CN110768766B

CN110768766B - Method and device for determining preamble sequence baseband signal

Info

Publication number: CN110768766B
Application number: CN201810846064.1A
Authority: CN
Inventors: 邵华; 高宽栋; 黄煌; 颜矛
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2021-04-20
Anticipated expiration: 2038-07-27
Also published as: CN110768766A

Abstract

The application discloses a method for determining a preamble sequence baseband signal parameterAnd an apparatus. In the method, the terminal can inquire a preset parameter set according to the length of the leader sequence, the interval of the leader sequence subcarriers and the interval of the data subcarriers to obtain parameters for determining the baseband signals of the leader sequence

Or, the terminal may determine the total size of the guard intervals at the front and rear sides of the preamble sequence according to the parameters, then determine the size of the guard interval at the front side, and then determine the parameters according to the size of the guard interval at the front side and the interval of the data subcarriers

And the difference between the size of the front side guard interval and half of the total size of the guard intervals does not exceed a preset threshold value. Parameters determined by the method

The sizes of the front side and the rear side guard intervals are close to each other, so that the situation that one side is large and the other side is small is avoided, and the problem that the preamble sequence baseband signal and other signals on adjacent resources are easy to interfere on the side with the small guard interval is solved.

Description

Method and device for determining preamble sequence baseband signal

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a preamble sequence baseband signal.

Background

In modern communication systems, signals may be modulated from baseband to radio frequency for transmission by modulation techniques. However, with the recent spread of Digital Signal Processors (DSPs) and the increase of computing power, analysis and processing of wireless signals can be performed at baseband as well.

In a Long Term Evolution (LTE) communication system, for a random access preamble sequence, a protocol defines a baseband signal formula as shown in formula (1).

Wherein, s (t) represents a random access signal which is continuous in time; beta is a_PRACHRepresenting an amplitude scaling factor, related to the transmit power; n is a radical of_ZCIndicating the length of a random access preamble sequence; x_u,vRepresents a ZC sequence; Δ f_RAIndicating the subcarrier interval of the random access leader sequence; t is_CPRepresents the length of the cyclic prefix; k ═ Δ f/Δ f_RAThe ratio of the subcarrier interval of the data to the subcarrier interval of the random access leader sequence is expressed;

wherein

Denotes a frequency domain location of a Physical Random Access Channel (PRACH),

representing the frequency domain width of the uplink carrier;

for indicating the frequency domain position of the random access preamble sequence, e.g. if

It means that the starting position of the random access preamble sequence on the frequency domain is 7 subcarrier intervals from the zero frequency position. The protocol provides that, for different random access preamble sequence subcarrier spacings,

the values of (A) are shown in Table 1.

TABLE 1

In a New Radio (NR) communication system, a protocol defines a baseband signal formula as shown in formula (2) for a random access preamble sequence.

Wherein the content of the first and second substances,

a random access signal representing a time succession; l is_RAIndicates the sequence length;

representing a sequence signal;

represents the length of the cyclic prefix;

represents a time domain starting position of the PRACH; Δ f_RAIndicating the subcarrier interval of the random access leader sequence; k ═ Δ f/Δ f_RAThe ratio of the subcarrier interval of the data to the subcarrier interval of the random access leader sequence is expressed; k is a radical of₁Correlating with the frequency domain starting position of the random access leader sequence;

for indicating the frequency domain location of the random access preamble sequence.

Since the length of the random access preamble sequence, the preamble sequence subcarrier spacing and the data subcarrier spacing in NR are more diverse and flexible, the method for determining the parameters for the frequency domain position of the random access preamble sequence in LTE cannot be used in NR. How to determine the NR parameters

The problem to be solved is to be solved.

Disclosure of Invention

The application provides a method and equipment for determining a preamble sequence baseband signal parameter, which are used for determining the preamble sequence baseband signal parameter and enabling a front guard interval and a rear guard interval of a preamble sequence to be approximately equal.

In a first aspect, the present application provides a preamble sequence baseband signal parameter determining method, including:

the terminal inquires a preset parameter set according to the length of the leader sequence, the subcarrier interval of the leader sequence and the interval of the data subcarriers to obtain parameters for determining the baseband signal of the leader sequence

The parameter sets include one or more of:

the length of the leader sequence is 839, the subcarrier spacing of the leader sequence is 2.5KHz, the data subcarrier spacing is 15KHz, and the parameters

Is 10;

the length of the leader sequence is 839, the subcarrier spacing of the leader sequence is 2.5KHz, the data subcarrier spacing is 30KHz, and the parameters

Is 7;

the length of the leader sequence is 839, the subcarrier spacing of the leader sequence is 2.5KHz, the data subcarrier spacing is 60KHz, and the parameters

Is 1;

the length of the leader sequence is 839, the interval of the leader sequence subcarrier is 3.75KHz, the interval of the data subcarrier is 15KHz, and the parameters

Is 11;

the length of the leader sequence is 839, the interval of the leader sequence subcarriers is 3.75KHz, the interval of the data subcarriers is 30KHz, and the parameters

Is 9;

the length of the leader sequence is 839, the interval of the leader sequence subcarrier is 3.75KHz, the interval of the data subcarrier is 60KHz, and the parameters

Is 53;

the length of the leader sequence is 839, the interval of the leader sequence subcarrier is 2.5KHz, the interval of the data subcarrier is 15KHz, and the parameters

Is 9;

the length of the leader sequence is 839, the interval of the leader sequence subcarrier is 2.5KHz, the interval of the data subcarrier is 30KHz, and the parameters

Is 6;

the length of the leader sequence is 839, the interval of the leader sequence subcarrier is 2.5KHz, the interval of the data subcarrier is 60KHz, and the parameters

Is 0;

Is 10;

Is 8;

Is 52;

the length of the leader sequence is 139, the interval of the leader sequence subcarriers is 60KHz, the interval of the data subcarriers is 240KHz, and the parameters

Is 1;

the length of the leader sequence is 139, the interval of the leader sequence subcarriers is 60KHz, the interval of the data subcarriers is 480KHz, and the parameters

Is 23;

the length of the leader sequence is 139, the interval of the leader sequence subcarriers is 120KHz, the interval of the data subcarriers is 240KHz, and the parameters

Is 2;

the length of the leader sequence is 139, the interval of the leader sequence subcarriers is 120KHz, the interval of the data subcarriers is 480KHz, and the parameters

Is 1;

Is 0;

Is 22;

Is 1;

Is 0.

In the method, the terminal can quickly acquire the parameters from the preset parameter set according to the length of the leader sequence, the subcarrier interval of the leader sequence and the data subcarrier interval

The parameter set can be suitable for the scene of flexibly configuring resources and is based on the parameters in the parameter set

The determined preamble sequence baseband signal has the front side guard interval close to the rear side guard interval, which is helpful for avoiding the situation that one of the front guard interval and the rear guard interval is larger and the other one is smaller, thereby avoiding the problem that the preamble sequence baseband signal and other signals on adjacent resources are easy to generate interference on the side with the smaller guard interval.

In a possible implementation manner, one or more of the length of the preamble sequence, the subcarrier interval of the preamble sequence, and the interval of the data subcarrier is sent to the terminal by the network device. The network device may send all the parameters to the terminal, or send some of the parameters; for parameters not indicated by the network device, the terminal may adopt default values.

In one possible implementation, the parameters are determined at the terminal

Afterwards, the method further comprises: terminal according to parameters

Determining a baseband signal of the preamble sequence, and transmitting the baseband signal to the terminalThe network device, or sends the signal modulated by the baseband signal to the network device.

In a second aspect, the present application provides a preamble sequence baseband signal parameter determining method, including:

the terminal determines the total size of the guard intervals at the front side and the rear side of the leader sequence according to one or more of the length of the leader sequence, the subcarrier interval of the leader sequence and the interval of the data subcarriers; the terminal determines the size of a front side guard interval (or determines the size of a rear side guard interval) allocated to the leader sequence according to the total size of the guard intervals, and the size of the allocated front side guard interval (or the size of the rear side guard interval) is approximately equal to half of the total size of the guard intervals; the terminal determines parameters according to the determined size of the front side guard interval (or the size of the rear side guard interval) and the interval of the data subcarriers

The parameter

A baseband signal for determining the preamble sequence.

In the method, the terminal can determine the parameters according to the length of the leader sequence, the subcarrier interval of the leader sequence and the interval of the data subcarriers

So that the determined parameters can be applied to the scene of flexibly configuring resources and the determined parameters are

In the process, the sizes of the front guard interval and the rear guard interval of the preamble sequence baseband signal are ensured to be relatively close, which is beneficial to avoiding the situation that one of the front guard interval and the rear guard interval is larger and the other one is smaller, thereby avoiding the problem that the preamble sequence baseband signal and other signals on adjacent resources are easy to generate interference on the side with the smaller guard interval.

In a possible implementation manner, when determining the size of the front side guard interval of the preamble sequence, the terminal may divide the total size of the front side and the rear side guard intervals by 2 and obtain an integer value, which is used as the size of the front side guard interval of the preamble sequence baseband signal. Alternatively, the total size of the front and rear guard intervals may be added to the size of the preamble sequence subcarrier interval, and then divided by 2 and rounded to obtain a value, which is used as the size of the front guard interval of the preamble sequence baseband signal. Optionally, rounding may not be performed in the above process. Accordingly, the terminal may also determine the rear guard interval size of the preamble sequence baseband signal according to the above-described manner. The mode simply and conveniently realizes that the front side guard interval is approximately equal to the rear side guard interval.

In one possible implementation manner, the terminal determines the parameter according to the size of the front side guard interval and the data subcarrier interval

In this case, the value obtained by subtracting half of the data subcarrier spacing from the size of the front guard interval and rounding may be used as the parameter

In addition, the terminal can also determine parameters according to the size of the rear side guard interval and the data subcarrier interval

Specifically, the terminal may subtract the total size of the guard interval, sum the size of the back-side guard interval and half of the data subcarrier interval, and use the obtained value as a parameter

Of course, the above-mentioned determination parameters

May not be rounded. In the method provided by the application, the front side guard interval and the back side guard intervalApproximately equal, therefore, the front side guard interval may also be replaced by the back side guard interval in the above implementation.

Alternatively, the unit of the guard interval may be an absolute unit of frequency, such as hertz (Hz), and the determined parameter is then used

Also in Hz. Due to the parameters

Usually in the number of preamble sequence subcarriers, it is also possible to further convert it into the number of preamble sequence subcarriers, i.e. to divide the determined value by the preamble sequence subcarrier spacing (in Hz). Alternatively, the unit of the guard interval may be the number of preamble sequence subcarriers, that is, the guard interval is determined by dividing the value in Hz by the preamble sequence subcarrier interval (in Hz). The size of the data subcarrier spacing may also be used for the preamble sequence subcarrier number representation.

In one possible implementation, the parameters are determined at the terminal

Afterwards, the method further comprises: terminal according to parameters

And determining a baseband signal of the preamble sequence, and sending the baseband signal to the network equipment by the terminal or sending a signal obtained by modulating the baseband signal to the network equipment.

In a third aspect, the present application also provides a preamble sequence baseband signal parameter determining apparatus, which includes a searching unit and a determining unit, and further may further include a receiving unit and a transmitting unit, and is configured to implement the method according to any one of the first aspect.

In a fourth aspect, the present application further provides a preamble sequence baseband signal parameter determination apparatus, which includes a first determination unit, a second determination unit, a third determination unit, and further may further include a receiving unit and a transmitting unit, and is configured to implement the method according to any one of the second aspects.

In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor and a memory, and further may further include a communication interface, where the memory is used to store a program, and the processor calls the program stored in the memory to execute the method according to any one of the first aspect through the communication interface.

In a sixth aspect, an embodiment of the present application provides a communication device, which includes a processor, a memory, and further, a communication interface, where the memory is used for storing a program, and the processor calls the program stored in the memory to execute the method according to any one of the second aspects through the communication interface.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores computer instructions, and when the instructions are executed on a computer, the instructions cause the computer to perform the method of any one of the first and second aspects.

Drawings

FIG. 1 is a table showing parameters provided in an embodiment of the present application

A schematic diagram of (a);

fig. 2 is a schematic flowchart of a preamble sequence baseband signal parameter determining method according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a preamble sequence baseband signal parameter determining apparatus according to an embodiment of the present application;

fig. 4 is a second schematic structural diagram of a preamble sequence baseband signal parameter determining apparatus according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail with reference to the accompanying drawings.

In the random access process, the terminal needs to send a random access preamble to the network device, and the random access preamble may be obtained by modulating a baseband signal of the random access preamble sequence. In the present application, the random access preamble sequence may also be referred to as a preamble or a preamble sequence.

In NR, the protocol defines a random access preamble sequence baseband signal as shown in equation (2). When the terminal is in the preamble sequence baseband signal, the parameters need to be determined first

The preamble sequence baseband signal is then determined according to equation (2).

Specifically, assuming that the length of the preamble sequence is L, the preamble sequence baseband signal occupies L preamble sequence subcarriers, and assuming that the preamble sequence subcarrier interval is Δ f_RAThe bandwidth required by the preamble sequence baseband signal is L × Δ f_RA. However, the data subcarrier spacing on the Physical Uplink Shared Channel (PUSCH) is Δ f, and each Resource Block (RB) includes N_scSub-carriers, then the bandwidth of one RB is Δ f N_sc. Therefore, the number of RBs occupied by the pilot sequence baseband signal is

Wherein the symbols

Indicating rounding up.

For example, if a preamble sequence length L is 839, the preamble sequence subcarrier spacing Δ f_RA1.25KHz, the required bandwidth of the preamble sequence baseband signal is L x delta f_RA839 × 1.25 × 1048.75 KHz; PUSCH data subcarrier spacing Δ f ═ 15KHz, N_scIs usually 12, then the preamble sequence baseband signal occupies the number of RBs

And the total bandwidth occupied by 6 RBs is N_RB*(Δf*N_sc) As can be seen from the difference between the bandwidth occupied by the preamble sequence baseband signal and the required bandwidth is 1080-1048.75 ═ 31.25KHz, which corresponds to the bandwidth of 25 preamble sequence subcarriers.

The bandwidth of the redundant 25 leading sequence sub-carriers can be used as a guard interval and distributed on two sides of the leading sequence baseband signal, so that the interference between the leading sequence baseband signal and the signal on the adjacent resource can be avoided. As shown in fig. 1, GP1 denotes a guard interval distributed on the front side of the preamble sequence baseband signal, and GP2 denotes a guard interval distributed on the rear side of the preamble sequence baseband signal.

As shown in FIG. 1, parameters

May represent the difference between the center frequency point of the preamble sequence baseband signal and the center frequency position of the first PUSCH data subcarrier. For example, if the parameters

A value of 7 indicates that there is a difference of 7 preamble sequence subcarriers between the preamble sequence baseband signal and the middle frequency position of the first PUSCH data subcarrier.

As mentioned above, parameters

Is related to the parameters of the length of the preamble sequence, the subcarrier spacing of the preamble sequence and the data subcarrier spacing. The resource allocation in NR is flexible and various, for example, the length of the preamble sequence, the subcarrier spacing of the preamble sequence, the data subcarrier spacing, and each parameter can have various valuesAnd (6) selecting. How to determine parameters under the scene of flexible and changeable resource configuration

The value of (a) becomes a problem to be solved urgently.

In order to solve the above problems, practitioners have proposed to determine parameters from the parameter sets shown in table 2

The method of (1).

TABLE 2

The terminal can search corresponding parameters in table 2 according to the preamble sequence length, the preamble sequence subcarrier interval and the PUSCH data subcarrier interval

However, the terminal determines the parameters according to table 2 above

And after the preamble sequence baseband signal is further determined, the difference between the front side guard interval and the rear side guard interval of the determined preamble sequence baseband signal is larger.

Taking the first row of values in table 2 as an example, the preamble sequence length L is 839, and the preamble sequence subcarrier spacing Δ f_RA1.25KHz, the PUSCH data subcarrier spacing Δ f is 15KHz, then the preamble sequence baseband signal will occupy 6 RBs, and the difference between the bandwidth occupied by the preamble sequence baseband signal and the required bandwidth is 1080-1048.75 which is 31.25KHz, which is equivalent to the bandwidth of 25 preamble sequence subcarriers. Parameter(s)

Therefore, the difference between the pilot sequence baseband signal and the middle frequency position of the first PUSCH data subcarrier is 12 pilot sequence subcarriers. In addition, as shown in fig. 1, the bandwidth ratio parameter of the front side guard interval GP1

The indicated bandwidth is large, with a difference of half the PUSCH data subcarrier spacing, i.e. Δ f/2 ═ 7.5KHz, corresponding to the bandwidth of 6 preamble sequence subcarriers. Thus, the front side guard interval GP1 comprises a bandwidth of 6+ 12-18 preamble sequence sub-carriers. However, the total bandwidth of the front side guard interval GP1 and the back side guard interval GP2 is 25 preamble sequence subcarriers, and then the bandwidth of the back side guard interval GP2 is 7 preamble sequence subcarriers. The difference between the front side guard interval GP1 and the rear side guard interval GP2 is larger, and the distribution is uneven.

The parameters provided in the other rows of table 2 also have the above-mentioned problems, which are not illustrated here. Thus, the parameters determined according to Table 2

The difference between the front side guard interval and the rear side guard interval is increased, which is not beneficial to distinguishing from other signals on adjacent resources.

In order to realize the determination of parameters under the scene of flexible and changeable resource configuration

And the front side guard interval is equal to or close to the rear side guard interval, the embodiment of the present application provides a method for determining a preamble sequence baseband signal parameter, which can be applied to NR or other future communication systems. In particular, the method can be applied to a terminal and can also be applied to network equipment. The method may comprise the steps as shown in fig. 2:

step 201, the terminal determines the total size of the guard interval at the front side and the rear side of the leader sequence according to one or more of the length of the leader sequence, the subcarrier interval of the leader sequence and the data subcarrier interval.

The data subcarrier spacing may be a PUSCH data subcarrier spacing, a Physical Uplink Shared Channel (PUSCH) subcarrier spacing, a Physical Uplink Control Channel (PUCCH) subcarrier spacing, a Physical Downlink Control Channel (PDCCH) subcarrier spacing, a Physical Downlink Shared Channel (PDSCH) subcarrier spacing, a subcarrier spacing of an uplink bandwidth part (BWP), a subcarrier spacing of a downlink BWP, a subcarrier spacing of a cell default subcarrier spacing, a subcarrier spacing of a corresponding carrier (component carrier, CC), or another data subcarrier spacing specified by a protocol.

Specifically, when determining the total size of the guard intervals on the front and rear sides of the preamble sequence, the terminal may first determine that the preamble sequence baseband signal needs to occupy the bandwidth, determine the number of RBs occupied according to the bandwidth needed to be occupied, and then determine the difference between the total bandwidth of the RBs occupied and the bandwidth needed to be occupied, that is, the total size of the guard intervals on the front and rear sides. For example, the preamble sequence has a length L and a subcarrier spacing Δ f_RAThe bandwidth required by the preamble sequence baseband signal is L × Δ f_RA(ii) a Then determining the number of occupied RBs

Where Δ f denotes the data subcarrier spacing, N_scIndicates the number of subcarriers, N, contained in each RB_scUsually constant, sign

Represents rounding up; finally, the total size GP of the front side and the rear side of the guard interval is determined as N_RB*(Δf*N_sc)-L*Δf_RA。

The unit of the total size GP of the guard interval is KHz calculated by the above formula. Due to the allocation of the front side guard interval, the back side guard interval and the parameters

Usually in the form of a preambleThe number of sequence sub-carriers is unit, so the determined GP (khz) can be further converted into GP' (number of preamble sequence sub-carriers). For example, if GP is 62.5KHz, Δ f_RA2.5KHz, then GP' ═ GP/Δ f_RA62.5/2.5-25 preamble sequence subcarriers.

Optionally, the length of the preamble sequence, the preamble sequence subcarrier interval, and the data subcarrier interval may be sent to the terminal by the network device. For example, the network device may carry information indicating the above parameters in a System Information Block (SIB).

Of course, one or more of the above parameters may also be indicated without the network device. For example, a default value of the data subcarrier spacing is preset in the protocol, and if the network device does not indicate the size of the data subcarrier spacing, the terminal determines to adopt the default value of the data subcarrier spacing.

Step 202, the terminal determines the size of the front side guard interval according to the total size of the front and rear side guard intervals, and the difference between the determined size of the front side guard interval and half of the total size of the front and rear side guard intervals does not exceed a preset threshold.

In order to avoid interference between the preamble sequence baseband signal and other signals on the adjacent resources, the total size of the guard intervals may be distributed more uniformly to the guard intervals on both sides, and if the guard interval on one side is too large and the guard interval on the other side is too small, the too small side is likely to interfere with the signals on the adjacent resources. Therefore, in the process of determining the front side guard interval, the difference between the front side guard interval and half of the total size of the guard interval is limited, and the limitation does not exceed the preset threshold, which is beneficial to realizing that the difference between the front side guard interval and the rear side guard interval is not too large.

As described above, the total size of the guard interval determined in step 201 may be represented by the number of preamble sequence subcarriers, in this case, in order to achieve more even allocation of the front guard interval and the rear guard interval, the total size of the guard interval may be divided by 2 and rounded to obtain a value as the size of the front guard interval, for example, if the total size of the guard interval GP' is 24, the front guard interval GP1 is 24/2 is 12 preamble sequence subcarriers. Alternatively, the total size of the guard interval may be increased by 1, and then divided by 2 and rounded to obtain a value as the size of the front side guard interval, for example, if the total size of the guard interval GP' is 17, then the front side guard interval GP1 is (17+1)/2 is 9 preamble sequence subcarriers. Alternatively, the total size of the guard interval may be added to the size of one preamble sequence subcarrier interval, and then the value obtained by dividing by 2 and rounding is used as the size of the front side guard interval, for example, if GP is 62.5KHz and the preamble sequence subcarrier interval is 2.5KHz, GP1 is (62.5+2.5)/2 is 32.5KHz and 13 preamble sequence subcarriers.

However, the total guard interval size GP' is not necessarily an even number, and if the guard interval size is expressed by the number of preamble sequence subcarriers, rounding operation is often required. In the embodiment of the present application, rounding-up and sign-up may be adopted

Indicating that rounding-down, symbolizing

And (4) showing. For example, if the total size GP' of the guard interval is 25 and rounding up is used, the front guard interval

A corresponding back side guard interval GP 2-25-13-12 preamble sequence subcarriers. For example, if the total guard interval size GP' is 25 and the rounding-down scheme is adopted, the front guard interval

And each preamble sequence subcarrier corresponds to a back side guard interval GP 2-25-12-13 preamble sequence subcarriers. Of course, the rounding operation may not be performed.

It should be understood that the total size of the guard interval is divided into two parts, namely a front side guard interval and a rear side guard interval, and in the case that the total size of the guard interval is determined, the size of one can be determined to determine the size of the other. Therefore, in the above step, the front side guard interval may also be replaced by the rear side guard interval, that is, the size of the rear side guard interval is determined according to the total size of the front and rear side guard intervals, and the difference between the determined size of the rear side guard interval and half of the total size of the front and rear side guard intervals does not exceed the preset threshold.

Step 203, the terminal determines the parameters according to the determined size of the front side guard interval and the data subcarrier interval

The parameter

A baseband signal for determining a preamble sequence.

As shown in FIG. 1, the bandwidth ratio parameter of the front side guard interval GP1

The indicated bandwidth is large, with the difference being half the data subcarrier spacing. Since the guard interval is usually expressed by the number of preamble sequence subcarriers, half of the data subcarriers may be expressed by the number of preamble sequence subcarriers, that is, half of the data subcarriers is Δ f/(2 × Δ f)_RA) A preamble sequence subcarrier.

The terminal may use the value obtained by subtracting half of the data subcarrier spacing from the front side guard interval GP1 determined in step 202 and rounding it as a parameter

The value of (c). For example, if the front side guard interval GP1 is determined to be 13, the data subcarrier Δ f is 15KHz, and the preamble sequence subcarrier spacing Δ f is determined to be 13 in step 202_RA2.5KHz, if rounding up is used, then the parameter is

Of course, it is also possible to useThe rounding may be performed in a downward rounding manner, or a rounding operation may not be performed, which is not limited in this embodiment of the application.

As described above, if the terminal determines the size of the back side guard interval first, the terminal may also determine the parameter according to the determined size of the back side guard interval and the data subcarrier interval

Specifically, the terminal may subtract the total size of the guard interval, sum the guard interval at the rear side and the interval of the one-half data subcarrier, and use the obtained value as the parameter

Further, after the terminal performs step 203, the terminal may further determine parameters according to the determined parameters

Further determining the preamble sequence baseband signal, see formula (2). The terminal sends the determined preamble sequence baseband signal to the network equipment; or modulating the preamble sequence baseband signal and sending the modulated signal to the network equipment.

The above-mentioned determined parameters

The method can be suitable for the scene of flexibly configuring the resources and determines the parameters

In the process, the sizes of the front guard interval and the rear guard interval of the preamble sequence baseband signal are ensured to be relatively close, which is helpful for avoiding the situation that one of the front guard interval and the rear guard interval is larger and the other one is smaller, thereby avoiding the problem that the preamble sequence baseband signal and other signals on adjacent resources are easy to generate interference on the side with the smaller guard interval.

In order to solve the above technical problem, embodiments of the present application further provideProvides a method for determining the parameters of the baseband signals of the preamble sequence to realize the rapid determination of the parameters

The method may also be applied in NR or other future communication systems.

In the method, the terminal can inquire a preset parameter set according to the length of the leader sequence, the subcarrier interval of the leader sequence and the interval of the data subcarriers to obtain parameters for determining the baseband signal of the leader sequence

In particular, the set of preset parameters may comprise one or more of:

Is 10;

Is 7;

Is 1;

Is 11;

Is 9;

Is 53;

Is 9;

Is 6;

Is 0;

Is 10;

Is 8;

Is 52;

Is 1;

Is 23;

Is 2;

Is 1;

Is 0;

Is 22;

Is 1;

Is 0.

In the above embodiment, the parameters

In units of number of subcarriers of the previous sequence. Of course, the above parameters may be used

Converted to a value in Hz or KHz.

To illustrate more clearly the parameters determined by the terminal according to the parameter set

The front side guard interval and the back side guard interval can be made to be relatively close in size, and two options from the parameter set options are selected for illustration.

1) The length of the leader sequence is 839, the subcarrier spacing of the leader sequence is 2.5KHz, the data subcarrier spacing is 30KHz, and the parameters

Is 7.

Wherein, the length L of the leader sequence is 839, and the subcarrier interval of the leader sequence is delta f_RA2.5KHz, the required bandwidth of the preamble sequence baseband signal is L x delta f_RA839 × 2.5 × 2097.5 KHz. Data subcarrier spacing Δ f-30 KHz, N_scIs usually 12, then the preamble sequence baseband signal occupies the number of RBs

And the total bandwidth occupied by 6 RBs is N_RB*(Δf*N_sc) As can be seen from the difference between the bandwidth occupied by the preamble sequence baseband signal and the required bandwidth, i.e., the total size of the front and rear guard intervals GP 2160-2097.5 equals to 62.5KHz, then GP equals to 62.5/2.5 equals to the bandwidth of 25 preamble sequence subcarriers.

Parameter(s)

I.e. the difference between the pilot sequence baseband signal and the middle frequency position of the first data subcarrier is 7 pilot sequence subcarriers. And a front side guard interval GP1 and parameters

Differing by half the data subcarrier spacing, i.e.

And one preamble sequence subcarrier, wherein GP2 is GP' -GP1 is 25-13 is 12 preamble sequence subcarriers. It can be seen that according to this parameter

And the determined front side guard interval and the determined rear side guard interval of the preamble sequence baseband signal are relatively close.

2) The length of the leader sequence is 139, the interval of the leader sequence subcarriers is 60KHz, the interval of the data subcarriers is 480KHz, and the parameters

Is 23.

The length L of the leader sequence is 139, and the subcarrier interval of the leader sequence is delta f_RA60KHz, the required bandwidth of the preamble sequence baseband signal is L x delta f_RA139 × 60 ═ 8340 KHz. Data subcarrier spacing Δ f 480KHz, N_scIs usually 12, then the preamble sequence baseband signal occupies the number of RBs

And 2 RBs occupy a total bandwidth of N_RB*(Δf*N_sc) As can be seen from the difference between the bandwidth occupied by the preamble sequence baseband signal and the required bandwidth, that is, the total size of the front and rear guard intervals GP 11520 and 8340 is 3180KHz, and GP 3180/60 is the bandwidth of 53 preamble sequence subcarriers.

Parameter(s)

I.e. the difference between the pilot sequence baseband signal and the middle frequency position of the first data subcarrier is 23 pilot sequence subcarriers. And a front side guard interval GP1 and parameters

Differing by half the data subcarrier spacing, i.e.

And a preamble sequence subcarrier, wherein GP2 is GP' -GP1 is 53-27 is 26 preamble sequence subcarriers. It can be seen that according to this parameter

Similar to the previous method, the data subcarrier spacing in this method may be a PUSCH data subcarrier spacing, or other data subcarrier spacing specified by the protocol.

One or more of the length of the preamble sequence, the subcarrier interval of the preamble sequence and the interval of the data subcarrier are sent to the terminal by the network device. For example, the network device may carry the above parameter information in the SIB. The network device can send all the parameter information to the terminal, and can also send part of the parameter information; for parameters that are not indicated by the network device, the terminal may adopt preset default values.

At one kind canIn an implementation manner, if one or more parameters of the length of the preamble sequence, the subcarrier spacing of the preamble sequence, and the data subcarrier spacing are configured in advance, the parameter may be omitted from the parameter set. For example, if the length of the preamble sequence is preconfigured or semi-statically set to 839, the parameter set searched by the terminal may no longer include the length of the preamble sequence, and the terminal searches for the corresponding parameter only according to the subcarrier interval of the preamble sequence and the data subcarrier interval

And (4) finishing.

Further, parameters are determined at the terminal

Afterwards, the method further comprises: terminal according to parameters

Based on the principle of the method, the embodiment of the present application further provides parameter set options as shown in table 3 to cope with more resource allocation scenarios. Note that, although items such as the number of occupied RBs, the total size of the guard interval, the front guard interval, and the rear guard interval are shown in table 3, the items are not necessary items in the parameter set for the purpose of facilitating understanding.

TABLE 3

In the method, the terminal can determine the length of the preamble sequence and the sub-carrier of the preamble sequenceWave interval, data subcarrier interval, and rapid acquisition of parameters from a preset parameter set

Based on the same technical concept, the embodiment of the present application further provides a preamble sequence baseband signal parameter determining apparatus, which is used for implementing the functions executed by the terminal in the foregoing method embodiment. The device may be a network device, or may be a chip or an integrated circuit installed in the network device. As shown in fig. 3, the apparatus 300 may include a searching unit 301 and a determining unit 302, and further, the apparatus 300 may further include a receiving unit 303 and a transmitting unit 304.

Specifically, the searching unit 301 is configured to query a preset parameter set according to the length of the preamble sequence, the interval of the preamble sequence subcarriers, and the interval of the data subcarriers, to obtain a parameter for determining the preamble sequence baseband signal

A determination unit 302 for determining the parameters

Determining a baseband signal of the preamble sequence.

Wherein the parameter set may comprise one or more of:

the length of the leader sequence is 839, and the subcarrier spacing of the leader sequence is 2.5KHz, data subcarrier spacing of 15KHz, parameters

Is 10;

the length of the leader sequence is 839, the interval of the leader sequence subcarriers is 2.5KHz, the interval of the data subcarriers is 30KHz, and the parameters

Is 7;

the length of the leader sequence is 839, the interval of the leader sequence subcarriers is 2.5KHz, the interval of the data subcarriers is 60KHz, and the parameters

Is 1;

Is 11;

Is 9;

Is 53;

Is 9;

the length of the leader sequence is 839, the spacing of the leader sequence subcarriers is 2.5KHz, and the spacing of the data subcarriers is 30KHzParameter of

Is 6;

Is 0;

Is 10;

Is 8;

Is 52;

Is 1;

Is 23;

Is 2;

Is 1;

Is 0;

Is 22;

Is 1;

Is 0.

In one possible implementation, the apparatus 300 may further include: a receiving unit 303, configured to receive one or more of the length of the preamble sequence, the subcarrier interval of the preamble sequence, and the interval of the data subcarrier sent by the network device.

In one possible implementation, the apparatus 300 may further include: a sending unit 304, configured to send the baseband signal to a network device, or send a signal obtained by modulating the baseband signal to the network device.

The terminals in the above-described apparatus and method embodiments fully correspond, and the corresponding steps are performed by corresponding modules or units, for example, the searching unit is configured to perform the step of searching parameter sets in the method embodiment, the determining unit is configured to perform the step of determining baseband signals in the method embodiment, the transmitting unit (transmitter) is configured to perform the step of transmitting in the method embodiment, the receiving unit (receiver) is configured to perform the step of receiving in the method embodiment, and other steps are also performed by corresponding units (the searching unit and the determining unit); the finding unit and the determining unit may be implemented by a processor, which may be one or more.

Based on the same technical concept, the embodiment of the present application further provides a preamble sequence baseband signal parameter determining apparatus, which is used for implementing the functions executed by the terminal in the foregoing method embodiment. As shown in fig. 4, the apparatus 400 may include a first determining unit 401, a second determining unit 402, a third determining unit 403, and a fourth determining unit 404, and further, the apparatus 400 may further include a receiving unit 405 and a transmitting unit 406.

Specifically, the first determining unit 401 is configured to determine the total size of guard intervals on the front side and the back side of the preamble sequence according to one or more of the length of the preamble sequence, the subcarrier interval of the preamble sequence, and the interval of the data subcarrier;

a second determining unit 402, configured to determine, according to the total size of the guard intervals, a size of a front-side or rear-side guard interval allocated to the preamble sequence, where a difference between the size of the front-side or rear-side guard interval and a half of the total size of the guard intervals does not exceed a preset threshold;

a third determining unit 403, determining parameters according to the size of the front or rear guard interval and the interval of the data sub-carriers

Said parameter

Baseband for determining the preamble sequenceA signal;

a fourth determination unit 404 for determining the parameters according to the parameters

Determining a baseband signal of the preamble sequence.

In a possible implementation manner, the second determining unit 402 is specifically configured to: dividing the total size of the guard interval by 2 to obtain a numerical value, or dividing the total size of the guard interval by 2 and rounding to obtain a numerical value, wherein the numerical value is used as the size of the front side guard interval allocated by the leader sequence; or, a numerical value obtained by adding 1 to the total size of the guard interval and then dividing by 2, or a numerical value obtained by dividing by 2 and rounding up is taken as the size of the front side guard interval allocated by the preamble sequence; or, the total size of the guard interval is added to the subcarrier interval of one preamble sequence, and then the value obtained by dividing the sum by 2, or the value obtained by dividing the sum by 2 and rounding is used as the size of the front side guard interval allocated by the preamble sequence.

In a possible implementation manner, the third determining unit 403 is specifically configured to: subtracting half of the interval of the data sub-carrier from the size of the front side guard interval and rounding to obtain a numerical value as the parameter

Or, subtracting the total size of the guard interval, and taking the sum of the size of the rear side guard interval and half of the data subcarrier interval as the parameter

In one possible implementation, the front side guard interval, the rear side guard interval, and the front and rear side guard intervals are absolute frequency units; or, the unit of the front side guard interval, the rear side guard interval and the front and rear side guard intervals is the number of preamble sequence subcarriers.

In one possible implementation, the apparatus 400 may further include: a receiving unit 405, configured to receive one or more of the length of the preamble sequence, the subcarrier interval of the preamble sequence, and the interval of the data subcarrier sent by the network device.

In one possible implementation, the apparatus 400 may further include: a sending unit 406, configured to send the baseband signal to a network device, or send a signal obtained by modulating the baseband signal to the network device.

The terminals in the above-mentioned apparatus and method embodiments completely correspond to each other, and corresponding modules or units execute corresponding steps, for example, a sending unit (transmitter) executes the steps sent in the method embodiment, a receiving unit (receiver) executes the steps received in the method embodiment, other steps are executed by respective determining units, and the functions of a plurality of determining units can also be implemented by one determining unit; the above determination units may be implemented by a processor, and the processor may be one or more.

It should be noted that the division of each unit of the above apparatus is only a division of a logic function, and when the actual implementation is implemented, all or part of the division may be integrated into one physical entity, or may be physically separated. And these units can be implemented entirely in software, invoked by a processing element; or may be implemented entirely in hardware; and part of the units can be realized in the form of calling by a processing element through software, and part of the units can be realized in the form of hardware. For example, the searching unit 301 and the determining unit 302 in the apparatus 300 may be independently arranged, or may form a processing unit, and be implemented by a processor or a chip; the 4 determination units in the apparatus 400 may be independently arranged, or may be implemented by forming one processing unit. For another example, the transmitting unit may be a processing element separately set up, or may be implemented by being integrated into a chip of the apparatus, or may be stored in a memory of the apparatus in the form of a program, and the function of the transmitting unit may be called and executed by a processing element of the apparatus. The other units are implemented similarly. In addition, all or part of the units can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, the steps of the method or the units above may be implemented by hardware integrated logic circuits in a processor element or instructions in software. Further, the above transmission unit is a unit that controls transmission, and information can be transmitted by a transmission device such as an antenna and a radio frequency device. Similarly, the transmitting unit may also receive information via a receiving device, such as an antenna and a radio frequency device. The transmitting unit and the receiving unit may also form a transceiving unit, which may also be referred to as a transceiver, a transceiving circuit, or a transceiver, and the like, and together implement a transceiving function.

The above units may be one or more integrated circuits configured to implement the above methods, for example: one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors, or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when the above units are implemented in the form of a processing element scheduler, the processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling programs. As another example, these units may be integrated together and implemented in the form of a system-on-a-chip (SOC).

Based on the same technical concept, the embodiment of the present application further provides a communication device, which is used for implementing the functions executed by the terminal in the foregoing method embodiments. As shown in fig. 5, the communication device 500 may include a processor 501, a memory 502, a communication interface 503, and a communication bus 504.

Specifically, processor 501 may be a general purpose CPU, microprocessor, ASIC, or one or more integrated circuits configured to control the execution of programs in accordance with the teachings of the present application.

The communication bus 504 may include a path that conveys information between the aforementioned components.

The communication interface 503 may be any device, such as a transceiver, for communicating with other devices or communication networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc.

The memory 502 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that may store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via a bus. The memory may also be integral to the processor.

The memory 502 is used for storing application program codes for executing the scheme of the application, and the processor 501 controls the execution. The processor 501 is configured to execute the application program code stored in the memory 502, so as to implement the preamble sequence baseband signal parameter determination method provided by the above-mentioned embodiment of the present application.

Alternatively, in this embodiment of the present application, the processor 501 may also perform related functions in the preamble sequence baseband signal parameter determining method provided in the foregoing embodiment of the present application, and the communication interface 503 is responsible for communicating with other devices or a communication network, which is not specifically limited in this embodiment of the present application.

In particular implementations, processor 501 may include one or more CPUs, as one embodiment.

In particular implementations, the communication device may include multiple processors, as one embodiment. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In particular, processor 501 may invoke the program of memory storage 502 to perform the following steps:

inquiring a preset parameter set according to the length of the leader sequence, the interval of the subcarrier of the leader sequence and the interval of the data subcarrier to obtain parameters for determining the baseband signal of the leader sequence

According to said parameter

Determining a baseband signal of the preamble sequence;

the parameter sets include one or more of:

the length of the leader sequence is 839, the interval of the leader sequence subcarriers is 2.5KHz, the interval of the data subcarriers is 15KHz, and the parameters

Is 10;

Is 7;

Is 1;

Is 11;

Is 9;

Is 53;

Is 9;

Is 6;

Is 0;

Is 10;

Is 8;

Is 52;

Is 1;

Is 23;

Is 2;

Is 1;

Is 0;

Is 22;

Is 1;

Is 0.

In one possible implementation, the processor 501 may receive one or more of the length of the preamble sequence, the subcarrier spacing of the preamble sequence, and the data subcarrier spacing transmitted by the network device through the communication interface 503.

In a possible implementation manner, the processor 501 may send the baseband signal to a network device through the communication interface 503, or send a signal obtained by modulating the baseband signal to the network device.

Based on the same technical concept, the embodiment of the present application further provides a communication device, which has a structure similar to that shown in fig. 5, and may include a processor and a memory, and further, may further include a communication interface and a communication bus.

Specifically, the processor may invoke the memory-stored program to perform the steps of:

determining the total size of guard intervals at the front side and the rear side of the leader sequence according to one or more of the length of the leader sequence, the subcarrier interval of the leader sequence and the interval of data subcarriers;

determining the size of a front side or rear side guard interval allocated to the leader sequence according to the total size of the guard interval, wherein the difference between the size of the front side or rear side guard interval and half of the total size of the guard interval does not exceed a preset threshold;

determining parameters according to the size of the front side or the rear side guard interval and the interval of the data subcarriers

Said parameter

A baseband signal for determining the preamble sequence;

according to said parameter

Determining a baseband signal of the preamble sequence.

In one possible implementation, the processor is specifically configured to: dividing the total size of the guard interval by 2 to obtain a numerical value, or dividing the total size of the guard interval by 2 and rounding to obtain a numerical value, wherein the numerical value is used as the size of the front side guard interval allocated by the leader sequence; or, a numerical value obtained by adding 1 to the total size of the guard interval and then dividing by 2, or a numerical value obtained by dividing by 2 and rounding up is taken as the size of the front side guard interval allocated by the preamble sequence; or, the total size of the guard interval is added to the subcarrier interval of one preamble sequence, and then the value obtained by dividing the sum by 2, or the value obtained by dividing the sum by 2 and rounding is used as the size of the front side guard interval allocated by the preamble sequence.

In one possible implementation, the processor is specifically configured to: subtracting half of the interval of the data sub-carrier from the size of the front side guard interval and rounding to obtain a numerical value as the parameter

In one possible implementation, the processor is further configured to: and receiving one or more of the length of the preamble sequence, the subcarrier interval of the preamble sequence and the interval of the data subcarrier sent by the network equipment through the communication interface.

In one possible implementation, the processor is further configured to: and sending the baseband signal to network equipment through the communication interface, or sending a signal obtained by modulating the baseband signal to the network equipment.

The present application further provides a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a computer, implements the preamble sequence baseband signal parameter determining method in any of the above method embodiments.

The embodiment of the present application further provides a computer program product, and when executed by a computer, the computer program product implements the preamble sequence baseband signal parameter determination method in any of the above method embodiments.

The embodiment of the application provides a chip system, which includes a processor, and is used for supporting communication equipment to implement the method for determining the preamble sequence baseband signal parameters. In one possible design, the system-on-chip further includes a memory. The memory is used for storing program instructions and data necessary for the communication device. The chip system may be formed by a chip, and may also include a chip and other discrete devices, which is not specifically limited in this embodiment of the present application.

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for determining parameters of a preamble sequence baseband signal, comprising:

the terminal inquires a preset parameter set according to the length of the leader sequence, the interval of the leader sequence subcarriers and the interval of the data subcarriers to obtain parameters for determining the baseband signals of the leader sequence

The terminal is based on the parameters

Determining a baseband signal of the preamble sequence;

the parameter sets include one or more of:

Is 10;

Is 7;

Is 1;

Is 11;

Is 9;

Is 53;

Is 9;

Is 6;

Is 0;

Is 10;

Is 8;

Is 52;

Is 1;

Is 23;

Is 2;

Is 1;

Is 0;

Is 22;

Is 1;

Is 0.

2. The method of claim 1, further comprising:

and the terminal receives one or more of the length of the leader sequence, the subcarrier interval of the leader sequence and the interval of the data subcarriers sent by the network equipment.

3. The method of claim 1, wherein the parameters are determined at the terminal

Then, the method further comprises the following steps:

and the terminal sends the baseband signal to network equipment, or sends a signal obtained by modulating the baseband signal to the network equipment.

4. A method for determining parameters of a preamble sequence baseband signal, comprising:

the terminal determines the total size of the guard intervals at the front side and the rear side of the leader sequence according to one or more of the length of the leader sequence, the subcarrier interval of the leader sequence and the interval of the data subcarriers;

the terminal determines the size of a front side or rear side guard interval allocated to the leader sequence according to the total size of the guard interval, wherein the difference between the size of the front side or rear side guard interval and half of the total size of the guard interval does not exceed a preset threshold;

the terminal determines parameters according to the size of the front side or the rear side guard interval and the interval of the data subcarriers

Said parameter

A baseband signal for determining the preamble sequence;

the terminal is based on the parameters

Determining a baseband signal of the preamble sequence.

5. The method of claim 4, wherein the determining, by the terminal, the size of the front-side or rear-side guard interval allocated for the preamble sequence according to the total size of the guard interval comprises:

the terminal divides the total size of the guard interval by 2 to obtain a numerical value, or divides the total size of the guard interval by 2 and takes the numerical value obtained by rounding up as the size of the front side guard interval allocated by the leader sequence; alternatively, the first and second electrodes may be,

the terminal adds 1 to the total size of the guard interval, and then divides the sum by 2 to obtain a numerical value, or divides the sum by 2 and takes the numerical value obtained by rounding up as the size of the front side guard interval allocated by the leader sequence; alternatively, the first and second electrodes may be,

and the terminal adds the total size of the guard interval to the subcarrier interval of a leader sequence, and then divides the sum by 2 to obtain a numerical value, or divides the sum by 2 and takes the integral numerical value as the size of the front side guard interval allocated by the leader sequence.

6. As in claimThe method of claim 4, wherein the terminal determines the parameter according to the size of the front-side or back-side guard interval and the interval of the data subcarriers

The method comprises the following steps:

the terminal takes the value obtained by subtracting half of the interval of the data subcarrier from the size of the front side guard interval and rounding as the parameter

Or

The terminal subtracts the total size of the guard interval, the sum of the size of the rear side guard interval and half of the data subcarrier interval, and the obtained value is used as the parameter

7. The method of any of claims 4-6, wherein the front-side guard interval, the back-side guard interval, and the front-side and back-side guard intervals are in absolute frequency units; alternatively, the first and second electrodes may be,

the unit of the front side guard interval, the rear side guard interval and the front and rear side guard intervals is the number of the subcarriers of the leader sequence.

8. The method of any one of claims 4-6, further comprising:

9. A method according to any of claims 4-6, wherein the parameters are determined at the terminal

Then, the method further comprises the following steps:

10. A preamble sequence baseband signal parameter determination apparatus, comprising:

a searching unit, configured to query a preset parameter set according to the length of the preamble sequence, the interval of the preamble sequence subcarriers, and the interval of the data subcarriers, to obtain a parameter for determining the preamble sequence baseband signal

A determination unit for determining the parameters

Determining a baseband signal of the preamble sequence;

the parameter sets include one or more of:

Is 10;

Is 7;

Is 1;

the length of the leader sequence is 839The interval of the sub-carrier is 3.75KHz, the interval of the data sub-carrier is 15KHz, and the parameters

Is 11;

Is 9;

Is 53;

Is 9;

Is 6;

Is 0;

Is 10;

Is 8;

Is 52;

Is 1;

Is 23;

Is 2;

Is 1;

Is 0;

Is 22;

Is 1;

Is 0.

11. The apparatus of claim 10, further comprising:

a receiving unit, configured to receive one or more of the length of the preamble sequence, the subcarrier interval of the preamble sequence, and the interval of the data subcarrier sent by the network device.

12. The apparatus of claim 10, further comprising:

and the sending unit is used for sending the baseband signal to network equipment or sending a signal obtained by modulating the baseband signal to the network equipment.

13. A preamble sequence baseband signal parameter determination apparatus, comprising:

a first determining unit, configured to determine, according to one or more of a length of a preamble sequence, a subcarrier interval of the preamble sequence, and an interval of a data subcarrier, a total size of guard intervals on front and rear sides of the preamble sequence;

a second determining unit, configured to determine, according to the total size of the guard interval, a size of a front-side or rear-side guard interval allocated to the preamble sequence, where a difference between the size of the front-side or rear-side guard interval and a half of the total size of the guard interval does not exceed a preset threshold;

a third determining unit for determining parameters according to the size of the front or rear guard interval and the interval of the data sub-carrier

Said parameter

A baseband signal for determining the preamble sequence;

a fourth determination unit based on the parameter

Determining a baseband signal of the preamble sequence.

14. The apparatus of claim 13, wherein the second determining unit is specifically configured to:

dividing the total size of the guard interval by 2 to obtain a numerical value, or dividing the total size of the guard interval by 2 and rounding to obtain a numerical value, wherein the numerical value is used as the size of the front side guard interval allocated by the leader sequence; alternatively, the first and second electrodes may be,

adding 1 to the total size of the guard interval, and then dividing the sum by 2 to obtain a numerical value, or dividing the sum by 2 and rounding to obtain a numerical value, wherein the numerical value is used as the size of the front side guard interval allocated by the leader sequence; alternatively, the first and second electrodes may be,

and adding the total size of the guard interval to the subcarrier interval of a leader sequence, and then dividing the value by 2, or dividing the value by 2 and rounding the value to obtain the value which is used as the size of the front side guard interval allocated by the leader sequence.

15. The apparatus of claim 13, wherein the third determining unit is specifically configured to:

subtracting half of the interval of the data sub-carrier from the size of the front side guard interval and rounding to obtain a numerical value as the parameter

Or

Subtracting the total size of the guard interval, the sum of the size of the rear side guard interval and half of the data subcarrier interval, and taking the obtained value as the parameter

16. The apparatus of any one of claims 13-15, wherein the front-side guard interval, the back-side guard interval, and the front-side and back-side guard intervals are in absolute frequency units; alternatively, the first and second electrodes may be,

17. The apparatus of any one of claims 13-15, further comprising:

18. The apparatus of any one of claims 13-15, further comprising: