CN1984111A - Transmission and use for controlling information in OFDM system - Google Patents
Transmission and use for controlling information in OFDM system Download PDFInfo
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- CN1984111A CN1984111A CN 200610078355 CN200610078355A CN1984111A CN 1984111 A CN1984111 A CN 1984111A CN 200610078355 CN200610078355 CN 200610078355 CN 200610078355 A CN200610078355 A CN 200610078355A CN 1984111 A CN1984111 A CN 1984111A
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Abstract
The invention provides a method to control information transmission and its application in OFDM system, by dividing the control information, such as the TPS into different priority levels, modulate the different priority levels of control information with different priority level modulation, and make the different receiving effect for different priority level of control information such as TPS, in this way by dividing the relative importance control information as high-priority control information, relative unimportant control information as low-priority control information, and modulate the high-priority control information with high priority modulation, modulate the low-priority control information with low priority modulation, so that the discarded control information is often relative unimportant control information, ensure that the relative important control information can be received by the receiving terminal; thus implement the purpose to increase performance of receiving terminal in OFDM system.
Description
Technical field
The present invention relates to the network communications technology field, be specifically related to the transmission method of control information in a kind of ofdm system, the transmitting terminal network equipment and ofdm system in the ofdm system.
Background technology
OFDM (Orthogonal Frequency Division Multiplex, OFDM) technology is a kind of multi-carrier digital communications modulation technique, because OFDM has the higher availability of frequency spectrum and good anti-multipath interference performance, and by Europe and the Australian aspects such as broadband data communication, digital audio broadcasting, high definition digital television and WLAN (wireless local area network) that are applied to broadcast channel.OFDM also is counted as one of core technology of the 4th third-generation mobile communication.
The release of OFDM technology is in order to improve the spectrum of carrier utilance in fact, and the characteristics of OFDM are that each subcarrier is mutually orthogonal, and the frequency spectrum after the modulation can be overlapped, thereby avoid the phase mutual interference between subcarrier.
TPS (transmission parameter signal, transmission parameter signaling) is the signaling of the transmission parameter of special use, TPS can provide the signaling mechanism of a stalwartness, easy visit for system, TPS can make receiver find business quickly, even under the condition of low C/N (signal to noise ratio), demodulator still can obtain transmission parameter fast, and carries out correct data demodulates and decoding.
TPS is mainly used in the command transmitting parameter, and TPS is the signaling relevant with chnnel coding and modulation parameter.The information that TPS transmits is as shown in table 1.
Table 1
| Figure place | Explanation | |
| Transmission mode | 2 | Corresponding 2k, 4k, the transmission mode of 8k, 00 expression 2K, 01 expression 4K, 10 expression 8k. |
| Protection at interval | 2 | Protection ratio (00 correspondence, 1/4,01 correspondence, 1/8,10 correspondence 1/16) at interval. |
| Modulation system | 2 | 00 expression QPSK, 01 expression 16QAM, 10 expression 64QAM |
| Code rate | 2 | 00 expression, 1/2,01 expression, 2/3,10 expression 3/4 |
| Little distinctive emblem | 16 | Sub-district Id. |
| Frame number | 8 | The sequence number of certain frame in the expression superframe |
| The number of frame in the superframe | 8 | The number of frame in the expression superframe |
| Programme information | 24 | The program self-characteristic |
| Keep the position | 8 |
In the table 1, the information that TPS transmits comprises: the number of frame and sub-district sign etc. in the mapping mode of programme information, frame number, modulation constellation, encoder bit rate, protection interval, OFDM transmission mode, the superframe.
Transmitting terminal is when forming the OFDM symbol, and the first information that provides according to the control module of transmitting terminal is filled the TPS control signal in the OFDM symbol, after finishing this work, again user's data information is inserted remaining sub-carrier positions successively.
Receiving terminal obtains various Control Parameter and physical layer parameter by the TPS that receives, and the control module of notice receiving terminal, and part checking parameter and receiving terminal court verdict are compared.
Existing send mode based on TPS comprises the steps:
1, generate TPS according to control information, the TPS does not here have priority, and the priority of promptly all TPS is all identical.
2, TPS is encoded.
3, the TPS behind the coding is modulated.
4, insert the TPS signal according to the location map table of input in the respective sub position.
Existing receive mode based on the TPS signaling comprises the steps:
1, the signal that receives is reached channel estimating synchronously, and return TPS information.
