CN114884639B - Information receiving method, device and storage medium - Google Patents

Abstract

An information receiving method, device and storage medium relate to the field of communication technology and are used to solve the technical problem that the information carried on the PSCCH cannot be efficiently received. The method includes: after receiving the signal to be detected for transmitting the information carried by the PSCCH, and determining the pilot position in the baseband signal according to the obtained baseband signal and multiple types of pilot signals, responding to the first sub- The first correlation value sequence between the signal and the first type of pilot signal meets a first preset condition, and based on the first type of pilot signal, information carried by the PSCCH in the signal to be detected is acquired. The present application can improve the efficiency of receiving information carried on the PSCCH.

Description

An information receiving method, device and storage medium

technical field

The present application belongs to the technical field of circuit detection, and in particular relates to an information receiving method, device and storage medium.

Background technique

Currently, in the long term evolution-vehicle to everything (LTE-V2X) protocol, the physical sidelink control channel (PSCCH) is defined as five frequency domain positions, and the corresponding guide There are 4 types of frequencies. In this case, when the transmitting end device sends relevant information (such as sidelink control information (SCI)) to the receiving end device through the PSCCH, it needs to randomly select one of the five frequency domain positions to carry relevant information, and then randomly select one of the four types of pilot signals, and insert the selected pilot signal into the frequency domain position carrying the relevant information. When receiving relevant information, the receiving device needs to obtain relevant information at a frequency domain position randomly selected by the transmitting device based on the same type of pilot signal as that randomly selected by the transmitting device.

However, the receiving end device cannot know in advance the frequency domain position and the pilot signal selected by the sending end device. Therefore, when receiving relevant information, the receiver device needs to sequentially use four kinds of pilots to perform analysis operations such as channel estimation and equalization, physical control channel decoding, and result verification at each specified frequency domain position until the correct solution is obtained. related information.

Therefore, in this information receiving scheme, the receiving end device needs to repeat these parsing operations up to 20 times to obtain relevant information, which not only easily leads to a long time for receiving information, but also takes up too many computing resources.

Contents of the invention

The present application provides an information receiving method, device and storage medium, which are used to solve the problem that the information carried on the PSCCH cannot be received efficiently.

In order to achieve the above object, the application adopts the following technical solutions:

In a first aspect, a method for receiving information is provided, including: receiving a signal to be detected for transmitting information carried by a PSCCH, and determining a pilot in the baseband signal according to the acquired baseband signal and multiple types of pilot signals After the location, the information carried by the PSCCH in the signal to be detected may be acquired based on the first type of pilot signal in response to the first correlation value sequence between the first sub-signal and the first type of pilot signal meeting the first preset condition.

Wherein, the information carried by the PSCCH is deployed on one subchannel among the multiple subchannels corresponding to the signal to be detected. One type of pilot signal is included on the subchannel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of multiple types of pilot signals. The pilot position of the baseband signal is the same as that of each subchannel. The pilot position is the position of the pilot signal. The first correlation value sequence is used to represent the degree of cross-correlation between the first sub-signal and the first type of pilot signal. The first sub-signal is a pilot signal part of the first sub-channel at a pilot position. The first type of pilot signal is any type of pilot signal among multiple types of pilot signals.

Optionally, according to the baseband signal and multiple types of pilot signals, the specific method for determining the pilot position in the baseband signal includes: determining a second correlation value sequence of the second sub-signal and the second type of pilot signal. The length of the second sub-signal is the same as that of the pilot signal of the second type. The second sub-signal is located anywhere in the baseband signal. The second type of pilot signal is any type of pilot signal among multiple types of pilot signals. In response to the second correlation value sequence meeting the second preset condition, the position of the second sub-signal on the baseband signal is determined as the pilot position.

Optionally, the information receiving method further includes: storing multiple types of pilot signals and pilot positions.

Optionally, the first preset condition includes that the peak-to-average ratio of the first correlation value sequence is greater than or equal to a preset threshold. The second preset condition includes that the peak-to-average ratio of the second correlation value sequence is greater than or equal to a preset threshold.

Optionally, the information receiving method further includes: determining an autocorrelation value sequence of the third type of pilot signal. The sequence of autocorrelation values is used to represent the degree of autocorrelation of the third type of pilot signal. The third type of pilot signal is any type of pilot signal among multiple types of pilot signals. Determine the peak-to-average ratio of the sequence of autocorrelation values as a preset threshold.

Optionally, the information receiving method further includes: determining the time-frequency resource of the pilot position in the first subchannel as the first subsignal. Fast Fourier transform (FFT) is performed on the pilot signal of the first type to obtain the time-frequency resource of the first type. A correlation value sequence of the first sub-signal and the first type of time-frequency resource is determined as the first correlation value sequence.

In a second aspect, an information receiving device is provided, including: a receiving unit and an acquiring unit. The receiving unit is configured to receive a signal to be detected for transmitting information carried by a physical direct link control channel PSCCH. The information carried by the PSCCH is deployed on one subchannel among the multiple subchannels corresponding to the signal to be detected. One type of pilot signal is included on the subchannel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of multiple types of pilot signals. The acquiring unit is used to acquire the baseband signal and multiple types of pilot signals, and determine the position of the pilot in the baseband signal according to the baseband signal and the multiple types of pilot signals. The pilot position of the baseband signal is the same as that of each subchannel. The pilot position is the position of the pilot signal. The acquisition unit is further configured to respond to the first correlation value sequence of the first sub-signal and the first type of pilot signal meeting the first preset condition, based on the first type of pilot signal, to acquire the PSCCH carried by the signal to be detected information. The first correlation value sequence is used to represent the degree of cross-correlation between the first sub-signal and the first type of pilot signal. The first sub-signal is a pilot signal part of the first sub-channel at a pilot position. The first type of pilot signal is any type of pilot signal among multiple types of pilot signals.

Optionally, the acquiring unit is specifically configured to: determine a second correlation value sequence of the second sub-signal and the second type of pilot signal. The length of the second sub-signal is the same as that of the pilot signal of the second type. The second sub-signal is located anywhere in the baseband signal. The second type of pilot signal is any type of pilot signal among multiple types of pilot signals. In response to the second correlation value sequence meeting the second preset condition, the position of the second sub-signal on the baseband signal is determined as the pilot position.

Optionally, the information receiving device further includes: a storage unit. The storage unit is used for storing multiple types of pilot signals and pilot positions.

Optionally, the first preset condition includes that the peak-to-average ratio of the first correlation value sequence is greater than or equal to a preset threshold. The second preset condition includes that the peak-to-average ratio of the second correlation value sequence is greater than or equal to a preset threshold.

Optionally, the information receiving device further includes: a first determining unit. The first determining unit is configured to determine an autocorrelation value sequence of the third type of pilot signal. The sequence of autocorrelation values is used to represent the degree of autocorrelation of the third type of pilot signal. The third type of pilot signal is any type of pilot signal among multiple types of pilot signals. The first determining unit is further configured to determine the peak-to-average ratio of the autocorrelation value sequence as a preset threshold.

Optionally, the information receiving device further includes: a second determining unit. The second determining unit is configured to determine the time-frequency resource of the pilot position in the first subchannel as the first subsignal. The second determining unit is further configured to perform Fast Fourier Transform (FFT) on the first type of pilot signal to obtain the first type of time-frequency resource. The second determining unit is further configured to determine the correlation value sequence of the first sub-signal and the first type of time-frequency resource as the first correlation value sequence.

In a third aspect, an information receiving device is provided, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor is connected to the memory through a bus; when the information receiving device is running, the processor executes the computer-executable instructions stored in the memory, so that the information receiving device executes the information receiving method according to the first aspect.

The information receiving device may be a network device, or a part of devices in the network device, such as a chip system in the network device. The chip system is used to support the network device to implement the functions involved in the first aspect and any possible implementation manner thereof, for example, receiving, determining, and distributing the data and/or information involved in the above data processing method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

A fourth aspect provides a computer-readable storage medium, which is characterized in that the computer-readable storage medium includes computer-executable instructions, and when the computer-readable instructions are run on the computer, the computer executes the information receiving method according to the first aspect.

It should be noted that all or part of the above computer instructions may be stored on the first computer-readable storage medium. Wherein, the first computer-readable storage medium may be packaged together with the processor of the information receiving device, or may be packaged separately with the processor of the information receiving device, which is not limited in this application.

In this application, the names of the above-mentioned information receiving apparatuses do not limit the devices or functional modules themselves, and in actual implementation, these devices or functional modules may appear with other names. As long as the functions of each device or functional module are similar to those of the present application, they fall within the scope of the claims of the present application and their equivalent technologies.

These or other aspects of the present application will be more clearly understood in the following description.

The technical solution provided by the application brings at least the following beneficial effects:

Based on any of the above aspects, in the present application, after receiving the signal to be detected for transmitting the information carried by the PSCCH, and determining the pilot position in the baseband signal according to the acquired baseband signal and multiple types of pilot signals, The information carried by the PSCCH in the signal to be detected may be acquired based on the first type of pilot signal in response to the first correlation value sequence between the first sub-signal and the first type of pilot signal meeting the first preset condition. Wherein, the information carried by the PSCCH is deployed on one subchannel among the multiple subchannels corresponding to the signal to be detected. One type of pilot signal is included on the subchannel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of multiple types of pilot signals. The pilot position of the baseband signal is the same as that of each subchannel. The pilot position is the position of the pilot signal. The first correlation value sequence is used to represent the degree of cross-correlation between the first sub-signal and the first type of pilot signal. The first sub-signal is a pilot signal part of the first sub-channel at a pilot position. The first type of pilot signal is any type of pilot signal among multiple types of pilot signals.

Because the pilot signal has a good correlation, and there are obvious differences in the degree of autocorrelation and cross-correlation. Based on this, this application can first determine the pilot signal inserted in the PSCCH, and then perform analysis operations such as channel estimation and equalization, physical control channel decoding and result verification based on the determined pilot signal, so as to obtain the PSCCH carried information. Compared with the method in the related art that needs to perform up to 20 parsing operations to obtain the information carried on the PSCCH, the present application only needs to determine the pilot signal in advance, and then only one parsing operation is performed to obtain the information carried on the PSCCH , so as to avoid the situation that the receiver device takes too long to obtain relevant information and occupies too many computing resources. Therefore, the present application can improve the efficiency of receiving information carried on the PSCCH.

Description of drawings

FIG. 1 is a schematic diagram of the degree of correlation of pilot signals provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an information receiving system provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a hardware structure of an information receiving device provided in an embodiment of the present application;

FIG. 4 is a first schematic flow diagram of an information receiving method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of the position of the pilot signal provided by the embodiment of the present application;

FIG. 6 is a schematic flow diagram II of an information receiving method provided by an embodiment of the present application;

FIG. 7 is a schematic diagram of division of baseband signals provided by an embodiment of the present application;

FIG. 8 is a schematic flow diagram III of an information receiving method provided in an embodiment of the present application;

FIG. 9 is a schematic flowchart 4 of an information receiving method provided in an embodiment of the present application;

FIG. 10 is a schematic flow diagram five of an information receiving method provided in an embodiment of the present application;

FIG. 11 is a schematic flow diagram VI of an information receiving method provided in an embodiment of the present application;

FIG. 12 is a schematic flow diagram VII of an information receiving method provided in an embodiment of the present application;

FIG. 13 is a schematic structural diagram of an information receiving device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and functions. Personnel can understand that words such as "first" and "second" are not limiting the quantity and execution order.

In addition, the terms "comprising" and "having" in the embodiments of the present application, claims and drawings are not exclusive. For example, a process, method, system, product or device including a series of steps or modules is not limited to the listed steps or modules, and may also include unlisted steps or modules.

In the following, related concepts involved in the embodiments of the present application are explained for easy understanding.

1. PSCCH

In LTE-V2X, the PSCCH is fixedly mapped to 5 frequency domain positions in the transport channel, which are respectively located on 5 sub-channels in the transport channel. Each frequency domain position includes two consecutive resource blocks (recourse blocks, RBs) in one subchannel on the transmission channel. In addition, the PSCCH is usually associated with a physical sidelinkshare channel (PSSCH). Information such as the resource location and coding mode of the PSSCH is usually indicated by the PSCCH.

When the sending end device needs to send a message, it first needs to randomly select a frequency domain position from among the five frequency domain positions and determine it as the PSCCH. After information such as resource location and coding mode is indicated by the PSCCH, the PSSCH can carry the message that the sending end device needs to send. The SCI is carried on the PSCCH, and the SCI indicates information such as the resource location and coding mode of the associated PSSCH. Such information generally includes: frequency domain resource locations of initial transmission and retransmission, time interval of initial transmission and retransmission, modulation and coding scheme, retransmission index, data priority and resource reservation period, etc.

Based on this, in LTE-V2X, when the physical layer of the receiving end device receives a message, it usually needs to perform analysis operations such as channel estimation and equalization, control channel decoding, and SCI decoding on the PSCCH to obtain the SCI, so as to determine the resource location of the PSSCH and encoding method and other information, and further obtain the message sent by the sending end device.

2. Pilot signal

In addition to useful signals, the signals transmitted in wireless communication will also send some control signals to ensure the normal operation of the system. The pilot signal is one of these control signals, and is generally used to ensure system synchronization, channel estimation, and the like. The pilot signal may also be called a demodulation reference signal (demodulation reference signal, DMRS).

In LTE-V2X, there are 4 types of PSCCH pilot signals, which are obtained by multiplying a base sequence by a cyclic shift (CS) with an interval of π/4.

After determining the frequency domain position of the PSCCH, the transmitting end device also needs to randomly determine a frequency domain position where one type of pilot signal is inserted into the PSCCH from the four types of pilot signals. The so-called pilot insertion is to insert an additional low-power line spectrum into the spectrum of the modulated signal so that the receiving device can restore it as a carrier synchronization signal. The sine wave corresponding to this line spectrum is called a pilot signal.

It should be noted that these four types of pilot signals have good auto-correlation and cross-correlation in the frequency domain. As shown in FIG. 1 , it is a schematic diagram of correlation degrees of pilot signals provided by the embodiment of the present application. It should be understood that the degree of correlation between two pilot signals can be easily obtained by those skilled in the art through technical means such as a cross-correlation function or a MATLAB platform, and will not be repeated here.

In FIG. 1 , the abscissa can be used to indicate a frequency domain position, and the ordinate can be used to indicate a correlation value. (a) in FIG. 1 is a schematic diagram of the degree of autocorrelation of one type of pilot signal DMRS1 among the four types of pilot signals. It can be seen that there is only one sharp peak in the correlation value sequence during DMRS1 autocorrelation. (b) in FIG. 1 is a schematic diagram showing the degree of cross-correlation between DMRS1 and another type of pilot signal DMRS2. (c) in FIG. 1 is a schematic diagram showing the degree of cross-correlation between DMRS1 and another type of pilot signal DMRS3. (d) in FIG. 1 is a schematic diagram showing the degree of cross-correlation between DMRS1 and another type of pilot signal DMRS4. It can be seen that two different pilot signals may have multiple similar peaks in the correlation value sequence during cross-correlation. Moreover, the sharp peak of DMRS1 during auto-correlation is usually larger than the peak of cross-correlation with other pilot signals.

Based on this, when determining whether an unknown type of pilot signal is the same type of pilot signal as a known type of pilot signal, it can be considered to determine the correlation degree of the two pilot signals to determine the Whether the two pilot signals are the same type of pilot signal.

3. RB

In wireless communication, the smallest resource granularity in the time domain is an Orthogonal Frequency Division Multiplexing (OFDM) symbol, and the smallest resource granularity in the frequency domain is a subcarrier.

One OFDM symbol and one subcarrier can form one time-frequency resource element (resource element, RE). The RE is the basic unit for resource mapping at the physical layer. All OFDM symbols in a time slot in the time domain and 12 subcarriers in the frequency domain can form an RB. The RB is a basic unit of long term evolution (long term evolution, LTE) resource scheduling.

In combination with the above, after determining the frequency domain position of the PSCCH and a type of pilot signal, the transmitting device will select a specific RE as the pilot position at the frequency domain position according to the method specified in LTE-V2X, and use the one type The pilot signal is inserted at the pilot position.

Currently, in the LTE-V2X protocol, the receiving end device cannot know in advance the frequency domain position and the pilot signal selected by the sending end device. Therefore, when receiving relevant information, the receiver device needs to sequentially use four kinds of pilots to perform analysis operations such as channel estimation and equalization, physical control channel decoding, and result verification at each specified frequency domain position until the correct solution is obtained. related information.

Therefore, in this information receiving scheme, the receiving end device needs to repeat these parsing operations up to 20 times to obtain relevant information, which not only easily leads to a long time for receiving information, but also takes up too many computing resources.

In view of the above problems, the embodiment of this application provides a method for receiving information. In this application,

After receiving the signal to be detected for transmitting the information carried by the PSCCH, and determining the pilot position in the baseband signal according to the acquired baseband signal and multiple types of pilot signals, the first sub-signal and the first The first correlation value sequence of the type of pilot signal meets the first preset condition, and based on the first type of pilot signal, information carried by the PSCCH in the signal to be detected is acquired. Wherein, the information carried by the PSCCH is deployed on one subchannel among the multiple subchannels corresponding to the signal to be detected. One type of pilot signal is included on the subchannel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of multiple types of pilot signals. The pilot position of the baseband signal is the same as that of each subchannel. The pilot position is the position of the pilot signal. The first correlation value sequence is used to represent the degree of cross-correlation between the first sub-signal and the first type of pilot signal. The first sub-signal is a pilot signal part of the first sub-channel at a pilot position. The first type of pilot signal is any type of pilot signal among multiple types of pilot signals.

Because the pilot signal has a good correlation, and there are obvious differences in the degree of autocorrelation and cross-correlation. Based on this, this application can first determine the pilot signal inserted in the PSCCH, and then perform analysis operations such as channel estimation and equalization, physical control channel decoding and result verification based on the determined pilot signal, so as to obtain the PSCCH carried information. Compared with the method in the related art that needs to perform up to 20 parsing operations to obtain the information carried on the PSCCH, the present application only needs to determine the pilot signal in advance, and then only one parsing operation is performed to obtain the information carried on the PSCCH , so as to avoid the situation that the receiver device takes too long to obtain relevant information and occupies too many computing resources. Therefore, the present application can improve the efficiency of receiving information carried on the PSCCH.

The information receiving method is suitable for an information receiving system. Fig. 2 shows a structure of the information receiving system. As shown in FIG. 2 , the information receiving system 100 includes: an information receiving device 101 and an information sending device 102 . The information receiving device 101 and the information sending device 102 are connected by communication.

In practical applications, the information receiving device 101 may be communicatively connected to multiple information sending devices 102 .

For ease of understanding, this application takes the communication connection between the information receiving device 101 and one information sending device 102 as an example for illustration.

In a possible manner, the information receiving device 101 and the information sending device 102 may also be smart vehicle-mounted terminals. The smart vehicle-mounted terminal can be equipped with functional modules such as a global positioning system (GPS) module, a mileage positioning module, and an automobile black box module, and is used to realize driving safety monitoring management, service quality management, and intelligent centralized dispatching for vehicles. Management and electronic stop sign control management and other functions.

In a possible manner, the information receiving device 101 and the information sending device 102 may also be roadside communication devices. The roadside communication device can be equipped with functional modules such as sensor modules, image and video acquisition modules, and communication modules, which can be used to sense information such as traffic status and congestion status on the road, and send information to the intelligent vehicle terminal and other equipment configured on the vehicle. these messages.

In combination with the foregoing, in LTE-V2X, when the information sending apparatus 102 in FIG. 1 sends these information, the PSSCH needs to carry these information. The information such as the resource position and coding mode of the PSSCH is usually indicated by the SCI in the PSCCH. Based on this, when receiving the information, the information receiving device 101 usually needs to first perform analysis operations such as channel estimation and equalization, control channel decoding, and SCI decoding on the PSCCH to obtain the SCI, so as to determine the resource location and coding method of the PSSCH and other information, and The information sent by the information sending device 102 is further obtained.

In yet another possible manner, the information receiving apparatus 101 and the information sending apparatus 102 in FIG. 2 may be terminals, servers, or other electronic devices for receiving information.

