CN103236875A - MISO (multiple input single output) transmit diversity device and method based on single-carrier - Google Patents
MISO (multiple input single output) transmit diversity device and method based on single-carrier Download PDFInfo
- Publication number
- CN103236875A CN103236875A CN2013101275223A CN201310127522A CN103236875A CN 103236875 A CN103236875 A CN 103236875A CN 2013101275223 A CN2013101275223 A CN 2013101275223A CN 201310127522 A CN201310127522 A CN 201310127522A CN 103236875 A CN103236875 A CN 103236875A
- Authority
- CN
- China
- Prior art keywords
- link
- data
- module
- frequency domain
- 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.)
- Pending
Links
Images
Landscapes
- Radio Transmission System (AREA)
Abstract
The invention provides an MISO (multiple input single output) transmit diversity device based on single-carrier. The transmit diversity device comprises a transmission module, a link module, a transmitting module and a receiving module. The transmission module is connected with the link module which is connected with the receiving module through the transmitting module. The link module includes a first link and a second link. The first link is a direct link and is used for guaranteeing full compatibility of a SISO (single input single output) mode. The second link is a modified Almouti space-frequency coding link. Meanwhile, the invention provides an MISO (multiple input single output) transmit diversity method based on single-carrier. By the aid of the transmit diversity device and method, the SISO mode backward compatibility can be realized effectively, and capacity requirements of high speed, high transmission rate and high reliability are met; meanwhile, spatial diversity gain is realized, communication reliability and speed rate are improved, and communication capacity and experience are optimized; and the transmit diversity method of encoding and decoding is simple and obvious in effect, and has strong application prospect in future application.
Description
Technical field
The present invention relates to wireless communication technology field, specifically is a kind of MISO transmission diversity apparatus and emission diversity method thereof based on single carrier.
Background technology
Wireless communication field makes rapid progress, and various new technologies emerge in an endless stream.Between various technology also in constantly substituting.Single-carrier technology is all being brought into play the effect of can not ignore as one of present topmost a kind of modulator approach in various application.
Compare with multicarrier, single-carrier system requires much lower with respect to ofdm system to frequency shift (FS) and phase noise.For the communication system of the point-to-multipoint that happens suddenly, the modulation system of single carrier can make frequency and time synchronized design become simpler, has improved the stability of system simultaneously.Simultaneously, single carrier has been avoided the very big problem of the ratio (PAPR) of the maximum instantaneous electrical power when each phase place is identical of multicarrier system and average electrical power, can adopt more economical power amplifier efficiently like this in design, technology is more ripe, and the stability of system is higher.Thereby all used single carrier communication at present a lot of application.For example present railway video communication system and China Digital TV single carrier standard etc.
Single export technique (the MISO of many inputs, Multiple Input Single Output), by introducing many transmitting antennas in communication system, many parallel transmission channels have been set up at the dual-mode antenna two ends, utilize the parallel transmission data of these channels, effectively having promoted capacity and the availability of frequency spectrum of system, is to have breakthrough technology in the new generation of wireless communication system.
In traditional MISO transmit diversity based on the Alamouti coding, the signal of two transmitting antennas all will comprise coding and non-coded data, not straight-through link, this directly caused with the SISO pattern under incompatibility.Yet, in most of first generation communication and broadcast system, be mainly the pattern based on SISO.If new technology is used MISO, but can not be well compatible with SISO, in the popularization process, can bring bigger problem.
Consider above-mentioned two problems, have compatible MISO transmit diversity mode in the time of based on single carrier mode very strong application is arranged, much be similar to the new technology that needs in the railway video communication development just.
Summary of the invention
At defective of the prior art, the purpose of this invention is to provide a kind of MISO transmission diversity apparatus and emission diversity method thereof based on single carrier.The present invention uses Modified Alamouti (MA) space-frequency coding technology to realize transmit diversity under single-carrier modulated.
The present invention is achieved by the following technical solutions.
A kind of MISO transmission diversity apparatus based on single carrier comprises delivery module, link module, transmitter module and receiver module, and described delivery module is connected with link module, and described link module is connected with receiver module by transmitter module;
Described link module comprises first link and second link, and described first link is straight-through link, and described second link is modified Almouti space-frequency coding link;
Described transmitter module comprises first antenna and second antenna, and described first antenna is connected with first link, and described second antenna is connected with second link.
A kind of emission diversity method of above-mentioned MISO transmission diversity apparatus based on single carrier may further comprise the steps:
The sequence data to be sent that step 2, first link receive does not need the processing of encoding, and directly first antenna by transmitter module is emitted to receiver module; Simultaneously,
The sequence data to be sent that second link receives is that unit carries out the FFT conversion with the frame, obtains corresponding frequency domain frame sequence after the conversion in the frequency domain;
Step 3 is carried out Modified Alamouti (MA) coding to above-mentioned frequency domain frame sequence, and the back data of will encode are then carried out the IFFT conversion, and after data transformed to the time domain sequences data after encoding, second antenna by transmitter module was emitted to receiver module;
Step 4, receiver module merges the two link sequences data that it receives, and the data after will merging are then carried out the FFT conversion, and the data after the merging transform to carries out Modified Alamouti decoding in the frequency domain, obtain former transmission frequency domain information;
Step 5 is carried out the IFFT conversion with above-mentioned former transmission frequency domain information, obtains time domain data, namely obtains final former transmission information.
Preferably, described step 4 is specially, and direct addition was sued for peace after receiver module received two link sequences data, realized two paths of data is merged; Data after will merging are then carried out the FFT conversion, the data after merging are transformed to carry out Modified Alamouti decoding in the frequency domain; During decoding, the data after being combined divide into groups to carry out Modified Alamouti decoding in twos, and decoding obtains corresponding former transmission frequency domain information.
Preferably, the sequence data to be sent of described first link is expressed as: Tr1=Data;
The time domain sequences data of described second link are expressed as: Tr2=IFFT (MA (FFT (Data))).
Preferably, described final former transmission information D e_Data is expressed as:
Re=Re1+Re2;
De_Data=IFFT(DMA(FFT(Re)));
Wherein, Re1 is the sequence data of first antenna emission, and Re2 is the sequence data of second antenna emission, and Re is the two link sequences data that receiver module receives.
MISO transmission diversity apparatus and emission diversity method thereof based on single carrier provided by the invention, be used in single-carrier technology, use two antennas at transmitter module, multiplex technique when using sky simultaneously adopts modified Almouti (MA) space-frequency coding to realize transmit diversity.The encoded back of the burst of delivery module is sent to two adjacent links respectively by two links, its Shen first link is straight-through link, namely do not do any coding handles transmitting, to guarantee the complete compatibility of the pattern of receiving with SISO (single input single output, i.e. single-input single-output system) single-shot list; Data in second link are used Modified Alamouti (MA) space-frequency coding, send out after the data of sending into are divided into groups to encode in twos again.And at receiver module, the reception antenna of receiver module, obtains original transmission data in the hope of decoding, and obtains diversity gain simultaneously again by certain rule decoding the two link sequences data that the receive merging of suing for peace.
The present invention is backward compatibility SISO mode effectively, can reach the performance requirement of high speed high transmission rates high reliability again.Simultaneously, the implementation space diversity gain improves communication reliability and speed, improves communication performance and experience.Coding and decoding method of the present invention is simple, and effect is remarkable, in using future very strong application prospect is arranged.
Description of drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is overall structure schematic diagram of the present invention;
Fig. 2 moves the reception schematic diagram for the present invention.
Embodiment
Below embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, has provided detailed execution mode and concrete operating process.Should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to the protection range of wood invention.
Please consult Fig. 1 to Fig. 2 simultaneously, present embodiment provides a kind of MISO transmission diversity apparatus based on single carrier, comprise delivery module, link module, transmitter module and receiver module, described delivery module is connected with link module, and described link module is connected with receiver module by transmitter module;
Further, described link module comprises first link and second link, and described first link is straight-through link, and described second link is modified Almouti space-frequency coding link;
Further, described transmitter module comprises first antenna and second antenna, and described first antenna is connected with first link, and described second antenna is connected with second link.
The MISO transmission diversity apparatus based on single carrier that present embodiment provides, its emission diversity method may further comprise the steps:
The sequence data to be sent that step 2, first link receive does not need the processing of encoding, and directly first antenna by transmitter module is emitted to receiver module; Simultaneously,
The sequence data to be sent that second link receives is that unit carries out the FFT conversion with the frame, obtains corresponding frequency domain frame sequence after the conversion in the frequency domain.
Step 3 is carried out Modified Alamouti (MA) coding to above-mentioned frequency domain frame sequence, and the back data of will encode are then carried out the IFFT conversion, and after data transformed to the time domain sequences data after encoding, second antenna by transmitter module was emitted to receiver module;
Step 4, receiver module merges the two link sequences data that it receives, and the data after will merging are then carried out the FFT conversion, and the data after the merging transform to carries out Modified Alamouti decoding in the frequency domain, obtain former transmission frequency domain information;
Step 5 is carried out the IFFT conversion with above-mentioned former transmission frequency domain information, obtains time domain data, namely obtains final former transmission information.
Further, described step 4 is specially, and direct addition was sued for peace after receiver module received two link sequences data, realized two paths of data is merged; Data after will merging are then carried out the FFT conversion, the data after merging are transformed to carry out Modified Alamouti decoding in the frequency domain; During decoding, the data after being combined divide into groups to carry out Modified Alamouti decoding in twos, and decoding obtains corresponding former transmission frequency domain information.
Above-mentioned emission diversity method is specially:
Step 2, for Line1, as straight-through link, the data that the first antenna Tr1 sends are not made any coding and are handled, and still are Data; For Line2, at first sequence D ata to be sent is carried out the FFT conversion, transform to frequency domain, obtain corresponding to the frequency domain frame sequence;
Step 3 is carried out the MA space-frequency coding to above-mentioned frequency domain frame sequence, at last the data behind the coding is done the IFFT conversion, transforms to time domain, obtains the final emission data of Line2, launches by the second antenna Tr2;
Step 4, as shown in Figure 2, two link sequences data transfer to receiver module through channel, and the reception antenna Re that is received module receives respectively; The two link sequences data additions summation that reception antenna will receive is handled at the receiving terminal of receiver module; At receiving terminal, at first the data that receive are carried out the FFT conversion and transform to frequency domain, then frequency domain data is divided into groups to carry out the empty decoding frequently of MA in twos, obtain original transmission frequency domain information;
Step 5, the original transmission frequency domain information that decoding is obtained carries out the IFFT conversion again and transforms to time domain and obtain final decoded information, this information is exactly approximate to former transmission information D ata, and this decoded information will be identical with Data under the situation of the perfect no error code of channel condition.
The sequence data to be sent of described first link is expressed as: Tr1=Data;
The time domain sequences data of described second link are expressed as: Tr2=IFFT (MA (FFT (Data))).
Described final former transmission information D e_Data is expressed as:
Re=Re1+Re2;
De_Data=IFFT(DMA(FFT(Re)));
Wherein, Re1 is the sequence data of first antenna emission, and Re2 is the sequence data of second antenna emission, and Re is the two link sequences data that receiver module receives.
More than specific embodiments of the invention are described.It will be appreciated that the present invention is not limited to above-mentioned specific implementations, those skilled in the art can make various distortion or modification within the scope of the claims, and this does not influence flesh and blood of the present invention.
Claims (3)
1. MISO transmission diversity apparatus based on single carrier, it is characterized in that, comprise delivery module, link module, transmitter module and receiver module, described delivery module is connected with link module, and described link module is connected with receiver module by transmitter module;
Described link module comprises first link and second link, and described first link is straight-through link, and described second link is modified Almouti space-frequency coding link;
Described transmitter module comprises first antenna and second antenna, and described first antenna is connected with first link, and described second antenna is connected with second link.
2. the emission diversity method of the described MISO transmission diversity apparatus based on single carrier of a claim 1 is characterized in that, may further comprise the steps:
Step 1 is selected one road sequence to be sent, and this sequence to be sent is delivered to first link and second link of link module respectively by delivery module;
The sequence data to be sent that step 2, first link receive does not need the processing of encoding, and directly first antenna by transmitter module is emitted to receiver module; Simultaneously,
The sequence data to be sent that second link receives is that unit carries out the FFT conversion with the frame, obtains corresponding frequency domain frame sequence after the conversion in the frequency domain;
Step 3 is carried out Modified Alamouti coding to above-mentioned frequency domain frame sequence, and the back data of will encode are then carried out the IFFT conversion, and after data transformed to the time domain sequences data after encoding, second antenna by transmitter module was emitted to receiver module;
Step 4, receiver module merges the two link sequences data that it receives, and the data after will merging are then carried out the FFT conversion, and the data after the merging transform to carries out Modified Alamouti decoding in the frequency domain, obtain former transmission frequency domain information;
Step 5 is carried out the IFFT conversion with above-mentioned former transmission frequency domain information, obtains time domain data, namely obtains final former transmission information.
3. the emission diversity method of the MISO transmission diversity apparatus based on single carrier according to claim 2 is characterized in that described step 4 is specially, and receiver module receives directly addition summation after the two link sequences data, realizes two paths of data is merged; Data after will merging are then carried out the FFT conversion, the data after merging are transformed to carry out Modified Alamouti decoding in the frequency domain; During decoding, the data after being combined divide into groups to carry out Modified Alamouti decoding in twos, and decoding obtains corresponding former transmission frequency domain information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101275223A CN103236875A (en) | 2013-04-12 | 2013-04-12 | MISO (multiple input single output) transmit diversity device and method based on single-carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101275223A CN103236875A (en) | 2013-04-12 | 2013-04-12 | MISO (multiple input single output) transmit diversity device and method based on single-carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103236875A true CN103236875A (en) | 2013-08-07 |
Family
ID=48884896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013101275223A Pending CN103236875A (en) | 2013-04-12 | 2013-04-12 | MISO (multiple input single output) transmit diversity device and method based on single-carrier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103236875A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1791084A (en) * | 2004-12-17 | 2006-06-21 | 清华大学 | Time-domain synchronous OFDM space-frequency coding time-frequency combination channel estimating method |
| CN102325117A (en) * | 2011-08-26 | 2012-01-18 | 上海交通大学 | Emission diversity device compatible with digital terrestrial multimedia broadcast (DTMB) system and data processing method thereof |
| CN102804633A (en) * | 2009-06-18 | 2012-11-28 | 高通股份有限公司 | PUSCH transmit diversity scheme selection |
-
2013
- 2013-04-12 CN CN2013101275223A patent/CN103236875A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1791084A (en) * | 2004-12-17 | 2006-06-21 | 清华大学 | Time-domain synchronous OFDM space-frequency coding time-frequency combination channel estimating method |
| CN102804633A (en) * | 2009-06-18 | 2012-11-28 | 高通股份有限公司 | PUSCH transmit diversity scheme selection |
| CN102325117A (en) * | 2011-08-26 | 2012-01-18 | 上海交通大学 | Emission diversity device compatible with digital terrestrial multimedia broadcast (DTMB) system and data processing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112491501B (en) | Transmission device and transmission method for integrated physical layer protocol data unit | |
| US9749087B2 (en) | Apparatus, system and method of multi-user wireless communication | |
| CN100536375C (en) | System and method for digital multimedia broadcasting | |
| RU2546571C2 (en) | System and method for transmitting low density parity check signal | |
| CA2792929A1 (en) | Method and apparatus for transmitting and receiving data in a mimo system | |
| WO2015172277A1 (en) | Method and device for transmitting data between base band unit (bbu) and remote radio unit (rru) | |
| CN101997650B (en) | Transmission method, device and system of multi-antenna system data signals | |
| TWI247500B (en) | Multiple transmission/reception orthogonal frequency division multiplexing systems and methods | |
| CN102377477A (en) | Baseband signal transmission method and device | |
| CN106170934B (en) | Wireless forward pass passive optical network PON system, optical network device and method | |
| US20180013480A1 (en) | Header encoding and modulation for single carrier physical layer | |
| CN106416307B (en) | Information transmission method, network equipment and terminal equipment | |
| US8923759B2 (en) | Method and apparatus for transmitting CPRI signal by means of coaxial line | |
| CN103297373A (en) | Constant envelope orthogonal frequency division multiplexing modulation method | |
| CN1961515A (en) | Radio transmission device and radio transmission method in multi-carrier communication | |
| CN103155439A (en) | Systems and methods for transmit diversity for DFT precoded channels | |
| US8374271B2 (en) | Method and system for resizing a MIMO channel | |
| CN105940740B (en) | Handle method, network node and the terminal of data | |
| US20140079150A1 (en) | Data encoding methods and apparatus | |
| CN107371383A (en) | The method and apparatus of the equal power in the peak in wireless communication system is reduced for being filled using spectral mask | |
| CN103888146A (en) | Method, device and communication device for data compression | |
| CN101471755B (en) | Transmitter and signal transmission method | |
| CN104301278A (en) | Zero-fill method and device of mixed carrier WLAN system | |
| CN103546222A (en) | Method for transmitting and receiving emergency broadcast signal | |
| CN108156402B (en) | Transmitting and receiving device and audio and video wireless transmission 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130807 |
|
| RJ01 | Rejection of invention patent application after publication |