CN107395257A - One kind is based on LTE system and its signal transmitting method - Google Patents
One kind is based on LTE system and its signal transmitting method Download PDFInfo
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- CN107395257A CN107395257A CN201710810640.2A CN201710810640A CN107395257A CN 107395257 A CN107395257 A CN 107395257A CN 201710810640 A CN201710810640 A CN 201710810640A CN 107395257 A CN107395257 A CN 107395257A
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0426—Power distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
-
- 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
- H04L25/0204—Channel estimation of multiple channels
-
- 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
-
- 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
- H04L5/0058—Allocation criteria
- H04L5/0066—Requirements on out-of-channel emissions
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
- H04W52/325—Power control of control or pilot channels
-
- 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
- H04L25/0212—Channel estimation of impulse response
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The signal transmitting method based on LTE system of the present invention, on the basis of the communication terminal for considering more communication terminal LTE system link evaluated errors and more communication terminal environment is dispatched, the pilot tone iterative estimate of LTE links and the most suitable matching relationship of resource distribution are derived according to more communication terminal LTE capacity, and using the pilot signal for being best suitable for pilot signal power transmitting and base station transmitting antenna number equal amount and carry out data transmitting, the accuracy of link estimation is optimized, improves the throughput performance of LTE links.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of signal transmitting method based on LTE system.
Background technology
LTE (Long Term Evolution, Long Term Evolution) is by 3GPP (The 3rd Generation
Partnership Project, third generation partner program) UMTS (the Universal Mobile that organize to set up
Telecommunications System, UMTS) technical standard Long Term Evolution, exist in December, 2004
Formally set up the project and start in the TSGRAN#26 meetings of 3GPP Toronto.LTE system introduces OFDM (Orthogonal
Frequency Division Multiplexing, OFDM) and MIMO (Multi-Input＆Multi-Output,
Multiple-input and multiple-output) etc. crucial lift-off technology, significantly increasing spectrum efficiency and data transmission rate, (20M bandwidth 2X2MIMO exists
In the case of 64QAM, theoretical descending emission maximum speed be 201Mbps, removes and 140Mbps is about after signaling consumption, but according to
Actual networking and terminal capability limitation, it is considered that downlink peak rates 100Mbps, upper behavior 50Mbps), and support more
Kind bandwidth allocation：1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz and 20MHz etc., and support global main flow 2G/3G frequency ranges and one
Newly-increased frequency range a bit, thus frequency spectrum distribution is more flexible, power system capacity and covering are also obviously improved.The LTE system network architecture is more
Flattening simplify, reduce network node and system complexity, so as to reduce Time Delay of Systems, also reduce network design and
Maintenance cost.LTE system is supported to interoperate with other 3GPP systems.LTE system has two kinds of standards：FDD-LTE and TDD-LTE,
I.e. FDD LTE system and time division duplex LTE system, the main distinction of the two technology are in the physical layer of air interface
(as frame structure, time-division design, synchronous etc.).FDD-LTE systems eat dishes without rice or wine up-downgoing transmitting using a pair symmetrical UHF band receptions and
Launch data, and TDD-LTE system up-downgoing is then launched using identical frequency range on different time slots, relative to FDD duplexs
Mode, TDD have the higher availability of frequency spectrum.
But in more communication terminal LTE systems, except link evaluated error etc. and single communication terminal LTE system are deposited jointly
The problem of outside, also existing multiple terminals diversity, terminal room interference and the multiple terminals scheduling of more communication terminal LTE systems in itself
The problems such as, this cause from single communication terminal LTE system analyze in obtained pilot tone iterative estimate and resource distribution it is most suitable
Close matching relationship and be not particularly suited for more communication terminal LTE systems, so the pilot tone for more communication terminal LTE system broadcasting links
Iterative estimate and the most suitable matching relationship of resource distribution are to be worth research.
The content of the invention
The purpose of the present invention is achieved through the following technical solutions.
According to the embodiment of the present invention, it is proposed that a kind of signal transmitting method based on LTE system, methods described include
Step：
S1, under the conditions of link Rayleigh fading, preset in a packet that at most transmitting symbolic number T are more than the hairs of base station
Antenna number M is penetrated, base station determines to be best suitable for pilot signal according to pilot tone iterative estimate and the most suitable matching relationship of resource distribution
PowerLaunch M pilot signal to the communication terminal of only one reception antenna.
S2, communication terminal, which utilize, enters line link estimation to the receiving matrix of pilot signal.
