CN114884639B

CN114884639B - Information receiving method, device and storage medium

Info

Publication number: CN114884639B
Application number: CN202210562358.8A
Authority: CN
Inventors: 张澜; 陈礼波; 杨宇
Original assignee: China United Network Communications Group Co Ltd; China Information Technology Designing and Consulting Institute Co Ltd
Current assignee: China United Network Communications Group Co Ltd; China Information Technology Designing and Consulting Institute Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2023-06-30
Anticipated expiration: 2042-05-23
Also published as: CN114884639A

Abstract

An information receiving method, an information receiving device and a storage medium relate to the technical field of communication and are used for solving the technical problem that information borne on a PSCCH cannot be received efficiently. The method comprises the following steps: after receiving a signal to be detected for transmitting information carried by the PSCCH, and determining a pilot position in the baseband signal according to the obtained baseband signal and the plurality of types of pilot signals, the information carried by the PSCCH in the signal to be detected can be obtained 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 conforming to a first preset condition. The method and the device can improve the efficiency of receiving the information carried on the PSCCH.

Description

Information receiving method, device and storage medium

Technical Field

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

Background

Currently, in the internet of vehicles wireless communication technology (long term evolution-vehicle to everything, LTE-V2X) protocol, a physical through link control channel (physical sidelink control channel, PSCCH) is specified as 5 frequency domain locations, and there are 4 corresponding pilots. In this case, when the transmitting end device transmits related information (for example, through link control information (sidelink control information, SCI)) to the receiving end device through the PSCCH, it is necessary to randomly select one of the 5 frequency domain positions to carry the related information, then randomly select one of the 4 types of pilot signals, and insert the selected pilot signal into the frequency domain position carrying the related information. When receiving the related information, the receiving end device needs to acquire the related information at the frequency domain position randomly selected by the transmitting end device based on the pilot signal of the same type as the randomly selected type of the transmitting end device.

However, the receiving end device cannot know in advance the frequency domain location and pilot signal selected by the transmitting end device. Therefore, when receiving the relevant information, the receiving end device needs to perform analysis operations such as channel estimation and equalization, decoding of the physical control channel, and result verification at each predetermined frequency domain position sequentially using the 4 kinds of pilots until the relevant information is correctly decoded.

Therefore, in the information receiving scheme, the receiving end device needs to repeat the parsing operations for 20 times at most to obtain the relevant information, which not only easily results in too long information receiving time, but also occupies too much computing resources.

Disclosure of Invention

The application provides an information receiving method, an information receiving device and a storage medium, which are used for solving the problem that information borne on a PSCCH cannot be received efficiently.

In order to achieve the above purpose, the present application adopts the following technical scheme:

in a first aspect, there is provided an information receiving method, including: after receiving a signal to be detected for transmitting information carried by the PSCCH, and determining a pilot position in the baseband signal according to the obtained baseband signal and the plurality of types of pilot signals, the information carried by the PSCCH in the signal to be detected can be obtained 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 conforming to a first preset condition.

Wherein the information carried by the PSCCH is disposed on one of a plurality of sub-channels corresponding to the signal to be detected. One type of pilot signal is included on the sub-channel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of a plurality of types of pilot signals. The pilot position of the baseband signal is the same as the pilot position 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 of the first sub-signal and the pilot signal of the first type. The first sub-signal is a pilot signal portion of the first sub-channel at a pilot location. The first type of pilot signal is any one of a plurality of types of pilot signals.

Optionally, the specific method for determining the pilot position in the baseband signal according to the baseband signal and the pilot signals of multiple types includes: a second correlation value sequence of the second sub-signal and the pilot signal of the second type is determined. The second sub-signal and the pilot signal of the second type have the same length. The second sub-signal is located at an arbitrary position in the baseband signal. The second type of pilot signal is any one of a plurality of types of pilot signals. And determining the position of the second sub-signal on the baseband signal as the pilot position in response to the second correlation value sequence meeting a second preset condition.

Optionally, the information receiving method further includes: multiple types of pilot signals and pilot locations are stored.

Optionally, the first preset condition includes that a 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: an autocorrelation value sequence of a pilot signal of a third type is determined. The autocorrelation value sequence is used to represent the degree of autocorrelation of the pilot signal of the third type. The third type of pilot signal is any one of a plurality of types of pilot signals. And determining the peak-to-average ratio of the autocorrelation value sequence as a preset threshold.

Optionally, the information receiving method further includes: the time-frequency resources of the pilot locations in the first sub-channel are determined as the first sub-signal. And 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 a first correlation value sequence.

In a second aspect, there is provided an information receiving apparatus including: a receiving unit and an acquiring unit. And the receiving unit is used for receiving a signal to be detected for transmitting the information carried by the 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. One type of pilot signal is included on the sub-channel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of a plurality of types of pilot signals. And the acquisition unit is used for acquiring the baseband signal and the pilot signals of a plurality of types and determining the pilot positions in the baseband signal according to the baseband signal and the pilot signals of a plurality of types. The pilot position of the baseband signal is the same as the pilot position of each subchannel. The pilot position is the position of the pilot 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 the first correlation value sequence of the pilot signal of 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 to represent the degree of cross-correlation of the first sub-signal and the pilot signal of the first type. The first sub-signal is a pilot signal portion of the first sub-channel at a pilot location. The first type of pilot signal is any one of a plurality of types of pilot signals.

Optionally, the acquiring unit is specifically configured to: a second correlation value sequence of the second sub-signal and the pilot signal of the second type is determined. The second sub-signal and the pilot signal of the second type have the same length. The second sub-signal is located at an arbitrary position in the baseband signal. The second type of pilot signal is any one of a plurality of types of pilot signals. And determining the position of the second sub-signal on the baseband signal as the pilot position in response to the second correlation value sequence meeting a second preset condition.

Optionally, the information receiving apparatus further includes: and a memory cell. And a storage unit for storing a plurality of types of pilot signals and pilot positions.

Optionally, the information receiving apparatus further includes: a first determination unit. And the first determining unit is used for determining the autocorrelation value sequence of the pilot signal of the third type. The autocorrelation value sequence is used to represent the degree of autocorrelation of the pilot signal of the third type. The third type of pilot signal is any one of a 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 a preset threshold.

Optionally, the information receiving apparatus further includes: and a second determination unit. And the second determining unit is used for determining the time-frequency resource of the pilot frequency position in the first sub-channel as the first sub-signal. 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 a first correlation value sequence.

In a third aspect, there is provided an information receiving apparatus including 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 computer-executable instructions stored in the memory to cause the information receiving apparatus to perform the information receiving method as in the first aspect.

The information receiving apparatus may be a network device or may be a part of an apparatus in a network device, for example, a chip system in a network device. The system-on-a-chip is adapted to support the network device to implement the functions involved in the first aspect and any one of its possible implementations, e.g. to receive, determine, and offload data and/or information involved in the above-mentioned data processing method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

In a fourth aspect, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium comprises computer-executable instructions, which when run on a computer, cause the computer to perform the information receiving method as in the first aspect.

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

In the present application, the names of the above-described information receiving apparatuses do not constitute limitations on the devices or function modules themselves, and in actual implementations, these devices or function modules may appear under other names. Insofar as the function of each device or function module is similar to the present application, it is within the scope of the claims of the present application and the equivalents thereof.

These and other aspects of the present application will be more readily apparent from the following description.

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

based on any one of the above aspects, in the present application, after receiving a signal to be detected for transmitting information carried by a PSCCH, and determining a pilot position in the baseband signal according to the obtained baseband signal and multiple types of pilot signals, the information carried by the PSCCH in the signal to be detected may be obtained 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 conforming to a first preset condition. Wherein the information carried by the PSCCH is disposed on one of a plurality of sub-channels corresponding to the signal to be detected. One type of pilot signal is included on the sub-channel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of a plurality of types of pilot signals. The pilot position of the baseband signal is the same as the pilot position 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 of the first sub-signal and the pilot signal of the first type. The first sub-signal is a pilot signal portion of the first sub-channel at a pilot location. The first type of pilot signal is any one of a plurality of types of pilot signals.

Since the pilot signal has good correlation, there is a significant difference between the degree of auto-correlation and the degree of cross-correlation. Based on the above, the present application may determine the pilot signal inserted in the PSCCH first, and then perform analysis operations such as channel estimation and equalization, decoding of the physical control channel, and result verification based on the determined pilot signal, so as to obtain information carried on the PSCCH. Compared with the method that the information carried on the PSCCH can be obtained only by executing the resolving operation for 20 times at most in the related art, the method and the device have the advantages that the pilot signal is determined in advance, the information carried on the PSCCH can be obtained only by executing the resolving operation once later, and therefore the situation that the time for obtaining the related information by the receiving end device is too long and the computing resources are occupied is avoided. Therefore, the present application may improve the efficiency of receiving information carried on the PSCCH.

Drawings

Fig. 1 is a schematic diagram of correlation degree of pilot signals according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of an information receiving system according to an embodiment of the present application;

fig. 3 is a schematic hardware structure of an information receiving device according to an embodiment of the present application;

fig. 4 is a flowchart of a method for receiving information according to an embodiment of the present application;

Fig. 5 is a schematic diagram of a position of a pilot signal according to an embodiment of the present application;

fig. 6 is a second flowchart of an information receiving method according to an embodiment of the present application;

fig. 7 is a schematic diagram illustrating division of baseband signals according to an embodiment of the present application;

fig. 8 is a flowchart of a method for receiving information according to an embodiment of the present application;

fig. 9 is a flowchart of a method for receiving information according to an embodiment of the present application;

fig. 10 is a flowchart fifth of an information receiving method according to an embodiment of the present application;

fig. 11 is a flowchart of a method for receiving information according to an embodiment of the present application;

fig. 12 is a flowchart of a method for receiving information according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of an information receiving apparatus according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, the terms "first", "second", and the like are used to distinguish the same item or similar items having substantially the same function and effect, and those skilled in the art will understand that the terms "first", "second", and the like are not limited in number and execution order.

Furthermore, the terms "comprising" and "having" in the embodiments and claims of the present application and in the drawings are not exclusive. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules but may include other steps or modules not listed.

The following is a description of related concepts related to the embodiments of the present application for easy understanding.

1、PSCCH

In LTE-V2X, PSCCH is fixedly mapped to 5 frequency domain locations in a transmission channel, located on 5 sub-channels in the transmission channel, respectively. Each frequency domain location includes 2 consecutive Resource Blocks (RBs) in one subchannel on the transport channel. And, the PSCCH is typically associated with a physical through shared channel (physical sidelink share channel, PSSCH). Information such as the resource location and coding scheme of the PSCCH is generally indicated by the PSCCH.

When the transmitting end device needs to transmit a message, one frequency domain position needs to be randomly selected from the 5 frequency domain positions to be determined as PSCCH. After the information such as the resource location and the coding mode is indicated by the PSCCH, the PSCCH may carry a message that needs to be sent by the sending device. The PSCCH carries SCI, and the SCI indicates information such as a resource location and coding scheme of the associated PSCCH. Such information generally includes: the frequency domain resource position of primary transmission and retransmission, the time interval of primary transmission and retransmission, the modulation and coding mode, retransmission index, data priority, resource reservation period and the like.

Based on this, in LTE-V2X, when the physical layer of the receiving end device receives a message, it is generally required to perform analysis operations such as channel estimation and equalization, control channel decoding, SCI decoding, etc. on the PSCCH to obtain SCI, so as to determine information such as a resource location and a coding manner of the PSSCH, and further obtain a message sent by the transmitting end device.

2. Pilot signal

In addition to the useful signals, the signals transmitted in the wireless communication also transmit control signals that ensure the normal operation of the system. The pilot signal is one of these control signals and is typically used to ensure system synchronization, channel estimation, and the like. The pilot signal may also be referred to as a demodulation reference signal (demodulation reference signal, DMRS).

In LTE-V2X, the pilot signal of PSCCH is specified in 4 types, which is obtained by multiplying a base sequence by a Cyclic Shift (CS) at pi/4 intervals.

After determining the frequency domain position of the PSCCH, the transmitting device also needs to randomly determine the frequency domain position of one type of pilot signal inserted into the PSCCH from the 4 types of pilot signals. The pilot frequency insertion is to additionally insert a low-power line spectrum into the modulated signal spectrum so that the receiving end device can recover as a carrier synchronous signal, and the sine wave corresponding to the line spectrum is called a pilot frequency signal.

It should be noted that these 4 types of pilot signals have good auto-correlation and cross-correlation in the frequency domain. Fig. 1 is a schematic diagram of a correlation degree of a pilot signal according to an embodiment of the present application. It should be understood that the correlation degree of the two pilot signals can be easily obtained by those skilled in the art through the technical means such as the cross correlation function or the MATLAB platform, and will not be described herein.

In fig. 1, the abscissa may be used to represent the frequency domain position and the ordinate may be used to represent the correlation value. Fig. 1 (a) shows a schematic diagram of the degree of autocorrelation of the pilot signal DMRS1 of one of the 4 types of pilot signals. It can be seen that there is only one sharp peak in the correlation value sequence at the time of DMRS1 autocorrelation. Fig. 1 (b) is a schematic diagram showing the degree of cross-correlation between DMRS1 and another type of pilot signal DMRS 2. Fig. 1 (c) shows a schematic cross-correlation degree between DMRS1 and another type of pilot signal DMRS 3. Fig. 1 (d) shows a schematic cross-correlation degree between DMRS1 and another type of pilot signal DMRS 4. It can be seen that there may be multiple close peaks in the correlation value sequence of two different pilot signals at the time of cross correlation. Also, the sharp peak of DMRS1 at the time of auto-correlation is generally larger than the peak of other pilot signals at the time of cross-correlation.

Based on this, in determining whether or not a pilot signal of an unknown type is a pilot signal of the same known type, it is possible to consider determining whether or not the two pilot signals are pilot signals of the same type by determining the degree of correlation of the two pilot signals.

3、RB

In wireless communication, the smallest resource granularity in the time domain is one orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol, and the smallest resource granularity in the frequency domain is one subcarrier.

One OFDM symbol and one subcarrier may constitute one time-frequency Resource Element (RE). RE is the basic unit of resource mapping by the physical layer. All OFDM symbols in one slot in the time domain and 12 subcarriers in the frequency domain may constitute one RB. RB is a basic unit of long term evolution (long term evolution, LTE) resource scheduling.

In combination with the foregoing, after determining the frequency domain location of the PSCCH and one type of pilot signal, the transmitting device selects a specific RE as a pilot location at the frequency domain location in a manner specified in LTE-V2X, and inserts the one type of pilot signal at the pilot location.

