CN105515608A - Spread spectrum processing method and spread spectrum processing device - Google Patents
Spread spectrum processing method and spread spectrum processing device Download PDFInfo
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- CN105515608A CN105515608A CN201410505511.9A CN201410505511A CN105515608A CN 105515608 A CN105515608 A CN 105515608A CN 201410505511 A CN201410505511 A CN 201410505511A CN 105515608 A CN105515608 A CN 105515608A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
Abstract
The invention discloses a spread spectrum processing method and a spread spectrum processing device. The spread spectrum processing method is characterized in that a plurality of spread spectrum sequences can be generated according to two or more than two binary pseudorandom sequences; and spread spectrum processing of data symbols to be transmitted can be carried out by adopting the plurality of spread spectrum sequences. According to the spread spectrum processing method, the spread spectrum processing of the data symbols to be transmitted of various transmitting devices can be carried out by adopting the plurality of spread spectrum sequences generated according to two or more than two binary pseudorandom sequences, and then the low cross correlation between the plurality of different spread spectrum sequences adopted by different transmitting devices can be guaranteed, and the by combining with the interference eliminating signal detectors adopted by the receiving devices, the signals transmitted by various transmitting devices can be discriminated effectively, and therefore the interference eliminating effect of the receiving devices and the non-orthogonal access multi-user receiving detecting performance can be improved, the higher overload level of the system can be supported, and the user non-orthogonal overload access and communication experience can be improved.
Description
Technical field
The present invention relates to code division multiple access access (CDMA, CodeDivisionMultipleAccess) technology, espespecially a kind of spread processing method and device.
Background technology
Code division multiple access access (CDMA, CodeDivisionMultipleAccess) is one of major programme of multi-user's multiple access technique.Current CDMA access system, such as DS CDMA access (DS-CDMA, DirectSequence-CodeDivisionMultipleAccess), multi-carrier code division multiple access (MC-CDMA, Multi-CarrierCodeDivisionMultipleAccess) etc., in the uplink, different transmitters or terminal adopt different binary pseudorandom (PN, Pseudo-Noise) sequence of real numbers carries out spread processing as frequency expansion sequence to the data symbol sent separately, formed after again carrier modulation being carried out to the data symbol sequence after spread processing and transmit and send to receiver.The data symbol sent due to different transmitters is carried on different frequency expansion sequences, these transmitters can be modulated to the data symbol sequence after spread spectrum on identical running time-frequency resource and transmit, so, receiver or base station can receive the superposed signal transmitted coming from each transmitter, then the different frequency expansion sequence that receiver adopts according to different transmitters distinguishes transmitting of each transmitter, and the reception realized each transmitter transmits detects.
Binary pseudo random sequence also can be called binary pseudo-random sequence, and its element value is typically expressed as 0 or 1, also can be expressed as bipolar sequence further, namely 0 be expressed as+1,1 and be expressed as-1, or 0 is expressed as-1,1 is expressed as+1.
Due between the frequency expansion sequence that different transmitters adopts, there is non-fully orthogonality, therefore, can interference mutually between the transmitting of different transmitters, thus cause multi-access inference.For this multi-access inference, receiver effectively can suppress by adopting the multiuser signal detector with interference elimination function, such as serial interference elimination multi-user detector, parallel interference canceller multi-user detector etc., thus raising power system capacity, and realize the more terminal access of load under certain transmission rate condition quantity, realize system overload.
But, when the system is overloaded, low cross correlation between the binary pseudo random sequence that different transmitters adopts also is not easy to ensure, especially the binary pseudo random sequence that length is shorter, this can affect interference eradicating efficacy and the multi-user reception detection perform of the nonopiate access of code division multiple access, the terminal access quantity of influential system, thus have impact on the load capacity of system or the overload level of support, reduce the communication experiences of the nonopiate overload access of user.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of spread processing method and device, the reception detection perform of the nonopiate access of code division multiple access can be improved, ensure the effect that interference is eliminated, to support higher system overload level, thus promote the communication experiences of the nonopiate overload access of user.
In order to reach the object of the invention, the invention provides a kind of spread processing method, comprising: generating plural frequency expansion sequence according to two or more binary pseudo random sequence;
The plural frequency expansion sequence generated is utilized to carry out spread processing to sent data symbol.
Also comprise before the method: produce two or more binary pseudo random sequence described.
Two or more binary pseudo random sequence of described generation comprise: generated respectively by respective independently two or more binary pseudo random sequence makers.
Two or more binary pseudo random sequence of described generation comprise:
A binary pseudo random sequence is generated by a binary pseudo random sequence maker;
According to the fractionation strategy pre-set, the binary pseudo random sequence of this generation is split two or more binary pseudo random sequence of formation;
Wherein, the fractionation strategy pre-set comprises:
Serial to parallel conversion is carried out to form two or more binary pseudo random sequence to a binary pseudo random sequence of described generation;
Or, fragmented storage is carried out to form two or more binary pseudo random sequence to a binary pseudo random sequence of described generation;
Or, periodic sampling is carried out to form two or more binary pseudo random sequence to a binary pseudo random sequence of described generation.
Two or more binary pseudo random sequence of described generation comprise:
Generated by binary pseudo random sequence maker; Or, generated according to the pseudo random sequence mask of system configuration by binary pseudo random sequence maker; Or, by system configuration.
The length of described each binary pseudo random sequence is identical with the length of the plural frequency expansion sequence of described generation.
The plural frequency expansion sequence of described generation comprises:
According to the mapping relations between two or more binary pseudo random sequence and constellation of complex figure, two or more binary pseudo random sequence described are mapped to constellation of complex figure by turn jointly, the sequence of complex numbers obtained forms described plural frequency expansion sequence; Wherein,
Described mapping relations between two or more binary pseudo random sequence and constellation of complex figure are: the one-to-one relationship between the various value set of the component of two or more binary pseudo random sequence described and each constellation point of constellation of complex figure;
Described constellation of complex figure comprises the constellation point that two or more complex coordinates are formed.
Two or more binary pseudo random sequence described comprise the first binary pseudo random sequence and the second binary pseudo random sequence;
The plural frequency expansion sequence of described generation comprises:
Carry out phase deviation according to the phase pushing figure pre-set to the second binary pseudo random sequence, wherein, phase pushing figure is the real number between 0 to 2 π;
Sequence after carrying out phase deviation is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence.