Communication terminal number K is not less than base station transmitting antenna number M in S3, predetermined system, and base station returns according to communication terminal
The communication termination-link information returned, launch the selection of communication terminal group.
S4, T-M data are launched with system data power P d for M selected transmitting communication terminal in notebook data bag
Symbol.
According to the embodiment of the present invention, the S1 according to the most suitable matching of pilot tone iterative estimate and resource distribution close
System determines that being best suitable for pilot signal power includes：
When at most transmitting symbolic number T meets M ＜ T ＜ 2M-1 in a packet, pilot signal power is best suitable for
In formula, P is to count uniform emission power, procedure parameter
Launch pilot signal
According to the embodiment of the present invention, the S1 according to the most suitable matching of pilot tone iterative estimate and resource distribution close
System determines that being best suitable for pilot signal power includes：
When at most transmitting symbolic number T meets T=2M-1 in a packet, pilot signal power is best suitable for
In formula, P is to count uniform emission power, procedure parameter
Launch pilot signal
According to the embodiment of the present invention, the S1 according to the most suitable matching of pilot tone iterative estimate and resource distribution close
System determines that being best suitable for pilot signal power includes：
When at most transmitting symbolic number T meets T ＞ 2M in a packet, pilot signal power is best suitable for
In formula, P is to count uniform emission power, procedure parameter
Launch pilot signal
According to the embodiment of the present invention, the communication terminal of the S2 utilizes enters line link to the receiving matrix of pilot signal
Estimation specifically includes：
If communication terminal number is K in system, any communication terminal k therein link shock response is hk=[hk1,
hk2..., hkM], white Gaussian noise nk=[nk1, nk2..., nkM], the receiving matrix for pilot signal is：
It is communication terminal k link informations to obtain link estimated result：
And return it into base station.
According to the embodiment of the present invention, the communication termination-link that the base station of the S3 returns according to communication terminal is believed
Breath, launch the selection of communication terminal group, specifically include：
S31, initialization wait communication terminal group Γ 1={ 1 ..., K }, select first transmitting communication terminal
Transmitting communication terminal identification number i=2 is set；
S32, adjustment wait communication terminal group,
Wherein ε=0.4,
Represent the link information of n-th of transmitting communication terminal；
I-th S33, selection of transmitting communication terminal
Adjustment transmitting communication terminal identification number i=i+1；If i ＜ M, step S32 is performed；
S34, the transmitting communication terminal group finally determined are { π (1) ..., π (M) }, the transmitting communication terminal number selected
It is equal with base station transmitting antenna number M；
According to the embodiment of the present invention, the system data power of the S4
The signal transmitting method based on LTE system of the present invention, missed considering more communication terminal LTE system link estimations
On the basis of the communication terminal scheduling of poor and more communication terminal environment, LTE links are derived according to more communication terminal LTE capacity
Pilot tone iterative estimate and the most suitable matching relationship of resource distribution, and sent out using pilot signal power transmitting is best suitable for base station
Penetrate the pilot signal of antenna number equal amount and carry out data transmitting, optimize the accuracy of link estimation, improve LTE links
Throughput performance.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Accompanying drawing 1 shows the signal transmitting method flow chart based on LTE system according to embodiment of the present invention.
Embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in accompanying drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.Conversely, there is provided these embodiments are to be able to be best understood from the disclosure, and can be by this public affairs
The scope opened completely is communicated to those skilled in the art.
According to the embodiment of the present invention, it is proposed that a kind of signal transmitting method based on LTE system, as shown in Figure 1,
Methods described includes step：
S1, under the conditions of link Rayleigh fading, preset in a packet that at most transmitting symbolic number T are more than the hairs of base station
Antenna number M is penetrated, base station determines to be best suitable for pilot signal according to pilot tone iterative estimate and the most suitable matching relationship of resource distribution
PowerLaunch M pilot signal to the communication terminal of only one reception antenna.
