CN106911439A - A kind of pilot signal adaptive method of mimo system, base station and user equipment - Google Patents

A kind of pilot signal adaptive method of mimo system, base station and user equipment Download PDF

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Publication number
CN106911439A
CN106911439A CN201510975242.7A CN201510975242A CN106911439A CN 106911439 A CN106911439 A CN 106911439A CN 201510975242 A CN201510975242 A CN 201510975242A CN 106911439 A CN106911439 A CN 106911439A
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CN
China
Prior art keywords
pilot signal
enb
sequence
training sequence
send
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CN201510975242.7A
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Chinese (zh)
Inventor
刘斌越
吴克颖
佘锋
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上海贝尔股份有限公司
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Priority to CN201510975242.7A priority Critical patent/CN106911439A/en
Publication of CN106911439A publication Critical patent/CN106911439A/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals
    • H04L25/0228Channel estimation using sounding signals with direct estimation from sounding signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Abstract

A kind of pilot signal adaptive method of mimo system, base station and user equipment, wherein the pilot signal adaptive method includes:Transmission includes the downlink signaling of sequence instruction to user equipment (UE);Receive the pilot signal that sequences of the UE in the downlink signaling indicates to send.The downlink signaling for including sequence instruction is actively sent by base station end to user equipment, so that user equipment indicates pilot signal transmitted according to sequence, to make up the influence that eNB configurations low resolution A/D C is caused to channel estimating performance, so that the above-mentioned extensive MIMO alternatives for being given, low resolution A/D C is configured i.e. at eNB, is achieved.

Description

A kind of pilot signal adaptive method of mimo system, base station and user equipment

Technical field

A kind of pilot signal the present invention relates to wireless communication field, more particularly to mimo system is adapted to Method, base station and user equipment.

Background technology

Extensive MIMO (Multiple-input Multiple-Output, multiple-input and multiple-output) is that have Traditional MIMO technology is developed, and extensive multiple antennas are used by base station end (eNB), and Multiple users are served simultaneously, so as to be 5G communication systems for channel speed brings very big lifting The crucial support of system.

In existing mimo system, each antenna of eNB is connected to a pair of high-resolution (examples Such as:Analog-digital converter (Analog to Digital Converter, ADC) 14-bit), will simulation Signal is converted to the data signal for easily facilitating treatment.However, this deployment is unsuitable on a large scale Mimo system, a large amount of high resolution A/D C for being primarily due to deployment cause high power consumption and height hard Part cost, thus results in the burden that large-scale mimo system is implemented, therefore for solving this problem A kind of alternative be in extensive mimo system dispose low resolution (for example:1-bit) ADC.But because channel estimation is in time division multiplex (Time Division Duplex, TDD) system Train what is completed by up-link, and to avoid pilot pollution, different user equipment (UE) meetings Send training length and be equal to the quadrature training sequence (conventional training sequence) of UE numbers to eNB, therefore When the ADC of low resolution is deployed in mimo system, severe quantization error can cause eNB to connect The signal quality for receiving is decreased obviously.

The content of the invention

The pilot signal adaptive method of mimo system of the present invention, base station and user equipment can Ensure the channel estimation and signal detection quality during eNB configuration low resolution A/D C.

One embodiment includes the pilot signal adaptive method of a mimo system, and it includes:

Transmission includes the downlink signaling of sequence instruction to user equipment (UE);

Receive the pilot signal that sequences of the UE in the downlink signaling indicates to send.

The pilot signal adaptive method of another mimo system of embodiment one, it includes:

Receive the downlink signaling for including sequence instruction that base station end eNB sends;

Sequence in the downlink signaling indicates pilot signal transmitted to eNB.

The base station that the pilot signal of another mimo system of embodiment one is adapted to, it includes:

First sending module, the downlink signaling of sequence instruction is included for sending to user equipment UE;

First receiver module, hair is indicated for receiving sequences of the UE in the downlink signaling Send pilot signal.

The user equipment that the pilot signal of another mimo system of embodiment one is adapted to, it includes:

Second receiver module, the descending chain for including sequence instruction for receiving base station end eNB transmissions Line signaling;

Second sending module, indicates to send pilot tone letter for the sequence in the downlink signaling Number give eNB.

The embodiment of the present invention is actively sent by base station end and includes the downlink signaling that sequence is indicated To user equipment, so that user equipment indicates pilot signal transmitted according to sequence, to make up eNB configurations The influence that low resolution A/D C is caused to channel estimating performance so that it is above-mentioned be given it is extensive MIMO alternatives, i.e., configure low resolution A/D C at eNB, is achieved.

