CN106656413A - Broadcasting channel data transmitting receiving method, broadcasting channel data transmitting method, and broadcasting channel data receiving method - Google Patents
Broadcasting channel data transmitting receiving method, broadcasting channel data transmitting method, and broadcasting channel data receiving method Download PDFInfo
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- CN106656413A CN106656413A CN201610690208.XA CN201610690208A CN106656413A CN 106656413 A CN106656413 A CN 106656413A CN 201610690208 A CN201610690208 A CN 201610690208A CN 106656413 A CN106656413 A CN 106656413A
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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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
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0057—Block codes
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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
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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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
- H04L5/0046—Determination of how many bits are transmitted on different sub-channels
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- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Abstract
The invention provides a broadcasting channel data transmitting receiving method executed by a multi-business transmission system compatible with single-antenna receiving and multi-antenna receiving. The broadcasting channel data transmitting receiving method comprises steps that a physical layer symbol sequence is grouped according to MISO business, service quality demands required by MIMO business, and multi-antenna constellation graph used by a transmitting end, and every physical layer symbol group is segmented at a bit level, and then MISO business sub-channels and MIMO business sub-channels at the bit level are acquired; the transmission data bits of the MISO business and the transmission data bits of the MIMO business are disposed in the corresponding bit layer sub-channels in a filled manner, and bit vectors filled with the business data are mapped in the constellation graph, and are transmitted by baseband equivalent channels; the MISO business sub-channels in received signals are decoded, and the MISO business data bits are acquired after the decoding, and then an MIMO receiving device is used to decode the MIMO business by taking the decoded MISO business data bits as apriori information.
Description
Technical field
The invention belongs to the broadcast of digital information transmission technical field, more particularly to broadband wireless mobile system or broadband terrestrial
Descending multi-service transport in system, and in particular to a kind of based on bit division multiplexing, compatible single antenna reception and single antenna
The multi-service transmission received with multiple antennas and transmitting terminal, receiving end device.
Background technology
In order to realize the more efficient utilization to frequency resource, new generation broadband wireless mobile system and broadband terrestrial broadcast system
System is widely used multi-antenna technology, is also called multiple-input and multiple-output（Multiple-Input Multiple-Output,
MIMO）Technology.Mimo system is due to the structure using many transmitting antennas and reception antenna, it is possible to obtain spatial multiplex gains with
Space diversity gain, realizes the raising of spectrum efficiency and link stability.Forth generation mobile radio system Long Term Evolution
（Long Term Evaluation, LTE）, European second generation terrestrial wireless DVB（2nd Generation
Digital Video Terrestrial Broadcasting, DVB-T2）In all support to improve transmission using MIMO technology
Performance.
In wideband wireless mobile communication system and broadband terrestrial broadcast transmission system from single antenna framework to multiple antennas framework
During evolution, multi-aerial receiver can progressively replace single antenna receiver in communication network.It is single in this evolution process
Aerial receiver and Dual-antenna receiver have quite a long time presence simultaneously in a network.Therefore, single antenna reception
Machine and the problem that the compatibility of multi-aerial receiver is necessary solution.If transmitting terminal only sends and is connect for single antenna receiver
The business of decoding is received, then the obtainable performance gain of multi-aerial receiver is very limited；On the other hand, if transmitting terminal only sends
The business of decoding is received for multi-aerial receiver, then single antenna receiver generally can not be properly received the business.Therefore, in order to have
Effect utilizes system resource, needs to design a kind of multiservice system, both includes to connect for single antenna in the signal that this system sends
The basic business that receipts machine and multi-aerial receiver are decoded simultaneously, and including the supplementary service that only multi-aerial receiver can be received.
In existing system, such as digital video broadcast system of the Europe towards hand-held reception of future generation（Digital Video
Terrestrial Broadcasting Next Generation Handhold, DVB-NGH）, to multi-aerial receiver
Support be one kind can lectotype, and single antenna receiver and multiple antennas are received compatible support it is the form for switching in mode
Realize.That is, existing system solves difference using orthogonal multiplexing modes such as time division multiplex and frequency division multiplexings mostly connecing
Receive the receiver compatibling problem of antenna structure.
Information theory principle points out, multiservice system that involved compatible single antenna reception is received with multiple antennas in demand etc.
Imitate in a MIMO broadcast channel model.There is transmitting terminal channel condition information in system（Channel State
Information at the Transmitter, CSIT）In the case of, can be with dirty paper code（Dirty Paper
Coding, DPC）To realize the channel capacity of MIMO broadcast channels；When system does not have CSIT, it is possible to use superposition
Encode to approach MIMO broadcast channel capacity.Information theory research shows, in two kinds of business received signal to noise ratio thresholding identical situations
Under, the capacity of MIMO broadcast channels is equal to capacity during time division multiplex.However, different in two kinds of business required signal-to-noise ratio thresholdings
In the case of, MIMO broadcast channels capacity is more than capacity during time division multiplex.That is, simply use time multiplexed transmission fitting
The different business that single antenna receiver and multi-aerial receiver are received is closed, the loss on capacity can be caused.
Bit level physical-layer sub-channel technology is a kind of broadcast channel multi-service transport technology.The main method of the technology
It is that the symbol stream of the transmission in Equivalent Base-Band system is divided into into subchannel in bit level, and transmits on different sub-channels
Different business.Because the bit that transmitting terminal transmits diverse location in planisphere has different protection class, therefore bit-level
Secondary physical-layer sub-channel technology is a kind of non-linear distribution to channel resource.May certify that bit level physical-layer sub-channel skill
Art has the performance for approaching broadcast channel capacity.
But, traditional bit level physical-layer sub-channel technology only considers single antenna transmissions system.When being applied to MIMO
System, it is especially desirable to when the receiver of compatible difference reception antenna number, traditional bit level physical-layer sub-channel skill
Art does not consider coding and constellation mapping mode of the different business between different antennae.Therefore the capacity with MIMO broadcast channels
Comparing has larger performance loss.