2, TPS is separated constellation mapping and decoding.
3, decoded TPS is preserved, use for subsequent module.
Consider the importance of TPS, receiving terminal must solve the initial data of TPS accurately.Because the data volume of BPSK (two-phase PSK) and QPSK (quarternary phase-shift keying (QPSK)) modulation system transmission TPS is less than normal, so, transmit under a large amount of TPS data conditions at needs, need to consider the modulation system of 16QAM, even the modulation system of 64QAM.But,, can cause the transmission performance of system to descend if adopt 16QAM or 64QAM modulation system.
The importance of the information of the bit representative among the TPS itself is different, the information butt joint receiving end of some bit, it is unusual important parameters, must guarantee that high-performance receives, and some bit information is only as the terminal check data, its importance is relatively low, in existing TPS transmission method, transmitting terminal adopts the processing mode of putting on an equal footing to the bit information among the TPS, like this, may cause important relatively information dropout, and unessential relatively information can receive normally, thereby make the receptivity of receiving terminal poor.
Summary of the invention
The objective of the invention is to, transmission method, the transmitting terminal network equipment and the ofdm system of control information in a kind of ofdm system are provided, by control information being divided into different priority, different modulation systems is adopted in control information to different priorities, make the reception difference of the control information of the different priorities under the equal channel circumstance, thereby guaranteed that important relatively control information can be received proper normal the reception, has improved the receptivity of ofdm system receiving terminal.
For achieving the above object, the transmission method of control information in a kind of ofdm system provided by the invention, described method comprises step:
A, transmitting terminal are divided into different priorities with control information;
B, transmitting terminal are encoded respectively, are interweaved the control information of different priorities;
The modulation system that c, transmitting terminal adopt different priorities is modulated control information different priorities, behind the code interleaving;
D, the control information of transmitting terminal after modulation is inserted in the respective sub position, and be sent to receiving terminal.
Described control information is: information of carrying among the transmission parameter signaling TPS or system configuration information.
Described priority comprises two or more;
When described priority comprises: when two kinds of high priority and low priorities, the control information of high priority comprises: transmission mode, protection at interval, modulation system; code rate, the control information of low priority comprises: frame number, the number of frame in the superframe; programme information, little distinctive emblem keeps the position.
The step of among the described step b control information of different priorities being encoded respectively comprises:
Transmitting terminal adopts identical code rate to encode to the control information of different priorities; Perhaps transmitting terminal adopts different code rates to encode to the control information of different priorities;
The step that among the described step b control information of different priorities is interweaved respectively comprises:
Transmitting terminal adopts identical interleaving mode to interweave to the TP of different priorities; Perhaps transmitting terminal adopts different interleaving modes to interweave to the TP of different priorities.
Described step c comprises:
The 16QAM modulation system that transmitting terminal adopts different priorities is modulated control information different priorities, behind the code interleaving; Perhaps the transmitting terminal 64QAM modulation system that adopts different priorities is modulated control information different priorities, behind the code interleaving; Perhaps the transmitting terminal 256QAM modulation system that adopts different priorities is modulated control information different priorities, behind the code interleaving.
The invention provides the transmitting terminal network equipment in a kind of ofdm system, be provided with priority memory module, code interleaving module, modulation module and sending module in the described network equipment;
The priority memory module is used for: store each control information corresponding priorities information;
The code interleaving module is used for: according to priority memory module canned data the control information of different priorities is encoded respectively, interweaved, and the control information after will encoding, interweaving is sent to modulation module;
Modulation module is used for: the modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module;
Sending module is used for: corresponding sub-carrier positions is inserted in the control information after the modulation of its reception, and be sent to receiving terminal.
Described priority memory module canned data comprises:
Transmission mode, protection interval, modulation system, the corresponding relation of code rate and high priority; Frame number, the number of frame in the superframe, programme information, little distinctive emblem keeps the corresponding relation of position and low priority.
The code interleaving module adopts identical code rate that the control information of different priorities is encoded respectively, interweaved according to priority memory module canned data, and the control information after will encoding, interweaving is sent to modulation module; Perhaps the code interleaving module adopts different code rates that the control information of different priorities is encoded respectively, interweaved according to priority memory module canned data, and the control information after will encoding, interweaving is sent to modulation module.
Modulation module adopts different priorities according to priority memory module canned data 16QAM modulation system is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module; Perhaps the modulation module 64QAM modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module; Perhaps the modulation module 256QAM modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module.
