Signal generating and receiving method and device

Abstract

An embodiment of the present application discloses a signal generation and reception method and device, which belongs to the field of communication technology. The signal generation method of the embodiment of the present application includes: a transmitting end obtains a first threshold, and the first threshold is related to the length of a first symbol; the transmitting end determines the length of a second symbol based on the first threshold; wherein the length of the cyclic prefix corresponding to the second symbol is not greater than the first threshold; the transmitting end generates a first signal corresponding to the first symbol based on the length of the second symbol.

Description

Technical Field

[0001] The present application belongs to the field of communication technology, and specifically relates to a signal generation and reception method and device. Background Art

[0002] When a low-power wake-up signal is introduced into a mobile cellular system, an amplitude shift keying (ASK) signal can be generated based on the orthogonal frequency division multiplexing (OFDM) signal generation structure of the Long Term Evolution (LTE) or New Radio (NR) transmitter.

[0003] The effective length of an OFDM symbol in LTE is 66.67µs, while NR includes OFDM symbols of various effective lengths. Considering the flexible support of the rate of low-power wake-up signals, it is not appropriate to always fix the length of a low-power wake-up signal symbol to the effective length or half of an OFDM symbol in LTE or NR. When the effective length of an OFDM symbol includes more than two low-power wake-up signal symbol lengths, the cyclic prefix can easily cause signal symbol detection failure. Summary of the Invention

[0004] The embodiments of the present application provide a signal generation and reception method and device, which can solve the problem of symbol detection failure of low-power wake-up signals.

[0005] In a first aspect, a signal generation method is provided, including: a transmitting end obtains a first threshold, where the first threshold is related to the length of a first symbol; the transmitting end determines the length of a second symbol based on the first threshold; wherein the length of a cyclic prefix corresponding to the second symbol is not greater than the first threshold; and the transmitting end generates a first signal corresponding to the first symbol based on the length of the second symbol.

[0006] In a second aspect, a signal receiving method is provided, including: a receiving end receives a first signal; if the duration length of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is a second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal.

[0007] In a third aspect, a signal generating device is provided, including: an acquisition module for acquiring a first threshold, wherein the first threshold is related to the length of a first symbol; a determination module for determining the length of a second symbol based on the first threshold; wherein the length of the cyclic prefix corresponding to the second symbol is not greater than the first threshold; and a generation module for generating a first signal corresponding to the first symbol based on the length of the second symbol.

[0008] In a fourth aspect, a signal receiving device is provided, including: a receiving module for receiving a first signal; if the duration length of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is a second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal.

[0009] In a fifth aspect, a communication device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0010] In a sixth aspect, a communication device is provided, comprising a processor and a communication interface, wherein the processor is used to obtain a first threshold, the first threshold being related to the length of a first symbol; determining the length of a second symbol based on the first threshold; wherein the length of a cyclic prefix corresponding to the second symbol is not greater than the first threshold; generating a first signal corresponding to the first symbol based on the length of the second symbol; the communication interface is used to receive the first signal; if the duration length of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is the second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal.

[0011] In the seventh aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0012] In the eighth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0013] In the ninth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0014] In an embodiment of the present application, a transmitting end obtains a first threshold, which is related to the length of a first symbol; the transmitting end determines the length of a second symbol based on the first threshold, and the length of the cyclic prefix corresponding to the determined second symbol is not greater than the first threshold; the transmitting end generates a first signal corresponding to the first symbol based on the length of the second symbol. In an embodiment of the present application, the length of the cyclic prefix is ​​limited by the above-mentioned first threshold, thereby determining the length of the second symbol based on the determined length of the cyclic prefix, and utilizing the generation mechanism of the second symbol to generate the first signal of the first symbol. This helps to eliminate the influence of the cyclic prefix on the detection of the first signal, and effectively improves the reliability of the detection of the first signal by the receiving end. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

[0016] Figure 2 is a schematic flow chart of a signal generation method according to an embodiment of the present application;

[0017] Figure 3 is a schematic flowchart of a signal receiving method according to an embodiment of the present application;

[0018] Figure 4 Schematic diagram of the relationship between OFDM symbol and OOK symbol length according to an embodiment of the present application;

[0019] Figure 5 Schematic diagram of the relationship between OFDM symbol and OOK symbol length according to an embodiment of the present application;