When the information receiving device 101 and the information sending device 102 are terminals, both the information receiving device 101 and the information sending device 102 may be devices that provide voice and/or data connectivity to users, handheld devices with wireless connection functions, or Other processing devices connected to the wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (radioaccess network, RAN). The wireless terminal can be a mobile terminal, such as a computer with a mobile terminal, or a portable, pocket, handheld, computer built-in mobile device that exchanges language and/or data with the wireless access network, such as a mobile phone, a tablet computer , notebook computer, netbook, personal digital assistant (personal digital assistant, PDA). The embodiments of the present application do not impose any limitation on this.

When the information receiving device 101 and the information sending device 102 are servers, both the information receiving device 101 and the information sending device 102 may be a single server, or may be a server cluster composed of multiple servers. In some implementations, the server cluster may also be a distributed cluster. The embodiments of the present application do not impose any limitation on this.

Referring to FIG. 2 , as shown in FIG. 3 , it is a schematic diagram of the hardware structure of the information receiving device 101 provided by the embodiment of the present application. The information receiving device 101 includes a processor 21 , a memory 22 , a communication interface 23 and a bus 24 . The processor 21 , the memory 22 and the communication interface 23 may be connected through a bus 24 .

The processor 21 is the control center of the information receiving device 101, and may be one processor, or a general term for multiple processing elements. For example, the processor 21 may be a general-purpose central processing unit (central processing unit, CPU), or other general-purpose processors. Wherein, the general-purpose processor may be a microprocessor or any conventional processor.

As an embodiment, the processor 21 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 3 .

Memory 22 may be read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM) or other types that can store information and instructions The dynamic storage device can also be an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a magnetic disk storage medium or other magnetic storage devices, or can be used to carry or store instructions or data structures desired program code and any other medium that can be accessed by a computer, but not limited thereto.

In a possible implementation manner, the memory 22 may exist independently of the processor 21, and the memory 22 may be connected to the processor 21 through the bus 24 for storing instructions or program codes. When the processor 21 invokes and executes the instructions or program codes stored in the memory 22, the information receiving method provided by the following embodiments of the present application can be realized.

In another possible implementation manner, the memory 22 may also be integrated with the processor 21 .

The communication interface 23 is used for connecting the information receiving apparatus 101 with other devices through a communication network, and the communication network may be Ethernet, wireless access network, wireless local area network (wireless local area networks, WLAN) and the like. The communication interface 23 may include a receiving unit for receiving data, and a sending unit for sending data.

The bus 24 may be an industry standard architecture (industry standard architecture, ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 3 , but it does not mean that there is only one bus or one type of bus.

It should be pointed out that the structure shown in FIG. 3 does not constitute a limitation to the information receiving device 101. Except for the components shown in FIG. 3, the information receiving device 101 may include more or less components than those shown in the illustration , or combinations of certain components, or different arrangements of components.

As shown in FIG. 4 , it is a schematic flow chart of an information receiving method provided in the embodiment of the present application. The information receiving method is applied to the information receiving system shown in FIG. 2 and can be executed by the information receiving device shown in FIG. 2 . Exemplarily, the hardware implementation of the information receiving apparatus may refer to the related content in the aforementioned FIG. 3 , which will not be repeated here. In some optional implementation manners, the information receiving device may also be implemented by software, and the software structure of the information receiving state may refer to the relevant content in FIG. 13 below, which will not be repeated here.

Referring to FIG. 4 , the information receiving method provided by the embodiment of the present application includes: S401-S403.

S401. The information receiving device receives a signal to be detected for transmitting information carried by a PSCCH.

Wherein, the information carried by the PSCCH is deployed on one subchannel among the multiple subchannels corresponding to the signal to be detected. One type of pilot signal is included on the subchannel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of multiple types of pilot signals.

It should be understood that the information carried by the PSCCH may be SCI, which is used to indicate information such as resource location and coding mode of the PSSCH. In this way, the communication message for transmitting service data that the information sending device needs to send to the information receiving device can be carried by the PSSCH.

In a possible manner, the plurality of subchannels corresponding to the signal to be detected may be 5 subchannels corresponding to 5 frequency domain positions of the PSCCH specified in LTE-V2X.

Optionally, the multiple types of pilot signals may be four types of pilot signals corresponding to the PSCCH specified in LTE-V2X.

Specifically, referring to FIG. 2, when the information sending device sends a communication message for transmitting service data to the information receiving device on the PSSCH, in order to facilitate the information receiving device to receive the communication message, it is necessary to carry the PSCCH on the PSCCH to indicate the resource location of the PSSCH and encoding methods, etc. (such as SCI).

In this case, the information sending device may first randomly select a subchannel from the 5 subchannels on the transmission channel, determine the 2 RBs on the subchannel specified in LTE-V2X as the PSCCH, and select from 4 types of RBs Among the pilot signals, one type of pilot signal is randomly determined and inserted into the two RBs where the PSCCH is located.

Next, the information sending device may carry information for indicating the resource location and coding mode of the PSSCH on the PSCCH, and send a signal to be detected for transmitting the information carried by the PSCCH on the transmission channel. Correspondingly, the information receiving device can receive the signal to be detected from the information sending device.

S402. The information receiving device acquires a baseband signal and multiple types of pilot signals, and determines a pilot position in the baseband signal according to the baseband signal and the multiple types of pilot signals.

Wherein, the pilot position of the baseband signal is the same as the pilot position of each sub-channel. The pilot position is the position of the pilot signal.

In a possible manner, when both the baseband signal and the signal to be detected are generated based on the LTE-V2X protocol, the method and position of inserting the pilot signal into the baseband signal are the same as the method and position of inserting the pilot signal into the signal to be detected of. Therefore, the pilot position of the baseband signal is the same as the pilot position of each of the multiple sub-channels corresponding to the signal to be detected.

It should be noted that in LTE-V2X, the REs occupied by the pilot positions in the 5 subchannels corresponding to the 5 possible frequency domain positions of the PSCCH are fixed, and the pilot positions in each subchannel are the same.

Specifically, considering that the pilot position of the baseband signal is the same as the pilot position of each subchannel in the plurality of subchannels corresponding to the signal to be detected, when determining the specific position where the pilot signal is inserted in the PSCCH, the information receiving device can determine the baseband The pilot position in the signal is used to determine the pilot position in the PSCCH.

In this case, in order to determine the pilot position in the baseband signal, the information receiving device can obtain multiple types of pilot signals and baseband signals, and determine the pilot position in the baseband signal according to the multiple types of pilot signals and baseband signals. frequency position.

In a possible implementation manner, the acquisition of the baseband signal may be implemented based on a specific terminal device (such as a computer, etc.). The specific terminal device may be configured with computer external input devices such as a mouse and a keyboard, or may be configured with a universal software radio peripheral (universal software radio peripheral, USRP) and a MATLAB platform. When obtaining the baseband signal, the staff can issue a signal receiving instruction to the terminal device through the computer external input device configured on the terminal device. In response to the signal receiving instruction issued by the staff, the terminal device can first receive the LTE-V2X air interface data of the 5915M frequency point and the 20M frequency band through the USRP, and then directly call the USRP hardware drivers (USRPhardware drivers, UHD) through the MATLAB platform to obtain the baseband signal.

Alternatively, the staff can also connect an input device through the computer configured with the terminal device, execute code writing operations on the MATLAB platform configured with the terminal device, and issue code execution instructions. In response to the code execution instructions issued by the staff, the terminal device can directly generate a baseband signal based on the LTE-V2X protocol through the configured MATLAB platform.

It should be understood that based on a similar manner, the terminal device may also directly generate four types of pilot signals corresponding to the PSCCH based on the LTE-V2X protocol.

Next, referring to FIG. 3 , the staff can issue an information sending instruction to the terminal device through the computer external input device configured on the terminal device. In response to the information sending instruction issued by the staff, the terminal device can send the obtained baseband signal and four types of pilot signals to the information receiving device. Correspondingly, the information receiving device can receive the baseband signal and the four types of pilot signals through the configured communication interface, and store the baseband signal and the four types of pilot signals in the memory.

In a possible manner, referring to FIG. 3 , the information receiving device is configured to directly read multiple types of pilot signals and baseband signals pre-stored in the memory when multiple types of pilot signals and baseband signals need to be obtained. .

Next, the information receiving device may determine the pilot position in the baseband signal according to the acquired baseband signal and multiple types of pilot signals.

In a possible manner, the information receiving device may use a sliding correlation method when determining the pilot position in the baseband signal according to the baseband signal and multiple types of pilot signals. That is, a sliding correlation is performed on all positions of the baseband signal for each type of pilot signal to determine the position of the pilot in the baseband signal.

S403. In response to the first correlation value sequence between the first sub-signal and the first type of pilot signal meeting the first preset condition, the information receiving device acquires the information carried by the PSCCH in the signal to be detected based on the first type of pilot signal .

Wherein, the first correlation value sequence is used to represent the degree of mutual correlation between the first sub-signal and the first type of pilot signal. The first sub-signal is a pilot signal part of the first sub-channel at a pilot position.

The first type of pilot signal is any type of pilot signal among multiple types of pilot signals.

The first preset condition includes that the peak-to-average ratio of the first correlation value sequence is greater than or equal to a preset threshold.

Optionally, the preset threshold may be a peak-to-average ratio of a correlation value sequence during autocorrelation of the pilot signal.

Specifically, in conjunction with FIG. 5, after receiving the signal to be detected and determining the pilot position of the baseband signal, as shown in FIG. 5, the pilot position of the baseband signal and the multiple subchannels corresponding to the signal to be detected The pilot position of each subchannel in the first subchannel is the same, therefore, the information receiving device can use the pilot position of the frequency domain position 2 (that is, the 2 RBs specified by LTE-V2X) in the pilot position of the first subchannel according to the pilot position of the baseband signal The frequency signal part is determined as the first sub-signal. Next, the information receiving device may determine a first correlation value sequence of the first sub-signal and the first type of pilot signal.

In response to the first correlation value sequence of the first sub-signal and the first type of pilot signal meeting the first preset condition, that is, when the peak-to-average ratio of the first correlation value sequence is greater than or equal to a preset threshold, the information receiving device may The degree of correlation between the first sub-signal and the first type of pilot signal is determined to be autocorrelation, that is, the first sub-channel is inserted with the first type of pilot signal. Further, the information receiving device may determine that the 2 RBs specified by LTE-V2X in the first subchannel are the PSCCH. In this case, the information receiving apparatus may acquire the information carried by the PSCCH in the signal to be detected based on the first type of pilot signal.

In a possible implementation mode, when the information receiving device determines the pilot position in the baseband signal according to the baseband signal and multiple types of pilot signals, this embodiment provides a possible implementation mode, as shown in Figure 6 , including: S501-S502.

S501. The information receiving apparatus determines a second correlation value sequence of a second sub-signal and a second-type pilot signal.

Wherein, the length of the second sub-signal is the same as that of the second type of pilot signal. The second sub-signal is located anywhere in the baseband signal. The second type of pilot signal is any type of pilot signal among multiple types of pilot signals.

Specifically, the information receiving device can obtain the start position and end position of the OFDM symbol in the baseband signal according to the synchronization sequence specified in the LTE-V2X protocol, that is, the transmission start position and transmission position of the information carried in the baseband signal in the time domain. end position. As shown in FIG. 7 , the starting position of the OFDM symbol in the baseband signal may be a position away from the initial position of the baseband signal by a distance of θ.

In a possible manner, the information receiving device may also determine the start position and end position of the OFDM symbol in the baseband signal according to the synchronous clock sequence.

Next, the information receiving device may process the second type of pilot signal through fast Fourier transform (fastFourier transform, FFT) and window function to obtain the second type of pilot signal whose length is L as shown in FIG. 7 sliding window. The second type of pilot signal may be any of a plurality of types of pilot signals.

Next, as shown in Figure 7, the information receiving device can slide the sliding window of the second type of pilot signal from the starting position of the OFDM symbol, that is, the first part, and after each sliding, determine the sliding window and the baseband A sequence of correlation values for corresponding parts on a signal. The first part is the part on the baseband signal extended by L from the starting position of the OFDM symbol, which is the same as the length of the sliding window.

The information receiving device can determine the correlation value sequence of any part of the baseband signal and the sliding window according to the first formula. The first formula is:

Wherein, C _i (θ) is the sliding window of the i-th type of pilot signal and the correlation value sequence of any part. θ is the distance between the initial position of the sliding window and the initial position of the baseband signal. L is the length of the first part. r ^* (x) is the conjugate of the first part. p _i (n) is the sliding window of the i-th type of pilot signal, i=1, 2, . . . , 4. N is the length of the i-th type of pilot signal. It should be understood that the values of L and N may be the same, which is used to indicate that the length of the first part is the same as the length of the sliding window.

After determining the correlation value sequences of all parts and sliding windows on the baseband signal, the information receiving device can use whether the peak-to-average ratio of a correlation value sequence is greater than the preset threshold as the maximum likelihood decision criterion, so that according to the second formula, the baseband signal The maximum likelihood decision is made on all parts and the correlation value sequence of the sliding window to determine the part of the baseband signal that meets the maximum likelihood decision criterion. The second formula is:

为相关值序列符合最大似然判决准则时的导频信号的类型，/>

为相关值序列符合最大似然判决准则时，基带信号部分的起始位置与初始位置相距的距离。C_i(θ)为第i类型的导频信号的滑动窗和任意部分的相关值序列。in,

is the type of pilot signal when the correlation value sequence conforms to the maximum likelihood decision criterion, />

is the distance between the starting position of the baseband signal part and the initial position when the correlation value sequence conforms to the maximum likelihood decision criterion. C _i (θ) is the sliding window of the i-th type of pilot signal and the correlation value sequence of any part.

It should be understood that the peak-to-average ratio is the ratio of the maximum peak value of the correlation value sequence to the average value of the correlation value sequence.

S502. In response to the second correlation value sequence meeting the second preset condition, the information receiving device determines a position of the second sub-signal on the baseband signal as a pilot position.

Wherein, the second preset condition includes that the peak-to-average ratio of the second correlation value sequence is greater than or equal to a preset threshold.

In one possible way, in response to the second correlation value sequence meeting the second preset condition, the information receiving device can determine that the second sub-signal on the baseband signal and the second type of pilot signal are autocorrelated, that is, the baseband The resource position of the second sub-signal on the signal is the position of the pilot signal. In this case, the information receiving device determines the position of the second sub-signal on the baseband signal as the pilot position.

7, when the sliding window of the second type of pilot signal slides to the second part, if the sliding window of the second type of pilot signal and the correlation value sequence of the second part meet the maximum likelihood decision criterion, then the information The receiving device may determine that the sliding window of the second part on the baseband signal and the second type of pilot signal is the degree of autocorrelation, that is, the second part on the baseband signal is the position of the pilot signal, and the pilot signal is the second type of pilot signal.

In a possible implementation manner, in the above S402, after the information receiving device determines the pilot position in the baseband signal, based on the method embodiment shown in FIG. 4 , this embodiment provides a possible implementation manner, as shown in FIG. 8 shown, including: S601.

S601. The information receiving device stores multiple types of pilot signals and pilot positions.

Referring to FIG. 3 , after determining the pilot position in the baseband signal, in order to improve the efficiency of receiving information carried by the PSCCH next time, the information receiving device may store multiple types of pilot signals and pilot positions in the configured memory.

In this way, when it is necessary to obtain multiple types of pilot signals and pilot positions to determine the first correlation value sequence between the first sub-signal and the first type of pilot signal, the information receiving device can directly read the memory Multiple types of pilot signals and pilot positions stored in .

In a possible implementation manner, in order to determine the preset threshold, this embodiment provides a possible implementation manner, as shown in FIG. 9 , including: S701-S702.

S701. The information receiving apparatus determines an autocorrelation value sequence of a third type of pilot signal.

Wherein, the autocorrelation value sequence is used to represent the degree of autocorrelation of the second type of pilot signal. The second type of pilot signal is any type of pilot signal among multiple types of pilot signals.

Specifically, the information receiving device may randomly select one type of pilot signal from among the four types of pilot signals corresponding to the PSCCH specified in LTE-V2X to determine as the third type of pilot signal, and determine the third type of pilot signal. A sequence of autocorrelation values for the pilot signal.

With reference to FIG. 1 , the autocorrelation value sequence of the third type of pilot signal can be understood with reference to (a) in FIG. 1 .

S702. The information receiving device determines the peak-to-average ratio of the autocorrelation value sequence as a preset threshold.

It should be noted that, referring to FIG. 1 , one type of pilot signal has a sharp peak during autocorrelation, and other values are relatively low. However, when two different pilot signals are cross-correlated, there will be multiple similar peaks. Therefore, there will be a significant difference in the peak-to-average ratio of the correlation value series in the two different cases.

Based on the above, after determining the autocorrelation value sequence of the third type of pilot signal, the information receiving device determines the average value of the autocorrelation value sequence, and determines the peak value in the autocorrelation value sequence, so that the autocorrelation value sequence The ratio of the peak value to the mean value was determined as the preset threshold.

In a possible implementation manner, in order to determine the first correlation value sequence between the first sub-signal and the first type of pilot signal, this embodiment provides a possible implementation manner, as shown in FIG. 10 , including: S801- S803.

S801. The information receiving apparatus determines the time-frequency resource of the pilot position in the first subchannel as the first subsignal.

In a possible implementation, after determining the pilot position of the baseband signal, since the pilot position of the baseband signal is the same as the pilot position of each subchannel in the multiple subchannels corresponding to the signal to be detected, the information receiving device can According to the pilot position of the baseband signal, the part of the pilot signal at the pilot position in the frequency domain position 2 (that is, the 2 RBs specified by LTE-V2X) in the first subchannel is determined as the first sub-signal.

S802. The information receiving apparatus performs fast Fourier transform (FFT) on the pilot signal of the first type to obtain the time-frequency resource of the first type.

Optionally, in order to perform cross-correlation between the first type of pilot signal and the first sub-signal, the information receiving apparatus may perform FFT on the first type of pilot signal to obtain the first type of time-frequency resource. In this way, the pilot signal of the first type is modulated to the same standard as the first sub-signal, so that the degree of correlation between the two signals can be determined.

S803. The information receiving apparatus determines a correlation value sequence between the first sub-signal and the first type of time-frequency resource as a first correlation value sequence.

In a possible manner, the information receiving apparatus may determine a correlation value sequence between the first sub-signal and the first type of time-frequency resource according to the third formula. The third formula is:

Wherein, R _j ^* (M) is the possible frequency domain position of the jth PSCCH, j=1, 2, . . . , 5. D _k (M) is the time-frequency resource of the kth type, k=1, 2, . . . , 4. H is the frequency-domain sequence length of the k-th type of time-frequency resource.

In a way that can be realized, as shown in Figure 11, the information receiving device can use the four types of DMRS specified by LTE-V2X and the pilot positions in the five frequency domain positions specified by LTE-V2X in the signal to be detected After performing cross-correlation in sequence on the time-frequency resource units of , 20 (that is, 4 times 5) correlation value sequences are obtained. Next, the information receiving device can set the peak-to-average ratio of the correlation value sequence greater than or equal to the preset threshold as the maximum likelihood judgment criterion, and perform maximum likelihood judgment on the 20 correlation value sequences to obtain the DMRS of the target type and the target frequency domain location. Next, the information receiving apparatus may determine the target frequency domain position as the PSCCH, and demodulate the PSCCH based on the DMRS of the target type to obtain the SCI.

In a manner that can be implemented, referring to FIG. 11, as shown in FIG. 12, the information receiving device can decode the PSCCH based on the DMRS of the target type after receiving the signal and determining the frequency domain position of the PSCCH and the type of the pilot signal. Tune. Before demodulating the PSCCH, the information receiving device needs to perform channel estimation and equalization first, that is, first use the DMRS of the target type to perform zero-forcing channel estimation on the PSCCH, and then generate a complete channel estimation of the PSCCH based on the linear interpolation method, and perform channel equalization.

Next, the information receiving device may decompress the transmission precoding, and perform M-point inverse fast Fourier transform (IFFT) on the OFDM symbols on the PSCCH. That is, perform IFFT (1, M) on the OFDM symbols on the PSCCH, where M is a positive integer.

Next, the information receiving device can demodulate the digital signal after detransmission precoding, and perform soft-decision decoding on the constellation diagram of the digital signal on the complex plane, so as to correct the error of the demodulated digital signal.

Optionally, the demodulation mode may be a digital modulation mode of quadrature phase shift keying (QPSK),

Then, after correcting the demodulated digital signal to restore the original code, the information receiving device can use a specific bit scrambling code sequence to descramble the digital signal, and restore the scrambled digital signal to the original digital signal .

Then, the information receiving device can restore the scrambled information in the digital signal through the interleaving matrix.

Next, the information receiving device can perform rate recovery on the restored information, that is, restore the deinterleaved digital signal to three channels of bits output by the convolutional code encoder through depuncturing and derepetition processing.

Next, the information receiving device may use 1/3 tail-biting convolutional code coding to perform Viterbi decoding on the three channels of bits to obtain bits before convolutional code coding.

In order to verify whether the obtained bits of the convolutional code before encoding are correct SCIs, the information receiving device may use a cyclic redundancy check (cyclic redundancy check, CRC) to check the bits of the convolutional code before encoding, and the obtained convolutional code The bits before the product code encoding are divided by the primitive polynomial by the modulo two division method. If the remainder is 0, the CRC check is passed. In this case, the information receiving device can determine that the deciphered SCI is correct. If the remainder is not 0, it means that there are garbled bits in the obtained convolutional code before encoding. In this case, the information receiving device may determine that the resolved SCI is wrong, that is, PSCCH detection and identification.

In the embodiment of the present application, after the information receiving device receives the signal to be detected for transmitting the information carried by the PSCCH, and determines the pilot position in the baseband signal according to the acquired baseband signal and multiple types of pilot signals, it can In response to the first correlation value sequence between the first sub-signal and the first type of pilot signal meeting the first preset condition, information carried by the PSCCH in the signal to be detected is acquired based on the first type of pilot signal. Wherein, the information carried by the PSCCH is deployed on one subchannel among the multiple subchannels corresponding to the signal to be detected. One type of pilot signal is included on the subchannel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of multiple types of pilot signals. The pilot position of the baseband signal is the same as that of each subchannel. The pilot position is the position of the pilot signal. The first correlation value sequence is used to represent the degree of cross-correlation between the first sub-signal and the first type of pilot signal. The first sub-signal is a pilot signal part of the first sub-channel at a pilot position. The first type of pilot signal is any type of pilot signal among multiple types of pilot signals.

Because the pilot signal has a good correlation, and there are obvious differences in the degree of autocorrelation and cross-correlation. Based on this, this application can first determine the pilot signal inserted in the PSCCH, and then perform analysis operations such as channel estimation and equalization, physical control channel decoding and result verification based on the determined pilot signal, so as to obtain the PSCCH carried information. Compared with the method in the related art that needs to perform up to 20 parsing operations to obtain the information carried on the PSCCH, the present application only needs to determine the pilot signal in advance, and then only one parsing operation is performed to obtain the information carried on the PSCCH , so as to avoid the situation that the receiver device takes too long to obtain relevant information and occupies too many computing resources. Therefore, the present application can improve the efficiency of receiving information carried on the PSCCH.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of methods. In order to realize the above functions, it includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the information receiving device into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. Optionally, the division of modules in this embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.

As shown in FIG. 13 , it is a schematic structural diagram of an information receiving device provided in an embodiment of the present application. The information receiving device can be used to execute the information receiving methods shown in FIG. 4 , FIG. 6 and FIG. 8 to FIG. 10 . The information receiving device shown in FIG. 13 belongs to an information receiving system including an information receiving device and an information sending device. The information receiving apparatus includes: a receiving unit 901 and an acquiring unit 902 .

The receiving unit 901 is configured to receive a signal to be detected for transmitting information carried by a physical direct link control channel PSCCH. The information carried by the PSCCH is deployed on one subchannel among the multiple subchannels corresponding to the signal to be detected. One type of pilot signal is included on the subchannel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of multiple types of pilot signals. For example, referring to FIG. 4 , the receiving unit 901 may be configured to perform S401.

The acquiring unit 902 is configured to acquire a baseband signal and multiple types of pilot signals, and determine a pilot position in the baseband signal according to the baseband signal and multiple types of pilot signals. The pilot position of the baseband signal is the same as that of each subchannel. The pilot position is the position of the pilot signal. For example, referring to FIG. 4 , the acquiring unit 902 may be configured to execute S402.

The acquiring unit 902 is further configured to acquire the PSCCH bearer in the signal to be detected based on the first type of pilot signal in response to the first correlation value sequence of the first sub-signal and the first type of pilot signal meeting the first preset condition Information. The first correlation value sequence is used to represent the degree of cross-correlation between the first sub-signal and the first type of pilot signal. The first sub-signal is a pilot signal part of the first sub-channel at a pilot position. The first type of pilot signal is any type of pilot signal among multiple types of pilot signals. For example, referring to FIG. 4 , the acquiring unit 902 may be configured to execute S403.

Optionally, the acquiring unit 902 is specifically used for:

A second sequence of correlation values for the second sub-signal and the pilot signal of the second type is determined. The length of the second sub-signal is the same as that of the pilot signal of the second type. The second sub-signal is located anywhere in the baseband signal. The second type of pilot signal is any type of pilot signal among multiple types of pilot signals. For example, referring to FIG. 6 , the obtaining unit 902 may be configured to execute S501.

In response to the second correlation value sequence meeting the second preset condition, the position of the second sub-signal on the baseband signal is determined as the pilot position. For example, referring to FIG. 6 , the obtaining unit 902 may be configured to execute S502.

Optionally, the information receiving apparatus further includes: a storage unit 903 .

The storage unit 903 is configured to store multiple types of pilot signals and pilot positions. For example, referring to FIG. 8 , the storage unit 903 may be used to execute S601.

Optionally, the first preset condition includes that the peak-to-average ratio of the first correlation value sequence is greater than or equal to a preset threshold. The second preset condition includes that the peak-to-average ratio of the second correlation value sequence is greater than or equal to a preset threshold.

Optionally, the information receiving apparatus further includes: a first determining unit 904 .

The first determining unit 904 is configured to determine an autocorrelation value sequence of the third type of pilot signal. The sequence of autocorrelation values is used to represent the degree of autocorrelation of the third type of pilot signal. The third type of pilot signal is any type of pilot signal among multiple types of pilot signals. For example, referring to FIG. 9 , the first determining unit 904 may be configured to perform S701.

The first determining unit 904 is further configured to determine the peak-to-average ratio of the autocorrelation value sequence as a preset threshold. For example, referring to FIG. 9 , the first determining unit 904 may be configured to execute S702.

Optionally, the information receiving apparatus further includes: a second determining unit 905 .

The second determining unit 905 is configured to determine the time-frequency resource of the pilot position in the first subchannel as the first subsignal. For example, referring to FIG. 10 , the second determining unit 905 may be configured to perform S801.

The second determining unit 905 is further configured to perform fast Fourier transform (FFT) on the first type of pilot signal to obtain the first type of time-frequency resource. For example, referring to FIG. 10 , the second determination unit 905 may be configured to perform S802.

The second determining unit 905 is further configured to determine the correlation value sequence of the first sub-signal and the first type of time-frequency resource as the first correlation value sequence. For example, referring to FIG. 10 , the second determining unit 905 may be configured to perform S803.

Those skilled in the art should be aware that, in the above one or more examples, the functions described in this application may be implemented by hardware, software, firmware or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer-readable storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation. For example a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. A unit described as a separate component may or may not be physically separated, and a component shown as a unit may be one physical unit or multiple physical units, which may be located in one place or distributed to multiple different places. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above is only a specific embodiment of the application, but the scope of protection of the application is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. All should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (14)

1. An information receiving method, comprising:

receiving a signal to be detected for transmitting information carried by a physical direct link control channel PSCCH; the information carried by the PSCCH is deployed on one of a plurality of sub-channels corresponding to the signal to be detected; the sub-channels for deploying the information carried by the PSCCH comprise a pilot signal of one type; the pilot signal of one type is any one of a plurality of types of pilot signals;

acquiring a baseband signal and the pilot signals of the multiple types, and determining pilot positions in the baseband signal according to the baseband signal and the pilot signals of the multiple types; the pilot frequency position of the baseband signal is the same as the pilot frequency position of each sub-channel; the pilot frequency position is the position of a pilot frequency signal;

Responding to a first correlation value sequence of a first sub-signal and a pilot signal of a first type to accord with a first preset condition, and acquiring information carried by the PSCCH in the signal to be detected based on the pilot signal of the first type; the first correlation value sequence is used for representing the cross-correlation degree of the first sub-signal and the pilot signal of the first type; the first sub-signal is a pilot signal part of the first sub-channel at the pilot position; the first type of pilot signal is any one of the plurality of types of pilot signals.

2. The information receiving method according to claim 1, wherein the determining the pilot position in the baseband signal from the baseband signal and the plurality of types of pilot signals includes:

determining a second correlation value sequence of the second sub-signal and the pilot signal of the second type; the second sub-signal and the pilot signal of the second type have the same length; the second sub-signal is located at any position in the baseband signal; the second type of pilot signal is any one of the plurality of types of pilot signals;

And determining the position of the second sub-signal on the baseband signal as the pilot frequency position in response to the second correlation value sequence meeting a second preset condition.

3. The information receiving method according to claim 1, wherein after the determining the pilot position in the baseband signal, further comprising:

the plurality of types of pilot signals and the pilot locations are stored.

4. The information receiving method according to claim 2, wherein the first preset condition includes a peak-to-average ratio of the first correlation value sequence being greater than or equal to a preset threshold; the second preset condition includes that a peak-to-average ratio of the second correlation value sequence is greater than or equal to the preset threshold.

5. The information receiving method according to claim 4, further comprising:

determining an autocorrelation value sequence of the pilot signal of the third type; the autocorrelation value sequence is used for representing the autocorrelation degree of the pilot signal of the third type; the third type of pilot signal is any one of the plurality of types of pilot signals;

and determining the peak-to-average ratio of the autocorrelation value sequence as the preset threshold.

6. The information receiving method according to claim 1, characterized by further comprising:

determining a time-frequency resource of the pilot frequency position in the first sub-channel as the first sub-signal;

performing Fast Fourier Transform (FFT) on the pilot signals of the first type to obtain time-frequency resources of the first type;

and determining the correlation value sequence of the first sub-signal and the first type of time-frequency resource as the first correlation value sequence.

7. An information receiving apparatus, comprising: a receiving unit and an acquiring unit;

the receiving unit is used for receiving a signal to be detected for transmitting information carried by a physical direct link control channel PSCCH; the information carried by the PSCCH is deployed on one of a plurality of sub-channels corresponding to the signal to be detected; the sub-channels for deploying the information carried by the PSCCH comprise a pilot signal of one type; the pilot signal of one type is any one of a plurality of types of pilot signals;

the acquisition unit is used for acquiring a baseband signal and the pilot signals of the multiple types, and determining the pilot positions in the baseband signal according to the baseband signal and the pilot signals of the multiple types; the pilot frequency position of the baseband signal is the same as the pilot frequency position of each sub-channel; the pilot frequency position is the position of a pilot frequency signal;

The acquiring unit is further configured to acquire information carried by the PSCCH in the signal to be detected based on the pilot signal of the first type, in response to a first correlation value sequence between the first sub-signal and the pilot signal of the first type conforming to a first preset condition; the first correlation value sequence is used for representing the cross-correlation degree of the first sub-signal and the pilot signal of the first type; the first sub-signal is a pilot signal part of the first sub-channel at the pilot position; the first type of pilot signal is any one of the plurality of types of pilot signals.

8. The information receiving apparatus according to claim 7, wherein the acquisition unit is specifically configured to:

determining a second correlation value sequence of the second sub-signal and the pilot signal of the second type; the second sub-signal and the pilot signal of the second type have the same length; the second sub-signal is located at any position in the baseband signal; the second type of pilot signal is any one of the plurality of types of pilot signals;

and determining the position of the second sub-signal on the baseband signal as the pilot frequency position in response to the second correlation value sequence meeting a second preset condition.

9. The information receiving apparatus according to claim 7, characterized by further comprising: a storage unit;

the storage unit is used for storing the pilot signals of the multiple types and the pilot positions.

10. The information receiving apparatus according to claim 8, wherein the first preset condition includes a peak-to-average ratio of the first correlation value sequence being greater than or equal to a preset threshold; the second preset condition includes that a peak-to-average ratio of the second correlation value sequence is greater than or equal to the preset threshold.

11. The information receiving apparatus according to claim 10, characterized by further comprising: a first determination unit;

the first determining unit is used for determining an autocorrelation value sequence of a pilot signal of a third type; the autocorrelation value sequence is used for representing the autocorrelation degree of the pilot signal of the third type; the third type of pilot signal is any one of the plurality of types of pilot signals;

the first determining unit is further configured to determine a peak-to-average ratio of the autocorrelation value sequence as the preset threshold.

12. The information receiving apparatus according to claim 7, characterized by further comprising: a second determination unit;

The second determining unit is configured to determine, as the first sub-signal, a time-frequency resource of the pilot frequency position in the first sub-channel;

the second determining unit is further configured to perform a fast fourier transform FFT on the pilot signal of the first type to obtain a time-frequency resource of the first type;

the second determining unit is further configured to determine a correlation value sequence of the first sub-signal and the first type of time-frequency resource as the first correlation value sequence.

13. An information receiving apparatus comprising a memory and a processor; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus; when the information receiving apparatus is operated, the processor executes the computer-executable instructions stored in the memory to cause the information receiving apparatus to perform the information receiving method according to any one of claims 1 to 6.

14. A computer-readable storage medium comprising computer-executable instructions that, when run on a computer, cause the computer to perform the information receiving method of any of claims 1-6.

Images