The content of the invention
In to solve the problems, such as prior art there is performance loss in MIMO transmission, there is provided a kind of higher compatibility of efficiency of transmission
The multi-service transport system that single antenna reception is received with multiple antennas.
A kind of broadcast channel data sending and receiving methods, the broadcast that methods described compatibility single antenna reception is received with multiple antennas
Channel multi-service transport, and can simultaneous transmission MISO business and MIMO business, it is characterised in that comprise the following steps：
Transmission data prepares：For the data and the data of MIMO business of MISO business, channel error control is independently carried out
Coding and Bit Interleave, obtain the transmission data bit stream of MISO business and MIMO business；
Packet：What the quality of service requirement and data transmitting equipment according to needed for MISO business and the transmission of MIMO business was used
Multiple antennas planisphere, is grouped to physical layer symbols sequence；
Obtain traffic sub channel：Bit level is grouped in each physical layer symbols to split, obtain the MISO of bit level
Traffic sub channel and MIMO traffic sub channels；
Data are filled and constellation mapping：By MISO business with the transmission data bit padding of MIMO business to corresponding bit level
Subchannel, and the bit vectors for being filled with business datum are mapped on planisphere, it is transmitted by baseband equivalence channel；
Data receiver is decoded：MISO traffic sub channels in the signal that receives are decoded, MISO business is therefrom decoded
Data bit, then MIMO receiver with the MISO bits of traffic data for decoding MIMO business is solved as prior information
Code.
A kind of broadcast channel data sending method, the broadcast that described sender method compatibility single antenna reception is received with multiple antennas
Channel multi-service transport, and can simultaneous transmission MISO business and MIMO business, comprise the following steps：
Transmission data prepares：For the data and the data of MIMO business of MISO business, channel error control is independently carried out
Coding and Bit Interleave, obtain the transmission data bit stream of MISO business and MIMO business；
Packet：What the quality of service requirement and data transmitting equipment according to needed for MISO business and the transmission of MIMO business was used
Multiple antennas planisphere, is grouped to physical layer symbols sequence；
Obtain traffic sub channel：Bit level is grouped in each physical layer symbols to split, obtain the MISO of bit level
Traffic sub channel and MIMO traffic sub channels；
Data are filled and constellation mapping：By MISO business with the transmission data bit padding of MIMO business to corresponding bit level
Subchannel, and the bit vectors for being filled with business datum are mapped on planisphere, it is transmitted by baseband equivalence channel.
A kind of broadcast channel data method of reseptance, the broadcast that the method for reseptance compatibility single antenna reception is received with multiple antennas
Channel multi-service transport, and can simultaneous transmission MISO business and MIMO business, comprise the following steps：
MISO traffic sub channels in the signal that receives are decoded, MISO bits of traffic data is therefrom decoded, then
MIMO receiver is decoded as prior information with the MISO bits of traffic data for decoding to MIMO business.
Compared to the multi-service transport system that prior art, the compatible single antenna reception that the present invention is provided are received with multiple antennas
System, compatible single antenna reception can connect in the mobile radio system of multi-antenna transmission or broadband terrestrial broadcast system with multiple antennas
The flexible system ginseng that receive, differentiation multi-service transport can be provided for the receiver with different antennae quantity, can be supported
Number configuration and flexible channel resource allocation.The present invention solve using bit division multiplexing mode MISO traffic sub channels and
The segmentation of MIMO traffic sub channels, compared to orthogonal channel resources methods of salary distribution such as traditional time division multiplexing, frequency division multiplexings, can obtain
Broadcast channel gain is obtained, the spectrum efficiency of system transfers is improved.
Description of the drawings
Fig. 1 is the multi-service transport system institute that compatible single antenna reception is received with multiple antennas in first embodiment of the invention
Using equipment block scheme.
Fig. 2 is the multi-service transport system that the compatible single antenna reception described in first embodiment of the invention is received with multiple antennas
The workflow diagram of system.
Fig. 3 is that the data bit of MISO business as shown in Figure 2 is mapped to the mode of MISO traffic sub channels and selects flow chart.
Fig. 4 be stuff data bits when MISO business does not adopt between antenna coding in data filling mode shown in Fig. 2 with
The schematic diagram of constellation mapping.
Fig. 5 is MISO business in data filling mode shown in Fig. 2 using the stuff data bits between antenna during repeated encoding
With the schematic diagram of constellation mapping.
Fig. 6 is MISO business in data filling mode shown in Fig. 2 using the data bit between antenna during space-time block code
Filling and the schematic diagram of constellation mapping.
Fig. 7 carries out decoding process figure for receiver shown in Fig. 2 to the signal for receiving.
Fig. 8 is the broadcast channel multi-service system that compatible single antenna reception and multiple antennas are received in second embodiment of the invention
The workflow diagram of system connection 10.
Fig. 9 be in the decoding of data shown in Fig. 8 when MISO business does not adopt between antenna coding MISO business and MIMO business
By bit Bit Interleaved Coded Modulation curve map.
Figure 10 is when MISO business adopts between antenna repeated encoding and MISO industry during Space Time Coding in the decoding of data shown in Fig. 8
Business coded modulation curve map.
Figure 11 is the broadcast channel multi-service that compatible single antenna reception and multiple antennas are received in third embodiment of the invention
The flow chart of system connection.
Figure 12 is the joint transmission rate curve of MIMO business and MISO business in the decoding of data shown in Figure 11.
Figure 13 is using MIMO business during BICM iterative demappings and the connection of MISO business in data decoding as shown in figure 12
Close transfer rate performance upper bound curve map.