Two or more binary pseudo random sequence described comprise the first binary pseudo random sequence and the second binary pseudo random sequence;
The plural frequency expansion sequence of described generation comprises:
According to the mapping relations between binary pseudo random sequence and phase sets, the second binary pseudo random sequence is mapped; Phase sequence after mapping is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence; Wherein,
Mapping relations between binary pseudo random sequence and phase sets are the one-to-one relationship between each phase place in the various value of the component of binary pseudo random sequence and phase sets; Wherein, phase sets comprises two or more phase values between 0 to 2 π.
The method also comprises: described in the plural frequency expansion sequence that obtains be multiplied by normalization coefficient and be normalized.
The plural frequency expansion sequence described different pieces of information symbol to be sent being carried out to spread processing employing is different.
Describedly also to comprise before data symbol carries out spread processing: after data bit carries out coded modulation, generate described data symbol to be sent.
Also comprise after the method: formed after carrier modulation is carried out to the data symbol sequence after described spread processing and transmit and send to receiver.
Present invention also offers a kind of spread processing device, at least comprise generation module, spread processing module, wherein,
Generation module, for generating plural frequency expansion sequence according to two or more binary pseudo random sequence;
Spread processing module, carries out spread processing for utilizing the plural frequency expansion sequence of generation to sent data symbol.
Also comprise generation module, for generating two or more binary pseudo random sequence described.
Described generation module comprises two or more binary pseudo random sequence makers; Specifically for:
Two or more binary pseudo random sequence described are generated respectively by respective independently binary pseudo random sequence maker.
Described generation module comprises a binary pseudo random sequence maker; Specifically for:
This binary pseudo random sequence maker generates a binary pseudo random sequence, according to the fractionation strategy pre-set, this binary pseudo random sequence is split formation two or more binary pseudo random sequence described; Wherein, the fractionation strategy pre-set comprises:
Serial to parallel conversion is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Fragmented storage is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Periodic sampling is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated.
Described generation module specifically for: according to the mapping relations between two or more binary pseudo random sequence and constellation of complex figure, two or more binary pseudo random sequence described are mapped to constellation of complex figure by turn jointly, and the sequence of complex numbers obtained forms described plural frequency expansion sequence; Wherein,
Mapping relations between two or more binary pseudo random sequence and constellation of complex figure are: the one-to-one relationship between the various value set of the component of two or more binary pseudo random sequence described and each constellation point of constellation of complex figure; Wherein, constellation of complex figure comprises the constellation point that two or more complex coordinates are formed.
Described binary pseudo random sequence comprises the first binary pseudo random sequence and the second binary pseudo random sequence;
Described generation module specifically for:
Carry out phase deviation according to the phase pushing figure pre-set to the second binary pseudo random sequence, wherein, phase pushing figure is the real number between 0 to 2 π; Sequence after carrying out phase deviation is added by turn with the first binary pseudo random sequence and obtains described plural frequency expansion sequence.
Described binary pseudo random sequence comprises the first binary pseudo random sequence and the second binary pseudo random sequence;
Described generation module specifically for:
According to the mapping relations between binary pseudo random sequence and phase sets, the second binary pseudo random sequence is mapped; Phase sequence after mapping is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence; Wherein,
Mapping relations between binary pseudo random sequence and phase sets are the one-to-one relationship between each phase place in the various value of the component of binary pseudo random sequence and phase sets; Wherein, phase sets comprises two or more phase values between 0 to 2 π.
Described generation module also for, normalization coefficient is multiplied by the described plural frequency expansion sequence obtained and is normalized.
The plural frequency expansion sequence that described generation module generates is different;
Described spread processing module specifically for: for utilize the difference of generation plural number frequency expansion sequence carry out spread processing to sent different pieces of information symbol.
Also comprise: pretreatment module, after carrying out coded modulation to sent data bit, generate described data symbol to be sent.
Also comprise transmitter module, transmit for being formed after carrying out carrier modulation to the data symbol sequence after described spread processing and send to receiver.
Compared with prior art, technical scheme comprises and generates plural frequency expansion sequence according to two or more binary pseudo random sequence; The plural frequency expansion sequence generated is utilized to carry out spread processing to sent data symbol.The inventive method adopts the plural frequency expansion sequence generated according to two or more binary pseudo random sequence to carry out spread processing to respective data symbol to be sent respectively by each transmitter, ensure that the low cross correlation between the difference plural number frequency expansion sequence that different transmitters adopts, again in conjunction with the interference cancellation signals detector that existing receiver adopts, effective signal distinguished each transmitter and launched, improve the effect of receiver interference elimination and the performance of nonopiate access multi-user reception detection, and then support higher system overload level, improve the nonopiate overload access of user and the experience communicated.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of spread processing method of the present invention;
Fig. 2 is the composition connection diagram of spread processing device of the present invention;
Fig. 3 is the schematic diagram that the present invention generates the first embodiment of plural frequency expansion sequence;
Fig. 4 is the schematic diagram that the present invention generates the second embodiment of plural frequency expansion sequence;
Fig. 5 is the schematic diagram of the composition embodiment of binary pseudo-random generator of the present invention;
Fig. 6 is the schematic diagram that the present invention generates the 3rd embodiment of plural frequency expansion sequence;
Fig. 7 is the schematic diagram that the present invention generates the 4th embodiment of plural frequency expansion sequence;
Fig. 8 is the schematic diagram that the present invention generates the 5th embodiment of plural frequency expansion sequence;
Fig. 9 is the schematic diagram that the present invention generates the 6th embodiment of plural frequency expansion sequence;
Figure 10 is the schematic diagram of the embodiment of the mapping relations of the present invention two between binary pseudo random sequence and constellation of complex figure;
Figure 11 is the schematic diagram of the embodiment of the mapping relations of the present invention three between binary pseudo random sequence and constellation of complex figure.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
Fig. 1 is the flow chart of spread processing method of the present invention, as shown in Figure 1, comprising:
Step 100: generate plural frequency expansion sequence according to two or more binary pseudo random sequence.