Brief description of the drawings

The present invention, wherein phase are will be more fully understood by the detailed description and the accompanying drawings forth below Same unit is indicated by the same numbers, and accompanying drawing is merely possible to illustrate what is provided, therefore unexpectedly Figure is limited the invention, and wherein:

Fig. 1 is shown according to a pilot signal adaptation side for the mimo system of exemplary embodiment The flow chart of method.

Fig. 2 shows that the pilot signal of the mimo system according to another exemplary embodiment is adapted to The flow chart of method.

Fig. 3 shows that the pilot signal of the mimo system according to another exemplary embodiment is adapted to The flow chart of method.

Fig. 4 to show and adapt to base according to a pilot signal for the mimo system of exemplary embodiment The structured flowchart stood.

Fig. 5 shows that the pilot signal of the mimo system according to another exemplary embodiment is adapted to The structured flowchart of base station.

Fig. 6 shows and adapt to use according to a pilot signal for the mimo system of exemplary embodiment The structured flowchart of family equipment.

Fig. 7 shows with eNB there is 32 reception antennas, and single UE is configured with SER as a example by single antenna Numerical Simulation Results, wherein, -1.05dB is represented as the whole high-resolution ADC of deployment of eNB Shi Xianyou training programs reach 10-3Required transmission signal to noise ratio during error sign ratio, -0.75dB is represented and is worked as eNB All existing training program (N=1) reaches 10 during deployment low resolution (1-bit) ADC-3Erratum number Required transmission signal to noise ratio during rate, 0.95dB is represented when eNB all disposes low resolution (1-bit) The scheme being trained using the pilot signal of the embodiment of the present invention N=2 during ADC reaches 10-3Erratum number Required transmission signal to noise ratio during rate, 3.20dB is represented when eNB all disposes low resolution (1-bit) The scheme being trained using the pilot signal of the embodiment of the present invention N=4 during ADC reaches 10-3Erratum number Required transmission signal to noise ratio during rate.

It should be mentioned that the side that these accompanying drawing meant for illustration are utilized in some of the exemplary embodiments The general characteristic of method, structure and/or material, and written description to providing below makes supplement.But It is that these accompanying drawings are not necessarily drawn to scale and may accurately not reflect any given embodiment Accurate structure or Performance Characteristics, and be not interpreted as defining or limiting by exemplary implementation Numerical value or the scope of attribute that example is covered.Accompanying drawing be similar to or identical is used in each width figure Mark is to show the presence of similar or identical unit or feature.

Specific embodiment

Although exemplary embodiment can have various modifications and alternative forms, in the accompanying drawings with citing Some embodiments for being shown in which of mode, and will be described in detail herein.But It should be appreciated that be not intended for exemplary embodiment to be restricted to disclosed concrete form, conversely, Exemplary embodiment be intended to cover fall within the scope of the appended claims all modifications, equivalents and Alternative.Identical reference refers to identical unit all the time in the description of each width figure.

It should be mentioned that some exemplary implementations before exemplary embodiment is discussed in greater detail Example is described as treatment or the method described as flow chart.Although be described as operations by flow chart The treatment of order, but many of which operation can be implemented concurrently, concomitantly or simultaneously. Additionally, the order of operations can be rearranged.The treatment when its operations are completed can be by Terminate, it is also possible to have the additional step being not included in accompanying drawing.The treatment can correspond to Method, function, code, subroutine, subprogram etc..

Term " wireless device " used herein above or " equipment " can be considered as synonymous with the following And the following can be referred to as sometimes below:Client, user equipment, movement station, shifting Employ family, mobile terminal, subscriber, user, distant station, access terminal, receiver, mobile unit etc. Deng, and the long-distance user of Radio Resource in cordless communication network can be described.

Similarly, term " base station " used herein above can be considered as it is synonymous with the following and The following can be hereinafter referred to as sometimes:B node, evolved B node, eNodeB, transmitting-receiving Device base station (BTS), RNC etc., and can describe that the nothing of multiple technology generations can be being crossed over Communicated with mobile terminal in line communication network and provided Radio Resource transceiver.Except implementing this In outside the ability of method that is discussed, base station discussed herein can have and traditional many institute's weeks The institute that the base station known is associated is functional.

Method (some of them are illustrated by flow) discussed hereafter can by hardware, software, Firmware, middleware, microcode, hardware description language or its any combination are implemented.When with software, When firmware, middleware or microcode are to implement, it is used to implement the program code or code segment of necessary task Can be stored in machine or computer-readable medium (such as storage medium).(one or more) Processor can implement necessary task.

Concrete structure disclosed herein and function detail are only representational, and are for describing The purpose of exemplary embodiment of the invention.But the present invention can be by many alternative forms come specific Realize, and be not interpreted as being limited only by the embodiments set forth herein.

Although it should be appreciated that may have been used term " first ", " second " etc. herein to retouch Unit is stated, but these units should not be limited by these terms.It is only using these terms In order to a unit and another unit are made a distinction.For example, without departing substantially from exemplary implementation In the case of the scope of example, first module can be referred to as second unit, and similarly second unit First module can be referred to as.Term "and/or" used herein above includes that one of them or more is listed Any and all combination of the associated item for going out.

It should be appreciated that it is referred to as " connection " or during " coupled " to another unit when a unit, its Another unit can be connected or coupled to, or there may be temporary location.On the other hand, When a unit is referred to as " when being directly connected " or " directly coupled " to another unit, then in the absence of centre Unit.Other words for being used for describing the relation between unit should in a comparable manner be explained (such as compared to " between being directly in ... " " between being in ... ", " with ... it is neighbouring " compared to " with ... directly It is neighbouring " etc.).

Term used herein above is not intended to limit exemplary just for the sake of description specific embodiment Embodiment.Unless the context clearly dictates otherwise, singulative " one " otherwise used herein above, " one " alsos attempt to include plural number.It is to be further understood that term used herein above " including " and/ Or "comprising" specifies the presence of stated feature, integer, step, operation, unit and/or component, And do not preclude the presence or addition of one or more other features, integer, step, operation, unit, group Part and/or its combination.

It should further be mentioned that in some replaces realization modes, the function/action being previously mentioned can be by Occur according to the order different from being indicated in accompanying drawing.For example, depending on involved function/action, The two width figures for showing in succession can essentially substantially simultaneously perform or sometimes can be according to opposite Order is performed.

Unless otherwise defined, all terms (including technology and scientific terminology) otherwise used herein are all With with exemplary embodiment art in the identical implication that is generally understood of technical staff.Also It should be appreciated that unless be explicitly defined herein, it is fixed otherwise for example in usually used dictionary Those terms of justice should be construed as the implication phase one for having with it in the context of association area The implication of cause, without that should be explained according to Utopian or excessively formal meaning.

The embodiment of the present invention is suitable for being deployed with high resolution A/D C's while existing in mimo system The situation of the eNB and eNB for being deployed with low resolution A/D C, is actively sent comprising orderly by eNB The downlink signaling for indicating is arranged to UE, to indicate UE to be directed to the eNB for being deployed with low resolution A/D C The pilot signal of enhanced long training sequence is sent, is indicated UE to be directed to and is deployed with high resolution A/D C ENB send conventional training sequence pilot signal, so as to ensure systematic function.The embodiment of the present invention Described high-resolution ADC refers generally to the ADC, the ADC of low resolution more than or equal to 10-bit Generally refer to the ADC less than 10-bit.Enhanced long training sequence described in the embodiment of the present invention is general For the repetition of at least two conventional training sequences is sorted.

The present invention is described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is the pilot signal adaptive method of the mimo system of the one embodiment according to the application Flow chart.

With reference to shown in Fig. 1, for eNB sides, the pilot tone of the mimo system described in the present embodiment Signal adaptation method, comprises the following steps:

S110, transmission include the downlink signaling of sequence instruction to user equipment (UE);

S120, the pilot signal for receiving sequence instruction transmissions of the UE in the downlink signaling.

Each step is described in further detail below.

In step S110, the resolution ratio according to ADC determines that sequence is indicated, if eNB deployment high scores The ADC of resolution, it indicates that send the pilot signal of conventional training sequence;If eNB disposes low resolution The ADC of rate, it indicates that send the pilot signal of enhanced long training sequence.For example:If eNB portions Affix one's name to the ADC of 14-bit, it indicates that send the quadrature training sequence (that training length is equal to UE numbers As be the training sequence of symbol) pilot signal;If eNB disposes the ADC of 1-bit, refer to Show and send enhanced long training sequence (training sequence of generally two symbols or 4 training of symbol Sequence) pilot signal.

Specifically, when eNB different in network is configured with the ADC of different resolution, UE is wished The eNB that prestige is communicated can notify UE by sending an extra downlink signaling, and it is configured ADC resolution ratio, the downlink signaling comprising represent ADC resolution ratio bit number. For example during eNB configuration 3-bit ADC, the content of this downlink signaling can use binary-coded character String 0011 is represented, because the high resolution A/D C for generally using is 12bit, therefore, use here Tetrad (symbol) can just represent all possible ADC resolution values.Therefore eNB The length that transmission includes the downlink signaling of sequence instruction is typically only a symbol.

