CN101170396B - Pilot signal transmission method for enhanced multi-transmission antenna system - Google Patents
Pilot signal transmission method for enhanced multi-transmission antenna system Download PDFInfo
- Publication number
- CN101170396B CN101170396B CN2006101503291A CN200610150329A CN101170396B CN 101170396 B CN101170396 B CN 101170396B CN 2006101503291 A CN2006101503291 A CN 2006101503291A CN 200610150329 A CN200610150329 A CN 200610150329A CN 101170396 B CN101170396 B CN 101170396B
- Authority
- CN
- China
- Prior art keywords
- pilot
- frequency design
- pilot frequency
- group
- transmitting antenna
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008054 signal transmission Effects 0.000 title claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 238000013461 design Methods 0.000 claims description 106
- 238000005259 measurement Methods 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 7
- 238000013459 approach Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a pilot signal transmission method of an enhanced multiple-transmission antenna system. Firstly, the invention divides N pilot patterns into M pilot pattern groups in accordance with the pilot pattern overhead and each pilot pattern group comprises N/M pilot patterns with the same overhead; correspondingly, the N transmission antennas are divided into M groups and each group comprises N/M transmission antennas; at the initial moment, a transmitter distributes a pilot pattern group for each group of transmission antenna and each transmission antenna inside each antenna group selects a pilot pattern inside the distributed pilot pattern group to transmit the pilot signal; the transmitter re-distributes the pilot pattern group for each transmission antenna group at every T, and each transmission antenna inside each antenna group selects a pilot pattern inside the distributed pilot pattern group to transmit the pilot signal. The invention solves the problems of the multiple-transmission antenna including unbalanced signal and complex scheduling, and also considers the pilot overhead and the system performance of the multiple-transmission antenna system.
Description
Technical field
The present invention relates to multi-transmitting antenna system, relate to pilot signal transmission method particularly based on the multiaerial system of orthogonal frequency division multiplexi.
Background technology
Wireless communication technology develops to the direction of broadband wireless access.And for the high power capacity of the high efficiency, two-forty and the system that realize wireless transmission, comprehensive utilization OFDM (OFDM) and multiple-input and multiple-output (MIMO) technology are the selections of following wireless communication technology.
Compare with the single transmit antenna, under the mimo system pilot-frequency expense of multi-transmitting antenna system and performance the compromise be one must not irrespective problem.For pilot-frequency expense and the systematic function of taking into account multi-transmitting antenna system, the pilot-frequency expense of different transmit antennas usually is different.
But the pilot signal that multiple transmit antennas sends different expenses has following drawback:
1. the signal quality of different transmit antennas is uneven.Because the pilot signal expense that different transmit antennas is sent is different; Receiver is to different (receiver is also more accurate to the channel estimating of the signal of the big transmitting antenna of pilot signal expense from the channel estimating quality of different transmit antennas;); Correspondingly, more remarkable from the difference of signal after demodulation of different transmit antennas, this link stability for mimo system, maximum capacity are very disadvantageous;
2. receiver is different to the quality of indicating from the channel quality of different transmit antennas, and this has increased the complexity that transmitter utilizes the channel quality indication to dispatch, and is unfavorable for the realization of system.
For the system that utilizes OFDM (OFDM) and multiple-input and multiple-output (MIMO) technology, a kind of pilot signal distribution method of many antennas is newly proposed, the influence that addresses the above problem is very important.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of pilot signal transmission method of multi-transmitting antenna system of enhancing, with the signal that has solved multiple transmit antennas uneven with the scheduling complicated problems.
For solving the problems of the technologies described above; The present invention provides a kind of pilot signal transmission method of multi-transmitting antenna system of enhancing; The quantity of said multiple transmit antennas is N, and each transmitting antenna is according to a kind of known pilot frequency design pilot signal transmitted, every kind of corresponding a kind of expense of pilot frequency design; The expense of total M kind pilot frequency design is different, and said method comprises the steps:
According to the expense of pilot frequency design, N pilot frequency design is divided into M pilot frequency design group, each pilot frequency design group comprises the identical N/M of an expense pilot frequency design; Accordingly, N transmitting antenna is divided into the M group, every group comprises N/M transmitting antenna;
At initial time, transmitter is that every group of transmitting antenna distributes a pilot frequency design group, and each transmitting antenna in each antenna sets is selected a pilot frequency design pilot signal transmitted in this pilot frequency design group that is assigned with for use;
Per interval T, transmitter are each transmitting antenna set of dispense pilot frequency design group again, and each transmitting antenna in each antenna sets is selected a pilot frequency design pilot signal transmitted in this pilot frequency design group that is assigned with for use.