In this step, also comprise before the method and produce two or more binary pseudo random sequence, specifically comprise:
Two or more binary pseudo random sequence can be generated respectively by respective independently binary pseudo random sequence maker; Or,
Also can generate a binary pseudo random sequence by a binary pseudo random sequence maker, then according to the fractionation strategy pre-set, this binary pseudo random sequence be split two or more binary pseudo random sequence of formation.Wherein, split strategy to include but not limited to:
Serial to parallel conversion is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Fragmented storage is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Periodic sampling is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated.
Preferably, the length of each binary pseudo random sequence is identical with the length of the plural frequency expansion sequence of generation.
Generate plural frequency expansion sequence in this step to comprise: according to the mapping relations between two or more binary pseudo random sequence and constellation of complex figure, two or more binary pseudo random sequence are mapped to constellation of complex figure by turn jointly, and the sequence of complex numbers obtained forms plural frequency expansion sequence.Wherein,
Constellation of complex figure comprises the constellation point that two or more complex coordinates are formed, by system configuration or pre-set.Wherein, the mapping relations between two or more binary pseudo random sequence and constellation of complex figure are: the one-to-one relationship between the various value set of the component of two or more binary pseudo random sequence and each constellation point of constellation of complex figure.These mapping relations by system configuration or can pre-set.
Preferably, the binary pseudo random sequence in this step comprises the first binary pseudo random sequence and the second binary pseudo random sequence; So, generate plural frequency expansion sequence in this step to comprise:
Carry out phase deviation according to the phase pushing figure pre-set to the second binary pseudo random sequence, wherein, phase pushing figure is the real number between 0 to 2 π;
Sequence after carrying out phase deviation is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence.
Or,
According to the mapping relations between binary pseudo random sequence and phase sets, the second binary pseudo random sequence is mapped; Wherein, phase sets comprises two or more phase values between 0 to 2 π, by system configuration or pre-set; Mapping relations between binary pseudo random sequence and phase sets are the one-to-one relationship between each phase place in the various value of the component of binary pseudo random sequence and phase sets, by system configuration or pre-set;
Phase sequence after mapping is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence.
Two or more binary pseudo random sequence in this step are generated by binary pseudo random sequence maker, or are generated according to the pseudo random sequence mask of system configuration by binary pseudo random sequence maker, or by system configuration.
Preferably, this step also comprises: plural frequency expansion sequence is multiplied by normalization coefficient again and is normalized.Namely said, the plural frequency expansion sequence of generation is be multiplied by the plural frequency expansion sequence obtained after normalization coefficient is normalized.
Step 101: utilize the plural frequency expansion sequence generated to carry out spread processing to sent data symbol.
Also comprise before this step: after data bit carries out coded modulation, generate data symbol to be sent.
In this step, spread processing is that described data symbol to be sent carries out with each element of described plural frequency expansion sequence the process that complex multiplication forms the data symbol sequence identical with described plural spreading sequence length.The specific implementation of above-mentioned spread processing belongs to the known technology of those skilled in the art, and the protection range be not intended to limit the present invention, repeats no more here.
In this step, utilize the plural frequency expansion sequence generated to carry out spread processing to sent data symbol, also comprise: it can be different for carrying out to sent different pieces of information symbol the plural frequency expansion sequence that spread processing adopts.
Also comprise after the inventive method: formed after carrier modulation is carried out to the data symbol sequence after spread processing and transmit and send to receiver.Wherein, carrier modulation can be single-carrier modulated or multi-carrier modulation.
Also comprise after the inventive method: what receiver reception was launched from two or more transmitters transmits, adopt interference cancellation signals detector to carry out reception to the signal that multiple transmitter is launched and detect.Wherein, interference cancellation signals detector can be serial interference elimination (SIC, SuccessiveInterferenceCancellation) signal detector etc.
It should be noted that, those skilled in the art will know that, when two or more transmitters formed on identical running time-frequency resource respective transmit time, transmitting after on-air radio is propagated of two or more transmitters, the superposed signal of what receiver received is signal that two or more transmitters launch.
The inventive method adopts the plural frequency expansion sequence generated according to two or more binary pseudo random sequence to carry out spread processing to respective data symbol to be sent respectively by each transmitter, ensure that the low cross correlation between the difference plural number frequency expansion sequence that different transmitters adopts, again in conjunction with the interference cancellation signals detector that existing receiver adopts, effective signal distinguished each transmitter and launched, improve the effect of receiver interference elimination and the performance of nonopiate access multi-user reception detection, and then support higher system overload level, improve the nonopiate overload access of user and the experience communicated.
Fig. 2 is the composition connection diagram of spread processing device of the present invention, as shown in Figure 2, at least comprises generation module, spread processing module, wherein,
Generation module, for generating plural frequency expansion sequence according to two or more binary pseudo random sequence;
Spread processing module, carries out spread processing for utilizing the plural frequency expansion sequence of generation to sent data symbol.
Apparatus of the present invention also comprise: pretreatment module, after carrying out coded modulation to sent data bit, generate data symbol to be sent.
Also comprise transmitter module, transmit for being formed after carrying out carrier modulation to the data symbol sequence after spread processing and send to receiver.
Wherein, generation module specifically for: according to the mapping relations between two or more binary pseudo random sequence and constellation of complex figure, two or more binary pseudo random sequence are mapped to constellation of complex figure by turn jointly, and the sequence of complex numbers obtained forms plural frequency expansion sequence.Wherein,
Mapping relations between two or more binary pseudo random sequence and constellation of complex figure are: the one-to-one relationship between the various value set of the component of two or more binary pseudo random sequence and each constellation point of constellation of complex figure.These mapping relations by system configuration or can pre-set.
Wherein, constellation of complex figure comprises the constellation point that two or more complex coordinates are formed, by system configuration or pre-set.
Preferably, binary pseudo random sequence comprises the first binary pseudo random sequence and the second binary pseudo random sequence; So, generation module specifically for:
Carry out phase deviation according to the phase pushing figure pre-set to the second binary pseudo random sequence, wherein, phase pushing figure is the real number between 0 to 2 π; Sequence after carrying out phase deviation is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence.
Or,
According to the mapping relations between binary pseudo random sequence and phase sets, the second binary pseudo random sequence is mapped; Wherein, phase sets comprises two or more phase values between 0 to 2 π, by system configuration or pre-set; Mapping relations between binary pseudo random sequence and phase sets are the one-to-one relationship between each phase place in the various value of the component of binary pseudo random sequence and phase sets, by system configuration or pre-set; Phase sequence after mapping is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence.
Generation module also obtains the final plural frequency expansion sequence adopted for being multiplied by plural frequency expansion sequence after normalization coefficient is normalized.
Generation module, also for generating different plural frequency expansion sequences, carries out spread processing for supplying described spread processing module to sent different pieces of information symbol respectively.
Apparatus of the present invention also comprise generation module, for generating two or more binary pseudo random sequence.Particularly,
Generation module comprises two or more binary pseudo random sequence makers, specifically for: two or more binary pseudo random sequence can be generated respectively by respective independently binary pseudo random sequence maker.
Or, generation module comprises a binary pseudo random sequence maker, specifically for: this binary pseudo random sequence maker generates a binary pseudo random sequence, according to the fractionation strategy pre-set, this binary pseudo random sequence is split two or more binary pseudo random sequence of formation; Wherein, split strategy to include but not limited to:
Serial to parallel conversion is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Fragmented storage is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Periodic sampling is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated.
Spread processing device of the present invention can be arranged in transmitters, also can separately as a physical equipment.
Realize being described in detail to the present invention below in conjunction with specific embodiment.
Suppose that transmitter generates plural frequency expansion sequence according to two binary pseudo random sequence, and the length of two binary pseudo random sequence is identical with the length of plural frequency expansion sequence.Fig. 3 is the schematic diagram that the present invention generates the first embodiment of plural frequency expansion sequence, and Fig. 4 is the schematic diagram that the present invention generates the second embodiment of plural frequency expansion sequence.
As shown in Figure 3, two binary pseudo random sequence are independently generated by the binary pseudo random sequence maker of two in transmitter respectively: binary pseudo random sequence maker 1 generates first binary pseudo random sequence identical with plural spreading sequence length, and binary pseudo random sequence maker 2 generates second binary pseudo random sequence identical with plural spreading sequence length;
Or, as shown in Figure 4, two binary pseudo random sequence are formed after the binary pseudo random sequence generated by the binary pseudo random sequence maker of in transmitter splits according to fractionation strategy, this binary pseudo random sequence can form two binary pseudo random sequence identical with plural spreading sequence length after serial to parallel conversion or fragmented storage or periodic sampling, i.e. the first binary pseudo random sequence and the second binary pseudo random sequence.
Specifically, if adopt serial to parallel conversion mode, suppose that the length of the binary pseudo random sequence generated by the binary pseudo random sequence maker of in transmitter is the twice of plural spreading sequence length, and this binary pseudo random sequence element index initial value is set to 0, that is, the element of the even number position of this binary pseudo random sequence forms the first binary pseudo random sequence, and the element of the odd positions of this binary pseudo random sequence forms the second binary pseudo random sequence;
If adopt fragmented storage mode, suppose that the length of the binary pseudo random sequence generated by the binary pseudo random sequence maker of in transmitter is the twice of plural spreading sequence length, so, the element of this binary pseudo random sequence first half can be stored as the first binary pseudo random sequence, the element of this binary pseudo random sequence latter half is stored as the second binary pseudo random sequence;
If adopt periodic sampling mode, suppose that the length of the binary pseudo random sequence generated by the binary pseudo random sequence maker of in transmitter is many times of plural spreading sequence length, so, from this binary pseudo random sequence, element on a part of position can be taken out periodically as the first binary pseudo random sequence, in like manner take out element on another part position periodically as the second binary pseudo random sequence.
In the embodiment of two shown in Fig. 4, Fig. 5, the phase deviation each element of the second binary pseudo random sequence being carried out to 90 ° (or is multiplied by e
j pi/2) after, be added by turn with each element of the first binary pseudo random sequence and generate plural frequency expansion sequence, concrete as shown in formula (1):
ComplexSeq＝Seq1+Seq2
*e
jπ/2(1)
In formula (1), ComplexSeq represents plural frequency expansion sequence, and Seq1 represents the first binary pseudo random sequence, and Seq2 represents the second binary pseudo random sequence.Wherein, (or e is multiplied by the phase deviation that each element of Seq2 carries out 90 °
j pi/2) be equivalent to the imaginary part of Seq2 as ComplexSeq, and Seq1 is as the real part of ComplexSeq.
Citing, suppose that the second binary pseudo random sequence is for " 0,1,0,1,0,0,1,1 ", then, first " 0 " is expressed as " 1 ", " 1 " is expressed as "-1 ", and the second binary pseudo random sequence is transformed to " 1 ,-1,1 ,-1,1,1 ,-1 ,-1 "; Then 90 ° of phase deviations are carried out to each element of the second binary pseudo random sequence after conversion, be equivalent to be multiplied by e
j pi/2, obtain " e
j pi/2,-e
j pi/2, e
j pi/2,-e
j pi/2, e
j pi/2, e
j pi/2,-e
j pi/2,-e
j pi/2"; Suppose that the first binary pseudo random sequence is for " 1,0,0,1,1,0,1,0 ", is in like manner expressed as "-1,1,1 ,-1 ,-1,1 ,-1,1 " further; So, the two plural frequency expansion sequence being added generation is by turn: "-1+e
j pi/2, 1-e
j pi/2, 1+e
j pi/2,-1-e
j pi/2,-1+e
j pi/2, 1+e
j pi/2,-1-e
j pi/2, 1-e
j pi/2", this plural frequency expansion sequence can be expressed as further: "-1+j, 1-j, 1+j ,-1-j ,-1+j, 1+j ,-1-j, 1-j ".Further, normalization coefficient can be multiplied by the plural frequency expansion sequence generated to be normalized, the modulus value obtaining each element is the plural frequency expansion sequence of 1: " (-1+j)/sqrt (2); (1-j)/sqrt (2); (1+j)/sqrt (2); (-1-j)/sqrt (2); (-1+j)/sqrt (2); (1+j)/sqrt (2), (-1-j)/sqrt (2), (1-j)/sqrt (2) "; Or, obtain the plural frequency expansion sequence that sequence energy is 1: " (-1+j)/4; (1-j)/4; (1+j)/4; (-1-j)/4, (-1+j)/4, (1+j)/4; (-1-j)/4, (1-j)/4 ".Wherein, j represents imaginary unit, and sqrt () represents square root calculation.
