reference signals) target is only channel demodulation.All UE terminal accesses in CSI-RS Neng Bei community and DM-RS only can be accessed by UE on the Resource Block (RB) distributed.
In the DM-RS pattern of the CP for expansion, the CP of known extensions is not together with transfer mode 8(and layer beam rock mechanism) supported.The use of CP of expansion is expected the channel for having the dispersion of larger time, or comparably for compared to the channel wherein using the channel of normal CP (such as medium (Vehicular) B channel (VehB)) to experience much more frequency selectivity.Therefore, exist for the DM-RS pattern generated for the CP of expansion to ensure and to improve the demand of the detection perform in this type of channel.
In TDD, configure according to different special subframe, DwPTS has different length, and this causes the quite a lot of design in UE side.Therefore, exist for the DM-RS pattern of CP generated for expansion to reduce the demand that UE realizes complexity.
The pattern designed for normal CP is accepted well.Some design principles are determined.Therefore, exist for generating the smooth and easy and closed design that has for the CP of expansion to save UE further and realize and the demand of DM-RS for the CP expanded of standard effort.
Summary of the invention
The invention provides a kind of method for performing channel estimating in multiple-input and multiple-output mimo system and detection, comprising: the demodulated reference signal DM-RS pattern generating the cyclic prefix CP for expansion; And estimate based on generated DM-RS signal pattern and detect channel performance.Described DM-RS pattern comprises the order 5-8 pattern supported 8 layers of transmission.
The present invention also provides a kind of conveyer, comprising: for generating the demodulated reference signal pattern maker of the DM-RS pattern of the Cyclic Prefix for expansion.Described DM-RS pattern comprises the order 5-8 pattern supported 8 layers of transmission.
In additional aspects of the present invention, a kind of receiver being provided, comprising: channel estimation module, being suitable for by using demodulated reference signal (DM-RS) pattern of the Cyclic Prefix for expansion to estimate channel performance; And channel detection module, be suitable for by using the channel condition information CSI of the estimation comprised in DM-RS coherently to detect.Described DM-RS pattern comprises the order 5-8 pattern supported 8 layers of transmission.
In another aspect of this invention, provide a kind of system of conveyer and the receiver comprising as above face.
In a word, the present invention is that the CP of expansion proposes staggered pattern, and it is compared normal CP and has slightly high RS expense from order 1 to order 8.The good capacity of catching fast frequency change can be provided to improve accuracy of channel estimation by the channel estimating and detection in frequency of utilization territory with the pattern of the present invention of slightly high RS expense, this is appropriate to the CP situation expanded usually.In addition, pattern of the present invention can keep subset design to realize in the channel estimating of terminal to save as much as possible.And when in a tdd system, pattern of the present invention can be saved standard and made great efforts and realize complexity in addition, because unified pattern is proposed for all DwPTS length.The pattern of design can be widely used in such as more high-order mimo, multiuser MIMO (MU-MIMO), the multileaving (CoMP) coordinated and may also have relaying etc. feature.
Accompanying drawing explanation
With in lower part, the present invention describes with reference to the one exemplary embodiment illustrated in the drawings, wherein:
Fig. 1 illustrates exemplary diagram, and it illustrates nearly 4 downlink cell specific reference signals (normal CP) of the prior art;
Fig. 2 illustrates exemplary diagram, and it illustrates a down link UE specific reference signals (normal CP);
Fig. 3 illustrates exemplary diagram, and it illustrates the nearly 4 layers of DM-RS pattern for normal CP of the prior art;
Fig. 4 illustrates demonstrative structure figure, and it illustrates the wireless system with DM-RS pattern according to one embodiment of the invention;
Fig. 5 illustrates flow chart, and it illustrates the method for the channel estimating and detection by using DM-RS pattern according to one embodiment of the invention;
Fig. 6 illustrates the CP order 1-4 pattern of the exemplary extended according to one embodiment of the invention, for normal sub-frames (left side) and the DwPTS(right side);
Fig. 7 illustrates the CP order 5-8 pattern (option one) with the exemplary extended of OCC=4 according to one embodiment of the invention;
Fig. 8 illustrates the CP order 5-8 pattern (option 2) with the exemplary extended of OCC=4 according to one embodiment of the invention; With
Fig. 9 illustrates the CP order 5-8 pattern (option 3) with the exemplary extended of OCC=2 according to one embodiment of the invention.