The present invention also provides a kind of ofdm system, comprising: receiving terminal and transmitting terminal are provided with priority memory module, code interleaving module, modulation module and sending module in the network equipment of described transmitting terminal;
The priority memory module is used for: store each control information corresponding priorities information;
The code interleaving module is used for: according to priority memory module canned data the control information of different priorities is encoded respectively, interweaved, and the control information after will encoding, interweaving is sent to modulation module;
Modulation module is used for: the modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module;
Sending module is used for: corresponding sub-carrier positions is inserted in the control information after the modulation of its reception, and be sent to receiving terminal;
Receiving terminal is used for: the control information that receives is reached channel estimating synchronously, obtain synchronously and the control information after the channel estimating, and the control information that this obtains separated constellation mapping, then, deinterleaving and decoding processing are carried out in control information, and deinterleaving and decoded control information are used for receiving terminal.
Description by technique scheme as can be known, the present invention is by being divided into control information different priority, adopt the modulation system of different priorities to carry out modulation treatment to the control information of different priorities, make the reception difference of the control information of the different priorities under the equal channel circumstance, like this, by important relatively control information being divided into the control information of high priority, unessential relatively control information is divided into the control information of low priority, and adopt the modulation system of high priority to modulate to the control information of high priority, adopt the modulation system of low priority to modulate to the control information of low priority, make the unessential relatively often control information of the information that abandons, important relatively control information can normally be received; Control information among the present invention can be divided into two priority or plural priority according to actual needs, and the modulation among the present invention can be adopted 16QAM or modulation systems such as 64QAM or 256QAM; Thereby realized improving the purpose of receiving terminal receptivity by technical scheme provided by the invention.
Description of drawings
Fig. 1 is a realization TPS transmission principle schematic diagram of the present invention;
Fig. 2 is the hierarchical modulation schematic diagram of the TPS with different priorities of the embodiment of the invention.
Embodiment
The importance difference of the information of the different bit representatives among control information such as the TPS itself, if transmitting terminal can adopt different modulation treatment modes to the bit information of different importance among the TPS, can guarantee that then important relatively control information is received proper normal the reception, the information that abandons should be unessential relatively control information.
Control information among the present invention can for: the information of carrying among the TPS also can be system configuration information.System configuration information is as system's frequency, system bandwidth, system clock, systematic sampling frequency or the like.Be that example is described in detail technical scheme provided by the invention with the TPS transmission method below.
At the transmission flaws of TPS in the prior art, the realization principle of the TPS transmission method that the present invention proposes as shown in Figure 1.
In Fig. 1, informational needs among the TPS is divided into different priority, the information that comprises among TPS should have identical priority, the TPS of different priorities is after handling through code interleaving, the present invention just can adopt the modulation system of different priorities to carry out modulation treatment to the TPS of different priorities, promptly TPS is carried out hierarchical modulation, the TPS after the hierarchical modulation is sent to receiving terminal after carrying out the framing processing.Like this, the present invention can make the reception difference of TPS under equal channel circumstance of different priorities, thereby makes the TPS of high priority can have good reception, can normally be received to guarantee important information.
The present invention can be with control information, and the information that promptly present TPS comprises is divided into two different priority, certainly, also the information that present TPS comprises can be divided into plural different priorities.The principle that control information is divided into different priorities is: the importance of control information.That is to say, make information important relatively in the control information have high-grade priority, make that unessential relatively information has low-grade priority in the control information.
Be example control information is divided into two priority below, the 2 pairs of methods provided by the invention and the transmitting terminal network equipment describe in conjunction with the accompanying drawings.
In Fig. 2, at first, transmitting terminal need be according to the importance of control information; control information is divided into: high priority control information and low priority control information; high priority message can comprise: transmission mode, protection interval, modulation system; code rate etc.; low priority information can comprise: frame number, the number of frame in the superframe, programme information; little distinctive emblem keeps position etc.
After the priority of having distinguished control information, transmitting terminal need transmit the information of different priorities by different TPS, like this, TPS has also just had different priority, the TPS that promptly carries high priority message is high priority TPS, and the TPS that carries low priority information is low priority TPS.