Currently, in the LTE-V2X protocol, the receiving end device cannot know in advance the frequency domain location and the pilot signal selected by the transmitting end device. Therefore, when receiving the relevant information, the receiving end device needs to perform analysis operations such as channel estimation and equalization, decoding of the physical control channel, and result verification at each predetermined frequency domain position sequentially using the 4 kinds of pilots until the relevant information is correctly decoded.

In view of the foregoing, embodiments of the present application provide an information receiving method, in the present application,

after receiving a signal to be detected for transmitting information carried by the PSCCH, and determining a pilot position in the baseband signal according to the obtained baseband signal and the plurality of types of pilot signals, the information carried by the PSCCH in the signal to be detected can be obtained 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 conforming to a first preset condition. Wherein the information carried by the PSCCH is disposed on one of a plurality of sub-channels corresponding to the signal to be detected. One type of pilot signal is included on the sub-channel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of a plurality of types of pilot signals. The pilot position of the baseband signal is the same as the pilot position 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 of the first sub-signal and the pilot signal of the first type. The first sub-signal is a pilot signal portion of the first sub-channel at a pilot location. The first type of pilot signal is any one of a plurality of types of pilot signals.

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 apparatus 101 and an information transmitting apparatus 102. The information receiving apparatus 101 and the information transmitting apparatus 102 are communicatively connected.

In practical applications, the information receiving apparatus 101 may be communicatively connected to a plurality of information transmitting apparatuses 102.

For ease of understanding, the present application will be described by taking as an example a communication connection between the information receiving apparatus 101 and one information transmitting apparatus 102.

In one possible manner, the information receiving apparatus 101 and the information transmitting apparatus 102 may also be intelligent in-vehicle terminals. The intelligent vehicle-mounted terminal can be configured with a global positioning system (global positioning system, GPS) module, a mileage positioning module, an automobile black box module and other functional modules, and is used for realizing functions of running safety monitoring management, service quality management, intelligent centralized scheduling management, electronic stop board control management and the like aiming at a vehicle.

In one possible manner, the information receiving apparatus 101 and the information transmitting apparatus 102 may also be roadside communication devices. The road side communication equipment can be provided with a sensor module, an image and video acquisition module, a communication module and other functional modules, can be used for sensing information such as traffic state and congestion state on the road and sending the information to intelligent vehicle-mounted terminals and other equipment arranged on the vehicle.

In combination with the foregoing, in LTE-V2X, the information transmitting apparatus 102 in fig. 1 needs to carry these information by the PSSCH when transmitting these information. And the information such as the resource location and coding scheme of the PSCCH is generally indicated by the SCI in the PSCCH. In view of this, when receiving these information, the information receiving apparatus 101 generally needs to perform analysis operations such as channel estimation and equalization, control channel decoding, and SCI decoding on the PSCCH to acquire SCI, thereby determining information such as the resource location and coding scheme of the PSCCH, and further acquire these information transmitted by the information transmitting apparatus 102.

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

When the information receiving apparatus 101 and the information transmitting apparatus 102 are terminals, each of the information receiving apparatus 101 and the information transmitting apparatus 102 may be a device for providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. The wireless terminal may communicate with one or more core networks via a radio access network (radio access network, RAN). The wireless terminal may be a mobile terminal, such as a computer with a mobile terminal, or a portable, pocket, hand-held, computer-built-in mobile device that exchanges voice and/or data with a radio access network, e.g., a cell phone, tablet, notebook, 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 apparatus 101 and the information transmitting apparatus 102 are servers, each of the information receiving apparatus 101 and the information transmitting apparatus 102 may be a single server, or may be a server cluster composed of a plurality of 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, a hardware structure diagram of an information receiving apparatus 101 according to an embodiment of the present application is shown. The information receiving apparatus 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 by a bus 24.

The processor 21 is a control center of the information receiving apparatus 101, and may be one processor or a collective term of a plurality of processing elements. For example, the processor 21 may be a general-purpose central processing unit (central processingunit, CPU), or may be another general-purpose processor. Wherein the general purpose processor may be a microprocessor or any conventional processor or the like.

As one example, processor 21 may include one or more CPUs, such as CPU0 and CPU1 shown in fig. 3.

Memory 22 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), magnetic disk storage or other magnetic storage device, 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.

In a possible implementation, the memory 22 may exist separately from the processor 21, and the memory 22 may be connected to the processor 21 by a bus 24 for storing instructions or program code. The processor 21, when calling and executing instructions or program code stored in the memory 22, is capable of implementing the information receiving method provided in the following embodiments of the present application.

In another possible implementation, 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, which may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN), or the like. The communication interface 23 may include a receiving unit for receiving data, and a transmitting unit for transmitting data.

Bus 24 may be an industry standard architecture (industry standard architecture, ISA) bus, an external device interconnect (peripheral component interconnect, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 3, but not only one bus or one type of bus.

It is to be noted that the structure shown in fig. 3 does not constitute a limitation of the information receiving apparatus 101, and the information receiving apparatus 101 may include more or less components than those shown in fig. 3, or may combine some components, or may be different in arrangement of components.

Fig. 4 is a schematic flow chart of an information receiving method according to an embodiment of the present application. The information receiving method is applied to the information receiving system shown in fig. 2, and can be performed by the information receiving apparatus shown in fig. 2. For example, the hardware implementation of the information receiving apparatus may refer to the relevant content of fig. 3, which is not described herein. In some alternative implementations, the information receiving device may also be implemented by software, and the software structure of the information receiving state may refer to the related content of fig. 13, which is not described herein.

Referring to fig. 4, an information receiving method provided in an embodiment of the present application includes: S401-S403.

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

Wherein the information carried by the PSCCH is disposed on one of a plurality of sub-channels corresponding to the signal to be detected. One type of pilot signal is included on the sub-channel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of a plurality of types of pilot signals.

It should be understood that the information carried by the PSCCH may be SCI, so as to indicate information such as the resource location and coding scheme of the PSCCH. In this way, a communication message for transmitting traffic data, which the information transmitting apparatus needs to transmit to the information receiving apparatus, can be carried by the PSSCH.

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

Alternatively, the plurality of types of pilot signals may be 4 types of pilot signals corresponding to PSCCH specified in LTE-V2X.

Specifically, in order for the information receiving apparatus to receive a communication message for transmitting traffic data when the information transmitting apparatus transmits the communication message to the information receiving apparatus on the PSSCH, it is necessary to carry information (e.g., SCI) indicating the resource position and coding scheme of the PSSCH on the PSCCH in order to facilitate the reception of the communication message by the information receiving apparatus, as shown in fig. 2.

In this case, the information transmitting apparatus may randomly select one sub-channel from among 5 sub-channels on the transmission channel, determine 2 RBs on the sub-channel specified in LTE-V2X as the PSCCH, and randomly determine one type of pilot signal from among 4 types of pilot signals to insert into 2 RBs where the PSCCH is located.

Then, the information transmitting apparatus may carry information indicating the resource location, coding scheme, etc. of the PSCCH on the PSCCH, and transmit a signal to be detected for transmitting the information carried by the PSCCH on the transmission channel. Accordingly, the information receiving apparatus may receive the signal to be detected from the information transmitting apparatus.

S402, the information receiving device acquires the baseband signal and a plurality of types of pilot signals, and determines the pilot positions in the baseband signal according to the baseband signal and the plurality of 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 one possible manner, when the baseband signal and the signal to be detected are generated based on the LTE-V2X protocol, the manner and the position of inserting the pilot signal in the baseband signal are the same as the manner and the position of inserting the pilot signal in the signal to be detected. Therefore, the pilot position of the baseband signal is the same as the pilot position of each of the plurality of sub-channels corresponding to the signal to be detected.

It should be noted that, in LTE-V2X, the pilot position is fixed in the REs occupied in 5 sub-channels corresponding to the possible 5 frequency domain positions of the PSCCH, and the pilot position in each sub-channel is the same.

Specifically, in consideration of that the pilot position of the baseband signal is the same as the pilot position of each of the plurality of sub-channels corresponding to the signal to be detected, the information receiving apparatus may determine the pilot position in the PSCCH by determining the pilot position in the baseband signal when determining the specific position in which the pilot signal is inserted in the PSCCH.

In this case, in order to determine the pilot position in the baseband signal, the information receiving apparatus may acquire a plurality of types of pilot signals and baseband signals, and determine the pilot position in the baseband signal from the plurality of types of pilot signals and baseband signals.

In one implementation, the acquisition of the baseband signal may be based on a particular terminal device (e.g., computer, etc.). The specific terminal equipment can be configured with external input equipment of a computer such as a mouse, a keyboard and the like, and can also be configured with a general software radio peripheral (universal software radio peripheral, USRP) and a MATLAB platform. When the baseband signal is acquired, a worker can send a signal receiving instruction to the terminal equipment through the computer external input equipment configured by the terminal equipment. In response to a signal receiving instruction issued by a worker, the terminal equipment can firstly receive LTE-V2X air interface data of a 5915M frequency point 20M frequency band through USRP, and then directly call USRP hardware driver (USRP hardware drivers, UHD) through MATLAB platform to obtain a baseband signal.

Or, the staff can also execute the code writing operation on the MATLAB platform configured by the terminal equipment through the computer external input equipment configured by the terminal equipment, and issue a code running instruction. And responding to a code running instruction issued by a worker, and directly generating a baseband signal based on an LTE-V2X protocol by the terminal equipment through a configured MATLAB platform.

It should be appreciated that in a similar manner, the terminal device may also directly generate 4 types of pilot signals corresponding to the PSCCH based on the LTE-V2X protocol.

Next, referring to fig. 3, the staff may send an instruction to the terminal device by sending the instruction to the terminal device through the external input device of the computer configured by the terminal device. In response to an information transmission instruction issued by the staff, the terminal device may transmit the acquired baseband signal and the 4 types of pilot signals to the information receiving apparatus. Accordingly, the information receiving apparatus may receive the baseband signal and the 4 types of pilot signals through the configured communication interface and store the baseband signal and the 4 types of pilot signals in the memory.

In a possible manner, in connection with fig. 3, the information receiving apparatus is configured to directly read a plurality of types of pilot signals and baseband signals stored in advance in the memory when the plurality of types of pilot signals and baseband signals are required to be acquired.

The information receiving apparatus may then determine a pilot position in the baseband signal based on the acquired baseband signal and the plurality of types of pilot signals.

In one possible manner, the information receiving apparatus may employ a sliding correlation method in determining the pilot position in the baseband signal from the baseband signal and the plurality of types of pilot signals. I.e., each type of pilot signal is sliding correlated at all locations of the baseband signal to determine the pilot location in the baseband signal.

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

Wherein the first correlation value sequence is used to represent the degree of cross-correlation of the first sub-signal and the pilot signal of the first type. The first sub-signal is a pilot signal portion of the first sub-channel at a pilot location.

The first type of pilot signal is any one of a plurality of 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.

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

Specifically, referring to fig. 5, after receiving the signal to be detected and determining the pilot position of the baseband signal, as shown in fig. 5, since the pilot position of the baseband signal is the same as the pilot position of each of the plurality of sub-channels corresponding to the signal to be detected, the information receiving apparatus may determine, as the first sub-signal, the pilot signal portion of the frequency domain position 2 (i.e., 2 RBs specified by LTE-V2X) in the first sub-channel at the pilot position according to the pilot position of the baseband signal. The information receiving apparatus may then determine a first correlation value sequence of the first sub-signal and the pilot signal of the first type.

In response to the first correlation value sequence of the first sub-signal and the pilot signal of the first type 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 the preset threshold, the information receiving apparatus may determine that the degree of correlation between the first sub-signal and the pilot signal of the first type is autocorrelation, that is, the first sub-channel inserts the pilot signal of the first type. Further, the information receiving apparatus may determine that 2 RBs specified by LTE-V2X in the first sub-channel are PSCCHs. In this case, the information receiving apparatus may acquire information carried by the PSCCH in the signal to be detected based on the pilot signal of the first type.

In an implementation manner, when the information receiving apparatus determines the pilot position in the baseband signal according to the baseband signal and the plurality of types of pilot signals, this embodiment provides a possible implementation manner, as shown in fig. 6, including: S501-S502.

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

Wherein the second sub-signal and the pilot signal of the second type are the same length. The second sub-signal is located at an arbitrary position in the baseband signal. The second type of pilot signal is any one of a plurality of types of pilot signals.

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

In one possible manner, the information receiving apparatus may further determine a start position and an end position of the OFDM symbol in the baseband signal according to the synchronization clock sequence.

The information receiving apparatus may then process the pilot signal of the second type through a fast fourier transform (fast Fourier transform, FFT) and a window function to obtain a sliding window of the pilot signal of the second type having a length L as shown in fig. 7. The second type of pilot signal may be any one of a plurality of types of pilot signals.

Next, as shown in fig. 7, the information receiving apparatus may slide the sliding window of the pilot signal of the second type from the start position of the OFDM symbol, that is, the first portion, and determine the correlation value sequence of the sliding window and the corresponding portion on the baseband signal after each sliding. The first part is a part on the baseband signal after extending L from the starting position of the OFDM symbol, and the length of the first part is the same as that of the sliding window.

The information receiving apparatus may determine the correlation value sequence of the sliding window and any portion of the baseband signal according to the first formula. The first formula is:

wherein C is _i (θ) is a sliding window of the pilot signal of the i-th type and a correlation value sequence of an arbitrary portion. 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 portion. r is (r) ^* (x) Is the conjugation of the first moiety. P is p _i (n) is a sliding window of pilot signals of the i-th type, i=1, 2. N is the length of the pilot signal of the i-th type. It will be appreciated that the values of L and N may be the same for the length of the first portion and the sliding windowThe lengths are the same.

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

wherein,,

for the type of pilot signal when the correlation value sequence meets the maximum likelihood decision criterion, +.>

And when the correlation value sequence accords with the maximum likelihood judgment criterion, the distance between the initial position and the initial position of the baseband signal part is the distance. C (C) _i (θ) is a sliding window of the pilot signal of the i-th type and a correlation value sequence of an arbitrary portion.

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

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 value.

In one possible manner, in response to the second correlation value sequence meeting the second preset condition, the information receiving apparatus may determine that the second sub-signal on the baseband signal and the pilot signal of the second type are in an autocorrelation degree, that is, a resource location where the second sub-signal on the baseband signal is located is a location of the pilot signal. In this case, the information receiving apparatus determines the position of the second sub-signal on the baseband signal as the pilot position.

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

In an implementation manner, after determining the pilot position in the baseband signal in S402, the information receiving apparatus according to the embodiment of the method shown in fig. 4 provides a possible implementation manner, as shown in fig. 8, including: s601.

S601, the information receiving apparatus stores a plurality of types of pilot signals and pilot positions.

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

In this way, when a plurality of types of pilot signals and pilot positions need to be acquired to determine the first correlation value sequence of the first sub-signal and the first type of pilot signals, the information receiving apparatus can directly read the plurality of types of pilot signals and pilot positions stored in the memory.

In one implementation manner, 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 pilot signal of a third type.

Wherein the sequence of autocorrelation values is used to represent the degree of autocorrelation of the pilot signal of the second type. The second type of pilot signal is any one of a plurality of types of pilot signals.

Specifically, the information receiving apparatus may randomly select one type of pilot signal from among 4 types of pilot signals corresponding to PSCCH specified in LTE-V2X, determine the pilot signal as the pilot signal of the third type, and determine an autocorrelation value sequence of the pilot signal of the third type.

The autocorrelation value sequence of the pilot signal of the third type can be understood with reference to (a) in fig. 1 in conjunction with 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, in conjunction with fig. 1, one type of pilot signal has sharp peaks in the autocorrelation and other values are relatively low. While two different pilot signals may have multiple similar peaks in cross-correlation. Thus, there will be a significant difference in peak-to-average ratio of the correlation sequences in the two different cases.

Based on the above, after determining the autocorrelation value sequence of the pilot signal of the third type, the information receiving apparatus determines the average value of the autocorrelation value sequence and determines the peak value in the autocorrelation value sequence, thereby determining the ratio of the peak value and the average value of the autocorrelation value sequence as a preset threshold value.

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

S801, the information receiving device determines a time-frequency resource of a pilot frequency position in a first sub-channel as a first sub-signal.

In one possible implementation manner, 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 of the multiple sub-channels corresponding to the signal to be detected, the information receiving apparatus may determine, as the first sub-signal, the pilot signal portion of the first sub-channel at the pilot position in the frequency domain position 2 (i.e., 2 RBs specified by LTE-V2X) according to the pilot position of the baseband signal.

S802, the information receiving device performs fast Fourier transform FFT on the pilot signal of the first type to obtain time-frequency resources of the first type.

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

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

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

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

In one implementation manner, as shown in fig. 11, the information receiving apparatus may sequentially cross-correlate the 4 DMRS types specified by LTE-V2X with the time-frequency resource elements of the pilot positions in the 5 frequency domain positions specified by LTE-V2X in the signal to be detected, to obtain 20 (i.e. 4 times 5) correlation value sequences. Then, the information receiving apparatus may set a maximum likelihood decision criterion as a maximum likelihood decision criterion for the 20 correlation value sequences, where the peak-to-average ratio of the correlation value sequences is greater than or equal to a preset threshold, so as to obtain the DMRS of the target type and the target frequency domain position. The information receiving apparatus may then determine the target frequency domain location as a PSCCH and demodulate the PSCCH based on the DMRS of the target type to obtain the SCI.

In an implementation manner, in conjunction with fig. 11, as shown in fig. 12, after receiving a signal and determining a frequency domain location of a PSCCH and a type of pilot signal, the information receiving apparatus may demodulate the PSCCH based on the DMRS of the target type. Before demodulating the PSCCH, the information receiving apparatus needs to perform channel estimation and equalization, that is, zero-forcing channel estimation is performed on the PSCCH by using the DMRS of the target type, and then complete channel estimation of the PSCCH is generated based on a linear interpolation method, and channel equalization is performed.

Next, the information receiving apparatus may decode the transmission precoding and perform M-point inverse fast fourier transform (inverse fast Fourier transform, IFFT) on the OFDM symbol on the PSCCH. I.e. performing an IFFT (1, M) on the OFDM symbols on the PSCCH, M being a positive integer.

Then, the information receiving apparatus may demodulate the demodulated and precoded digital signal, and perform soft decision decoding on the constellation diagram of the digital signal on the complex plane, so as to perform error correction on the demodulated digital signal.

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

then, after correcting the demodulated digital signal to restore the original code, the information receiving apparatus may descramble the digital signal using a specific bit scrambling sequence, and restore the scrambled digital signal to the original digital signal.

Then, the information receiving apparatus can restore the scrambled information in the digital signal by interleaving the matrix.

Then, the information receiving apparatus may perform rate recovery on the restored information, that is, restore the deinterleaved digital signal into three bits output by the convolutional code encoder through the depuncture and the de-repetition process.

Then, the information receiving device can adopt 1/3 tail biting convolutional code coding to carry out Viterbi decoding on the three bits to obtain the bits before convolutional code coding.

In order to verify whether the obtained bits before the convolutional code is the correct SCI, the information receiving apparatus may use cyclic redundancy check (cyclic redundancy check, CRC) to check the bits before the convolutional code is encoded, i.e., divide the obtained bits before the convolutional code is encoded by a modulo-two division method by the primitive polynomial. If the remainder is 0, the CRC check is passed. In this case, the information receiving apparatus can determine that the resolved SCI is correct. If the remainder is not 0, it is indicated that the resulting bit before the convolutional code is encoded has a scrambling code. In this case, the information receiving apparatus can determine the resolved SCI error, i.e., PSCCH detection identification.

In this embodiment of the present application, after receiving a signal to be detected for transmitting information carried by a PSCCH, and determining a pilot position in a baseband signal according to an obtained baseband signal and a plurality of types of pilot signals, an information receiving apparatus may obtain, based on the first type of pilot signal, information carried by the PSCCH in the signal to be detected in response to a first correlation value sequence of a first sub-signal and the first type of pilot signal conforming to a first preset condition. Wherein the information carried by the PSCCH is disposed on one of a plurality of sub-channels corresponding to the signal to be detected. One type of pilot signal is included on the sub-channel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of a plurality of types of pilot signals. The pilot position of the baseband signal is the same as the pilot position 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 of the first sub-signal and the pilot signal of the first type. The first sub-signal is a pilot signal portion of the first sub-channel at a pilot location. The first type of pilot signal is any one of a plurality of types of pilot signals.

The foregoing description of the solution provided in the embodiments of the present application has been mainly presented in terms of a method. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the present application may divide the functional modules of the information receiving apparatus 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 integrated modules may be implemented in hardware or in software functional modules. Optionally, the division of the modules in the embodiments of the present application is schematic, which is merely a logic function division, and other division manners may be actually implemented.

Fig. 13 is a schematic structural diagram of an information receiving device according to an embodiment of the present application. The information receiving apparatus may be used to perform the information receiving method shown in fig. 4, 6, and 8 to 10. The information receiving apparatus shown in fig. 13 is attributed to an information receiving system including an information receiving apparatus and an information transmitting apparatus. The information receiving apparatus includes: a receiving unit 901 and an acquiring unit 902.

A receiving unit 901, configured to receive a signal to be detected for transmitting information carried by a physical through 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. One type of pilot signal is included on the sub-channel on which the information carried by the PSCCH is deployed. The one type of pilot signal is any one of a plurality of types of pilot signals. For example, in connection with fig. 4, the receiving unit 901 may be used to perform S401.

An acquiring unit 902, configured to acquire a baseband signal and a plurality of types of pilot signals, and determine a pilot position in the baseband signal according to the baseband signal and the plurality of types of pilot signals. The pilot position of the baseband signal is the same as the pilot position of each subchannel. The pilot position is the position of the pilot signal. For example, in connection with fig. 4, the acquisition unit 902 may be used to perform S402.

The obtaining unit 902 is further configured to obtain information carried by the PSCCH in the signal to be detected based on the pilot signal of the first type, in response to the first correlation value sequence of 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 to represent the degree of cross-correlation of the first sub-signal and the pilot signal of the first type. The first sub-signal is a pilot signal portion of the first sub-channel at a pilot location. The first type of pilot signal is any one of a plurality of types of pilot signals. For example, in connection with fig. 4, the acquisition unit 902 may be used to perform S403.

Optionally, the acquiring unit 902 is specifically configured to:

a second correlation value sequence of the second sub-signal and the pilot signal of the second type is determined. The second sub-signal and the pilot signal of the second type have the same length. The second sub-signal is located at an arbitrary position in the baseband signal. The second type of pilot signal is any one of a plurality of types of pilot signals. For example, in connection with fig. 6, the acquisition unit 902 may be used to perform S501.

And determining the position of the second sub-signal on the baseband signal as the pilot position in response to the second correlation value sequence meeting a second preset condition. For example, in connection with fig. 6, the acquisition unit 902 may be used to perform S502.

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

A storage unit 903 for storing a plurality of types of pilot signals and pilot positions. For example, in connection with fig. 8, the storage unit 903 may be used to perform S601.

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

A first determining unit 904, configured to determine an autocorrelation value sequence of the pilot signal of the third type. The autocorrelation value sequence is used to represent the degree of autocorrelation of the pilot signal of the third type. The third type of pilot signal is any one of a plurality of types of pilot signals. For example, in connection with fig. 9, the first determination unit 904 may be used to perform S701.

The first determining unit 904 is further configured to determine a peak-to-average ratio of the autocorrelation value sequence as a preset threshold. For example, in connection with fig. 9, the first determining unit 904 may be used to perform S702.

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

A second determining unit 905 is configured to determine a time-frequency resource of the pilot position in the first sub-channel as the first sub-signal. For example, in connection with fig. 10, the second determination unit 905 may be used to perform S801.

The second determining unit 905 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. For example, in connection with fig. 10, the second determination unit 905 may be used to perform S802.

The second determining unit 905 is further configured to determine a correlation value sequence of the first sub-signal and the first type of time-frequency resource as a first correlation value sequence. For example, in connection with fig. 10, the second determination unit 905 may be used to perform S803.

Those of skill in the art will appreciate that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these 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.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and the division of modules or units, for example, is merely a logical function division, and other manners of division are possible when actually implemented. For example, multiple units or components may be combined or may be integrated into another device, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and the parts shown as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present application should be covered in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

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:

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.