Wherein, said transmitter is the step of each transmitting antenna set of dispense pilot frequency design group again, can comprise:
Per interval T, transmitter are pilot frequency design group different with the current pilot pattern groups of each transmitting antenna set of dispense again.
Wherein, said transmitter is the step of each transmitting antenna set of dispense pilot frequency design group again, can comprise:
Per interval T, transmitter is designated as pilot frequency design group of each transmitting antenna set of dispense according to the channel quality that receives.
Adopt method provided by the invention, under the situation that does not increase extra pilot-frequency expense, promptly effectively solved the uneven and scheduling complicated problems of signal of multiple transmit antennas, also take into account the pilot-frequency expense and the systematic function of multi-transmitting antenna system simultaneously.
Description of drawings
Fig. 1 is a kind of sketch map of multiaerial system pilot signal transmitted.
Fig. 2 is the sketch map (open loop approach) according to the multiaerial system pilot signal transmitted of embodiment of the invention proposition.
Fig. 3 is the flow chart (closed-loop fashion) according to a multiaerial system pilot signal transmitted of the embodiment of the invention.
Embodiment
The present invention is directed to N (N＞=2) system of transmit antennas and propose a kind of pilot signal transmission method, be applicable to the pilot signal expense condition of different that different transmit antennas is sent.For being without loss of generality, N transmitting antenna used antenna 1 respectively, antenna 2 ... With antenna N.Each transmitting antenna is according to a kind of known pilot frequency design pilot signal transmitted, and every kind of corresponding a kind of expense of pilot frequency design.The expense of total M kind pilot frequency design different mutually (N/M is an integer normally).The pilot sending method that the present invention proposes can be described as:
According to the expense of pilot frequency design, dividing N pilot frequency design is M pilot frequency design group, and each pilot frequency design group comprises N/M pilot frequency design, and the expense of these pilot frequency designs is all identical; Correspondingly, dividing N transmitting antenna is the M group, and every group comprises N/M transmitting antenna.
At initial time (t=0), transmitter is that every group of transmitting antenna distributes a pilot frequency design group.Each transmitting antenna in the antenna sets is selected a pilot frequency design pilot signal transmitted in the pilot frequency design group for use.
Per interval T (in the cycle that the T pilot frequency design distributes, it can be one or more transmission time interval), transmitter is each transmitting antenna set of dispense pilot frequency design group again.Each transmitting antenna is selected a pilot frequency design pilot signal transmitted in the pilot frequency design group for use.Transmitter can be each transmitting antenna set of dispense pilot frequency design group according to one of following dual mode:
Open loop approach: per interval T, transmitter are one of each transmitting antenna set of dispense and the different pilot frequency design group of pilot frequency design group at present again.Such as, establish certain antenna sets use at present pilot frequency design group m pilot signal transmitted (m=0,1,2 ... M-1), then at the next one constantly, transmitter distributes the pilot frequency design group: [(m+P) Mod M] is this antenna sets.Here P be one greater than 0 but less than the integer of M.
Closed-loop fashion: per interval T; Transmitter is designated as each transmitting antenna set of dispense one pilot frequency design group according to the channel quality that receives, and (receiver receives the pilot signal from pilot transmitter; Utilize this pilot signal to carry out channel quality measurement, send to transmitter to the channel quality indication then).Such as: transmitter can be the little pilot frequency design group of the good transmission antenna group assignment overhead of channel quality.
For ease of profound understanding the present invention, be example with the frame structure shown in the accompanying drawing 1 below, provide some and comprise embodiments of the invention.
The pilot signal that Fig. 1 has provided a kind of multiple transmit antennas based on OFDM technology is sent sketch map, and (frequency pilot sign that antenna 1 sends is in the drawings with there being the rectangle frame of horizontal line shade to represent; The frequency pilot sign that antenna 2 sends is in the drawings with there being the rectangle frame of vertical line shade to represent; The frequency pilot sign that antenna 3 sends is represented with the rectangle frame that right tiltedly line shade is arranged in the drawings; The frequency pilot sign that antenna 4 sends is represented with the rectangle frame that the oblique line in left side shade is arranged in the drawings).In this sketch map; A transmission time interval (TTI) comprises two sub-frame; Each subframe comprises 6 or 7 OFDM symbols (sketch map is 7 OFDM symbols); Frequency pilot sign is arranged in two OFDM symbols (first OFDM symbol and third from the bottom OFDM symbol are called first frequency pilot sign and second frequency pilot sign below respectively) of subframe.The pilot signal that antenna 1/2 sends is the twice of the pilot signal expense of antenna 3/4 transmission in expense.
