PSFCH Signal Detection Method, Apparatus, Storage Medium, and Electronic Device

Abstract

The present application provides a method, an apparatus, a storage medium, and an electronic device for detecting a physical side link feedback channel (PSFCH) signal. The method includes: determining a sum of weighted powers of a received PSFCH signal and a local NACK sequence; determining a peak phase and a peak power based on the sum of the weighted powers, determining a base power based on the sum of the weighted powers and the peak power, and determining a ratio of the peak power to the base power; determining an output weight of the PSFCH signal based on the peak phase and the ratio, and setting an output state for the PSFCH signal; and detecting the PSFCH signal based on the output weight and the output state.

Description

Technical Field

[0001] This application relates to, but is not limited to, the communication field. This application claims the priority of the patent application No. 202210808598.1 filed with the China Patent Office on July 11, 2022, and incorporates all of its content by reference into this application.

Background Art

[0002] The 3GPP (registered trademark) Sidelink communication system is widely used in V2X communication and is currently evolving from LTE Sidelink to NR Sidelink. An important development of NR Sidelink compared to LTE Sidelink is that it supports the Hybrid Automatic Repeat reQuest (HARQ) process of the Physical Sidelink Shared Channel (abbreviated as PSSCH). The transmission and reception of HARQ information between terminals are realized by the newly added PSFCH in NR Sidelink.

[0003] In the 3GPP R16 NR protocol, the Physical Sidelink Feedback Channel (PSFCH for short) in Sidelink is defined as a means for a User Equipment (UE) to feedback information to the transmitting UE indicating whether an accurate ACK or an incorrect NACK has been received after receiving the PSSCH channel, for use in HARQ retransmission. There are two transmission methods. Method 1 is that the receiving UE transmits an NACK or ACK sequence and feedbacks information on whether the received PSSCH is in error (NACK sequence) or accurately received (ACK sequence) to the transmitting UE. Method 2 is that the receiving UE transmits an NACK sequence or does not transmit any information (Not Active sequence, abbreviated as NA sequence), and feedbacks information on whether the received PSSCH is in error (NACK sequence) or accurately received (NA sequence) to the transmitting UE. Both the receiving UE and the transmitting UE perform PSFCH transmission and reception using one of the above two methods according to unified high-level signaling. Summary of the Invention Problems to be Solved by the Invention

[0004] When the Signal-to-Noise Ratio (SNR) of the received signal, that is, when the power of the input signal of the amplifier is low, there is a large randomness between the local sequence and the CIR (Channel Impulse Response) peak associated with the received Additive White Gaussian Noise (AWGN), which leads to a decrease in detection performance. In particular, when transmitting PSFCH using Method 2, since the NA sequence only contains AWGN, at low SNR, the probability of misdetection such as the transmitted NACK sequence being misdetected as the NA sequence or the NA sequence being misdetected as the NACK sequence is high.

[0005] Regarding the problem that the false detection probability of the PSFCH signal is high when the signal-to-noise ratio of the received signal is relatively low in the related art, no solution has been proposed.

[0006] This application provides a PSFCH signal detection method, apparatus, storage medium, and electronic device.

Means for Solving the Problem

[0007] According to one aspect of this application, a step of determining the sum of the weighted power of the received PSFCH signal and the local NACK sequence, determining the peak phase and peak power based on the sum of the weighted power, determining the base power based on the sum of the weighted power and the peak power, and determining the ratio of the peak power to the base power, determining the output weight of the PSFCH signal based on the peak phase and the ratio, setting an output state for the PSFCH signal, and detecting the PSFCH signal based on the output weight and the output state are included. A PSFCH signal detection method is provided. According to a further aspect of this application, a first determination module arranged to determine the sum of the weighted power of the received PSFCH signal and the local NACK sequence, determining the peak phase and peak power based on the sum of the weighted power, determining the base power based on the sum of the weighted power and the peak power, and determining the ratio of the peak power to the base power, a second determination module arranged to determine the output weight of the PSFCH signal based on the peak phase and the ratio and set an output state for the PSFCH signal, and a detection module arranged to determine the PSFCH signal based on the output weight and the output state are further provided. A PSFCH signal detection apparatus is provided.

[0008] According to a further aspect of this application, a computer-readable storage medium storing a computer program for causing a processor to execute the steps in any of the methods described herein is further provided.

[0009] According to a further aspect of the present application, there is further provided an electronic device including a memory storing a computer program and a processor installed to execute steps in any of the methods described herein when the computer program runs.

Brief Description of Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 7

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present application will be described in detail with reference to the drawings and in combination with the embodiments. It should be noted that terms such as "first", "second", etc. in the specification, claims and the above drawings of the present application are for distinguishing similar objects and should not be used to describe a specific order or sequence before and after.

[0012] The method provided by this application can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking the operation on a mobile terminal as an example, FIG. 1 is a hardware structure block diagram of the mobile terminal of the PSFCH signal detection method of this application. As shown in FIG. 1, the mobile terminal may include one or more (only one is shown in FIG. 1) processors 102 (the processor 102 may include, but is not limited to, processing devices such as a microprocessor MCU or a programmable logic device FPGA), and a memory 104 for storing data. The above mobile terminal may further include a transmission device 106 and an input / output device 108 used for communication functions. The structure shown in FIG. 1 is only a concept, and those skilled in the art can understand that it does not limit the structure of the above mobile terminal. For example, the mobile terminal may include more or fewer components than those shown in FIG. 1, or may have an arrangement different from that shown in FIG. 1.

[0013] The memory 104 is, for example, software programs and modules of application software, and may be used for storing computer programs such as computer programs corresponding to the PSFCH signal detection method of this application. The processor 102 executes the computer programs stored in the memory 104 to execute various functional applications and PSFCH signal detection processing, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include non-volatile memories, such as one or more magnetic storage devices, flash memories, or other non-volatile solid memories. In some embodiments, the memory 104 may further include a memory remotely installed with respect to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above network include, but are not limited to, the Internet, an enterprise internal network, a local area network, a mobile communication network, and combinations thereof.

[0014] The transmission device 106 is used to transmit and receive data via a network. Examples of the above network may include a wireless network provided by a communication provider of a mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, abbreviated as NIC) that can communicate with the Internet by connecting to other network devices via a base station. In one example, the transmission device 106 may be a radio frequency (RF) module for communicating with the Internet wirelessly.

[0015] This application provides a method for detecting a PSFCH signal operating in the above mobile terminal or network architecture. FIG. 2 is a flowchart based on the method for detecting a PSFCH signal of this application. As shown in FIG. 2, the flow includes the following steps S302 to S308. In step S302, the sum of the weighted powers of the received PSFCH signal and the local NACK sequence is determined.

[0016] JPEG2025522020000002.jpg48169

[0017] JPEG2025522020000003.jpg78169

[0018] In step S304, the peak phase and peak power are determined based on the sum of the weighted powers, and the base power is determined based on the sum of the weighted powers and the peak power, and the ratio of the peak power to the base power is determined.

[0019] JPEG2025522020000004.jpg88169

[0020] In step S306, the output weight of the PSFCH signal is determined based on the peak phase and the ratio, and the output state is set (determined) for the PSFCH signal. In step S308, the PSFCH signal is detected based on the output weight and the output state. In one embodiment, step S306 may include steps S1 and S2. In step S1, when the high-level signaling indicates that the PSFCH signal is a NACK sequence or an NA sequence, the output weight of the PSFCH signal is determined based on the peak phase, ratio, phase threshold of the NA sequence, and phase threshold of the NACK sequence, and an output state is set for the PSFCH signal.

[0021] In step S2, when the high-level signaling indicates that the PSFCH signal is a NACK sequence or an ACK sequence, the output weight is determined based on the peak phase, ratio, power threshold of the NACK sequence, power threshold of the NA sequence, and phase threshold of the NACK sequence, and an output state is set for the PSFCH signal.

[0022] JPEG2025522020000005.jpg185169

[0023] In this embodiment, step S308 may include steps S3081 and S3082. In step S3081, when the high-level signaling indicates that the PSFCH signal is a NACK sequence or an NA sequence, it is determined that the PSFCH signal is a NACK sequence or an NA sequence based on the output state flag1 and the output weight flag.

[0024] JPEG2025522020000006.jpg21169

[0025] Furthermore, step S3081 is a step of determining a determination threshold thD based on the output state flag1. As an example, it is determined whether the output state flag1 is equal to 2. If the determination result is YES, the determination threshold thD is determined to be the fourth predetermined value th1. If the determination result is NO, the determination threshold thD is determined to be the fifth predetermined value th2. Here, the fourth predetermined value th1 is not equal to the fifth predetermined value th2 and is a different predetermined value. And it is determined whether the output weight flag is greater than the determination threshold thD. If the determination result is YES, the PSFCH signal is determined to be a NACK sequence. If the determination result is NO, the PSFCH signal is determined to be a NA sequence. This step may include these steps.

[0026] JPEG2025522020000007.jpg35169

[0027] JPEG2025522020000008.jpg84169

[0028] JPEG2025522020000009.jpg39169

[0029] JPEG2025522020000010.jpg142169

[0030] JPEG2025522020000011.jpg81169

[0031] JPEG2025522020000012.jpg17169

[0032] When the PSFCH is transmitted using Method 2, that is, when transmitting the NACK sequence or not transmitting the sequence, it is still applied after correcting the ACK to the NA sequence based on the sequence detection result. However, such a detection method has a large randomness in the CIR peak after the local sequence and the received AWGN are associated when the received signal SNR is low. Therefore, the probability of misdetection is high, such as the transmitted NACK sequence being misdetected as the NA sequence or the NA sequence being misdetected as the NACK sequence. In the conventional method, a new cost function is introduced to reduce the misdetection probability by introducing the absolute threshold for the noise floor of the CIR peak.

[0033] JPEG2025522020000013.jpg33170

[0034] JPEG2025522020000014.jpg53169

[0035] JPEG2025522020000015.jpg53169

[0036] JPEG2025522020000016.jpg40169

[0037] The adaptive determination compares using the output weight flag and th1 when the PSFCH transmission sequence is the ACK or NACK sequence to obtain a determination that the currently received PSFCH signal is the ACK or NACK. When the PSFCH transmission sequence is the NACK or NA sequence, the fourth default value th1 or the fifth default value th2 is selected as the threshold based on the output state flag1 and compared with the output weight flag to obtain a determination that the currently received PSFCH signal is the NACK or NA.

[0038] JPEG2025522020000017.jpg38169

[0039] JPEG2025522020000018.jpg136169

[0040] JPEG2025522020000019.jpg212169

[0041] JPEG2025522020000020.jpg74169

[0042] JPEG2025522020000021.jpg50169

[0043] This application further provides a PSFCH signal detection device. FIG. 7 is a block diagram based on the PSFCH signal detection device of this application. As shown in FIG. 7, the device includes a first determination module 72 arranged to determine the sum of the weighted power of the received PSFCH signal and the local NACK sequence, a second determination module 74 arranged to determine the peak phase and peak power based on the sum of the weighted power, determine the base power based on the sum of the weighted power and the peak power, and determine the ratio of the peak power to the base power, and a third determination module 76 arranged to determine the output weight of the PSFCH signal based on the peak phase and the ratio, and set the output state for the PSFCH signal, and a detection module 78 arranged to detect the PSFCH signal based on the output weight and the output state.

[0044] In one embodiment, the third determination module 76 includes a first determination sub-module arranged to determine the output weight of the PSFCH signal based on the peak phase, the ratio, the phase threshold of the NA sequence, and the phase threshold of the NACK sequence, and set the output state for the PSFCH signal when the high-level signaling indicates that the PSFCH signal is a NACK sequence or an NA sequence, and a second determination sub-module arranged to determine the output weight of the PSFCH signal based on the peak phase, the ratio, the power threshold of the NACK sequence, the power threshold of the NA sequence, and the phase threshold of the NACK sequence, and set the output state for the PSFCH signal when the high-level signaling indicates that the PSFCH signal is a NACK sequence or an ACK sequence, and 00041.

[0045] JPEG2025522020000022.jpg47169

[0046] JPEG2025522020000023.jpg143169

[0047] JPEG2025522020000024.jpg45169

[0048] In one embodiment, the determination sub-module includes a first determination means arranged to determine thD based on the output state flag1, a first determination means for determining whether the output weight flag is greater than the determination threshold thD, and a second determination means arranged to determine that the PSFCH signal is the NACK sequence when the determination result is YES and to determine that the PSFCH signal is the NA sequence when the determination result is NO.

[0049] In one embodiment, the first determination means is further arranged to determine whether the output state flag1 is equal to 2, and when the determination result is YES, to determine that the determination threshold thD is the fourth predetermined value th1, and when the determination result is NO, to determine that the determination threshold thD is the fifth predetermined value th2, where the fourth predetermined value th1 is not equal to the fifth predetermined value th2 and is a different predetermined value.

[0050] JPEG2025522020000025.jpg47169

[0051] JPEG2025522020000026.jpg84169

[0052] JPEG2025522020000027.jpg96170

[0053] The present application further provides an electronic device including a memory storing a computer program and a processor installed to run the computer program to execute the steps in any of the above methods.

[0054] In an exemplary embodiment, the electronic device may further include a transmission device connected to the processor and an input / output device connected to the processor. Examples of device embodiments can refer to the examples described in the above embodiments and exemplary embodiments, and will not be described again here.

[0055] In the present application, the sum of the weighted power of the received PSFCH signal and the local NACK sequence is determined, the peak phase and peak power are determined based on the sum of the weighted power, the base power is determined based on the sum of the weighted power and the peak power, the ratio of the peak power to the base power is determined, the output weight of the PSFCH signal is determined based on the peak phase and the ratio, the output state is set, and the PSFCH signal is detected based on the output weight and the output state. By doing so, when the signal-to-noise ratio of the received signal in the related art is relatively low, the problem that the false detection probability of the PSFCH signal is high can be solved. Based on the output weight and output state determined by the peak phase and the ratio, the received PSFCH signal is detected, and the false detection probability of the PSFCH signal is reduced.

[0056] Obviously, each module or each step of the present application can be realized by a general-purpose computer device. These can be combined on a single computer device or distributed across a network consisting of multiple computer devices. Since these can be realized using program codes executable by the computer device, they can be stored in a storage device and executed by the computer device. In addition, in some situations, the steps shown or described can be executed in a different order than here, or these can be fabricated as each integrated circuit module respectively, or multiple modules or steps among these can be fabricated as a single integrated circuit module to be realized. Those skilled in the art should be able to understand this. Therefore, the present application is not limited to a specific combination of hardware and software.

[0057] The above is only an exemplary embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. Determining the sum of the weighted power of the received PSFCH signal and the local NACK sequence; Determining a peak phase and a peak power based on the sum of the weighted power, determining a base power based on the sum of the weighted power and the peak power, and determining a ratio of the peak power to the base power; Determining an output weight of the PSFCH signal based on the peak phase and the ratio, and setting an output state for the PSFCH signal; Detecting the PSFCH signal based on the output weight and the output state, comprising: A method for detecting a physical sidelink feedback channel (PSFCH) signal.

2. The step of determining an output weight of the PSFCH signal based on the peak phase and the ratio, and setting an output state for the PSFCH signal: When high-level signaling indicates that the PSFCH signal is a NACK sequence or an NA sequence, determining the output weight based on the peak phase, the ratio, a phase threshold of the NA sequence, and a phase threshold of the NACK sequence, and setting the output state for the PSFCH signal; When high-level signaling indicates that the PSFCH signal is a NACK sequence or an ACK sequence, determining an output weight of the PSFCH signal based on the peak phase, the ratio, a power threshold of the NACK sequence, a power threshold of the NA sequence, and a phase threshold of the NACK sequence, and setting the output state for the PSFCH signal, comprising: The method according to claim 1.

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12. A first determination module arranged to determine the sum of the weighted power of the received PSFCH signal and the local NACK sequence; A second determination module arranged to determine a peak phase and a peak power based on the sum of the weighted power, determine a base power based on the sum of the weighted power and the peak power, and determine a ratio of the peak power to the base power; A third determination module arranged to determine an output weight of the PSFCH signal based on the peak phase and the ratio, and set an output state for the PSFCH signal; A detection module arranged to detect the PSFCH signal based on the output weight and the output state, Physical side link feedback channel PSFCH signal detection device.

13. A computer-readable storage medium storing a computer program for causing the processor to execute the method according to any one of claims 1 to 11, Computer-readable storage medium.

14. A memory storing a computer program, and a processor installed so that the computer program operates to execute the method according to any one of claims 1 to 11, Electronic device.

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