CN108540271A - A kind of Alamouti transmission methods, wireless communication system suitable for FBMC/OQAM - Google Patents
A kind of Alamouti transmission methods, wireless communication system suitable for FBMC/OQAM Download PDFInfo
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- CN108540271A CN108540271A CN201810258048.0A CN201810258048A CN108540271A CN 108540271 A CN108540271 A CN 108540271A CN 201810258048 A CN201810258048 A CN 201810258048A CN 108540271 A CN108540271 A CN 108540271A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0637—Properties of the code
- H04L1/0668—Orthogonal systems, e.g. using Alamouti codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/264—Pulse-shaped multi-carrier, i.e. not using rectangular window
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention belongs to wireless communication technology fields, a kind of Alamouti transmission methods, wireless communication system suitable for FBMC/OQAM is disclosed, the Alamouti transmission methods suitable for FBMC/OQAM are interfered using the blocky transmission of data come the included imaginary part of approximate counteracting FBMC/OQAM systems；By transmitting data in the enterprising row block shape of frequency domain, using the symmetry of block structure, the included imaginary part interference of FBMC systems is offset.Compared with prior art, the present invention can work normally under low time delay scene and time-selective channel and also have good performance under frequency-selective channel.The present invention using in the blocky transmission of frequency domain progress, demodulation due to not needing time delay, and system performance is better than traditional time domain bulk transmission plan under time-selective channel.
Description
Technical field
The invention belongs to wireless communication technology field more particularly to a kind of Alamouti transmission suitable for FBMC/OQAM
Method, wireless communication system.
Background technology
Currently, the prior art commonly used in the trade is such：As 4G is commercial on a large scale, the towards the year two thousand twenty and future
The R＆D work of five third-generation mobile communication technologies (5G) has become the hot spot of industry concern.It was compared to former mobile broadband service
Main 4G, 5G will not only provide the transmission rate of 10Gbit/s magnitudes, support Embb (enhancing mobile broadband) scene, will also support
Internet of things service with demanding specifications includes URLLC (the reliable low time delay of superelevation) business using Industry Control as representative
With with environmental monitoring be represent mMTC (communication of large-scale machines class) business.These business propose multi-transceiver technology new need
It asks.The multi-transceiver technology of present mainstream is OFDM technology, and core concept is to break a channel into multiple mutually orthogonal subchannels,
The stream compression of high-speed is changed to parallel low speed sub-data flow into, the signal bandwidth on sub-channels every in this way will be less than letter
The correlation bandwidth in road.Simultaneously in an ofdm system, each symbol needs to add cyclic prefix (CP) before sending, to ensure that son carries
Still can be orthogonal under multipath channel between wave, increase the ability of anti-multipath of system.The most key is some ofdm system
IFFT/FFT can be utilized to realize fast modulation and demodulation.OFDM is based on the above advantage, just so that its extensive use
In today's wireless communication systems, such as LTE, WiMax, Wlan, DVB-T, DAB etc..But possess the OFDM of many merits
Also there is its deficiency.The introducing of cyclic prefix reduces the efficiency of transmission of system, especially preferable in channel, long
CP can lead to the waste of running time-frequency resource.And under certain severe channels, when CP length is less than channel maximum multipath time delay, it is
System still remains intersymbol interference (ISI).Since transmitter and receiver relative motion can cause Doppler's frequency in realistic channels
It moves, the factors such as transmitter and receiver local crystal oscillator mismatch, the carrier frequency shift of system is all existing, and ofdm system
It is required that each subcarrier stringent synchronization, this has no small test to the estimating carrier frequencies of system and calibration.Ofdm system
Another drawback be that secondary lobe is larger, reduce perception accuracy of the system to frequency spectrum, and secondary lobe occupies more energy compared with conference
Amount.In order to make up the disadvantage mentioned above of OFDM, there is expert to propose to use multi-transceiver technology based on wave filter group.Due to FBMC systems
The ptototype filter with good Time-Frequency Localization characteristic has been used, the independence between subchannel has been ensure that, so not needing
Protection interval is provided using cyclic prefix, and its side lobe attenuation ratio OFDM is big, does not require each subcarrier stringent synchronization.Due to
The above advantage, FBMC technologies have become one of 5G, the candidate waveform of satellite communication.MIMO technology is realized more by mutiple antennas
Hair to be received, and in the case where not increasing frequency spectrum resource and antenna transmission power, can increase exponentially system channel capacity,
It is considered as the core technology of wireless communication.But since FBMC systems are only orthogonal in real number field rather than orthogonal in complex field,
Imaginary part existing for FBMC internal systems is caused to be interfered, this makes some be suitable for the MIMO technology of OFDM and can not directly apply
In FBMC systems.How Alamouti technologies are organically combined to have become and be worked as simplest MIMO technology with FBMC
The emphasis of preceding research.Wherein go to overcome the own interference of FBMC systems with CDMA technology, however due to needing a large amount of code word, limit
Its application is made；Thought is interfered using iteration elimination, however program complexity is higher.Blocky transmission in the time domain, the program
Good effect can be obtained in flat channel, however under time-selective channel or under low time delay scene, the program is all
It can not directly apply.