This figure has also provided four kinds of pilot frequency designs simultaneously, and the rectangle frame that is provided with the horizontal line shade is represented pilot frequency design 1; There is the rectangle frame of vertical line shade to represent pilot frequency design 2; There is the rectangle frame of right tiltedly line shade to represent pilot frequency design 3; There is the rectangle frame of the oblique line in left side shade to represent pilot frequency design 4, can finds out that from this figure pilot frequency design 1 has identical expense with pilot frequency design 2; Pilot frequency design 3 has identical expense with pilot frequency design 4.And the time domain density of pilot frequency design 1/2 is the twice of the time domain density of pilot frequency design 3/4, and corresponding, the expense of pilot frequency design 1/2 also is 2 times of pilot frequency design 3/4 expense.
Use the method that the present invention proposes, according to the expense of pilot frequency design, 4 pilot frequency designs are divided into 2 pilot frequency design groups, and each pilot frequency design group comprises 2 pilot frequency designs, and the expense of these pilot frequency designs is all identical; Correspondingly, dividing 4 transmitting antennas is 2 groups, and every group comprises 2 transmitting antennas.For being without loss of generality, establishing transmitting antenna 1/2 is an antenna sets; Transmitting antenna 3/4 is an antenna sets.If the duration of pilot frequency design is a TTI, accompanying drawing 2 has provided the sketch map (open loop approach) of the multiaerial system pilot signal transmitted of the present invention's proposition, and wherein, the frequency pilot sign that antenna 1 sends is in the drawings with there being the rectangle frame of horizontal line shade to represent; The frequency pilot sign that antenna 2 sends is in the drawings with there being the rectangle frame of vertical line shade to represent; The frequency pilot sign that antenna 3 sends is represented with the rectangle frame that right tiltedly line shade is arranged in the drawings; The frequency pilot sign that antenna 4 sends is represented with the rectangle frame that the oblique line in left side shade is arranged in the drawings.Can find out that from this figure at odd number TTI, antenna sets 1 adopts pilot frequency design group 1 pilot signal transmitted, antenna sets 2 adopts pilot frequency design group 2 pilot signal transmitteds; At even number TTI, antenna sets 1 adopts pilot frequency design group 2 pilot signal transmitteds, and antenna sets 2 adopts pilot frequency design group 1 pilot signal transmitted.Need to prove, in this sketch map, all odd numbers (perhaps even number) TTI; The employing same pilot pattern pilot signal transmitted that transmitting antenna in the antenna sets is always fixing; In fact, this transmitting antenna also can adopt different pilot frequency design pilot signal transmitteds, as long as expense is identical.Both of these case is all contained by claim of the present invention.
Fig. 3 has provided the flow chart (closed-loop fashion) that comprises a multiaerial system pilot signal transmitted of the present invention:
Repeated execution of steps 303-306.
Claims (7)
1. the pilot signal transmission method of the multi-transmitting antenna system of an enhancing; The quantity of said multiple transmit antennas is N; Each transmitting antenna is according to a kind of known pilot frequency design pilot signal transmitted; Every kind of corresponding a kind of expense of pilot frequency design, the expense of total M kind pilot frequency design is different, and said method comprises the steps:
According to the expense of pilot frequency design, N pilot frequency design is divided into M pilot frequency design group, each pilot frequency design group comprises the identical N/M of an expense pilot frequency design; Accordingly, N transmitting antenna is divided into the M group, every group comprises N/M transmitting antenna;
At initial time, transmitter is that every group of transmitting antenna distributes a pilot frequency design group, and each transmitting antenna in each antenna sets is selected a pilot frequency design pilot signal transmitted in this pilot frequency design group that is assigned with for use;
Per interval T, transmitter are each transmitting antenna set of dispense pilot frequency design group again, and each transmitting antenna in each antenna sets is selected a pilot frequency design pilot signal transmitted in this pilot frequency design group that is assigned with for use;
Wherein, said time T is one or more transmission time intervals.
2. the method for claim 1, wherein said transmitter is the step of each transmitting antenna set of dispense pilot frequency design group again, comprising:
Per interval T, transmitter are pilot frequency design group different with the current pilot pattern groups of each transmitting antenna set of dispense again.
3. the method for claim 1, wherein said transmitter is the step of each transmitting antenna set of dispense pilot frequency design group again, comprising:
Per interval T, transmitter is designated as pilot frequency design group of each transmitting antenna set of dispense according to the channel quality that receives.
4. like claim 1,2 or 3 described methods, wherein, said time T is the pilot frequency design assignment period, comprises one or more transmission time intervals.