[0020] Figure 6 Schematic diagram of the relationship between OFDM symbol and OOK symbol length according to an embodiment of the present application;

[0021] Figure 7 is a schematic diagram of a specific application of the signal generation method according to an embodiment of the present application;

[0022] Figure 8 is a structural diagram of a signal generating device according to an embodiment of the present application;

[0023] Figure 9 is a structural diagram of a signal receiving device according to an embodiment of the present application;

[0024] Figure 10is a structural diagram of a communication device according to an embodiment of the present application;

[0025] Figure 11 is a schematic structural diagram of a terminal according to an embodiment of the present application;

[0026] Figure 12 It is a structural diagram of the network side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0028] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0029] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to applications other than NR system applications, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0030] Figure 1A block diagram of a wireless communication system applicable to the embodiments of the present application is shown. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR) / virtual reality (VR) device, a robot, a wearable device (Wearable Device), a vehicle-mounted device (VUE), a pedestrian terminal (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM or a self-service machine, and other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network device, a radio access network (RAN), a radio access network function, or a radio access network unit. The access network device may include a base station, a WLAN access point, or a WiFi node, etc. The base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home node B, a home evolved node B, a transmitting and receiving point (TRP), or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0031] The signal generation method provided in the embodiments of the present application is described in detail below through some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0032] like Figure 2 As shown, an embodiment of the present application provides a signal generation method 200, which can be executed by a transmitting end. In other words, the method can be executed by software or hardware installed on the transmitting end. The method includes the following steps.

[0033] S202: The transmitting end obtains a first threshold, where the first threshold is related to the length of the first symbol.

[0034] The transmitting end mentioned in each embodiment of the present application may be a network side device, and accordingly, the receiving end may be a terminal; or, the transmitting end mentioned in each embodiment of the present application may be a terminal, and accordingly, the receiving end may be a terminal or a network side device.

[0035] In various embodiments of the present application, the first symbol may be an Amplitude Shift Keying (ASK) modulation symbol or a binary On-Off Keying (OOK) modulation symbol, where OOK is a special modulation method within ASK. In various embodiments of the present application, the second symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

[0036] In an example, the first threshold is configured or predefined by a network-side device, and the first threshold is not greater than the length of the first symbol. In this step, the transmitting end can obtain the first threshold.

[0037] In another example, in this step, the transmitter may obtain the first threshold based on the length of the first symbol and a second threshold, where the second threshold is used to limit the length of a cyclic prefix (CP). For example, the transmitter may multiply the length of the first symbol by the second threshold to obtain the first threshold. For example, if the length of the first symbol is 8.33 us and the second threshold X = 0.3, the first threshold obtained in this step is: 8.33 us * 0.3 = 2.499 us.

[0038] The second threshold is used to limit the length of the cyclic prefix, and specifically can be used to limit the length of the cyclic prefix corresponding to the second symbol.

[0039] The second threshold may be configured by the network side device or predefined; wherein, the second threshold may be inversely correlated with the reliability of the communication system. For example, if the reliability requirement of the communication system is high, the second threshold configured by the network side device is 0.1; if the reliability requirement of the communication system is medium, the second threshold configured by the network side device is 0.2; if the reliability requirement of the communication system is low, the second threshold configured by the network side device is 0.3.

[0040] S204: The transmitting end determines the length of a second symbol according to the first threshold; wherein the length of the cyclic prefix corresponding to the second symbol is not greater than the first threshold.

[0041] Optionally, the transmitting end determines the length of the second symbol based on the first threshold, including: the transmitting end selects the length of one or more third symbols that meet preset conditions from the first set to obtain a second set; wherein the preset conditions include: the length of the cyclic prefix corresponding to the third symbol is not greater than the first threshold; the transmitting end selects the length of the second symbol from the second set.

[0042] In one example, the transmitter selects the length of the second symbol from the second set, including: the transmitter uses the minimum or maximum length of the symbols in the second set or any one of the sets as the length of the second symbol.

[0043] The first set mentioned above may include the effective length of one or more OFDM symbols; wherein the effective length of the OFDM symbol does not include the length of the CP, and the effective length of each OFDM symbol corresponds to the length of the CP.

[0044] The above-mentioned first set may include the effective lengths of all OFDM symbols available in the current communication system, and each OFDM symbol corresponds to the length of the CP. As an example, the first set is shown in Table 1 below, which includes the effective lengths of 5 OFDM symbols, and each OFDM symbol corresponds to the length of the CP.