Above-mentioned phase deviation also can get other values between 0 to 2 π, such as 270 ° (or 3 pi/2s) or-90 ° (or-pi/2s) or-270 ° (or-3 pi/2s) etc.
Fig. 5 is the schematic diagram of the composition embodiment of binary pseudo-random generator of the present invention, above-mentioned binary pseudo random sequence maker can be made up of linear feedback shift register, as shown in Figure 5, suppose that binary pseudo random sequence maker is made up of three grades of linear feedback shift registers (as the register 1 in Fig. 5, register 2 and register 3), be the binary pseudo random sequence of 7 for generating period, feedback function is expressed as f=c
0x
0+ c
1x
1+ c
2x
2+ c
3x
3, (c
0, c
1, c
2, c
3) be feedback factor, value is that 1 expression participates in feedback, and value is that 0 expression does not participate in feedback, (x
1, x
2, x
3) be respectively the value stored in three registers, x
0for feedback link c
0value.For three grades of linear feedback shift registers, c
0and c
3value be 1, accordingly, feedback link multinomial can be expressed as g=1+c
1x+c
2x
2+ x
3.For the binary pseudo random sequence maker of two in Fig. 3, i.e. binary pseudo random sequence maker 1 and binary pseudo random sequence maker 2, the two adopts different feedback functions or feedback link multinomial, and such as, binary pseudo random sequence maker 1 adopts feedback link multinomial g
1=1+x+x
3, then feedback factor is (1,1,0,1), and binary pseudo random sequence maker 2 adopts feedback link multinomial g
2=1+x
2+ x
3, then feedback factor is (1,0,1,1).It should be noted that, the initial condition (x of three registers
1, x
2, x
3) can not be set to (0,0,0).Clock in Fig. 5 is for controlling shift LD operation.
Suppose that transmitter generates plural frequency expansion sequence according to two binary pseudo random sequence, and the length of two binary pseudo random sequence is identical with the length of plural frequency expansion sequence.The generative process of two binary pseudo random sequence is described above.Fig. 6 is the schematic diagram that the present invention generates the 3rd embodiment of plural frequency expansion sequence, and Fig. 7 is the schematic diagram that the present invention generates the 4th embodiment of plural frequency expansion sequence.
In the embodiment of two shown in Fig. 6, Fig. 7, first, according to the mapping relations between binary pseudo random sequence and phase sets, phase mapping is carried out to the second binary pseudo random sequence and obtains phase sequence, then the phase sequence that the first binary pseudo random sequence and mapping obtain is added by turn and generates plural frequency expansion sequence, concrete as shown in formula (2):
ComplexSeq＝Seq1+SeqPhase(2)
In formula (2), ComplexSeq represents plural frequency expansion sequence, and Seq1 represents the first binary pseudo random sequence, and SeqPhase represents the phase sequence after the second binary pseudo random sequence mapping.
Citing, for binary bipolarity pseudo random sequence, its sequential element value comprises 1 and-1; Suppose to pre-set phase sets and comprise 90 ° of phase places (or e
j pi/2) and-90 ° of phase places (or e
-j pi/2), and hypothesis pre-sets sequential element value " 1 " is mapped as 90 ° of phase places (or e
j pi/2), sequential element value "-1 " is mapped as-90 ° of phase places (or e
-j pi/2).In the present embodiment, suppose that the second binary pseudo random sequence is for " 0,1,0,1,0,0,1,1 ", then, first " 0 " is expressed as " 1 ", " 1 " is expressed as "-1 ", and the second binary pseudo random sequence is transformed to " 1 ,-1,1 ,-1,1,1 ,-1 ,-1 "; Then according to the mapping relations between binary pseudo random sequence and phase sets, the second binary pseudo random sequence after conversion is mapped as phase sequence " e
j pi/2, e
-j pi/2, e
j pi/2, e
-j pi/2, e
j pi/2, e
j pi/2, e
-j pi/2, e
-j pi/2"; Suppose that the first binary pseudo random sequence is for " 1,0,0,1,1,0,1,0 ", be in like manner expressed as further "-1,1,1 ,-1 ,-1,1 ,-1,1 ", so, the plural frequency expansion sequence that the first binary pseudo random sequence and phase sequence are added generation is by turn: "-1+e
j pi/2, 1+e
-j pi/2, 1+e
j pi/2,-1+e
-j pi/2,-1+e
j pi/2, 1+e
j pi/2,-1+e
-j pi/2, 1+e
-j pi/2", this plural frequency expansion sequence can be expressed as further: "-1+j, 1-j, 1+j ,-1-j ,-1+j, 1+j ,-1-j, 1-j ".Same as above, normalization coefficient can also be multiplied by the plural frequency expansion sequence generated further to be normalized, the modulus value obtaining each element is the plural frequency expansion sequence of 1: " (-1+j)/sqrt (2); (1-j)/sqrt (2); (1+j)/sqrt (2); (-1-j)/sqrt (2); (-1+j)/sqrt (2); (1+j)/sqrt (2), (-1-j)/sqrt (2), (1-j)/sqrt (2) "; Or, obtain the plural frequency expansion sequence that sequence energy is 1: " (-1+j)/4; (1-j)/4; (1+j)/4; (-1-j)/4, (-1+j)/4, (1+j)/4; (-1-j)/4, (1-j)/4 ".Wherein, j represents imaginary unit, and sqrt () represents square root calculation.
Above-mentioned phase sets and the mapping relations between binary pseudo random sequence and phase sets also can by system configuration or preset be set to other forms, repeat no more here.
Suppose that transmitter generates plural frequency expansion sequence according to two binary pseudo random sequence, and the length of two binary pseudo random sequence is identical with the length of plural frequency expansion sequence.The generative process of two binary pseudo random sequence is described above.Fig. 8 is the schematic diagram that the present invention generates the 5th embodiment of plural frequency expansion sequence, and Fig. 9 is the schematic diagram that the present invention generates the 6th embodiment of plural frequency expansion sequence.