In conclusion problem of the existing technology is：CDMA technology goes to overcome the own interference of FBMC systems, due to needing
A large amount of code word is wanted, its application is limited；Interfere thought, complexity higher using iteration elimination.Blocky transmission in the time domain, should
Scheme can obtain good effect in flat channel, however under time-selective channel or under low time delay scene, all without
Method is directly applied.
Solve the difficulty and meaning of above-mentioned technical problem：Since first two scheme complexity is higher, time domain bulk transmission side
Case can not work normally under time-selective channel, this all affects their practical application.So proposing a kind of low complexity
It is meaningful to spend the technical solution that can be worked normally under time-selective channel.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of Alamouti transmission suitable for FBMC/OQAM
Method, wireless communication system.
The invention is realized in this way a kind of Alamouti transmission methods suitable for FBMC/OQAM, described to be suitable for
The Alamouti transmission methods of FBMC/OQAM.Entire frequency domain is divided into multiple bulks respectively using two antennas in transmitting terminal
Structure has inside each block and is divided into two sub-blocks.The interference between sub-block needs insertion 0 in order to prevent.One wherein in antenna 1
The block structure of a block structure and corresponding antenna 2 collectively forms an Alamouti block.In order to offset FBMC internal systems
The phase rotation coefficient needs of intrinsic interference, left and right sub-block take conjugation.
Further, the Alamouti transmission methods suitable for FBMC/OQAM include the following steps：
Step 1, transmitting terminal first carry out QPSK constellation mappings and serial to parallel conversion to data stream, carry out OQAM pretreatments, will answer
Number signal is converted to two real signals；
Step 2, NcA subcarrier is divided into Nc/NFA block structure, each block size are NF, each block structure inside is again
It is N to be divided into the size of left and right twoFThe sub-block of/2-1 is inserted into 0 between sub-block；
Step 3, the data that antenna 1 transmits are expressed as ak,n, antenna 2 transmit data be expressed as bk,n, respectively to two days
Data on line carry out FBMC modulation；
Step 4, obtaining reception signal is：
R (m)=hasa(m)+hbsb(m)+n(m)；
Wherein ha, hbFor two channels, n (m) is that power spectral density is N0/ 2 additivity ambient noise；
Step 5 carries out FBMC demodulation, obtains the reception signal in time frequency point (k, n)：
Step 6 is demodulated to obtain using classical Alamouti demodulation schemes：
Step 7 can be offset the characteristic of self-interference by FBMC filters in the transmission of frequency domain bulk, rightIt removes on both sides
WithIt obtains：
Step 8, to xk,n, yk,nOQAM demodulation is carried out, real number is become into plural number；It carries out again and goes here and there conversion and QPSK constellations
Demapping recovers original signal.
Further, the step 3 progress FBMC modulates to obtain
Wherein g (m) is the ptototype filter of PHYDYAS project team design, θk,n=j(k+n), as 1≤k≤NFIt is left when/2-1
Half sub-block θk,nMeet following condition：
At this point, right half sub-blockIt need to meet and half sub-block θ of a left sidek,nConjugate condition：
Further, the step 5 proceeds as follows the reception signal of time frequency point (k, n)：
Expression takes the real part of plural z.
Another object of the present invention is to provide the Alamouti transmission methods for being suitable for FBMC/OQAM described in a kind of application
Wireless communication system.
In conclusion advantages of the present invention and good effect are：Compared with prior art, the present invention can be in low time delay scene
Also there is good performance with normal work under time-selective channel and under frequency-selective channel.The present invention is due to using
Frequency domain carries out blocky transmission, and when demodulation does not need time delay, and system performance is better than traditional time domain under time-selective channel
Blocky transmission plan.
Traditional time domain bulk is transmitted when Doppler is larger, and performance declines obviously, and this method performance is almost kept not
Become.When being shown in multidiameter delay increase, this programme performance only declines a bit, is still able to normal communication.
Description of the drawings
Fig. 1 is area block transmission structure schematic diagram provided in an embodiment of the present invention；
Fig. 2 is classics Alamouti transmission structure schematic diagrames provided in an embodiment of the present invention；
Fig. 3 is Alamouti-FBMC system block diagrams provided in an embodiment of the present invention；
Fig. 4 is the analogous diagram provided in an embodiment of the present invention under multipath channel；
Fig. 5 is provided in an embodiment of the present invention under Doppler's channel, the transmission of frequency domain bulk and time domain bulk transmission performance
Comparison schematic diagram；
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The present invention, using the symmetry of block structure, can be balanced out by being transmitted in the enterprising row block shape of frequency domain data
The included imaginary part interference of FBMC systems.The present invention can reduce FBMC relative to traditional time domain bulk transmission Alamouti schemes
Time Delay of Systems, and performance is far superior to time domain bulk transmission plan under time-selective channel.
Alamouti transmission methods provided in an embodiment of the present invention suitable for FBMC/OQAM include the following steps：
(1) transmitting terminal first carries out QPSK constellation mappings and serial to parallel conversion to data stream, then carries out OQAM pretreatments, will answer
Number signal is converted to two real signals.
(2) NcA subcarrier is divided intoA block structure, each block size are NF, be divided into inside each block structure for
The size of left and right two is NFThe sub-block of/2-1 is inserted into 0 between sub-block.Fig. 1 is an Alamouti area block schematic diagram.
Wherein k sub-carrier numbers, n indicate symbolic number.
(3) data that antenna 1 transmits are expressed as ak,n, antenna 2 transmit data be expressed as bk,n.Respectively on two antennas
Data carry out FBMC modulation, can obtain：
Wherein g (m) is the ptototype filter of PHYDYAS project team design, θk,n=j(k+n), as 1≤k≤NFIt is left when/2-1
Half sub-block θk,nMeet following condition：
At this point, right half sub-blockIt need to meet and half sub-block θ of a left sidek,nConjugate condition：
(4) as shown in Fig. 2, reception signal is：
R (m)=hasa(m)+hbsb(m)+n(m)；
Wherein ha, hbFor two channels, it is assumed that be known.N (t) is that power spectral density is N0/ 2 additivity ambient noise.
(5) FBMC demodulation is carried out, the reception signal in time frequency point (k, n) is obtained；
(6) it is demodulated to obtain with classics Alamouti demodulation schemes：
Expression takes the real part of plural z.
(7) utilize FBMC filters that can offset the characteristic of self-interference in the transmission of frequency domain bulk, it is rightBoth sides divided byIt obtains：
(7) to xk,n, yk,nOQAM demodulation is carried out, real number is become into plural number.It carries out again and goes here and there conversion and QPSK constellation solutions are reflected
It penetrates, finally recovers original signal.
Use QPSK constellation mappings, subcarrier spacing that 15Hz, sub-carrier number is taken to take 1024, adopt in embodiments of the present invention
Number of path with the ptototype filter that ptototype filter is PHYDYAS Project designs, overlap factor K=4, multipath channel is 5, road
Diameter time delay is 0~τmaxIt is uniformly distributed, wherein τmaxValue range is 10-8~10-6Exponential damping is obeyed in s, power time delay distribution.
Time-selective channel uses Jakes models, and Doppler is from 0 to 150Hz.
It can be obtained by Fig. 4, the present invention is almost the same with conventional method performance when maximum multipath time delay is smaller, works as maximum multipath
When time delay increases, by reducing frequency domain block size, the present invention can work normally.
As shown in Figure 5, under time-selective channel, performance is basically unchanged the present invention, and traditional time domain bulk transmission
Performance declines apparent.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (5)
1. a kind of Alamouti transmission methods suitable for FBMC/OQAM, which is characterized in that described suitable for FBMC/OQAM's
Alamouti transmission methods are interfered using the blocky transmission of data come the included imaginary part of approximate counteracting FBMC/OQAM systems；Pass through
By data in the enterprising row block shape transmission of frequency domain, left and right sub-block phase rotation coefficient takes conjugation, using the symmetry of block structure, supports
The included imaginary part interference of the FBMC systems that disappear.
2. being suitable for the Alamouti transmission methods of FBMC/OQAM as described in claim 1, which is characterized in that described to be applicable in
Include the following steps in the Alamouti transmission methods of FBMC/OQAM：
Step 1, transmitting terminal first carry out QPSK constellation mappings and serial to parallel conversion to data stream, carry out OQAM pretreatments, and plural number is believed
Number be converted to two real signals；
Step 2, NcA subcarrier is divided into Nc/NFA block structure, each block size are NF, be divided into inside each block structure for
The size of left and right two is NFThe sub-block of/2-1 is inserted into 0 between sub-block；
Step 3, the data that antenna 1 transmits are expressed as ak,n, antenna 2 transmit data be expressed as bk,n, respectively on two antennas
Data carry out FBMC modulation；
Step 4, obtaining reception signal is：
R (m)=hasa(m)+hbsb(m)+n(m)；
Wherein ha, hbFor two channels, n (m) is that power spectral density is N0/ 2 additivity ambient noise；
Step 5 carries out FBMC demodulation, obtains the reception signal in time frequency point (k, n)：
Step 6 is demodulated to obtain using classical Alamouti demodulation schemes：
Step 7 can be offset the characteristic of self-interference by FBMC filters in the transmission of frequency domain bulk, rightBoth sides divided by (| ha
|2+|hb|2) obtain：
Step 8, to xk,n, yk,nOQAM demodulation is carried out, real number is become into plural number；It carries out again and goes here and there conversion and QPSK constellation solutions are reflected
It penetrates, recovers original signal.
3. being suitable for the Alamouti transmission methods of FBMC/OQAM as claimed in claim 2, which is characterized in that the step
Three progress FBMC modulate to obtain
Wherein g (m) is the ptototype filter of PHYDYAS project team design, θk,n=j(k+n), as 1≤k≤NFWhen/2-1, left half son
Block θk,nMeet following condition：
At this point, right half sub-blockIt need to meet and half sub-block θ of a left sidek,nConjugate condition：
4. being suitable for the Alamouti transmission methods of FBMC/OQAM as claimed in claim 2, which is characterized in that the step
The reception signal of five pairs of time frequency points (k, n) proceeds as follows：
Expression takes the real part of plural z.
5. a kind of using the wireless of the Alamouti transmission methods for being suitable for FBMC/OQAM described in Claims 1 to 4 any one
Communication system.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474856A (en) * | 2019-08-08 | 2019-11-19 | 华中科技大学 | It is a kind of based on the channel estimation methods for completely interfering with elimination |
| CN110650000A (en) * | 2019-09-29 | 2020-01-03 | 华中科技大学 | Signal detection and recovery method |
| CN111711593A (en) * | 2020-06-22 | 2020-09-25 | 西安电子科技大学 | OFDM/OQAM-based modulation method for visible light communication system |
| CN112491756A (en) * | 2020-11-23 | 2021-03-12 | 西安电子科技大学 | RLS channel estimation method for joint channel equalization in FBMC system |
| CN113628082A (en) * | 2021-07-07 | 2021-11-09 | 哈尔滨海关技术中心 | Cattle regionalization and inbound and outbound management method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170302408A1 (en) * | 2016-04-13 | 2017-10-19 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Transmitter for fbmc system with block-alamouti type space-time coding |
| CN107276726A (en) * | 2017-05-16 | 2017-10-20 | 西安交通大学 | A kind of Massive MIMO FBMC beam space time coding downlink transmission methods |
| CN107690784A (en) * | 2015-04-01 | 2018-02-13 | 株式会社Ntt都科摩 | Transmission diversity from the orthogonal design for FBMC/OQAM |
-
2018
- 2018-03-27 CN CN201810258048.0A patent/CN108540271A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107690784A (en) * | 2015-04-01 | 2018-02-13 | 株式会社Ntt都科摩 | Transmission diversity from the orthogonal design for FBMC/OQAM |
| US20170302408A1 (en) * | 2016-04-13 | 2017-10-19 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Transmitter for fbmc system with block-alamouti type space-time coding |
| CN107276726A (en) * | 2017-05-16 | 2017-10-20 | 西安交通大学 | A kind of Massive MIMO FBMC beam space time coding downlink transmission methods |
Non-Patent Citations (2)
| Title |
|---|
| DONGJUN NA AND KWONHUE CHOI: "Intrinsic ICI-Free Alamouti Coded FBMC", 《IEEE COMMUNICATIONS LETTERS》 * |
| 崔文佳: "OQAM/FBMC通信系统中分散式导频的设计与信道估计研究", 《中国优秀硕士学位论文全文数据库信息科技辑（月刊）2018年第01期》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474856A (en) * | 2019-08-08 | 2019-11-19 | 华中科技大学 | It is a kind of based on the channel estimation methods for completely interfering with elimination |
| CN110650000A (en) * | 2019-09-29 | 2020-01-03 | 华中科技大学 | Signal detection and recovery method |
| CN111711593A (en) * | 2020-06-22 | 2020-09-25 | 西安电子科技大学 | OFDM/OQAM-based modulation method for visible light communication system |
| CN112491756A (en) * | 2020-11-23 | 2021-03-12 | 西安电子科技大学 | RLS channel estimation method for joint channel equalization in FBMC system |
| CN113628082A (en) * | 2021-07-07 | 2021-11-09 | 哈尔滨海关技术中心 | Cattle regionalization and inbound and outbound management method and system |
| CN113628082B (en) * | 2021-07-07 | 2023-08-15 | 哈尔滨海关技术中心 | Cattle regional and entry and exit management method and system |
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Application publication date: 20180914 |