WO2014117622A1

WO2014117622A1 - Methods and apparatuses for sending data and receiving data

Info

Publication number: WO2014117622A1
Application number: PCT/CN2013/091113
Authority: WO
Inventors: 张昌明; 肖振宇; 刘颖; 郁光辉; 金德鹏
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-01-31
Filing date: 2013-12-31
Publication date: 2014-08-07
Also published as: CN103973398A

Abstract

Disclosed are methods and apparatuses for sending data and receiving data. The method for sending data comprises: encapsulating to-be-sent data to obtain one or more data frames, the foregoing data frames comprising a data information block and a special word arranged in a spaced manner and the foregoing special word being formed by one or more repeated pseudo random sequence; and sending the foregoing one or more data frames. By means of the present invention, the technical problem is solved that a data sending method in a related technology cannot be used in a connection-oriented communications scenario, and technical effects of functions such as rapid capture, carrier synchronization, channel estimation, data protection and phase tracking are achieved.

Description

Data transmission, data receiving method and device

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a data transmission and data receiving method and apparatus. BACKGROUND OF THE INVENTION E-band contains two unchannelized frequency bands: 71-76 GHz and 81-86 GHz. Compared with other frequency bands,

The E-band band has a very significant advantage, mainly in the following two aspects:

1) The bandwidth is up to 10 GHz, which is almost 50 times that of the entire frequency band of various low-frequency mobile communication services, and is much higher than the widely used microwave band. This wide frequency band makes it possible to implement a new generation of wireless high-rate transmission. 2) The spectrum in the microwave frequency band of the lower frequency is usually very finely re-divided. For example, in the US FCC, each microwave band is divided into a series of sub-bands not exceeding 50MHz. This detailed division ultimately limits the channel. Data throughput. However, E-band is not further divided after being divided into two 5GHz bands. The bandwidth of 5 GHz is nearly 100 times that of the maximum microwave band and higher than the 60 GHz and 90 GHz bands, so E-band signals can carry more data. . The transmission channel of the E-band is mainly Line of Sight (LOS). The multipath phenomenon is not obvious. Therefore, Orthogonal Frequency Division Multiplexing (OFDM) is not required. Multi-carrier mode to overcome inter-symbol interference; on the other hand, E-band communication spectrum resources are very rich, and multi-carrier modulation is not needed to improve spectrum utilization. Therefore, the single carrier mode is more suitable for E-band communication than the multi-carrier system. However, at present, there is no complete communication scheme for E-band at home and abroad, and there is no relevant background to design the corresponding physical layer signal transmission method. For 60 GHz millimeter wave communication, the international and domestic industry is setting off a wave of system design and solution research. The E-band is closer to the 60 GHz band and belongs to the millimeter wave communication category. The single-carrier 60 GHz physical layer signal transmission method proposed by the IEEE 802.11ad standard group is briefly introduced as a background art. The physical layer signal transmission method of single-carrier 60 GHz millimeter wave communication is shown in Fig. 1. The structure in Figure 1 is designed for burst packet communication environments. Short training sequence field (Short Training)