Main element symbol description
| The multi-service transport system that compatible single antenna reception is received with multiple antennas | 10 |
| Emitter | 11 |
| Receiver | 12 |
| Single antenna receiver | 121 |
| Multi-aerial receiver | 122 |
| Step | S11~S17、S141~S143、S171~S173、S21~S27、S31~S37 |
Following specific embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.
Specific embodiment
In conventional systems, it is the compatibling problem of the receiver for solving different reception antenna numbers, generally using to channel
The method of resource quadrature divide, i.e., carry out multi-service transport using modes such as time division multiplex or frequency division multiplexings.However, using just
Hand over the joint transmission rate capability of system of channel resource segmentation much smaller than the combined channel capacity domain of broadcast channel, cause frequency
The waste of spectrum efficiency.In addition, traditional bit segmentation physical-layer sub-channel technology is applied to single antenna transmissions system, and
The data bit of multiple business is mapped directly in bit-level physical-layer sub-channel.
In order to realize the effectively utilizes of channel resource, the present invention adopts the physical-layer sub-channel technology based on bit segmentation,
By the way that broadcast channel is divided into into two bit level physics of MIMO traffic sub channels and MISO traffic sub channels in bit level
Layer sub-channels are realizing the compatible transmission of MIMO business and MISO business.Based on the physical-layer sub-channel technology quilt that bit is split
Prove a kind of with the multi-service transport technology for approaching broadcast channel capacity.
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in further detail.Implementation below is to use
In the explanation present invention, but it is not limited to the scope of the present invention.
First embodiment
Fig. 1 is referred to, it is the multi-service transport system 10 that compatible single antenna reception of the present invention is received with multiple antennas
Block diagram.Described compatible single antenna receiver and the Transmission system 10 of multi-aerial receiver is applied in broadcast channel.
The Transmission system 10 of compatible single antenna receiver and multi-aerial receiver includes emitter 11 and receiver 12, its
In, emitter 11 adopts multiple antennas framework, for sending two kinds of different business datums.This two kinds different business datum difference
It is the business MIS O business for receiving decoding simultaneously for single antenna receiver and multi-aerial receiver（Multiple-Input
Single-Outiput, hereinafter referred to as MISO business）, and the business that decoding is only received for multi-aerial receiver（Hereinafter referred to as
For MIMO business）.Receiver 12 includes single antenna receiver 121 and multi-aerial receiver 122 in network, wherein,
Single antenna receiver 121 is used in the signal sent from emitter 11 decode the MISO business on basis, multi-aerial receiver
The 122 MISO business and additional MIMO business for being used for decoded base.
Present embodiment considers the broadcast channel multiservice system of a double antenna transmitting, for sending two kinds of business：
MISO business and MIMO business, wherein MISO business receive decoding, MIMO for single antenna receiver and Dual-antenna receiver simultaneously
Business only receives decoding for Dual-antenna receiver.
, wherein it is desired to explanation, for can bidirectional data transfers broadband wireless mobile system, present embodiment correspondence its
In downlink, i.e. emitter 11 can be signal base station or broadband wireless router, receiver 12 can for mobile phone or
Panel computer.In other embodiment of the present invention, the terrestrial wideband broadcast system of correspondence one-way data transfer, emitter 11 can
For signal base station, receiver 12 is the digit signal receiver of the playing audio/videos such as TV.
Fig. 2 is referred to, wherein, Fig. 2 is that the compatible single antenna reception described in first embodiment of the invention connects with multiple antennas
The multi-service transport system 10 of receipts performs the workflow diagram of broadcast channel data sending and receiving methods.With reference to Fig. 1 and figure
2, the workflow of the multi-service transport system 10 that compatible single antenna reception is received with multiple antennas is illustrated, concrete steps are such as
Under：
Step S11, for the data and the data of MIMO business of MISO business, independently carry out channel error control coding and
Bit Interleave, obtains the transmission data bit stream of MISO business and MIMO business.Wherein, adoptWithTo distinguish
Represent send in symbol sebolic addressing the on two transmitting antennasIndividual symbol.
Step S12, the quality of service requirement and data transmitting equipment according to needed for MISO business and the transmission of MIMO business
The multiple antennas planisphere for being used, is grouped to physical layer symbols sequence.Wherein, the data transmitting equipment that is to say transmission
Machine 11, in addition, data transmitting symbol sebolic addressingWithUseRank planisphere is modulated.
Needed for wherein, described required service quality requirement, including the two kinds of business transmission of MISO business and MIMO business
Data rate and required minimum decoding threshold.Described is grouped to physical layer symbols sequence, refers to physical layer channel
Some adjacent symbols form a whole in the symbol stream of middle transmission.
Step S13, transmits required service quality requirement, for each physical layer symbols according to MISO business and MIMO business
It is grouped in bit level to be split, obtains the MISO traffic sub channels and MIMO traffic sub channels of bit level.
WithIt is mapped to representBit vectors, wherein,
Using bit level physical-layer sub-channel technology, bit vectorsWithIn a part of bit distribute to
MIMO business, constitutes MIMO traffic sub channels；Another part bit distributes to MISO business, constitutes MISO traffic sub channels.
According to the required service quality requirement, for the physical layer symbols sequence of packets obtained in step S2, to the symbol
Bit included in number sequence of packets is split, and segmentation obtains two bit-levels time subchannel, is respectively used to transmit MISO
Business and MIMO business.
Wherein, the bit-level time subchannel for transmitting MISO business is referred to as MISO traffic sub channels, for transmitting MIMO
The bit-level time subchannel of business is referred to as MIMO traffic sub channels.
Step S14, by MISO business with the transmission data bit padding of MIMO business to the secondary subchannel of corresponding bit-level.
