WO2017129128A1 - Procédé de modulation d'information et appareil - Google Patents

Procédé de modulation d'information et appareil Download PDF

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Publication number
WO2017129128A1
WO2017129128A1 PCT/CN2017/072588 CN2017072588W WO2017129128A1 WO 2017129128 A1 WO2017129128 A1 WO 2017129128A1 CN 2017072588 W CN2017072588 W CN 2017072588W WO 2017129128 A1 WO2017129128 A1 WO 2017129128A1
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WO
WIPO (PCT)
Prior art keywords
bit
constellation
information
modulation
bit sequence
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PCT/CN2017/072588
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English (en)
Chinese (zh)
Inventor
戴建强
袁志锋
唐红
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中兴通讯股份有限公司
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Publication of WO2017129128A1 publication Critical patent/WO2017129128A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/345—Modifications of the signal space to allow the transmission of additional information
    • H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
    • H04L27/3483—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel using a modulation of the constellation points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/345—Modifications of the signal space to allow the transmission of additional information
    • H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
    • H04L27/3472—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel by switching between alternative constellations

Definitions

  • This application relates to, but is not limited to, the field of wireless communication technology.
  • NOMA Non-Orthogonal Multiple Access
  • OMA Orthogonal Multiple Access
  • the modulation method of the base station to send the information is designed such that the base station performs superposition coding on multiple user information to obtain a composite constellation symbol.
  • a remote user and a near-end user are paired, and according to a set of modulation modes of the pair of users, combined with a transmission power ratio, a composite constellation is obtained, wherein the transmission power ratio is a near-end user modulation symbol. Power ratio.
  • the power transmission ratio is ⁇
  • the base station needs to configure all possible power transmission ratios according to the combination of all modulation modes. That is, the user equipment (User Equipment, UE for short) needs to demodulate an indeterminate composite constellation, thereby The demodulation performance is degraded.
  • the remote user needs to demodulate according to the power information notified by the base station.
  • the near-end user can use the Serial Interference Cancellation (SIC) technology, and the base station needs to notify the power information. Therefore, in the related art, the superposition coding mode on the base station side adds additional signaling overhead.
  • SIC Serial Interference Cancellation
  • the present invention provides an information modulation method and apparatus.
  • the embodiment of the present invention solves the corresponding relationship between the modulation mode and the transmission power ratio by a reasonable design, and solves the problem that the receiver needs to demodulate an indeterminate composite constellation in the related art, thereby causing demodulation. Performance degradation and increased signaling overhead.
  • An information modulation method comprising:
  • the transmitter performs modulation mapping on the first bit sequence according to a preset modulation mapping table and a transmission power ratio corresponding to the first bit sequence to generate a composite constellation; wherein the modulation mapping table includes multiple sets of bit sequences And a composite modulation symbol corresponding to each of said sets of bit sequences, each of said composite modulation symbols being used to represent a composite constellation.
  • the first bit sequence corresponds to one or more transmission power ratios, and each of the transmission power ratios corresponds to one composite constellation.
  • the transmitter performs modulation mapping on the bit sequence according to a preset modulation mapping table and a transmission power ratio corresponding to the first bit sequence, to generate a composite constellation, including:
  • the transmitter matches the first bit sequence with a plurality of sets of bit sequences in the modulation mapping table to obtain a second bit sequence
  • the transmitter performs modulation mapping on the first bit sequence according to a composite modulation symbol corresponding to the second bit sequence to generate the composite constellation.
  • the second bit sequence is one or more, and the number of the second bit sequences is the same as the number of transmission power ratios corresponding to the first bit sequence.
  • the bit information to be sent includes first bit information and second bit information; the transmitter synthesizes at least two sets of bit information to be sent into a first bit sequence, including:
  • the first bit sequence is b F (0)b F (1)...b F (m)b N (0)b N (1)...b N (n)
  • the first The bit information is b F (0)b F (1)...b F (m)
  • the second bit information is b N (0)b N (1)...b N (n)
  • m and the n are positive integers.
  • the first bit sequence is synthesized by first bit information with a bit number m+1 and second bit information with a bit number n+1; the number of points of the synthesized constellation is 2 m+n +2 , the number of bits of the first bit sequence is m+n+2, and the m and the n are positive integers.
  • the first bit sequence corresponds to a first transmission power ratio
  • the composite constellation is a 16-point composite constellation
  • the first bit sequence corresponds to a second transmission power ratio, and the composite constellation is a first 64-point synthesis constellation;
  • the first bit sequence corresponds to a third transmission power ratio, and the composite constellation is a second 64-point synthesis constellation;
  • the first bit sequence corresponds to a fourth transmission power ratio, and the composite constellation is a first 256-point composite constellation;
  • the first bit sequence corresponds to a fifth transmission power ratio
  • the composite constellation is a second 256-point composite constellation.
  • the contents of the two synthesized constellations are different.
  • the first bit sequence is synthesized by using first bit information and second bit information, where the synthesized modulation symbol is represented by: P F S F + P N S N ;
  • S F is the first bit of the complex symbols by modulating the information obtained by the S N is the second bit modulated complex symbols obtained information
  • said P F and P N is the weighting factor
  • ⁇ i is the power transfer ratio
  • the S F is the first bit of information in accordance with a first modulation complex symbol obtained by modulating, the first modulation scheme is quadrature phase shift keying QPSK, and 16 or a quadrature amplitude modulation QPSK One of the 16QAM.