Embodiment
By reference to accompanying drawing, embodiments of the invention will be described.
Reference signal (RS), as also referred to as predefine training sequence/signal, is widely used in wireless communication system, has the object improving detection perform.Namely, in a wireless communication system, the RS carried by conveyer is responsible for the receiver carrying out channel estimating.By using the relevant detection of the channel condition information (CSI) estimated to be employed, this is considered to the effective ways of improving SNR.
With reference to figure 4, provide the wireless communication system with reference signal, it comprises at least conveyer and receiver.Predefine RS between conveyer and receiver.Conveyer comprises DM-RS pattern maker, for generating the DM-RS pattern of the Cyclic Prefix for expansion; At receiver, channel estimating is by using its target of RS(to be carry out the relevant detection for date restoring) and first applied.Receiver comprises for the channel estimation module by using the DM-RS pattern for the Cyclic Prefix of expansion to estimate channel performance; And for by using the channel condition information CSI being included in estimation in DM-RS be concerned with the channel detection module of detection.DM-RS pattern is supported from order 1 to order 8 to 8 layers of transmission.
Fig. 5 illustrates the method for performing channel estimating in mimo system and detection.The method comprises the following steps:
In step 10, the demodulated reference signal pattern for the Cyclic Prefix of expansion generates from DM-RS pattern maker at conveyer.
In step 20, rely on the DM-RS signal pattern generated, perform channel estimating and detection at receiver respectively by channel estimation module and channel detection module.
DM-RS pattern comprises the order 5-8 pattern supported 8 layers of transmission.
After this, two DM-RS pattern situations, namely order 1-4 pattern and order 5-8 pattern are provided in detail.
situation 1: order 1-4 pattern
As shown in Figure 6, one embodiment of the invention are provided for the DM-RS pattern of nearly four layers of support transmitted.The detection perform of this pattern can be guaranteed for the CP situation expanded.In this drawing, 3 or 2 control characters are presented as the example being respectively used to normal sub-frames and DwPTS.
In this patter sound (patter), the DM-RS expense of every layer of 16 RE is used, and these a little higher than 12 RE(for normal CP are shown in Fig. 3).Every layer of 16 RE are selected at best compromise of channel estimating/make between detection perform and expense.This can solve the problem that accuracy of channel estimation is demoted due to the decline of high-frequency selectivity.
Propose that staggered structure is with further improving SNR.This can be of value to detailed channel estimation method, such as, be widely used for the 2D-MMSE filter method of the transfer mode based on DM-RS.
Punching (punctured) version of normal sub-frames is proposed for all DwPTS situations simply, namely has the DwPTS of 8,9 or 10 OFDM symbol.This can alleviate (ease) UE and realize, because only a DM-RS pattern is used to channel estimating (when being applicable to different DwPTS situations).Certainly, this does not conform to the situation being suitable for the DwPTS with 3 OFDM symbol, reportedly send be expected because countless.
Identical with normal CP situation, CDM+FDM is used to multiplexing nearly four layers substantially.This safeguards the good consistency of the DM-RS design between normal CP and the CP of expansion.In other words, design principle can be shared in large extent.
Good subset design is kept, because no matter different order pattern how, every layer of channel estimating is identical.Such as, layer 1 channel estimating realizes is identical in order 1 and order 4 pattern.
situation 2: order 5-8 pattern
As shown in Fig. 7-9, based on this order 1-4 pattern, three preferred optional DM-RS patterns for order 5-8 pattern are provided to reach 8 layers of transmission with support.This can provide smooth and easy and simple type of design.
Fig. 7 illustrates the option one of the DM-RS pattern for the CP for expansion, wherein OCC=4.It is the resource element that DM-RS retains that option one re-uses in order 1-4 pattern, and this alleviates to a certain extent and realizes in the channel estimating of UE.This option keeps the identical characteristics of order 1-4 pattern, namely for the unified pattern of all DwPTS situations and subset design, structure, every layer of 16 RE of interlocking.As shown in Figure 7, difference has for each CDM group uses the OCC that length is 4, and wherein OCC is that normal sub-frames and DwPTS build in time-frequency domain.Advantage is by having made soft expansion from 2 to 4 amendment OCC length.
For normal sub-frames, DM-RS pattern in option one comprises every layer of 16 RE, and 16 RE comprise in radio frame at R(i, f for CDM group 1) resource element, the wherein f=2,5,8,11 as i=5 or 6, and as i=11 or 12 f=3,6,9,12; For CDM group 2, the f=1,4,7,10 as i=5 or 6, and as i=11 or 12 f=2,5,8,11, wherein i represents i-th symbol in radio frame in time-domain direction, and f represents f subcarrier in direction, radio frame medium frequency territory.
For have 8,9 or 10 OFDM symbol DwPTS(its be the punching version of normal sub-frames), DM-RS pattern in option one comprises every layer of 8 RE, and 8 RE for CDM group 1 comprise in radio frame at R(i, f) resource element, the wherein f=2,5,8,11 as i=5 or 6; For CDM group 2, the f=1,4,7,10 as i=5 or 6; And have i=9,10,11,12 and the RE of f=1 to 12 be perforated.
Fig. 8 illustrates the option 2 of the DM-RS pattern for the CP for expansion, wherein OCC=4.Compared to option one, option 2 provides has another pattern that OCC length is 4.So some similar characteristics are maintained, such as, for the unified pattern of all DwPTS situations and subset design, staggered structure, every layer of 16 RE.Difference be have length be 4 OCC be fabricated in 4 Adjacent resource elements.Advantage is the negative effect that this option can overcome Doppler in high mobility environment effectively, because the orthogonal performance between the OCC used is kept by relatively good.
For normal sub-frames, DM-RS pattern in option 2 comprises every layer of 16 RE, and 16 RE comprise in radio frame at R(i, f for CDM group 1) resource element, the wherein f=4,5,10,11 as i=5 or 6, and as i=11 or 12 f=2,3,8,9; For CDM group 2, the f=1,2,7,8 as i=5 or 6, and as i=11 or 12 f=5,6,11,12, wherein i represents i-th symbol in radio frame in time-domain direction, and f represents f subcarrier in direction, radio frame medium frequency territory.
For have 8,9 or 10 OFDM symbol DwPTS(its be the punching version of normal sub-frames), DM-RS pattern in option 2 comprises every layer of 8 RE, and 8 RE comprise in radio frame at R(i, f for CDM group 1) resource element, the wherein f=4,5,10,11 as i=5 or 6; For CDM group 2, the f=1,2,7,8 as i=5 or 6; And have i=9,10,11,12 and the RE of f=1 to 12 be perforated.
Fig. 9 illustrates the option 3 of the DM-RS pattern for the CP for expansion, wherein OCC=2.Compared to option one/2, option 3 provides different solutions.Altogether 4 CDM groups be proposed and have length be 2 OCC be proposed because nearly 2 layers be multiplexed in CDM group.This option due to OCC length be the 2 very good abilities of orthogonality having between the OCC that safeguards and use.Less DM-RS expense of every layer of 8 RE is proposed, because in the CP of expansion, under similar VehB channel more than 4 layers of application transmitted slowly.So this expense is well to detection perform good under being enough to obtain TU similar channel.Still, some similar characteristics are maintained, such as, for the unified pattern of all DwPTS situations and subset design, staggered structure.
For normal sub-frames, the DM-RS pattern in option 3 comprises every layer of 8 RE, and 8 RE comprise in radio frame at R(i, f for CDM group 1) resource element, the wherein f=5,11 as i=5 or 6, and as i=11 or 12 f=3,9; For CDM group 2, the f=4,10 as i=5 or 6, and as i=11 or 12 f=2,8; For CDM group 3, the f=2,8 as i=5 or 6, and as i=11 or 12 f=6,12; For CDM group 4, the f=1,7 as i=5 or 6, and as i=11 or 12 f=5,11; Wherein i represents i-th symbol in radio frame in time-domain direction, and f represents f subcarrier in direction, radio frame medium frequency territory.
For have 8,9 or 10 OFDM symbol DwPTS(its be the punching version of normal sub-frames), DM-RS pattern in option 3 comprises every layer of 4 RE, and 4 RE for CDM group 1 comprise in radio frame at R(i, f) resource element, the wherein f=5,11 as i=5 or 6; For CDM group 2, the f=4,10 as i=5 or 6; For CDM group 3, the f=2,8 as i=5 or 6; For CDM group 4, the f=1,7 as i=5 or 6; And have i=9,10,11,12 and the RE of f=1 to 12 be perforated.
In the present invention, the staggered pattern with the DM-RS expense of every layer of maximum 16 RE of the CP for expansion is provided.Three preferred optional patterns are proposed for order 5-8 design.Can be observed to support that the aforementioned DM-RS pattern of the CP for expansion of order 5-8 has the following advantages:
-good consistency by adopting the design the same with normal CP and maintained, namely by control channel and the multiplexing TDM of Rel-8CRS and use CDM+FDM as the basic multiplexing scheme between layer.
-be guaranteed based on the detection perform of DM-RS, because pattern has the good capacity of channel frequency territory change in the system that the CP that catches expansion can experience.
The design of-subset is kept alleviating UE as much as possible and is realized.
-being used to all DwPTS length by the unified pattern of punching to the pattern for normal sub-frames, this can limit UE further and realize complexity and increase too much.
Although the present invention is illustrated particularly with reference to its one exemplary embodiment and is described, however it will be appreciated by those skilled in the art that change in various forms and details can when do not deviate from as subsidiary claim the category of the present invention that defines and spirit made.One exemplary embodiment only should be considered and be not used in the object of restriction in the meaning described.Therefore, category of the present invention is not by detailed description of the present invention but is defined by subsidiary claim, and all differences within category will be interpreted as being included in the present invention.
Claims (21)
1., for performing a method for channel estimating in multiple-input and multiple-output mimo system and detection, comprising:
Generate (10) demodulated reference signal DM-RS pattern for the cyclic prefix CP of expansion; With
Estimate based on generated DM-RS signal pattern and detect (20) channel performance; Wherein,
Described DM-RS pattern comprises the order 5-8 pattern supported 8 layers of transmission.
2. method according to claim 1, wherein said DM-RS pattern comprises staggered structure.
3. method according to claim 1 and 2, wherein said DM-RS pattern is the DM-RS expense that the CP expanded adopts every layer of maximum 16 resource element RE.
4. method according to claim 1, wherein in described DM-RS pattern, subset design is kept from order 1 to order 8.
5. method according to claim 1, wherein said DM-RS pattern comprises the punching version of the normal sub-frames for different down link pilot timeslot DwPTS situation.
6. method according to claim 5, described DwPTS situation comprises the DwPTS with 8,9 or 10 OFDM symbol.
7. method according to claim 1, wherein said DM-RS pattern uses code division multiplexing CDM to add next multiplexing nearly four layers of frequency division multiplexing FDM.
8. method according to claim 1, wherein said DM-RS pattern comprises a DM-RS pattern, and a described DM-RS pattern comprises 2 CDM groups altogether, and have length be 4 orthogonal code cover OCC be used to each CDM group.
9. method according to claim 8, wherein said OCC is structured in time-frequency domain, for normal sub-frames and DwPTS.
10. method according to claim 8 or claim 9; wherein for normal sub-frames; a described DM-RS pattern comprises every layer of 16 RE; and described 16 RE comprise in radio frame at R(i for CDM group 1; f) resource element; the wherein f=2,5,8,11 as i=5 or 6, and as i=11 or 12 f=3,6,9,12; For CDM group 2, the f=1,4,7,10 as i=5 or 6, and as i=11 or 12 f=2,5,8,11, wherein, i represents i-th symbol in radio frame in time-domain direction, and f represents f subcarrier in direction, radio frame medium frequency territory.
11. methods according to claim 10, wherein, so the DwPTS with 8,9 or 10 OFDM symbol of the punching version to described normal sub-frames, a described DM-RS pattern comprises every layer of 8 RE, and described 8 RE comprise in radio frame at R(i for CDM group 1, f) resource element, the wherein f=2,5,8,11 as i=5 or 6; For CDM group 2, the f=1,4,7,10 as i=5 or 6; And wherein, have i=9,10,11,12 and the RE of f=1 to 12 be perforated.
12. methods according to claim 1, wherein, described DM-RS pattern comprises the 2nd DM-RS pattern, described 2nd DM-RS pattern comprises 2 CDM groups altogether, and have length be 4 OCC be used to each CDM group, and wherein, have length be 4 described OCC be structured in 4 adjacent resource elements.
13. methods according to claim 12, wherein, for normal sub-frames, described 2nd DM-RS pattern comprises every layer of 16 RE, and described 16 RE comprise in radio frame at R(i for CDM group 1, f) resource element, the wherein f=4,5,10,11 as i=5 or 6, and as i=11 or 12 f=2,3,8,9; For CDM group 2, the f=1,2,7,8 as i=5 or 6, and as i=11 or 12 f=5,6,11,12, wherein, i represents i-th symbol in radio frame in time-domain direction, and f represents f subcarrier in direction, radio frame medium frequency territory.
14. methods according to claim 13, wherein, so the DwPTS with 8,9 or 10 OFDM symbol of the punching version to described normal sub-frames, described 2nd DM-RS pattern comprises every layer of 8 RE, and described 8 RE comprise in radio frame at R(i for CDM group 1, f) resource element, the wherein f=4,5,10,11 as i=5 or 6; For CDM group 2, the f=1,2,7,8 as i=5 or 6; And wherein, have i=9,10,11,12 and the RE of f=1 to 12 be perforated.
15. methods according to claim 1, wherein, described DM-RS pattern comprises the 3rd DM-RS pattern, and described 3rd DM-RS pattern comprises 4 CDM groups altogether, and have length be 2 OCC be used to each CDM group.
16. methods according to claim 15, wherein, for normal sub-frames, described 3rd DM-RS pattern comprises every layer of 8 RE, and described 8 RE comprise in radio frame at R(i for CDM group 1, f) resource element, the wherein f=5,11 as i=5 or 6, and as i=11 or 12 f=3,9; For CDM group 2, the f=4,10 as i=5 or 6, and as i=11 or 12 f=2,8; For CDM group 3, the f=2,8 as i=5 or 6, and as i=11 or 12 f=6,12; For CDM group 4, the f=1,7 as i=5 or 6, and as i=11 or 12 f=5,11; Wherein i represents i-th symbol in radio frame in time-domain direction, and f represents f subcarrier in direction, radio frame medium frequency territory.
17. methods according to claim 16, wherein, so the DwPTS with 8,9 or 10 OFDM symbol of the punching version to described normal sub-frames, described 3rd DM-RS pattern comprises every layer of 4 RE, and described 4 RE comprise in radio frame at R(i for CDM group 1, f) resource element, the wherein f=5,11 as i=5 or 6; For CDM group 2, the f=4,10 as i=5 or 6; For CDM group 3, the f=2,8 as i=5 or 6; For CDM group 4, the f=1,7 as i=5 or 6; And wherein, have i=9,10,11,12 and the RE of f=1 to 12 be perforated.
18. 1 kinds of conveyers, comprise,
Demodulated reference signal DM-RS pattern maker, is suitable for the DM-RS pattern of the Cyclic Prefix generated for expansion; Wherein,
Described DM-RS pattern comprises the order 5-8 pattern supported 8 layers of transmission.
19. 1 kinds of receivers, comprise,
Channel estimation module, is suitable for by using the demodulated reference signal DM-RS pattern of the Cyclic Prefix for expansion to estimate channel performance; With
Channel detection module, is suitable for by using the channel condition information CSI of the estimation comprised in described DM-RS coherently to detect; Wherein,
Described DM-RS pattern comprises the order 5-8 pattern supported 8 layers of transmission.
20. 1 kinds of conveyers, transmit the DM-RS pattern according to any one in claim 10,11,13,14,16 and 17.
21. 1 kinds of receivers, receive the DM-RS pattern according to any one in claim 10,11,13,14,16 and 17
A kind of system, comprises as the conveyer of prescription in claim 17 and the receiver as prescription in claim 18.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107733605A (en) * | 2016-08-12 | 2018-02-23 | 中兴通讯股份有限公司 | Channel measurement feedback method and device, pilot sending method and device |
| CN110365429A (en) * | 2019-07-18 | 2019-10-22 | 珠海格力电器股份有限公司 | Detection method, device and system |
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| WO2008114724A1 (en) * | 2007-03-20 | 2008-09-25 | Ntt Docomo, Inc. | Base station device, mobile station and wireless communication system, and communication control method |
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| WO2008114724A1 (en) * | 2007-03-20 | 2008-09-25 | Ntt Docomo, Inc. | Base station device, mobile station and wireless communication system, and communication control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733605A (en) * | 2016-08-12 | 2018-02-23 | 中兴通讯股份有限公司 | Channel measurement feedback method and device, pilot sending method and device |
| CN107733605B (en) * | 2016-08-12 | 2022-06-17 | 中兴通讯股份有限公司 | Channel measurement feedback method and device and pilot frequency sending method and device |
| CN110365429A (en) * | 2019-07-18 | 2019-10-22 | 珠海格力电器股份有限公司 | Detection method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105337718B (en) | 2018-09-14 |
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