Wherein, by the stuff data bits of MIMO business to MIMO traffic sub channels, by the stuff data bits of MISO business to MISO
Traffic sub channel.Then the bit vectors of the data bit of two kinds of business will be filled withTransmission symbol is mapped to by planisphere
Number.Further, the data bit of MIMO business directly independently maps MIMO traffic sub channels, and data of MISO business
Bit map to MISO traffic sub channels also include various ways, thus, need according to the son letter for being actually needed selection MISO business
Road filling mode.
Specifically, due to the multi-service transport system 10 that compatible single antenna reception and multiple antennas are received be multi-antenna transmission,
The system that single antenna and multiple antennas are received, therefore the data bit of MIMO business and MISO business is being flowed to into bit-level second son letter
During road maps, encoded question between antenna is considered.Accordingly, for MIMO business, it is possible to use split with conventional bit
The direct mapping mode of physical-layer sub-channel technology identical.For MISO business, present embodiment includes three kinds of mapping modes,
It is respectively that absolute coding directly maps, i.e., does not adopt and encoded between antenna；Repeated encoding mapping between antenna；Space-time block between antenna
Code mapping.
The stuff data bits by MIMO business are referred to the concrete mode of MIMO traffic sub channels, by MIMO business
Sequence of data bits order be filled on each bit position in MIMO traffic sub channels.For MIMO traffic sub channels exist
Bit position in different antennae, fills the data bit of MIMO business by the way of spatial reuse, does not use between antenna
Restriction relation.
Fig. 2 and Fig. 3 is referred to, wherein, Fig. 3 is that the data bit of MISO business as shown in Figure 2 is mapped to MISO business
The mode of channel selects flow chart.As shown in figure 3, the data bit of MISO business is mapped to MISO traffic sub channels including three kinds
Mode, user can be according to the subchannel filling mode for being actually needed selection MISO business：
Step S141, absolute coding is directly filled：The data bit of MISO business is directly filled on MISO traffic sub channels.
The concrete mode that the data bit by MISO business is directly filled into MISO traffic sub channels is referred to, by the number of MISO business
It is filled on each bit position in MISO traffic sub channels according to bit sequence order.For MISO traffic sub channels are in difference
Bit position on antenna, fills the data bit of MISO business by the way of spatial reuse, does not use the pact between antenna
Beam relation.
Specifically, the data bit of MISO business is directly filled on MISO traffic sub channels, i.e., is not adopted between antenna
Coding.For MISO traffic sub channels, each the bit position filling in bit vectors is MISO bits of traffic data
Different bits in stream.Bit vectors after being filled with MIMO business and MISO bits of traffic dataWithLed to
Cross identical mapping mode and be mapped to constellation symbolWith.As shown in figure 4, wherein, Fig. 4 is that data are filled out shown in Fig. 2
Fill the schematic diagram of stuff data bits when MISO business in mode does not adopt between antenna coding and constellation mapping, planisphere with
As a example by 16-QAM, therefore the bit vectors on every transmitting antenna include 4 bits, and constellation mapping mode is mapped using Gray.
Step S142, by the stuff data bits of MISO business to MISO industry by the way of repeated encoding mapping between antenna
In business subchannel, and ensure that the bit of same position on different transmitting antennas is identical.The MISO bits of traffic data is to MISO
The fill method of traffic sub channel refers to, by the sequence of data bits order of MISO business be filled in MISO traffic sub channels by
On each bit position for the part that same antenna sends so that the ratio that all transmitting antennas are sent in MISO traffic sub channels
Special sequence is identical.
Specifically, the data bit of MISO business is mapped on MISO traffic sub channels, and ensures different transmitting antennas
The bit of upper same position is identical.As shown in figure 5, wherein, Fig. 5 is that MISO business adopts day in data filling mode shown in Fig. 2
The schematic diagram of stuff data bits and constellation mapping between line during repeated encoding.First when subchannel is split, it is ensured that different
Bit in the bit vectors of transmitting antenna in same position distributes to identical subchannel.That is, in bit vectors
BitWithOr MISO subchannels are distributed to simultaneously, or MIMO traffic sub channels are distributed to simultaneously.
When MISO bits of traffic data is filled to MISO traffic sub channels, for the bit of two bit vectors same positions,
The data bit of filling identical MISO business, if that is,WithBelong to MISO traffic sub channels, then meet.The constellation mapping that constellation mapping mode is adopted with method 1 is identical, is filled with the ratio of service bits stream
Special vectorWithConstellation symbol is mapped to by identical mapping modeWith。
Step S143, using space-time block code mapping between antenna by the stuff data bits of MISO business to MISO business
In subchannel, it is ensured that the bit of same position meets space-time diversity code criterion on adjacent-symbol difference transmitting antenna.
The MISO bits of traffic data is referred to the filling mode of MISO traffic sub channels, by the data ratio of MISO business
Special Sequence Filling on MISO traffic sub channels, and by space-time diversity code so that only considering MISO traffic sub channels
In the case of, many transmitting antennas meet space-time block code criterion between adjacent transmission symbol.
Specifically, the data bit of MISO business is mapped on MISO traffic sub channels, and ensures that adjacent-symbol is different
The bit of same position meets space-time diversity code criterion on transmitting antenna.It is identical with bit-level time subchannel dividing mode, together
Sample requires that the bit of same position in different bit vectors is assigned to identical business, i.e. bitWithOr by simultaneously
MISO subchannels are distributed to, or is distributed to MIMO traffic sub channels simultaneously.And require within the space-time packet of vector,
The method of salary distribution of traffic sub channel is identical.Double antenna emitter is adopted in present embodiment, therefore the length of space-time packet is 2.
With constellation mapping as shown in fig. 6, wherein, Fig. 6 is MISO in data filling mode shown in Fig. 2 for the filling of service bits
Business is using the stuff data bits between antenna during space-time block code and the schematic diagram of constellation mapping.In a space-time packet
First moment, the data bit of MISO business independently filled on the MISO traffic sub channels at the moment；In identical space-time point
At second moment in group, bit vectors are identical on the transmitting antenna different from a upper moment of the bit on MISO traffic sub channels
Bit on position is identical, i.e. MISO bits of traffic data filling mode meet the constraint condition,.When the mapping of planetary is entered, first moment in space-time packet, two transmitting days
The constellation mapping mode of line is identical, usesRepresent；Second moment in space-time packet, the mapping mode point of two transmitting antennas
It is notWith, that is, it is each mapped to the negative planisphere and negative conjugation planisphere of former planisphere.
Step S15, according to coded system, the bit vectors to filling finishing service data carry out constellation mapping.That is to say
Only consider the baseband equivalence system under falt fading channel in present embodiment, that is, the data bit flow for sending through channel coding it
After be mapped to baseband signalling sequence.
After completing bit padding and constellation mapping, obtain base band and send symbol.WillIn Equivalent Base-Band system
Send on system, complete multi-service transport.
Step S16, data receiver is transmitted by the transmitting of Equivalent Base-Band system, through fading channel and superimposed noise, namely
It is to be superimposed with noise after the decline that baseband signalling sequence passes through baseband equivalence channel, obtains receiving signal sequence.For frequency
Selective Fading Channel, it is possible to use OFDM is converted into the falt fading channel on frequency domain.When using OFDM, above-mentioned baseband signalling
Sequence is the sequence that the baseband signalling for transmitting on different sub-carriers is constituted.
Step S17, the corresponding receiver 12 of MISO business and MIMO business 12 pairs of signals for receiving of corresponding receiver
Decoded.Wherein, the decoding includes that demapping and channel are translated, and the decoding process is by the way of based on independent demapping
Or the mode based on iterative demapping.
Specifically, Fig. 2 and Fig. 7 is seen also, wherein, Fig. 7 is that the signal that receiver 12 pairs is received carries out decoded stream
Cheng Tu.As shown in fig. 7, MISO receivers and MIMO receiver include to the concrete steps that the signal for receiving is decoded：
Step S171, decodes to MISO traffic sub channels, and that is to say carries out demapping and channel to MISO traffic sub channels
Decoding, MISO receivers and MIMO receiver are decoded to the MISO traffic sub channels in the signal that receives, are therefrom decoded
Go out MISO bits of traffic data.
In step S172, the type of receiver 12 is judged, that is to say that whether including multiple antennas in judgement receiver 12 connects
Receipts machine 122.
Step S173, if receiver is multi-aerial receiver, MIMO receiver is by the data of the MISO business for decoding
Bit is decoded as prior information, the MIMO traffic sub channels to receiving, and the decoding includes that demapping and channel are translated
Code, so as to decode MIMO bits of traffic data.Wherein, the data bit of MIMO business is directly filled into MIMO traffic sub channels
On.If receiver 12 is not multi-aerial receiver, flow process terminates.
Second embodiment
Fig. 8 is referred to, it is that the broadcast channel that compatible single antenna reception and multiple antennas are received in second embodiment of the invention is more
The workflow diagram of operation system connection 10.
Present embodiment is essentially identical with first embodiment, differs only in the decoding side of MIMO business and MISO business
Method is different.
Specifically, step S21, for the data and the data of MIMO business of MISO business, independently carries out bad channel
Mistake control coding and Bit Interleave, obtain the transmission data bit stream of MISO business and MIMO business.
Step S22, the quality of service requirement and transmitting terminal according to needed for MISO business is with the transmission of MIMO business is used
Multiple antennas planisphere, physical layer symbols sequence is grouped.
Step S23, transmits required service quality requirement, for each physical layer symbols according to MISO business and MIMO business
It is grouped in bit level to be split, obtains the MISO traffic sub channels and MIMO traffic sub channels of bit level.
Step S24, by MISO business with the transmission data bit padding of MIMO business to the secondary subchannel of corresponding bit-level.
Step S25, according to coded system, the bit vectors to filling finishing service data carry out constellation mapping.
Step S26, is transmitted, through fading channel and superimposed noise by the transmitting of Equivalent Base-Band system.
Step S27, receiver is decoded to the signal for receiving.Wherein, the decoding includes that demapping and channel are translated
Code.
For single antenna receiver 121（Fig. 1）, the MISO business during directly docking is collected mail number decoded；For double days
Line receiver 122（Fig. 1）, first from the MISO business that decode in signal is received, then again with the MISO business that decodes as priori
Information further decodes MIMO business.
In decoding process, for MISO business, first demapping is carried out to it, using Log-MAP demappings, obtained
MISO business is by bit log-likelihood ratio：
WhereinRepresent and send sign matrix,MISO fading channel matrix is represented,Represent what single antenna receiver was received
Signal,The multiple antennas joint planisphere set under the filling constraint of MISO bits of traffic data is represented,Represent and meet
Constellation symbol composition set,Represent the variance of noise.
This demapping mode is referred to as BICM independence demappings.Log-likelihood ratio obtained by demapping can be sent directly into
The channel decoder of software- redundancy carries out channel decoding, and the MISO business for obtaining independent demapping receives bit stream.
In addition to independent demapping, it would however also be possible to employ the method for iterative demapping further improves decoding performance.Through
The coding of Bit Interleave is deinterleaved after decoding, and calculates corresponding external information, and external information is further used as prior information weight
New decoder of sending into enters row decoding.Wherein, the computing formula of external information is
In formula,The log-likelihood ratio of prior information is represented,Represent theRoot antennaPriori letter on individual bit position
The log-likelihood ratio of breath,The priori probability density function for sending symbol is represented,Represent and receive symbol
Posterior probability density function.
The filling of MISO bits of traffic data and constellation mapping mode for Space Time Coding, will first carry out space-time decoding.
For the reception symbol in a space-time packetWith, the Orthogonal Decomposition on channel direction
WhereinFor channel matrix.