In step S120, the pilot signal that the UE for receiving sends can be leading for conventional training sequence The pilot signal of frequency signal or enhanced long training sequence, for example:Conventional training sequence is equal to for length The quadrature training sequence of UE numbers, generally one training sequence of symbol;Enhanced training sequence long Row, generally two training sequences or 4 training sequences of symbol of symbol.In the embodiment of the present invention Enhanced long training sequence and conventional training sequence differ only in pilot length, therefore generally conventional The repetition sequence of training sequence.Such as conventional training sequence is " emklhg ", then two enhancings of character Type long training sequence is " emklhgemklhg ", and the enhanced long training sequence of four characters is “emklhgemklhgemklhgemklhg”。

As optional, before step S110, can also include:

Step S100, determines that eNB disposes the ADC of low resolution.Because ADC is a kind of by mould Intend the device that signal is converted to data signal, it is in eNB productions it has been determined that therefore this device is believed Breath is known for eNB.Specifically, judge whether to be deployed with eNB the ADC of low resolution, As the eNB of the ADC for not having to dispose low resolution in mimo system, using in existing eNB Training program during all high-resolution ADC, i.e., send downlink signaling without eNB, UE directly transmits training length and is equal to the quadrature training sequence of UE numbers to eNB, to complete channel Estimate.When there is the eNB of the ADC for being deployed with low resolution in mimo system, then by step Rapid S110 indicates UE to send the pilot signal of enhanced long training sequence for the ADC of low resolution, UE is indicated to send the pilot signal of conventional training sequence for high-resolution ADC, to complete channel Estimate.

Used as optional, the pilot signal that eNB sends according to UE carries out channel estimation, i.e., according to often The pilot signal of the pilot signal or enhanced long training sequence of advising training sequence carries out channel status letter The estimation of (CSI, Channel State Information) is ceased, typically using traditional MMSE (Minimum Mean Square Error, least mean-square error) channel estimation scheme, i.e. by UE Signal of the pilot signal of transmission after ADC samples is used for MMSE channel estimations.Connect with tradition The different place of receipts machine is when pilot signal is estimated by the ADC of low resolution for MMSE channels Timing can be influenceed by extra quantization noise, so that the embodiment of the present invention is using enhanced training sequence long Row can obtain accurate channel estimation, because the method that channel estimation is carried out according to pilot signal is existing There is technology, therefore no longer repeated herein.The data that UE sends are received and detected after channel estimation Transmission signal, i.e., further detected, specifically to the data transfer signal that the UE for receiving sends The data transfer signal that monitoring UE is uploaded also is prior art, therefore is not also being repeated herein.

With reference to shown in Fig. 2, for UE sides, the pilot tone of the mimo system described in the present embodiment is believed Number adaptive method, comprises the following steps:

S210, the downlink signaling for including sequence instruction for receiving eNB transmissions;

S220, the sequence in the downlink signaling indicate pilot signal transmitted to eNB.

In step S210, if eNB disposes high-resolution ADC, sequence is designated as sending conventional The pilot signal of training sequence;If eNB disposes the ADC of low resolution, sequence is designated as sending The pilot signal of enhanced long training sequence.For example:If eNB disposes the ADC of 14-bit, sequence Row be designated as sending training length be equal to UE numbers quadrature training sequence (generally one symbol Training sequence) pilot signal;If eNB disposes the ADC of 1-bit, sequence is designated as sending and increases Strong type long training sequence (generally two training sequences or 4 training sequences of symbol of symbol) Pilot signal.

In step S220, if the downlink signaling indicates to send the pilot tone letter of conventional training sequence Number, then the pilot signal of conventional training sequence is sent to eNB;If the downlink signaling indicates hair Send the pilot signal of enhanced long training sequence, then send the pilot signal of enhanced long training sequence to eNB.For example:If the downlink signaling indicates to send the pilot signal of conventional training sequence, Send the pilot signal that length is equal to the quadrature training sequence of UE numbers, generally one instruction of symbol Practice the pilot signal of sequence;If the downlink signaling indicates to send leading for enhanced long training sequence Frequency signal, then send the pilot tone letter for being generally two symbols or 4 enhanced long training sequences of symbol Number.

With reference to shown in Fig. 3, for UE and eNB sides, the mimo system described in the present embodiment Pilot signal adaptive method, comprise the following steps:

S310, eNB send the downlink signaling for including sequence instruction to user equipment (UE);

Specifically, if eNB disposes high-resolution ADC, sequence is designated as sending conventional training The pilot signal of sequence;If eNB disposes the ADC of low resolution, sequence is designated as sending enhancing The pilot signal of type long training sequence.For example:If eNB disposes the ADC of 14-bit, sequence refers to It is shown as sending quadrature training sequence (generally one training of symbol that training length is equal to UE numbers Sequence) pilot signal;If eNB disposes the ADC of 1-bit, sequence is designated as sending enhanced The pilot tone of long training sequence (generally two training sequences or 4 training sequences of symbol of symbol) Signal.