Because control information in this embodiment is divided into high priority control information and low priority control information, like this, the composition of high priority TPS can comprise following content:
Transmission mode: 2,00 expression 2k, 01 expression 4k, 10 expression 8k;
The protection interval: 2,00 expression, 1/4,01 expression, 1/8,10 expression 1/16;
Modulation system: 2,00 expression QPSK, 01 expression 16QAM, 10 expression 64QAM;
Code rate: 2,00 expression, 1/2,01 expression, 2/3,10 expression 3/4;
The composition of low priority TPS can comprise following content:
Frame number: 8, the sequence number of expression frame;
The number of frame in the superframe: 8, represent the number of frame in the superframe;
Programme information: 24, expression program self-characteristic;
Little distinctive emblem: 16, expression sub-district ID;
Keep the position: 8.
Behind the TPS that has generated different priorities, transmitting terminal need carry out encoding process respectively to the TPS of different priorities.In the present invention, the TPS of different priorities can adopt identical code rate, also can adopt different code rates, can adopt 1/2 or 2/3 or 3/4 code rate as the TPS of high priority, the TPS of low priority can adopt 1/2 or 2/3 or 3/4 code rate equally.
After the TPS to different priorities encodes, transmitting terminal need carry out interleaving treatment to the TPS of the different priorities behind the coding, interweaving here can be adopted convolutional interleave, also can symbolization interweave, and the TPS of different priorities can adopt identical interleaving treatment mode, also can adopt different interleaving treatment modes.
Carried out after the interleaving treatment at the TPS to different priorities, transmitting terminal need adopt different modulation systems to modulate to the TPS of the different priorities after interweaving.That is to say, the TPS of the different priorities of transmitting terminal after with interleaving treatment is mapped to a kind of different bits of constellation symbol of modulation system, be mapped to the different bits of 16QAM constellation symbol as TPS with different priorities, be mapped to the different bits of 64QAM constellation symbol as TPS, be mapped to the different bits of 256QAM constellation symbol etc. as TPS different priorities with different priorities.Here, the TPS of high priority should be mapped to the higher bit position of modulation system, and the TPS of low priority should be mapped to the low bit of modulation system.
When the modulation system that adopts 16QAM is modulated the TPS of different priorities, should be mapped as the higher bit position of 16QAM modulation system for the TPS of high priority, that is to say that the QPSK modulation system that adopts high priority is modulated the TPS of high priority; Should be mapped as the low bit of 16QAM modulation system for the TPS of low priority, that is to say, the QPSK modulation system that adopts low priority is modulated the TPS of low priority.By above-mentioned modulation, the present invention can make the TPS of different priorities be mapped on the different layers of 16QAM, thereby has realized hierarchical modulation.
The present invention is not limited to 16QAM, 64QAM and the 256QAM modulation system of foregoing description to the modulation system of different priorities TPS.
After having carried out above-mentioned modulation, transmitting terminal can be inserted the TPS signal in the respective sub position according to the location map table, and like this, the TPS of different priorities just can be sent to receiving terminal by subcarrier.
The TPS with different priorities that receiving terminal can adopt existing receive mode based on TPS to come receiving end/sending end to send, the method that receiving terminal receives TPS can comprise the steps:
Step 1, receiving terminal reach channel estimating synchronously to the signal that receives, and obtain the TPS information after synchronous and the channel estimating.
To step 2, receiving terminal to obtain synchronously and the TPS information after the channel estimating separate constellation mapping.
To step 3, receiving terminal TPS is carried out deinterleaving and decoding processing.
To step 4, receiving terminal decoded TPS is preserved, use for subsequent module.
Disturb and noise owing to exist in the actual transmissions process, so, after the TPS signal that the above-mentioned hierarchical modulation of process is finished transmitted through actual channel, its constellation point position can change, and some constellation point may be close, close constellation point is judged by accident easily, Euclidean distance between the constellation point is big more, and the probability of erroneous judgement is more little, that is to say, Euclidean distance between the constellation point is big more, and the antijamming capability of TPS information is strong more.
Because the Euclidean distance of the QPSK modulation system correspondence of high priority is big, the Euclidean distance of the QPSK modulation system correspondence of low priority is little, so, TPS after the hierarchical modulation has different antijamming capabilities, the TPS signal that is high priority has higher antijamming capability, and the TPS signal of low priority has lower antijamming capability.
The TPS transmission method that the foregoing description is described can extend to 64QAM, 256QAM modulation system etc., as when adopting the 64QAM modulation system, can adopt the high priority QPSK of 64QAM to modulate to the TPS of high priority, can adopt the low priority QPSK of 64QAM to modulate the TPS of low priority.The basic principle of its realization is identical with the realization principle of above-mentioned employing 16QAM modulation system, is not described in detail at this.