  • the S N is a complex symbol obtained by modulating the second bit information by using the first bit information, and modulating the optimization result according to the second modulation manner;
  • the S N is a complex symbol obtained by optimizing the modulation result by using the first bit information after the second bit information is modulated according to the second modulation manner;
  • the second modulation mode is QPSK, 16QAM or 64QAM.
  • the correspondence between each constellation point and the bit information in the composite constellation is One or more sets.
  • An information modulation device is disposed in a transmitter, the information modulation device comprising:
  • a synthesizing module configured to: synthesize at least two sets of bit information to be sent into a first bit sequence, where the at least two sets of bit information are bit information sent to different receivers;
  • the modulation module is configured to: perform modulation mapping on the first bit sequence synthesized by the synthesis module according to a preset transmission mapping table and a transmission power ratio corresponding to the first bit sequence synthesized by the synthesis module, to generate a composite constellation;
  • the modulation mapping table includes a plurality of sets of bit sequences and composite modulation symbols corresponding to each of the sets of bit sequences, and each of the composite modulation symbols is used to represent a composite constellation.
  • the first bit sequence corresponds to one or more transmission power ratios, and each of the transmission power ratios corresponds to one composite constellation.
  • the modulation module includes: a matching unit and a modulation unit;
  • the matching unit is configured to: match the first bit sequence with a plurality of sets of bit sequences in the modulation mapping table to obtain a second bit sequence;
  • the modulating unit is configured to: perform modulation mapping on the first bit sequence according to a composite modulation symbol corresponding to the second bit sequence obtained by the matching unit, to generate the composite constellation.
  • the second bit sequence obtained by the matching unit is one or more, and the number of the second bit sequence is the same as the number of transmission power ratios corresponding to the first bit sequence.
  • the bit information to be sent includes first bit information and second bit information;
  • the synthesizing module synthesizes at least two sets of bit information to be sent into a first bit sequence, including:
  • the first bit sequence is b F (0)b F (1)...b F (m)b N (0)b N (1)...b N (n)
  • the first The bit information is b F (0)b F (1)...b F (m)
  • the second bit information is b N (0)b N (1)...b N (n)
  • m and the n are positive integers.
  • the first bit sequence is synthesized by first bit information with a bit number m+1 and second bit information with a bit number n+1; the number of points of the synthesized constellation is 2 m+n +2 , the number of bits of the first bit sequence is m+n+2, and the m and the n are positive integers.
  • the first bit sequence corresponds to a first transmission power ratio
  • the composite constellation is a 16-point composite constellation
  • the first bit sequence corresponds to a second transmission power ratio, and the composite constellation is a first 64-point synthesis constellation;
  • the first bit sequence corresponds to a third transmission power ratio, and the composite constellation is a second 64-point synthesis constellation;
  • the first bit sequence corresponds to a fourth transmission power ratio, and the composite constellation is a first 256-point composite constellation;
  • the first bit sequence corresponds to a fifth transmission power ratio
  • the composite constellation is a second 256-point composite constellation.
  • the contents of the two synthesized constellations are different.
  • the first bit sequence is synthesized by using first bit information and second bit information, where the synthesized modulation symbol is represented by: P F S F + P N S N ;
  • S F is the first bit of the complex symbols by modulating the information obtained by the S N is the second bit modulated complex symbols obtained information
  • said P F and P N is the weighting factor
  • ⁇ i is the power transfer ratio
  • the S F is the first bit of information in accordance with a first modulation complex symbol obtained by modulating, the first modulation scheme is quadrature phase shift keying QPSK, and 16 or a quadrature amplitude modulation QPSK One of the 16QAM.
  • the S N is a complex symbol obtained by modulating the second bit information by using the first bit information, and modulating the optimization result according to the second modulation manner;
  • the S N is a complex symbol obtained by optimizing the modulation result by using the first bit information after the second bit information is modulated according to the second modulation manner;
  • the second modulation mode is QPSK, 16QAM or 64QAM.
  • the correspondence between each constellation point and the bit information in the composite constellation is one or more sets.
  • a storage medium configured to: store the program code of the information modulation method according to any one of the above.
  • the transmitter combines at least two sets of bit information to be transmitted into a first bit sequence, and according to a preset modulation map and a transmission power ratio corresponding to the first bit sequence Performing modulation mapping on the first bit sequence to generate a composite constellation, wherein at least two sets of bit information are bit information sent to different receivers, and the modulation mapping table includes multiple sets of bit sequences and synthesized modulation symbols corresponding to each set of bit sequences, Each of the composite modulation symbols is used to represent a composite constellation.
  • the embodiment of the present invention implements, by using a preset modulation mapping table, generating a relatively determined composite constellation according to a corresponding transmission power ratio of the first bit sequence of the demodulation mapping;
  • the corresponding relationship between the modulation mode and the transmission power ratio is reasonably designed, and the problem that the receiver needs to demodulate an indeterminate composite constellation in the related art, resulting in demodulation performance degradation and signaling overhead is solved. .
  • Figure 1 is a constellation symbol obtained by QPSK modulation
  • 2 is a constellation symbol obtained by 16QAM modulation
  • 3 is a composite constellation obtained by a modulation scheme combining QPSK and 16QAM;
  • FIG. 5 is a flowchart of another information modulation method according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a composite constellation provided in Embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of another synthetic constellation provided in Embodiment 1 of the present invention.
  • FIG. 8 is a schematic diagram of a composite constellation provided in Embodiment 2 of the present invention.
  • Embodiment 9 is a schematic diagram of another synthetic constellation provided in Embodiment 2 of the present invention.
  • FIG. 10 is a schematic diagram of still another synthetic constellation provided in Embodiment 2 of the present invention.
  • FIG. 11 is a schematic diagram of still another synthetic constellation provided in Embodiment 2 of the present invention.
  • FIG. 12 is a schematic diagram of a simulation result in an information modulation method according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of another simulation result in an information modulation method according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of an information modulation apparatus according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of another information modulation apparatus according to an embodiment of the present invention.
  • the base station modulates the bit information according to Binary Phase Shift Keying (BPSK), QPSK, 16QAM, 64QAM or 256QAM modulation, and then maps the information to the time-frequency resource.
  • BPSK Binary Phase Shift Keying
  • the UE learns the modulation mode of the downlink information according to the Modulation and Coding Scheme (MCS) indicated in the Downlink Control Information (DCI), and may use the minimum mean square error (Minimum Mean Square Error). , referred to as: MMSE), Maximum Likelihood (ML) or other linear receiver or non-linear receiver demodulation and decoding.
  • MCS Modulation and Coding Scheme
  • DCI Downlink Control Information
  • MMSE Minimum mean square error
  • ML Maximum Likelihood
  • OMA technology is adopted in the 4th Generation Mobile Communication (4G) system in order to maintain the low cost of reception.
  • 4G 4th Generation Mobile Communication
  • 5G 5th Generation Mobile Communication
  • NOMA multiple access multiplexing method
  • NOMA technology only one user can be allocated a single radio resource, for example, divided by frequency or time division, and the NOMA mode can allocate one resource to multiple users.
  • the NOMA multiple access method using power multiplexing has obvious performance advantages over the OMA method in related technologies, and is more suitable. Deployment of future systems.
  • FIG. 1 to FIG. 3 For the application scenario of the NOMA system as described in the background, please refer to FIG. 1 to FIG. 3, FIG.
  • FIG. 2 For the constellation symbols obtained by the QPSK modulation method
  • FIG. 2 is a constellation symbol obtained by a 16QAM modulation method
  • FIG. 3 is a composite constellation obtained by a modulation method of a combination of QPSK and 16QAM.
  • the composite constellation shown in Figure 3 it can be seen that the four constellation groups are scattered in four quadrants; in addition, the smaller the transmission power ratio is, the more the constellation points are scattered, and when the superposition method is different, each of the generated synthetic constellations
  • the bit information carried by the constellation points is also different.
  • the data symbols mapped to the time-frequency resources are not BPSK, QPSK, 16QAM, 64QAM or 256QAM modulation symbols of a single user, but an indeterminate synthetic constellation symbol generated by superposition coding. Obviously, demodulating this indeterminate synthetic constellation symbol may introduce increased signaling overhead and may cause degradation in demodulation performance.
  • the transmitter in the following embodiments of the present invention may be, for example, a base station in a NOMA system
  • the receiver may be, for example, a UE in a NOMA system.
  • the present invention is provided to be able to combine the following embodiments, and the same or similar concepts or processes may not be described in some embodiments.
  • FIG. 4 is a flowchart of an information modulation method according to an embodiment of the present invention.
  • the information modulation method provided in this embodiment is applicable to the case where paired modulation is performed in the NOMA system, and the method can be implemented by an information modulation device, which is implemented by a combination of hardware and software, and the device can be integrated in the transmission.
  • the processor of the machine it is used by the processor to call.
  • the method in the embodiment of the present invention may include the following steps, that is, S110-S120:
  • the transmitter synthesizes at least two sets of bit information to be sent into a first bit sequence, where the at least two sets of bit information are bit information sent to different receivers.
  • the information modulation method provided by the embodiment of the present invention can be applied to a NOMA system.
  • the feature of the NOMA system is that the transmitter can allocate one resource to multiple receivers. Therefore, the transmitter sends the modulation symbols to multiple receivers.
  • the bit information to be transmitted to multiple receivers may be combined and modulated first.
  • bit information sent to different receivers is synthesized before performing modulation to generate a first bit sequence, for example, a set of combined bit information.
  • the bit information to be transmitted by the transmitter includes first bit information and second bit information, wherein the first bit information is sent to the remote receiver, and the content is, for example: b F (0) b F (1 )...b F (m), the second bit information is sent to the near-end receiver, and the content is, for example, b N (0)b N (1)...b N (n), after the synthesis
  • a bit sequence is: b F (0)b F (1)...b F (m)b N (0)b N (1)...b N (n).
  • the transmitter performs modulation mapping on the first bit sequence according to a preset modulation mapping table and a transmission power ratio corresponding to the first bit sequence to generate a composite constellation.
  • the modulation mapping table includes multiple sets of bit sequences and each group of bit sequences. Corresponding composite modulation symbols, each synthesized modulation symbol used to represent a composite constellation.
  • the modulation mapping table may be a modulation mapping relationship pre-configured inside the transmitter, where the modulation mapping table is used to instruct the transmitter to map the first bit sequence to a composite constellation according to a preset modulation rule.
  • the preset modulation rule includes a transmission power ratio corresponding to the first bit sequence and a composite modulation symbol; for example, a plurality of sets of bit sequences are arranged in the modulation mapping table, and a correspondence relationship between each set of bit sequences and the synthesized modulation symbols is configured.
  • the modulation mapping table may have the same bit sequence, that is, two identical bit sequences have different transmission power ratios, The transmission power ratios correspond to different composite modulation symbols, and therefore, different composite constellations are generated according to each transmission power ratio, and each composite modulation symbol can represent a different composite constellation.
  • the content of the modulation mapping table in this embodiment is as shown in Table 1:
  • the bit sequence in each embodiment of the present invention can be expressed as: b F (0) b F (1).. .b F (m)b N (0)b N (1)...b N (n), when the values of m and n are different, the number of bits of the bit sequence and the constellation points of the corresponding composite constellation are different.