The sequence of S320, UE in the downlink signaling indicates pilot signal transmitted to eNB;

Specifically, if the downlink signaling indicates to send the pilot signal of conventional training sequence, The pilot signal of conventional training sequence is sent to eNB;If the downlink signaling indicates to send enhancing The pilot signal of type long training sequence, then send the pilot signal of enhanced long training sequence to eNB.

S330, eNB carry out channel estimation according to the pilot signal;

Specifically, according to the conventional training sequence for receiving pilot signal or enhanced long training sequence Pilot signal carry out the estimation of CSI, channel estimation is carried out by the pilot signal of conventional training sequence The signaling consumption caused by up-link training can be reduced, by the pilot tone of enhanced long training sequence Signal carries out channel estimation can ensure the performance of system.

S340, UE send data transfer signal to eNB;

Specifically, UE will send data transfer signal to eNB after pilot signal transmitted.

S350, eNB receive and detect the data transfer signal that UE sends.

Specifically, eNB is detected to the data transfer signal that UE is uploaded.

For UE and eNB sides, the pilot signal adaptation side of the mimo system described in the present embodiment Method, with the ADC of the eNB1 of the ADC comprising deployment 3-bit in mimo system and deployment 12-bit ENB2 as a example by, UE1 wishes to be communicated with eNB1, and UE2 wishes to be communicated with eNB2, specifically Realize that step can include:

First, eNB1 determines that its ADC for being deployed with 3-bit, eNB2 determine the ADC of its deployment 12-bit.

2nd, eNB1 sends the downlink signaling of " 0011 " to UE1, and eNB2 sends " 1100 " Downlink signaling is to UE2.

Specifically, eNB1 sends " 0011 " and represents that its ADC for being deployed with 3-bit, eNB2 send " 1100 " represent its ADC for being deployed with 12-bit.

3rd, UE1 sends " emklhgemklhgemklhgemklhg " (4 words according to downlink signaling Symbol) enhanced long training sequence pilot signal to eNB1, UE2 sends out according to downlink signaling The pilot signal of conventional training sequence of " emklhg " (1 character) is sent to eNB2.

4th, eNB1 carries out channel and estimates according to the pilot signal of " emklhgemklhgemklhgemklhg " Meter, eNB2 carries out channel estimation according to the pilot signal of " emklhg ".

Specifically, eNB1 estimates according to the pilot signal of enhanced long training sequence for MMSE channels Meter, can make it that more accurately channel estimation is obtained under the influence of extra quantization noise.

5th, UE1 and eNB1 carries out the communication of digital transmission signal, and UE2 and eNB2 carries out numeral The communication of transmission signal.

With reference to shown in Fig. 4, the base station of the pilot signal adaptation of the mimo system described in the present embodiment, Including following device:

First sending module 110, the downlink signaling of sequence instruction is included for sending to user Equipment UE;

First receiver module 120, refers to for receiving sequences of the UE in the downlink signaling Show pilot signal transmitted.

Each device is described in further detail below:

As shown in figure 5, first sending module 110 can include that sequence indicates submodule 510, Sequence indicates submodule 510 to be configured as:Resolution ratio according to ADC determines that sequence is indicated, if eNB Dispose high-resolution ADC, it indicates that send the pilot signal of conventional training sequence;If eNB portions Affix one's name to the ADC of low resolution, it indicates that send the pilot signal of enhanced long training sequence.For example:If ENB disposes the ADC of 14-bit, it indicates that send the orthogonal training sequence that training length is equal to UE numbers Arrange the pilot signal of (generally one training sequence of symbol);If eNB disposes the ADC of 1-bit, Then indicate to send enhanced long training sequence (training sequence of generally two symbols or 4 symbols Training sequence) pilot signal.

Specifically, when eNB different in network is configured with the ADC of different resolution, UE is wished The eNB that prestige is communicated can notify UE by sending an extra downlink signaling, and it is configured ADC resolution ratio, the downlink signaling comprising represent ADC resolution ratio bit number. For example during eNB configuration 3-bit ADC, the content of this downlink signaling can use binary-coded character String 0011 is represented, because the high resolution A/D C for generally using is 12bit, therefore, use here Tetrad (symbol) can just represent all possible ADC resolution values.Therefore eNB The length that transmission includes the downlink signaling of sequence instruction is typically only a symbol.

First receiver module 120 is configured as:The pilot signal that the UE that receives sends can be with It is the pilot signal of conventional training sequence or the pilot signal of enhanced long training sequence, for example:It is conventional Training sequence is the quadrature training sequence that length is equal to UE numbers, the generally one training sequence of symbol Row;Enhanced long training sequence, the training sequence or 4 training sequences of symbol of generally two symbols Row.Enhanced long training sequence and conventional training sequence differs only in pilot tone in the embodiment of the present invention Length, therefore the generally repetition sequence of conventional training sequence.Such as conventional training sequence is " emklhg ", Then two enhanced long training sequences of character are " emklhgemklhg ", four enhanced length of character Training sequence is " emklhgemklhgemklhgemklhg ".

As optional, as shown in figure 5, the base station that the pilot signal is adapted to can also include:

Determining module 520, for determining that eNB disposes the ADC of low resolution.Because ADC is one Kind convert analog signals into the device of data signal, its in eNB productions it has been determined that therefore this Device information is known for eNB.Specifically, judge whether be deployed with low resolution in eNB ADC, as the eNB of the ADC for not having to dispose low resolution in mimo system, using existing There is training program during all high-resolution ADC in eNB, i.e., send descending chain without eNB Line signaling, UE directly transmits training length and is equal to the quadrature training sequence of UE numbers to eNB, with Complete channel estimation.When there is the eNB of the ADC for being deployed with low resolution in mimo system, Then UE is indicated to send enhanced long training sequence for the ADC of low resolution by step S110 Pilot signal, indicates UE to send the pilot signal of conventional training sequence for high-resolution ADC, To complete channel estimation.

As optional, as shown in figure 5, the base station that the pilot signal is adapted to can also include:

Channel estimation module 530 is configured as:Channel estimation is carried out according to the pilot signal that UE sends, The pilot signal of pilot signal or enhanced long training sequence i.e. according to conventional training sequence carries out CSI Estimation, typically using traditional MMSE (Minimum Mean Square Error, lowest mean square Error) channel estimation scheme, i.e. signal of the pilot signal for sending UE after ADC samples For MMSE channel estimations.The place different from traditional receivers is when pilot signal is by low The ADC of resolution ratio is used to be influenceed by extra quantization noise during MMSE channel estimations, so that The embodiment of the present invention can obtain accurate channel estimation using enhanced long training sequence, due to basis The method that pilot signal carries out channel estimation is prior art, therefore is no longer repeated herein.

First receiver module 120, is additionally operable to receive the data transfer signal that UE sends, and will The data transfer signal is sent to detection module 540;

Detection module 540 is configured as:The data transfer signal that detection UE sends, specifically, The data transfer signal that the UE for receiving sends further is detected after channel estimation, specific prison The data transfer signal for surveying UE uploads is also prior art, therefore is not also being repeated herein.

With reference to shown in Fig. 6, the use of the pilot signal adaptation of the kind mimo system described in the present embodiment Family equipment, including following device:

Second receiver module 210, for receive base station end eNB transmission include sequence indicate under Line link signaling;

Second sending module 220, indicates transmission to lead for the sequence in the downlink signaling Frequency signal is to eNB.

Each device is described in further detail below:

In second receiver module 210, if eNB disposes high-resolution ADC, sequence is designated as Send the pilot signal of conventional training sequence;If eNB disposes the ADC of low resolution, sequence refers to It is shown as sending the pilot signal of enhanced long training sequence.For example:If eNB disposes the ADC of 14-bit, Then sequence is designated as sending quadrature training sequence (generally one symbol that training length is equal to UE numbers Number training sequence) pilot signal;If eNB disposes the ADC of 1-bit, sequence is designated as hair Send enhanced long training sequence (generally two training sequences or 4 training sequences of symbol of symbol) Pilot signal.

Second sending module 220 is configured as:If the downlink signaling indicates to send conventional training The pilot signal of sequence, then send the pilot signal of conventional training sequence to eNB;If the descending chain Line signaling indicates to send the pilot signal of enhanced long training sequence, then send enhanced long training sequence Pilot signal to eNB.For example:If the downlink signaling indicates to send conventional training sequence Pilot signal, then send the pilot signal that length is equal to the quadrature training sequence of UE numbers, generally One pilot signal of the training sequence of symbol;If the downlink signaling indicates to send enhanced length The pilot signal of training sequence, then send the training enhanced long for being generally two symbols or 4 symbols The pilot signal of sequence.

In order to check pilot signal adaptive method, the base station of the mimo system described in the embodiment of the present invention And user equipment, there are 32 reception antennas with eNB, and as a example by the reception antenna is single antenna, it is right It is a symbol, i.e. N=1, for enhanced instruction long to use training sequence length in conventional training sequence It is two symbols and four symbols, i.e. N=2,4 to practice sequence length.