Also have, the foregoing description is to be example with high priority and two priority levels of low priority, and the transmission course of TPS is described.TPS priority among the present invention also can be divided into plural priority, as TPS is divided into high priority, medium priority, three priority of low priority etc., when TPS is divided into three kinds of different priority, the TPS of three kinds of different priorities should modulate by the modulation system of different priorities, can adopt the high priority QPSK mode of 64QAM to modulate as TPS to high priority, TPS to medium priority can adopt the medium priority QPSK mode of 64QAM to modulate, TPS to low priority can adopt the low priority QPSK mode of 64QAM to modulate, in like manner, foregoing description can extend to the 256QAM modulation system.
Description by technique scheme as can be known, transmitting terminal of the present invention is divided into high priority message and low priority information by the information that present TPS is comprised, and the information of different priorities is modulated by the modulation system of different priorities, guaranteed that the reception of high priority message under equal channel circumstance is better than the reception of low priority information, like this, transmitting terminal after adopting TPS transmission method of the present invention, the receptivity the when receptivity that can guarantee receiving terminal is better than not using hierarchical modulation at present.
The TPS transmission method with different priorities of OFDM provided by the invention (Orthogonal Frequency Division Multiplex, OFDM) system is applicable to all-environment data communication systems such as ground, satellite.
The foregoing description is that example is described with TPS, and the transmitting terminal in the ofdm system is when sending other control informations such as system configuration information, and it realizes that principle and specific implementation process and foregoing description are basic identical, is not described in detail at this.
Be provided with priority memory module, code interleaving module, modulation module and sending module in the TPS transmitting terminal network equipment in the ofdm system provided by the invention.
The priority memory module is mainly used in each control information corresponding priorities information of storage, promptly stores the corresponding relation of control information and priority level, as storing each information of carrying among the TPS and the corresponding relation of priority level etc.The priority of control information is to determine according to the significance level of this information.Control information stored can be divided into two kinds of different priority in the priority memory module, certainly, also can be divided into plural different priorities.When canned data in the priority memory module is divided into the different priority of two kinds of high priority and low priorities; high priority message can comprise: transmission mode; protection at interval; modulation system, code rate etc., low priority information can comprise: frame number; the number of frame in the superframe; programme information, little distinctive emblem keeps position etc.That is to say, store transmission mode in the priority memory module, protection at interval, modulation system, the corresponding relation of code rate and high priority, and frame number, the number of frame in the superframe, programme information, little distinctive emblem keeps the corresponding relation with low priority.Concrete as the description in the above-mentioned method.
The code interleaving module is mainly used in: the control information such as the TPS of the different priorities that the transmitting terminal needs is sent according to priority memory module canned data encodes respectively, interleaving treatment.Here, the code interleaving module can adopt different code rates to encode to the TPS of different priorities, also can adopt identical code rate to encode to the TPS of different priorities, and, the code interleaving module can adopt different interleaving modes to carry out interleaving treatment to the TPS of different priorities, also can adopt identical interleaving mode to handle to the TPS of different priorities, concrete as the description in the above-mentioned method.TPS after the code interleaving module will be encoded, be interweaved is sent to modulation module.
Modulation module is mainly used in: the modulation system that adopts different priorities according to priority memory module canned data is modulated control information such as TPS different priorities, behind the code interleaving, and the TPS after will modulating is sent to sending module.Modulation module has realized the TPS of different priorities is carried out the function of hierarchical modulation to the modulator approach of TPS.
The 16QAM modulation system that modulation module can adopt different priorities according to priority memory module canned data is to different priorities, control information such as TPS behind the code interleaving modulate, and the TPS after will modulating is sent to sending module, it is the higher bit position that modulation module should be mapped as the TPS of high priority the 16QAM modulation system, the TPS of low priority should should be mapped as the low bit of 16QAM modulation system, that is to say, the QPSK modulation system that modulation module should adopt high priority is modulated the TPS of high priority, and the QPSK modulation system that should adopt low priority is modulated the TPS of low priority.By above-mentioned modulated process, modulation module enough makes the TPS of different priorities be mapped on the different layers of 16QAM, thereby has realized hierarchical modulation.Certainly, the 64QAM modulation system that modulation module can also adopt different priorities according to priority memory module canned data is modulated TPS different priorities, behind the code interleaving, and the TPS after will modulating is sent to sending module, equally, the 256QAM modulation system that modulation module can also adopt different priorities according to priority memory module canned data is modulated TPS different priorities, behind the code interleaving, and the TPS after will modulating is sent to sending module.Concrete as the description in the above-mentioned method.
Sending module is mainly used in: corresponding sub-carrier positions is inserted in control information after the modulation of its reception such as TPS, and be sent to receiving terminal.Because the Euclidean distance of the QPSK modulation system correspondence of high priority is big, the Euclidean distance of the QPSK modulation system correspondence of low priority is little, so, the TPS that sending module sends has different antijamming capabilities, the TPS signal that is high priority has higher antijamming capability, and the TPS signal of low priority has lower antijamming capability.Like this, receiving distolaterally, the TPS of high priority can have good reception, has guaranteed that important relatively information can normally be received, the unessential relatively often information of the information that is dropped, thus improved the receptivity of receiving terminal.
Ofdm system provided by the invention comprises: receiving terminal and transmitting terminal.Be provided with priority memory module, code interleaving module, modulation module and sending module in the transmitting terminal network equipment here, these four concrete operations that module is done of transmitting terminal, the description as among the above-mentioned embodiment is not described in detail at this.
Receiving terminal can adopt existing multiple method of reseptance that control information such as the TPS signal that transmitting terminal sends received processing, at first the TPS signal that receives is reached channel estimating synchronously as receiving terminal, and obtains the TPS information after synchronous and the channel estimating.Secondly, receiving terminal is separated constellation mapping to the above-mentioned TPS information of obtaining, and then, receiving terminal carries out deinterleaving and decoding processing to TPS, and is last, and the TPS of receiving terminal after with deinterleaving and decoding processing preserves, for the subsequent module use of receiving terminal.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (10)
1, the transmission method of control information in a kind of ofdm system is characterized in that, comprising:
A, transmitting terminal are divided into different priorities with control information;
B, transmitting terminal are encoded respectively, are interweaved the control information of different priorities;
The modulation system that c, transmitting terminal adopt different priorities is modulated control information different priorities, behind the code interleaving;
D, the control information of transmitting terminal after modulation is inserted in the respective sub position, and be sent to receiving terminal.
2, the transmission method of control information in a kind of ofdm system as claimed in claim 1 is characterized in that described control information is: information of carrying among the transmission parameter signaling TPS or system configuration information.
3, the transmission method of control information in a kind of ofdm system as claimed in claim 1 or 2 is characterized in that described priority comprises two or more;
When described priority comprises: when two kinds of high priority and low priorities, the control information of high priority comprises: transmission mode, protection at interval, modulation system; code rate, the control information of low priority comprises: frame number, the number of frame in the superframe; programme information, little distinctive emblem keeps the position.
4, the transmission method of control information in a kind of ofdm system as claimed in claim 1 or 2 is characterized in that:
The step of among the described step b control information of different priorities being encoded respectively comprises:
Transmitting terminal adopts identical code rate to encode to the control information of different priorities; Perhaps transmitting terminal adopts different code rates to encode to the control information of different priorities;
The step that among the described step b control information of different priorities is interweaved respectively comprises:
Transmitting terminal adopts identical interleaving mode to interweave to the TP of different priorities; Perhaps transmitting terminal adopts different interleaving modes to interweave to the TP of different priorities.
5, the transmission method of control information in a kind of ofdm system as claimed in claim 1 or 2 is characterized in that described step c comprises:
The 16QAM modulation system that transmitting terminal adopts different priorities is modulated control information different priorities, behind the code interleaving; Perhaps the transmitting terminal 64QAM modulation system that adopts different priorities is modulated control information different priorities, behind the code interleaving; Perhaps the transmitting terminal 256QAM modulation system that adopts different priorities is modulated control information different priorities, behind the code interleaving.
6, the transmitting terminal network equipment in a kind of ofdm system is characterized in that, is provided with priority memory module, code interleaving module, modulation module and sending module in the described network equipment;
The priority memory module is used for: store each control information corresponding priorities information;
The code interleaving module is used for: according to priority memory module canned data the control information of different priorities is encoded respectively, interweaved, and the control information after will encoding, interweaving is sent to modulation module;
Modulation module is used for: the modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module;
Sending module is used for: corresponding sub-carrier positions is inserted in the control information after the modulation of its reception, and be sent to receiving terminal.
7, the transmitting terminal network equipment in a kind of ofdm system as claimed in claim 6 is characterized in that, described priority memory module canned data comprises:
Transmission mode, protection interval, modulation system, the corresponding relation of code rate and high priority;
Frame number, the number of frame in the superframe, programme information, little distinctive emblem keeps the corresponding relation of position and low priority.
8, the transmitting terminal network equipment in a kind of ofdm system as claimed in claim 6, it is characterized in that: the code interleaving module adopts identical code rate that the control information of different priorities is encoded respectively, interweaved according to priority memory module canned data, and the control information after will encoding, interweaving is sent to modulation module; Perhaps the code interleaving module adopts different code rates that the control information of different priorities is encoded respectively, interweaved according to priority memory module canned data, and the control information after will encoding, interweaving is sent to modulation module.
9, as the TPS transmitting terminal network equipment in claim 6 or the 7 or 8 described a kind of ofdm systems, it is characterized in that:
Modulation module adopts different priorities according to priority memory module canned data 16QAM modulation system is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module; Perhaps the modulation module 64QAM modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module; Perhaps the modulation module 256QAM modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module.
10, a kind of ofdm system based on claim 5 comprises: receiving terminal and transmitting terminal, it is characterized in that, and be provided with priority memory module, code interleaving module, modulation module and sending module in the network equipment of described transmitting terminal;
The priority memory module is used for: store each control information corresponding priorities information;
The code interleaving module is used for: according to priority memory module canned data the control information of different priorities is encoded respectively, interweaved, and the control information after will encoding, interweaving is sent to modulation module;
Modulation module is used for: the modulation system that adopts different priorities according to priority memory module canned data is modulated control information different priorities, behind the code interleaving, and the control information after will modulating is sent to sending module;
Sending module is used for: corresponding sub-carrier positions is inserted in the control information after the modulation of its reception, and be sent to receiving terminal;
Receiving terminal is used for: the control information that receives is reached channel estimating synchronously, obtain synchronously and the control information after the channel estimating, and the control information that this obtains separated constellation mapping, then, deinterleaving and decoding processing are carried out in control information, and deinterleaving and decoded control information are used for receiving terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610078355 CN1984111A (en) | 2006-05-11 | 2006-05-11 | Transmission and use for controlling information in OFDM system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610078355 CN1984111A (en) | 2006-05-11 | 2006-05-11 | Transmission and use for controlling information in OFDM system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1984111A true CN1984111A (en) | 2007-06-20 |
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| CN101911577A (en) * | 2007-10-29 | 2010-12-08 | 爱立信电话股份有限公司 | Control channel formulation in OFDM systems |
| WO2011109933A1 (en) * | 2010-03-09 | 2011-09-15 | 上海贝尔股份有限公司 | Method and apparatus for feeding back channel information in mimo wireless communication system |
| CN101350697B (en) * | 2007-07-19 | 2011-11-16 | 富士通株式会社 | Apparatus and method for mapping symbol interleaving channel and mobile communication system |
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| CN101582751B (en) * | 2009-06-16 | 2012-06-20 | 清华大学 | Transmission method of orthogonal extension block, receiving method thereof and system thereof |
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| WO2013023599A1 (en) * | 2011-08-17 | 2013-02-21 | 北京泰美世纪科技有限公司 | Method and device for sending and receiving layered service stream |
| CN103327333A (en) * | 2013-06-20 | 2013-09-25 | 北京邮电大学 | Method for improving reconstruction quality and transmission rate of video |
| CN103327333B (en) * | 2013-06-20 | 2016-10-05 | 北京邮电大学 | A kind of method improving video reconstruction quality and transfer rate |
| CN104811410A (en) * | 2014-01-26 | 2015-07-29 | 上海数字电视国家工程研究中心有限公司 | Construction method, transmitting method and demodulation method of physical frames |
| CN104811410B (en) * | 2014-01-26 | 2018-05-04 | 上海数字电视国家工程研究中心有限公司 | Construction method, sending method and the demodulation method of physical frame |
| CN106162893A (en) * | 2015-04-17 | 2016-11-23 | 瑞昱半导体股份有限公司 | The control circuit of wireless user equipment |
| CN106162893B (en) * | 2015-04-17 | 2019-11-01 | 瑞昱半导体股份有限公司 | The control circuit of wireless user equipment |
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