By orthogonal transformation, inter-antenna interference of the MISO business on the bit of same position can be eliminated, while changing
The distribution of equivalent channel decline, realizes space diversity.WithAs a example by, its conditional probability density function should be
Can be right according to above formulaDemapping operation is carried out, the decoding process under connecing is with other stuff data bits and constellation mapping
Decoding process under mode is identical.
May certify that, when using BICM independence demappings, two kinds of business can be by by bit BICM Average Mutuals
Equation below is calculated, when MISO business is using absolute coding and repeated encoding：
WhereinMIMO fading channel matrix is represented,Represent with regard to stochastic variableMathematic expectaion, y represent receive
Signal.
When MISO business adopts Space Time Coding：
As shown in figure 9, wherein, Fig. 9 be in the decoding of data shown in Fig. 8 when MISO business does not adopt coding between antenna MISO business
With MIMO business by bit Bit Interleaved Coded Modulation curve map.As shown in Fig. 9 shows, it understands to have stated clearly works as MISO business not
During using encoding between antenna, planisphere using in the case of 16-QAM, two kinds of business by bit BICM Average Mutuals.Due to
There are the bit of two kinds of different protection class, therefore every kind of business two curves of correspondence in 16-QAM planispheres.
As shown in Figure 10, wherein, Figure 10 be data shown in Fig. 8 decoding in when MISO business adopt antenna between repeated encoding and
MISO operation codes adjustment curve figure during Space Time Coding.As shown in Figure 10, it understands and has stated clearly when MISO business is adopted between antenna
When repeated encoding and Space Time Coding, MISO business by bit BICM Average Mutuals, planisphere equally adopt 16-QAM.
3rd embodiment
Figure 11 is referred to, it is that the broadcast channel that compatible single antenna reception and multiple antennas are received in third embodiment of the invention is more
The flow chart of operation system 10.
Present embodiment is essentially identical with first embodiment, differs only in the decoding side of MIMO business and MISO business
Method is different.
Specifically, step S31, for the data and the data of MIMO business of MISO business, independently carries out bad channel
Mistake control coding and Bit Interleave, obtain the transmission data bit stream of MISO business and MIMO business.
Step S32, the quality of service requirement and transmitting terminal according to needed for MISO business is with the transmission of MIMO business is used
Multiple antennas planisphere, physical layer symbols sequence is grouped.
Step S33, transmits required service quality requirement, for each physical layer symbols according to MISO business and MIMO business
It is grouped in bit level to be split, obtains the MISO traffic sub channels and MIMO traffic sub channels of bit level.
Step S34, by MISO business with the transmission data bit padding of MIMO business to the secondary subchannel of corresponding bit-level.
Step S35, according to coded system, the bit vectors to filling finishing service data carry out constellation mapping.
Step S36, is transmitted, through fading channel and superimposed noise by the transmitting of Equivalent Base-Band system.
Step S37, receiver is decoded to the signal for receiving.Wherein, the decoding includes that demapping and channel are translated
Code.
WithRepresent the joint transmission speed of MIMO business and MISO business.For given MIMO business and
The signal-noise ratio threshold of MISO businessUnder, each bit-level time sub-channel allocation schemeCorrespondence one
Value。
Have in physical layer symbols packet described in default step S32Individual symbol.If whereinIndividual symbol is corresponding
MIMO business is with the joint transmission speed of MISO, thenAverage joint transmission speed in individual symbol is
By the bit-level time sub-channel allocation scheme for adjusting each symbol, it is possible to achieveDifferent values, be designated as。
In joint transmission speedBe possible in value, following steps can be used to search for its upper bound：
C1, allValue composition set in, select, now, table
Show that all bits in now bit vectors are distributed on MIMO traffic sub channels；
C2, for, have
Then the joint transmission speed upper bound of MIMO business and MISO business byBe given.
Figure 12 is referred to, wherein, Figure 12 is the joint transmission of MIMO business and MISO business in the decoding of data shown in Figure 11
Rate curve.As shown in figure 12, repeated encoding and Space Time Coding between absolute coding, antenna is adopted in MISO business, and is adopted
During BICM independence demappings, the joint transmission rate profile of MIMO business and MISO business.Wherein, two days of emitter
It is modulated using 16-QAM planispheres on line, fading channel adopts Rayleigh channels, MIMO business and MISO business
Decoding threshold is respectively 10dB and 5dB.Give simultaneously in Fig. 6 and divide multiplexing when employed to transmit joint transmission during multi-service
Speed.As can be seen that broadcast channel multiservice system proposed by the present invention compared to time division multiplex system in joint transmission speed
On have significant performance gain.Also, in the subchannel filling and constellation mapping mode of various MISO business, Space Time Coding
Multi-service joint transmission rate gain is maximum.
When using BICM iterative demappings, multi-service joint transmission speed can further obtain gain, that is, approach volume
Code modulation（Coded Modulation, CM）Average Mutual.It is determined that bit-level time subchannel splitting scheme under, adopt
The computing formula of the multi-service joint transmission speed that BICM iterative demappings are obtained is as follows：
For MISO business：
For MIMO business：
Wherein,The bit number that per channel is used is represented,Represent with regard to stochastic variableMathematic expectaion,
The channel condition information of MIMO receiver is represented,Represent the channel condition information of MISO receivers.
Figure 13 is referred to, wherein, Figure 13 is using MIMO industry during BICM iterative demappings in data as shown in figure 12 decoding
Business and the joint transmission rate capability upper bound curve map of MISO business.As shown in figure 13, transmitting antenna planisphere still adopts 16-
QAM, fading channel adopts Rayleigh channels, MIMO business to be respectively 10dB and 5dB, MISO with the decoding threshold of MISO business
It is Space Time Coding that traffic sub channel is filled with constellation mapping mode.As can be seen that phase can be obtained using BICM iterative demappings
Than in the further performance gain of BICM independence demappings.The broadcast channel capacity under Gauss input is given in Fig. 7, i.e., extensively
Broadcast channel transmission rate theoretical maximum.By contrast it is found that compatible single antenna reception proposed by the present invention and multiple antennas
The broadcast channel multi-service transport system of reception has the performance of approximation theory joint transmission rate limit.