Field, abbreviated as STF, will be used for packet arrival detection, AGC, frequency offset estimation, clock synchronization, and consists of 14 Gal28 and 1 -Gal28. The Channel Estimation (CE) will be used for channel response estimation, which consists of complementary Golay sequences Gu512, Gv512, and Gvl28. Header part is a packet Key information, including scrambler seed, modulation coding type, packet length, packet type, and so on. A block of data (Block, abbreviated as BLK) consists of a Guard Insertion (GI) and a B DATA, where DATA carries the data payload (Payload). The above scheme is mainly designed for burst packet communication. However, the communication environment of E-band will mainly be a connection-oriented application. If the physical layer signaling method shown in Figure 1 is directly used for E-band, There are many defects. First of all, the processing of the preamble (STF and CE) is very important. If the data of the leading part is wrong, the entire packet will not be received correctly, and this will not achieve fast synchronization of the system. Secondly, the CE is located before the BLK, that is, the channel estimation is performed before the Payload arrives. Later, the Payload partial equalization relies on the channel estimation result of the preamble. If the channel changes, the equalizer will not be adaptively adjusted. For the above reasons, the data transmission method in the above related art cannot be applied to a connection-oriented communication scenario. In response to the above problems, no effective solution has been proposed yet. SUMMARY OF THE INVENTION Embodiments of the present invention provide a data transmission and data receiving method and apparatus, to at least solve the technical problem that the data transmission method in the prior art cannot be applied to a connection-oriented communication scenario. According to an aspect of the embodiments of the present invention, a data sending method is provided, including: encapsulating a data to be sent to obtain one or more data frames, where the data frame includes: a data information block and a unique word arranged in an inter-phase manner, Wherein the unique word is composed of one or more repeated pseudo-random sequences; the one or more data frames are transmitted. Preferably, the encapsulating the data to be sent to obtain one or more data frames further comprises: adding a Cyclic Prefix (CP) to the one or more repeated pseudo-random sequences in the unique word, where Adding at most one of the CPs to one of the unique words. Preferably, the length and content of the unique words located in the same data frame are the same, and the length and content of the unique words located in different data frames are the same or different. Preferably, the length and modulation mode of one or more data information blocks located in the same data frame are the same, and the length and modulation mode of the data information blocks located in different data frames are the same or different. Preferably, the length and modulation mode of the data information block in each of the data frames are in one-to-one correspondence with the unique words located in the data frame. Preferably, the pseudo random sequence comprises at least one of the following: a PN random sequence, a Golay random sequence, and a ZC random sequence. Preferably, one of the unique words and one of the data information blocks constitute a data block, and each of the one or more data frames is composed of one or more of the data blocks. Preferably, the unique word is used to implement at least one of the following functions: acquisition, carrier synchronization, channel estimation, data protection, phase tracking. Preferably, it is applied to signal transmission of a connection-oriented E-band communication physical layer. According to another aspect of the embodiments of the present invention, a data receiving method is provided, including: receiving a data frame, where the data frame includes: a data information block and a unique word arranged in an inter-phase, wherein the unique word is Or a plurality of repeated pseudo-random sequences; decapsulating the data frame to obtain data carried in the data frame. Preferably, the one or more repeated pseudo-random sequences in the unique word are also preceded by a cyclic prefix CP, wherein at most one of the CPs is added to one of the unique words. Preferably, the length and modulation mode of the data information block in each of the data frames are in one-to-one correspondence with the unique words located in the data frame. Preferably, the pseudo random sequence comprises at least one of the following: a PN random sequence, a Golay random sequence, and a ZC random sequence. Preferably, it is applied to signal reception of a connection-oriented E-band communication physical layer. According to another aspect of the present invention, a data transmitting apparatus is provided, including: an encapsulating unit, configured to encapsulate one or more data frames to be sent, wherein the data frame includes: data arranged in phase An information block and a unique word, wherein the unique word is composed of one or more repeated pseudo-random sequences; and a transmitting unit configured to transmit the one or more data frames. Preferably, the one or more repeated pseudo-random sequences in the unique word are also preceded by a cyclic prefix CP, wherein at most one of the CPs is added to one of the unique words. Preferably, the length and modulation mode of the data information block in each of the data frames are in one-to-one correspondence with the unique words located in the data frame. Preferably, the pseudo random sequence comprises at least one of the following: a PN random sequence, a Golay random sequence, and a ZC random sequence. According to another aspect of the present invention, a data receiving apparatus is provided, including: a receiving unit, configured to receive a data frame, where the data frame includes: a data information block and a unique word arranged in an inter-phase, where The unique word is composed of one or more repeated pseudo-random sequences; a decapsulation unit is configured to decapsulate the data frame to obtain data carried in the data frame. Preferably, the one or more repeated pseudo-random sequences in the unique word are also preceded by a cyclic prefix CP, wherein at most one of the CPs is added to one of the unique words. Preferably, the length and modulation mode of the data information block in each of the data frames are in one-to-one correspondence with the unique words located in the data frame. Preferably, the pseudo random sequence comprises at least one of the following: a PN random sequence, a Golay random sequence, and a ZC random sequence. In the embodiment of the present invention, the data to be sent is encapsulated to finally obtain a data frame in which the unique word and the data information are arranged, and then the data frame is sent, because the format of the data frame is a unique word and the data information is arranged to solve the problem. The data transmission method in the related art cannot be applied to the technical problem of the connection-oriented communication scenario, and the technical effects of realizing functions such as fast acquisition, carrier synchronization, channel estimation, data protection, and phase tracking are achieved. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a physical layer signal transmission manner according to the related art; FIG. 2 is a preferred flowchart of a data transmission method according to an embodiment of the present invention; FIG. 3 is a physical layer according to an embodiment of the present invention. FIG. 4 is a block diagram showing a preferred configuration of a data transmitting apparatus according to an embodiment of the present invention; FIG. 5 is a signal transmitting manner of a preferred embodiment 1 of the present invention; Figure 6 is a signal transmission method of a preferred embodiment 2 of the present invention; and Figure 7 is a signal transmission method of a preferred embodiment 3 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. An embodiment of the present invention provides a preferred data sending method. As shown in FIG. 2, the method includes the following steps: Step S202: Encapsulating a data to be sent to obtain one or more data frames, where the data frame includes: The arranged data information block (hereinafter referred to as DATA) and the unique word (Unique Word, hereinafter referred to as UW), wherein the UW is composed of one or more repeated pseudo-random sequences. Gp, UW is composed of several identical pseudo-random sequences of length N. As shown in Fig. 3, δΡ, a plurality of random sequences located in the same UW are the same. Preferably, the so-called same content and length are Are the same. Step S204: Send the one or more data frames. In the above preferred embodiment, the data to be transmitted is encapsulated to finally obtain a data frame arranged between the UW and the DATA, and then the data frame is transmitted, because the format of the data frame is UW and DATA, wherein the UW adopts a unique The design of the repeated pseudo-random sequence solves the technical problem that the data transmission method in the related art cannot be applied to the connection-oriented communication scenario, and achieves functions of fast acquisition, carrier synchronization, channel estimation, data protection, phase tracking, and the like. Technical effects. Preferably, the corresponding frame structure of the present invention is as shown in FIG. 3, that is, equivalent to only the data block (BLK) in the background art constitutes a data frame (ie, one UW and one DATA constitute one BLK, one or Each of the plurality of data frames is composed of one or more of the BLKs, wherein the UW is used to implement functions such as acquisition, carrier synchronization, channel estimation, data protection, phase tracking, etc. in the related art, for example, UW replaces the role of implementing short training sequence (STF), channel estimation domain (CE), guard sequence (GI), and so on. The UW may be composed of a plurality of pseudo-random sequences of the same length N, and optionally add a CP of length M (M<N) to the head of the UW as needed, and the CP may be combined with a pseudo-random sequence. The last M bits of the sequence are identical. Here, UW's main functions are: (1) fast acquisition by data matching; (2) more accurate frequency offset estimation; (3) relatively accurate noise power estimation, which is also SNR estimation; (4) channel Estimate; (5) In frequency domain equalization, the entire UW also acts as a cyclic prefix for BLK; (6) Timing synchronization and carrier tracking. In this way, the shortcomings of the prior art that cannot achieve fast synchronization and real-time channel estimation are overcome, and the technical problems that the frequency offset estimation, the noise power estimation and the phase tracking existing in the prior art are difficult to implement accurately and accurately are solved. It is suitable for connection-oriented transmission environment, which can realize fast capture and synchronization. At the same time, it is easy to realize frequency offset extraction step by step, which is convenient for noise power estimation and can achieve more accurate phase tracking. DATA is used to carry the communication load, and different modulation and coding methods can be used as needed. In a preferred embodiment, it may also be determined according to system requirements whether a CP of a pseudo-random sequence needs to be added before one or more repeated pseudo-random sequences in the UW. In practical applications, whether or not to add a CP can be determined according to system requirements such as channel conditions. If the channel response length is L, M+NL>D needs to be satisfied, where D can be used to achieve accurate frequency offset estimation and noise power estimation. margin. Preferably, the length of the UW and the length of the DATA in the data frame require appropriate control. The UW length is too short, which will inevitably reduce the performance of key parts such as capture and synchronization. If the UW length is too long, the system transmission efficiency will decrease. Therefore, the choice of UW length requires a compromise between performance and efficiency. In addition, in the frequency domain equalization, in order to facilitate the implementation of Fast Fourier Transform (FFT) or Inverse Fast Fourier Transform (IFFT), The length of the UW plus DATA needs to be set to an integer power of two. Preferably, the UW portion can generally adopt low-order modulation to reduce the bit error rate and improve the performance of key modules such as capture and synchronization, and the DATA portion can adopt different modulation modes. The data frame type can be divided into a single data frame and a plurality of data frame combinations. The length and content of the above UW can be changed, and there is no need to notify the receiving end, and the receiving end can know the change by blind detection. Define a number of UW+DATA as data frames, and a UW+DATA is a BLK as a unit. Within a data frame, the content and length of the UW, the length and modulation of the DATA are certain, and different data frames may A change has occurred. Preferably, the UW includes a plurality of repeated pseudo-random sequences, wherein the pseudo-random sequences located in the same UW are the same. The above pseudo-random sequence may include, but is not limited to, the following three types: a PN random sequence, a Golay random sequence, and a ZC random sequence. It can be seen from the above that the length and content of one or more UWs located in the same data frame are the same, however, the length and content of the UWs located in different data frames may be different, for example, located in different data frames. The types of pseudo-random sequences in the UW are different, or the number of repetitions is different, and so on. In a preferred embodiment, the length and modulation of the DATA located in the same data frame are the same, and the length and content of the DATA located in different data frames may be the same or different. In order to achieve the correspondence between DATA and UW in each data frame, the length of DATA and the type of modulation in different data frames are fixed, and the length and modulation mode of DATA in each data frame are one-by-one with UW in the data frame. corresponding. In this embodiment, a data receiving method is further provided, including: receiving a data frame, where the data frame includes: DATA and UW arranged in phase, wherein the UW is composed of one or more repeated pseudo-random sequences Decapsulating the data frame to obtain data carried in the data frame. Correspondingly, the format of the data frame corresponding to the received data is the same as the structure of the data frame in the foregoing sending method, and details are not described herein again. Preferably, the receiving end can know the length and content of the UW in the data frame by using blind detection. In this embodiment, a data transmitting apparatus is also provided, which is configured to implement the above-described embodiments and preferred embodiments, and has not been described again. As used hereinafter, the term "unit" or "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and conceivable. 4 is a block diagram showing a preferred structure of a data transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 4, the method includes: a packaging unit 402 and a transmitting unit 404. The structure will be described below. The encapsulating unit 402 is configured to encapsulate the data to be sent to obtain one or more data frames, where the data frame includes: DATA and UW arranged in phase, wherein the UW is composed of one or more repeated pseudo-random sequences; Unit 404, coupled to encapsulation unit 402, is configured to transmit the one or more data frames. In a preferred embodiment, the encapsulating unit 402 is further configured to determine, according to system requirements, whether a CP of a pseudo-random sequence needs to be added before one or more repeated pseudo-random sequences in the UW, wherein at most one CP is added to one UW. . In each of the above preferred embodiments, the data transmitting method and the data transmitting apparatus may be configured to transmit signals to the connected E-band communication physical layer. The data sending method and device provided by the embodiments of the present invention are suitably configured as a connection-oriented transmission environment, and can implement fast capture and synchronization. The methods and apparatus of the embodiments of the present invention for acquisition, frequency offset estimation, noise power estimation, channel estimation, and the like can be implemented in any UW, and the schemes provided in the background art can be implemented only in the header. Preferably, the data sending method and apparatus provided by the embodiments of the present invention facilitate step-by-step implementation of frequency offset extraction. On the one hand, UW has the same pseudo-random sequence inside, and these same pseudo-random sequences are close, even at large Phase aliasing will not occur when the frequency is off, so the initial frequency offset can be extracted by comparison when the signal is received. On the other hand, the UW of each BLK is exactly the same, and the two UWs are far apart, under the fine frequency offset. It is also possible to produce significant phase deviations. Therefore, after the initial frequency offset correction, the residual frequency offset can be extracted using the UW between the BLKs. The data transmitting method and apparatus provided by the embodiments of the present invention can also facilitate the estimation of the noise power, and the simple noise power estimation also needs two identical sequences, and is compared in the received signal. However, if the two sequences of the same sequence are far apart, their difference does not only include noise information, but also may be caused by residual small frequency offset, phase noise, etc., so the noise power extraction is not accurate. In the background, the length of the two segments of Gal28 is 128, and the length of the random sequence in the embodiment of the present invention can be much smaller than the length (the two random intervals within the corresponding UW are also much smaller), so the noise power is extracted more. Effective, signal-to-noise ratio estimates are also more accurate. More accurate phase tracking can be achieved. In the frequency domain equalization, each fast FFT window can guarantee at least one and the same random sequence before and after the IFFT, so that a phase offset can be extracted before and after the window after IFFT, and then obtained by interpolation. The internal phase of each symbol should be compensated for, which is better against the effects of residual carrier offset and phase noise. The invention is further described in the preferred embodiments of the invention, but it is intended that the preferred embodiments are not intended to limit the invention. Preferred Embodiment 1 As shown in FIG. 5, in the preferred embodiment, the length and content of the UW, the length of the DATA, and the modulation mode are all unchanged, that is, there is only one data frame structure, and the data frame is No CP is added to the UW. Preferably, the number of segments of the random sequence (ie, the number of repetitions n) can be configured to different but uniform values, for example: the number of repetitions can be 2, 3, 4, etc., and the random sequence can also be PN, Golay, Zadoff-Chu, etc. In any form, the length of the random sequence can also be configured according to the actual situation. The length of the DATA part and the modulation method can also be configured as needed. For example, the parameters of the specific configuration can be configured according to the configuration in Table 1: Table 1

Since the random sequence number n in the UW in Table 1 is 4, the random sequence attempt is 15, and the DATA length is 452, 4*15+452=512. Therefore, the length of each BLK is 512, which is exactly 2 Integer power, selecting such a data frame can facilitate the implementation of FFT/IFFT in frequency domain equalization. Preferred Embodiment 2 As shown in FIG. 6, in the preferred embodiment, the length and content of the UW, the length of the DATA, and the modulation mode are all unchanged, that is, there is only one data frame structure, but is added in the UW header. CP. Similar to the above preferred embodiment 1, the number of segments n of the random sequence can also be configured as different but uniform values, for example: 2, 3, 4, etc., the random sequence can also adopt any form such as PN, Golay, Zadoff-Chu, random sequence. The length and length of the CP can also be configured according to the actual situation. The length of the DATA part and the modulation method can also be configured as needed. For example, the parameters of the specific configuration can be configured according to the configuration in Table 2: Table 2

Preferred Embodiment 3 As shown in Fig. 7, in the preferred embodiment, three data frames are included, each of which contains T BLKs. The UW of the first data frame is composed of two PN sequences plus CP, the UW of the second data frame is composed of three ZC sequences, and the UW of the third data frame is composed of three Ga32 (Golay sequence) plus CP. . The parameters of the specific configuration can be configured according to the configuration in Table 3:

Table 3 UW random sequence repetition number of data frame 1 n 2 UW random sequence type of data frame 1 and CP length of length PN sequence data frame 1 UW of data frame 1 DATA length and modulation mode of data frame 1 944, BPSK UW random sequence repetition number of data frame 2 n 3 UW random sequence type of data frame 2 and ZC sequence of length 20

Data frame 2 DATA length and modulation mode 964, QPSK data frame 3 UW random sequence repetition number n 3 Data frame 3 UW random sequence type and length length 32 Golay sequence data frame 3 UW CP length 14 data frame 3 DATA Length and Modulation Mode 1014, 16-QAM In another embodiment, software is also provided for performing the technical solutions described in the above embodiments and preferred embodiments. In another embodiment, a storage medium is provided, the software being stored, including but not limited to: an optical disk, a floppy disk, a hard disk, a rewritable memory, and the like. From the above description, it can be seen that the embodiment of the present invention achieves the following technical effects: encapsulating the data to be transmitted, finally obtaining a data frame arranged between UW and DATA, and then transmitting the data frame, because the format of the data frame is UW and DATA are arranged to solve the technical problem that the data transmission method in the related art cannot be applied to the connection-oriented communication scenario, and the technical effects of realizing functions such as fast acquisition, carrier synchronization, channel estimation, data protection, and phase tracking are achieved. . Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention. Industrial Applicability As described above, a data transmission and data receiving method and apparatus provided by an embodiment of the present invention have the following beneficial effects: encapsulating data to be transmitted, finally obtaining a data frame in which UW and DATA are arranged, and then transmitting the data frame. Because the composition format of the data frame is UW and DATA interphase arrangement, the technical problem that the data transmission method in the related art cannot be applied to the connection-oriented communication scenario is solved, and the fast acquisition, carrier synchronization, channel estimation, and data protection are achieved. Technical effects of functions such as phase tracking.

Claims

Claim

A data transmission method, comprising:

Encapsulating the transmitted data to obtain one or more data frames, wherein the data frame comprises: a data information block and a unique word arranged in an inter-phase, wherein the unique word is composed of one or more repeated pseudo-random sequences;

Sending the one or more data frames.

2. The method according to claim 1, wherein the encapsulating the data to be sent to obtain one or more data frames further comprises:

A cyclic prefix CP is added before the one or more repeated pseudo-random sequences in the unique word, wherein at most one of the CPs is added to one of the unique words.

3. The method of claim 1, wherein the length and content of the unique words located in the same data frame are the same, and the length and content of the unique words located in the different data frames are the same or different.

4. The method according to claim 1, wherein the length and modulation mode of one or more data information blocks located in the same data frame are the same, and the length and modulation mode of the data information block located in different data frames is Same or different.

The method according to claim 1, wherein the length and modulation manner of the data information block in each of the data frames are in one-to-one correspondence with the unique words located in the data frame.

The method according to any one of claims 1 to 5, wherein the pseudo random sequence comprises at least one of the following: a PN random sequence, a Golay random sequence, and a ZC random sequence.

The method according to any one of claims 1 to 5, wherein one of the unique words and one of the data information blocks constitute a data block, and each of the one or more data frames is Consists of one or more of the data blocks.

The method according to any one of claims 1 to 5, wherein the unique word is used to implement at least one of the following functions: acquisition, carrier synchronization, channel estimation, data protection, phase tracking.

The method according to any one of claims 1 to 5, wherein the signalling is applied to a connection-oriented E-band communication physical layer.

10. A method of receiving data, comprising:

Receiving a data frame, where the data frame includes: a data information block and a unique word arranged in an inter-phase, wherein the unique word is composed of one or more repeated pseudo-random sequences;

Decapsulating the data frame to obtain data carried in the data frame.

11. The method of claim 10, wherein the one or more repeated pseudo-random sequences in the unique word are also preceded by a cyclic prefix CP, wherein one of the unique words is added to at most one Said CP.

12. The method of claim 10, wherein the length and modulation of the data information blocks in each of the data frames are in one-to-one correspondence with unique words located in the data frame.

The method according to any one of claims 10 to 12, wherein the pseudo random sequence comprises at least one of the following: a PN random sequence, a Golay random sequence, and a ZC random sequence.

The apparatus according to any one of claims 10 to 12, wherein the signal is applied to a connection-oriented E-band communication physical layer.

15. A data transmitting device, comprising:

Encapsulating unit, configured to encapsulate the data to be sent to obtain one or more data frames, where the data frame comprises: a data information block and a unique word arranged in an inter-phase, wherein the unique word is composed of one or more repeated pseudo Random sequence composition;

a sending unit, configured to send the one or more data frames.

16. The apparatus of claim 15, wherein the one or more repeated pseudo-random sequences of the unique words are also preceded by a cyclic prefix CP, wherein one of the unique words is added to at most one Said CP.

17. Apparatus according to claim 15 wherein the length and modulation of the blocks of data information in each of said data frames are in one-to-one correspondence with unique words located in the data frame.

The apparatus according to any one of claims 15 to 17, wherein the pseudo random sequence comprises at least one of the following: a PN random sequence, a Golay random sequence, and a ZC random sequence.

19. A data receiving device, comprising: a receiving unit, configured to receive a data frame, where the data frame includes: a data information block and a unique word arranged in an inter-phase, wherein the unique word is composed of one or more repeated pseudo-random sequences; a decapsulation unit, The data frame is set to decapsulate to obtain data carried in the data frame.

20. The apparatus of claim 19, wherein the one or more repeated pseudo-random sequences in the unique word are also preceded by a cyclic prefix CP, wherein one of the unique words is added to at most one Said CP.

21. Apparatus according to claim 19 wherein the length and modulation of the blocks of data information in each of said data frames are in one-to-one correspondence with unique words located in the data frame. The apparatus according to any one of claims 19 to 21, wherein the pseudo random sequence comprises at least one of: a PN random sequence, a Golay random sequence, and a ZC random sequence.