[0045] Table 1 Effective length of OFDM symbol and CP length

[0046] Subcarrier spacing The effective length of an OFDM symbol CP length 15kHz 66.67us 4.69us 30kHz 33.33us 2.35us 60kHz 16.67us 1.17us 120kHz 8.33us 0.59us 240kHz 4.17us 0.29us

[0047] Optionally, the length of the second symbol is an integer multiple of the length of the first symbol, or the length of the first symbol is an integer multiple of a first length, and the first length includes: the sum of the length of the second symbol and the length of the cyclic prefix corresponding to the second symbol.

[0048] S206: The transmitting end generates a first signal corresponding to the first symbol according to the length of the second symbol.

[0049] Optionally, the transmitting end generates a first signal corresponding to the first symbol based on the length of the second symbol, including: the transmitting end adopts the following three: 1) the subcarrier spacing associated with the length of the second symbol, 2) the time domain target value of the first symbol, 3) generating at least one OFDM subcarrier of the first symbol to obtain at least one subcarrier coefficient required to generate the first symbol; the transmitting end inverse Fourier transforms the at least one subcarrier coefficient to the time domain to obtain the first signal corresponding to the first symbol, and the transformation method can be one of the inverse discrete Fourier transform (IDFT) and the inverse fast Fourier transform (IFFT).

[0050] The time domain target value of the first symbol may be a time domain discrete value of the first symbol; and the at least one OFDM subcarrier for generating the first symbol may be the number of currently available OFDM subcarriers.

[0051] In the signal generation method provided by the embodiment of the present application, the transmitting end obtains a first threshold, which is related to the length of the first symbol; the transmitting end determines the length of the second symbol based on the first threshold, and the length of the cyclic prefix corresponding to the determined second symbol is not greater than the first threshold; the transmitting end generates a first signal corresponding to the first symbol based on the second symbol. The embodiment of the present application limits the length of the cyclic prefix by the above-mentioned first threshold, thereby determining the length of the second symbol based on the determined length of the cyclic prefix, and utilizing the generation mechanism of the second symbol to generate the first signal of the first symbol. This helps to eliminate the influence of the cyclic prefix on the detection of the first signal and effectively improves the reliability of the detection of the first signal by the receiving end.

[0052] The signal generation method provided in the embodiment of the present application can eliminate the influence of the cyclic prefix generated in the multiplexed OFDM signal generation architecture on OOK symbol detection when generating a low-power wake-up signal (i.e., the first signal) in a multi-carrier manner, thereby effectively improving the reliability of low-power wake-up signal detection.

[0053] The signal generation method provided by the embodiment of the present application uses an OFDM symbol transmitter to generate a low-power wake-up signal with a flexible time domain symbol length. Specifically, the transmitter can multiply the symbol length of the low-power wake-up signal by a second threshold to obtain a certain value, namely the first threshold, and compare the first threshold with the normal cyclic prefix length associated with the value in the OFDM time domain symbol length candidate set. The OFDM time domain symbol length corresponding to the normal cyclic prefix that is not greater than the first threshold meets the condition, and all OFDM time domain symbol length values ​​that meet the condition form a second set. In the second set, a value is selected as the OFDM time domain symbol length corresponding to the low-power wake-up symbol, and the subcarrier spacing and normal cyclic prefix associated with it are obtained.

[0054] Subsequently, the transmitter obtains the frequency-domain subcarrier coefficients corresponding to the low-power wake-up symbol based on the determined OFDM time-domain symbol length and subcarrier spacing, the number of available subcarriers, and the time-domain discrete value of the first symbol. The subcarrier coefficients are inverse Fourier transformed into the time domain to obtain the low-power wake-up time-domain symbol.

[0055] The second threshold can be configured or preconfigured by the network device. Specifically, the network device can configure or preconfigure a second threshold for the terminal supporting low power consumption through the main communication module, or directly configure or preconfigure a second threshold for the low power consumption module.

[0056] Combination of the above Figure 2 The signal generation method according to the embodiment of the present application is described in detail. Figure 3 The signal receiving method according to another embodiment of the present application is described in detail. It can be understood that the description of the receiving end is the same as that of the receiving end. Figure 2 The descriptions of the sending end in the methods shown are the same or corresponding, and to avoid repetition, the relevant descriptions are appropriately omitted.