Embodiment of above only to illustrate technical scheme and non-limiting, reference only to better embodiment pair
The present invention has been described in detail.It will be understood by those within the art that, technical scheme can be carried out
Modification or equivalent, without deviating from the spirit and scope of technical solution of the present invention, all should cover the claim in the present invention
In the middle of scope.
Claims (28)
1. a kind of broadcast channel data sending and receiving methods, the broadcast letter that methods described compatibility single antenna reception is received with multiple antennas
Road multi-service transport, can simultaneous transmission MISO business and MIMO business, it is characterised in that comprise the following steps：
Transmission data prepares：For the data and the data of MIMO business of MISO business, channel error control is independently carried out
Coding and Bit Interleave, obtain the transmission data bit stream of MISO business and MIMO business；
Packet：What the quality of service requirement and data transmitting equipment according to needed for MISO business and the transmission of MIMO business was used
Multiple antennas planisphere, is grouped to physical layer symbols sequence；
Obtain traffic sub channel：Bit level is grouped in each physical layer symbols to split, obtain the MISO of bit level
Traffic sub channel and MIMO traffic sub channels；
Data are filled and constellation mapping：By MISO business with the transmission data bit padding of MIMO business to corresponding bit level
Subchannel, and the bit vectors for being filled with business datum are mapped on planisphere, it is transmitted by baseband equivalence channel；
Data receiver is decoded：MISO traffic sub channels in the signal that receives are decoded, MISO business is therefrom decoded
Data bit, then MIMO receiver with the MISO bits of traffic data for decoding MIMO business is solved as prior information
Code.
2. broadcast channel data sending and receiving methods according to claim 1, it is characterised in that institute in the packet step
Data rate and required minimum decoding threshold needed for the required service quality requirement stated, including two kinds of business transmission.
3. broadcast channel data sending and receiving methods according to claim 1, it is characterised in that institute in the packet step
That what is stated is grouped into some adjacent symbol compositions in the symbol stream that will be transmitted in physical layer channel to physical layer symbols sequence
One entirety.
4. broadcast channel data sending and receiving methods according to claim 1, it is characterised in that walk in data filling
It is that the data bit of MIMO business is suitable that MIMO bits of traffic data described in rapid is filled into the mode of MIMO traffic sub channels
Sequence is filled on each bit position of MIMO traffic sub channels.
5. according to the broadcast channel data sending and receiving methods described in claim 1, it is characterised in that in data filling
MISO bits of traffic data described in step is filled into MISO traffic sub channels, and the mode bag of bit vectors constellation mapping
Include：
Absolute coding is directly filled：The data bit of MISO business is directly filled on MISO traffic sub channels；Or
Repeated encoding between antenna：By on the stuff data bits of MISO business to MISO traffic sub channels, and ensure different transmittings
The bit of same position is identical on antenna；Or
Space-time block code：By on the stuff data bits of MISO business to MISO traffic sub channels, and ensure adjacent-symbol not
Meet space-time diversity code criterion with the bit of same position on transmitting antenna.
6. according to the broadcast channel data sending and receiving methods described in claim 5, it is characterised in that in the absolute coding
By the concrete mode that the data bit of MISO business is directly filled into MISO traffic sub channels it is by MISO business described in mode
Sequence of data bits order be filled on each bit position in MISO traffic sub channels.
7. according to the broadcast channel data sending and receiving methods described in claim 6, it is characterised in that in the absolute coding
Bit position in mode for MISO traffic sub channels on different antennas, fills MISO business by the way of spatial reuse
Data bit, do not use the restriction relation between antenna.
8. according to the broadcast channel data sending and receiving methods described in claim 5, it is characterised in that the weight between the antenna
The sequence of data bits order of MISO business is filled in MISO traffic sub channels in multiple coded system is sent by same antenna
Part each bit position on so that the bit sequence that all transmitting antennas are sent in MISO traffic sub channels is identical.
9. broadcast channel data sending and receiving methods as claimed in claim 8, it is characterised in that cause when subchannel is split
Bit in the bit vectors of different transmitting antennas in same position distributes to identical subchannel, and MISO business is being believed
When road filling MISO bits of traffic data, for the bit of two bit vectors same positions, identical MISO industry is filled
The data bit of business.
10. according to the broadcast channel data sending and receiving methods described in claim 5, it is characterised in that in the space-time point
The sequence of data bits of MISO business is filled on MISO traffic sub channels in group coded system, and is compiled by space and time diversity
Code so that in the case where only MISO traffic sub channels are considered, many transmitting antennas meet space-time between adjacent transmission symbol
Diversity encodes criterion.
11. according to the broadcast channel data sending and receiving methods described in claim 1, it is characterised in that the data receiver
Decoding process described in decoding step includes the mode and the mode based on iterative demapping based on independent demapping.
12. according to the broadcast channel data sending and receiving methods described in claim 1, it is characterised in that walk in data filling
Also include step after rapid：
According to coded system, the bit vectors to filling finishing service data carry out constellation mapping into baseband signalling sequence.
13. according to the broadcast channel data sending and receiving methods described in claim 1, it is characterised in that in data receiver solution
In code step, baseband signalling sequence is connect by the transmitting transmission of Equivalent Base-Band system after fading channel and superimposed noise
Receive symbol sebolic addressing.