  • the composite modulation symbol can be expressed as: P F S F + P N S N , where P F and P N are weighting factors, and the value of the weighting factor is obtained by the transmission power ratio, wherein
  • the bit sequence of each row corresponds to different transmission power ratios and synthetic modulation symbols, however, the bit sequence may have the same bit information, such as the bit sequence b F (0)b F (1) b N (0)b N (1)b N (2)b N (3) corresponds to two transmission power ratios, namely ⁇ 1 and ⁇ 2 , and each transmission power ratio corresponds to a different composite modulation symbol, namely ⁇ 1 and ⁇ 2 has a one-to-one correspondence with the synthesized modulation symbols.
  • bit sequence and the composite modulation symbol shown in Table 1 are similarly illustrated by combining two sets of bit information and performing modulation mapping.
  • the first embodiment of the present invention does not limit the first.
  • the bit sequence is synthesized by only two sets of bit information, for example, three or four groups.
  • the transmitter can generate a one-to-one corresponding composite constellation according to the transmission power ratio.
  • the composite constellation generated by the embodiment of the present invention corresponds to the first bit sequence and the first bit sequence, in comparison with the related art, in which the transmitter needs to be combined according to all the modulation modes, and the superposition coding manners of all the possible transmission power ratios are respectively configured.
  • a few transmission power ratios are related, that is, a relatively determined composite constellation can be generated in the embodiment of the present invention. Therefore, the transmitter does not need to transmit power information to the receiver, thereby avoiding additional signaling overhead caused by demodulating the synthesized constellation;
  • the receiver in the embodiment of the present invention demodulates the relatively determined composite constellation, the demodulation mode is simpler, and the demodulation performance is close to the optimal performance that can be achieved under multiple transmission power ratios.
  • the transmitter combines at least two sets of bit information to be transmitted into a first bit sequence, and according to a preset modulation map and a transmission power ratio corresponding to the first bit sequence,
  • the first bit sequence is subjected to modulation mapping to generate a composite constellation, wherein at least two sets of bit information are bit information transmitted to different receivers, and the modulation mapping table includes a plurality of sets of bit sequences and synthesized modulation symbols corresponding to each set of bit sequences, each The composite modulation symbol is used to represent a composite constellation.
  • the embodiment of the present invention implements a preset modulation constellation table to generate a relatively determined composite constellation according to a corresponding transmission power ratio of the first bit sequence of the demodulation mapping;
  • the embodiment solves the problem that the receiver needs to demodulate an indeterminate composite constellation in a related art, and the demodulation performance is degraded, and the signaling overhead is increased by a reasonable design combination of the modulation mode and the transmission power ratio.
  • the number of transmission power ratios corresponding to the first bit sequence may be one or more. Therefore, when performing S120, the transmitter may generate different according to different transmission power ratios.
  • the composite constellation that is to say, the transmission power ratio has a one-to-one correspondence with the synthesized constellation in the case where the bit sequence is determined.
  • FIG. 5 is a flowchart of another information modulation method according to an embodiment of the present invention.
  • S120 in this embodiment may include the following steps, that is, S121 to S122:
  • the transmitter matches the first bit sequence with the plurality of groups of bit sequences in the modulation mapping table to obtain a second bit sequence.
  • the transmitter performs modulation mapping on the first bit sequence according to the composite modulation symbol corresponding to the second bit sequence to generate a composite constellation.
  • the first bit sequence in the embodiment of the present invention is a bit sequence that the transmitter needs to perform modulation mapping
  • the second bit sequence is a result that the first bit sequence is matched in the modulation mapping table, that is, the first bit sequence and the second bit sequence.
  • the content is the same, but the number of second bit sequences may be one or more, and the number of the second bit sequences is the same as the number of transmission powers corresponding to the first bit sequence.
  • the modulation map shown in Table 1 is also taken as an example.
  • the transmission power ratio corresponding to the first bit sequence is ⁇ 0 ; if the first bit sequence is b F (0) b F (1) b N (0) b N (1) b N (2) b N ( 3) The number of matched second bit sequences is two, and the transmission power ratio corresponding to the first bit sequence is ⁇ 1 and ⁇ 2 .
  • the embodiment of the present invention is also illustrated by taking the case of combining two sets of bit information and performing modulation mapping.
  • the S110 in the foregoing embodiment shown in FIG. 4 and FIG. 5 may be replaced by: the transmitter synthesizes the first bit information with the number of bits m+1 and the second bit information with the number of bits n+1 into the number of bits.
  • a first bit sequence of m+n+2 and referring to the modulation mapping table shown in Table 1 above, ⁇ 0 , ⁇ 1 , . . . , ⁇ k ⁇ in Table 1 is used as a transmission power ratio set, each The transmission power ratio has a unique corresponding composite constellation.
  • the first bit sequence in the embodiment of the present invention may be expressed as: b F (0)b F (1)...b F (m)b N (0)b N (1)...b N (n)
  • the first bit information can be expressed as: b F (0) b F (1)...b F (m)
  • the second bit information can be expressed as: b N (0)b N (1)... b N (n), where m and n are positive integers.
  • the number of bits of the first bit sequence is m+n+2
  • the number of points of the synthesized constellation is 2 m+n+2
  • m +1 and n+1 represent the order of the paired modulation mode uniquely corresponding to the transmission power ratio, which are m+1 order modulation and n+1 order modulation, respectively.