5. method as claimed in claim 2, wherein, said is the step of a pilot frequency design group different with the current pilot pattern groups of each transmitting antenna set of dispense, comprising:
If the current use pilot frequency design of certain antenna sets group m pilot signal transmitted then distributes constantly at the next one, transmitter comes pilot signal transmitted for this group antenna assignment pilot frequency design group [(m+p) Mod M], wherein, m=0,1,2 ... M-1; P be one greater than 0 but less than the integer of M.
6. method as claimed in claim 3, wherein, said transmitter is indicated through following steps receive channel quality:
Receiver receives the pilot signal from pilot transmitter, utilizes this pilot signal to carry out channel quality measurement, then the channel quality indication is sent to transmitter.
7. method as claimed in claim 3, wherein, said transmitter is designated as the step of a pilot frequency design group of each transmitting antenna set of dispense according to the channel quality that receives, and comprising:
Transmitter is the little pilot frequency design group of the good transmission antenna group assignment overhead of channel quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101503291A CN101170396B (en) | 2006-10-26 | 2006-10-26 | Pilot signal transmission method for enhanced multi-transmission antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101503291A CN101170396B (en) | 2006-10-26 | 2006-10-26 | Pilot signal transmission method for enhanced multi-transmission antenna system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101170396A CN101170396A (en) | 2008-04-30 |
| CN101170396B true CN101170396B (en) | 2012-06-06 |
Family
ID=39390878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101503291A Expired - Fee Related CN101170396B (en) | 2006-10-26 | 2006-10-26 | Pilot signal transmission method for enhanced multi-transmission antenna system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101170396B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400849B (en) * | 2017-02-04 | 2022-04-29 | 中兴通讯股份有限公司 | Information sending method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476270A (en) * | 2002-08-12 | 2004-02-18 | 华为技术有限公司 | Selection method of transmitting antenna in multiantenna communication environment |
| CN1787506A (en) * | 2004-12-09 | 2006-06-14 | 中兴通讯股份有限公司 | Method for guiding frequency distribution of orthogonal frequency division multiplex system and apparatus thereof |
-
2006
- 2006-10-26 CN CN2006101503291A patent/CN101170396B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476270A (en) * | 2002-08-12 | 2004-02-18 | 华为技术有限公司 | Selection method of transmitting antenna in multiantenna communication environment |
| CN1787506A (en) * | 2004-12-09 | 2006-06-14 | 中兴通讯股份有限公司 | Method for guiding frequency distribution of orthogonal frequency division multiplex system and apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101170396A (en) | 2008-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101695191B (en) | System and method for distributing measurement reference signal resource | |
| CN102122985B (en) | MU-MIMO (Multi-User Multi-Input Multi-Output) transmission method | |
| CN101371609B (en) | Localized and distributed transmission | |
| CN101505180B (en) | CSI reference signal bearing method and apparatus in long term evolution system | |
| CN104993911B (en) | For handling method, user equipment and the base station of channel state information reference signals | |
| CN103687042B (en) | The transmission method and system of a kind of Physical Downlink Shared Channel | |
| CN103107857B (en) | Sending method and sending device for improving physical downlink control channel | |
| CN101771444B (en) | Method for setting reference signals in multi-antenna system and base station | |
| CN110169002A (en) | The method and device thereof of reference signal are sent in wireless communication system | |
| CN104094663B (en) | Method and apparatus for resource allocation of downlink control channel in wireless communication system | |
| EP1863209A1 (en) | Channel quality reporting in an orthogonal frequency division multiplexing system | |
| CN102461001A (en) | Multi-user mimo transmissions in wireless communication systems | |
| CN101222260A (en) | Device and method for transmitting control signaling | |
| CN104823395A (en) | Method for receiving or transmitting downlink control signal in wireless communication system, and apparatus therefor | |
| CN105191189A (en) | Method for mitigating interference when changing use of dynamic resource in wireless communication system, and device therefor | |
| CN104380633A (en) | Method for forming resource block for search region in distribution-type downlink control channel in wireless communication system, and apparatus therefor | |
| CN101174866B (en) | Pilot signal sending method of multi-transmitting antenna system based on orthogonal frequency division multiplexing | |
| CN101677306B (en) | Method and device for configuring reference signals | |
| CN101166053B (en) | Pilot signal transmission method of multi-transmitting antenna system | |
| CN102158292B (en) | Channel measurement pilot frequency sending method and base station | |
| CN104113914A (en) | Physical multicast channel configuring, transmitting, and receiving method and system | |
| CN101826944A (en) | Method and device for multi-node cooperative transmission | |
| CN101635589B (en) | Pilot frequency processing method | |
| CN101753193B (en) | Method for dividing multi-user channel estimation and equipment thereof | |
| CN101184073A (en) | Orthogonal frequency division multiplexing based pilot signal transmitting method of multi-transmission antenna system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20191026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |