CN105282085B

CN105282085B - Decoding method and equipment

Info

Publication number: CN105282085B
Application number: CN201410351207.3A
Authority: CN
Inventors: 宋欢欢; 文红; 唐杰
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-07-22
Filing date: 2014-07-22
Publication date: 2018-11-16
Anticipated expiration: 2034-07-22
Also published as: CN105282085A

Abstract

The embodiment of the present invention provides decoding method and equipment, including：The first modulated signal set Jing Guo M-ary orthogonal amplitude modulation is obtained, wherein the first modulated signal set includes P modulated signal, which meets Gray and modulate mapping ruler；K modulated signal is determined from the P modulated signal；Determine K M signal for corresponding to the K modulated signal, the bit that each M signal maps on planisphere and the corresponding modulated signal bit mapped on the planisphere are completely different；K deformation signal is determined by decision statistic formula according to the K M signal and channel matrix；Determine the first variant matrix for corresponding to the first modulated signal set, wherein the first variant matrix includes L deformation signal in the K deformation signal.Above-mentioned technical proposal can be effectively protected the Content of Communication of legal communicating pair.

Description

Decoding method and equipment

Technical field

The present embodiments relate to wireless communication technology fields, and more particularly, to decoding method and equipment.

Background technique

Wireless communication technique is popularized so that the more next convenience of the communication of person to person.But wireless communication technique is assigning user Also there is some potential safety problems while freedom of correspondence.The broadcast characteristic of wireless communication makes wireless network not have physics side Boundary, this allows for being more easier the eavesdropping of wireless communication content.Listener-in can also lead to other than it can eavesdrop Content of Communication The identity information for crossing hijack legitimate user, the legitimate user that disguises oneself as obtain underground information service, or distort information to reach To the purpose for destroying wireless service.Therefore, how to carry out encryption to the Content of Communication of communicating pair is that this field needs to solve Major issue.

Traditional secure transport mechanism is to rely on upper layer cipher mechanism, and the principle of design is can not to break spy based on calculating Property.But with the development of computer technology, the performance of computer is higher and higher.This results in needing key length to be sharing Increasingly longer, the time of key distribution is consequently increased, and the complexity calculated using cipher key pair communication content can also improve. Meanwhile the performance of different wireless communication terminals is different.For example, the data processing of the wireless communication terminals such as mobile phone or tablet computer Ability is well below portability computer.Therefore it cannot be guaranteed that same complicated key is suitable for all types of wireless communications eventually End.

Summary of the invention

The embodiment of the present invention provides decoding method and equipment, can be effectively protected in the communication of legal communicating pair Hold.

In a first aspect, the embodiment of the present invention provides a kind of coding method, this method includes：It obtains and shakes by M-ary orthogonal First modulated signal set of width modulation, wherein the first modulated signal set includes P modulated signal, the P modulated signal Meet Gray and modulates mapping ruler；K modulated signal is determined from the P modulated signal, wherein K is just less than or equal to P Integer；Determine K M signal for corresponding to the K modulated signal, the bit that each M signal maps on planisphere It is completely different with the corresponding modulated signal bit mapped on the planisphere；According to the K M signal and channel matrix, By decision statistic formula, K deformation signal is determined；Determine the first variant square for corresponding to the first modulated signal set Battle array, wherein the first variant matrix includes L deformation signal in the K deformation signal, and wherein L is less than or equal to K's Positive integer.

With reference to first aspect, in the first possible implementation of the first aspect, it is determined from the P modulated signal Before K modulated signal, this method further includes：The coding-control indicator sequence prestored is read, determines current indicated value；It should be from this K modulated signal is determined in P modulated signal, including：In the case where determining the current indicated value is the first value, from the P The K modulated signal is determined in modulated signal.

The possible implementation of with reference to first aspect the first, in second of possible implementation of first aspect In, this method further includes：Obtain the second modulated signal set Jing Guo the M-ary orthogonal amplitude modulation, second modulated signal Set includes Q modulated signal, which meets Gray and modulate mapping ruler；The coding-control prestored is read to refer to Show sequence, determines current indicated value；In the case that determine the current indicated value be second value, to the second modulated signal set into Row Orthogonal Space-Time Block Code determines the second regular code matrix for corresponding to the second modulated signal set.

Second aspect, the embodiment of the present invention provide a kind of coding/decoding method, and this method includes：It obtains first and receives signal collection It closes；The first reception signal set is decoded, determines the first estimation signal set, wherein the first estimation signal set packet Include P first estimation signal；Restoring operation is carried out to K first estimation signal in the P first estimation signal, obtains K Recovering signal, the restoring operation are to take to each bit of each first estimation signal in the K first estimation signal Different, K is the positive integer less than or equal to P；Determine the corresponding first object estimation signal set of the first estimation signal set, it should First object estimation signal set includes the K recovering signal and (P-K) a first estimation signal for not carrying out the restoring operation.

In conjunction with second aspect, in the first possible implementation of the second aspect, the P second processing signal is determined In K deformation signal before, this method further includes：The coding-control indicator sequence prestored is read, determines current indicated value；It should Determine K deformation signal in the P second processing signal, including：It is right when determining the current indicated value is the first value The K first estimation signal in the P first estimation signal carries out the restoring operation.

In conjunction with the first possible implementation of second aspect, in second of possible implementation of second aspect In, this method further includes：It obtains second and receives signal set；The second reception signal set is decoded, determines that second estimates Signal set is counted, wherein the second estimation signal set includes Q second estimation signal；Read the coding-control prestored instruction Sequence determines current indicated value；In the case where determining the current indicated value is second value, the second estimation signal set is determined Corresponding second target state estimator signal set includes the Q second estimation signal.

The third aspect, the embodiment of the present invention provide a kind of equipment, which includes：Acquiring unit, for obtaining through excessive First modulated signal set of ary quadrature amplitude modulation, wherein the first modulated signal set includes P modulated signal, the P A modulated signal meets Gray and modulates mapping ruler；Determination unit, for determining K modulated signal from the P modulated signal, Wherein K is the positive integer less than or equal to P；The determination unit is also used to determine corresponding among K of the K modulated signal Signal, the bit that the bit that each M signal maps on planisphere maps on the planisphere with corresponding modulated signal Position is completely different；The determination unit is also used to, by decision statistic formula, be determined according to the K M signal and channel matrix K deformation signal；The determination unit is also used to determining the first variant matrix for corresponding to the first modulated signal set, In the first variant matrix include L deformation signal in the K deformation signal, wherein L is just whole less than or equal to K Number.

In conjunction with the third aspect, in the first possible implementation of the third aspect, which is also used to read The coding-control indicator sequence prestored, determines current indicated value；The determination unit, specifically for deserving in acquiring unit determination In the case that preceding indicated value is the first value, the K modulated signal is determined from the P modulated signal.

In conjunction with the first possible implementation of the third aspect, in second of possible implementation of the third aspect In, which is also used to obtain the second modulated signal set by the M-ary orthogonal amplitude modulation, second modulation Signal set includes Q modulated signal, which meets Gray and modulate mapping ruler；The acquiring unit is also used to read The coding-control indicator sequence for taking this to prestore, determines current indicated value；The determination unit, being also used to determine in the acquiring unit should In the case that current indicated value is second value, Orthogonal Space-Time Block Code is carried out to the second modulated signal set, determines and corresponds to In the second regular code matrix of the second signal set.

Fourth aspect, the embodiment of the present invention provide a kind of equipment, which includes：Acquiring unit connects for obtaining first Receive signal set；Decoding unit, for this first reception signal set be decoded, determine the first estimation signal set, In the first estimation signal set include P the first estimation signal；Determination unit, for the K in the P first estimation signal A first estimation signal carries out restoring operation, obtains K recovering signal, which is in the K first estimation signal Each bit of each first estimation signal take different, K is positive integer less than or equal to P；The determination unit, is also used to Determine that the corresponding first object estimation signal set of the first estimation signal, first object estimation signal set include K and go back Original signal and (P-K) a first estimation signal to carry out the restoring operation.

In conjunction with fourth aspect, in the first possible implementation of the fourth aspect, which is also used to read The coding-control indicator sequence prestored, determines current indicated value；The determination unit is specifically used for determining in the acquiring unit and dispatch In the case that current indicated value is the first value, reduction behaviour is carried out to the K first estimation signal in the P first estimation signal Make.

