WO2017177825A1

WO2017177825A1 - Modulation symbol transmission method and sending device

Info

Publication number: WO2017177825A1
Application number: PCT/CN2017/078638
Authority: WO
Inventors: 郭志恒; 谢信乾; 程型清
Original assignee: 华为技术有限公司
Priority date: 2016-04-12
Filing date: 2017-03-29
Publication date: 2017-10-19
Also published as: CN107294690A; CN107294690B

Abstract

A modulation symbol transmission method and a sending device, which are used for reducing the error probability of a bit sequence to be sent of the sending device obtained by a receiving device by means of modulation symbol detection, and improving the communication performance of a system. The method comprises: a sending device, according to a set modulation mode, modulating a bit sequence to be sent into M modulation symbols, wherein M is an integer greater than 1; and the sending device determining M resource units, mapping the M modulation symbols to the M resource units one to one, and sending same to the receiving device.

Description

Modulation symbol transmission method and transmitting device

The present application claims priority to Chinese Patent Application No. 201610225408.8, entitled "A Modulation Symbol Transmission Method and Transmission Device", filed on April 12, 2016, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present invention relates to the field of wireless communications, and in particular, to a modulation symbol transmission method and a transmitting device.

Background technique

In the existing wireless communication technology, as shown in FIG. 1 , 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. However, 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.

In order to reduce the error probability of the receiving device detecting the bit sequence and improve the reliability of the 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.

In the scheme of communication according to the spread spectrum technology, since the signal transmitted on each resource unit is the product of the same modulation symbol and the real number, 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.

Summary of the invention

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.

In a first aspect, a modulation symbol transmission method provided by an embodiment of the present invention 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.

In this way, 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. Improve system communication performance.

In a possible implementation manner, 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.

In this way, 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.

In a possible implementation, 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;

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.

In this way, 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.

In a possible implementation, the sending device separately modulates each of the M to-modulated bit sequences, and the method for obtaining the M modulation symbols includes:

Transmitting, according to each of the to-be-modulated bit sequence, and the mapping relationship between the bit sequence and the modulation symbol, each of the to-be-modulated bit sequences to obtain one modulation symbol;

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.

In this way, 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.

In a possible implementation manner, 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.

In this way, 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.

In a possible implementation manner, the set modulation mode includes a modulation mode or a modulation order At least two modulation modes of the plurality of modulation modes.

In a second aspect, a modulation symbol transmission method provided by an embodiment of the present invention includes:

Receiving, by the receiving device, the M modulation symbols that are sent by the transmitting device on the M resource units, where the M is an integer greater than 1, and the M modulation symbols are to be sent by the sending device according to the set modulation mode. Modulation is obtained;

And determining, by the receiving device, detection information of the to-be-transmitted bit sequence of the sending device according to the M modulation symbols.

In this way, 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, in turn, 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.

In a possible implementation, 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.

In a third aspect, 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.

In an optional implementation, 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.

In a fourth aspect, 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.

In an optional implementation, 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.

In a fifth aspect, 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.

According to a sixth aspect, 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.

According to a seventh aspect, 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.

According to a ninth aspect, 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.

In the technical solution provided by the embodiment of the present invention, 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. In the present solution, 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, in turn, 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.

DRAWINGS

1 is a schematic diagram of a modulation symbol transmission method provided by the prior art;

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.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope 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. In the present solution, 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, in turn, 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. For example, in the case of the uplink transmission, the transmitting device may be a terminal device, and the receiving device may be a base station. For the downlink transmission, the sending device may be a base station, and 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. Code Division Multiple Access (CDMA) 2000, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Wideband Code Division Multiple Access (WCDMA), time division Duplex - Long Term Evolution (Time Division Duplexing-Long Term Evolution (TDD LTE), Frequency Division Duplexing-Long Term Evolution (FDD LTE), Long Term Evolution-Advanced (LTE-advanced), Personal Handheld Phone System (Personal Handy-phone System, PHS), Wireless Fidelity (WiFi), Worldwide Interoperability for Microwave Access (WiMAX), and various wireless communication systems in the future. .

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 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. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), etc. . 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.

For the GSM system, 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.

A modulation symbol transmission method provided by an embodiment of the present invention is described in detail below.

As shown in FIG. 3, on the sending device side, an embodiment of the present invention provides a modulation symbol transmission method, including:

S301. 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.

S302. 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.

In the embodiment of the present invention, 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 number of bits included. 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. For example, the bit sequence to be transmitted may be {b ₁ . In the form of b ₂ , . . . , b _L }, 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. In the field of wireless communication, transmission resources may be distributed in multiple dimensions such as time domain, frequency domain, and code domain. Taking the LTE system as an example, in the 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. A slot of 0.5 milliseconds, each slot containing 6 or 7 Orthogonal Frequency Division Multiplexing (OFDM) symbols. In the frequency domain, the system divides the available frequency resources into several subcarriers, each of which occupies a bandwidth of 15000 Hz in the frequency domain. In the LTE system, 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.

In the embodiment of the present invention, 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.

Wherein, the 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. When the type of modulation method used is less than or equal to M.

An example of scheme one

Assume that 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 }. In step 1, the bit positions in {b ₁ , b ₂ , b ₃ , b ₄ } are rearranged according to the order of M=2 bit positions, and two bit sequences to be modulated are obtained, which are respectively {b ₃ , b ₁ , b ₄ , b ₂ } and {b ₁ , b ₃ , b ₂ , b ₄ }. In 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 .

Optionally, in step 3, 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.

Optionally, the sending device determines a mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode. Taking the binary bit as an example, if 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 .

Taking the set modulation mode as 16QAM as an example, the modulation order of 16QAM is 4, and the bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } modulated by 16QAM can have 2 ⁴ = 16 possibilities, 16QAM modulated output. The modulation symbols also have 2 ⁴ = 16 forms possible. Exemplarily, the mapping relationship between the bit sequence and the modulation symbol determined according to the modulation mode 16QAM can be as shown in Table 1 below, wherein the relationship between a and b satisfies a ² + b ² =1, for example

Table I

比特序列{b₁，b₂，b₃，b₄}Bit sequence {b ₁ , b ₂ , b ₃ , b ₄ }	比特序列映射的调制符号Bit sequence mapped modulation symbol
00000000	-b+bj-b+bj
00010001	a+bja+bj
00100010	-a+bj-a+bj
00110011	b+bjb+bj
01000100	-b-aj-b-aj
01010101	a-bjA-bj
01100110	-a-bj-a-bj
01110111	b-ajB-aj
10001000	-b+aj-b+aj
10011001	a+aja+aj
10101010	-a+aj-a+aj
10111011	b+ajb+aj
11001100	-b-bj-b-bj
11011101	a-bjA-bj
11101110	-a-bj-a-bj
11111111	b-bjB-bj

In 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 . For example, when {b ₃ , b ₁ , b ₄ , b ₂ } is {0, ₁ , ₁ , 0}, by querying Table 1, the modulation symbol S ₁ of the { ₀ , ₁ , ₁ , 0} mapping is obtained as - Ab*j;

When it is {1, 1, 0, 0}, by querying Table 1, it is found that the modulation symbol S ₂ of the {1, 1, 0, 0} mapping is -bb*j.

If the modulation mode is set to include at least two modulation modes of the plurality of modulation modes with the same modulation order, 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. For example, 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:

Wherein, the 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.

An example of scheme two

Assume that 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 }. In step 1, the bit positions in {b ₁ , b ₂ , b ₃ , b ₄ } are rearranged according to the order of M=2 bit positions, and two bit sequences to be modulated are obtained, which are respectively {b ₃ , b ₁ , b ₄ , b ₂ } and {b ₁ , b ₃ , b ₂ , b ₄ }. In 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 .} .

Optionally, in step 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.

Taking the set modulation mode as 16QAM as an example, the modulation order of 16QAM is 4, and the bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } modulated by 16QAM can have 2 ⁴ = 16 possibilities, 16QAM modulated output. The modulation symbols also have 2 ⁴ = 16 possibilities. Exemplarily, the mapping relationship between the bit sequence and the modulation symbol determined according to the modulation mode 16QAM can be as shown in Table 1, wherein the relationship between a and b satisfies a ² + b ² =1, for example

In 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 . For example, when {b ₃ , b ₁ , b ₄ , b ₂ } is {0, ₁ , ₁ , 0}, by querying Table 1, the modulation symbol S ₁ of the { ₀ , ₁ , ₁ , 0} mapping is obtained as - When ab*j;{b ₁ ,b ₃ ,b ₂ ,b ₄ } is {1,0,0,1}, by querying Table 1, the modulation symbol S ₂ mapped by {1,0,0,1} is obtained. Is a+a*j.

Option 3 includes the following steps:

Transmitting, according to the bit sequence to be sent, and the mapping relationship between the bit sequence and the modulation symbol, mapping the bit sequence to be transmitted to obtain M modulation symbols;

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.

Optionally, the sending device determines a mapping relationship between the bit sequence and the modulation symbol according to the set modulation mode. Taking the binary bit as an example, if 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. Obtaining a 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.

An example of scheme three

Taking the set modulation mode as 16QAM as an example, the modulation order of 16QAM is 4, and the bit sequence {b ₁ , b ₂ , b ₃ , b ₄ } modulated by 16QAM can have 2 ⁴ = 16 possibilities, 16QAM modulated output. The modulation symbols also have 2 ⁴ = 16 possible forms, each of which is mapped to two modulation symbols.

Exemplarily, the mapping relationship between the bit sequence and the modulation symbol determined according to the modulation mode 16QAM may be as shown in Table 2, wherein the relationship between a and b satisfies a ² + b ² =1, for example

Table II

By looking up Table 2, 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 When } is {1, 0, 0, 1}, by looking up Table 2, the modulation symbols S ₁ mapped by { _{1, 0, 0, 1} } are a+a*j, and S ₂ is -bb*j.

After obtaining the M modulation symbols by using the foregoing three schemes, 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. After shown to 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. As shown in FIG. 5, on the receiving device side, the embodiment of the present invention provides a modulation symbol transmission method, including:

S501. 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.

S502. 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. Exemplarily, for the bit b ₁ in the bit sequence to be transmitted, the soft information at the receiving device can be expressed as

Where P(b ₁ =1) indicates the probability that b ₁ is 1 by the receiving device, and P(b ₁ =0) indicates the probability that b ₁ is 0 by the receiving device, and the bit sequence to be transmitted is sent. 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.

It should be noted that the 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.

In the technical solution provided by the embodiment of the present invention, 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. In the present solution, 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, in turn, 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.

In the embodiment of the present invention, 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.

Optionally, 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.

Optionally, 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;

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.

Optionally, 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.

Optionally, when the 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.

Optionally, the set modulation mode includes one modulation mode or at least two modulation modes of multiple modulation modes with the same modulation order.

It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logical function division, and the actual implementation may have another division manner. In addition, 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. Based on such understanding, the technical solution of the present application or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. 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. .

Based on the above embodiment, 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. Referring to FIG. 7, 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. 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. In particular, 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.

Optionally, 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.

Based on the above embodiment, 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. Referring to FIG. 9, 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. In particular, 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.

Based on the above embodiment, an embodiment of the present invention provides a wireless communication system. As shown in FIG. 10, 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.

In summary, 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.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A modulation symbol transmission method, comprising:

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 method according to claim 1, wherein the transmitting device modulates the bit sequence to be transmitted into M modulation symbols according to the set modulation mode, including:

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 method according to claim 2, wherein before the transmitting device separately modulates each of the M to-modulated bit sequences, the method further includes:

The transmitting device selects, from the M to-be-modulated bit sequences, a set number of to-be-modulated bit sequences;

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 method according to claim 2 or 3, wherein the transmitting device respectively modulates each of the M to-modulated bit sequences to obtain the M modulation symbols, including:

Transmitting, according to each of the to-be-modulated bit sequence, and the mapping relationship between the bit sequence and the modulation symbol, each of the to-be-modulated bit sequences to obtain one modulation symbol;

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 method according to claim 1, wherein the transmitting device modulates the bit sequence to be transmitted into M modulation symbols, including:

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 method according to any one of claims 1 to 5, wherein the set modulation mode comprises at least two modulation modes of a modulation mode or a plurality of modulation modes having the same modulation order.
A transmitting device, comprising:

a processing module, 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 the M modulation symbols one-to-one Go to the M resource units;

And a sending module, configured to send the processing module to the receiving device by mapping the M modulation symbols on the M resource units one-to-one.
The transmitting device according to claim 7, wherein the processing module 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 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 processing module separately modulates each of the M to-be-modulated bit sequences according to the set modulation mode to obtain the M modulation symbols.
The transmitting device according to claim 8, wherein before the processing module modulates each of the M to-modulated bit sequences, the processing module is further configured to:

The processing module selects, from the M to-be-modulated bit sequences, a set number of to-be-modulated bit sequences;

For each of the set number of to-be-modulated bit sequences to be modulated, the processing module performs an inversion operation on the bits of the set position in each of the to-be-modulated bit sequences.
The transmitting device according to claim 8 or 9, wherein the processing module respectively modulates each of the M to-modulated bit sequences to obtain the M modulation symbols, Including specifically for:

The processing module respectively maps each of the to-be-modulated bit sequences to obtain one modulation symbol according to each of the to-be-modulated 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 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 according to claim 7, wherein the processing module is configured to: when the bit sequence to be transmitted is modulated into M modulation symbols, specifically:

The processing module 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 according to any one of claims 7 to 11, wherein the set modulation mode comprises at least two modulation modes of a modulation mode or a plurality of modulation modes having the same modulation order.