Sequences of the UE in the downlink signaling indicates pilot signal transmitted to eNB, eNB During the pilot signal sent according to UE carries out channel estimation, maximum a posteriori probability (MAP, Maximum A-Posterior) channel estimation is used in eNB.Due to the application of a large amount of antennas, eNB Synthesize to derive UE transmission data transfer signals to eNB using simple high specific, eNB detections are uploaded Data transfer signal be followed by collect mail number soft detection, when UE with unit power send QPSK (just Hand over phase-shift keying (PSK), Quadrature Phase Shift Keyin) signal when reach 10-3Error sign ratio (SER) Numerical Simulation Results it is as shown in Figure 7.Fig. 7 can be seen that:When 1-bitADC is deployed in eNB When and send be the pilot signal of N=1 when, it is certain in SER levels with existing training program compared with It is 10-3When, there are 3.95dB hydraulic performance declines.But when send be the pilot signal of N=2 when, it is and existing It is 10 to have training program to compare in SER levels-3When have 1.7dB hydraulic performance declines, this can be receiving, But when send be the pilot signal of N=4 when, with existing training program compared with SER levels be 10-3 When have 0.3dB performance improvements, therefore simulation result shows, the embodiment of the present invention is in mimo system The training program for having the eNB of the eNB and low resolution A/D C of high resolution A/D C simultaneously can have The performance of the lifting channel estimation of effect.

The pilot signal adaptive method of the mimo system described in the embodiment of the present invention, base station and user set It is standby when eNB be deployed with it is substantial amounts of be connected to low resolution A/D C antennas when, enhanced training sequence long The training program of row ensure that acceptable systematic function.When in mimo system simultaneously exist two classes During base station, i.e., exist simultaneously and be deployed with the base station of low resolution A/D C and be deployed with high resolution A/D C Base station, the pilot signal adaptive method effect described in the embodiment of the present invention is significant.It is of the invention real Example is applied in terms of SER, significant performance reduction caused by existing solution is solved the problems, such as, from And allow that the eNB of the ADC with low resolution in mimo system is supported, so that firmly The power consumption of part cost and extensive mimo system is significantly reduced.Simultaneously because the present invention is implemented The downlink signaling indicated containing sequence that eNB sends in example is untapped in current system, therefore Detection gets up also more convenient, in order to avoid mutually obscure with other signalings.

It should be noted that the present invention can be carried out in the assembly of software and/or software with hardware, For example, each device of the invention can be using application specific integrated circuit (ASIC) or any other is similar hard Part equipment is realized.In one embodiment, software program of the invention can be by computing device To realize steps described above or function.Similarly, software program of the invention (including related number According to structure) can be stored in computer readable recording medium storing program for performing, for example, RAM memory, magnetic Or CD-ROM driver or floppy disc and similar devices.In addition, some steps of the invention or function can be used Hardware is realized, for example, coordinating so as to perform the circuit of each step or function as with processor.

It is obvious to a person skilled in the art that the invention is not restricted to the thin of above-mentioned one exemplary embodiment Section, and without departing from the spirit or essential characteristics of the present invention, can be with other specific Form realizes the present invention.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary , and be nonrestrictive, the scope of the present invention is limited by appended claims rather than described above It is fixed, it is intended that all changes fallen in the implication and scope of the equivalency of claim are included In the present invention.The right that any reference in claim should not be considered as involved by limitation will Ask.Furthermore, it is to be understood that " including " word is not excluded for other units or step, odd number is not excluded for plural number.System The multiple units or device stated in system claim can also pass through software by a unit or device Or hardware is realized.The first, the second grade word is used for representing title, and is not offered as any specific Order.

Claims (14)

1. the pilot signal adaptive method of a kind of mimo system, it includes:
Transmission includes the downlink signaling of sequence instruction to user equipment (UE);
Receive the pilot signal that sequences of the UE in the downlink signaling indicates to send.
2. the pilot signal adaptive method of claim 1, the descending chain that sequence is indicated is included sending Before line signaling is to user equipment (UE), also include:
Determine that base station end eNB disposes the analog-digital converter ADC of low resolution.
3. the pilot signal adaptive method of claim 2, wherein, the transmission includes sequence instruction Downlink signaling include to user equipment (UE) step:
Resolution ratio according to ADC determines that sequence is indicated, if eNB disposes high-resolution ADC, Indicate the pilot signal of transmission conventional training sequence;If eNB disposes the ADC of low resolution, refer to Show the pilot signal for sending enhanced long training sequence.
4. the pilot signal adaptive method described in any one of claim 1-3, the pilot signal is normal Rule training sequence or enhanced long training sequence.
5. the pilot signal adaptive method described in any one of claim 1-3, also includes:
Channel estimation is carried out according to the pilot signal;
Receive and detect the data transfer signal that UE sends.
6. the pilot signal adaptive method of a kind of mimo system, it includes:
Receive the downlink signaling for including sequence instruction that base station end eNB sends;
Sequence in the downlink signaling indicates pilot signal transmitted to eNB.
7. the pilot signal adaptive method of claim 6, described according in the downlink signaling The step of sequence indicates pilot signal transmitted to eNB includes:
If the downlink signaling indicates to send the pilot signal of conventional training sequence, send conventional The pilot signal of training sequence is to eNB;If the downlink signaling indicates to send enhanced training long The pilot signal of sequence, then send the pilot signal of enhanced long training sequence to eNB.
8. the base station that a kind of pilot signal of mimo system is adapted to, it includes:
First sending module, the downlink signaling of sequence instruction is included for sending to user equipment UE;
First receiver module, hair is indicated for receiving sequences of the UE in the downlink signaling The pilot signal sent.
9. the base station that the pilot signal of claim 8 is adapted to, also includes:
Determining module, for determining that base station end eNB disposes the analog-digital converter ADC of low resolution.
10. the base station that the pilot signal of claim 9 is adapted to, wherein, the first sending module bag Include:
Sequence indicates submodule, for determining that sequence is indicated according to the resolution ratio of ADC, if eNB portions Affix one's name to high-resolution ADC, it indicates that send the pilot signal of conventional training sequence;If eNB is disposed The ADC of low resolution, it indicates that send the pilot signal of enhanced long training sequence.
The base station that pilot signal described in 11. claim any one of 8-10 is adapted to, described first receives Pilot signal in module is conventional training sequence or enhanced long training sequence.
The base station that pilot signal described in 12. claim any one of 8-10 is adapted to, also includes:
Channel estimation module, for carrying out channel estimation according to the pilot signal;
First receiver module, is additionally operable to receive the data transfer signal that UE sends;
Detection module, for detecting the data transfer that the UE that first receiver module is received sends Signal.
The user equipment that a kind of pilot signal of 13. mimo systems is adapted to, it includes:
Second receiver module, the descending chain for including sequence instruction for receiving base station end eNB transmissions Line signaling;
Second sending module, indicates to send pilot tone letter for the sequence in the downlink signaling Number give eNB.
The user equipment that the pilot signal of 14. claims 13 is adapted to, second sending module, tool If body is used for the downlink signaling to indicate to send the pilot signal of conventional training sequence, send normal The pilot signal of training sequence is advised to eNB;If the downlink signaling indicates to send enhanced instruction long Practice the pilot signal of sequence, then send the pilot signal of enhanced long training sequence to eNB.
CN201510975242.7A 2015-12-22 2015-12-22 A kind of pilot signal adaptive method of mimo system, base station and user equipment CN106911439A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110149285A (en) * 2019-04-28 2019-08-20 中国科学院计算技术研究所 A method of reducing phase error in the high order modulation of low bit quantization

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060209979A1 (en) * 2005-01-07 2006-09-21 Kabushiki Kaisha Toshiba Frequency offset tracking
CN101090286A (en) * 2006-06-12 2007-12-19 清华大学 Radio system, base station device and terminal device
CN101299871A (en) * 2007-04-30 2008-11-05 大唐移动通信设备有限公司 Method, system, base station and terminal for transmitting upstream detection pilot frequency
CN101674281A (en) * 2009-09-30 2010-03-17 南通大学 Pilot frequency pattern design method based on channel environment judgment
CN105099636A (en) * 2014-05-16 2015-11-25 电信科学技术研究院 Pilot signal sending method, channel information feedback method and device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060209979A1 (en) * 2005-01-07 2006-09-21 Kabushiki Kaisha Toshiba Frequency offset tracking
CN101090286A (en) * 2006-06-12 2007-12-19 清华大学 Radio system, base station device and terminal device
CN101299871A (en) * 2007-04-30 2008-11-05 大唐移动通信设备有限公司 Method, system, base station and terminal for transmitting upstream detection pilot frequency
CN101674281A (en) * 2009-09-30 2010-03-17 南通大学 Pilot frequency pattern design method based on channel environment judgment
CN105099636A (en) * 2014-05-16 2015-11-25 电信科学技术研究院 Pilot signal sending method, channel information feedback method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110149285A (en) * 2019-04-28 2019-08-20 中国科学院计算技术研究所 A method of reducing phase error in the high order modulation of low bit quantization

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