In conjunction with the first possible implementation of fourth aspect, in second of possible implementation of fourth aspect In, which is also used to obtain the second reception signal set；The decoding unit is also used to the second reception signal collection Conjunction is decoded, and determines the second estimation signal set, and wherein the second estimation signal set includes Q second estimation signal；It should Acquiring unit is also used to read the coding-control indicator sequence prestored, determines current indicated value；The determination unit, is also used to In the case where acquiring unit determines that the current indicated value is second value, corresponding second mesh of the second estimation signal set is determined Mark estimation signal set includes the Q second estimation signal.

In above-mentioned technical proposal, sending ending equipment can send the first variant matrix by more antennas.By this One modulated signal set is encoded to obtain the strategy of the first variant matrix, legal receiving device can to this One variant matrix is accurately decoded, and obtains the modulated signal in the first modulated signal set, and to the tune got Signal processed is demodulated.But illegal receiving device and it is unaware of how the first variant matrix obtains, therefore non- The receiving device of method can not accurately decode the first variant matrix, thus can not be by the first variant matrix also It originally was the first modulated signal set before coding.Therefore, above-mentioned technical proposal can be effectively protected legal communicating pair Content of Communication.

Detailed description of the invention

In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention Attached drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.

Fig. 1 is the schematic flow chart of the coding method provided according to embodiments of the present invention.

Fig. 2 is the schematic flow chart of another coding method provided according to embodiments of the present invention.

Fig. 3 is a kind of planisphere of the modulated signal of 16QAM for meeting gray mappings rule.

Fig. 4 is the schematic flow chart of the coding/decoding method provided according to embodiments of the present invention.

Fig. 5 is the schematic flow chart of another coding/decoding method provided according to embodiments of the present invention.

Fig. 6 is the structural block diagram of the equipment provided according to embodiments of the present invention.

Fig. 7 is the structural block diagram of another equipment provided according to embodiments of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that the embodiment described is a part of the embodiments of the present invention, rather than whole embodiments.Based on the present invention In embodiment, those of ordinary skill in the art's every other implementation obtained without making creative work Example, all should belong to the scope of protection of the invention.

Method provided by the embodiment of the present invention can be applied to multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) system, for example, can be applied to four hairs one receives the mimo system of half code rate, four hairs n_RReceive the mimo system of half code rate, four hairs one receive code rate mimo system, four hair n_RThe mimo system etc. of code rate is received, Wherein n_RFor positive integer.

Equipment (i.e. sending ending equipment and receiving device) in the embodiment of the present invention can be the mobile end for supporting MIMO (Mobile Terminal, MT), mobile subscriber equipment etc., such as the equipment is held to can be portable, pocket, hand-held, meter Built in calculation machine or vehicle-mounted mobile device.The equipment may also mean that the base station for supporting MIMO, access point (Access Point) etc..

Fig. 1 is the schematic flow chart of the coding method provided according to embodiments of the present invention.Method shown in FIG. 1 is by MIMO Sending ending equipment in system executes.

101, obtain by M-ary orthogonal amplitude modulation (M-ary Quadrature Amplitude Modulation, M-QAM) the first modulated signal set modulated, wherein the first modulated signal set includes P modulated signal, this P modulation Signal meets Gray and modulates mapping ruler.

102, K modulated signal is determined from the P modulated signal, wherein K is the positive integer less than or equal to P.

103, it determines K M signal for corresponding to the K modulated signal, is mapped on planisphere in each M signal Bit and the corresponding modulated signal bit mapped on the planisphere it is completely different.

104, K deformation signal is determined by decision statistic formula according to the K M signal and channel matrix.

105, determine the first variant matrix for corresponding to the first modulated signal set, wherein the first variant matrix Including L deformation signal in the K deformation signal, L is the positive integer less than or equal to K.

Method according to figure 1, sending ending equipment can send the first variant matrix by more antennas.It should First modulated signal set is encoded, and to obtain the strategy of the first variant matrix, legal receiving device can be to this First variant matrix is accurately decoded, obtain the modulated signal in the first modulated signal set, and to getting Modulated signal is demodulated.But illegal receiving device and it is unaware of how the first variant matrix obtains, therefore Illegal receiving device can not accurately decode the first variant matrix, thus can not be by the first variant matrix The first modulated signal set before being reduced to coding.Therefore, method shown in FIG. 1 can be effectively protected legal communicating pair Content of Communication.

Fig. 2 is the schematic flow chart of another coding method provided according to embodiments of the present invention.Method shown in Fig. 2 by Sending ending equipment in multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) system executes.

201, the first modulated signal set by M-QAM modulation is obtained, wherein the first modulated signal set includes P Modulated signal, the P modulated signal meet Gray and modulate mapping ruler.

Those skilled in the art are it is recognised that in order to guarantee that receiving device receives the best performance of signal, in M-QAM tune P modulated signal being made meets Gray and modulates mapping ruler, i.e., each modulated signal on planisphere in the P modulated signal Hamming distance with adjacent modulated signal is 1.In other words, the corresponding bit of adjacent modulation signal only one it is different.

202, the coding-control indicator sequence prestored is read, determines current indicated value.

203, in the case where determining the current indicated value is the first value, K modulation letter is determined from the P modulated signal Number, wherein K is the positive integer less than or equal to P.

204, determine K M signal for corresponding to the K modulated signal, letter among each of the K M signal Number bit mapped on planisphere and the corresponding modulated signal bit mapped on the planisphere are completely different.Due to The Hamming distance of each modulated signal and adjacent modulated signal is 1, therefore each M signal and corresponding modulated signal Hamming distance is maximum under identical circumstances.In this way, the signal that illicit reception end can be made to get when being eavesdropped Error probability maximizes.

Fig. 3 is a kind of planisphere of the modulated signal of 16QAM for meeting gray mappings rule.As shown in figure 3,4 modulation Signal x₁、x₂、x₃And x₄Position on planisphere is respectively 1110,1010,1111 and 1011.In the case, correspond to x₁、 x₂、x₃And x₄4 M signals WithPosition on the planisphere is respectively 0001,0101,0000 and 0100.As can be seen that each M signal is maximum under identical circumstances with the Hamming distance of corresponding modulated signal.

205, K deformation signal is determined by decision statistic formula according to the K M signal and channel matrix.

Specifically, which can be sending ending equipment oneself determination, be also possible to true by receiving device The sending ending equipment is sent to after fixed.

206, determine the first variant matrix for corresponding to the first modulated signal set, wherein the first variant matrix Including L deformation signal in the K deformation signal, L is the positive integer less than or equal to K.

It is understood that the decision statistic formula is determined according to the decision statistic formula of orthogonal space time packet. Therefore, the matrix that identical modulated signal obtain after Orthogonal Space-Time Block Code is known for sending ending equipment.Also, The first variant matrix carries out on the matrix form obtained after Orthogonal Space-Time Block Code with to the first modulated signal set It is similar.It is to be understood that sending ending equipment can before determine the first variant matrix, and and it is non-required first to this One modulated signal set be somebody's turn to do after orthogonal space-time block codes obtain corresponding regular code matrix further according to the regular code matrix is determining First variant matrix.

207, the second modulated signal set by M-QAM modulation is obtained, which includes Q tune Signal processed, the Q modulated signal meet Gray and modulate mapping ruler.

It is similar with the first signal set, in order to guarantee that receiving device receives the best performance of signal, modulated in M-QAM To the Q modulated signal meet Gray and modulate mapping ruler, i.e., each modulated signal and adjacent tune in the Q modulated signal The Hamming distance of signal processed is 1.

208, the coding-control indicator sequence prestored is read, determines current indicated value.

209, in the case where determining the current indicated value is second value, it is orthogonal that this is carried out to the second modulated signal set Space-time block code determines the second regular code matrix for corresponding to the second modulated signal set.

It is appreciated that in " current " in the current indicated value in step 202 and the current indicated value in step 208 " current " is not synchronization.For example, if the first modulated signal set was obtained at the first moment, step 202 In current indicated value in " current " refer to " current " corresponding to the first moment.If the second modulated signal set be What the second moment obtained, then " current " in the current indicated value in step 208 refers to " current " corresponding to the second moment.

The coding-control indicator sequence can be the sequence being made of " 1 " " 0 ", and " 1 " can be first value, " 0 " It can be the second value.Sending ending equipment and receiving device preserve the coding-control indicator sequence, and both sides save Coding-control indicator sequence is identical.