It is described to determine to be best suitable for pilot signal power according to pilot tone iterative estimate and the most suitable matching relationship of resource distribution
Including：
When at most transmitting symbolic number T meets M ＜ T ＜ 2M-1 in a packet, pilot signal power is best suitable for
In formula, P is to count uniform emission power, procedure parameter
Launch pilot signal
When at most transmitting symbolic number T meets T=2M-1 in a packet, pilot signal power is best suitable for
In formula, P is to count uniform emission power, procedure parameter
Launch pilot signal
When at most transmitting symbolic number T meets T ＞ 2M in a packet, pilot signal power is best suitable for
In formula, P is to count uniform emission power, procedure parameter
Launch pilot signal
S2, communication terminal, which utilize, enters line link estimation to the receiving matrix of pilot signal：
If communication terminal number is K in system, any communication terminal k therein link shock response is hk=[hk1,
hk2..., hkM], white Gaussian noise nk=[nk1, nk2..., nkM], the receiving matrix for pilot signal is：
It is communication terminal k link informations to obtain link estimated result：
And return it into base station；
Communication terminal number K is not less than base station transmitting antenna number M in S3, predetermined system, and base station returns according to communication terminal
The communication termination-link information returned, launch the selection of communication terminal group, specifically include step：
S31, initialization wait communication terminal group Γ 1={ 1 ..., K }, select first transmitting communication terminal
Transmitting communication terminal identification number i=2 is set；
S32, adjustment wait communication terminal group,
Wherein ε=0.4,
Represent the link information of n-th of transmitting communication terminal；
I-th S33, selection of transmitting communication terminal
Adjustment transmitting communication terminal identification number i=i+1；If i ＜ M, step S32 is performed；
S34, the transmitting communication terminal group finally determined are { π (1) ..., π (M) }, the transmitting communication terminal number selected
It is equal with base station transmitting antenna number M；
S4, T-M data are launched with system data power P d for M selected transmitting communication terminal in notebook data bag
Symbol, the system data power
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should the protection model with claim
Enclose and be defined.
Claims (3)
1. one kind is based on LTE system, the signal transmitting method of the system, including step：
S1, under the conditions of link Rayleigh fading, preset in a packet that at most transmitting symbolic number T are more than the transmitting days of base station
Line number M, base station determine to be best suitable for pilot signal power according to pilot tone iterative estimate and the most suitable matching relationship of resource distributionLaunch M pilot signal to the communication terminal of only one reception antenna.
S2, communication terminal, which utilize, enters line link estimation to the receiving matrix of pilot signal.
Communication terminal number K is not less than base station transmitting antenna number M in S3, predetermined system, and base station returns according to communication terminal
Communication termination-link information, launch the selection of communication terminal group.
S4, in notebook data bag for M selected transmitting communication terminal with system data power PdLaunch T-M data symbol；
The S1's determines to be best suitable for pilot signal power according to pilot tone iterative estimate and the most suitable matching relationship of resource distribution
Including：
When at most transmitting symbolic number T meets T=2M-1 in a packet, pilot signal power is best suitable for
In formula, P is to count uniform emission power, procedure parameter
Launch pilot signal
2. the method as described in claim 1, the communication terminal of the S2 utilizes enters line link to the receiving matrix of pilot signal
Estimation specifically includes：
If communication terminal number is K in system, any communication terminal k therein link shock response is hk=[hk1, hk2...,
hkM], white Gaussian noise nk=[nk1, nk2..., nkM], the receiving matrix for pilot signal is：
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<mo>-</mo>
<mn>1</mn>
</mrow>
<mo>}</mo>
</mrow>
<mo>,</mo>
</mrow>
Wherein ε=0.4,Represent the link information of n-th of transmitting communication terminal；
I-th S33, selection of transmitting communication terminal
Adjustment transmitting communication terminal identification number i=i+1；If i ＜ M, step S32 is performed；
S34, the transmitting communication terminal group finally determined are { π (1) ..., π (M) }, the transmitting communication terminal number and base selected
Platform transmitting antenna number M is equal.
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| CN101394213B (en) * | 2007-09-19 | 2013-05-08 | 中兴通讯股份有限公司 | Multi-antenna communication method for time division duplexing mode frequency division multiplexing system |
| CN102300299B (en) * | 2010-06-24 | 2014-04-02 | 华为技术有限公司 | Method and equipment for sending pilot signals |
| CN102158459B (en) * | 2011-05-13 | 2013-08-07 | 清华大学 | OFDM (Orthogonal Frequency Division Multiplexing) block transmission method based on time-frequency two-dimension training information |
| CN102271026B (en) * | 2011-07-27 | 2013-11-27 | 东南大学 | Closed-loop self-adaptive transmission method used for uplink of advanced long-term evolution system |
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| CN107846271B (en) | 2021-02-26 |
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| CN104539566B (en) | 2017-12-15 |
| CN107846271A (en) | 2018-03-27 |
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