In the embodiment of two shown in Fig. 9, Figure 10, according to two mapping relations between binary pseudo random sequence and constellation of complex figure, first binary pseudo random sequence, the second binary pseudo random sequence are mapped to constellation of complex figure by turn jointly and generate plural frequency expansion sequence, concrete as shown in formula (3):
(Seq1
i,Seq2
i)—>ComplexSeq
i(3)
In formula (3), ComplexSeq
irepresent i-th value of plural frequency expansion sequence, according to the mapping relations between binary pseudo random sequence and constellation of complex figure by (Seq1
i, Seq2
i) map obtain, Seq1
irepresent i-th value of the first binary pseudo random sequence, Seq2
irepresent i-th value of the second binary pseudo random sequence.
Citing, for two binary bipolarity pseudo random sequences, its sequential element value comprises 1 and-1; Suppose to pre-set four constellation point that constellation of complex figure comprises four complex coordinates 1+j ,-1+j ,-1-j, 1-j are formed, and pre-set (Seq1
i, Seq2
i) value is mapped as plural 1+j when being (1,1), value is (-1,1) be mapped as plural number-1+j time, when value is (-1 ,-1), be mapped as plural number-1-j, value is mapped as plural 1-j when being (1 ,-1), as shown in Figure 10.In the present embodiment, suppose that the first binary pseudo random sequence is for " 1,0,0,1,1; 0,1,0 ", the second binary pseudo random sequence is " 0,1,0; 1,0,0,1,1 ", then, first " 0 " is expressed as " 1 ", " 1 " is expressed as "-1 ", is expressed as "-1,1,1 ,-1 ;-1,1 ,-1,1 " after the first binary pseudo random sequence conversion, is expressed as " 1 ,-1; 1 ,-1,1,1 ,-1 ,-1 " after the second binary pseudo random sequence conversion; Then, according to two mapping relations between binary pseudo random sequence and constellation of complex figure, by the first binary pseudo random sequence, the second binary pseudo random sequence, the constellation of complex point be jointly mapped to by turn on constellation of complex figure obtains sequence of complex numbers and is: "-1+j; 1-j; 1+j ,-1-j ,-1+j; 1+j ;-1-j, 1-j ", the plural frequency expansion sequence that namely this sequence generates.Same as above, normalization coefficient can also be multiplied by the plural frequency expansion sequence generated further to be normalized, the modulus value obtaining each element is the plural frequency expansion sequence of 1: " (-1+j)/sqrt (2); (1-j)/sqrt (2); (1+j)/sqrt (2); (-1-j)/sqrt (2); (-1+j)/sqrt (2); (1+j)/sqrt (2), (-1-j)/sqrt (2), (1-j)/sqrt (2) "; Or, obtain the plural frequency expansion sequence that sequence energy is 1: " (-1+j)/4; (1-j)/4; (1+j)/4; (-1-j)/4, (-1+j)/4, (1+j)/4; (-1-j)/4, (1-j)/4 ".Wherein, j represents imaginary unit, and sqrt () represents square root calculation.
Above-mentioned constellation of complex figure and two mapping relations between binary pseudo random sequence and constellation of complex figure also can be defined as other forms.
Can also define and there is constellation of complex figure that more constellation of complex point forms and more than the mapping relations between the binary pseudo random sequence of two and constellation of complex figure.Such as, as shown in figure 11, can jointly be mapped to constellation of complex figure by turn by three binary pseudo random sequence and generate plural frequency expansion sequence, concrete as shown in formula (4):
(Seq1
i,Seq2
i,Seq3
i)—>ComplexSeq
i(4)
In formula (4), ComplexSeq
irepresent i-th value of plural frequency expansion sequence, according to the mapping relations between binary pseudo random sequence and constellation of complex figure by (Seq1
i, Seq2
i, Seq3
i) map obtain, wherein, Seq1
irepresent i-th value of the first binary pseudo random sequence, Seq2
irepresent i-th value of the second binary pseudo random sequence, Seq3
irepresent i-th value of the 3rd binary pseudo random sequence.Detailed process is similar to the above, and record according to the present invention is that those skilled in the art easily realize, and repeats no more here.
Method described in above-described embodiment can also expand to other forms flexibly, and record according to the present invention is that those skilled in the art easily expect and realize, and repeats no more here.
Based on the above embodiment of the present invention, when embody rule, MC-CDMA system can be applied to, or contention access scene or exempt from scheduling access scene etc.:
For being applied to MC-CDMA system, transmitter generates plural frequency expansion sequence according to two or more binary pseudo random sequence, carry out spread processing to sent data symbol and obtain the data symbol sequence after spread spectrum, then the data symbol sequence after spread spectrum is carried out multi-carrier modulation, be mapped on multiple subcarrier, for the formation of transmitting, and send to receiver.Wherein, multiple transmitter can use identical frequency domain bandwidth or sub-carrier resources; Accordingly, after receiver receives the signal of multiple transmitter transmitting, adopt interference cancellation signals detector to carry out reception to the signal that multiple transmitter is launched and detect, obtain the data that each transmitter sends.When being applied to MC-CDMA system, pass through the inventive method, ensure that the multiple transmitters using identical running time-frequency resource effectively distinguished by receiver, thus effectively improve power system capacity, load more terminal access quantity under certain transmission rate condition, support higher system overload level, and then improve the nonopiate overload access of user and the experience communicated.
For being applied to contention access scene, multiple even a large number of users terminal can ask connecting system simultaneously, each transmitter adopts the plural frequency expansion sequence generated according to two or more binary pseudo random sequence to carry out spread processing to transmission data symbol, so, receiver adopts interference cancellation signals detector to carry out reception to the signal that each transmitter is launched and detects, achieve and effectively distinguish transmitting of each transmitter transmitting, thus support higher system overload level, effectively improve system access efficiency and terminal access experience.
Exempt from scheduling access scene for being applied to, user terminal needs to carry out transfer of data on available running time-frequency resource when sending data, there is multiple user terminal and uses identical running time-frequency resource to carry out the situation of transfer of data simultaneously; Each transmitter adopts the plural frequency expansion sequence generated according to two or more binary pseudo random sequence to carry out spread processing to transmission data symbol, and, receiver adopts interference cancellation signals detector to carry out reception to the signal of each terminal transmitter and detects, achieve the signal effectively distinguishing each terminal transmission, thus support higher system overload level, improve user terminal and exempt from scheduling access and the experience communicated, also reduce system call signaling simultaneously, reduce terminal transmission time delay.