  • the first bit sequence corresponds to the first transmission power ratio ⁇ 0
  • the paired modulation mode is QPSK and QPSK
  • the generated composite constellation is a 16-point composite constellation.
  • the first bit sequence corresponds to the second transmission power ratio ⁇ 1
  • the paired modulation mode is QPSK and 16QAM
  • the generated composite constellation is the first 64-point synthesis constellation.
  • the first bit sequence corresponds to the third transmission power ratio ⁇ 2
  • the paired modulation mode is QPSK and 16QAM
  • the generated composite constellation is the second 64-point synthesized constellation
  • the number of points of the synthesized constellation is the same, and the bit information of the first bit sequence is also the same, but the transmission power ratio corresponding to the first bit sequence is different, and therefore, the generated The composite constellation is different, that is, the relationship between the synthesized constellation and the transmission power ratio is one-to-one correspondence in the case where the bit sequence is determined.
  • the first bit sequence corresponds to the fourth transmission power ratio ⁇ 3
  • the paired modulation mode is QPSK and 64QAM
  • the generated composite constellation is the first 256-point composite constellation.
  • the first bit sequence corresponds to the fifth transmission power ratio ⁇ 4
  • the paired modulation mode is 16QAM and 16QAM
  • the generated composite constellation is the second 256-point composite constellation
  • the composite modulation symbol can be expressed as P F S F + P N S N , where P F and P N are weighting factors, and
  • the S F is a first bit information b F (0) b F (1)...b F (m) is a complex symbol modulated according to the first modulation mode, and the S F may be Expressed as I F +jQ F , the first modulation mode is QPSK, or one of QPSK and 16QAM.
  • the first modulation mode is QPSK or 16QAM; however, Table 1 is only one possible mapping relationship of the modulation mapping table in the embodiment of the present invention, in the NOMA system.
  • the modulation mapping table configured for the transmitter may also be other content, for example, not including the content of the last row of Table 1. In this case, the first modulation mode is QPSK.
  • S N is a complex symbol obtained by the second bit information b N (0) b N (1)...b N (n) in the following manner:
  • the second bit information b N (0)b N (1)...b N (n) is performed by the first bit information b F (0)b F (1)...b F (m)
  • the optimization result is modulated according to the second modulation method to obtain a complex symbol S N .
  • the second bit information b N (0)b N (1)...b N (n) is passed through the first bit information b F (0)b F (1)...b F (m)
  • the result of the optimization is: c N (0)c N (1)...c N (n);
  • the optimization result c N (0)c N (1)...c N (n) is modulated according to the second modulation mode to obtain a complex symbol S N , and the second modulation mode in the embodiment of the present invention may be QPSK, 16QAM or 64QAM.
  • the first bit information b F (0)b F (1) is passed.
  • ...b F (m) optimizes the modulation result to obtain the complex symbol S N .
  • the second modulation mode in the embodiment may be QPSK, 16QAM or 64QAM, and the modulation result I N +jQ N is performed by the first bit information b F (0)b F (1)...b F (m).
  • the optimized complex symbol S N can be expressed as:
  • the S N in the embodiment of the present invention may also be expressed as:
  • S N The above different expressions of S N are alternatively used, and one of the expressions of S N may be selected in the modulation protocol of the NOAM system to generate a corresponding composite constellation.
  • the correspondence between each constellation point and the bit information in the composite constellation is It may be one or more sets, wherein the correspondence between the constellation points and the bit information is determined by the expression of the above S N , and when the different expressions of S N are selected, the bit information of the constellation points in the generated composite constellation is different.
  • the actual application of generating a composite constellation according to the modulation map shown in Table 1 is explained below by several implementation examples.
  • FIG. 6 is a schematic diagram of a composite constellation provided in Embodiment 1 of the present invention
  • FIG. 7 is a schematic diagram of another synthetic constellation provided in Embodiment 1 of the present invention.
  • the modulation mapping relationship of the composite constellation can be represented by the modulation mapping table 2.
  • the modulation mapping table 2 also includes two parts, one part is a bit sequence, and the other part is a composite modulation symbol corresponding to the bit sequence, as shown in Table 2:
  • the transmission power ratio is ⁇ 0
  • the bit sequence is b F (0) b F (1)b N (0)b N (1)
  • the composite modulation symbol is ⁇ 0 is the corresponding unique complex symbol. That is, P F S F + P N S N , where P F and P N are weighting factors, which are obtained by the transmission power ratio ⁇ 0 ,
  • the present exemplary embodiment of a first bit information S F b F (0) b F ( 1) the complex symbols modulated by a first modulation obtained
  • the present first exemplary embodiment of a One modulation method is QPSK.
  • the optimization result is modulated according to the second modulation mode to obtain a complex symbol S. N.
  • the result of optimizing the second bit information b N (0)b N (1) by the first bit information b F (0)b F (1) is: c N (0)c N (1) );
  • the above optimization result c N (0)c N (1) is modulated according to the second modulation method to obtain a complex symbol S N , and the second modulation method in the first embodiment is QPSK.
  • the modulation result is optimized by the first bit information b F (0)b F (1) to obtain a complex symbol. S N .
  • the complex symbol obtained by modulating the second bit information b N (0)b N (1) according to the second modulation method is, for example, I N +jQ N , and the second modulation method in the first embodiment.
  • the above modulation result I N +jQ N is optimized by the first bit information b F (0)b F (1), and the optimized complex symbol S N can be expressed as:
  • S N The above different expressions of S N are alternatively used, and one of the expressions of S N may be selected in the modulation protocol of the NOAM system to generate a corresponding composite constellation.
  • the distance between adjacent constellation points in the composite constellation may be equal, that is, the constellation points are uniformly distributed, as shown in FIG. 6; or, between the adjacent constellation points in the composite constellation
  • the distances may also be unequal, that is, the constellation points are unevenly distributed, as shown in FIG.
  • the expression determined constellation point and the corresponding relationship information bits N by the S, synthesized constellation shown in FIG. 6 and FIG. 7, the correspondence relationship between bit information of constellation points are identical, both the first by a S
  • the synthesized constellation generated by the expression of N for example, the bit information carried in the constellation points in the upper right corner of FIGS. 6 and 7 is “0011”, and the bit information carried by other corresponding constellation points is also the same, and is not represented in FIG. 6. Bit information of other constellation points.
  • FIG. 8 is a schematic diagram of a composite constellation provided in Embodiment 2 of the present invention
  • FIG. 9 is a schematic diagram of another synthetic constellation provided in Embodiment 2 of the present invention.
  • the modulation mapping relationship of the composite constellation can be represented by the modulation mapping table 3, and the modulation mapping table 3 is the same
  • the sample includes two parts, one part is a bit sequence, and the other part is a composite modulation symbol corresponding to the bit sequence, as shown in Table 3:
  • the transmission power ratio is ⁇ 1
  • the bit sequence is b F (0) b F (1) b N (0) b N (1) b N (2) b N (3)
  • the synthesis modulation symbol Let ⁇ 1 be the corresponding unique complex symbol, that is, P F S F + P N S N , where P F and P N are weighting factors, which are obtained by the transmission power ratio ⁇ 1 ,
  • the present exemplary embodiment two of the first bit information S F b F (0) b F ( 1) the complex symbols modulated by a first modulation obtained in the present exemplary embodiment of the two One modulation method is QPSK.
  • the second bit information b N (0)b N (1)b N (2)b N (3) is optimized by the first bit information b F (0)b F (1), and the optimization result is obtained.
  • the complex symbol S N is obtained by modulation according to the second modulation method.
  • the result of optimizing the second bit information b N (0)b N (1)b N (2)b N (3) by the first bit information b F (0)b F (1) is :c N (0)c N (1)c N (2)c N (3);
  • the first bit information b F (0)b F ( 1) Optimize the modulation result to obtain the complex symbol S N .
  • the complex symbol obtained by modulating the second bit information b N (0)b N (1)b N (2)b N (3) according to the second modulation method is, for example, I N +jQ N
  • the second modulation mode in the second embodiment is 16QAM
  • the modulation result I N +jQ N is optimized by the first bit information b F (0)b F (1)
  • the optimized complex symbol S N can be represented. for:
  • S N The above different expressions of S N are alternatively used, and one of the expressions of S N may be selected in the modulation protocol of the NOAM system to generate a corresponding composite constellation.
  • the distance between adjacent constellation points in the composite constellation may be equal, that is, the constellation points are uniformly distributed, as shown in FIG. 8; or, between adjacent constellation points in the composite constellation
  • the distances may also be unequal, ie the constellation points are unevenly distributed, as shown in FIG.
  • the correspondence relationship between bit information constellation point determined by the above-described expression S N, synthetic constellation, constellation points corresponding relationship between the bit information is shown in FIGS. 8 and 9 the same, all the first by a S
  • the synthesized constellation generated by the expression of N for example, the bit information carried in the constellation point in the upper right corner of FIGS. 8 and 9 is "001111", and the bit information carried by other corresponding constellation points is also the same, in FIG. 8 and FIG. The bit information of other constellation points is not shown.
  • the correspondence between the constellation point and the bit information in the composite constellation may also be different from the synthesized constellation shown in FIG. 8 and FIG. 9, please refer to FIG. 10 and FIG. 10 is a schematic diagram of still another synthetic constellation provided in Embodiment 2 of the present invention, and FIG. 11 is a schematic diagram of still another synthetic constellation provided in Embodiment 2 of the present invention, wherein the distance between adjacent constellation points in the synthesized constellation may be Is equal, that is, the constellation points are uniformly distributed, as shown in FIG. 10; or, the distance between adjacent constellation points in the composite constellation may also be unequal, that is, the constellation points are unevenly distributed, as shown in FIG. 11; In the composite constellation shown in FIG. 10 and FIG.
  • the correspondence between the constellation points and the bit information is the same, and both are synthetic constellations generated by the expression of the second S N described above, for example, in the upper right corner of FIGS. 10 and 11.
  • the bit information carried by the constellation points is "000011", and the bit information carried by other corresponding constellation points is also the same.
  • the bit information of other constellation points is not shown in FIG. 10 and FIG. Comparing with FIG. 10 and FIG. 11, and FIG. 8 and FIG. 9, although the number of constellation points and the paired modulation mode are the same, since different S N expressions are used, the constellation points and bit information of the synthesized constellation are generated.
  • the correspondence is different.
  • the designer can configure the expressions that are different for S N to generate the desired composite constellation.
  • the present invention only illustrates the bit sequence and transmission work through the above two implementation examples.
  • the bit sequence in the embodiment of the present invention may be other situations, and the actual mapping manner is the same as that in the foregoing embodiment, and therefore no further details are provided herein.
  • the generated composite constellation may have, for example, a Gray mapping attribute, that is, bit information of any adjacent constellation points in the composite constellation is only one bit different.
  • FIG. 12 is a schematic diagram of a simulation result in an information modulation method according to an embodiment of the present invention
  • FIG. 12 is a diagram showing information provided by any of the foregoing embodiments of the present invention in a full-load (Full Buffer, FB) service mode.
  • Full Buffer, FB Full-load
  • a comparison diagram of a simulation method and a simulation result obtained by using the solution in the related art is easily seen from FIG. 12, and the performance of the information modulation method provided by the embodiment of the present invention is very close to the solution in the related art;
  • FIG. 13 is provided in the embodiment of the present invention.
  • FIG. 13 shows that in the file transfer protocol (FTP) service mode, when the resource utilization rate is 80%, any of the above embodiments of the present invention are respectively used.
  • FTP file transfer protocol
  • the information modulation method provided by the embodiment of the present invention has the beneficial effects that the transmitter does not need to transmit power information to the receiver, and avoids additional signaling overhead caused by demodulating the synthesized constellation; in addition, the receiver demodulates in the embodiment of the present invention. Compared with the determined composite constellation, the demodulation mode is simpler, and the demodulation performance is close to the optimal performance that can be achieved under various transmission power ratios.
  • FIG. 14 is a schematic structural diagram of an information modulation apparatus according to an embodiment of the present invention.
  • the information modulation method provided in this embodiment is applicable to the case where paired modulation is performed in the NOMA system, and the information modulation device is implemented by a combination of hardware and software, and the device can be integrated in a processor of the transmitter for the processor. Called for use.
  • the information modulation apparatus of this embodiment may include a synthesis module 11 and a modulation module 12.
  • the synthesizing module 11 is configured to synthesize at least two sets of bit information to be sent into a first bit sequence, where the at least two sets of bit information are bit information sent to different receivers.
  • the information modulation apparatus provided by the embodiment of the present invention is also applied to the NOMA system, and is characterized in that the transmitter can allocate one resource to multiple receivers. Therefore, before transmitting the modulation symbols to multiple receivers, the transmitter may first The bit information to be transmitted to a plurality of receivers is combined and modulated.
  • the bit information to be transmitted by the transmitter includes the first bit information and the second bit information as an example.
  • the first bit information is sent to the remote receiver, and the second bit information is sent to the near-end receiver.
  • the contents of the first bit information, the second bit information, and the first bit sequence are the same as those of the foregoing embodiment, and thus are not described herein again.
  • the modulation module 12 is configured to: perform modulation mapping on the first bit sequence synthesized by the synthesis module 11 according to a preset modulation mapping table and a transmission power ratio corresponding to the first bit sequence, to generate a composite constellation; wherein the modulation mapping table includes multiple A group bit sequence and a composite modulation symbol corresponding to each group of bit sequences, each synthesized modulation symbol being used to represent a composite constellation.
  • the modulation mapping table may be a modulation mapping relationship pre-configured in the transmitter, and the modulation mapping table is used to instruct the modulation module 12 to map the first bit sequence to a composite constellation according to a preset modulation rule.
  • the preset modulation rule includes a transmission power ratio corresponding to the first bit sequence and a composite modulation symbol.
  • the related content of the modulation mapping table in this embodiment, and the corresponding relationship are the same as those in the foregoing embodiment, and the modulation mapping table shown in Table 1 can also be referred to, and therefore no further details are provided herein.
  • bit sequence and the composite modulation symbol shown in Table 1 are similarly illustrated by combining two sets of bit information and performing modulation mapping.
  • the first embodiment of the present invention does not limit the first.
  • the bit sequence is synthesized by only two sets of bit information, for example, three or four groups. As long as the combined bit sequence is configured with an appropriate number of transmission power ratios, the transmitter can generate a one-to-one corresponding composite constellation according to the transmission power ratio.
  • the information modulating device provided by the embodiment of the present invention is used to perform the information modulating method provided by the embodiment shown in FIG. 4 of the present invention, and has a corresponding functional module, and the implementation principle and the technical effect thereof are similar, and details are not described herein again.
  • the number of transmission power ratios corresponding to the first bit sequence may be one or more. Therefore, when performing modulation mapping, the modulation module 12 may generate according to different transmission power ratios. Different synthetic constellations, that is to say, in the case where the bit sequence is determined, the transmission power ratio has a one-to-one correspondence with the synthesized constellation.
  • FIG. 15 is a schematic structural diagram of another information modulating apparatus according to an embodiment of the present disclosure.
  • the modulation module 12 in this embodiment includes: a matching unit 13 on the basis of the structure of the information modulating apparatus shown in FIG. And modulation unit 14.
  • the matching unit 13 is configured to: match the first bit sequence with the plurality of groups of bit sequences in the modulation mapping table to obtain a second bit sequence;
  • the modulating unit 14 is configured to perform modulation mapping on the first bit sequence according to the composite modulation symbol corresponding to the second bit sequence obtained by the matching unit 13, to generate a composite constellation.
  • the first bit sequence in the embodiment of the present invention is a bit sequence that the transmitter needs to perform modulation mapping
  • the second bit sequence is a result that the first bit sequence is matched in the modulation mapping table, that is, the first bit sequence and the second bit sequence.
  • the content is the same, but the number of second bit sequences may be one or more, and the number of the second bit sequences is the same as the number of transmission powers corresponding to the first bit sequence.
  • the modulation map shown in Table 1 is also taken as an example.
  • the transmission power ratio corresponding to the first bit sequence is ⁇ 0 ; if the first bit sequence is b F (0) b F (1) b N (0) b N (1) b N (2) b N ( 3) The number of matched second bit sequences is two, and the transmission power ratio corresponding to the first bit sequence is ⁇ 1 and ⁇ 2 .
  • the information modulating device provided by the embodiment of the present invention is used to perform the information modulating method provided by the embodiment shown in FIG. 5 of the present invention, and has a corresponding functional module, and the implementation principle and the technical effect thereof are similar, and details are not described herein again.
  • the embodiment of the present invention is also illustrated by taking the case of combining two sets of bit information and performing modulation mapping.
  • the synthesizing module 11 in the information modulating device shown in FIG. 14 and FIG. 15 synthesizes at least two sets of bit information to be transmitted into the first bit sequence, which may include: first bit having the number of bits being m+1
  • the first bit sequence in the embodiment of the present invention may be expressed as: b F (0)b F (1)...b F (m)b N (0)b N (1)...b N (n)
  • the first bit information can be expressed as: b F (0) b F (1)...b F (m)
  • the second bit information can be expressed as: b N (0)b N (1)... b N (n), where m and n are positive integers.
  • the number of bits of the first bit sequence is m+n+2
  • the number of points of the synthesized constellation is 2 m+n+2
  • m +1 and n+1 represent the order of the paired modulation mode uniquely corresponding to the transmission power ratio, which are m+1 order modulation and n+1 order modulation, respectively.
  • the embodiment of the present invention illustrates the pairing tone shown in Table 1 by using different values of m and n.
  • Table 1 illustrates the pairing tone shown in Table 1 by using different values of m and n.
  • the first bit sequence corresponds to the first transmission power ratio ⁇ 0
  • the paired modulation mode is QPSK and QPSK
  • the generated composite constellation is a 16-point composite constellation.
  • the first bit sequence corresponds to the second transmission power ratio ⁇ 1
  • the paired modulation mode is QPSK and 16QAM
  • the generated composite constellation is the first 64-point synthesis constellation.
  • the first bit sequence corresponds to the third transmission power ratio ⁇ 2
  • the paired modulation mode is QPSK and 16QAM
  • the generated composite constellation is the second 64-point synthesized constellation
  • the number of points of the synthesized constellation is the same, and the bit information of the first bit sequence is also the same, but the transmission power ratio corresponding to the first bit sequence is different, and therefore, the generated The composite constellation is different, that is, the relationship between the synthesized constellation and the transmission power ratio is one-to-one correspondence in the case where the bit sequence is determined.
  • the first bit sequence corresponds to the fourth transmission power ratio ⁇ 3
  • the paired modulation mode is QPSK and 64QAM
  • the generated composite constellation is the first 256-point composite constellation.
  • the first bit sequence corresponds to the fifth transmission power ratio ⁇ 4
  • the paired modulation mode is 16QAM and 16QAM
  • the generated composite constellation is the second 256-point composite constellation
  • the composite modulation symbol can be expressed as P F S F + P N S N , where P F and P N are weighting factors,
  • the S F is a first bit information b F (0) b F (1)...b F (m) is a complex symbol modulated according to the first modulation mode, and the S F may be Expressed as I F +jQ F , the first modulation mode is QPSK, or one of QPSK and 16QAM.
  • S N is a complex symbol obtained by the second bit information b N (0) b N (1)...b N (n) in the following manner:
  • the second bit information b N (0)b N (1)...b N (n) is performed by the first bit information b F (0)b F (1)...b F (m)
  • the optimization result is modulated according to the second modulation method to obtain a complex symbol S N .
  • the first bit information b F (0)b F (1) is passed.
  • ...b F (m) optimizes the modulation result to obtain the complex symbol S N .
  • the embodiment of the present invention further provides a storage medium, where the storage medium is disposed in a transmitter, and the storage medium is configured to: store program code of the information modulation method provided by any of the embodiments shown in FIG. 4 and FIG.
  • the storage medium is for performing the information modulation method provided by any of the embodiments shown in FIGS. 4 and 5.
  • all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.
  • the device/function module/function unit in the above embodiment is implemented in the form of a software function module and When sold or used as a stand-alone product, it can be stored on a computer readable storage medium.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the transmitter combines at least two sets of bit information to be transmitted into a first bit sequence, and according to a preset modulation mapping table and a transmission power ratio corresponding to the first bit sequence, A bit sequence performs modulation mapping to generate a composite constellation, wherein at least two sets of bit information are bit information transmitted to different receivers, and the modulation mapping table includes a plurality of sets of bit sequences and synthesized modulation symbols corresponding to each set of bit sequences, each synthesized The modulation symbol is used to represent a composite constellation.
  • the embodiment of the present invention implements, by using a preset modulation mapping table, generates a relatively determined composite constellation according to a corresponding transmission power ratio of the first bit sequence of the demodulation mapping;
  • the corresponding relationship between the modulation mode and the transmission power ratio is reasonably designed to solve the problem that the receiver needs to demodulate an indeterminate composite constellation in the related art, which leads to demodulation performance degradation and increased signaling overhead.

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Abstract

La présente information concerne un procédé de modulation et un appareil, le procédé de modulation d'information comprend : un émetteur synthétisant au moins deux ensembles d'information d'élément binaire devant être transmis dans une première séquence d'élément binaire, au moins deux desdits ensembles d'information d'élément binaire étant une information d'élément binaire devant être transmises à différents récepteurs ; conformément à une table de mappage de modulation prédéfinie et à un rapport de puissance de transmission correspondants à la première séquence d'élément binaire, la modulation de l'émetteur et le mappage de la séquence du premier élément binaire, génèrent ainsi une constellation synthétique ; ladite table de mappage de modulation comprend une pluralité d'ensemble de séquences d'élément binaire et un symbole de modulation synthétique correspondants à chacun des ensembles de séquence d'élément binaire, chaque symbole de modulation synthétique étant utilisé afin de représenter une constellation synthétique.
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