WO2017177825A1 - Procédé de transmission de symbole de modulation, et dispositif d'envoi - Google Patents

Procédé de transmission de symbole de modulation, et dispositif d'envoi Download PDF

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Publication number
WO2017177825A1
WO2017177825A1 PCT/CN2017/078638 CN2017078638W WO2017177825A1 WO 2017177825 A1 WO2017177825 A1 WO 2017177825A1 CN 2017078638 W CN2017078638 W CN 2017078638W WO 2017177825 A1 WO2017177825 A1 WO 2017177825A1
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Prior art keywords
modulation
bit sequence
modulated
bit
transmitted
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PCT/CN2017/078638
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English (en)
Chinese (zh)
Inventor
郭志恒
谢信乾
程型清
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/0011—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to payload information
    • 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
    • H04L27/36—Modulator circuits; Transmitter circuits

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a modulation symbol transmission method and a transmitting device.
  • a transmitting device usually modulates a bit sequence to be transmitted into one modulation symbol, and maps the modulation symbol to a resource unit for transmission to a receiving device.
  • the modulation symbols transmitted by the transmitting device are susceptible to various factors such as wireless channel path loss, shadow effect, multipath fading, etc., so that the received signal of the modulation symbol received by the receiving device on a single resource unit is relatively low, resulting in a receiving device.
  • the error probability of the bit sequence obtained by modulation symbol detection is high, which seriously affects the reliability of communication.
  • the existing wireless communication system can use the spread spectrum technology to communicate, as shown in FIG. 2, the transmitting device modulates the bit sequence to be transmitted into a modulation symbol, and After the modulation symbols are respectively multiplied by different real numbers, the obtained different products are respectively mapped to a plurality of resource units and transmitted to the receiving device.
  • the transmission performance of the scheme is equivalent to transmitting the same modulation symbol on all resource units.
  • the modulation symbol carries the information of each bit in the bit sequence to be transmitted.
  • the reliability of the information of the different bits carried in the modulation symbol is greatly different, so that the detection performance of the receiving device is affected by the bit information with the lowest reliability. No improvement is made to the reliability difference problem of the bit information carried by the modulation symbols. Therefore, in the scheme of communicating according to the spread spectrum technique, the average error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device by modulation symbol detection is still large.
  • the embodiment of the present invention provides a modulation symbol transmission method and a transmission device, which are used to reduce an error probability of a to-be-transmitted bit sequence of a transmitting device obtained by a receiving device by using modulation symbol detection, thereby improving system communication performance.
  • a modulation symbol transmission method includes:
  • the transmitting device modulates the bit sequence to be transmitted into M modulation symbols according to the set modulation mode, where the M is an integer greater than one;
  • the transmitting device determines M resource units, and maps the M modulation symbols one-to-one to the M resource units, and sends the information to the receiving device.
  • the modulation mode refers to a modulation mode used when modulating a bit sequence based on a modulation technique used, and the modulation mode may modulate a bit sequence to be transmitted into a signal having amplitude and phase, and the signal is represented by a complex number.
  • the complex number is called a modulation symbol.
  • the bit sequence to be transmitted refers to a sequence in which a plurality of bits are arranged in a certain order, and the number of bits to be transmitted in the bit sequence to be transmitted is equal to the modulation order of the set modulation mode.
  • the transmitting device modulates the bit sequence to be transmitted into a plurality of modulation symbols, so that the transmitting device will send
  • the reliability of the bit information carried by the modulation symbol of the receiving device is averaged, and the reliability difference between different bit information carried by the modulation symbol is improved, thereby reducing the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection.
  • the method for the transmitting device to modulate a bit sequence to be transmitted into M modulation symbols according to a set modulation mode includes:
  • the transmitting device rearranges the bit positions in the to-be-transmitted bit sequence according to the order of the M bit positions, to obtain M to-be-modulated bit sequences;
  • the transmitting device respectively modulates each of the M to-modulated bit sequences according to the set modulation mode to obtain the M modulation symbols.
  • the transmitting device reorders the bit sequence to be transmitted to obtain a plurality of bit sequences to be modulated, and then multiple modulated bit sequences are modulated to obtain a plurality of modulation symbols, so that the transmitting device carries the modulation symbols sent to the receiving device.
