CN102752252B - A kind of single antenna data transmission method for uplink and device - Google Patents

Abstract

The invention discloses a single-antenna transmission method and device, which are used in a wireless communication system. Using the existing single-antenna data transmission method makes the terminal need to perform blind detection on the number of antennas, or cannot use diversity technology to improve system robustness. question. The present invention transmits symbols A+B and C+D on two continuous available resources R _k and R _k+1 in the time domain or frequency domain, wherein symbols A, B, C, and D are from the data symbol S to be transmitted The set of data symbols corresponding to _i {±S _i , ±S _i+1 , }, and the four symbols A, B, C, and D satisfy the condition A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* + D · C ^* = 0. Using the single-antenna transmission method provided by the present invention, the terminal can use the same receiving algorithm as the two-antenna Alamouti coding transmission diversity scheme, thereby avoiding blind detection of the number of antennas, reducing the implementation complexity of the terminal, and improving system access speed.

Description

A single-antenna data transmission method and device

technical field

The invention relates to the field of wireless communication, in particular to a single-antenna data sending method and device.

Background technique

When the terminal accesses the wireless communication system, it first detects the downlink synchronization channel, and completes signal detection, time synchronization and frequency offset correction. Then detect the broadcast channel (BCH, Broadcast CHannel), and obtain system information, including configuration information such as the identity of the base station or access point (AP, Access Point), the number of antennas used, and the like. Finally, the terminal completes the uplink time synchronization through the uplink synchronization channel, and completes the whole process of accessing the system.

As can be seen from the above access process, the terminal does not know the number of antennas used by the AP until it successfully receives the broadcast channel. Therefore, the terminal generally adopts the following two methods to receive the broadcast channel:

Method 1: The terminal performs blind detection on the number of antennas used by the AP, that is, tries various possible AP antenna configurations. The advantage of this method is that when the number of antennas is greater than one, diversity technology can be used to improve the robustness of signal reception. The disadvantage is that it will increase the complexity of terminal detection and reduce the speed of terminal access to the system.

Method 2: Regardless of the antenna configuration of the AP, always use one antenna to send signals. The benefit of this approach is that it reduces the complexity of blind detection. The disadvantage is that even if the number of AP antennas is greater than 1, the multi-antenna diversity technology cannot be used to improve system robustness.

The reason why method 1 needs to perform blind detection on the number of antennas is that the AP does not use diversity technology when it uses one transmit antenna, but it uses diversity technology when it uses multiple transmit antennas. Therefore, the terminal needs to use different receiving methods. For example, when the AP uses 2 transmit antennas, the diversity scheme based on Alamouti coding is usually used. When the number of transmit antennas of the AP is greater than 2, a certain antenna virtualization technology can be used to virtualize multiple transmit antennas into 2 antennas. Alamouti coded.

It should be noted that in addition to the broadcast channel, other data transmissions may also encounter similar problems to the above broadcast channel. Therefore, if a method can be found so that when the number of AP antennas is 1, the terminal can still use the same receiving algorithm as when the AP uses multiple transmit antennas, then the terminal does not need to perform blind detection on the number of AP antennas, thus The complexity of data reception is reduced, and at the same time, when the AP uses multiple antennas, the diversity technology can be used to improve the performance of data reception.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a single-antenna data transmission method and device, which are used in wireless communication systems. Using the existing single-antenna data transmission method makes the terminal need to perform blind detection on the number of antennas, or cannot use diversity. Technical issues that improve the robustness of the system.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

The present invention proposes a new single-antenna data transmission method, which mainly includes:

Configure the mapping mode of the data symbols to be sent S ₀ , S ₁ ,...,S _N-1 on the available resources R ₀ , R ₁ ,...,R _N-1 , where N is the total number of transmissions of the data symbols to be sent The number of subcarriers;

Send A+B and C+D on R _k and R _k+1 respectively, where A, B, C, and D belong to the data symbol set 0≤i≤N-2, 0≤k≤N-2, and A, B, C, D satisfy the conditions:

A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* +D·C ^* ＝0

Among them, the superscript * represents taking the conjugate.

Further, the N is the product of the number M of OFDM symbols for transmitting the data symbols to be sent and the number P of subcarriers in the OFDM symbols that can be used to transmit the data symbols to be sent.

Based on a specific embodiment of the present invention, the R _k and R _k+1 are two adjacent frequency domain resources used to transmit the data symbols to be sent; preferably, the mapping method is specifically:

The data symbols to be sent are mapped in R _k and R _k+1 in a frequency domain continuous manner, and the resource index corresponding to R _k is k=m*P+p, where m is where the resource R _k is located and is used to transmit the The OFDM symbol index of the data symbol to be sent, p is the subcarrier index on the OFDM symbol where R _k is used to transmit the data symbol to be sent.

Based on a specific embodiment of the present invention, the R _k and R _k+1 are two adjacent time domain resources used to transmit the to-be-sent data symbols. Preferably, the mapping method is specifically:

The data symbols to be sent are mapped in the available resources R _k and R _k+1 in a time-domain continuous manner, the resource index _k corresponding to R k=p*M+m, and p is where R _k is used to transmit the The subcarrier index on the OFDM symbol of the data symbol to be sent, m is the OFDM symbol index where the resource R _k is used to transmit the data symbol to be sent.

Further, the data symbol S _i in the data symbol set is the same as the subscript of the available resource R _k , that is, k is equal to i.

Further, the method is applied to a broadcast channel, and the available resources are resources of the broadcast channel used to transmit the data symbols to be sent.

Based on the embodiment of the present invention, the present invention also proposes a single-antenna transmitting device, which includes:

The mapping mode configuration unit is used to configure the mapping mode of the data symbols S ₀ , S ₁ ,..., _SN-1 to be sent on the available resources R ₀ , R ₁ ,...,R _N-1 , where N is the transmission described The total number of subcarriers of data symbols to be sent;

Data symbol selection unit for selecting from data symbol collection Select 4 symbols A, B, C, and D in , where 0≤i≤N-2, and the A, B, C, and D satisfy the conditions:

A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* +D·C ^* ＝0

The superscript * represents the conjugate;

A data symbol sending unit, configured to send A+B and C+D on available resources R _k and R _k+1 respectively, where 0≤k≤N-2.

Further, the N is the product of the number M of OFDM symbols for transmitting the data symbols to be sent and the number P of subcarriers in the OFDM symbols that can be used to transmit the data symbols to be sent.

Further, the mapping mode configured by the mapping mode configuration unit is specifically:

The data symbols to be sent are mapped to R _k and R _k+1 in a continuous frequency domain manner, and R _k and R _k+1 are two adjacent frequency domain resources used to transmit the data symbols to be sent.

Further, the mapping mode configured by the mapping mode configuration unit is specifically:

Map the data symbols to be sent in the available resources R _k and R _k+1 in a continuous time domain manner, and the R _k and R _k+1 are two adjacent times used to transmit the data symbols to be sent Domain resources.

Further, the available resource is a resource of a broadcast channel used to transmit the data symbol to be sent.

Using the single-antenna transmission method provided by the present invention, the terminal can use the same receiving algorithm as the two-antenna Alamouti coding transmission diversity scheme, thereby avoiding blind detection of the number of antennas, reducing the implementation complexity of the terminal, and improving system access. input speed.

Description of drawings

FIG. 1 is a schematic diagram of time and frequency positions of data symbols to be transmitted in Embodiment 1 of the single-antenna data transmission method provided by the present invention, and two adjacent resources are adjacent frequency domain resources;

FIG. 2 is a schematic flow chart of the steps of the single-antenna data transmission method provided by the present invention;

3 is a schematic diagram of time and frequency positions of data symbols to be transmitted in Embodiment 2 of the single-antenna data transmission method provided by the present invention, and the two adjacent resources are adjacent time domain resources;

FIG. 4 is a schematic diagram of time and frequency positions of data symbols to be transmitted in Embodiment 7 of the single-antenna data transmission method provided by the present invention, and the two adjacent resources are adjacent time domain resources;

5 is a schematic diagram of time and frequency positions of data symbols to be transmitted in Embodiment 8 of the single-antenna data transmission method provided by the present invention;

FIG. 6 is a schematic diagram of time and frequency positions of data symbols to be transmitted according to Embodiment 9 of the single-antenna data transmission method provided by the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

Example 1

Figure 1 is a schematic diagram of the mapping between data symbols to be transmitted and available resources in Embodiment 1 of the single-antenna data transmission method provided by the present invention, and Figure 2 is a schematic flowchart of the steps of the single-antenna data transmission method provided by the present invention, and the method flow can be used for For the broadcast channel and other data transmission channels, assuming that the data symbols to be sent are: S ₀ , S ₁ ,...S _N-1 , then the single-antenna data sending method provided by this embodiment is specifically:

Step 301, configure the mapping mode of the data symbols to be sent S ₀ , S ₁ ,..., _SN-1 on the available resources R ₀ , R ₁ ,...,R _N-1 , where N is the transmission of the data symbols to be sent The total number of subcarriers;

Assuming that the number of OFDM symbols used to transmit data symbols to be sent is M, and each OFDM symbol has P available subcarriers used to transmit data symbols to be sent, the available resources are R ₀ , R ₁ ,...,R _N-1 , Wherein N=M*P, in this embodiment, the data symbols to be transmitted are mapped in two consecutive resources R _k and R _k+1 in a continuous frequency domain manner, and the available resource index _k corresponding to R k=m*P +p, where m is the OFDM symbol index where the available resource R _k is used to transmit the data symbol to be sent, and p is the subcarrier index on the OFDM symbol where R _k is used to transmit the data symbol to be sent. R _k and R _k+1 are two adjacent frequency domain resources.

Step 302, from the collection of data symbols Select four symbols A, B, C, D in , and the four symbols meet the conditions:

A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* +D·C ^* ＝0

Among them, where S _i belongs to the set of data symbols to be sent, 0≤i≤N-2, * means to take the conjugate;

Preferably, k is equal to i, that is, the subscripts of the available resources are the same as the subscripts of the data symbols to be sent.

Preferably, the R _k and R _k+1 are two adjacent subcarrier resources in the same OFDM symbol used to transmit data symbols to be sent.

Step 303, sending A+B and C+D on available resources R _k and R _k+1 respectively;

In this embodiment, A+B and C+D are respectively sent on two resources R _k and resource R _k+1 on a certain OFDM symbol, and the four symbols selected in this embodiment are respectively A=S _k , B=S _k+1 , That is, the data symbol sent on resource R _k is S _k +S _k+1 , and the data symbol sent on resource R _k+1 is

Example 2

Fig. 3 is a schematic diagram of mapping between data symbols to be transmitted and available resources in Embodiment 2 of the single-antenna data transmission method provided by the present invention, assuming that the data symbols to be transmitted are: S ₀ , S ₁ ,..., S _N-1 , then The single-antenna data transmission method provided in this embodiment is specifically:

Step 401. In this embodiment, it is determined to map the data symbols to be sent in the available resources R _k and R _k+1 in a continuous time domain manner;

Suppose the number of OFDM symbols used to transmit data symbols to be sent is M, and each OFDM symbol has P available subcarriers used to transmit data symbols to be sent. Then the available resources are R ₀ , R ₁ ,...,R _N-1 , where N=M*P, in this embodiment, two consecutive resources R _k and R _k+1 are mapped in a continuous time domain manner The data symbol to be sent, the resource index k=p*M+m corresponding to R _k , where m is the OFDM symbol index used to transmit the data symbol to be sent where the resource R _k is located, and p is the OFDM symbol index where the resource R _k is used to transmit the data symbol to be sent The subcarrier index on the OFDM symbol of the data symbol. R _k and R _k+1 are two adjacent time domain resources, that is, two subcarriers with the same index on two adjacent OFDM symbols used to transmit data symbols to be sent.

Step 402, from the collection of data symbols Select four symbols A, B, C, D in , these four symbols meet the conditions:

A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* +D·C ^* ＝0

Among them, where S _i belongs to the set of data symbols to be sent, 0≤i≤N-2, * means to take the conjugate;

The four symbols selected in this embodiment are respectively; A=S _k , B=S _k+1 ,

Preferably, k is equal to i, that is, the subscripts of the available resources are the same as the subscripts of the data symbols to be sent.

Preferably, R _k and R _k+1 are resources on the same subcarrier in two adjacent OFDM symbols used to transmit data symbols to be sent.

Step 403. Send A+B and C+D respectively on an available resource R _k and resource R _k+1 on an OFDM symbol used to transmit data symbols to be sent, that is, the data symbols sent on the resource R _k are S _k +S _k+1 , the data symbols sent on resource R _k+1 are

Example 3

Referring to FIG. 1 , assuming that the data symbols to be sent are: S ₀ , S ₁ ,..., S _N-1 , the single-antenna data sending method provided by this embodiment is specifically, assuming that the OFDM used to transmit the data symbols to be sent is The number of symbols is M, and each OFDM symbol has P available subcarriers for transmitting data symbols to be sent. The available resources are R ₀ , R ₁ ,...,R _N-1 , where N=M*P, and the resource index k=m*P+p corresponding to R _k , where m is the resource R _k is used for transmission The OFDM symbol index of the data symbol to be sent, p is the subcarrier index of the OFDM symbol where R _k is used to transmit the data symbol to be sent. R _k and R _k+1 are two adjacent frequency domain resources, that is, two adjacent subcarriers on the same OFDM symbol used to transmit data symbols to be sent.

One of the differences between this embodiment and Embodiment 1 is that, from the data symbol set corresponding to the data symbol S _i to be transmitted The values of the four symbols A, B, C, and D selected in are different. In this embodiment, on a certain OFDM symbol used to transmit data symbols to be sent, select A=S _k , B=S _k+1 , Then the data symbol sent on R _k is S _k +S _k+1 , and the data symbol sent on R _k+1 is

Example 4

Referring to Fig. 3 and Fig. 2, assuming that the data symbols to be sent are: S ₀ , S ₁ ,..., S _N-1 , then the single-antenna data sending method provided in this embodiment is specifically, assuming that it is used to transmit the data to be sent The number of OFDM symbols of a symbol is M, and each OFDM symbol has P available subcarriers for transmitting data symbols to be sent. The available resources are R ₀ , R ₁ ,...,R _N-1 , where N=M*P, and the resource index k=p*M+m corresponding to R _k , where m is the resource R _k is used for transmission The OFDM symbol index of the transmitted data symbol, p is the index of the subcarrier on the OFDM symbol where R _k is used to transmit the data symbol to be transmitted. R _k and R _k+1 are two adjacent time domain resources, that is, two subcarriers with the same index on two adjacent OFDM symbols used to transmit data symbols to be transmitted

The difference between this embodiment and embodiment 2 is that, from the data symbol set corresponding to the data symbol S _i to be sent The values of the four symbols A, B, C, and D selected in are different. In this embodiment, on a certain OFDM symbol used to transmit data symbols to be sent, select A=S _k , B=S _k+1 , Then the data symbol sent on R _k is S _k +S _k+1 , and the data symbol sent on R _k+1 is

Example 5

Referring to Fig. 1 and Fig. 2, assuming that the data symbols to be sent are: S ₀ , S ₁ ,..., S _N-1 , then the single-antenna data sending method provided in this embodiment is specifically, assuming that it is used to transmit the data to be sent The number of OFDM symbols of a symbol is M, and each OFDM symbol has P available subcarriers for transmitting data symbols to be sent. The available resources are R ₀ , R ₁ ,...,R _N-1 , where N=M*P, and the resource index k=m*P+p corresponding to R _k , where m is the resource R _k is used for transmission The OFDM symbol index of the transmitted data symbol, p is the subcarrier index on the OFDM symbol where R _k is located. R _k and R _k+1 are two adjacent frequency domain resources, that is, two adjacent subcarriers on the same OFDM symbol used to transmit data symbols to be sent.

The difference between this embodiment and Embodiment 1 is that, from the data symbol set corresponding to the data symbol S _i to be sent The values of the four symbols A, B, C, and D selected in are different. In this embodiment, on a certain OFDM symbol used to transmit data symbols to be sent, A=S _k is selected, C=S _k+1 , Then the data symbols sent on R _k are The data symbols sent on R _k+1 are

Example 6

Referring to Fig. 3 and Fig. 2, assuming that the data symbols to be transmitted are: S ₀ , S ₁ ,..., S _N-1 , then the method for transmitting data with a single antenna provided in this embodiment is specifically, assuming that it is used to transmit The number of OFDM symbols for data symbols is M, and each OFDM symbol has P available subcarriers for transmitting data symbols to be sent. The available resources are R ₀ , R ₁ ,...,R _N-1 , where N=M*P, and the resource index k=p*M+m corresponding to R _k , where m is the resource R _k is used for transmission The OFDM symbol index of the transmitted data symbol, p is the subcarrier index on the OFDM symbol where R _k is located. R _k and R _k+1 are two adjacent time domain resources, that is, two subcarriers with the same index on two adjacent OFDM symbols used to transmit data symbols to be transmitted

The difference between this embodiment and embodiment 2 is that, from the data symbol set corresponding to the data symbol S _i to be sent The values of the four symbols A, B, C, and D selected in are different. In this embodiment, on a certain OFDM symbol used to transmit data symbols to be sent, A=S _k is selected, C=S _k+1 , Then the data symbol sent on R _k is The data symbols sent on R _k+1 are

Example 7

Referring to Fig. 4 and Fig. 2, assuming that the data symbols to be sent are: S ₀ , S ₁ ,..., S _N-1 , then the method for sending data with a single antenna provided in this embodiment is specifically, assuming that it is used to transmit The number of OFDM symbols for data symbols is M, and each OFDM symbol has P available subcarriers for transmitting data symbols to be sent. The available resources are R ₀ , R ₁ ,...,R _N-1 , where N=M*P, and the resource index k=p*M+m corresponding to R _k , where m is the resource R _k is used for transmission The OFDM symbol index of the transmitted data symbol, p is the index of the subcarrier on the OFDM symbol where R _k is used to transmit the data symbol to be transmitted. R _k and R _k+1 are two adjacent time domain resources, that is, two subcarriers with the same index on two adjacent OFDM symbols used to transmit data symbols to be sent;

One of the differences between this embodiment and Embodiment 2 is that, from the data symbol set corresponding to the data symbol S _i to be transmitted The values of the four symbols A, B, C, and D selected in are different. In this embodiment, on a certain OFDM symbol used to transmit data symbols to be sent, A=S _k is selected, C=S _k+1 , Then the data symbol sent on R _k is The data symbols sent on R _k+1 are

In addition, this embodiment further explains the meaning of "two subcarriers with the same index on two adjacent OFDM symbols used to transmit data symbols to be transmitted", that is, the difference between two adjacent OFDM symbols used to transmit data symbols to be transmitted There may be OFDM symbols used to transmit pilot or other signals in between.

Example 8

Referring to Fig. 5 and Fig. 2, assuming that the data symbols to be transmitted are: S ₀ , S ₁ ,..., S _N-1 , then the method for transmitting data with a single antenna provided in this embodiment is specifically, assuming that it is used to transmit The number of subcarriers on the OFDM symbol of the data symbol is N, and the available resources are R ₀ , R ₁ ,...,R _N-1 . R _k and R _k+1 are two adjacent time domain resources;

From the data symbol set corresponding to the data symbol S _i to be sent The four symbols A, B, C, and D selected in, in this embodiment, A=S _k is selected, C=S _k+1 , Then the data symbol sent on R _k is The data symbols sent on R _k+1 are

Example 9

Referring to Fig. 6 and Fig. 2, assuming that the data symbols to be transmitted are: S ₀ , S ₁ ,..., S _N-1 , then the single-antenna data transmission method provided by this embodiment is specifically, assuming that it is used to transmit the data to be transmitted If the number of subcarriers on an OFDM symbol is N, the available resources are R ₀ , R ₁ ,...,R _N-1 . R _k and R _k+1 are two adjacent frequency domain resources.

From the data symbol set corresponding to the data symbol S _i to be sent Select four symbols A, B, C, D in this embodiment, select A=S _k , B=S _k+1 , Then the data symbol sent on R _k is S _k +S _k+1 , and the data symbol sent on R _k+1 is

Example 10

The embodiment of the present invention also provides a single-antenna data transmission device, which includes:

The mapping mode configuration unit is used to configure the mapping mode of the data symbols S ₀ , S ₁ ,..., _SN-1 to be sent on the available resources R ₀ , R ₁ ,...,R _N-1 , where N is the transmission described The total number of subcarriers of data symbols to be sent;

Data symbol selection unit for selecting from data symbol collection Select moment 4 symbols A, B, C, D, and the 4 symbols meet the conditions:

A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* +D·C ^* ＝0

Among them, 0≤i≤N-2, * represents the conjugate;

A data symbol sending unit, configured to send A+B and C+D on available resources R _k and R _k+1 respectively, where 0≤k≤N-2.

Preferably, the N is the product of the number M of OFDM symbols for transmitting the data symbols to be transmitted and the number P of subcarriers available for transmission of the data symbols to be transmitted in the OFDM symbols;

Further, the mapping mode configured by the mapping mode configuration unit is:

Map the data symbols to be sent in the available resources R _k and R _k+1 in a continuous frequency domain manner, where R _k and R _k+1 are two adjacent frequency domain resources used to transmit the data symbols to be sent .

Further, the mapping mode configured by the mapping mode configuration unit may also be:

Map the data symbols to be sent in the available resources R _k and R _k+1 in a continuous time domain manner, and the R _k and R _k+1 are two adjacent times used to transmit the data symbols to be sent Domain resources.

The broadcast channel single-antenna sending device of the present invention can be used in a system where the broadcast channel transmits the data symbols to be sent.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention.

Claims (13)

1. A single-antenna data transmission method, characterized in that the method comprises: Configure the mapping mode of the data symbols to be sent S ₀ , S ₁ ,...,S _N-1 on the available resources R ₀ , R ₁ ,...,R _N-1 , where N is the total number of transmissions of the data symbols to be sent The number of subcarriers; Send A+B and C+D on R _k and R _k+1 respectively, where A, B, C, and D belong to the data symbol set 0≤i≤N-2, 0≤k≤N-2, and A, B, C, D satisfy the conditions: A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* +D·C ^* ＝0 Among them, the superscript * represents taking the conjugate. 2. The method of claim 1, wherein, The N is the product of the number M of OFDM symbols for transmitting the data symbols to be sent and the number P of subcarriers in the OFDM symbols that can be used to transmit the data symbols to be sent. 3. The method of claim 1, wherein, The R _k and R _k+1 are two adjacent frequency domain resources used to transmit the data symbols to be sent. 4. The method according to claim 3, wherein the mapping method is specifically: The data symbols to be sent are mapped in R _k and R _k+1 in a frequency domain continuous manner, and the resource index corresponding to R _k is k=m*P+p, where m is where the resource R _k is located and is used to transmit the The OFDM symbol index of the data symbol to be sent, p is the subcarrier index on the OFDM symbol where R _k is used to transmit the data symbol to be sent. 5. The method of claim 1, wherein, The R _k and R _k+1 are two adjacent time domain resources used to transmit the data symbols to be sent. 6. The method according to claim 5, wherein the mapping method is specifically: The data symbols to be sent are mapped in the available resources R _k and R _k+1 in a time-domain continuous manner, the resource index _k corresponding to R k=p*M+m, and p is where R _k is used to transmit the The subcarrier index on the OFDM symbol of the data symbol to be sent, m is the OFDM symbol index where the resource R _k is used to transmit the data symbol to be sent. 7. The method according to claim 1, wherein the data symbol S _i in the data symbol set is the same as the subscript of the available resource R _k , that is, k is equal to i. 8. The method according to claim 1, wherein the method is applied to a broadcast channel, and the available resources are resources of the broadcast channel for transmitting the data symbols to be sent. 9. A single-antenna transmitting device, characterized in that the device comprises: The mapping mode configuration unit is used to configure the mapping mode of the data symbols S ₀ , S ₁ ,..., _SN-1 to be sent on the available resources R ₀ , R ₁ ,...,R _N-1 , where N is the transmission described The total number of subcarriers of data symbols to be sent; Data symbol selection unit for selecting from data symbol collection Select 4 symbols A, B, C, and D in , where 0≤i≤N-2, and the A, B, C, and D satisfy the conditions: A·C ^* +B·D ^* ＝C·A ^* +D·B ^* ＝A·B ^* +C·D ^* ＝B·A ^* +D·C ^* ＝0 The superscript * represents the conjugate; A data symbol sending unit, configured to send A+B and C+D on available resources R _k and R _k+1 respectively, where 0≤k≤N-2. 10. The apparatus of claim 9, wherein: The N is the product of the number M of OFDM symbols for transmitting the data symbols to be sent and the number P of subcarriers in the OFDM symbols that can be used to transmit the data symbols to be sent. 11. The device according to claim 9, wherein the mapping method configured by the mapping method configuration unit is specifically: The data symbols to be sent are mapped to R _k and R _k+1 in a continuous frequency domain manner, and R _k and R _k+1 are two adjacent frequency domain resources used to transmit the data symbols to be sent. 12. The device according to claim 9, wherein the mapping method configured by the mapping method configuration unit is specifically: Map the data symbols to be sent in the available resources R _k and R _k+1 in a continuous time domain manner, and the R _k and R _k+1 are two adjacent times used to transmit the data symbols to be sent Domain resources. 13. The apparatus of claim 9, wherein: The available resources are resources of a broadcast channel used to transmit the data symbols to be sent.