The above, be only preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (24)
1. a spread processing method, is characterized in that, comprising: generate plural frequency expansion sequence according to two or more binary pseudo random sequence;
The plural frequency expansion sequence generated is utilized to carry out spread processing to sent data symbol.
2. spread processing method according to claim 1, is characterized in that, also comprise before the method: produce two or more binary pseudo random sequence described.
3. spread processing method according to claim 2, is characterized in that, two or more binary pseudo random sequence of described generation comprise: generated respectively by respective independently two or more binary pseudo random sequence makers.
4. spread processing method according to claim 2, is characterized in that, two or more binary pseudo random sequence of described generation comprise:
A binary pseudo random sequence is generated by a binary pseudo random sequence maker;
According to the fractionation strategy pre-set, the binary pseudo random sequence of this generation is split two or more binary pseudo random sequence of formation;
Wherein, the fractionation strategy pre-set comprises:
Serial to parallel conversion is carried out to form two or more binary pseudo random sequence to a binary pseudo random sequence of described generation;
Or, fragmented storage is carried out to form two or more binary pseudo random sequence to a binary pseudo random sequence of described generation;
Or, periodic sampling is carried out to form two or more binary pseudo random sequence to a binary pseudo random sequence of described generation.
5. method according to claim 2, is characterized in that, two or more binary pseudo random sequence of described generation comprise:
Generated by binary pseudo random sequence maker; Or, generated according to the pseudo random sequence mask of system configuration by binary pseudo random sequence maker; Or, by system configuration.
6. spread processing method according to claim 1 and 2, is characterized in that, the length of described each binary pseudo random sequence is identical with the length of the plural frequency expansion sequence of described generation.
7. spread processing method according to claim 1, is characterized in that, the plural frequency expansion sequence of described generation comprises:
According to the mapping relations between two or more binary pseudo random sequence and constellation of complex figure, two or more binary pseudo random sequence described are mapped to constellation of complex figure by turn jointly, the sequence of complex numbers obtained forms described plural frequency expansion sequence; Wherein,
Described mapping relations between two or more binary pseudo random sequence and constellation of complex figure are: the one-to-one relationship between the various value set of the component of two or more binary pseudo random sequence described and each constellation point of constellation of complex figure;
Described constellation of complex figure comprises the constellation point that two or more complex coordinates are formed.
8. spread processing method according to claim 1, is characterized in that, two or more binary pseudo random sequence described comprise the first binary pseudo random sequence and the second binary pseudo random sequence;
The plural frequency expansion sequence of described generation comprises:
Carry out phase deviation according to the phase pushing figure pre-set to the second binary pseudo random sequence, wherein, phase pushing figure is the real number between 0 to 2 π;
Sequence after carrying out phase deviation is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence.
9. spread processing method according to claim 1, is characterized in that, two or more binary pseudo random sequence described comprise the first binary pseudo random sequence and the second binary pseudo random sequence;
The plural frequency expansion sequence of described generation comprises:
According to the mapping relations between binary pseudo random sequence and phase sets, the second binary pseudo random sequence is mapped; Phase sequence after mapping is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence; Wherein,
Mapping relations between binary pseudo random sequence and phase sets are the one-to-one relationship between each phase place in the various value of the component of binary pseudo random sequence and phase sets; Wherein, phase sets comprises two or more phase values between 0 to 2 π.
10. the method according to any one of claim 7 ~ 9, is characterized in that, the method also comprises: described in the plural frequency expansion sequence that obtains be multiplied by normalization coefficient and be normalized.
11. spread processing methods according to claim 1 and 2, is characterized in that, the plural frequency expansion sequence described different pieces of information symbol to be sent being carried out to spread processing employing is different.
12. spread processing methods according to claim 1 and 2, is characterized in that, describedly also comprise before data symbol carries out spread processing: after data bit carries out coded modulation, generate described data symbol to be sent.
13. spread processing methods according to claim 1 and 2, is characterized in that, also comprise after the method: formed after carrying out carrier modulation to the data symbol sequence after described spread processing and transmit and send to receiver.
14. 1 kinds of spread processing devices, is characterized in that, at least comprise generation module, spread processing module, wherein,
Generation module, for generating plural frequency expansion sequence according to two or more binary pseudo random sequence;
Spread processing module, carries out spread processing for utilizing the plural frequency expansion sequence of generation to sent data symbol.
15. spread processing devices according to claim 14, is characterized in that, also comprise generation module, for generating two or more binary pseudo random sequence described.
16. spread processing devices according to claim 15, is characterized in that, described generation module comprises two or more binary pseudo random sequence makers; Specifically for:
Two or more binary pseudo random sequence described are generated respectively by respective independently binary pseudo random sequence maker.
17. spread processing devices according to claim 15, is characterized in that, described generation module comprises a binary pseudo random sequence maker; Specifically for:
This binary pseudo random sequence maker generates a binary pseudo random sequence, according to the fractionation strategy pre-set, this binary pseudo random sequence is split formation two or more binary pseudo random sequence described; Wherein, the fractionation strategy pre-set comprises:
Serial to parallel conversion is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Fragmented storage is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated; Or,
Periodic sampling is carried out to form two or more binary pseudo random sequence to the binary pseudo random sequence generated.
18. spread processing devices according to claim 14, it is characterized in that, described generation module specifically for: according to the mapping relations between two or more binary pseudo random sequence and constellation of complex figure, two or more binary pseudo random sequence described are mapped to constellation of complex figure by turn jointly, and the sequence of complex numbers obtained forms described plural frequency expansion sequence; Wherein,
Mapping relations between two or more binary pseudo random sequence and constellation of complex figure are: the one-to-one relationship between the various value set of the component of two or more binary pseudo random sequence described and each constellation point of constellation of complex figure; Wherein, constellation of complex figure comprises the constellation point that two or more complex coordinates are formed.
19. spread processing devices according to claim 14, is characterized in that, described binary pseudo random sequence comprises the first binary pseudo random sequence and the second binary pseudo random sequence;
Described generation module specifically for:
Carry out phase deviation according to the phase pushing figure pre-set to the second binary pseudo random sequence, wherein, phase pushing figure is the real number between 0 to 2 π; Sequence after carrying out phase deviation is added by turn with the first binary pseudo random sequence and obtains described plural frequency expansion sequence.
20. spread processing devices according to claim 14, is characterized in that, described binary pseudo random sequence comprises the first binary pseudo random sequence and the second binary pseudo random sequence;
Described generation module specifically for:
According to the mapping relations between binary pseudo random sequence and phase sets, the second binary pseudo random sequence is mapped; Phase sequence after mapping is added by turn with the first binary pseudo random sequence and obtains plural frequency expansion sequence; Wherein,
Mapping relations between binary pseudo random sequence and phase sets are the one-to-one relationship between each phase place in the various value of the component of binary pseudo random sequence and phase sets; Wherein, phase sets comprises two or more phase values between 0 to 2 π.
21. spread processing devices according to any one of claim 18 ~ 20, is characterized in that, described generation module also for, normalization coefficient is multiplied by the described plural frequency expansion sequence obtained and is normalized.
22. spread processing devices according to claims 14 or 15, is characterized in that, the plural frequency expansion sequence that described generation module generates is different;
Described spread processing module specifically for: for utilize the difference of generation plural number frequency expansion sequence carry out spread processing to sent different pieces of information symbol.
23. spread processing devices according to claims 14 or 15, is characterized in that, also comprise: pretreatment module, after carrying out coded modulation to sent data bit, generate described data symbol to be sent.
24. spread processing devices according to claims 14 or 15, is characterized in that, also comprise transmitter module, transmit for being formed after carrying out carrier modulation to the data symbol sequence after described spread processing and send to receiver.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107343321A (en) * | 2016-04-29 | 2017-11-10 | 中兴通讯股份有限公司 | Up-link access method and device, emitter, receiver, terminal |
| WO2017201704A1 (en) * | 2016-05-26 | 2017-11-30 | Nokia Technologies Oy | Codeword adaptation for non-orthogonal coded access |
| CN107612586A (en) * | 2017-09-28 | 2018-01-19 | 中国工程物理研究院电子工程研究所 | A kind of reconfigurable radio frequency spectrum spreading method based on programmable radio-frequency phase shifter |
| CN108023661A (en) * | 2016-10-31 | 2018-05-11 | 深圳市中兴微电子技术有限公司 | A kind of method and apparatus for obtaining pseudo-random sequence |
| WO2018130041A1 (en) * | 2017-01-12 | 2018-07-19 | 中兴通讯股份有限公司 | Multiple access method and apparatus, and communication system, and computer storage medium |
| CN108513699A (en) * | 2018-04-27 | 2018-09-07 | 北京小米移动软件有限公司 | The determination method and data de-scrambling method of the scrambled initialization sequence of data |
| WO2019007333A1 (en) * | 2017-07-03 | 2019-01-10 | 中兴通讯股份有限公司 | Method and apparatus for generating data |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1284226A (en) * | 1998-01-24 | 2001-02-14 | 摩托罗拉公司 | Method and system for generating complex pseudonoise sequence for processing code division multiple acess signal |
| CN1316142A (en) * | 1998-06-16 | 2001-10-03 | 艾利森电话股份有限公司 | Quadriphase spreading codes in code division multiple access communications |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1968029A (en) * | 2005-11-16 | 2007-05-23 | 弥亚微电子（上海）有限公司 | Spread-spectrum modulation and demodulation method by special spread spectrum sequence and device |
-
2014
- 2014-09-26 CN CN201410505511.9A patent/CN105515608A/en active Pending
-
2015
- 2015-04-28 WO PCT/CN2015/077700 patent/WO2016045384A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1284226A (en) * | 1998-01-24 | 2001-02-14 | 摩托罗拉公司 | Method and system for generating complex pseudonoise sequence for processing code division multiple acess signal |
| CN1316142A (en) * | 1998-06-16 | 2001-10-03 | 艾利森电话股份有限公司 | Quadriphase spreading codes in code division multiple access communications |
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| CN107343321A (en) * | 2016-04-29 | 2017-11-10 | 中兴通讯股份有限公司 | Up-link access method and device, emitter, receiver, terminal |
| US11368243B2 (en) | 2016-05-26 | 2022-06-21 | Nokia Technologies Oy | Codeword adaptation for non-orthogonal coded access |
| WO2017201704A1 (en) * | 2016-05-26 | 2017-11-30 | Nokia Technologies Oy | Codeword adaptation for non-orthogonal coded access |
| CN108023661A (en) * | 2016-10-31 | 2018-05-11 | 深圳市中兴微电子技术有限公司 | A kind of method and apparatus for obtaining pseudo-random sequence |
| CN108306707A (en) * | 2017-01-12 | 2018-07-20 | 中兴通讯股份有限公司 | A kind of method, apparatus and communication system of multiple access access |
| WO2018130041A1 (en) * | 2017-01-12 | 2018-07-19 | 中兴通讯股份有限公司 | Multiple access method and apparatus, and communication system, and computer storage medium |
| CN108306707B (en) * | 2017-01-12 | 2024-02-20 | 中兴通讯股份有限公司 | Method, device and communication system for multiple access |
| WO2019007333A1 (en) * | 2017-07-03 | 2019-01-10 | 中兴通讯股份有限公司 | Method and apparatus for generating data |
| CN109245796A (en) * | 2017-07-03 | 2019-01-18 | 中兴通讯股份有限公司 | A kind of method and device generating data |
| CN107612586A (en) * | 2017-09-28 | 2018-01-19 | 中国工程物理研究院电子工程研究所 | A kind of reconfigurable radio frequency spectrum spreading method based on programmable radio-frequency phase shifter |
| CN108513699A (en) * | 2018-04-27 | 2018-09-07 | 北京小米移动软件有限公司 | The determination method and data de-scrambling method of the scrambled initialization sequence of data |
| US11375477B2 (en) | 2018-04-27 | 2022-06-28 | Beijing Xiaomi Mobile Software Co., Ltd. | Method for determining scrambling initialization sequence of data and data descrambling method |
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