  • the reliability of the bit information is averaged to improve the reliability difference between different bit information carried by the modulation symbols.
  • the method before the sending device separately modulates each of the M to-modulated bit sequences, the method further includes:
  • the transmitting device selects a set number of to-be-modulated bit sequences from the M to-be-modulated bit sequences; the set number is less than or equal to the M;
  • the transmitting device For each of the set number of to-be-modulated bit sequences to be modulated, the transmitting device performs an inversion operation on the bits of the set position in each of the to-be-modulated bit sequences.
  • the reliability of the bit information carried by the modulation symbols transmitted to the receiving device is further averaged, and the reliability difference between different bit information carried by the modulation symbols is improved.
  • the sending device separately modulates each of the M to-modulated bit sequences, and the method for obtaining the M modulation symbols includes:
  • the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be modulated, and the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the bit sequence includes The number of bits is equal to the modulation order of the set modulation mode.
  • the transmitting device performs modulation of the bit sequence to be modulated to obtain its corresponding modulation symbol by searching the mapping relationship between the bit sequence and the modulation symbol.
  • the method for the transmitting device to modulate a bit sequence to be transmitted into M modulation symbols includes:
  • the transmitting device maps the to-be-transmitted bit sequence to obtain M modulation symbols according to the to-be-transmitted bit sequence and the mapping relationship between the bit sequence and the modulation symbol;
  • the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes the bit sequence to be transmitted, and the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to M modulation symbols, and the bit sequence includes The number of bits is equal to the modulation order of the set modulation mode.
  • the transmitting device performs modulation of the bit sequence to be transmitted to obtain a corresponding plurality of modulation symbols by searching a mapping relationship between the bit sequence and the modulation symbol.
  • the set modulation mode includes a modulation mode or a modulation order At least two modulation modes of the plurality of modulation modes.
  • a modulation symbol transmission method includes:
  • the transmitting device since the transmitting device modulates the bit sequence to be transmitted into a plurality of modulation symbols, the transmitting device averages the reliability of the bit information carried by the modulation symbols transmitted to the receiving device, thereby improving reliability between different bit information carried by the modulation symbols.
  • the difference in the performance reduces the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection, thereby improving system communication performance.
  • the detection information of the to-be-transmitted bit sequence of the transmitting device includes a hard decision result of the bit sequence to be transmitted and/or soft information of the bit sequence to be transmitted.
  • an embodiment of the present invention provides a sending device, where the sending device has a function of implementing a behavior of a sending device in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the sending device includes a processor and a transmitter, the processor is configured to support a sending device to perform a corresponding function in the foregoing method, and the transmitter is configured to send the foregoing Data or message involved in the method;
  • the transmitting device may further include a memory for coupling with the processor, which stores program instructions and data necessary for the transmitting device;
  • the transmitting device may further include a receiver, The receiver is used to receive messages or data.
  • an embodiment of the present invention provides a receiving device, where the receiving device has a function of implementing the behavior of the receiving device in the foregoing method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the receiving device includes a receiver and a processor, where the receiver is configured to receive data or a message involved in the foregoing method; the processor is configured to support the receiving device Performing a corresponding function in the above method; the receiving device may further include a memory for coupling with a processor, which stores program instructions and data necessary for receiving the device; the receiving device may further include a transmitter, The sender is used to send messages or data.
  • an embodiment of the present invention provides a wireless communication system, where the wireless communication system includes the transmitting device and the receiving device according to any one of the first to fourth aspects.
  • the embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in a transmitting device according to any one of the first to fifth aspects, comprising The program designed.
  • the embodiment of the present invention provides a computer storage medium for storing computer software instructions for use in a receiving device according to any one of the first to fifth aspects, comprising The program designed.
  • the eighth aspect of the present invention provides a chip for performing the method performed by the transmitting device according to any one of the first to fifth aspects.
  • an embodiment of the present invention provides a chip for performing any one of the foregoing first to fifth aspects. The method performed by the receiving device of the aspect.
  • the transmitting device modulates the to-be-transmitted bit sequence into a plurality of modulation symbols, and transmits the multiple modulation symbols to the receiving device by using multiple resource units.
  • the transmitting device modulates the reliability of the bit information carried by the transmitted modulation symbol by modulating the bit sequence to be transmitted into a plurality of modulation symbols, thereby improving reliability between different bit information carried by the modulation symbol.
  • the difference reduces the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection, thereby improving system communication performance.
  • FIG. 1 is a schematic diagram of a modulation symbol transmission method provided by the prior art
  • FIG. 2 is a schematic diagram of a modulation symbol transmission method provided by the prior art
  • FIG. 3 is a schematic flowchart of a modulation symbol transmission method according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of mapping a modulation symbol and a resource unit according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a modulation symbol transmission method according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a sending device according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a sending device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a receiving device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a receiving device according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a wireless communication system according to an embodiment of the present invention.
  • the embodiment of the invention provides a modulation symbol transmission method and a transmission device.
  • the transmitting device modulates a to-be-transmitted bit sequence into a plurality of modulation symbols, and transmits the plurality of modulation symbols to the receiving device through multiple resource units.
  • the transmitting device modulates the reliability of the bit information carried by the transmitted modulation symbol by modulating the bit sequence to be transmitted into a plurality of modulation symbols, thereby improving reliability between different bit information carried by the modulation symbol.
  • the difference reduces the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection, thereby improving system communication performance.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • the technical solution provided by the embodiment of the present invention can be applied to a wireless communication system, and is applicable to a scenario in which a sending device sends information to a receiving device.
  • the transmitting device may be a terminal device
  • the receiving device may be a base station.
  • the sending device may be a base station
  • the receiving device may be a terminal device.
  • the communication system of the wireless communication system to which the embodiment of the present invention is applied includes but is not limited to: Global System of Mobile communication (GSM), Code Division Multiple Access (CDMA) IS-95, and code.
  • the terminal device may be a wireless terminal, which may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device that is connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a radio access network (eg, RAN, Radio Access Network), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and with a mobile terminal
  • RAN Radio Access Network
  • the computers for example, can be portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile devices that exchange language and/or data with the wireless access network.
  • a wireless terminal may also be called a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, an Access Point, and a Remote Terminal.
  • Remote Terminal Access Terminal, User Terminal, User Agent, User Device, or User Equipment.
  • the base station may include a Base Transceiver Station (BTS) and/or a Base Station Controller (BSC); for the TD-SCDMA system, the WCDMA system, the base station may include a Node B (NodeB, NB) And/or a Radio Network Controller (RNC), for an LTE system, the base station may be an eNB.
  • BTS Base Transceiver Station
  • BSC Base Station Controller
  • NodeB Node B
  • RNC Radio Network Controller
  • a modulation symbol transmission method provided by an embodiment of the present invention is described in detail below.
  • an embodiment of the present invention provides a modulation symbol transmission method, including:
  • the transmitting device modulates the bit sequence to be transmitted into M modulation symbols according to the set modulation mode, where M is an integer greater than 1.
  • the sending device determines M resource units, and maps the M modulation symbols one-to-one to the M resource units, and sends the information to the receiving device.
  • the set modulation mode may include at least two modulation modes of a modulation mode or a plurality of modulation modes with the same modulation order, and the modulation order of the modulation mode is equal to the bit sequence modulated by the modulation mode.
  • the modulation method refers to a modulation method used when modulating a bit sequence based on a modulation technique employed, that is, a method of mapping a bit sequence to a modulation symbol, for example, a modulation technique of 16 Quadrature Amplitude Modulation (Quadrature Amplitude Modulation, QAM) or 64QAM, etc.
  • the bit sequence to be transmitted refers to a sequence in which a plurality of bits are arranged in a certain order.
  • the number of bits to be transmitted in the bit sequence to be transmitted is equal to the modulation order of the set modulation mode.
  • the bit sequence to be transmitted may be ⁇ b 1 .
  • L represents the length of the bit sequence to be transmitted, ie the number of bits contained in the bit sequence to be transmitted, and L is equal to the modulation order of the set modulation mode employed by the transmitting device, Taking the debugging mode of 16QAM as an example, the modulation order of the 16QAM debugging mode is 4, and the number of bits to be transmitted in the bit sequence to be transmitted is 4.
  • the bit sequence to be transmitted can be modulated into a signal having amplitude and phase by means of modulation, the signal being represented by a complex number called a modulation symbol.
  • the resource unit in the embodiment of the present invention may be a time-frequency resource unit, but with the development of the technology, the embodiment of the present invention
  • the resource unit in the medium is not limited to the time-frequency resource unit.
  • transmission resources may be distributed in multiple dimensions such as time domain, frequency domain, and code domain.
  • time domain the largest time unit is a radio frame with a length of 10 milliseconds.
  • the radio frame can be divided into 10 subframes with a length of 1 millisecond, and each subframe can be divided into two lengths.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the system divides the available frequency resources into several subcarriers, each of which occupies a bandwidth of 15000 Hz in the frequency domain.
  • the smallest unit of resources consists of the time occupied by 1 OFDM symbol in the time domain and the bandwidth occupied by 1 subcarrier in the frequency domain, which is called a time-frequency resource unit.
  • S301 can be implemented by the following three schemes.
  • Option 1 includes the following steps:
  • Step 1 The transmitting device rearranges the bit positions in the bit sequence to be transmitted according to the order of M bit positions, and obtains M bit sequences to be modulated.
  • bit position arrangement order may be set or random.
  • Step 2 The transmitting device selects a set number of to-be-modulated bit sequences from the M to-be-modulated bit sequences. For each set of to-be-modulated bit sequences in the set number of transmitting bit sequences, the transmitting device pairs each to be modulated. The bits of the set position in the bit sequence are inverted.
  • the number of bits to be inverted may be the same or different, and the bit positions of the inversion operations may be the same or different.
  • Step 3 The transmitting device modulates each of the M to-modulated bit sequences according to the set modulation mode to obtain M modulation symbols.
  • the modulation mode for modulating the M to be modulated bit sequences may be at least two modulation modes of a modulation mode or a plurality of modulation modes with the same modulation order, and adopting at least two modulation modes of the multiple modulation modes.
  • the type of modulation method used is less than or equal to M.
  • the modulation mode is 16QAM
  • the modulation order of 16QAM is 4, and the bit sequence to be transmitted is ⁇ b 1 , b 2 , b 3 , b 4 ⁇ .
  • step 2 the second bit b 3 and the fourth bit b 4 of the second bit sequence to be modulated ⁇ b 1 , b 3 , b 2 , b 4 ⁇ are selected to be inverted to obtain a bit to be modulated.
  • sequence In step 3 16QAM is used to treat the modulated bit sequence ⁇ b 3 , b 1 , b 4 , b 2 ⁇ and Modulation is performed to obtain two modulation symbols S 1 and S 2 .
  • the sending device may map each bit sequence to be modulated to obtain a modulation symbol by searching a mapping relationship between the bit sequence and the modulation symbol, that is, obtaining a one-to-one mapping with the M to-modulated bit sequences.
  • Modulation symbols The bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes a bit sequence to be modulated, and the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the bit sequence includes a number of bits equal to that used by the transmitting device.
  • the modulation order of the set modulation mode is mapped to one modulation symbol.
  • the sending device determines a mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode.
  • the modulation order of the set modulation mode is L, that is, the bit sequence modulated by the set modulation mode includes L bits
  • the bit sequence modulated by the set modulation mode exists 2 It is possible that there are 2 L possibilities for modulating the output modulation symbols by the set modulation mode, and the mapping relationship between the bit sequence and the modulation symbols is obtained according to the set modulation mode, wherein one bit sequence corresponds to one modulation symbol in the mapping relationship .
  • Bit sequence ⁇ b 1 , b 2 , b 3 , b 4 Bit sequence mapped modulation symbol 0000 -b+b*j 0001 a+b*j 0010 -a+b*j 0011 b+b*j 0100 -b-a*j 0101 A-b*j 0110 -a-b*j 0111 B-a*j 1000 -b+a*j 1001 a+a*j 1010 -a+a*j 1011 b+a*j 1100 -b-b*j 1101 A-b*j 1110 -a-b*j 1111 B-b*j
  • step 3 by querying Table 1 , the modulation symbol S 1 mapped to the bit sequence ⁇ b 3 , b 1 , b 4 , b 2 ⁇ to be modulated, and the bit sequence to be modulated are obtained.
  • the mapped modulation symbol S 2 by querying Table 1 , the modulation symbol S 1 mapped to the bit sequence ⁇ b 3 , b 1 , b 4 , b 2 ⁇ to be modulated, and the bit sequence to be modulated are obtained.
  • the mapped modulation symbol S 2 by querying Table 1 , the modulation symbol S 1 mapped to the bit sequence ⁇ b 3 , b 1 , b 4 , b 2 ⁇ to be modulated, and the bit sequence to be modulated are obtained.
  • the mapped modulation symbol S 2 by querying Table 1 , the modulation symbol S 1 mapped to the bit sequence ⁇ b 3 , b 1 , b 4 , b 2 ⁇ to be modulated, and the bit sequence to be modulated are
  • the modulation symbol S 1 of the ⁇ 0 , 1 , 1 , 0 ⁇ mapping is obtained as - Ab*j;
  • the modulation symbol S 2 of the ⁇ 1, 1, 0, 0 ⁇ mapping is -bb*j.
  • the mapping relationship between the bit sequence and the modulation symbol is determined according to each modulation mode, and the bit sequence determined according to a modulation mode is In the mapping relationship of modulation symbols, a bit sequence is mapped to a modulation symbol.
  • a modulation method can determine a mapping relationship list similar to that shown in Table 1. Demodulating the M to be modulated bit sequence according to the determined mapping relationship between the bit sequence and the modulation symbol, determining a modulation mode to be used for a bit sequence to be modulated, and determining the to-be-selected mapping list corresponding to the modulation mode The modulation symbols of the modulated bit sequence mapping.
  • Option 2 includes the following steps:
  • Step 1 The transmitting device rearranges the bit positions in the bit sequence to be transmitted according to the order of M bit positions, and obtains M bit sequences to be modulated.
  • bit position arrangement order may be set or random.
  • Step 2 The transmitting device modulates each of the M to-modulated bit sequences according to the set modulation mode to obtain M modulation symbols.
  • the modulation mode for modulating the M to be modulated bit sequences may be at least two modulation modes of a modulation mode or a plurality of modulation modes with the same modulation order, and adopting at least two modulation modes of the multiple modulation modes.
  • the type of modulation method used is less than or equal to M.
  • the modulation mode is 16QAM
  • the modulation order of 16QAM is 4, and the bit sequence to be transmitted is ⁇ b 1 , b 2 , b 3 , b 4 ⁇ .
  • step 2 the modulation bit sequence ⁇ b 3 , b 1 , b 4 , b 2 ⁇ and ⁇ b 1 , b 3 , b 2 , b 4 ⁇ are respectively modulated by 16QAM to obtain two modulation symbols S 1 and S 2 . .
  • the sending device may map each bit sequence to be modulated to obtain a modulation symbol by searching a mapping relationship between the bit sequence and the modulation symbol, that is, obtaining a one-to-one mapping with the M to-modulated bit sequences.
  • Modulation symbols The bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes a bit sequence to be modulated, and the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the bit sequence includes a number of bits equal to that used by the transmitting device.
  • the modulation order of the set modulation mode is mapped to one modulation symbol.
  • the sending device determines a mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode.
  • the modulation order of the set modulation mode is L, that is, the bit sequence modulated by the set modulation mode includes L bits
  • the bit sequence modulated by the set modulation mode exists 2 It is possible that there are 2 L possibilities for modulating the output modulation symbols by the set modulation mode, and the mapping relationship between the bit sequence and the modulation symbols is obtained according to the set modulation mode, wherein one bit sequence corresponds to one modulation symbol in the mapping relationship .
  • step 2 by querying Table 1 , the modulation symbol S 1 mapped to the bit sequence ⁇ b 3 , b 1 , b 4 , b 2 ⁇ to be modulated, and the bit sequence to be modulated ⁇ b 1 , b 3 , b 2 , b 4 ⁇ mapped modulation symbol S 2 .
  • the mapping relationship between the bit sequence and the modulation symbol is determined according to each modulation mode, and the bit sequence determined according to a modulation mode is In the mapping relationship of modulation symbols, a bit sequence is mapped to a modulation symbol.
  • a modulation method can determine a mapping relationship list similar to that shown in Table 1. Demodulating the M to be modulated bit sequence according to the determined mapping relationship between the bit sequence and the modulation symbol, determining a modulation mode to be used for a bit sequence to be modulated, and determining the to-be-selected mapping list corresponding to the modulation mode The modulation symbols of the modulated bit sequence mapping.
  • Option 3 includes the following steps:
  • the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes a bit sequence to be transmitted, and the bit sequence
  • the mapping relationship with the modulation symbols is that one bit sequence is mapped to M modulation symbols, and the bit sequence contains a number of bits equal to the modulation order of the set modulation mode.
  • the sending device determines a mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode.
  • the modulation order of the set modulation mode is L, that is, the bit sequence modulated by the set modulation mode includes L bits, the bit sequence modulated by the set modulation mode exists 2 It is possible that there are 2 L possibilities for modulating the output modulation symbols by the set modulation mode.
  • mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode, wherein the mapping relationship includes 2 L bit sequences, and for any one of the bit sequences, selecting M modulation symbols from the 2 L modulation symbols as the Any one bit sequence mapped modulation symbol, wherein the selection mode of selecting M modulation symbols may be either set or random. Therefore, in the mapping relationship between the bit sequence and the modulation symbol obtained according to the set modulation method, any one bit sequence corresponds to M modulation symbols.
  • two modulation symbols S 1 and S 2 mapped to the bit sequence ⁇ b 1 , b 2 , b 3 , b 4 ⁇ to be transmitted can be determined, for example, ⁇ b 1 , b 2 , b 3 , b 4
  • ⁇ is ⁇ 1
  • the modulation symbols S 1 mapped by ⁇ 1, 0, 0, 1 ⁇ are a+a*j
  • S 2 is -bb*j.
  • the sending device may map the obtained M modulation symbols to the M resource units one-to-one and send them to the receiving device.
  • M 2
  • time-frequency resource unit resource unit as an example, transmitting apparatus 2 to obtain modulation symbols S 1 and S 2 are shown in Figure 4, the modulation symbols S 1 and S 2 are mapped to 2-one
  • the resource unit is sent to the receiving device.
  • the transmitting device sends the modulation symbol to the receiving device by using the foregoing method.
  • the embodiment of the present invention provides a modulation symbol transmission method, including:
  • the receiving device receives, by the sending device, M modulation symbols that are sent on the M resource units, where M is an integer greater than 1, and M modulation symbols are modulated by the transmitting device to obtain a bit sequence to be transmitted.
  • the receiving device determines, according to the M modulation symbols, detection information of the to-be-transmitted bit sequence of the transmitting device.
  • the detection information of the bit sequence to be transmitted includes a hard decision result of the bit sequence to be transmitted and/or soft information of the bit sequence to be transmitted.
  • the hard decision result refers to the bit sequence obtained by the receiving device decision; the soft information can have several representation methods.
  • Soft information can be expressed as
  • the receiving device may determine the detection information of the to-be-transmitted bit sequence of the transmitting device according to the M modulation symbols by using a joint detection method.
  • the detecting method may include: the receiving device receives M modulation symbols on the M resource units, performs symbol combining on the received M modulation symbols, and the receiving device demodulates the combined symbols to obtain a bit sequence to be transmitted. Hard decision result.
  • the method for checking the detection may also include: the receiving device separately performs soft demodulation on the modulation symbols transmitted on each resource unit, obtains soft information corresponding to different bits in the bit sequence to be transmitted, and combines the soft information corresponding to the same bit, Finally, the soft information corresponding to the different bits after the combination is used to recover the bit sequence to be transmitted.
  • the method of merging is, for example, maximum ratio combining, which is a method of receiving diversity combining, which means that the combined signal is equal to the weighted sum of the signals received on the respective resource units.
  • modulation symbol transmission method on the receiving device side and the modulation symbol transmission method on the transmitting device side are based on the same idea, and the modulation symbol transmission method on the receiving device side can be combined with the prior art. Means to achieve.
  • the transmitting device modulates the to-be-transmitted bit sequence into multiple modulation symbols, and sends the multiple modulation symbols to the receiving device by using multiple resource units.
  • the transmitting device modulates the reliability of the bit information carried by the transmitted modulation symbol by modulating the bit sequence to be transmitted into a plurality of modulation symbols, thereby improving reliability between different bit information carried by the modulation symbol.
  • the difference reduces the error probability of the to-be-transmitted bit sequence of the transmitting device obtained by the receiving device through modulation symbol detection, thereby improving system communication performance.
  • the wireless communication system adopts a spread spectrum technology, and after the transmitting device modulates the bit sequence to be transmitted into a plurality of modulation symbols, the plurality of modulation symbols are transmitted to the receiving device by using the same number of resource units as the modulation symbols.
  • the probability that a resource unit experiences severe radio channel multipath fading and interference at the same time is much less than the probability that a single resource unit experiences severe fading and interference, thereby reducing the risk of modulated signal transmission.
  • the receiving device may adopt a joint detection method to improve the signal to interference and noise ratio of the received modulation symbols. Therefore, the spread spectrum technology in the embodiment of the present invention can reduce the error probability of the bit detection by the receiving device, so as to improve the reliability of the communication.
  • FIG. 6 is a schematic diagram of a sending device according to an embodiment of the present disclosure.
  • the sending device 600 includes a processing module 601 and a sending module 602. among them,
  • the processing module 601 is configured to modulate a bit sequence to be transmitted into M modulation symbols according to a set modulation mode, where M is an integer greater than 1; determine M resource units, and map M modulation symbols one to one to M On the resource unit;
  • the sending module 602 is configured to send the processing module 601 one-to-one to the M modulation symbols on the M resource units and send the M modulation symbols to the receiving device.
  • the processing module 601 is configured to: when the bit sequence to be transmitted is modulated into M modulation symbols according to the set modulation mode, specifically:
  • the processing module 601 rearranges the bit positions in the bit sequence to be transmitted according to the order of the M bit positions, to obtain M to be modulated bit sequences;
  • the processing module 601 separately modulates each of the M to-modulated bit sequences according to the set modulation mode to obtain M modulation symbols.
  • the processing module 601 before the processing module 601 separately modulates each of the M to-modulated bit sequences, the processing module 601 is further configured to:
  • the processing module 601 selects a set number of to-be-modulated bit sequences from the M to-be-modulated bit sequences;
  • the processing module 601 For each of the set of to-be-modulated bit sequences to be modulated, the processing module 601 performs an inversion operation on the bits of the set position in each bit sequence to be modulated.
  • the processing module 601 separately modulates each of the M to-modulated bit sequences to obtain M modulation symbols, and specifically includes:
  • the processing module 601 respectively maps each to-be-modulated bit sequence to obtain one modulation symbol according to each bit sequence to be modulated and a mapping relationship between the bit sequence and the modulation symbol;
  • the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes a bit sequence to be modulated, and the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to one modulation symbol, and the bit sequence includes a number of bits equal to a set modulation mode. Modulation order.
  • processing module 601 modulates the bit sequence to be transmitted into M modulation symbols, specifically:
  • the processing module 601 maps the to-be-transmitted bit sequence to obtain M modulation symbols according to the to-be-transmitted bit sequence and the mapping relationship between the bit sequence and the modulation symbol;
  • the bit sequence in the mapping relationship between the bit sequence and the modulation symbol includes a bit sequence to be transmitted, and the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to M modulation symbols, and the bit sequence includes a number of bits equal to the set modulation.
  • the modulation order of the mode includes a bit sequence to be transmitted, and the mapping relationship between the bit sequence and the modulation symbol is that one bit sequence is mapped to M modulation symbols, and the bit sequence includes a number of bits equal to the set modulation.
  • the set modulation mode includes one modulation mode or at least two modulation modes of multiple modulation modes with the same modulation order.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • An integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium.
  • the computer software product is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all of the methods of various embodiments of the present application or Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .
  • the embodiment of the present invention further provides a sending device, which may adopt the method provided by the embodiment corresponding to FIG. 3, and may be the same device as the sending device shown in FIG. 6.
  • the transmitting device 700 includes a processor 701, a transmitter 702, a bus 703, and a memory 704, where:
  • the processor 701, the transmitter 702, and the memory 704 are mutually connected by a bus 703.
  • the bus 703 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus or the like.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.
  • the processor 701 in FIG. 7 corresponds to the processing module 601 in FIG. 6, and the transmitter 702 in FIG. 7 corresponds to the sending module 602 in FIG.
  • the transmitting device 700 also includes a memory 704 for storing programs and the like.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 704 may include a random access memory (RAM), and may also include a non-volatile memory such as at least one disk storage.
  • the processor 701 executes an application stored in the memory 704 to implement the modulation symbol transmission method as described above.
  • FIG. 8 is a receiving device according to an embodiment of the present invention, and the receiving device may adopt the method provided by the embodiment corresponding to FIG. 5.
  • the receiving device 800 includes a receiving module 801 and a processing module 802. among them,
  • the receiving module 801 is configured to receive, by the sending device, the M modulation symbols that are sent on the M resource units, where M is an integer greater than 1, and the M modulation symbols are modulated by the sending device according to the set modulation mode. ;
  • the processing module 802 determines, according to the M modulation symbols received by the receiving module 801, detection information of the to-be-transmitted bit sequence of the transmitting device.
  • the detection information of the to-be-transmitted bit sequence of the transmitting device includes a hard decision result of the bit sequence to be transmitted and/or soft information of the bit sequence to be transmitted.
  • the embodiment of the present invention further provides a receiving device, which may adopt the method provided by the embodiment corresponding to FIG. 5, and may be the same device as the receiving device shown in FIG. 8.
  • the receiving device 900 includes a receiver 901, a processor 902, a bus 903, and a memory 904, where:
  • the receiver 901, the processor 902, and the memory 904 are connected to each other by a bus 903; for convenience of representation, only one thick line is shown in FIG. 9, but it does not mean that there is only one bus or one type of bus.
  • the receiver 901 in FIG. 9 corresponds to the receiving module 801 in FIG. 8, and the processor 902 in FIG. 9 corresponds to the processing module 802 in FIG.
  • the receiving device 900 also includes a memory 904 for storing programs and the like.
  • the program can include program code, the program code including computer operating instructions.
  • the processor 902 executes the application stored in the memory 904 to implement the modulation symbol transmission method as described above.
  • an embodiment of the present invention provides a wireless communication system.
  • the wireless communication system 1000 includes a sending device 1001 and a receiving device 1002, where the sending device 1001 is used to implement the sending device in the foregoing embodiment.
  • the implemented device 1002 is configured to implement the functions implemented by the receiving device in the above embodiments.
  • an embodiment of the present application provides a modulation symbol transmission method, a transmitting device, and a receiving device, which are used to reduce an error probability of a to-be-transmitted bit sequence of a transmitting device obtained by a receiving device by using modulation symbol detection, thereby improving system communication performance.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

L'invention concerne un procédé de transmission de symbole de modulation, et un dispositif d'envoi. L'invention vise à réduire la probabilité d'erreur d'une séquence de bits devant être envoyée du dispositif d'envoi, obtenue par un dispositif de réception au moyen d'une détection de symbole de modulation. L'invention vise également à améliorer la performance de communication d'un système. Le procédé comprend les étapes suivantes : un dispositif d'envoi module une séquence de bits à envoyer en M symboles de modulation, selon un mode de modulation défini, M étant un entier supérieur à 1 ; et le dispositif d'envoi détermine M unités de ressource, mappe les M symboles de modulation individuellement sur les M unités de ressource, et les envoie au dispositif de réception.
PCT/CN2017/078638 2016-04-12 2017-03-29 Procédé de transmission de symbole de modulation, et dispositif d'envoi WO2017177825A1 (fr)

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CN201610225408.8A CN107294690B (zh) 2016-04-12 2016-04-12 一种调制符号传输方法及发送设备

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CN102857328A (zh) * 2007-10-10 2013-01-02 三星电子株式会社 在无线通信系统中的异步混合自动重复请求过程指示
CN101714962A (zh) * 2008-10-07 2010-05-26 富士通株式会社 分层调制方法、分层解调方法、发射机及接收机
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