14. according to the broadcast channel data sending and receiving methods described in claim 1, it is characterised in that in data receiver solution
Code step also includes：
MISO traffic sub channels in receiving symbol sebolic addressing are decoded, and obtain the data bit of MISO business；
If receiving device is multiple antennas receiving device, MIMO receiver is using the data bit of the MISO business for decoding as elder generation
Information is tested, the MIMO traffic sub channels to receiving are decoded, the decoding includes demapping and channel decoding, so as to decode
Go out MIMO bits of traffic data, wherein, the data bit of MIMO business is directly filled on MIMO traffic sub channels.
A kind of 15. broadcast channel data sending methods, the broadcast that described sender method compatibility single antenna reception is received with multiple antennas
Channel multi-service transport, can simultaneous transmission MISO business and MIMO business, it is characterised in that comprise the following steps：
Transmission data prepares：For the data and the data of MIMO business of MISO business, channel error control is independently carried out
Coding and Bit Interleave, obtain the transmission data bit stream of MISO business and MIMO business；
Packet：What the quality of service requirement and data transmitting equipment according to needed for MISO business and the transmission of MIMO business was used
Multiple antennas planisphere, is grouped to physical layer symbols sequence；
Obtain traffic sub channel：Bit level is grouped in each physical layer symbols to split, obtain the MISO of bit level
Traffic sub channel and MIMO traffic sub channels；
Data are filled and constellation mapping：By MISO business with the transmission data bit padding of MIMO business to corresponding bit level
Subchannel, and the bit vectors for being filled with business datum are mapped on planisphere, it is transmitted by baseband equivalence channel.
16. broadcast channel data sending methods according to claim 15, it is characterised in that described in the packet step
Required service quality requirement, including the data rate and required minimum decoding threshold needed for the transmission of two kinds of business.
17. broadcast channel data sending methods according to claim 15, it is characterised in that described in the packet step
Some adjacent symbols compositions one in the symbol stream that will be transmitted in physical layer channel are grouped into physical layer symbols sequence
Individual entirety.
18. broadcast channel data sending methods according to claim 15, it is characterised in that in the data filling step
Described in MIMO bits of traffic data to be filled into the mode of MIMO traffic sub channels be by the data bit of MIMO business order
It is filled on each bit position of MIMO traffic sub channels.
19. according to the broadcast channel data sending method described in claim 15, it is characterised in that walk in data filling
MISO bits of traffic data described in rapid is filled into MISO traffic sub channels, and the mode bag of bit vectors constellation mapping
Include：
Absolute coding is directly filled：The data bit of MISO business is directly filled on MISO traffic sub channels；Or
Repeated encoding between antenna：By on the stuff data bits of MISO business to MISO traffic sub channels, and ensure different transmittings
The bit of same position is identical on antenna；Or
Space-time block code：By on the stuff data bits of MISO business to MISO traffic sub channels, and ensure adjacent-symbol not
Meet space-time diversity code criterion with the bit of same position on transmitting antenna.
20. according to the broadcast channel data sending method described in claim 19, it is characterised in that in the absolute coding side
By the concrete mode that the data bit of MISO business is directly filled into MISO traffic sub channels it is by MISO business described in formula
Sequence of data bits order is filled on each bit position in MISO traffic sub channels.
21. according to the broadcast channel data sending method described in claim 20, it is characterised in that in the absolute coding side
Bit position in formula for MISO traffic sub channels on different antennas, fills MISO business by the way of spatial reuse
Data bit, does not use the restriction relation between antenna.
22. according to the broadcast channel data sending method described in claim 19, it is characterised in that repeat between the antenna
The sequence of data bits order of MISO business is filled in MISO traffic sub channels in coding mapping mode is sent out by same antenna
On each bit position for the part sent so that the bit sequence phase that all transmitting antennas are sent in MISO traffic sub channels
Together.
23. broadcast channel data sending methods according to claim 22, it is characterised in that cause when subchannel is split
Bit in the bit vectors of different transmitting antennas in same position distributes to identical subchannel, and MISO business is being believed
When road filling MISO bits of traffic data, for the bit of two bit vectors same positions, identical MISO industry is filled
The data bit of business.
24. according to the broadcast channel data sending method described in claim 19, it is characterised in that in the space-time block
The sequence of data bits of MISO business is filled on MISO traffic sub channels, and by space-time diversity code in code mode, is made
Obtain in the case where only MISO traffic sub channels are considered, many transmitting antennas meet space and time diversity volume between adjacent transmission symbol
Code criterion.
A kind of 25. broadcast channel data method of reseptances, the broadcast that the method for reseptance compatibility single antenna reception is received with multiple antennas
Channel multi-service transport, and can simultaneous transmission MISO business and MIMO business, it is characterised in that comprise the following steps：
MISO traffic sub channels in the signal that receives are decoded, MISO bits of traffic data is therefrom decoded, then
MIMO receiver is decoded as prior information with the MISO bits of traffic data for decoding to MIMO business.
26. according to the broadcast channel data method of reseptance described in claim 25, it is characterised in that the data receiver decoding
Decoding process described in step includes the mode and the mode based on iterative demapping based on independent demapping.
27. according to the broadcast data receiving method described in claim 25, it is characterised in that in data receiver decoding step
In, baseband signalling sequence obtains receiving symbol by the transmitting transmission of Equivalent Base-Band system after fading channel and superimposed noise
Sequence.
28. according to the broadcast data receiving method described in claim 25, it is characterised in that in data receiver coding step also
Including：
MISO traffic sub channels in receiving symbol sebolic addressing are decoded, and obtain the data bit of MISO business；
If receiving device is multiple antennas receiving device, MIMO receiver is using the data bit of the MISO business for decoding as elder generation
Information is tested, the MIMO traffic sub channels to receiving are decoded, the decoding includes demapping and channel decoding, so as to decode
Go out MIMO bits of traffic data, wherein, the data bit of MIMO business is directly filled on MIMO traffic sub channels.
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