WO2011140987A1

WO2011140987A1 - Method and apparatus for transmitting data

Info

Publication number: WO2011140987A1
Application number: PCT/CN2011/073974
Authority: WO
Inventors: 董朋朋; 肖洁华
Original assignee: 华为技术有限公司
Priority date: 2010-05-12
Filing date: 2011-05-12
Publication date: 2011-11-17
Also published as: CN102244558A; CN102244558B

Abstract

The embodiments of the present invention provide a method and an apparatus for transmitting data. The effective information symbols in one transmission unit with transmission time T, are distributed to N sub-transmission units, and the total transmission time of the N sub-transmission units is T. By means of adjusting the number of the training sequence symbols and the cyclic prefix symbols in each sub-transmission unit, the aim of improving the processing performance of PCE (Pre-coded EGPRS2 (Enhanced GPRS (General Packet Radio Service) Phase 2)) scheme can be achieved.

Description

Method for transmitting data 1B This application claims priority to Chinese Patent Application No. 201010178336.9, entitled "Method and Apparatus for Sending Data", filed on May 12, 2010, the entire contents of which are incorporated by reference. In this application. Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for transmitting data. Background technique

Global System for Mobile Communications / Global Mobile Telecommunications System Enhanced Data Rate Evolution Version Radio Access Network

(GSM/GERAN: Global System for Mobile Communications/GSM EDGE Radio Access Network) The evolution of system packet radio services is General Packet Radio Service (GPRS), enhanced general packet radio service.

(EGPRS: Enhanced GPRS), Enhanced General Packet Radio Service Phase 2 (EGPRS2: Enhanced GPRS Phase 2). The performance improvement of packet data services is mainly due to the increase in data throughput. Among them, the physical layer of GPRS still uses Gaussian filtering minimum frequency shift keying in GSM

(GMSK: Gaussian Filtered Minimum Shift Keying) modulation, channel coding using CS1~CS4, EGPRS introduces 8 phase shift keying based on the original GMSK modulation

(8PSK: 8 Phase Shift Keying) modulation, channel coding uses MCS1~MCS4 (corresponding to GMSK modulation) and MCS5~MCS9 (corresponding to 8PSK modulation). Further evolution of EGPRS2 introduces higher order modulation and new coding methods. The technology evolution of EGPRS2 is more complicated, and it is divided into two stages: EGPRS2-A and EGPRS2-B. EGPRS2-A introduces higher order modulation (16QAM and 32QAM) and new encoding methods (DAS5~DAS12 and UAS7~UAS11), EGPRS2-B introduces new modulation (QPSK, 16QAM and 32QAM) and encoding (DBS5~ DBS12 and High symbol rates have also been introduced in addition to UBS5~UBS12).

At present, an existing EGPRS2 improvement technology is (PCE: Pre-coded EGPRS2, EGPRS2 precoding) scheme, by introducing an Inverse Discrete Fourier Transform (IDFT) at the modulation end, and introducing a discrete Fu at the receiving end. The DFT: Discrete Fourier Transform operation converts EGPRS2 time domain signal processing into frequency domain signal processing, which effectively reduces receiver complexity while achieving better throughput performance and combat TX/RX Impairments. Ability to receive defects).

In the research on the prior art, the inventor found that: In the existing PCE scheme, the transmitting end adopts a burst (pulse) with a fixed time T in the current GERAN system as a transmitting unit, and its common symbol rate (NSR: Norma) l Symbol Ra te ) The structure diagram of the lower pulse is shown in Figure 1. In this transmission unit, there are 116 valid information symbols (Dl, ..., D116) and 26 training sequence symbols (TS1, ..., TS26). ), where the valid information refers to the information to be sent after the user data is channel-coded; and at the forefront of the sending unit is a cyclic prefix (CP: Cyclic Prefix) symbol, and the other end is a guard time (GP: Guard Period). Figure 2 shows the subcarrier distribution in the existing PCE transmission scheme. Since the subcarrier spacing is small, only 1.9kHZ, the existing PCE scheme is sensitive to frequency error, that is, the frequency error is less robust. SUMMARY OF THE INVENTION Embodiments of the present invention provide a method and apparatus for transmitting data.

A method for transmitting data, comprising: dividing XI pieces of valid information symbols in one transmitting unit with a transmission time T into N sub-transmission units, and inserting training sequence symbols in each sub-transmission unit, the N sub-transmission units The sum of the number of the valid information symbols is less than or equal to XI, and the sum Y2 of the number of training sequence symbols in the N sub-transmission units is smaller than the number Y1 of the training sequence symbols in the one transmitting unit; Each of the sub-transmission units performs symbol mapping, discrete Fourier inverse transform, and cyclic prefix operation in sequence; and adds P guard time interval symbols to the back end of the last sub-transmission unit of the N sub-transmission units; Increased protection The N sub-transmission units after the guard interval perform transmission pulse shaping; transmitting, after the pulse shaping of each of the N sub-transmission units, the total transmission time of the N sub-transmission units is T; A transmitting unit with a transmission time T includes XI valid information symbols, Y1 training sequence symbols, Z1 cyclic prefix symbols, and P guard time symbols, and the total number of symbols included in the N sub-transmission units is equal to the The total number of symbols included in a transmission unit, and the XI, Y1, Z1, Ρ, Υ2, and Ν are integers.

A processor, comprising: an allocating unit, configured to divide XI pieces of valid information symbols in one transmitting unit with a transmission time of Ν into one sub-sending unit and insert training sequence symbols in each sub-sending unit, where The sum of the number of valid information symbols in the sub-sending unit is less than or equal to XI, and the sum Υ2 of the number of training sequences in the one sub-sending unit is smaller than the number Y1 of the training sequence in the one transmitting unit; And performing symbol mapping on the symbols in each of the sub-transmission units of the sub-transmission unit; and an inverse discrete Fourier transform unit, configured to perform discrete Fu on the symbols in each sub-transmission unit in the sub-transmission units An inverse kernel transform unit, configured to add a cyclic prefix symbol to a front end of each of the sub-transmission units of the sub-transmission unit, and a guard time processing unit, configured to send the last sub-send of the sub-transmission unit The back end of the unit is added with a guard time interval symbol; a transmit pulse shaping unit is configured to send the ones Each of the sub-transmission units in the unit performs transmission pulse shaping; the transmitting unit is configured to send, after the pulse shaping of each of the sub-transmission units, the total transmission time of the sub-transmission units, where The sending unit having the sending time Τ includes XI valid information symbols, Y1 training sequence symbols, Z1 cyclic prefix symbols, and one guard time symbol, and the total number of symbols included in the one sub-sending unit is equal to The total number of symbols included in the one transmitting unit, and the XI, Y1, Z1, Ρ, Υ2, and Ν are integers.

An apparatus, comprising: one or more processors, the one or more processors for performing the method of transmitting data as described above. With the above embodiments of the present invention, the processing performance of the PCE scheme can be improved. DRAWINGS Figure 1 shows a block diagram of a transmitting unit.

Figure 2 shows a subcarrier distribution diagram for a multi-carrier system.

Figure 3 shows by way of example a schematic diagram of a communication system in one embodiment of the present invention.

Figure 4 shows, by way of example, a schematic diagram of a method of transmitting data in one embodiment of the present invention.

Figure 5 shows, by way of example, a schematic diagram of dividing a valid information symbol into two sub-transmission units in one embodiment of the present invention.

Figure 6a shows, by way of example, a schematic diagram of dividing a valid information symbol into two sub-transmission units in another embodiment of the present invention.

Figure 6b shows, by way of example, a schematic diagram of dividing a valid information symbol into two sub-transmission units in yet another embodiment of the present invention.

Figure 7a shows, by way of example, a schematic diagram of two sub-transmission units after an increased guard time processing in one embodiment of the present invention.

Figure 7b shows, by way of example, another schematic diagram of two sub-transmission units after additional protection time processing in another embodiment of the present invention.

Figure 8 shows, by way of example, a subcarrier distribution map in a multi-carrier system in one embodiment of the present invention.

Figure 9 shows, by way of example, a schematic diagram of a unit of an apparatus in one embodiment of the invention. detailed description

Figure 3 shows, by way of example, a communication system 100 in one embodiment of the present invention. One or more receiving ends 120. For example, communication system 100 can be located in a GERAN network.

For example, data communication between the transmitting end 110 and the receiving end 120 can be data communication between the base station and the terminal. The base station can be a base station located in the GERAN network. The terminal can be A radio device, a cellular telephone device, a computing device, a personal communication system device, or any other device that is equipped with wireless communication.

In the communication system 100, the pulse structure transmitted by the transmitting end 110 can divide the pulse structure in the existing PCE scheme into N sub-pulses, so that the number of symbols in each sub-pulse sent by the transmitting end 110 is compared with the existing PCE scheme. The number of symbols in the pulse is small, that is, the sub-pulse sent by the transmitting end 110 supports a smaller transmission time interval, thereby increasing the width of the sub-carrier, improving the defect of the PCE scheme sensitive to the frequency error, and enhancing the robustness of the PCE scheme. . In an embodiment of the invention, the pulses may be referred to as transmitting units and the sub-pulses may be referred to as sub-transmitting units.

Figure 4 shows, by way of example, a method of transmitting data provided in one embodiment of the present invention. The method includes the following parts.

210. The XI valid information symbols in one sending unit with a sending time T are allocated to the N sub-transmission units, and the training sequence symbols are inserted in each sub-transmission unit, so that the number of valid information symbols in the N sub-transmission units is And less than or equal to XI, the sum Y2 of the number of training sequence symbols in the N sub-transmission units is smaller than the number Y1 of training sequence symbols in the one transmitting unit, where XI, Yl, Υ2, Ν are integers, The number of each sub-transmission unit is an integer greater than or equal to 1 and less than or equal to Ν.

For example, under the normal symbol rate (NSR: Norma l Symbol Ra te ), if there is no change character, that is, by two consecutive sub-transmission units, N is equal to 2, and the number of valid information symbols XI of the original transmission unit is equal to 116. The number of training sequence symbols Y1 is equal to 26. In order to make each sub-transmission unit have enough space for placing the CP, 26 training sequence symbols can be appropriately reduced, so that the training sequence symbols in the two sub-transmission units are total. The number is reduced to 20, that is, Y2 is equal to 20. Since the sub-transmission unit and the one transmission unit have the same symbol mapping manner, then the sum of the effective information symbols of the two sub-transmission units is equal to XI. Similarly, at high symbol rate (HSR: Hi gher Symbol Ra te ), if the form of the symbol mapping is not changed, XI can be equal to 138, Y1 is equal to 31, Y2 is equal to 23, N is equal to 2, and the two sub-transmission unit valid information symbols The sum is equal to XI. In another embodiment of the present invention, the information in the N sub-transmission units of the transmitting end may adopt a high-order modulation manner, and the number of valid information symbols occupied by the same valid information bits may be reduced by using high-order modulation. The sum of the number of valid information symbols in the sub-transmission unit may be smaller than XI.

The training sequence symbols can be uniformly distributed in the middle of the valid information symbols. The training sequence symbols of the sub-transmission unit can be redesigned, i.e., different from the training sequence symbols of the original transmission unit.

In an embodiment provided by way of example, when N is 1, the number of Y1 can be reduced to Y2. Since the total number of symbols included in the last sub-transmission unit is equal to the total number of symbols included in one transmission unit, in the embodiment of the present invention, the saved symbols can serve two purposes: A padding symbol is added to the sending unit, the padding symbol may be zero, a random symbol or a repetition of a valid information symbol, the purpose of adding the padding symbol is to form a protection at the edge of the transmitting band, and the second is to increase the length of the CP to the sub-transmitting unit, The length of the CP in the sub-transmission unit is made longer than the length of the CP in one transmission unit, which can further reduce multipath interference and reduce the peak to average power ratio (PAPR).

The principle of reducing the training sequence of Y1 symbols to Y2 training sequence symbols may be such that the performance loss of the overall receiver channel estimation is less than an acceptable range, for example, 0.2 dB.

According to the method in this embodiment, in the case of the same transmission bandwidth resource, the sum of the number of valid information symbols and the number of training sequence symbols in the sending unit corresponds to the number of subcarriers, and the number also corresponds to the size of the transmission time interval. The sending unit supports a smaller transmission time interval, reduces the number of valid information symbols and training sequence symbols, and thus can increase the width of the subcarrier accordingly, thereby improving the defect that the PCE scheme is sensitive to frequency errors, and enhancing the PCE scheme. Great. The peak-to-average power ratio (PAPR: Peak to Average Power Ra t io ) of the simultaneously transmitted signal is also reduced.

In an embodiment provided by way of example in the present invention, the XI valid information symbols to be transmitted are sequentially divided into N sub-transmission units, but since the N sub-transmission units are temporally adjacent, It can be considered that the channel of the N sub-transmission units does not change much, and the channel estimation information of the previous sub-transmission unit can be used for the channel information of the latter sub-transmission unit, therefore, All of the Y2 training sequence symbols may be placed in one of the N sub-transmission units. For example, all of the Y2 training sequence symbols may be placed in one of the N sub-transmission units and closer to the middle. Of course, it can also be placed in several sub-transmission units of the N sub-transmission units. For example, when N is 3, it can be placed in two of the sub-transmission units. 220. Perform symbol mapping operations, discrete Fourier transform operations, and add cyclic prefix operations on each of the N sub-transmission units.

Since the high-order modulation can reduce the number of valid information symbols occupied by the same valid information bits, the number of valid information symbols in each sub-transmission unit varies according to the manner of symbol mapping, so as to simplify the description below. It is specifically stated that the symbol mapping manner of the N sub-transmission units remains the same as the symbol mapping manner of one transmission unit. Change operation.

The so-called cyclic prefix is to move the signal at the end of the inverse discrete Fourier transform to the front end of the transmitting unit as prefix information, which is used to eliminate inter-symbol interference caused by multipath and the case where subcarriers cannot be kept orthogonal to each other. Inter-carrier interference. Both add Z2 cyclic prefix symbols. The original transmission unit cyclic prefix has a length of Z1 symbols.

In an embodiment provided by the present invention, the XI effective information symbols and the Y2 training sequence symbols are sequentially divided into N sub-transmission units, Y2 is smaller than Y1, and the length of the GP is unchanged. In this case, in order to ensure that the total number of symbols of one sub-transmission unit is the same as the number of symbols of one transmission unit, the following relationship needs to be satisfied, Υ2+Ν*Ζ2=Υ1+Ζ1, Ν≥2. If N=2, Xl=116, Yl=26, and Zl=6 are exemplified, as shown in FIG. 5, the existing one transmission unit is divided into two sub-transmission units by using a configuration in which Ζ2 is equal to Z1 is 6. Each sub-transmission unit has 58 valid information symbols, 10 training sequence symbols, and 6 symbol number CP information, so that the transmission time used by the two sub-transmission units is equal.

In another embodiment of the present invention provided by way of example, N=2, Xl=116, Yl=26 and Z1=Z2=6 are exemplified, as shown in FIG. 6a, because, first Sender unit and The channel of the second sub-transmission unit does not change much, and the 26 training sequence symbols can be appropriately reduced, so that the number of training sequence symbols can be reduced to 20, and the training sequence is all sent to the first sub-transmission unit. The transmission time of the first sub-transmission unit may be different from the transmission time of the second sub-transmission unit, but the sum of the transmission times of the first sub-transmission unit and the second sub-transmission unit is equal to the transmission time of one transmission unit, That is, equal to T, the total number of symbols transmitted by the two sub-transmission units is also equal to the number of symbols of one transmission unit. At the same time, with the method in this embodiment, the purpose of further reducing the training sequence symbols can be achieved, that is, Υ2 can be further reduced, and the saved symbols can be used to add a padding symbol to provide a protection function for the edge of the transmission band.

In still another embodiment of the present invention, N=2, Xl=116, Yl=26, and Zl=6 are also exemplified, and the size of Υ2 is further reduced, such as Υ2=16, in order to ensure the total number of sub-transmitting units. The number of symbols is the same as the number of symbols in a transmitting unit. The following relationship must be satisfied. Υ2+Ν*Ζ2=Υ1+Ζ1, Ζ2=8 can be derived, that is, the length of the cyclic prefix of the sub-transmission unit is greater than the cyclic prefix of one transmitting unit. length. The increased CP can further reduce inter-symbol interference or / and inter-carrier interference, while the peak-to-average power ratio (PAPR: Peak to Average Power Ra io) of the transmitted signal is also reduced.

As shown in FIG. 6b, in another embodiment provided by the exemplary method, the training sequence is sent to the first sub-transmission unit, and the first sub-transmission unit and the second sub-transmission unit are sent. The time is equal.

230. Add P guard time interval symbols to the back end of the last sub-transmission unit of the N sub-transmission units.

In order to have a time interval for the signal amplitude to be gradually increased or decreased, it is also necessary to add the guard time GP to the back end of the last sub-transmission unit of the N sub-transmission units. The present invention does not involve modification of the GP length, so the length of the GP takes a fixed value. If the sub-transmission unit division mode shown in Figs. 5 and 6b is taken as an example, after 250 processing, the two sub-transmission units can be as shown in Fig. 7a or 7b.

250. Send information after pulse shaping of each of the N sub-transmission units. The total number of all symbols in the N sub-transmission units sent out is equal to the number of all symbols in one transmission unit whose transmission time is T, that is, X 1 +Y1 +Z 1 +P.

In this embodiment, X 1 valid information symbols in one transmitting unit with a transmission time T may be divided into N sub-transmission units, and the number of valid information symbols and the number of training sequence symbols in each sub-transmission unit are determined. The transmission interval can be narrowed to increase the subcarrier width, thereby improving the defect that the PCE technology is sensitive to frequency errors, enhancing the robustness, and improving the processing performance of the PEC scheme. For example, for the sub-transmission unit division mode shown in FIG. 5, the sub-carrier distribution is as shown in FIG. 8, and the sub-carrier distribution with respect to one transmission unit is as shown in FIG. 2, and the sub-carrier width is widened by the original 1. 9 kHz. It is 4kHZ.

As shown in FIG. 9, an embodiment of the present invention, by way of example, shows a device 900 that can perform all of the functions of the method embodiments for transmitting data described above. The apparatus 900 can 900 can include one or more processors that can implement all of the functions of the above-described method embodiments. For example, the apparatus 900 may include an allocating unit 910, a mapping unit 920, an inverse discrete Fourier transform unit 930, a cyclic prefix processing unit 940, a guard time processing unit 950, a transmit pulse shaping unit 960, and a transmitting unit 970.

The allocating unit 910 is configured to allocate XI pieces of valid information symbols in one transmitting unit with a transmission time T to N sub-transmission units, and insert training sequence symbols in the respective sub-transmission units, where the effective information symbols in the N sub-transmission units The sum of the number of the training units is less than or equal to XI, and the sum Y2 of the number of training sequences in the N sub-transmission units is smaller than the number Y1 of the training sequences in the one transmitting unit, and the number of each sub-transmission unit is An integer greater than or equal to 1 less than or equal to Ν. Symbol mapping. The inverse discrete Fourier transform unit 930 is configured to perform inverse discrete Fourier transform on the symbols in each of the sub-transmission units.

The cyclic prefix processing unit 940 is configured to add a cyclic prefix symbol to the front end of each of the sub-transmission units. The guard time processing unit 950 is configured to add the guard time interval symbols to the back end of the last child sending unit of the one of the sub-transmission units. The transmission pulse shaping unit 960 is configured to pulse-form the information of one of the sub-transmission units of the N sub-transmission units, and the total transmission time T of the N sub-transmission units.

The sending unit with the sending time being Τ includes XI valid information symbols, Y1 training sequence symbols, Z1 cyclic prefix symbols, and one guard time symbol, and the total number of symbols included in the one sub-sending unit It is equal to the total number of symbols included in the one transmitting unit, and the XI, Y1, Z1, Ρ, Υ2, and Ν are integers.

In another embodiment of the present invention, the allocating unit 910 is further configured to: allocate the 训练2 training sequences to all one of the one of the sub-transmission units; and set the X to be valid The information symbols are assigned to the sub-sending units.

In still another embodiment of the present invention, the allocating unit 910 is further configured to: divide the 训练2 training sequences into a whole one of the sub-transmission units in the middle of the sub-transmission units.

In a further embodiment of the present invention, the allocating unit 910 is further configured to: sequentially allocate the XI valid information symbols to be sent and the 训练2 training sequences to the one of the sub-transmission units, where Each of the sub-transmission units includes one or more training sequences.

In still another embodiment of the present invention, the allocating unit 910 is further configured to: add a padding symbol to the sub-transmission unit, so that the total number of symbols included by the one of the sub-transmission units is equal to the one of the one sending unit The total number of symbols.

One embodiment of the invention provides, by way of example, a communication system including one or more transmitters. The transmitting end can complete all the functions in the foregoing method embodiments. For details of the specific implementation of the sending end, refer to the description of the foregoing embodiment, and details are not described herein.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way. Based on such understanding, the technical solution of the present invention may be in the form of a software product in essence or in part contributing to the prior art. 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.) to perform all or part of the methods of the various embodiments of the present invention. step. The foregoing storage medium includes: a U disk, a removable 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 code. .

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention 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. The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may also be stored in a computer readable storage medium.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the present invention The scope of protection shall be determined by the scope of protection of the claims.

Claims

Rights request

A method for transmitting data, the method comprising:

Assigning XI pieces of valid information symbols in one transmitting unit with a transmission time T to N sub-transmission units and inserting training sequence symbols in each sub-transmission unit, the sum of the number of valid information symbols in the N sub-transmission units And less than or equal to XI, the sum Y2 of the number of training sequence symbols in the N sub-transmission units is smaller than the number Y1 of training sequence symbols in the one transmitting unit, and the number of each sub-transmission unit is greater than or equal to 1 An integer equal to N; an inverse transform and an increase in the cyclic prefix operation;

Adding P guard time interval symbols to the back end of the last sub-transmission unit of the N sub-transmission units; transmitting information after pulse shaping of each of the N sub-transmission units, the N sub-transmissions The total transmission time of the unit is T;

The sending unit with the sending time T includes XI valid information symbols, Y1 training sequence symbols, Z1 cyclic prefix symbols, and P guard time symbols, and the total number of symbols included in the N sub-transmission units The number is equal to the total number of symbols included in the one transmitting unit, and the XI, Y1, Z1, Ρ, Υ2, and Ν are integers.

The method according to claim 1, wherein the cyclic prefix symbols, the valid information symbols, and the training sequence symbols used by each of the sub-transmission units are equal in transmission time.

3. The method according to claim 1, wherein the XI pieces of valid information symbols in one transmitting unit whose transmission time is 分 are divided into one sub-transmission unit and the training sequence is inserted in each sub-transmission unit. Symbols include:

And all the training sequences are all part of one of the plurality of sub-transmission units;

And assigning the XI valid information symbols to be sent to the one of the sub-transmission units.

The method according to claim 3, wherein the allocating the Y2 training sequences to one of the N sending units comprises:

The Y2 training sequences are all parted into one of the N transmitting units in the middle of the sub-transmitting unit.

The method according to claim 1, wherein the XI pieces of valid information symbols in one transmitting unit with a transmission time T are divided into N sub-transmission units and the training sequence is inserted in each sub-transmission unit. Symbols include:

And dividing the XI valid information symbols to be sent and the Y2 training sequences into the N sub-transmission units, where each of the N sub-transmission units includes one or Multiple training sequence symbols.

The method according to any one of claims 1 to 5, wherein the dividing the XI pieces of valid information symbols in one transmitting unit with a transmission time T into the N sub-transmission units comprises: sending the sub-sends A padding symbol is added to the unit such that the total number of symbols included in the N sub-transmission units is equal to the total number of symbols included in the one transmitting unit.

7. The method according to claim 1, wherein in the increasing cyclic prefix operation, the length of the added cyclic prefix is longer than the length of the cyclic prefix added when a transmitting unit increases.

8. A processor, wherein the processor comprises:

An allocation unit, configured to divide XI pieces of valid information symbols in one transmitting unit with a transmission time T into N sub-transmission units, and insert training sequence symbols in each sub-transmission unit, where the effective information symbols in the N sub-transmission units The sum of the number of the training units is less than or equal to XI, and the sum Y2 of the number of training sequences in the N sub-transmission units is smaller than the number Y1 of the training sequences in the one transmitting unit, and the number of each sub-transmission unit is An integer greater than or equal to 1 less than or equal to Ν; a symbol of the number mapping; performing an inverse discrete Fourier transform; Increase the cyclic prefix symbol;

a guard time processing unit, configured to add P guard time interval symbols to the back end of the last child sending unit of the N sub-transmission units;

a sending unit, configured to send information after each of the N sub-transmission units is pulse-formed, a total transmission time T of the N sub-transmission units;

The processor according to claim 8, wherein the allocating unit is further configured to:

And assigning the XI valid information symbols to be transmitted to the one of the sub-transmission units.

The processor according to claim 9, wherein the allocating unit is further configured to:

The 训练2 training sequences are all parted into one of the sub-transmission units in the middle of the sub-transmission units.

And assigning the XI valid information symbols to be sent and the 训练2 training sequences to the one of the sub-transmission units, wherein each of the sub-transmission units includes one or Multiple training sequence symbols.

The processor according to any one of claims 8 to 11, wherein the allocating unit is further configured to: A padding symbol is added to the sub-transmission unit such that the total number of symbols included in the N sub-transmission units is equal to the total number of symbols included in the one transmission unit.

The processor according to claim 7, wherein the cyclic prefix processing unit adds a cyclic prefix length to the N sub-transmission units longer than a cyclic prefix that is added when a transmitting unit increases.

A device, characterized in that the device comprises one or more processors, the one or more processors for performing the method of any one of claims 1 to 7.