For the convenience of description, the coding staff that will determine the variant matrix of modulated signal set by obtaining variant below Method referred to as deforms space-time block code.

Method according to Fig.2, sending ending equipment can be selected by the different indicated values of coding-control indicator sequence Different coding methods encodes the modulated signal set got.Different indicated values in the coding-control indicator sequence It is stored in legal communicating pair (i.e. legal sending ending equipment and legal receiving device) simultaneously.Therefore, legal to connect Receiving end equipment is known that legal sending ending equipment is to carry out using which kind of coding method to the signal in modulation signal set Coding.But illegal receiving device is not aware that and sends the coding-control indicator sequence.Therefore, illegal receiving device Do not know signal transmitted by sending ending equipment using deformation space-time block code or Orthogonal Space-Time Block Code.Together When, sending ending equipment can send the first variant matrix by more antennas.The first modulated signal set is compiled Code is well known for legitimate correspondence both sides with the strategy for obtaining the first variant matrix.In this way, legal receiving device The first variant matrix can accurately be decoded, obtain the modulated signal in the first modulated signal set, and right The modulated signal got is demodulated.But illegal receiving device and it is unaware of the first variant matrix is how to obtain , therefore illegal receiving device can not accurately decode the first variant matrix, thus can not be by first Variant matrix is reduced to the first modulated signal set before coding.In conclusion legal communicating pair uses two layers of machine System (coding-control indicator sequence and deformation space-time block code) protects Content of Communication, so that illegal receiving device The probability being correctly decoded substantially reduces, and can effectively ensure that the safety of Content of Communication.

It is understood that the first modulated signal set and " first " and " second " in the second modulated signal set are only In order to distinguish different modulated signal set, not to the limitation of modulation signal set.For example, if receiving the first modulation letter After number set, the current indicated value of the coding-control indicator sequence of acquisition is second value, then to the first modulated signal set into Row Orthogonal Space-Time Block Code.If after receiving the second modulated signal set, the coding-control indicator sequence of acquisition it is current Indicated value is the first value, then carries out deformation space-time block code to the second modulated signal set.

Fig. 4 is the schematic flow chart of the coding/decoding method provided according to embodiments of the present invention.Method shown in Fig. 4 is by how defeated The receiving device entered in multi output (Multiple Input Multiple Output, MIMO) system executes.

401, it obtains first and receives signal set.

402, which is decoded, determines the first estimation signal set, wherein first estimation It include P first estimation signal in signal set.

403, restoring operation is carried out to K first estimation signal in the P first estimation signal, obtains K reduction letter Number, the restoring operation is different to take to each bit in each first estimation signal, and K is the positive integer less than or equal to P.

404, determine the corresponding first object estimation signal set of the first estimation signal set, first object estimation letter Number set include the K recovering signal with do not carry out the restoring operation (P-K) it is a first estimate signal.

Method according to Fig.4, receiving device can be to the variants sent after deforming space-time block code Matrix is accurately decoded, and the signal sent to sending ending equipment is accurately estimated.But illegal receiving device And it is unaware of how the first variant matrix obtains, therefore illegal receiving device can not be to the first variant matrix It is accurately decoded, so that the first variant matrix can not be reduced to the first modulated signal set before coding.Therefore, scheme Method shown in 4 can be effectively protected the Content of Communication of legal communicating pair.

Fig. 5 is the schematic flow chart of another coding/decoding method provided according to embodiments of the present invention.Equipment shown in fig. 5 by Receiving device in multiple-input and multiple-output (Multiple Input Multiple Output, MIMO) system executes.

501, it obtains first and receives signal set.

502, which is decoded, determines the first estimation signal set, wherein first estimation Signal set includes P first estimation signal.

Specifically, maximum-likelihood decoding algorithm can be used to decode the first reception signal set, obtain P the One decision statistic signal.Then, it is determined that the constellation point that each first decision statistic signal is nearest, which is that this first is sentenced The certainly corresponding first estimation signal of statistical signal.In this way, can complete to be decoded the first reception signal set, it is somebody's turn to do First estimation signal set.

503, the coding-control indicator sequence prestored is read, determines current indicated value.

504, in the case where determining the current indicated value is the first value, reduction behaviour is carried out to the P first estimation signal Make, obtain K recovering signal, the restoring operation be each bit in each first estimation signal is taken it is different, K to be less than or Positive integer equal to P.

505, determine the corresponding volume first object estimation signal set of the first estimation signal set, first object estimation Signal set includes the K recovering signal and (P-K) a first estimation signal to carry out the restoring operation.

Signal in first object estimation signal set is the estimation of the corresponding modulated signal of sending ending equipment Value.

506, it obtains second and receives signal set.

507, which is decoded, determines the second estimation signal set, wherein second estimation Signal set includes Q second estimation signal.

The process be decoded to the second reception signal set and the mistake that the first reception signal set is decoded Journey is similar, and difference is not needing the restoring operation of final step, the process pair being decoded to the second reception signal set In known in Communication Studies personnel, need not just repeat herein.

508, the coding-control indicator sequence prestored is read, determines current indicated value.

509, in the case where determining the current indicated value is second value, determine the second estimation signal set corresponding the Two target state estimator signal sets include the Q second estimation signal.

It is appreciated that in " current " in the current indicated value in step 503 and the current indicated value in step 508 " current " is not synchronization.For example, if the first reception signal set was obtained at the first moment, step 508 In current indicated value in " current " refer to " current " corresponding to the first moment.If this second reception signal set be What the second moment obtained, then " current " in the current indicated value in step 508 refers to " current " corresponding to the second moment.

Signal in the second target state estimator signal set is the estimation of the corresponding modulated signal of sending ending equipment Value.

For the convenience of description, will determine that target state estimator signal set coding/decoding method is referred to as by carrying out restoring operation below Packet decoding when deformation is empty.

It is understood that " first " and " second " in the first estimation signal set and the second estimation signal set is only In order to distinguish different estimation signal sets, not to the limitation of estimation signal set.Such as, if it is determined that the first estimation signal After set, the current indicated value of the coding-control indicator sequence of acquisition is second value, then carries out to the first estimation signal set The decoding of orthogonal space time group.If it is determined that after the second estimation signal set, the current instruction of the coding-control indicator sequence of acquisition Value is the first value, then packet decoding when carrying out deforming sky to the second modulated signal set.

Method according to figure 5, the different indicated values in the coding-control indicator sequence are stored in legal logical simultaneously Believe both sides (i.e. legal sending ending equipment and legal receiving device).Therefore, legal receiving device is known that conjunction The sending ending equipment of method is to be encoded using which kind of coding method to the signal in modulation signal set.But illegal reception End equipment, which is not aware that, sends the coding-control indicator sequence.Therefore, illegal receiving device does not know sending ending equipment institute The signal of transmission is using deformation space-time block code or Orthogonal Space-Time Block Code.Legal receiving device knows hair Sending end equipment is how to carry out deformation block encoding.Therefore, grouping solution when legal receiving device can use deformation sky The signal that code sends transmitting terminal is accurately decoded, and is obtained corresponding estimation signal, is then solved to the estimation signal It adjusts.But illegal receiving device and it is unaware of how the first variant matrix obtains, therefore illegal receiving end is set It is standby the signal received accurately to be decoded, so that accurately estimation signal can not be obtained.In conclusion legal Communicating pair uses two layers of mechanism (packet decoding when coding-control indicator sequence is empty with deformation) and protects to Content of Communication, So that the probability that illegal receiving device is correctly decoded substantially reduces, the safety of Content of Communication can effectively ensure that.

In the following, will the present invention is described further in conjunction with specific embodiments.It should be noted that the following examples The present invention is better understood only to assist in those skilled in the art, and is not limitation of the present invention.

Embodiment one

Communicating pair in embodiment one receives the mimo system of half code rate using four hairs one, i.e. transmitting terminal is set Standby to send signal using four antennas, receiving device receives signal using an antenna.

Sending ending equipment, which obtains, passes through the modulated first modulated signal set of M-QAM, the first modulated signal set packet Include four modulated signals, respectively x₁、x₂、x₃And x₄.It is appreciated that in order to guarantee that receiving device receives the performance of signal most Excellent, four modulated signals in the first modulated signal set meet Gray and modulate mapping ruler, i.e., in four modulated signals The Hamming distance of each modulated signal and adjacent modulated signal is 1.

Sending ending equipment read the coding-control indicator sequence prestored be the first value in the case where, need to this first Modulated signal set carries out deformation space-time block code.

In the present embodiment, deformation space-time block code is carried out to the first modulated signal set and specifically includes following step Suddenly.

Determine the M signal of each modulated signal in four modulated signals, modulated signal x₁、x₂、x₃And x₄In Between signal be respectivelyWith

WithIn each M signal bit and the complete phase of the bit of corresponding modulated signal It is different.Each M signal is maximum under identical circumstances with the Hamming distance of corresponding modulated signal.When the M-QAM is modulated Mode is 2ⁿIn the case where the QAM modulation of system, the Hamming distance between each M signal and corresponding modulated signal is n. For example, each modulated signal is 4 with the Hamming distance of corresponding M signal in the case where the M-QAM is 16QAM.

Specifically, modulated signal x₁、x₂、x₃And x₄With corresponding M signalWithCorresponding relationship As shown in formula 1.1.

... ... ... ... ... ... ... ... ... formula 1.1

Wherein,It indicatesWith x₁Between Hamming distance, S be M-QAM modulation constellation point set.

Four deformation signals are determined by decision statistic formula according to four M signals and channel matrix.Channel matrix H=[h₁ h₂ h₃ h₄]。

Specifically, four deformation signals can be determined by statistical decision formula below：

... formula 1.2

Wherein, r₁、r₂、r₃、r₄、r₅、r₆、r₇、r₈As shown by the following formula：

... ... ... ... ... ... ... ... formula 1.3

Wherein,For corresponding to signal x₁Deformation signal s₁Conjugation, it is similar,For corresponding to signal x₂Deformation letter Number s₂Conjugation,For corresponding to signal x₃Deformation signal s₃Conjugation,For corresponding to signal x₄Deformation signal s₄Be total to Yoke.

As can be seen that in formula 1.1 and formula 1.2, formula 1.3, x₁、x₂、x₃And x₄, WithAnd h₁、 h₂、h₃And h₄It is all known.Therefore, it can use formula 1.1 and formula 1.2,1.3 calculated corresponding to four modulated signals Four deformation signals conjugation, and four deformation signal s are calculated according to the conjugation of four deformation signals₁、s₂、s₃And s₄。

Determine the first variant matrix for corresponding to the first modulated signal set, wherein the first variant matrix includes Four deformation signals.First variant matrix X'₄It can be matrix as follows：

Further, if carrying out Orthogonal Space-Time Block Code, X' to the first modulated signal set₄With to this first adjust Signal set processed carries out the X that orthogonal space-time block codes obtain₄It is similar.X₄As follows：

It can be seen that X'₄With X₄Difference be X₄Middle x₁、x₂、x₃And x₄Conjugation be replaced by s₁、s₂、s₃And s₄Be total to Yoke.

It can also obtain in sending ending equipment by the modulated second modulated signal set of M-QAM, and transmitting terminal is set The standby coding-control indicator sequence prestored read is second value, needs to carry out the second modulated signal set in the case Orthogonal Space-Time Block Code.

Receiving device received first receives signal set and the signal set received to first is decoded, and determines First estimation signal set.Detailed process is as follows, receives signal as shown in formula 1.4：

R=HX+n=[r₁ r₂ r₃ r₄ r₅ r₆ r₇ r₈] ... ... ... ... ... .. formula 1.4

Wherein, H indicate channel matrix, X indicate sending ending equipment send matrix, n indicate channel white complex gaussian noise to Amount.Channel matrix H=[h₁ h₂ h₃ h₄]。

Maximum-likelihood decoding algorithm is used to signal R is received, decision statistic result is as shown in formula 1.5：

... ... ... ... .. formula 1.5

Wherein,WithRespectively indicate four decision statistic signals.Four decision statistic signals are being determined Afterwards, the constellation point nearest apart from each decision statistic signal is found, which is to correspond to decision statistic letter Number first estimation signal.Specifically as shown in formula 1.6.

... ... ... .. formula 1.6

WithTo correspond respectively toWithFour first estimation signals.

After receiving device completes the decoding for receiving signal set to first by formula 1.5 and formula 1.6, receiving end Equipment reads the current indicated value of the coding-control indicator sequence prestored.When indicated value is the first value in this prior, receiving end is set It is standby to need to estimate that signal carries out restoring operation to each of this four first estimation signals first, four recovering signals are obtained, The restoring operation be by it is each first estimation signal each bit take it is different.Four recovering signals are respectively WithFour recovering signals are to correspond to first first object for receiving signal set to estimate signal.The first object Estimation signal is exactly the first modulated signal set x to sending ending equipment₁、x₂、x₃And x₄Estimated value.

As can be seen that being equivalent to from the process of the first estimation signal to recovering signal inverse from modulated signal to M signal Process.

Receiving device can also receive the second reception signal set, and be decoded to the second reception signal set. Specific decoding process is similar to the first reception decoding process of signal set, need not just repeat herein.Receiving device is read The current indicated value of the coding-control indicator sequence prestored.When indicated value is second value in this prior, to the second reception signal Gathering the second estimation signal set being decoded is the second target state estimator signal collection for corresponding to the second reception signal It closes.The second target state estimator signal set is exactly the estimated value to the modulated signal set of sending ending equipment.

It is understood that X'₄It is only an example of the first variant matrix.The first variant matrix can be with It is using any one or more replacements X in four deformation signals₄In corresponding signal.It is, for example, possible to use s₁And s₂Replacement X₄In x₁And x₂, s₃And s₄Conjugation replace x₃And x₄Conjugation.For another example, s can be used₁And s₂Replace X₄In x₁And x₂.It needs It is noted that " replacement " mentioned here simply means to use deformation signal to replace corresponding modulated signal in form, it is not Refer to that first carrying out orthogonal space-time block codes obtains such as X₄Shown in matrix, reuse deformation signal and replace corresponding modulated signal.In reality Now, the first variant matrix directly can be obtained by deformation signal.

It is understood that X'₄And X₄It is only the signal of one group of regular code matrix and variant matrix.In regular code matrix Any two column signal can be interchanged, and in regular code matrix in the case where the exchange of any two column signal, corresponding variant The position of the respective column of matrix is also required to carry out identical adjustment.

Embodiment two

Communicating pair in embodiment two is using four hair n_RThe mimo system of half code rate is received, i.e. transmitting terminal is set Standby to send signal using four antennas, receiving device uses n_RRoot antenna receives signal.

Determine the M signal of each modulated signal in four modulated signals, modulated signal x₁、x₂, in x3 and x4 Between signal be respectivelyWith

Modulated signal x₁、x₂、x₃And x₄With corresponding M signalWithRelationship and embodiment one in M signal it is identical as the relationship of modulated signal, that is, meet formula 1.1.

Four deformation signals are determined by decision statistic formula according to four M signals and channel matrix.In n_RPiece-root grafting In the case where receiving antenna, channel matrix H is as follows：

In formula, h_i,j(i=1 ..., n_RJ=1 ..., 3) indicate letter between i-th receiving antenna and jth root transmitting antenna Road fading coefficients.

In the present embodiment, four deformation signals can be determined by following decision statistic formula：

... ... ... ... ... ... formula 1.7

Wherein, in signal x_iBelong to X₄T column when,Value be r_j,t,Value beIn signalBelong to X₄T column when,Value be (r_j,t)^*,Value be∈_tIt indicates from encoder matrix first Arrange the symbol arrangement arranged to t, x in t column_iLine position set by ∈_t(i) it indicates, x in t column_iSymbol sgn_t(i) table Show.

It is understood that the decision statistic formula is determined according to the decision statistic formula of orthogonal space time packet. Therefore, the matrix that identical modulated signal obtain after Orthogonal Space-Time Block Code is known for sending ending equipment.Therefore, Signal x_iBelong to X₄T column be also equivalent to signal x_iBelong to X'₄T column, wherein X'₄For the change of the first modulated signal set Shape code matrix, X₄For the matrix for obtain after Orthogonal Space-Time Block Code to the first modulated signal set.

r_j,tIt is according to channel matrix H and modulated signal x₁、x₂、x₃And x₄And deformation deformation signal s₁、s₂、s₃And s₄It determines Matrix R' in jth row t column signal.Matrix R' is as follows：

Each signal in matrix R' is one about x_iIt, can be by the x in wherein four signals with the equation of h_iReplacement For corresponding deformation signal.Specifically, the signal in replaced matrix R' is as shown by the following formula：

... ... ... ... ... ... formula 1.8

In this way, utilizing formula 1.7 and 1.8 available four deformation signal s of formula₁、s₂、s₃And s₄.It determines to correspond to and be somebody's turn to do The variant matrix X' of first modulated signal set₄.Equally, if carrying out orthogonal space time group to the first modulated signal set It encodes, then X'₄The X that orthogonal space-time block codes obtain is carried out with to the first modulated signal set₄It is similar, X₄Matrix form with X in embodiment one₄It is identical.

Receiving device is decoded to reception signal and the process of restoring operation is similar in embodiment one, herein It need not just repeat.

It is similar with embodiment one, X'₄It is only a schematic diagram of the first variant matrix.The first variant matrix is also It can be using any one or more replacements X in four deformation signals₄In corresponding signal.It is, for example, possible to use s₁And s₂ Replace X₄In x₁And x₂, s₃And s₄Conjugation replace x₃And x₄Conjugation.For another example, s can be used₁And s₂Replace X₄In x₁With x₂.It should be noted that " replacement " mentioned here simply means to use deformation signal to replace corresponding modulated signal in form, and It is non-to refer to that first carrying out orthogonal space-time block codes obtains such as X₄Shown in matrix, reuse deformation signal and replace corresponding modulated signal. When realizing, the first variant matrix directly can be obtained by deformation signal.Also, it is understood that X'₄And X₄It is only The signal of one group of regular code matrix and variant matrix.Any two column signal can be interchanged in regular code matrix, and in routine In the case that any two column signal exchanges in code matrix, the position of the respective column of corresponding variant matrix is also required to carry out identical Adjustment.

Embodiment three

Communicating pair in embodiment three receives code rate mimo system using four hairs one, i.e. sending ending equipment uses four Root antenna sends signal, and receiving device receives signal using an antenna.

The process of deformation space-time block code is carried out in embodiment three to the first modulated signal set by M-QAM modulation It is the same as example 1, need not just repeat herein.

The first variant matrix X' that embodiment three obtains₄As follows：

Further, if carrying out Orthogonal Space-Time Block Code, the first variant matrix to the first modulated signal set X'₄With the matrix X obtained using Orthogonal Space-Time Block Code₄It is similar.X₄As follows：

It is similar with embodiment one, X'₄It is only a schematic diagram of the first variant matrix.The first variant matrix is also It can be using any one or more replacements X in four deformation signals₄In corresponding signal.It is, for example, possible to use s₁And s₂ Replace X₄In x₁And x₂.It should be noted that " replacement " mentioned here simply means to that deformation signal replacement is used to correspond in form Modulated signal, do not mean that first carry out orthogonal space-time block codes obtain such as X₄Shown in matrix, reuse deformation signal replacement pair The modulated signal answered.When realizing, the first variant matrix directly can be obtained by deformation signal.Also, it is understood that It is X'₄And X₄It is only the signal of one group of regular code matrix and variant matrix.Any two column signal can be mutual in regular code matrix It changes, and in regular code matrix in the case where the exchange of any two column signal, the position of the respective column of corresponding variant matrix It is also required to carry out identical adjustment.

Example IV

Communicating pair in example IV is using four hair n_RThe mimo system of code rate is received, i.e. sending ending equipment uses Four antennas send signal, and receiving device uses n_RRoot antenna receives signal.

The process of deformation space-time block code is carried out in example IV to the first modulated signal set by M-QAM modulation It is identical as embodiment two, it need not just repeat herein.

The first variant matrix X' that example IV obtains₄Matrix form can be with embodiment third is that identical, herein It need not just repeat.Equally, if carrying out Orthogonal Space-Time Block Code, the first variant matrix to the first modulated signal set X'₄With the matrix X obtained using Orthogonal Space-Time Block Code₄It is similar, X₄With the X in embodiment three₄Matrix form is identical.

Embodiment five

Communicating pair in embodiment one receives the mimo system of code rate using three hairs one, i.e. sending ending equipment uses Three antennas send signal, and receiving device receives signal using an antenna.

Three modulated signals in first modulated signal set are transformed to M signal.It, can be with for example, in the present embodiment By x₁、x₂And x₃Being transformed to corresponding M signal is

WithIn each M signal bit and the bit of corresponding modulated signal it is completely different.Respectively A M signal is maximum under identical circumstances with the Hamming distance of corresponding modulated signal.When the M-QAM modulation system It is 2ⁿIn the case where the QAM modulation of system, the Hamming distance between each M signal and corresponding modulated signal is n.For example, In the case where the M-QAM is 16QAM, each modulated signal is 4 with the Hamming distance of corresponding M signal.

Specifically, modulated signal x₁、x₂And x₃With corresponding M signalWithCorresponding relationship such as formula 1.9 shown.

... ... ... ... ... ... ... ... .. formula 1.9

Three deformation signals are determined by decision statistic formula according to three M signals and channel matrix.Channel matrix H=[h₁ h₂ h₃]。

Specifically, three deformation signals can be determined by statistical decision formula below：

... ... formula 1.10

Wherein, r₁、r₂、r₃、r₄As shown by the following formula：

... ... ... ... ... ... ... ... ... formula 1.11

Wherein, s₁For corresponding to modulated signal x₁Deformation signal, similar, s₂For corresponding to modulated signal x₂Deformation Signal, s₃For corresponding to modulated signal x₃Deformation signal.

As can be seen that in formula 1.9, formula 1.10 and formula 1.11, x₁、x₂、x₃And x₄,WithAnd h₁、 h₂And h₃It is all known.Therefore, formula 1.9, formula 1.10 and formula 1.11 be can use and calculated and believed corresponding to three modulation Number three deformation signals conjugation, and three deformation signal s are calculated according to the conjugation of three deformation signals₁、s₂And s₃。

Determine the first variant matrix for corresponding to the first modulated signal set, wherein the first variant matrix includes Three deformation signals.First variant matrix X'₃It can be matrix as follows：

Further, if carrying out Orthogonal Space-Time Block Code, X' to the first modulated signal set₃With to this first adjust Signal set processed carries out the X that orthogonal space-time block codes obtain₃It is similar.X₃As follows：

It is similar with embodiment one, X'₃It is only a schematic diagram of the first variant matrix.The first variant matrix is also It can be using any one or more replacements X in three deformation signals₃In corresponding signal.It is, for example, possible to use s₁And s₂ Replace X₃In x₁And x₂.It should be noted that " replacement " mentioned here simply means to that deformation signal replacement is used to correspond in form Modulated signal, do not mean that first carry out orthogonal space-time block codes obtain such as X₃Shown in matrix, reuse deformation signal replacement pair The modulated signal answered.When realizing, the first variant matrix directly can be obtained by deformation signal.Also, it is understood that It is X'₃And X₃It is only the signal of one group of regular code matrix and variant matrix.Any two column signal can be mutual in regular code matrix It changes, and in regular code matrix in the case where the exchange of any two column signal, the position of the respective column of corresponding variant matrix It is also required to carry out identical adjustment.

Embodiment six

The mimo system for the all-key rate that communicating pair in embodiment six is received using five hairs one.I.e. sending ending equipment is adopted Signal is sent with five antennas, receiving device receives signal using an antenna.

Six sending ending equipment of embodiment is to the side for carrying out deformation space-time block code by the modulated modulated signal of M-QAM Method is similar with embodiment five.As a specific embodiment, can be selected from 8 modulated signals in the first modulated signal set It selects 5 modulated signals to be deformed, obtains 5 deformation signals.The first obtained variant matrix is by 5 deformation signals and not The 3 modulated signals composition deformed.Specifically, the first variant matrix X'₅As follows：

Further, if carrying out Orthogonal Space-Time Block Code, X' to the first modulated signal set₅With to this first adjust Signal set processed carries out the X that orthogonal space-time block codes obtain₅It is similar.X₅As follows：

Embodiment one is similar, X'₅It is only a schematic diagram of the first variant matrix.The first variant matrix may be used also To be using any one or more replacements X in 5 deformation signals₅In corresponding signal.It is, for example, possible to use s₁And s₂It replaces Change X₅In x₁And x₂.It should be noted that " replacement " mentioned here simply mean to use deformation signal to replace in form it is corresponding Modulated signal does not mean that first carrying out orthogonal space-time block codes obtains such as X₅Shown in matrix, reuse deformation signal replacement correspond to Modulated signal.When realizing, the first variant matrix directly can be obtained by deformation signal.Also, it is understood that X'₅And X₅It is only the signal of one group of regular code matrix and variant matrix.Any two column signal can be interchanged in regular code matrix, And in the case that any two column signal exchanges in regular code matrix, the position of the respective column of corresponding variant matrix is also needed Carry out identical adjustment.

Embodiment seven

The mimo system for the all-key rate that communicating pair in embodiment seven is received using six hairs one.I.e. sending ending equipment is adopted Signal is sent with six roots of sensation antenna, receiving device receives signal using an antenna.

Seven sending ending equipment of embodiment carries out deformation space-time block code to by modulated first modulated signal of M-QAM Method it is similar with embodiment five.It, can be from 8 modulated signals in the first modulated signal set as a specific embodiment 6 modulated signals of middle selection are deformed, and 6 deformation signals are obtained.The first obtained variant matrix is by 6 deformation signals It is formed with 2 modulated signals not deformed.Specifically, the first variant matrix X'₆As follows：

Further, if carrying out Orthogonal Space-Time Block Code, X' to the first modulated signal set₆With to this first adjust Signal set processed carries out the X that orthogonal space-time block codes obtain₆It is similar.X₆As follows：

Embodiment one is similar, X'₆It is only a schematic diagram of the first variant matrix.The first variant matrix may be used also To be using any one or more replacements X in 6 deformation signals₆In corresponding signal.It is, for example, possible to use s₁And s₂It replaces Change X₆In x₁And x₂.It should be noted that " replacement " mentioned here simply mean to use deformation signal to replace in form it is corresponding Modulated signal does not mean that first carrying out orthogonal space-time block codes obtains such as X₆Shown in matrix, reuse deformation signal replacement correspond to Modulated signal.When realizing, the first variant matrix directly can be obtained by deformation signal.Also, it is understood that X'₆And X₆It is only the signal of one group of regular code matrix and variant matrix.Any two column signal can be interchanged in regular code matrix, And in the case that any two column signal exchanges in regular code matrix, the position of the respective column of corresponding variant matrix is also needed Carry out identical adjustment.

Embodiment eight

The mimo system for the all-key rate that communicating pair in embodiment eight is received using seven hairs one.I.e. sending ending equipment is adopted Signal is sent with seven antennas, receiving device receives signal using an antenna.

Eight sending ending equipment of embodiment carries out deformation space-time block code to by modulated first modulated signal of M-QAM Method it is similar with embodiment five.It, can be from 8 modulated signals in the first modulated signal set as a specific embodiment 7 modulated signals of middle selection are deformed, and 7 deformation signals are obtained.The first obtained variant matrix is by 7 deformation signals It is formed with 1 modulated signal not deformed.Specifically, the first variant matrix X'₇As follows：

Further, if carrying out Orthogonal Space-Time Block Code, X' to the first modulated signal set₇With to this first adjust Signal set processed carries out the X that orthogonal space-time block codes obtain₇It is similar.X₇As follows：

Embodiment one is similar, X'₇It is only a schematic diagram of the first variant matrix.The first variant matrix may be used also To be using any one or more replacements X in 7 deformation signals₇In corresponding signal.It is, for example, possible to use s₁And s₂It replaces Change X₇In x₁And x₂.It should be noted that " replacement " mentioned here simply mean to use deformation signal to replace in form it is corresponding Modulated signal does not mean that first carrying out orthogonal space-time block codes obtains such as X₇Shown in matrix, reuse deformation signal replacement correspond to Modulated signal.When realizing, the first variant matrix directly can be obtained by deformation signal.Also, it is understood that X'₇And X₇It is only the signal of one group of regular code matrix and variant matrix.Any two column signal can be interchanged in regular code matrix, And in the case that any two column signal exchanges in regular code matrix, the position of the respective column of corresponding variant matrix is also needed Carry out identical adjustment.

Embodiment nine

Communicating pair in embodiment nine is using three hair n_RThe mimo system of code rate is received, i.e. sending ending equipment uses Three antennas send signal, and receiving device uses n_RRoot antenna receives signal.

In embodiment nine by by the modulated modulated signal set of M-QAM carry out deformation space-time block code process with Process in embodiment five is similar.The difference is that n_RThe channel matrix H and decision statistic formula of root antenna change.

For n_RThe situation of root receiving antenna, channel matrix H are：

Three deformation signals are determined using following decision statistic formula.

... ... formula 1.12

r_j,tIt is according to channel matrix H and modulated signal and deformation signal s₁、s₂And s₃Jth row in determining matrix R' T column signal.Matrix R' is as follows：

Each signal in matrix R' is one about x_iIt, can be by the x in wherein three signals with the equation of h_iReplacement For corresponding deformation signal.In this way, utilizing formula 1.12 available three deformation signals s1, s2 and s3.It determines to correspond to and be somebody's turn to do The variant matrix of first modulated signal set.

The first variant in variant matrix and embodiment five after carrying out deformation space-time block code in embodiment nine Matrix X'₃Matrix form is identical, further, if carrying out Orthogonal Space-Time Block Code, X' to the first modulated signal set₃ The X that orthogonal space-time block codes obtain is carried out with to the first modulated signal set₃It is similar, X₃Matrix form is also and in embodiment five X₃It is identical.

Further, the method in embodiment nine can also be generalized to five hair n_RReceive mimo system, the six hair n of code rate_RIt receives The mimo system of code rate, seven hair n_RReceive the mimo system of code rate, method and three hair n_RThe method for receiving the mimo system of code rate It is similar, it need not just repeat herein.

Embodiment 11

Communicating pair in embodiment 11 receives the mimo system of code rate using eight hairs one, i.e. sending ending equipment is adopted Signal is sent with four antennas, receiving device receives signal using an antenna.

Sending ending equipment, which obtains, passes through the modulated first modulated signal set of M-QAM, the first modulated signal set packet Include eight modulated signals, respectively x₁、x₂、x₃、x₄、x₅、x₆、x₇And x₈.It is appreciated that in order to guarantee that receiving device receives letter Number best performance, eight modulated signals in the first modulated signal set meet gray mappings rule, i.e., this eight modulation The Hamming distance of each modulated signal and adjacent modulated signal is 1 in signal.

The case where the current indicated value for the coding-control indicator sequence prestored that sending ending equipment is read is the first value, hair Sending end equipment needs carry out deformation space-time block code to the first modulated signal set.

Determine the M signal of each modulated signal in eight modulated signals, modulated signal x₁、x₂、x₃、x₄、x₅、x₆、x₇ And x₈Corresponding M signal is respectivelyWith

WithIn each M signal bit and corresponding tune The bit of signal processed is completely different.The Hamming distance of the corresponding modulated signal of each M signal is under identical circumstances most Big.When the M-QAM modulation system is 2ⁿIn the case where the QAM modulation of system, each M signal and corresponding modulated signal Between Hamming distance be n.For example, in the case where the M-QAM is 16QAM, each modulated signal and corresponding M signal Hamming distance be 4.

Specifically, modulated signal x₁、x₂、x₃、x₄、x₅、x₆、x₇And x₈Corresponding M signal WithCorresponding relationship as shown in formula 1.13：

... ... ... ... ... ... ... ... ... formula 1.13

Eight deformation signals are determined by decision statistic formula according to eight M signals and channel matrix.Channel matrix H=[h₁ h₂ h₃ h₄ h₅ h₆ h₇ h₈]。

Specifically, eight deformation signals can be determined by statistical decision formula below：

... ... formula 1.14

... ... ... ... formula 1.15

As can be seen that in formula 1.13 and formula 1.14, formula 1.15, x₁、x₂、x₃、x₄、x₅、x₆、x₇WithWithAnd h₁、h₂、h₃、h₄、h₅、h₆、h₇And h₈It is all known.Therefore, It can use formula 1.13 and formula 1.14, formula 1.15 calculate eight deformation signal s corresponding to eight modulated signals₁、 s₂、s₃、s₄、s₅、s₆、s₇And s₈。

Determine the first variant matrix for corresponding to the first modulated signal set, wherein the first variant matrix includes Eight deformation signals.First variant matrix X'₈It can be matrix as follows：

Further, further, if carrying out Orthogonal Space-Time Block Code, X' to the first modulated signal set₈With it is right The first modulated signal set carries out the X that orthogonal space-time block codes obtain₈It is similar.X₈As follows：

Embodiment one is similar, X'₈It is only a schematic diagram of the first variant matrix.The first variant matrix may be used also To be using any one or more replacements X in eight deformation signals₈In corresponding signal.It is, for example, possible to use s₁And s₂It replaces Change X₈In x₁And x₂.It should be noted that " replacement " mentioned here simply mean to use deformation signal to replace in form it is corresponding Modulated signal does not mean that first carrying out orthogonal space-time block codes obtains such as X₈Shown in matrix, reuse deformation signal replacement correspond to Modulated signal.When realizing, the first variant matrix directly can be obtained by deformation signal.Also, it is understood that X'₈And X₈It is only the signal of one group of regular code matrix and variant matrix.Any two column signal can be interchanged in regular code matrix, And in the case that any two column signal exchanges in regular code matrix, the position of the respective column of corresponding variant matrix is also needed Carry out identical adjustment.

Embodiment 12

Communicating pair in embodiment 12 is using eight hair n_RThe mimo system of code rate is received, i.e. sending ending equipment is adopted Signal is sent with four antennas, receiving device uses n_RRoot antenna receives signal.

Specifically, modulated signal x₁、x₂、x₃、x₄、x₅、x₆、x₇And x₈Corresponding M signal WithCorresponding relationship it is identical as embodiment 12, that is, meet shown in formula 1.13.

Eight deformation signals are determined by decision statistic formula according to eight M signals and channel matrix.Channel matrix As follows：

In formula, h_i,j(i=1 ..., n_RJ=1 ..., 8) indicate letter between i-th receiving antenna and jth root transmitting antenna Road fading coefficients.

... ... ... ... ... formula 1.16

Wherein, in signal x_iBelong to X₈T column when,Value be r_j,t,Value beBelieving NumberBelong to X₄T column when,Value be (r_j,t)^*,Value be∈_tIt indicates from encoder matrix the One arranges the symbol arrangement arranged to t, x in t column_iLine position set by ∈_t(i) it indicates, x in t column_iSymbol sgn_t(i) table Show.

It is understood that the decision statistic formula is determined according to the decision statistic formula of orthogonal space time packet. Therefore, the matrix that identical modulated signal obtain after Orthogonal Space-Time Block Code is known for sending ending equipment.Therefore, Signal x_iBelong to X₈T column be also equivalent to signal x_iBelong to X'₈T column, wherein X'₈For the change of the first modulated signal set Shape code matrix, X₈For the matrix for obtain after Orthogonal Space-Time Block Code to the first modulated signal set.

r_j,tIt is according to channel matrix H and modulated signal x₁、x₂、x₃、x₄、x₅、x₆、x₇And x₈And deformation deformation signal s₁、 s₂、s₃、s₄、s₅、s₆、s₇And s₈Jth row t column signal in determining matrix R'.Matrix R' is as follows：

Each signal in matrix R' is one about x_iIt, can be by the x in wherein eight signals with the equation of h_iReplacement For corresponding deformation signal.Specifically, the signal in replaced matrix R' is as shown by the following formula：

Formula 1.17

Eight deformation signal s corresponding to eight modulated signals can be calculated according to formula 1.16 and formula 1.17₁、s₂、 s₃、s₄、s₅、s₆、s₇And s₈.Determine the variant matrix for corresponding to the first modulated signal set.The variant matrix form can To be and the X' in embodiment 11₈Identical matrix.Equally, if carrying out orthogonal space time to the first modulated signal set Group encodes, then X'₈The X that orthogonal space-time block codes obtain is carried out with to the first modulated signal set₈It is similar, X₈With embodiment X in 11₈Matrix form is identical.

It should be noted that, according to M signal and channel matrix, passing through decision statistic formula in the embodiment of the present invention When determining K deformation signal, influence of noise is had ignored.

Fig. 6 is the structural block diagram of the equipment provided according to embodiments of the present invention.As shown in fig. 6, equipment 600 includes obtaining list Member 601 and determination unit 602.

Acquiring unit 601, for obtaining the first modulated signal set Jing Guo M-ary orthogonal amplitude modulation, wherein this One modulated signal set includes P modulated signal, which meets Gray and modulate mapping ruler.

Determination unit 602, for determining K modulated signal from the P modulated signal, wherein K is less than or equal to P's Positive integer.

Determination unit 602 is also used to determine that K M signal for corresponding to the K modulated signal, each M signal exist The bit mapped on planisphere and the corresponding modulated signal bit mapped on the planisphere are completely different.

Determination unit 602 is also used to determine K by decision statistic formula according to the K M signal and channel matrix A deformation signal.

Determination unit 602 is also used to determine the first variant matrix for corresponding to the first modulated signal set, wherein should First variant matrix includes L deformation signal in the K deformation signal, and wherein L is the positive integer less than or equal to K.

Equipment 600 shown in fig. 6 can send the first variant matrix by more antennas.By first modulated signal It is well known for communicating pair that set, which is encoded to obtain the strategy of the first variant matrix,.In this way, legal reception End equipment can accurately decode the first variant matrix, and the modulation letter in the first modulated signal set is obtained Number, and the modulated signal got is demodulated.But it illegal receiving device and is unaware of the first variant matrix and is How to obtain, therefore illegal receiving device can not accurately decode the first variant matrix, thus can not The first modulated signal set before first variant matrix to be reduced to coding.Therefore, equipment 600 shown in fig. 6 can be effective Protect the Content of Communication of legal communicating pair in ground.

Further, acquiring unit 601 are also used to read the coding-control indicator sequence prestored, determine current indicated value.? In this case, determination unit 602, is specifically used in the case where acquiring unit 601 determines that the current indicated value is the first value, from The K modulated signal is determined in the P modulated signal.

Further, acquiring unit 601 are also used to obtain the second modulated signal collection by the M-ary orthogonal amplitude modulation It closes, which includes Q modulated signal.Acquiring unit 601 is also used to read the coding-control prestored and refers to Show sequence, determines current indicated value.Determination unit 602 is also used to determine that the current indicated value is second value in acquiring unit 601 In the case where, Orthogonal Space-Time Block Code is carried out to the second modulated signal set, determines and corresponds to the second signal set Second regular code matrix.

Equipment 600 can select different coding methods to acquisition by the different indicated values of coding-control indicator sequence To modulated signal set encoded.Different indicated values in the coding-control indicator sequence are stored in legal communication simultaneously Both sides' (i.e. legal sending ending equipment and legal receiving device).Therefore, legal receiving device is known that legal Sending ending equipment be using which kind of coding method to modulation signal set in signal encode.But illegal receiving end Equipment, which is not aware that, sends the coding-control indicator sequence.Therefore, illegal receiving device does not know that sending ending equipment is sent out The signal sent is using deformation space-time block code or Orthogonal Space-Time Block Code.In this way, legal communicating pair uses Two layers of mechanism (coding-control indicator sequence and deformation space-time block code) protects Content of Communication, so that illegal connects The probability that receiving end equipment is correctly decoded substantially reduces, and can effectively ensure that the safety of Content of Communication.

Equipment 600 shown in fig. 6 can execute each step of method shown in fig. 1 or fig. 2.Also, it is understood that Fig. 6 Shown in equipment be support mimo system equipment.

Fig. 7 is the structural block diagram of another equipment provided according to embodiments of the present invention.As shown in fig. 7, equipment 700 includes： Acquiring unit 701, decoding unit 702 and determination unit 703.

Acquiring unit 701 receives signal set for obtaining first.

Decoding unit 702, for this first reception signal set be decoded, determine the first estimation signal set, In the first estimation signal set include P the first estimation signal.

Determination unit 703 is obtained for carrying out restoring operation to K first estimation signal in the P first estimation signal K recovering signal is taken, which is each bit to each first estimation signal in the K first estimation signal Position takes different, and K is positive integer less than or equal to P；

Determination unit 703 is also used to determine the corresponding first object estimation signal set of the first estimation signal, this first Target state estimator signal set includes the K recovering signal and (P-K) a first estimation signal to carry out the restoring operation.

Equipment 700 can carry out the variant matrix sent after deforming space-time block code quasi- according to Fig.7, True decoding, the signal sent to sending ending equipment are accurately estimated.But illegal receiving device and it is unaware of How one variant matrix obtains, therefore illegal receiving device can not carry out accurately the first variant matrix Decoding, so that the first variant matrix can not be reduced to the first modulated signal set before coding.Therefore, shown in Fig. 7 to set The standby Content of Communication that can be effectively protected legal communicating pair.

Further, acquiring unit 701 are also used to read the coding-control indicator sequence prestored, determine current indicated value.? In this case, determination unit 703, is specifically used in the case where the acquiring unit determines that dispatching current indicated value is the first value, The restoring operation is carried out to the K first estimation signal in the P first estimation signal.

Further, acquiring unit 701 are also used to obtain the second reception signal set.Decoding unit 702, is also used to this Second reception signal set is decoded, and determines the second estimation signal set, and wherein the second estimation signal set includes Q the Two estimation signals.Acquiring unit 701 is also used to read the coding-control indicator sequence prestored, determines current indicated value.It determines Unit 703 is also used in the case where the acquiring unit determines that the current indicated value is second value, determines the second estimation signal Gathering corresponding second target state estimator signal set includes the Q second estimation signal.

Different indicated values in the coding-control indicator sequence are stored in legal communicating pair, i.e., legal transmission simultaneously End equipment and legal receiving device (i.e. equipment 700).Therefore, legal receiving device (i.e. equipment 700) is known that Legal sending ending equipment is to be encoded using which kind of coding method to the signal in modulation signal set.But it illegal connects Receiving end equipment, which is not aware that, sends the coding-control indicator sequence.Therefore, illegal receiving device does not know sending ending equipment Transmitted signal is using deformation space-time block code or Orthogonal Space-Time Block Code.Therefore, legal communicating pair Content of Communication is protected using two layers of mechanism (packet decoding when coding-control indicator sequence is empty with deformation), so that illegally The probability that is correctly decoded of receiving device substantially reduce, can effectively ensure that the safety of Content of Communication.

Equipment 700 shown in Fig. 7 can execute each step of Fig. 3 or method shown in Fig. 4.Also, it is to be understood that figure Equipment shown in 7 is the equipment for supporting mimo system.

Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed The scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description, The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.

In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit It closes or communicates to connect, can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a People's computer, server or network equipment etc.) or processor (processor) execute side described in each embodiment of the present invention The all or part of the steps of method.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey The medium of sequence code.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers It is included within the scope of the present invention, therefore protection scope of the present invention should be subject to the protection scope in claims.

Claims

1. a kind of coding method, which is characterized in that the method includes：

The first modulated signal set Jing Guo M-ary orthogonal amplitude modulation is obtained, wherein the first modulated signal set includes P modulated signal, the P modulated signal meet Gray and modulate mapping ruler；

K modulated signal is determined from the P modulated signal, wherein K is the positive integer less than or equal to P；

Determine K M signal for corresponding to the K modulated signal, the bit that each M signal maps on planisphere It is completely different with the corresponding modulated signal bit mapped on the planisphere；

K deformation signal is determined by decision statistic formula according to the K M signal and channel matrix；

The the first variant matrix for corresponding to the first modulated signal set is determined, wherein the first variant matrix includes L deformation signal in the K deformation signal, wherein L is the positive integer less than or equal to K.

2. the method as described in claim 1, which is characterized in that determined from the P modulated signal K modulated signal it Before, the method also includes：

The coding-control indicator sequence prestored is read, determines current indicated value；

The K modulated signal determining from the P modulated signal, including：

In the case where determining the current indicated value is the first value, the K modulation letter is determined from the P modulated signal Number.

3. method according to claim 2, which is characterized in that the method also includes：

The second modulated signal set Jing Guo the M-ary orthogonal amplitude modulation is obtained, the second modulated signal set includes Q modulated signal, the Q modulated signal meet Gray and modulate mapping ruler；

The coding-control indicator sequence prestored described in reading, determines current indicated value；

When determining the current indicated value is second value, orthogonal space time group is carried out to the second modulated signal set Coding determines the second regular code matrix for corresponding to the second modulated signal set.

4. a kind of coding/decoding method, which is characterized in that the method includes：

It obtains first and receives signal set；

The first reception signal set is decoded, determines the first estimation signal set, wherein the first estimation signal Set includes P first estimation signal；

Restoring operation is carried out to K first estimation signal in the P first estimation signal, obtains K recovering signal, it is described Restoring operation be each bit of each of the K the first estimation signal the first estimation signal is taken it is different, K be less than or Positive integer equal to P；

Determine that the corresponding first object estimation signal set of the first estimation signal set, the first object estimate signal collection Close (P-K) a first estimation signal for including the K recovering signal and not carrying out the restoring operation.

5. method as claimed in claim 4, which is characterized in that the K change in the determination P second processing signal Before shape signal, the method also includes：

K deformation signal in the determination P second processing signal, including：

When determining the current indicated value is the first value, the K first in the P first estimation signal is estimated It counts signal and carries out the restoring operation.

6. method as claimed in claim 5, which is characterized in that the method also includes：

It obtains second and receives signal set；

The second reception signal set is decoded, determines the second estimation signal set, wherein the second estimation signal Set includes Q second estimation signal；

In the case where determining the current indicated value is second value, corresponding second mesh of the second estimation signal set is determined Mark estimation signal set includes the Q second estimation signal.

7. a kind of equipment, which is characterized in that the equipment includes：

Acquiring unit, for obtaining the first modulated signal set Jing Guo M-ary orthogonal amplitude modulation, wherein described first adjusts Signal set processed includes P modulated signal, and the P modulated signal meets Gray and modulate mapping ruler；

Determination unit, for determining K modulated signal from the P modulated signal, wherein K is just whole less than or equal to P Number；

The determination unit is also used to determine that K M signal for corresponding to the K modulated signal, each M signal exist The bit mapped on planisphere and the corresponding modulated signal bit mapped on the planisphere are completely different；

The determination unit is also used to, by decision statistic formula, determine K according to the K M signal and channel matrix Deformation signal；

The determination unit is also used to determine the first variant matrix for corresponding to the first modulated signal set, wherein institute Stating the first variant matrix includes L deformation signal in the K deformation signal, and wherein L is just whole less than or equal to K Number.

8. equipment as claimed in claim 7, which is characterized in that

The acquiring unit is also used to read the coding-control indicator sequence prestored, determines current indicated value；

The determination unit, specifically for the acquiring unit determine the current indicated value be the first value in the case where, from The K modulated signal is determined in the P modulated signal.

9. equipment as claimed in claim 8, which is characterized in that

The acquiring unit is also used to obtain the second modulated signal set by the M-ary orthogonal amplitude modulation, described Second modulated signal set includes Q modulated signal, and the Q modulated signal meets Gray and modulate mapping ruler；

The determination unit is also used in the case where the acquiring unit determines that the current indicated value is second value, to institute It states the second modulated signal set and carries out Orthogonal Space-Time Block Code, determine the second regular code square for corresponding to second signal set Battle array.

10. a kind of equipment, which is characterized in that the equipment includes：

Acquiring unit receives signal set for obtaining first；

Decoding unit determines the first estimation signal set, wherein described for being decoded to the first reception signal set First estimation signal set includes P first estimation signal；

Determination unit obtains K for carrying out restoring operation to K first estimation signal in the P first estimation signal Recovering signal, the restoring operation are each bit to each of the K first estimation signal the first estimation signal Take different, K is positive integer less than or equal to P；

The determination unit, is also used to determine the first estimation signal corresponding first object estimation signal set, described the One target state estimator signal set includes that the K recovering signal is believed with (P-K) a first estimation to carry out the restoring operation Number.

11. equipment as claimed in claim 10, which is characterized in that

The determination unit is specifically used in the case where the acquiring unit determines that dispatching current indicated value is the first value, right The K first estimation signal in the P first estimation signal carries out the restoring operation.

12. equipment as claimed in claim 11, which is characterized in that

The acquiring unit is also used to obtain the second reception signal set；

The decoding unit is also used to be decoded the second reception signal set, determines the second estimation signal set, Described in the second estimation signal set include Q the second estimation signal；

The determination unit is also used to determine in the case where the acquiring unit determines that the current indicated value is second value Described second estimates that the corresponding second target state estimator signal set of signal set includes the Q second estimation signal.