[0057] Figure 3 This is a schematic diagram of the signal receiving method implementation flow of the embodiment of the present application, which can be applied at the receiving end. Figure 3 As shown, the method 300 includes the following steps.

[0058] S302: The receiving end receives a first signal; if the duration of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is a second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal.

[0059] The signal receiving method provided in the embodiment of the present application limits the length of the cyclic prefix through the above-mentioned second threshold, which is conducive to eliminating the influence of the cyclic prefix on the detection of the first signal and effectively improving the reliability of the receiving end's detection of the first signal.

[0060] To illustrate in detail the signal generation and reception method provided in the embodiment of the present application, a specific embodiment will be described below.

[0061] In this embodiment, the low-power wake-up symbol uses OOK modulation, without encoding or spread spectrum operation. In practice, the embodiment of the present application can use the more general amplitude modulation method ASK, and can also be combined with other coding methods such as Manchester coding and FM0 coding, as well as with spread spectrum methods.

[0062] As shown in Table 2, different OOK symbol lengths correspond to different initial data rates, where the initial data rate is the original data rate without coding and spreading. When the transmitter of an OFDM signal generates a low-power wake-up signal, the effective length of an OFDM symbol can include an integer multiple of the OOK symbol length, so that compared with the method of generating an OOK signal with a single carrier, the complexity of OOK symbol decoding at the receiving end can be not increased. An OOK symbol length can also include an integer multiple of a first length, which includes the sum of the effective length of the OFDM symbol and the length of the cyclic prefix corresponding to the OFDM symbol, thereby achieving a lower data rate without increasing the complexity of the OFDM signal transmitter.

[0063] The first column in Table 2 shows the relationship between the length of an OFDM symbol excluding the cyclic prefix and the length of an OOK symbol. Here, the OFDM symbol corresponds to a subcarrier spacing of 15kHz. Specifically, L OOK Indicates the length of an OOK symbol, L OFDM,15kHz Indicates: At 15 kHz, the effective length of an OFDM symbol is the sum of the length of the cyclic prefix corresponding to the OFDM symbol.

[0064] Table 2 OOK symbol length and data rate

[0065] <![CDATA[L OOK / L OFDM,15kHz ]]> OOK symbol length Initial data rate 14 933.38us 1kbps 1 66.67us 14kbps 1 / 2 33.33us 28kbps 1 / 4 16.67us 56kbps 1 / 8 8.33us 112kbps 1 / 16 4.17us 224kbps 1 / 32 2.08us 448kbps

[0066] The effective length of an OFDM symbol, including 1 OOK symbol, is shown in the following figure: Figure 4 As shown; the schematic diagram containing more than 1 OOK symbol is as follows Figure 6 As shown in the figure, an OOK symbol contains an integer multiple of OFDM symbols (including the length of the cyclic prefix). Figure 5 shown.

[0067] In this embodiment, the length of an OOK symbol can be set to 8.33us, corresponding to an original data rate of 112kbps, and the second threshold X=0.3, to obtain a cyclic prefix threshold value (i.e., the first threshold) of 8.33us*0.3=2.499us. Therefore, the effective length of the OFDM symbol corresponding to the cyclic prefix that is not greater than the first threshold is shown in Table 3, which corresponds to the second set in the previous embodiment.

[0068] This embodiment can select 33.33us and 30kHz from the two candidates and generate an OOK signal through the OFDM signal generation architecture. Therefore, the effective length of an OFDM symbol should include 4 OOK symbols (33.33 / 8.33). Figure 7As shown, the four OOK symbol values ​​are 1010. Based on the determined subcarrier spacing of 30 kHz and the number of available subcarriers, the frequency domain coefficients for each subcarrier corresponding to the low-power wake-up symbol can be obtained. An inverse Fourier transform of the subcarrier coefficients to the time domain yields four corresponding low-power wake-up time-domain symbols. Therefore, in the time domain, each four OOK symbols can be grouped together and generated using a single OFDM symbol.

[0069] Specifically, given the subcarrier spacing, the number of available subcarriers, and the time domain symbol value, the method for determining each subcarrier coefficient can adopt the method in the prior art. When the low-power receiver detects the OOK symbol, when it detects a symbol value duration that is not greater than (1+X)*L ook and not less than L ook When , it can be considered as the effective symbol length, thus eliminating the impact of the cyclic prefix.

[0070] Table 3

[0071] Subcarrier spacing OFDM symbol length Normal CP length 30kHz 33.33us 2.35us 60kHz 16.67us 1.17us

[0072] The signal generation and reception method provided in the embodiment of the present application can eliminate the influence of the cyclic prefix generated in the multiplexed OFDM signal generation architecture on OOK symbol detection when generating a low-power wake-up signal (i.e., the first signal) in a multi-carrier manner, thereby effectively improving the reliability of low-power wake-up signal detection.

[0073] Regarding the aforementioned elimination of the influence of the cyclic prefix generated in the multiplexed OFDM signal generation architecture on OOK symbol detection, Figure 7 As shown, after a segment of the signal at the end is copied as a cyclic prefix through the limitation of the first threshold, the length of the cyclic prefix is ​​smaller than the length of an OOK symbol, which is beneficial to eliminate the influence of the cyclic prefix generated in the multiplexed OFDM signal generation architecture on OOK symbol detection.

[0074] The signal generation and reception method provided in the embodiment of the present application can be executed by a signal generation and reception device. In the embodiment of the present application, the signal generation and reception device is used as an example to illustrate the signal generation and reception method provided in the embodiment of the present application.

[0075] Figure 8 1 is a schematic diagram of the structure of a signal generating device according to an embodiment of the present application, which may correspond to the transmitting end in other embodiments. Figure 8 As shown, the apparatus 800 includes the following modules.

[0076] The acquisition module 802 may be configured to acquire a first threshold, where the first threshold is related to the length of the first symbol.

[0077] The determination module 804 may be configured to determine the length of a second symbol according to the first threshold; wherein the length of the cyclic prefix corresponding to the second symbol is not greater than the first threshold.

[0078] The generating module 806 may be configured to generate a first signal corresponding to the first symbol according to the length of the second symbol.

[0079] The signal generating device provided in an embodiment of the present application determines the length of the second symbol based on a first threshold, wherein the length of the cyclic prefix corresponding to the determined second symbol is not greater than the first threshold; and generates a first signal corresponding to the first symbol based on the second symbol. The embodiment of the present application limits the length of the cyclic prefix by the above-mentioned first threshold, thereby determining the length of the second symbol based on the determined length of the cyclic prefix, and utilizing the generation mechanism of the second symbol to generate the first signal of the first symbol. This helps to eliminate the influence of the cyclic prefix on the detection of the first signal and effectively improves the reliability of the detection of the first signal by the receiving end.

[0080] Optionally, as an embodiment, the acquisition module 802 is used to select the length of one or more third symbols that meet preset conditions from the first set to obtain a second set; wherein the preset conditions include: the length of the cyclic prefix corresponding to the third symbol is not greater than the first threshold; and the length of the second symbol is selected from the second set.

[0081] Optionally, as an embodiment, the acquisition module 802 is configured to use the minimum or maximum length of the symbols in the second set or any one of the lengths in the set as the length of the second symbol.

[0082] Optionally, as an embodiment, the first set includes the effective length of one or more OFDM symbols; wherein the effective length of the OFDM symbol does not include the length of the cyclic prefix, and the effective length of each OFDM symbol corresponds to the length of the cyclic prefix.

[0083] Optionally, as an embodiment, the length of the second symbol is an integer multiple of the length of the first symbol; or, the length of the first symbol is an integer multiple of the first length, and the first length includes the sum of the length of the second symbol and the length of the cyclic prefix corresponding to the second symbol.

[0084] Optionally, as an embodiment, the acquisition module 802 is configured to obtain the first threshold according to the length of the first symbol and a second threshold; wherein the second threshold is used to limit the length of the cyclic prefix.

[0085] Optionally, as an embodiment, the second threshold is configured or predefined by a network-side device.

[0086] Optionally, as an embodiment, the first threshold is configured or predefined by a network-side device, and the first threshold is not greater than the length of the first symbol.

[0087] Optionally, as an embodiment, the first symbol is an ASK modulation symbol or an OOK modulation symbol, and / or the second symbol is an OFDM symbol.

[0088] Optionally, as an embodiment, the generation module 806 is used to use the subcarrier spacing associated with the length of the second symbol and the time domain target value of the first symbol to generate at least one OFDM subcarrier of the first symbol, and obtain at least one subcarrier coefficient required to generate the first symbol; and inverse Fourier transform the at least one subcarrier coefficient into the time domain to obtain a first signal corresponding to the first symbol.

[0089] According to the device 800 of the embodiment of the present application, the process of the method 200 corresponding to the embodiment of the present application can be referred to, and the various units / modules in the device 800 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes in the method 200, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0090] The signal generating and receiving device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal, or it can be other devices other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0091] Figure 9 FIG is a structural diagram of a signal receiving device according to an embodiment of the present application, which may correspond to a receiving end in other embodiments. Figure 9 As shown, the apparatus 900 includes the following modules.

[0092] The receiving module 902 can be used to receive a first signal; if the duration of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is a second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal.

[0093] The signal receiving device provided in the embodiment of the present application limits the length of the cyclic prefix through the above-mentioned second threshold, which is conducive to eliminating the influence of the cyclic prefix on the detection of the first signal and effectively improving the reliability of the receiving end's detection of the first signal.

[0094] According to the device 900 of the embodiment of the present application, the process of the method 300 corresponding to the embodiment of the present application can be referred to, and the various units / modules in the device 900 and the above-mentioned other operations and / or functions are respectively for implementing the corresponding processes in the method 300, and can achieve the same or equivalent technical effects. For the sake of brevity, they will not be repeated here.

[0095] The signal generating and receiving device provided in the embodiment of the present application can achieve Figures 2 to 7 The various processes implemented by the method embodiment achieve the same technical effect and are not described here again to avoid repetition.

[0096] Optional, such as Figure 10 As shown, an embodiment of the present application further provides a communication device 1000, including a processor 1001 and a memory 1002, wherein the memory 1002 stores a program or instruction that can be run on the processor 1001. For example, when the communication device 1000 is a transmitting end, the program or instruction is executed by the processor 1001 to implement the various steps of the above-mentioned signal generation method embodiment and can achieve the same technical effect. When the communication device 1000 is a receiving end, the program or instruction is executed by the processor 1001 to implement the various steps of the above-mentioned signal receiving method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0097] An embodiment of the present application also provides a terminal, including a processor and a communication interface, the processor is used to obtain a first threshold, the first threshold is related to the length of the first symbol; determine the length of the second symbol according to the first threshold; wherein the length of the cyclic prefix corresponding to the second symbol is not greater than the first threshold; generate a first signal corresponding to the first symbol according to the length of the second symbol; the communication interface is used to receive the first signal; if the duration length of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is the second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal. This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to this terminal embodiment and can achieve the same technical effect. Specifically, Figure 11 A schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0098] The terminal 1100 includes but is not limited to: a radio frequency unit 1101, a network module 1102, an audio output unit 1103, an input unit 1104, a sensor 1105, a display unit 1106, a user input unit 1107, an interface unit 1108, a memory 1109 and at least some of the components of the processor 1110.

[0099] Those skilled in the art will understand that the terminal 1100 may also include a power supply (such as a battery) to power each component, and the power supply may be logically connected to the processor 1110 through a power management system, thereby implementing functions such as charging, discharging, and power consumption management through the power management system. Figure 11 The terminal structure shown in the figure does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently, which will not be repeated here.

[0100] It should be understood that in an embodiment of the present application, the input unit 1104 may include a graphics processing unit (GPU) 11041 and a microphone 11042, and the graphics processor 11041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 1107 includes a touch panel 11071 and at least one of other input devices 11072. The touch panel 11071 is also called a touch screen. The touch panel 11071 may include two parts: a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and an operating stick, which will not be repeated here.

[0101] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 1101 may transmit the data to the processor 1110 for processing. Furthermore, the RF unit 1101 may send uplink data to the network-side device. Typically, the RF unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0102] The memory 1109 can be used to store software programs or instructions and various data. The memory 1109 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 1109 may include a volatile memory or a non-volatile memory, or the memory 1109 may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct RAM bus random access memory (DRRAM). The memory 1109 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0103] Processor 1110 may include one or more processing units. Optionally, processor 1110 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 1110.

[0104] Among them, the radio frequency unit 1101 can be used to receive a first signal; if the duration of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is a second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal.

[0105] Processor 1110 can be used to obtain a first threshold, where the first threshold is related to the length of a first symbol; determine the length of a second symbol based on the first threshold; wherein the length of a cyclic prefix corresponding to the second symbol is not greater than the first threshold; and generate a first signal corresponding to the first symbol based on the length of the second symbol.

[0106] The terminal provided in the embodiment of the present application can eliminate the influence of the cyclic prefix generated in the multiplexed OFDM signal generation architecture on OOK symbol detection when generating a low-power wake-up signal (i.e., the first signal) in a multi-carrier manner, thereby effectively improving the reliability of low-power wake-up signal detection.

[0107] The terminal 1100 provided in the embodiment of the present application can also implement the various processes of the above-mentioned signal generation and reception method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0108] An embodiment of the present application also provides a network-side device, including a processor and a communication interface, the processor being used to obtain a first threshold, the first threshold being related to the length of a first symbol; determining the length of a second symbol based on the first threshold; wherein the length of a cyclic prefix corresponding to the second symbol is not greater than the first threshold; generating a first signal corresponding to the first symbol based on the length of the second symbol; the communication interface being used to receive the first signal; if the duration length of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; wherein X is the second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal.

[0109] This network side device embodiment corresponds to the above-mentioned network side device method embodiment. Each implementation process and implementation method of the above-mentioned method embodiment can be applied to this network side device embodiment and can achieve the same technical effect.

[0110] Specifically, the embodiment of the present application also provides a network side device. Figure 12 As shown, network-side device 1200 includes an antenna 121, a radio frequency device 122, a baseband device 123, a processor 124, and a memory 125. Antenna 121 is connected to radio frequency device 122. In the uplink direction, radio frequency device 122 receives information via antenna 121 and sends the received information to baseband device 123 for processing. In the downlink direction, baseband device 123 processes the information to be transmitted and sends it to radio frequency device 122. Radio frequency device 122 processes the received information and then sends it through antenna 121.

[0111] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 123 , which includes a baseband processor.

[0112] The baseband device 123 may include, for example, at least one baseband board on which a plurality of chips are arranged, such as Figure 12 As shown, one of the chips is, for example, a baseband processor, which is connected to the memory 125 via a bus interface to call the program in the memory 125 to execute the network device operations shown in the above method embodiment.

[0113] The network side device may further include a network interface 126, which is, for example, a common public radio interface (CPRI).

[0114] Specifically, the network side device 1200 of the embodiment of the present invention further includes: instructions or programs stored in the memory 125 and executable on the processor 124, and the processor 124 calls the instructions or programs in the memory 125 to execute. Figure 9 The methods executed by the modules shown achieve the same technical effects, so they will not be described here to avoid repetition.

[0115] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned signal generation and receiving method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0116] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0117] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned signal generation and reception method embodiments, and can achieve the same technical effects. To avoid repetition, they will not be repeated here.

[0118] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0119] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned signal generation and reception method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0120] An embodiment of the present application also provides a signal generation and reception system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the signal generation and reception method described above, and the network side device can be used to execute the steps of the signal generation and reception method described above.

[0121] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0122] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0123] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A signal generation method, characterized in that: include: The transmitting end obtains a first threshold, where the first threshold is related to the length of the first symbol; The transmitting end determines the length of the second symbol according to the first threshold; wherein the length of the cyclic prefix corresponding to the second symbol is not greater than the first threshold; The transmitting end generates a first signal corresponding to the first symbol according to the length of the second symbol; The transmitting end determining the length of the second symbol according to the first threshold includes: The transmitting end selects the length of one or more third symbols that meet a preset condition from the first set to obtain a second set; wherein the preset condition includes: the length of the cyclic prefix corresponding to the third symbol is not greater than the first threshold; The transmitting end selects the length of the second symbol from the second set; The transmitting end generates a first signal corresponding to the first symbol according to the length of the second symbol, including: The transmitting end uses the subcarrier spacing associated with the length of the second symbol and the time domain target value of the first symbol to generate at least one OFDM subcarrier of the first symbol, and obtains at least one subcarrier coefficient required to generate the first symbol; The transmitting end performs an inverse Fourier transform of the at least one subcarrier coefficient into a time domain to obtain a first signal corresponding to the first symbol; The first symbol is an amplitude shift keying (ASK) modulation symbol or a binary on / off keying (OOK) modulation symbol; the second symbol is an OFDM symbol; and the first signal is a low-power wake-up signal. The first set includes the effective length of one or more orthogonal frequency division multiplexing (OFDM) symbols; wherein the effective length of the OFDM symbol does not include the length of the cyclic prefix, and the effective length of each OFDM symbol corresponds to the length of the cyclic prefix.

2. The method according to claim 1, characterized in that The transmitting end selecting the length of the second symbol from the second set includes: The transmitting end uses the minimum or maximum length of the symbols in the second set or any one of the sets as the length of the second symbol.

3. The method according to claim 1, characterized in that The length of the second symbol is an integer multiple of the length of the first symbol; or, The length of the first symbol is an integer multiple of a first length, where the first length includes the sum of the length of the second symbol and the length of a cyclic prefix corresponding to the second symbol.

4. The method according to claim 1, wherein The transmitting end obtaining the first threshold includes: The transmitting end obtains the first threshold according to the length of the first symbol and a second threshold; wherein the second threshold is used to limit the length of the cyclic prefix.

5. The method according to claim 4, characterized in that The second threshold is configured or predefined by the network side device.

6. The method according to claim 1, wherein The first threshold is configured or predefined by a network-side device, and the first threshold is not greater than the length of the first symbol.

7. A signal receiving method, characterized in that: include: The receiving end receives the first signal; If the duration of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; Wherein, X is a second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal; Among them, the first symbol is an amplitude shift keying (ASK) modulation symbol or a binary on / off keying (OOK) modulation symbol; and the first signal is a low-power wake-up signal.

8. A signal generating device, characterized in that: include: an acquisition module, configured to acquire a first threshold, where the first threshold is related to a length of the first symbol; a determining module, configured to determine a length of a second symbol according to the first threshold; wherein the length of a cyclic prefix corresponding to the second symbol is not greater than the first threshold; a generating module, configured to generate a first signal corresponding to the first symbol according to a length of the second symbol; Wherein, the acquisition module is used to: Selecting one or more third symbol lengths that meet a preset condition from the first set to obtain a second set; wherein the preset condition includes: a length of a cyclic prefix corresponding to the third symbol is not greater than the first threshold; selecting a length of the second symbol from the second set; The generating module is used to: generating at least one OFDM subcarrier of the first symbol by using the subcarrier spacing associated with the length of the second symbol and the time domain target value of the first symbol, and obtaining at least one subcarrier coefficient required to generate the first symbol; Performing an inverse Fourier transform of the at least one subcarrier coefficient into a time domain to obtain a first signal corresponding to the first symbol; The first symbol is an ASK modulation symbol or an OOK modulation symbol; the second symbol is an OFDM symbol; and the first signal is a low-power wake-up signal; The first set includes the effective length of one or more OFDM symbols; wherein the effective length of the OFDM symbol does not include the length of the cyclic prefix, and the effective length of each OFDM symbol corresponds to the length of the cyclic prefix.

9. The device according to claim 8, characterized in that The acquisition module is configured to use the minimum or maximum length of the symbols in the second set or any one of the set as the length of the second symbol.

10. The device according to claim 8, characterized in that The length of the second symbol is an integer multiple of the length of the first symbol; or, The length of the first symbol is an integer multiple of a first length, where the first length includes the sum of the length of the second symbol and the length of a cyclic prefix corresponding to the second symbol.

11. The device according to claim 8, characterized in that The acquisition module is configured to obtain the first threshold according to the length of the first symbol and a second threshold; wherein the second threshold is used to limit the length of the cyclic prefix.

12. The device according to claim 11, characterized in that The second threshold is configured or predefined by the network side device.

13. The device according to claim 8, characterized in that The first threshold is configured or predefined by a network-side device, and the first threshold is not greater than the length of the first symbol.

14. A signal receiving device, characterized in that: include: A receiving module, configured to receive a first signal; If the duration of a symbol value is not greater than (1+X)*L and not less than L, it is considered to be a valid symbol length; Wherein, X is a second threshold, the second threshold is used to limit the length of the cyclic prefix, L is the length of the first symbol, and the first symbol corresponds to the first signal; Among them, the first symbol is an amplitude shift keying (ASK) modulation symbol or a binary on / off keying (OOK) modulation symbol; and the first signal is a low-power wake-up signal.

15. A communication device, characterized in that: The device comprises a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the signal generating method according to any one of claims 1 to 6 are implemented, or the steps of the signal receiving method according to claim 7 are implemented.

16. A readable storage medium, characterized in that The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the signal generating method according to any one of claims 1 to 6 are implemented, or the steps of the signal receiving method according to claim 7 are implemented.

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