WO2021082008A1 - 符号处理的方法与装置 - Google Patents
符号处理的方法与装置 Download PDFInfo
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- WO2021082008A1 WO2021082008A1 PCT/CN2019/115142 CN2019115142W WO2021082008A1 WO 2021082008 A1 WO2021082008 A1 WO 2021082008A1 CN 2019115142 W CN2019115142 W CN 2019115142W WO 2021082008 A1 WO2021082008 A1 WO 2021082008A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/08—Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
Definitions
- This application relates to the field of communications, and in particular to a method and device for symbol processing.
- the guard interval can remove the inter-symbol interference (ISI) between adjacent symbols;
- the guard interval converts the linear convolution of the channel and the transmitted symbol into a cycle of the channel and the transmitted symbol Convolution, which allows the symbol receiver to use frequency domain equalization to eliminate channel multipath effects.
- ISI inter-symbol interference
- a cyclic prefix is used as a guard interval between symbols.
- the cyclic prefix is a cyclic structure formed by copying a piece of data after a data symbol (or called the tail) to the front (or called the head) of the symbol.
- cyclic prefixes of the same length are configured for different users.
- the current technology chooses to use a cyclic prefix length greater than the maximum multipath delay of users with large delays as the unified cyclic prefix. length. But for users with small delays, a too long cyclic prefix will cause unnecessary bandwidth overhead or loss of transmission rate.
- the present application provides a method and device for symbol processing, which can realize flexible configuration of the guard interval between symbols without relying on the length of the cyclic prefix.
- a method for symbol processing includes: generating a first transmission symbol in a transmission symbol sequence, where the first transmission symbol and the second transmission symbol have the same first symbol component, and the first symbol component is in the first transmission symbol.
- the starting position in a transmission symbol is the starting position of the first transmission symbol
- the starting position of the first symbol component in the second transmission symbol is the position where the cyclic prefix of the second transmission symbol is intercepted
- the second transmission symbol is and
- the next transmission symbol adjacent to the first transmission symbol, the first transmission symbol and the second transmission symbol both have a cyclic prefix; the first transmission symbol is sent.
- the receiving end determines a first reception window for receiving the first transmission symbol, and adjusts the time of the first reception window, so that the first reception window can receive the first transmission symbol completely; using the adjusted first reception The window receives the first transmitted symbol.
- the interference caused by the multipath effect can be reduced or overcome.
- the length of the first symbol component can be increased to reduce or overcome the interference caused by the multipath effect.
- increasing the length of the first symbol component can increase the adjustment time of the reception window of the first transmission symbol accordingly, so that the reception window of the first transmission symbol does not contain other components.
- the symbol is transmitted, and the first transmitted symbol can be completely received within the receiving window of the first transmitted symbol, so that the interference caused by the multipath effect can be reduced or overcome.
- this application can reduce or overcome the interference caused by multipath effects without relying on the length of the cyclic prefix, this application can flexibly implement the guard interval between symbols based on the needs of users with different channel conditions. length.
- This application does not limit the manner in which the receiving end receives the first transmitted symbol.
- the receiving end can determine the way of receiving the first transmitted symbol according to application requirements.
- the first transmission symbol and the second transmission symbol may represent any two adjacent transmission symbols in the transmission symbol sequence. That is, the first transmission symbol may represent the previous one of any two adjacent transmission symbols in the transmission symbol sequence.
- the first transmission symbol represents the first transmission symbol in the transmission symbol sequence. That is, the first transmission symbol and the second transmission symbol may represent the first transmission symbol and the second transmission symbol in the transmission symbol sequence.
- the method further includes: generating a third transmission symbol in the transmission symbol sequence, the third transmission symbol and the fourth transmission symbol having the same second symbol component ,
- the end position of the second symbol component in the third transmission symbol is the position of the intercepting cyclic prefix of the third transmission symbol
- the end position of the second symbol component in the fourth transmission symbol is the end position of the fourth transmission symbol
- the fourth The transmission symbol is the previous transmission symbol adjacent to the third transmission symbol, and both the third transmission symbol and the fourth transmission symbol have a cyclic prefix; the third transmission symbol is sent.
- the guard interval between symbols can also be flexibly set without relying on the CP length.
- the transmission symbols provided in this application can support multiplexing (frequency, space and time) between users with different subcarrier spacing and/or CP types. .
- the fourth transmission symbol and the third transmission symbol may represent any two adjacent transmission symbols in the transmission symbol sequence. That is, the third transmission symbol may represent the latter of any two adjacent transmission symbols in the transmission symbol sequence.
- the third transmission symbol may be the same transmission symbol as the first transmission symbol.
- the first transmission symbol and the second transmission symbol also have the same second symbol component
- the end position of the second symbol component in the first transmission symbol is the end position of the first transmission symbol
- the second symbol component is in the first transmission symbol.
- the end position in the second transmission symbol is the position where the CP of the second transmission symbol is intercepted.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- At least one sub-transmission symbol in the transmission symbol sequence is a channel demodulation reference signal.
- generating the first transmit symbol in the transmit symbol sequence includes: obtaining a plurality of complex symbols; dividing the plurality of complex symbols into a plurality of sets, where: Each set corresponds to one transmit symbol, and the multiple sets include a first set corresponding to the first transmit symbol and a second set corresponding to the second transmit symbol; the first set and the second set are copied, so that the first set and the first set There are partially identical complex symbols between the two sets; the first transmitted symbol is generated based on the first set.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol, wherein when the first transmission symbol is not a transmission sequence When the first symbol is transmitted, the cyclic prefix of the first transmitted symbol is added before the discrete Fourier transform DFT is performed on the first set.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol, wherein when the first transmission symbol is a transmission sequence When the first symbol is transmitted, the cyclic prefix of the first symbol is added after the discrete Fourier transform DFT is performed on the first set.
- a method for symbol processing comprising: determining a first reception window for receiving a first transmission symbol in a transmission symbol sequence, the first transmission symbol and the second transmission symbol having the same first symbol Component, the starting position of the first symbol component in the first transmission symbol is the starting position of the first transmission symbol, and the starting position of the first symbol component in the second transmission symbol is the truncated cyclic prefix of the second transmission symbol Position, the second transmit symbol is the next transmit symbol adjacent to the first transmit symbol, and both the first transmit symbol and the second transmit symbol have a cyclic prefix; adjust the time of the first receive window so that the first receive window can be completely received The first transmission symbol; the first transmission symbol is received using the adjusted first reception window.
- the interference caused by the multipath effect can be reduced or overcome.
- the length of the first symbol component can be increased to reduce or overcome the interference caused by the multipath effect.
- increasing the length of the first symbol component can increase the adjustment time of the reception window of the first transmission symbol accordingly, so that the reception window of the first transmission symbol does not contain other components.
- the symbol is transmitted, and the first transmitted symbol can be completely received within the receiving window of the first transmitted symbol, so that the interference caused by the multipath effect can be reduced or overcome.
- this application can reduce or overcome the interference caused by multipath effects without relying on the length of the cyclic prefix, this application can flexibly implement the guard interval between symbols based on the needs of users with different channel conditions. length.
- This application does not limit the manner in which the receiving end receives the first transmitted symbol.
- the receiving end can determine the way of receiving the first transmitted symbol according to application requirements.
- adjusting the time of the first receiving window includes: moving the time of the first receiving window back by a first step, and the first step is not greater than the first The length of the symbol component.
- the first transmission symbol is the first transmission symbol of the transmission symbol sequence.
- the method further includes: determining a third receiving window for receiving the third transmit symbol in the transmit symbol sequence, the third transmit symbol and the fourth transmit The symbols have the same second symbol component, the end position of the second symbol component in the third transmission symbol is the position of the intercepted cyclic prefix of the third transmission symbol, and the end position of the second symbol component in the fourth transmission symbol is the fourth The end position of the transmission symbol, the fourth transmission symbol is the previous transmission symbol adjacent to the third transmission symbol, and both the third transmission symbol and the fourth transmission symbol have a cyclic prefix; the third transmission symbol is received using the third reception window.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- At least one sub-transmission symbol in the transmission symbol sequence is a channel demodulation reference signal.
- a method for symbol processing comprising: generating a first sub-transmission symbol in a transmission symbol sequence, wherein the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol ; Send the first sub-transmission symbol.
- the first sub-transmission symbol and the second sub-transmission symbol have the same first symbol component
- the start position of the first symbol component in the first sub-transmission symbol is the start position of the first transmission symbol
- the start position in the second sub-transmission symbol is the position where the cyclic prefix of the second transmission symbol is intercepted
- the second sub-transmission symbol is the next transmission symbol adjacent to the first sub-transmission symbol
- the first sub-transmission symbol is the same as the Both sub-transmission symbols have a cyclic prefix. and / or
- the first sub-transmission symbol and the third sub-transmission symbol have the same second symbol component, and the end position of the second symbol component in the first sub-transmission symbol is the position where the cyclic prefix of the first sub-transmission symbol is intercepted, and the second symbol component
- the end position in the third sub-transmission symbol is the end position of the third sub-transmission symbol
- the third sub-transmission symbol is the previous transmission symbol adjacent to the first sub-transmission symbol
- the first sub-transmission symbol and the third sub-transmission The symbols all have a cyclic prefix.
- the interference caused by the multipath effect can be reduced or overcome.
- the third transmit symbol and the previous transmit symbol adjacent to it have the same second symbol component, it is possible to flexibly set the guard interval between symbols without relying on the CP length.
- the guard interval of each sub-transmission symbol in the transmission symbol sequence can be flexibly set.
- the first sub-transmission symbol is the first sub-transmission symbol of the transmission symbol sequence.
- the first sub-transmission symbol when the first sub-transmission symbol is not the first sub-transmission symbol of the transmission sequence, the first sub-transmission symbol does not include the first symbol component.
- generating the first sub-transmission symbol in the transmission symbol sequence includes: obtaining multiple complex symbols; dividing the multiple complex symbols into multiple sets, where , Each set corresponds to one transmission symbol, and the multiple sets include a first set corresponding to the first transmission symbol and a second set corresponding to the second transmission symbol; the first set and the second set are copied, so that the first set and The second set has partially identical complex symbols; the first sub-transmission symbol is generated based on the first set.
- the cyclic prefix of the first sub-transmission symbol is used to discretize the first set.
- the Fourier transform was added before DFT.
- the cyclic prefix of the first sub-transmission symbol is used for discretizing the first set. Added after Fourier transform DFT.
- a symbol processing device is provided, and the communication device is used to execute the method provided in the first aspect, the second aspect, or the third aspect.
- the device may include a module for executing the method provided in the first aspect, the second aspect, or the third aspect.
- a communication device in a fifth aspect, includes a processor coupled with a memory, the memory is used to store a computer program or instruction, and the processor is used to execute the computer program or instruction stored in the memory, so that the first aspect , The method in the second or third aspect is executed.
- the processor is used to execute a computer program or instruction stored in the memory, so that the communication device executes the method in the first aspect, the second aspect, or the third aspect.
- the communication device includes one or more processors.
- the communication device may further include a memory coupled with the processor.
- the communication device may include one or more memories.
- the memory can be integrated with the processor or provided separately.
- the communication device may also include a transceiver.
- a chip in a sixth aspect, includes a processing module and a communication interface, the processing module is used to control the communication interface to communicate with the outside, and the processing module is also used to implement the method provided in the first, second, or third aspect .
- a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, the computer realizes the method provided in the first, second, or third aspect.
- An eighth aspect provides a computer program product containing instructions that when executed by a computer cause the computer to implement the method provided by the first aspect, the second aspect, or the third aspect.
- this application makes it possible to reduce or overcome interference caused by multipath effects without relying on the length of the cyclic prefix by making two adjacent transmitted symbols have partially the same symbol components. Therefore, this application The length of the guard interval between symbols can be flexibly realized based on the needs of users with different channel conditions.
- Figures 1 and 2 are schematic diagrams of using a cyclic prefix (CP) as a guard interval between symbols;
- CP cyclic prefix
- Fig. 3 is a schematic flowchart of a method for symbol processing according to an embodiment of the present application
- FIG. 5 is another schematic flowchart of a symbol processing method according to an embodiment of the present application.
- FIG. 6 is another schematic diagram of the time domain structure of transmitted symbols in an embodiment of this application.
- FIG. 7 is another schematic diagram of the time domain structure of transmitted symbols in an embodiment of this application.
- FIG. 8 is a schematic diagram of a transmission symbol sequence obtained based on processing of a single transmission symbol
- FIG. 9, FIG. 10, and FIG. 11 are basic flowcharts of generating transmission symbols in an embodiment of this application.
- FIG. 12 is a schematic flowchart of a method for generating transmission symbols according to an embodiment of the present application.
- FIG. 13 is another schematic flowchart of a method for generating transmission symbols according to an embodiment of the present application.
- FIG. 14 is a schematic diagram of the correspondence between sets and transmitted symbols without performing cyclic shift in an embodiment of the application.
- 15 is a schematic diagram of the correspondence between sets and transmitted symbols in the case of performing cyclic shift in an embodiment of the application;
- FIG. 16 is a schematic diagram of another process of generating transmission symbols in an embodiment of this application.
- FIG. 17 is a schematic diagram of performing a copy operation on multiple sets in an embodiment of the application.
- FIG. 19 is another schematic diagram of the time domain structure of the transmitted symbol in an embodiment of this application.
- FIG. 20 is another schematic diagram of the time domain structure of transmitted symbols in an embodiment of this application.
- FIG. 21 is a schematic block diagram of a symbol processing apparatus provided by an embodiment of the application.
- FIG. 22 is a schematic block diagram of a symbol processing apparatus provided by an embodiment of this application.
- FIG. 23 is another schematic block diagram of a symbol processing apparatus provided by an embodiment of this application.
- FIG. 24 is another schematic block diagram of a symbol processing apparatus provided by an embodiment of this application.
- FIG. 25 is still another schematic block diagram of a symbol processing apparatus provided by an embodiment of this application.
- FIG. 26 is a schematic block diagram of a terminal device according to an embodiment of the application.
- FIG. 27 is a schematic block diagram of a network device provided by an embodiment of this application.
- guard intervals can be used to resist the multipath effect of the channel, such as cyclic prefix (CP), unique word (UW) and zero tail (ZT), etc.
- CP cyclic prefix
- UW unique word
- ZT zero tail
- Single carrier waveforms include, but are not limited to, discrete fourier transformation-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveforms, single carrier quadrature amplitude modulation (Single carrier-quadrature) amplitude modulation, SC-QAM) waveform.
- DFT-s-OFDM discrete fourier transformation-spread-orthogonal frequency division multiplexing
- SC-QAM single carrier quadrature amplitude modulation
- This application relates to a cyclic prefix as a guard interval between symbols.
- the implementation of the cyclic prefix as the guard interval between symbols is to copy the sampling points (also referred to as symbol components) at the end of a transmitted symbol to before the start of the transmitted symbol. As shown in Figure 1.
- Figure 1 is a schematic diagram of the time domain structure of a cyclic prefix (hereinafter referred to as CP) as a guard interval between symbols.
- the CP of the transmission symbol 1 refers to a cyclic structure formed before the symbol components of a section of the transmission symbol 1 from the position where the CP is intercepted to the end position are copied to the start part of the transmission symbol 1.
- the CP of the transmission symbol 2 refers to a cyclic structure formed by copying a section of symbol components from the position where the CP is intercepted to the end position in the transmission symbol 2 to the front of the transmission symbol 2.
- the transmission symbol 1 and the transmission symbol 2 shown in FIG. 1 are two adjacent transmission symbols before and after the transmission symbol. Among them, the CP of transmission symbol 2 can be used as a guard interval between transmission symbol 1 and transmission symbol 2, and the CP of transmission symbol 1 can be used as a protection between transmission symbol 1 and the previous transmission symbol (not shown in Figure 1) interval.
- ISI inter-symbol interference
- ICI inter-channel interference
- the cyclic prefix needs to meet the following two conditions.
- condition 1) If condition 1) is met, ISI can be removed.
- the cyclic prefix needs to ensure that the transmitted symbol can be completely received within the receiving window of the transmitted symbol.
- condition 2 If condition 2) is met, ICI can be removed.
- the receiving window of a transmitted symbol contains the complete waveform of the transmitted symbol, so that after the transmitted symbol reaches the receiving end through multipath channel transmission, the linear convolution of the transmitted symbol and the channel is converted into the transmitted symbol and the channel. Circular convolution, so that the receiver can use frequency domain equalization to eliminate the multipath effect of the channel.
- Figure 2 shows a schematic diagram of received signals under two channel conditions.
- Figure 2 only shows a schematic diagram of the first path and the maximum delay path (corresponding to two channel conditions). It should be understood that FIG. 2 is only for illustration and not limitation.
- the first situation shown in FIG. 2 indicates that the maximum multipath delay of the channel does not exceed the length of the CP, and the second situation indicates that the maximum multipath delay of the channel exceeds the length of the CP.
- the transmit symbol 1 is not included in the receive window of the transmit symbol 2, so the ISI of the transmit symbol 1 to the transmit symbol 2 can be avoided.
- the reception window of symbol 1 also does not include the transmitted symbol before the transmitted symbol 1 (not shown in FIG. 2), so the transmitted symbol 1 will not be subject to ISI. It can be understood that the length of the CP is not less than the maximum multipath delay, and the ISI between adjacent received symbols can be removed.
- the CP of the transmit symbol 1 can ensure that the receive window of the transmit symbol 1 contains the complete waveform of the transmit symbol 1
- the CP of the transmit symbol 2 can ensure that the receive window of the transmit symbol 2 contains the transmit The complete waveform of symbol 2, so that CP can remove ICI.
- the receiving window of the transmission symbol 2 contains a segment of the symbol component of the transmission symbol 1, resulting in the transmission symbol 2 being subject to the ISI of the transmission symbol 1.
- the receive window of transmit symbol 1 does not contain the complete waveform of transmit symbol 1
- the receive window of transmit symbol 2 does not contain the complete waveform of transmit symbol 2. Therefore, in case 2, ICI cannot be removed. .
- cyclic prefixes of the same length are configured for different users.
- the current technology chooses to use a cyclic prefix length greater than the maximum multipath delay of users with large delays as the unified cyclic prefix. length.
- a longer cyclic prefix may be allocated to users with a small delay.
- the addition of the cyclic prefix will result in bandwidth costs, that is, the longer the cyclic prefix, the greater the bandwidth cost, or, in other words, the longer the cyclic prefix, the greater the transmission rate loss. Therefore, for users with small delays, an excessively long cyclic prefix will cause unnecessary bandwidth overhead or loss of transmission rate.
- this application proposes a method and device for symbol processing, which can realize flexible configuration of the guard interval between symbols without relying on the length of the cyclic prefix. For example, this application can reduce or overcome ISI and ICI caused by multipath effects for users with different channel conditions while avoiding unnecessary bandwidth overhead.
- This application can be applied to various communication systems, for example, cellular communication systems such as long term evolution (LTE) systems and their evolution, fifth generation (5G) systems, machine to machine communication (machine to machine, M2M) system or other communication systems that will evolve in the future.
- LTE long term evolution
- 5G fifth generation
- M2M machine to machine
- the 5G wireless air interface technology is called a new radio (NR)
- NR new radio
- the 5G system can also be called an NR system.
- single-carrier waveforms include but are not limited to: DFT-s-OFDM waveforms, SC-QAM waveforms.
- the waveform is the transmitted symbol of DFT-s-OFDM, which can also be called DFT-s-OFDM symbol.
- the waveform is the transmitted symbol of SC-QAM, which can also be called SC-QAM symbol.
- SC-QAM which can also be called SC-QAM symbol.
- the transmit symbols in the embodiment of the present application may be DFT-s-OFDM symbols or SC-QAM symbols.
- the sending end may be a terminal device, and the receiving end may be a network device.
- the sending end in the embodiment of the present application may be a network device, and the receiving end may be a terminal device.
- terminal devices involved in this article include handheld devices, vehicle-mounted devices, wearable devices, or computing devices with wireless communication capabilities.
- terminal equipment may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, User agent or user device.
- the terminal device can be a mobile phone, a tablet computer, or a computer with wireless transceiver function.
- Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, and wireless terminals in smart homes.
- the terminal device may be a terminal device in a 5G network or a terminal device in a public land mobile network (PLMN) that will evolve in the future.
- PLMN public land mobile network
- the network equipment involved in this article can be used to communicate with one or more terminal devices, and can also be used to communicate with one or more base stations with partial terminal functions (for example, between a macro base station and a micro base station, such as an access point). Communication). Network equipment can be called a base station. Base stations may come in many forms, such as macro base stations, micro base stations, relay stations, and access points. Exemplarily, the network equipment involved in the embodiments of the present application may be a base station in a new radio (NR), or may be a global system for mobile communication (GSM) or code division multiple access (code division multiple access).
- NR new radio
- GSM global system for mobile communication
- code division multiple access code division multiple access
- the base transceiver station (BTS) in division multiple access (CDMA) can also be the node B (NB) in the wideband code division multiple access (WCDMA) system, or it can be An evolved Node B (evolutional Node B, eNB or eNodeB) in a long term evolution (LTE) system.
- NB node B
- WCDMA wideband code division multiple access
- eNB evolved Node B
- LTE long term evolution
- the base station in 5G NR may also be called a transmission reception point (TRP) or next generation Node B (gNB).
- TRP transmission reception point
- gNB next generation Node B
- the transmitted symbols involved in the embodiments of the present application can be used for uplink transmission and can also be used for downlink transmission.
- the waveforms of the transmitted symbols involved in the embodiments of the present application include, but are not limited to, DFT-s-OFDM waveforms and SC-QAM waveforms.
- Fig. 3 is a schematic flowchart of a symbol processing method according to an embodiment of the present application. The method includes the following steps.
- the transmitting end generates a first transmission symbol in the transmission symbol sequence, where the first transmission symbol and the second transmission symbol have the same first symbol component, and the start position of the first symbol component in the first transmission symbol is the The starting position of the first transmission symbol, the starting position of the first symbol component in the second transmission symbol is the position where the cyclic prefix of the second transmission symbol is intercepted, and the second transmission symbol is adjacent to the first transmission symbol For the latter transmission symbol, both the first transmission symbol and the second transmission symbol have a cyclic prefix.
- S320 The sending end sends the first transmission symbol.
- the receiving end receives the first transmitted symbol.
- step S320 the receiving end uses the adjusted receiving window of the first transmission symbol to receive the first transmission symbol.
- the method further includes: the receiving end determines a first reception window for receiving the first transmission symbol, and adjusts the time of the first reception window so that the first reception window The first transmitted symbol can be completely received.
- the receiving end uses the adjusted first receiving window to receive the first transmitted symbol.
- the first transmission symbol and the second transmission symbol are the transmission symbol x and the transmission symbol x+1 in FIG. 6 respectively, and the first symbol component is the symbol component D1 shown in FIG. 6.
- the first receiving window is shown as the receiving window x in Fig. 6, and the adjusted first receiving window is shown as the receiving window x'in Fig. 6.
- FIG. 6 is a schematic diagram of a time domain structure of a transmitted symbol in an embodiment of this application.
- the reception of transmitted symbols under two channel conditions is given.
- FIG. 6 only shows a schematic diagram of the first path and the maximum delay path (corresponding to two channel conditions).
- the transmission symbol x and the transmission symbol x+1 shown in FIG. 6 represent two adjacent transmission symbols, and the transmission symbol x is before the transmission symbol x+1.
- the transmission symbol x and the transmission symbol x+1 have the same symbol component D1, where the start position of the symbol component D1 in the transmission symbol x is the start position of the transmission symbol x, and the transmission symbol x+1
- the starting position of the symbol component D1 is the position of the intercepted CP of the transmitted symbol x+1.
- Both the transmission symbol x and the transmission symbol x+1 have a cyclic prefix (hereinafter referred to as CP for short).
- CP cyclic prefix
- the CP of the transmission symbol x+1 also includes a symbol component D1, and the symbol component D1 is located at the head of the CP of the transmission symbol x+1.
- the transmission symbol x and the transmission symbol x+1 have the same symbol component D1, which means that the transmission symbol x and the transmission symbol x+1 have symbol components with the same length and the same content.
- the receiving window x shown in FIG. 6 represents the receiving window of the transmitted symbol x.
- the reception window x'shown in Fig. 6 represents the reception window x after the time adjustment has elapsed.
- the receiving end can receive the transmitted symbol x within the receiving window x'.
- the header of the CP of the transmission symbol x+1 contains the symbol component D1 of the transmission symbol x, therefore, the part of the CP of the transmission symbol x+1 that enters the receiving window x'also belongs to the component of the transmission symbol x .
- the first step length is not greater than the length of the symbol component D1, it can be guaranteed that the receiving window x'will not include symbol components other than the transmitted symbol x.
- receiving the transmitted symbol x in the receiving window x' one is to make no other transmitted symbols in the receiving window x', and the other is to make the receiving window x'can receive the transmitted symbol x completely, thereby reducing or overcoming the multipath effect Caused by ISI and ICI.
- the multiplicity can be reduced or overcome. ISI and ICI caused by path effect.
- the length of the first symbol component can be increased to reduce or overcome the ISI and ICI caused by the multipath effect.
- increasing the length of the first symbol component can increase the adjustment time of the reception window of the first transmission symbol accordingly, so that the reception window of the first transmission symbol does not contain other components.
- the symbol is transmitted, and the first transmitted symbol can be completely received within the receiving window of the first transmitted symbol, so that the ISI and ICI caused by the multipath effect can be reduced or overcome.
- the embodiments of this application can flexibly implement the guard interval between symbols without relying on the length of the cyclic prefix, and at the same time, it can also ensure that the transmitted symbol is completely received within the receiving window of a certain transmitted symbol, that is, Reduce or overcome ISI and ICI caused by multipath effects.
- this application can reduce or overcome ISI and ICI caused by multipath effects without relying on the length of the cyclic prefix, this application can flexibly implement inter-symbol protection based on the needs of users with different channel conditions.
- the length of the interval can be implemented using
- the present application does not limit the manner in which the receiving end receives the first transmitted symbol.
- the receiving end can determine the way of receiving the first transmitted symbol according to application requirements.
- the receiving end can use the first receiving window (that is, the receiving window of the first transmitting symbol) to receive the first transmitted symbol, that is, there is no need to adjust the first receiving window .
- the receiving end may use the adjusted first receiving window (that is, the receiving window of the first transmitted symbol) to receive the first transmitted symbol, where the adjusted first The receiving window can completely receive the first transmitted symbol.
- the manner in which the receiving end receives the first transmitted symbol can be independently determined by the receiving end, which is not limited in this application.
- the length mentioned in this article for example, the length of the CP and the length of the symbol component, all refer to the length of time.
- the time length can also be expressed by the number of time domain sampling points.
- FIG. 3 is only an example and not a limitation.
- the transmitting end may generate all the transmitted symbols in the transmitted symbol sequence before sending.
- the first transmission symbol and the second transmission symbol may represent any two adjacent transmission symbols in the transmission symbol sequence. That is, the first transmission symbol may represent the previous one of any two adjacent transmission symbols in the transmission symbol sequence.
- the transmission symbol x and the transmission symbol x+1 may represent any two adjacent transmission symbols in the transmission symbol sequence.
- the receiving end may use the time-adjusted receiving window to receive the remaining transmitted symbols except the last transmitted symbol in the transmitted symbol sequence.
- the first transmission symbol represents the first transmission symbol in the transmission symbol sequence. That is, the first transmission symbol and the second transmission symbol may represent the first transmission symbol and the second transmission symbol in the transmission symbol sequence.
- the transmission symbol x represents the first transmission symbol in the transmission symbol sequence
- the transmission symbol x+1 represents the second transmission symbol in the transmission symbol sequence.
- the method further includes the following steps S330 and S340.
- the transmitting end generates a third transmission symbol in the transmission symbol sequence, the third transmission symbol and the fourth transmission symbol have the same second symbol component, and the end position of the second symbol component in the third transmission symbol is the third transmission symbol
- the position where the cyclic prefix is intercepted, the end position of the second symbol component in the fourth transmission symbol is the end position of the fourth transmission symbol, the fourth transmission symbol is the previous transmission symbol adjacent to the third transmission symbol, and the third transmission symbol
- Both the symbol and the fourth transmitted symbol have a cyclic prefix.
- the sending end sends a third transmission symbol.
- the receiving end uses the receiving window of the third transmission symbol to receive the third transmission symbol.
- step S330 and step S320 is not limited.
- the transmitting end may generate all the transmitted symbols in the transmitted symbol sequence before sending.
- the third transmission symbol is the transmission symbol x+1 as shown in FIG. 6,
- the fourth transmission symbol is the transmission symbol x as shown in FIG. 6, and the second symbol component is the symbol component D2 as shown in FIG. 6,
- the receiving window of the third transmitted symbol is the receiving window x+1 as shown in FIG. 6.
- FIG. 6 is a schematic diagram of a time domain structure of a transmitted symbol in an embodiment of this application.
- the reception of transmitted symbols under two channel conditions is given.
- FIG. 6 only shows a schematic diagram of the first path and the maximum delay path (corresponding to two channel conditions).
- the transmission symbol x and the transmission symbol x+1 shown in FIG. 6 represent two adjacent transmission symbols, and the transmission symbol x is before the transmission symbol x+1.
- the transmission symbol x and the transmission symbol x+1 have the same symbol component D2, where the end position of the symbol component D2 in the transmission symbol x is the end position of the transmission symbol x, and the symbol component in the transmission symbol x+1
- the end position of D2 is the position of the intercepted CP of the transmitted symbol x+1.
- the transmission symbol x and the transmission symbol x+1 have the same symbol component D2, which means that the transmission symbol x and the transmission symbol x+1 have symbol components with the same length and the same content.
- both the transmission symbol x and the transmission symbol x+1 have a cyclic prefix (hereinafter referred to as CP for short).
- the receiving window x represents the receiving window of the transmitted symbol x
- the receiving window x+1 represents the receiving window of the transmitted symbol x+1.
- the part of the receiving window x+1 into which the transmitted symbol x enters is part of the symbol component D2, and the transmitted symbol x+1 also contains the symbol component D2, that is, the receiving window x+ into which the transmitted symbol x enters
- the part of 1 is also the symbol component contained in the transmitted symbol x+1 itself. Therefore, the transmission symbol x and the transmission symbol x+1 have the same symbol component D2, which can prevent symbol components that do not belong to the transmission symbol x+1 from entering the transmission symbol even when the maximum multipath delay exceeds the CP length.
- x+1 reception window which can overcome ISI.
- the symbol component D2 in the transmission symbol x and the CP of the transmission symbol x+1 can be regarded as an equivalent guard interval between the transmission symbol x and the transmission symbol x+1.
- the guard interval between symbols can also be flexibly set without relying on the CP length to overcome ISI and ICI caused by multipath delay.
- the length of the symbol component D2 can be controlled to overcome the multipath effect of different users.
- the transmission symbols shown can support multiplexing (frequency division, space division and time division) among users with different subcarrier spacing and/or CP types.
- the fourth transmission symbol and the third transmission symbol may represent any two adjacent transmission symbols in the transmission symbol sequence. That is, the third transmission symbol may represent the latter of any two adjacent transmission symbols in the transmission symbol sequence.
- the first transmission symbol may represent the previous one of any two adjacent transmission symbols in the transmission symbol sequence, or the first transmission symbol only represents the first transmission symbol in the transmission symbol sequence.
- the third transmission symbol may be the same transmission symbol as the first transmission symbol.
- the first transmission symbol and the second transmission symbol also have the same second symbol component, and the end position of the second symbol component in the first transmission symbol is the end position of the first transmission symbol , The end position of the second symbol component in the second transmission symbol is the position of the intercepted CP of the second transmission symbol.
- the first transmission symbol is the transmission symbol 1 shown in FIG. 7.
- FIG. 7 is a schematic diagram of a time domain structure of a transmitted symbol in another embodiment of this application.
- a schematic diagram of the reception situation of the transmitted symbol under two channel conditions is shown.
- FIG. 7 only shows a schematic diagram of the first path and the maximum delay path (corresponding to two channel conditions).
- transmit symbol 0, transmit symbol 1, and transmit symbol 2 respectively represent the first, second, and third transmit symbols in the transmit symbol sequence.
- Transmission symbol 0, transmission symbol 1, and transmission symbol 2 all have a CP.
- Receiving window 0 represents the receiving window of the transmitted symbol
- the step size of the receiving window 0'relative to the receiving window 0 is not greater than the symbol component D1
- the receiving window 1 represents the transmitting symbol
- the receiving window of 1, and the receiving window of 2 represent the receiving window of the transmitted symbol 2.
- the transmission symbol 0 and the transmission symbol 1 have the same symbol component D1
- the start position of the symbol component D1 in the transmission symbol 0 is the start position of the transmission symbol 0
- the start position of the symbol component D1 in the transmission symbol 1 The position is the position where the CP of the transmitted symbol 1 is intercepted.
- the multipath effect of the transmission symbol 0 can be overcome by using the reception window 0'to receive the transmission symbol 0.
- the transmission symbol 0 and the transmission symbol 1 also have the same symbol component D2, the end position of the symbol component D2 in the transmission symbol 0 is the end position of the transmission symbol 0, and the end position of the symbol component D2 in the transmission symbol 1 is The position of the intercepted CP of the transmitted symbol 1.
- the transmission symbol 1 and the transmission symbol 2 have the same symbol component D3
- the end position of the symbol component D3 in the transmission symbol 1 is the end position of the transmission symbol 1
- the end position of the symbol component D3 in the transmission symbol 2 is the transmission The position of the interception CP of symbol 2.
- the non-first transmitted symbol and its adjacent subsequent transmitted symbol may also have the same symbol component similar to the symbol component D1.
- the transmission symbol 1 and the transmission symbol 2 shown in FIG. 7 also have the same symbol component D4, and the start position of the symbol component D4 in the transmission symbol 1 is the start of the transmission symbol 1.
- Position, the starting position of the symbol component D4 in the transmitted symbol 2 is the position where the CP of the transmitted symbol 2 is intercepted.
- the receiving end can also use the adjusted receiving window of the transmitted symbol 1 (denoted as receiving window 1') to transmit the symbol 1, for example, the receiving window 1'slides backward relative to the receiving window 1 by no more than the symbol The step size of the length of component D4.
- the multipath effect of the transmission symbol 1 can be overcome by using the reception window 1'to receive the transmission symbol 1.
- the transmission symbol sequence may include a greater number of transmission symbols, where any two adjacent transmission symbols may have a time domain structure similar to transmission symbol 0 and transmission symbol 1, or similar to transmission symbol 1 and transmission symbol 1. Time domain structure of symbol 2.
- any two adjacent transmission symbols in the transmission symbol sequence may be the first transmission symbol and the second transmission symbol in the foregoing embodiment, respectively.
- the last transmission symbol in the transmission symbol sequence and the adjacent previous transmission symbol may be the third transmission symbol and the fourth transmission symbol in the above embodiment, respectively.
- the time domain structure of any two adjacent transmission symbols in the transmission symbol sequence is as shown in the time domain structure of the transmission symbol x+1 and the transmission symbol x in FIG. 6.
- the time domain structure of the last transmission symbol and its neighboring previous transmission symbol in the transmission symbol sequence may be as shown in the time domain structure of the transmission symbol x+1 and the transmission symbol x in FIG. 6.
- the ISI and ICI caused by the multipath effect can be reduced or overcome.
- any two adjacent transmission symbols in the transmission symbol sequence may be the fourth transmission symbol and the third transmission symbol in the foregoing embodiment, respectively.
- the first transmission symbol and the second transmission symbol in the transmission symbol sequence may be the first transmission symbol and the second transmission symbol in the above embodiment, respectively.
- the time domain structure of any two adjacent transmission symbols in the transmission symbol sequence is shown in the time domain structure of the transmission symbol x and the transmission symbol x+1 in FIG. 4.
- the time domain structure of the first transmission symbol and the second transmission symbol in the transmission symbol sequence may be as shown in the time domain structure of the transmission symbol x and the transmission symbol x+1 in FIG. 4.
- the ISI and ICI caused by the multipath effect can be reduced or overcome.
- this application by making two adjacent transmitted symbols have the same symbol component, it is possible to flexibly set the guard interval between symbols without relying on the length of the CP. For example, this application can reduce or overcome ISI and ICI caused by multipath effects for users with different channel conditions while avoiding unnecessary bandwidth overhead.
- the length of the CP of each transmission symbol in the transmission symbol sequence may be different, may also be the same, or not completely the same.
- the transmission symbol sequence involved in the embodiments of the present application may be a symbol sequence composed of multiple transmission symbols.
- the transmission symbol sequence involved in the embodiment of the present application may also be a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- the amount of data that needs to be transmitted is relatively small.
- the amount of data that needs to be transmitted may be only one or a few bits.
- the transmission of the service can be completed by one transmission symbol.
- This scenario is called It is a short packet transmission or a short-term transmission (the short packet transmission is described as an example below).
- Short packet transmission may exist in uplink transmission.
- the amount of data that the terminal device needs to send may be only one or A few bits, in this case, the terminal device can send a transmission symbol to complete the service transmission.
- Short packet transmission may also exist in downlink transmission.
- the data that the network device needs to send may only be one or a few bits.
- the network device sends a transmit symbol to complete the transmission of the downlink signal.
- a reference signal in the single transmission symbol, such as a demodulation reference signal (de-modulation reference signal). , DMRS).
- DMRS demodulation reference signal
- a reference signal is usually added to the reference signal. It can be understood that the single transmission symbol is split into multiple sub-transmission symbols.
- Fig. 8 is a schematic diagram of classifying a single transmission symbol into 4 sub-transmission symbols.
- the reference signal is DMRS as an example.
- a single transmission symbol is processed into 4 sub-transmission symbols, where the third sub-transmission symbol is a DMRS.
- the single transmission symbol can be regarded as being processed as a transmission symbol sequence composed of 4 sub-transmission symbols.
- CP1 represents the CP of the first sub-transmission symbol in the transmission symbol sequence
- CP2 represents the CP of the second sub-transmission symbol in the transmission symbol sequence
- CP3 represents the CP of the third sub-transmission symbol in the transmission symbol sequence
- CP4 represents the transmission The CP of the 4th sub-transmitted symbol in the symbol sequence.
- This application can be applied to the transmission symbol sequence composed of multiple sub-transmission symbols shown in FIG. 8.
- a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol is referred to as a second-type transmission symbol sequence hereinafter.
- the first transmission symbol in the above embodiment may be the first sub-transmission symbol in the second-type transmission symbol sequence, or the first transmission symbol in the above embodiment may represent any phase in the second-type transmission symbol sequence.
- the third transmission symbol in the above embodiment may represent the last sub-transmission symbol of any two adjacent sub-transmission symbols in the second-type transmission symbol sequence.
- the length of the CP of each sub-transmission symbol may be different, or the same, or not completely the same.
- This application also provides a method for symbol processing, which includes the following steps.
- Step 1 The transmitting end generates the first sub-transmission symbol in the transmission symbol sequence, where the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- Step 2 The sending end sends the first sub-transmission symbol.
- the receiving end receives the first sub-transmission symbol based on the receiving window of the first sub-transmission symbol.
- the first sub-transmission symbol and the second sub-transmission symbol have the same first symbol component
- the start position of the first symbol component in the first sub-transmission symbol is the start position of the first transmission symbol
- the start position of the symbol component in the second sub-transmission symbol is the position where the cyclic prefix of the second transmission symbol is intercepted
- the second sub-transmission symbol is the next transmission symbol adjacent to the first sub-transmission symbol
- the first sub-transmission symbol Both have a cyclic prefix with the second sub-transmission symbol.
- the time-domain structure of the first sub-transmission symbol is the time-domain structure of the transmission symbol x shown in FIG. 4.
- the first sub-transmission symbol may represent the first sub-transmission symbol in the second column of the transmission symbol sequence.
- the first sub-transmission symbol may represent the previous sub-transmission symbol among two adjacent sub-transmission symbols in the second column of the transmission symbol sequence.
- the receiving end may use the adjusted receiving window of the first sub-transmission symbol to receive the first sub-transmission symbol.
- the first sub-transmission symbol and the third sub-transmission symbol have the same second symbol component, and the end position of the second symbol component in the first sub-transmission symbol is the position where the cyclic prefix of the first sub-transmission symbol is intercepted,
- the end position of the second symbol component in the third sub-transmission symbol is the end position of the third sub-transmission symbol, the third sub-transmission symbol is the previous transmission symbol adjacent to the first sub-transmission symbol, and the first sub-transmission symbol is the same as
- the third sub-transmission symbols all have a cyclic prefix.
- the time domain structure of the first sub-transmission symbol is the time domain structure of the transmission symbol x+1 shown in FIG. 6.
- the first sub-transmission symbol may represent the last sub-transmission symbol among two adjacent sub-transmission symbols in the second column of the transmission symbol sequence.
- the first sub-transmission symbol and the second sub-transmission symbol have the same first symbol component
- the first sub-transmission symbol and the third sub-transmission symbol have the same second symbol component
- the time-domain structure of the first sub-transmission symbol is the time-domain structure of the transmission symbol 1 shown in FIG. 7.
- the first sub-transmission symbol may represent any sub-transmission symbol except the first sub-transmission symbol and the last sub-transmission symbol in the second-column transmission symbol sequence.
- the receiving end may use the adjusted receiving window of the first sub-transmission symbol to receive the first sub-transmission symbol.
- this application also provides a method for symbol processing.
- this method only the sub-transmission symbols whose CP is less than the maximum time delay of the multipath may be subjected to guard interval extension processing.
- the method includes: determining that the CP of the first sub-transmission symbol in the second-type transmission symbol sequence is less than the maximum multipath delay, and generating the first sub-transmission symbol by using a guard interval extension processing method, and the guard interval extension processing does not change the first sub-transmission symbol.
- the CP length of the transmitted symbol can equivalently extend the guard interval of the first sub-transmitted symbol.
- the CP extension mode makes the first sub-transmission symbol and the second sub-transmission symbol have the same first symbol component, and the first symbol component is in the first sub-transmission symbol.
- the starting position in the symbol is the starting position of the first transmission symbol
- the starting position of the first symbol component in the second sub-transmission symbol is the position of the intercepting cyclic prefix of the second transmission symbol
- the second sub-transmission symbol is and
- the first sub-transmission symbol is adjacent to the next transmission symbol, and both the first sub-transmission symbol and the second sub-transmission symbol have a cyclic prefix.
- the CP extension mode is such that:
- the first sub-transmission symbol and the second sub-transmission symbol have the same first symbol component
- the start position of the first symbol component in the first sub-transmission symbol is the start position of the first transmission symbol
- the first symbol component is in the first sub-transmission symbol.
- the starting position in the second sub-transmission symbol is the position of the second transmission symbol to intercept the cyclic prefix
- the second sub-transmission symbol is the next transmission symbol adjacent to the first sub-transmission symbol
- the first sub-transmission symbol and the second sub-transmission symbol All transmitted symbols have a cyclic prefix; or
- the first sub-transmission symbol and the third sub-transmission symbol have the same second symbol component, and the end position of the second symbol component in the first sub-transmission symbol is the position where the cyclic prefix of the first sub-transmission symbol is intercepted, and the second symbol component
- the end position in the third sub-transmission symbol is the end position of the third sub-transmission symbol
- the third sub-transmission symbol is the previous transmission symbol adjacent to the first sub-transmission symbol
- the first sub-transmission symbol and the third sub-transmission The symbols all have a cyclic prefix.
- a conventional method can be used to generate the sub-transmission symbols.
- the traditional method is used to generate the four sub-transmission symbols; if the CP2 is less than the maximum multipath delay, the above The guard interval extension processing method generates the second sub-transmission symbol, and the other three sub-transmission symbols are generated by the traditional method.
- Fig. 9 is a schematic diagram of the basic flow of generating transmission symbols. As shown in Figure 9, the process includes the following steps S920, S940, and S960.
- multiple complex symbols are divided into multiple sets, and each set corresponds to a transmitted symbol.
- the plurality of complex symbols may include modulation symbols obtained by modulating the coded bit stream.
- the modulation method for modulating the coded bit stream may include pi/2-binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), 16 quadrature amplitude Modulation (quadrature amplitude modulation, QAM), 64QAM, 256QAM, phase shift keying (PSK), amplitude phase shift keying (APSK), non-uniform QAM, etc.
- BPSK pi/2-binary phase shift keying
- QPSK quadrature phase shift keying
- 16 quadrature amplitude Modulation quadrature amplitude Modulation
- QAM quadrature amplitude modulation
- QAM quadrature amplitude modulation
- PSK phase shift keying
- APSK amplitude phase shift keying
- the reference signal sampling points may also be included in the multiple complex symbols.
- the reference signal sampling points may include phase tracking reference signal (phase tracking reference signal, PTRS) sampling points and the like.
- Each set corresponds to a transmit symbol, which means that each transmit symbol that is finally generated is generated based on a corresponding set.
- step S940 Perform a complex symbol copy operation on the multiple sets obtained in step S920.
- the transmission symbol is obtained by adding CP (or, based on the set after the copy operation obtained in step S940, the CP is added, and then other operations are performed to obtain the transmission symbol.
- the other operations mentioned include but are not limited to fast Fourier transform, carrier mapping, sampling, filtering, etc.).
- the copy operation in step 340 makes the two sets have partially the same complex symbols.
- step S940 The copy operation in step S940 will be described below.
- the naming conventions for the signals in this article are as follows: the signals to be grouped (or divided) into sets are called complex symbols; the signals obtained by grouping (or dividing) complex symbols are called sets; The set formed by part of the complex numbers in the set is called the subset; the signal sent by the transmitting end is called the transmit symbol.
- the transmitted symbol in the embodiment of the present application may be a symbol of a single carrier waveform.
- the transmitted symbols are DFT-s-OFDM symbols or SC-QAM symbols.
- the DFT-s-OFDM symbol represents a single carrier symbol whose waveform is a DFT-s-OFDM waveform.
- the SC-QAM symbol represents a single carrier symbol whose waveform is an SC-QAM waveform.
- the application of this application to the wireless communication system using the DFT-s-OFDM waveform is recorded as application scenario 1
- the application of this application to the wireless communication system using the SC-QAM waveform is recorded as application scenario 2.
- the application scenario of the present application is application scenario 1, that is, the transmitted symbols are DFT-s-OFDM symbols.
- step S950 may be further included between step S940 and step S960.
- Step S950 includes discrete Fourier transform (DFT) and inverse fast Fourier transform (IFFT) operations.
- DFT discrete Fourier transform
- IFFT inverse fast Fourier transform
- step S950 the transmitter performs M-point DFT transformation on the set after the copy operation, and then maps the frequency domain elements of the M points to M consecutive sub-carriers (not shown in Figure 10). After that, IFFT transformation is performed on the frequency domain signal. After sub-carrier mapping, IFFT is performed. DFT can also be called frequency domain precoding.
- step S960 includes adding a CP to the signal after IFFT to obtain a DFT-s-OFDM symbol.
- step S950 also includes a frequency domain spectrum shaping (FDSS) operation.
- FDSS frequency domain spectrum shaping
- step S950 the transmitter performs M-point DFT transformation on the set after the copy operation, performs cyclic extension and frequency-domain filtering (ie, FDSS operation) on the M-point frequency domain elements after DFT transformation, and then performs FDSS operation
- FDSS operation cyclic extension and frequency-domain filtering
- the application scenario of this application is application scenario 2, that is, the transmission symbol is an SC-QAM symbol.
- step S960 it not only includes the operation of adding CP, but also includes upsampling and filtering.
- step S960 the transmitter adds a CP to the collection after the copy operation to obtain the CP-added signal, and then performs up-sampling and filtering on the CP-added signal to finally obtain the SC-QAM symbol.
- FIG. 12 is a schematic flowchart of a method for generating transmission symbols in an embodiment of the application.
- the adjacent transmission symbol y and the transmission symbol y+1 are taken as an example for description, where the transmission symbol y is located before the transmission symbol y+1.
- the process of generating the transmission symbol y and the transmission symbol y+1 includes the following steps S1210 to S1240.
- the plurality of complex symbols may include modulation symbols obtained by modulating the coded bit stream.
- the reference signal sampling points may also be included in the plurality of complex symbols.
- the reference signal sampling points may include PTRS sampling points.
- S1220 Divide multiple complex symbols into multiple sets, which can also be expressed as grouping multiple complex symbols to obtain multiple sets.
- Each set can include several complex symbols.
- each set can be regarded as a multi-dimensional time domain vector, and the complex symbols in the set can be regarded as elements in the time domain vector.
- Each set corresponds to a transmitted symbol.
- each set corresponds to one DFT-s-OFDM symbol or SC-QAM symbol.
- the plurality of sets includes a first set corresponding to transmission symbols y and a second set corresponding to transmission symbols y+1.
- step S1220 may correspond to step S920 shown in FIG. 9, FIG. 10, and FIG. 11, respectively.
- S1230 Perform a copy operation on the first set and the second set, so that the first set and the second set have partially the same complex symbols.
- step S1230 may correspond to step S940 shown in FIG. 9, FIG. 10, and FIG. 11, respectively.
- step S1230 is performed before DFT; in application scenario 2, step 1230 is performed before adding CP.
- S1240 Generate a transmission symbol y based on the first set, and generate a transmission symbol y+1 based on the second set.
- the transmitted symbol y and the transmitted symbol y+1 can be made to have any two adjacent transmissions as shown in FIG. 4, FIG. 6 or FIG. 7.
- the time domain structure of the symbol can be made to have any two adjacent transmissions as shown in FIG. 4, FIG. 6 or FIG. 7.
- the transmission symbol y and the transmission symbol y+1 may respectively correspond to the first transmission symbol and the second transmission symbol in the above embodiment.
- the transmission symbol y and the transmission symbol y+1 may respectively correspond to the fourth transmission symbol and the third transmission symbol in the above embodiment.
- step S1230 may have a variety of different implementation manners. This will be described below.
- three reference points are defined for the transmitted symbol: a first reference point, a second reference point, and a third reference point, where the first reference point indicates the end position of the transmitted symbol, and the first reference point
- the second reference point represents the position of the intercepted CP of the transmitted symbol
- the third reference point represents the starting position of the transmitted symbol.
- the starting position of the transmitted symbol refers to the starting position of the transmitted symbol itself, not the starting position of the CP of the transmitted symbol, or, from another perspective, it can be understood that the starting position of the transmitted symbol refers to the starting position of the transmitted symbol.
- the end position of the CP of the transmitted symbol is defined for the transmitted symbol: a first reference point, a second reference point, and a third reference point, where the first reference point indicates the end position of the transmitted symbol, and the first reference point
- the second reference point represents the position of the intercepted CP of the transmitted symbol
- the third reference point represents the starting position of the transmitted symbol.
- the starting position of the transmitted symbol refers to the starting position
- the locations mentioned in this article refer to time domain locations.
- Application scenario one that is, the transmitted symbol is a DFT-s-OFDM symbol.
- the symbol processing flow is shown in Figure 10.
- the time domain vector can be denoted as:
- x l [x l (0),x l (1),...,x l (M-1)] T
- x l represents the time domain vector.
- the time domain vector x l includes M elements, and the time domain indexes of the first element to the last element are 0, 1, ..., M-1, respectively.
- the calculation result of K is a non-integer. In this case, the calculation result of K needs to be rounded, that is It means that (P/N) ⁇ M is rounded down. It should be understood that the rounding method here may also be rounding up or rounding.
- the number of sampling points P of the CP can be obtained according to the length of the CP.
- Application scenario two that is, the transmitted symbol is an SC-QAM symbol.
- DFT and IFFT are not included before adding the CP, and upsampling and filtering are performed after adding the CP, so the CP length can be directly obtained according to the CP length
- the number of equivalent points in the time domain vector. Therefore, the transmitter can directly obtain the equivalent CP length value K1.
- the equivalent CP length value K1 can be obtained according to the length of the CP.
- the time domain vector without CP added is the M-dimensional time domain vector x l described in Application Scenario 1, and assuming the equivalent CP length value is K1, then for the first reference point of the SC-QAM symbol, it is in the time domain vector
- the time domain index in x l is M-1.
- For the second reference point of the SC-QAM symbol its time domain index in the time domain vector x l is M-K1-1.
- For the first reference point in the SC-QAM symbol Three reference points, whose time domain index in the time domain vector x l is 0.
- the set can be regarded as a multi-dimensional time domain vector.
- the time domain vector x l in the above example may represent the time domain vector corresponding to the set.
- the elements in the time domain vector x l correspond to the complex symbols in the set.
- the time domain index of the element in the time domain vector x l corresponds to the position of the complex symbol in the collection in the collection.
- the temporal position e.g., the first reference point, the second reference point, third reference point
- time domain transmit symbols x l vector index in the time domain and in time domain vector elements x l having a corresponding Correspondence. Therefore, the position of the complex symbol in the set also has a corresponding relationship with the position in the transmitted symbol corresponding to the set.
- the first set and the second set can be copied in multiple different ways.
- the transmission symbol y and the transmission symbol y+1 respectively correspond to the first transmission symbol and the second transmission symbol in the above embodiment
- the transmission symbol y and the transmission symbol y+1 are respectively the transmission symbol x in FIG. 4
- the first copy operation can be performed on the first set and the second set in step S1230.
- the first copy operation makes the first set and the second set have the first complex symbol, the starting position of the first complex symbol in the first set corresponds to the third reference point of the transmitted symbol y, and the first complex symbol is at The starting position in the second set corresponds to the second reference point of the transmitted symbol y+1.
- the first complex number symbol may include a plurality of complex number symbols.
- the transmission symbol y and the transmission symbol y+1 respectively correspond to the fourth transmission symbol and the third transmission symbol in the above embodiment
- the transmission symbol y and the transmission symbol y+1 are respectively the transmission symbol x in FIG. 6
- the second copy operation can be performed on the first set and the second set in step S1250.
- the second copy operation makes the first set and the second set have the second complex symbol, the end position of the second complex symbol in the first set corresponds to the first reference point of the transmitted symbol y, and the second complex symbol is in the first set.
- the end position in the second set corresponds to the second reference point of the transmitted symbol y+1.
- the second complex number symbol may include a plurality of complex number symbols.
- the time domain vector corresponding to the first subset formed by the second complex number symbol in the first set is the following sub-vector x l [1] in the time domain vector x l corresponding to the first set:
- the time domain vector corresponding to the second subset formed by the second complex number symbol in the second set is the following sub-quantity x l+1 in the time domain vector x l+1 corresponding to the second set [2]:
- M is the time domain vector x l dimension of the first set of time domain vector corresponding to the second set corresponding to x l + 1, and Represents the length of the subset formed by the same complex symbols between the first set and the second set
- MK-1 represents the time domain of the second reference point of the second transmitted symbol in the time domain vector corresponding to the second set Index
- the value of K is related to the length of the cyclic prefix (CP). For example, the value of K is determined according to the length of CP.
- K in this example is equal to the equivalent CP length value K1.
- the sub-vector x l [1] in the time domain vector x l corresponding to the first set is the same as the element contained in the first subset in the first set, and the time domain corresponding to the second set vector x l + 1 sub-vector x l + 1 [2] and a second subset of the second set of elements included in the same.
- the transmission symbol y and the transmission symbol y+1 respectively correspond to the first transmission symbol and the second transmission symbol in the above embodiment, and respectively correspond to the fourth transmission symbol and the third transmission symbol in the above embodiment
- the transmission symbol y and the transmission symbol y+1 are respectively the transmission symbol 1 and the transmission symbol 2 in FIG. 7, and the third copy operation may be performed on the first set and the second set in step S1250.
- the third copy operation includes the first copy operation and the second copy operation. That is, the third copy operation makes both the first set and the second set have the first complex number symbol and the second complex number symbol.
- the first type of copy operation and the second type of copy operation are performed separately.
- the first type of copy operation and the second type of copy operation are combined and executed, that is, the first type of copy operation and the second type of copy operation are completed in one copy operation.
- the first copy operation performed on the first set and the second set can also be understood as mapping the first complex number symbol in the first set and the second set.
- the second copy operation performed on the first set and the second set can also be understood as mapping the second complex number symbol in the first set and the second set.
- step S1230 Take the second copy operation performed on the first set and the second set in step S1230 as an example.
- the second complex symbol in the first set is copied to the second set.
- the time domain vector corresponding to the first subset formed by the copied second complex symbols in the first set is x l [1] described above, and the second complex number copied from the first set to the second set
- the time domain vector corresponding to the second subset formed by the symbols is x l+1 [2] described above.
- step S1230 Also take the second copy operation performed on the first set and the second set in step S1230 as an example.
- the second complex symbol in the second set is copied to the first set.
- the time domain vector corresponding to the second subset formed by the copied second complex symbols in the second set is x l+1 [2] described above, and is copied from the second set to the first set in the first set.
- the time domain vector corresponding to the first subset formed by the two complex symbols is x l [1] described above.
- forward copy and backward copy can also be applied to the first copy operation of the first set and the second set, and will not be repeated here.
- the above-mentioned third copy operation may be replaced with the first copy operation and signal processing, and the signal processing can realize the shift of the set in the time domain.
- the method further includes step S1250.
- Step S1250 signal processing is performed on the first set and the second set, and the signal processing includes cyclic shift or frequency domain weighting.
- step S1250 the first set and the second set after the copy operation are processed.
- step S1250 signal processing is performed on the time domain signal corresponding to the first set and the time domain signal corresponding to the second set; if the signal processing in step S1250 is The signal processing is frequency domain weighting, then in step S1250, frequency domain weighting is performed on the frequency domain signal corresponding to the first set and the frequency domain signal corresponding to the second set.
- step S1250 The execution window of step S1250 varies according to different application scenarios.
- step S1250 may include 1, 2, and 3 as shown in FIG. 10.
- step S1250 is executed before DFT.
- step S1250 the first set and the second set are cyclically shifted.
- step S1250 is executed after DFT and before IFFT.
- step S1250 perform DFT on the first set and the second set to obtain the frequency domain signals of the first set and the second set respectively, and then perform frequency domain weighting on the frequency domain signals of the first set and the second set,
- the cyclic shift of the first set and the second set is equivalently realized.
- step S1250 is performed after IFFT and before adding CP.
- step S1250 the time domain symbols of the first set and the second set are cyclically shifted.
- step S1250 is executed before adding the CP.
- step S1230 includes: performing a second copy operation on the first set and the second set;
- step S1250 includes: performing a copy operation on the first set with the same step size and direction. Perform a cyclic shift with the second set, so that the end position of the first subset formed by the second complex symbol in the first set corresponds to the position after the first reference point of the transmitted symbol y, and the second complex symbol is in the second set The end position of the second subset formed in corresponds to the position after the second reference point of the transmitted symbol y+1.
- first set and the second set are cyclically shifted with the same step size and direction, it is possible to realize that the symbol component whose end position is the first reference point in the transmitted symbol y ends in the transmitted symbol y+1.
- the position is the same as the sign component of the second reference point.
- the first set can be generated based on the first set as shown in FIG. Transmission symbol 1, based on the second set, can generate transmission symbol 2 as shown in FIG. 7 (assuming that transmission symbol 1 and transmission symbol 2 shown in FIG. 7 have a symbol component D2).
- step S1230 through a copy operation, the first set and the second set have partly the same complex symbols.
- the subset formed by the same plural symbols in the first set is called the first subset
- the subset formed by the same plural symbols in the second set is called the subset hereinafter.
- the second subset For the second subset. It should be understood that the lengths of the first subset and the second subset are the same, and the plural symbols included in the first subset and the second subset are the same.
- the time domain position of the first subset and the time domain position of the second subset may be different. That is, the time domain index of the start position of the first subset is different from the time domain index of the start position of the second subset, and the time domain index of the end position of the first subset is different from the time domain index of the end position of the second subset.
- the domain index is different.
- the time domain position of the first subset and the time domain position of the second subset may be the same, that is, the time domain index of the start position of the first subset is the same as the time domain index of the second subset.
- the time domain index of the start position is the same, and the time domain index of the end position of the first subset is the same as the time domain index of the end position of the second subset.
- the copy operation that makes the time domain position of the first subset the same as the time domain position of the second subset is referred to as a co-location copy operation.
- the above-mentioned first copy operation, second copy operation or third copy operation on the first set and the second set in step S1230 can be replaced with the same position copy operation on the first set and the second set
- the signal processing can realize the shift of at least one of the first set and the second set in the time domain.
- the signal processing can be achieved by cyclic shift or frequency domain weighting.
- step 1230 includes: performing a co-location copy operation on the first set and the second set;
- step S1250 includes: performing signal processing on the first set and the second set to achieve The shift of at least one of the first set and the second set in the time domain.
- the signal processing in step S1250 includes cyclic shift or frequency domain weighting.
- the signal processing of the first set and the second set in step S1250 may include the following various signal processing.
- the first signal processing is the first signal processing.
- the transmission symbol y and the transmission symbol y+1 respectively correspond to the first transmission symbol and the second transmission symbol in the above embodiment
- the transmission symbol y and the transmission symbol y+1 are respectively the transmission symbol x in FIG. 4
- the transmission symbol x+1 in step S1250, the first type of signal processing is performed on the first set and the second set, and the first type of signal processing makes the start position of the first subset correspond to the third type of the transmission symbol y The reference point, and the second reference point at which the start position of the second subset corresponds to the transmitted symbol y+1.
- the second type of signal processing is the second type of signal processing.
- the transmission symbol y and the transmission symbol y+1 respectively correspond to the fourth transmission symbol and the third transmission symbol in the above embodiment
- the transmission symbol y and the transmission symbol y+1 are respectively the transmission symbol x in FIG. 6
- the transmitted symbol x+1 in step S1250, the second type of signal processing is performed on the first set and the second set, and the second type of signal processing makes the end position of the first subset correspond to the first reference of the transmitted symbol y Point, and make the end position of the second subset correspond to the second reference point of the transmitted symbol y+1.
- the third type of signal processing is the third type of signal processing.
- the transmission symbol y and the transmission symbol y+1 respectively correspond to the first transmission symbol and the second transmission symbol in the above embodiment, and respectively correspond to the fourth transmission symbol and the third transmission symbol in the above embodiment
- the transmission symbol y and the transmission symbol y+1 are respectively the transmission symbol 1 and the transmission symbol 2 in FIG. 7.
- the first set and the second set are subjected to a third type of signal processing.
- the processing is such that the start position of the first subset corresponds to the position before the first reference point of the transmitted symbol y, and the end position of the first subset corresponds to the position after the first reference point of the transmitted symbol y, and the first The start position of the second subset corresponds to the position before the second reference point of the transmitted symbol y+1, and the end position of the second subset corresponds to the position after the second reference point of the transmitted symbol y+1.
- the third type of signal processing may include two signal processing.
- step S1250 first signal processing is performed on the first set and the second set respectively, and the first signal processing makes the end position of the first subset correspond to the first reference point of the transmitted symbol y, and makes the The end position of the two subsets corresponds to the second reference point of the transmitted symbol y+1; the second signal processing is performed uniformly on the signals of the first set after the first signal processing and the signals of the second set after the first signal processing, The second signal processing is such that the start position of the first subset corresponds to the position before the first reference point of the transmitted symbol y, and the end position of the first subset corresponds to the position after the first reference point of the transmitted symbol y , And make the starting position of the second subset correspond to the position before the second reference point of the transmitted symbol y+1, and the end position of the second subset corresponds to the position after the second reference point of the transmitted symbol y+1 .
- the second signal processing can be understood as a common shift operation on the first set and the second set.
- the first signal processing includes cyclic shift or frequency domain weighting
- the second signal processing includes cyclic shift or frequency domain weighting.
- the first signal processing is cyclic shift
- the second signal processing is also cyclic shift
- the first signal processing is frequency domain weighting
- the second signal processing may be frequency domain weighting or cyclic shift.
- the starting position of the first subset corresponds to the position before the first reference point of the transmitted symbol y, and the end position of the first subset corresponds to the position after the first reference point of the transmitted symbol y
- the starting position of the first subset corresponds to the position before the first reference point of the transmitted symbol y
- the end position of the first subset corresponds to the first reference point of the transmitted symbol y.
- the premise of "the position after” is to perform signal processing on the first set, that is, perform cyclic shift or frequency domain weighting on the first set.
- the end position of the first subset corresponds to the position after the first reference point of the transmitted symbol y
- the position corresponds to the head position of the transmitted symbol y
- the end position of the first subset corresponds to the position after the third reference point of the transmitted symbol y.
- the end position of the first subset corresponds to the position after the first reference point of the transmitted symbol y
- the position before the first reference point of the symbol y can be understood as "the end position of the first subset”
- the position corresponds to the head position of the transmitted symbol y”
- the end position of the first subset corresponds to the position after the third reference point of the transmitted symbol y.
- time-domain position of the first subset corresponds to the time-domain position in the transmitted symbol y, which covers the first reference point of the first transmitted symbol (that is, the end position of the first transmitted symbol) Therefore, the following description is adopted: "The start position of the first subset corresponds to the position before the first reference point of the transmitted symbol y, and the end position of the first subset corresponds to the position after the first reference point of the transmitted symbol y position".
- step S1250 on the first set and the second set is given below in conjunction with FIG. 15.
- the transmission symbol y to be generated and the transmission symbol y+1 have the same first symbol component and second symbol component as an example, for example, the transmission symbol y is the transmission symbol 1 in FIG. 7, and the transmission symbol y +1 Transmit symbol 2 as shown in FIG. 7.
- FIG. 14 shows the correspondence relationship between the set and the transmitted symbol without performing step S1250 after performing the co-location copy operation on the first set and the second set. That is, the transmitted symbol y in FIG. 14 is obtained based on the first set after the co-location copy operation and has not been processed in step S1250, and the transmitted symbol y+1 is based on the co-location copy operation and has not been processed in step S1250. Of the second set.
- the first complex symbol may include a plurality of complex symbols.
- the subset formed by the first complex number symbol in the first set is the subset S1 shown in FIG. 14, and the subset formed by the first complex number symbol in the second set is the subset S2 shown in FIG. 14,
- the time domain positions of the subset S1 and the subset S2 are the same, that is, the start position of the subset S1 and the subset S2 are the same, and the end position is also the same.
- the symbol component D1 in the transmission symbol y is the same as the symbol component D2 in the transmission symbol y+1, and the time domain positions of the symbol component D1 and the symbol component D2 are the same.
- the subset S1 in the first set corresponds to the symbol component D1 in the transmission symbol y
- the subset S2 in the second set corresponds to the symbol component D2 in the transmission symbol y+1.
- FIG. 15 shows the correspondence relationship between the set and the transmitted symbol in the case of performing step S1250 after performing the co-location copy operation on the first set and the second set. That is, the transmitted symbol y in FIG. 15 is obtained based on the first set processed in step S1250 after the co-location copy operation, and the transmitted symbol y+1 is based on the first set processed in step S1250 after the co-location copy operation. Two sets are obtained.
- the symbol component D1 in the transmission symbol y is the same as the symbol component D2 in the transmission symbol y+1.
- the start position of the symbol component D1 is before the first reference point of the transmitted symbol y
- the end position of the symbol component D1 is after the first reference point of the transmitted symbol y (that is, the head of the transmitted symbol y).
- the symbol component The end position of D1 is after the third reference point of the transmitted symbol y.
- the start position of the symbol component D2 is located before the second reference point of the transmitted symbol y+1
- the end position of the symbol component D2 is located after the second reference point of the transmitted symbol y+1.
- the symbol component D1 in the transmission symbol y corresponds to the subset S1 in the first set
- the symbol component D2 in the transmission symbol y+1 corresponds to the subset S2 in the second set.
- the transmission symbol y is the transmission symbol 1 in FIG. 7, and the transmission symbol y+1 is the transmission symbol 2 shown in FIG. 7.
- the transmitted symbols are DFT-s-OFDM symbols
- step S1250 includes the following steps.
- IFFT is performed on the frequency domain signal corresponding to the first set and the frequency domain signal corresponding to the second set to obtain the time domain signal corresponding to the first set and the time domain signal corresponding to the second set.
- the time domain signal corresponding to the first set and the time domain signal corresponding to the second set are cyclically shifted, so that the starting position of the first subset corresponds to the position before the first reference point of the transmitted symbol y, and the first subset
- the end position of the set corresponds to the position after the first reference point of the transmitted symbol y
- the start position of the second subset corresponds to the position before the second reference point of the transmitted symbol y+1
- the position of the second subset The end position corresponds to the position after the second reference point of the transmitted symbol y+1.
- performing frequency domain processing on the first set and the second set refers to performing DFT on the first set and the second set.
- step S1250 the shift shown in FIG. 15 is realized by cyclic shift.
- step S1250 can be executed at the timing shown in 3 in FIG. 10.
- the transmitted symbols are DFT-s-OFDM symbols
- the process of generating DFT-s-OFDM symbols in this application is as shown in FIG. 16.
- the process includes the following steps.
- the coded bit stream is modulated to obtain multiple modulation symbols, the modulation symbols may be called complex symbols, and this step may correspond to step S1210.
- This step corresponds to step S1220.
- Performing a copy operation of complex symbols on multiple sets this step may correspond to step S1230.
- the M point frequency domain elements after DFT transformation are mapped to M consecutive subcarriers (not shown in FIG. 16), and the transmitter inserts zeros on subcarriers other than the M subcarriers or maps the remaining signals.
- the frequency domain signal is subjected to IFFT transformation. Performing cyclic shift on the signal after IFFT, this step may correspond to step S1250.
- CP is added to the cyclically shifted signal, and after parallel-to-serial conversion (P/S), a DFT-s-OFDM symbol is finally obtained. This step may correspond to step S1240.
- the grouping in the embodiment of the present application can be implemented through serial/parallel conversion (S/P).
- S/P serial/parallel conversion
- the transmitted symbols are DFT-s-OFDM symbols
- step S1250 includes the following operations.
- step S1250 the shift as shown in FIG. 15 is equivalently implemented by means of frequency domain weighting.
- step S1250 may be executed at the timing shown in 2 in FIG. 10.
- the transmitted symbols are DFT-s-OFDM symbols
- the process of generating DFT-s-OFDM symbols in this application includes the following steps.
- the coded bit stream is modulated to obtain multiple modulation symbols, the modulation symbols may be called complex symbols, and this step may correspond to step S1210. Group multiple complex symbols to obtain multiple sets.
- This step corresponds to step S1220.
- Performing a copy operation of complex symbols on multiple sets this step may correspond to step S1230.
- the frequency domain weighting is performed on the M-point frequency domain elements after the DFT change.
- the M point frequency domain elements after the frequency domain weighting are mapped to M consecutive subcarriers, and the transmitter inserts zeros on the subcarriers other than the M subcarriers or maps the remaining signals.
- the frequency domain signal is subjected to IFFT transformation. Performing cyclic shift on the signal after IFFT, this step may correspond to step S1250.
- a CP is added to the cyclically shifted signal to finally obtain a DFT-s-OFDM symbol. This step may correspond to step S1240.
- the weights used satisfy the following formula:
- C(k,l) represents the weight.
- j represents the plural symbol, namely
- N u represents the length of the symbol after IFFT excluding CP
- M represents the number of DFT points
- N u represents the length of the symbol after IFFT excluding CP
- M represents the number of DFT points
- o1 represents the starting symbol of the accumulation, and the value can be 0, 1, 2, etc.
- N 1 represents the initial shift value, and N 1 can be set.
- n 0 (1) M ⁇ N 1 /N u .
- n 0 (1) can be calculated by N 1.
- n 0 (1) can be directly defined through a protocol.
- the equivalent shift value of the transmission symbol with the symbol number l+1 is N CP,l+1 more than the equivalent shift value of the transmission symbol with the symbol number l.
- N CP,l+1 /N u can be directly defined through a protocol.
- the cyclic shift is performed after the copy operation and before the CP is added, for example, at the timing shown in 4 in FIG. 11.
- the transmitted symbols are DFT-s-OFDM symbols or SC-QAM symbols
- the signal processing in step S1250 includes cyclic shift
- this step S1250 includes the following operations: directly respond to step S1230
- the obtained first set and the second set are cyclically shifted, so that the start position of the first subset corresponds to the position before the first reference point of the transmitted symbol y, and the end position of the first subset corresponds to the transmitted symbol y
- the position after the first reference point of, and the start position of the second subset corresponds to the position before the second reference point of the transmitted symbol y+1, and the end position of the second subset corresponds to the transmitted symbol y+1
- This embodiment may perform the cyclic shift corresponding to the timing shown in 1 in FIG. 10, or this embodiment may perform the cyclic shift corresponding to the timing shown in 4 in FIG. 11.
- step S1230 is a co-location copy operation
- the copy operation makes the first set and the second set have part of the same complex number symbols, and the part of the same complex number symbols in the first set is formed into a child
- the set is marked as the first subset, and the subset formed by the same plural symbols in the second set is marked as the second subset.
- the time domain index of the starting position of the first subset is the same as the start of the second subset.
- the time domain index of the starting position is the same, where the time domain index of the starting position of the first subset is related to the length of the CP and the symbol number.
- the positions of the complex symbols participating in the copy operation can be determined according to the symbol numbers of the transmitted symbols.
- step S1230 a co-location copy operation is performed on the first set and the second set, where the time domain index i of the starting position of the first subset satisfies the following formula:
- A represents the time domain index of the first subset in the set whose symbol number 1 is 0.
- CL CP (l) represents the equivalent cumulative CP length of the first set of symbol number 1, and represents the time domain vector before the DFT of the sum of the CP lengths from the transmitted symbol with symbol number o1 to the transmitted symbol with symbol number l
- the equivalent length in, where o1 represents the starting symbol of the accumulation, and the value can be 0, 1, 2, etc.
- the CP lengths of transmission symbols with different symbol numbers may be the same or different.
- the equivalent cumulative CP length CL CP (l) of the set of symbol number l satisfies the following formula:
- N u denotes the length of a symbol after IFFT except CP
- N CP o o represents a symbol number as a set of shift values (CP length) after the IFFT
- O1 represents the accumulated start symbol
- the value can be 0, 1, 2, etc., Indicates rounding down. Downward values can be replaced with other rounding methods.
- the CPs of transmit symbols with different symbol numbers in the signal stream are all the same in length, then in the first set and the second set that have undergone the copy operation, the start position of the first subset is
- the time domain index i satisfies the following formula:
- A represents the time domain index of the first subset in the set whose symbol number 1 is 0.
- L CP represents the equivalent length of the CP length in the time domain vector before the DFT.
- step S1230 the time domain index of the start position of the first subset is the same as the time domain index of the start position of the second subset. Therefore, the time domain index of the start position of the second subset i also satisfies the above-mentioned following formula.
- the copy position (that is, the time domain index of the symbol component to be copied) for performing the copy operation on the two sets corresponding to the two transmitted symbols with symbol numbers l and l+1 is the same as the symbol number l+1 and The two sets corresponding to the two transmitted symbols of l+2 have different copy positions for the copy operation.
- FIG. 17 is a schematic diagram of the time domain structure after the co-location copy operation is performed on multiple sets corresponding to multiple time domain symbols that are continuous in the time domain.
- both set 1 and set 2 have a subset G1 composed of plural symbols, and the position of subset G1 in set 1 and set 2 is the same; set 2 and set 3 both have subset G2, and subset G2 has the same position in set 1 and set 2, and so on.
- L CP represents the equivalent length of the CP length in the time domain vector before the DFT.
- the first set may not be cyclically shifted, and only the second set may be cyclically shifted.
- Step S1230 includes: performing a copy operation on the first set and the second set, so that the first set and the second set have part of the same complex number symbols, and the subset of the part of the same complex number symbols in the first set is recorded as The first subset, the subset formed by this part of the same complex number in the second set is recorded as the second subset.
- the time domain index of the starting position of the first subset and the starting position of the second subset The time domain index is the same.
- the start position of the first subset corresponds to the position before the first reference point of the transmitted symbol y
- the end position of the first subset corresponds to the position after the first reference point of the transmitted symbol y
- the position of the second subset The starting position corresponds to the position before the first reference point of the transmit symbol y+1
- the end position of the second subset corresponds to the position after the first reference point of the transmit symbol y+1.
- the signal processing in step S1250 includes cyclic shift, where the cyclic shift step size for the first set is determined according to the length of the CP and the symbol number of the transmitted symbol y, and for the second set
- the cyclic shift step size of is related to the symbol number of the transmitted symbol y according to the length of the CP.
- the cyclic shift step size Z(l) of the set of symbol number l satisfies the following formula:
- Z 0 represents the cyclic shift step size of the set of symbol number 0
- It represents the equivalent cumulative CP length of the set of symbol number 1
- the CP lengths of transmission symbols with different symbol numbers may be the same or different.
- the CP lengths of transmit symbols of different symbol numbers in the signal stream are all the same, and the cyclic shift step size Z(l) of the set of symbol number 1 satisfies the following formula:
- Z 0 represents the cyclic shift step size of the set with the symbol number 0, and the cyclic shift step size of the set may be a preset value, for example, may be an empirical value.
- N CP represents the equivalent length of the CP length in the time domain vector after IFFT.
- FIG. 18 is a schematic diagram of performing a copy operation and signal processing (cyclic shift or frequency domain weighting) on multiple sets corresponding to multiple consecutive time domain symbols in the time domain.
- the 6 transmission symbols located in the time domain window of the transmission symbol in FIG. 18 represent the continuous transmission symbols in the time domain generated from the set 1 to set 6 processed by step S1230 and step S1250.
- the cyclic prefix (CP) of the transmitted symbol is not considered.
- the symbol numbers of transmission symbol 1 to transmission symbol 6 are 0, 1, ..., 5 in sequence.
- the transmission symbol 1 in FIG. 18 is the transmission symbol obtained by signal processing (cyclic shift or frequency domain weighting) of the set 1 in FIG. 17, and the transmission symbol 2 in FIG.
- the transmitted symbol obtained by signal processing (cyclic shift or frequency domain weighting) of set 2 of ,..., the transmitted symbol 6 in FIG. 18 is obtained by signal processing (cyclic shift or frequency domain weighting) of set 6 in FIG. 17 Launch symbol.
- the cyclic shift step size of the transmission symbol with the symbol number l+1 is different from the cyclic shift step size of the transmission symbol with the symbol number l by one CP length. It is assumed here that the CP lengths of transmitted symbols of different symbol numbers are the same.
- the embodiments of the application can be applied to generate DFT-s-OFDM symbols and SC-QAM symbols.
- the present application can also be applied to generate reference signals, such as reference signals such as a demodulation reference signal (DMRS).
- DMRS demodulation reference signal
- the reference signal is usually generated in the frequency domain and directly subjected to sub-carrier mapping.
- the copy operation in the embodiment of the present application is performed after transforming the frequency domain sequence of the reference signal to the sample value in the time domain.
- the reference signal is used to estimate the channel, in order to ensure the channel performance, it is not desirable that the reference signal contains time domain sampling points of other symbols.
- step S1230 if the transmission symbol x is a reference signal, and the transmission symbols before and after the transmission symbol x are all non-reference signals, then for the transmission symbol before the transmission symbol x (including the reference signal x) In step S1230, forward copying is used, and for the reference signal (including the reference signal x) after the transmitted symbol x, backward copying is used in step S1230.
- Figure 19 shows a schematic diagram of the time-domain structure of three transmission symbols (1,2,3).
- transmission symbol 2 is DMRS
- transmission symbol 1 and transmission symbol 2 are non-reference signals
- transmission symbol 2 corresponds to set 2 and transmission
- the copy relationship between the set 1 corresponding to the symbol 1 is forward copy
- the copy relationship between the set 2 corresponding to the transmitted symbol 2 and the set 3 corresponding to the transmitted symbol 3 is backward copy.
- the symbol component R1 whose end position is the second reference point in the transmission symbol 2 is copied to the transmission symbol 1
- the end position of the symbol component R1 copied to the transmission symbol 1 is the first reference point of the transmission symbol 1.
- the symbol component R2 whose ending position is the first reference point in the transmission symbol 2 is copied to the transmission symbol 3
- the ending position of the symbol component R2 copied to the transmission symbol 3 is the first reference point of the transmission symbol 3.
- the copy relationship of symbol 1 of symbol 2 is forward copy, that is, the symbol component R1 in DMRS is forward copied to symbol 1, and so on, the symbol component D0 of symbol 1 is forward copied to In the symbol before symbol 1 (not shown in Figure 19);
- the copy relationship between DMRS and symbol 3 is backward replication, that is, the symbol component R2 in DMRS is copied backward into symbol 3, and so on, the symbol 3 is The symbol component D3 of is copied to the symbol after symbol 2 (not shown in FIG. 19).
- this embodiment can not only implement the flexible configuration of the guard interval between symbols, but also ensure the accuracy of the reference signal, thereby ensuring the channel performance.
- Figure 20 shows a schematic diagram of the time domain structure of three transmission symbols (1,2,3).
- transmission symbol 2 is a DMRS
- transmission symbol 1 and transmission symbol 2 are non-reference signals
- transmission symbol 2 corresponds to set 2 and transmission
- the copy relationship between the set 1 corresponding to the symbol 1 is forward copy
- the copy relationship between the set 2 corresponding to the transmitted symbol 2 and the set 3 corresponding to the transmitted symbol 3 is backward copy.
- the symbol component R12 whose starting position is the second reference point in the transmission symbol 2 is copied to the transmission symbol 1
- the symbol component R12 whose starting position is copied to the transmission symbol 1 is the third position of the transmission symbol 1.
- Reference point, the symbol component R11 whose ending position is the second reference point in the transmission symbol 2 is copied to the transmission symbol 1
- the ending position of the symbol component R11 copied to the transmission symbol 1 is the first reference point of the transmission symbol 1.
- the symbol component R21 whose ending position is the first reference point in the transmission symbol 2 is copied to the transmission symbol 3.
- the ending position of the symbol component R21 copied to the transmission symbol 3 is the second reference point of the transmission symbol 3, and the symbol component R21 is copied to the second reference point of the transmission symbol 3.
- the symbol component R22 whose starting position is the third reference point is copied to the transmission symbol 3, and the starting position of the symbol component R22 copied to the transmission symbol 3 is the second reference point of the transmission symbol 3.
- the first reference point represents the end position of the transmitted symbol
- the second reference point represents the position of the intercepted CP of the transmitted symbol
- the third reference point represents the start position of the transmitted symbol (the end position of the CP), as shown in FIG. 20.
- the copy relationship between transmit symbol 2 and transmit symbol 1 is forward copy, that is, the symbol components R11 and R12 in DMRS are copied to symbol 1, and so on, the symbol component D0 in transmit symbol 1 Copy to the symbol before the symbol 1 (not shown in Figure 20);
- the copy relationship between the DMRS and the transmitted symbol 3 is backward copy, that is, the symbol components R21 and R22 in the DMRS are copied to the transmitted symbol 3, and so on,
- the symbol component in the transmission symbol 3 is copied to the symbol after the transmission symbol 2 (not shown in FIG. 20).
- this embodiment can not only implement the flexible configuration of the guard interval between symbols, but also ensure the accuracy of the reference signal, thereby ensuring the channel performance.
- this application proposes a method for symbol processing, and the method includes the following steps.
- Step 1) get multiple complex number symbols.
- Step 2 Divide multiple complex symbols into multiple sets.
- the multiple sets include a first set and a second set.
- the first set corresponds to the first transmission symbol
- the second set corresponds to the second transmission symbol
- the first transmission symbol It is continuous with the second transmission symbol in the time domain, the first transmission symbol is located before the second transmission symbol, and the complex symbols in the first subset in the first set are the same as the complex symbols in the second subset in the second set.
- the time domain vector corresponding to the first set is the same as the time domain vector corresponding to the second set.
- Step 3 signal processing is performed on the first set and the second set, the signal processing includes cyclic shift or frequency domain weighting, and the signal processing makes the starting position of the first subset correspond to before the first reference point of the first transmitted symbol
- the end position of the first subset corresponds to the position after the first reference point of the first transmission symbol
- the starting position of the second subset corresponds to the position before the second reference point of the second transmission symbol
- the end position of the second subset corresponds to the position after the second reference point of the second transmitted symbol.
- the first reference point represents the end position of the transmitted symbol
- the second reference point represents the position of the intercepted cyclic prefix of the transmitted symbol.
- the transmission symbols corresponding to the first set and the second set are reference signals, for example, DMRS.
- the first set and the second set are not copied.
- the transmitted symbols corresponding to the first set and the second set are reference signals, the accuracy of the reference signals can be guaranteed. , Can realize the flexible configuration of the guard interval of the reference signal.
- the embodiment of the present application can generate a time domain structure as shown in FIG. 3 by performing a copy operation on two sets corresponding to two consecutive transmitted symbols in the time domain and signal processing including cyclic shift or frequency domain weighting.
- the first transmission symbol and the second transmission symbol can realize flexible configuration of the guard interval between symbols under the premise of a fixed CP length.
- this application can be applied to short packet transmission.
- the first transmission symbol in the embodiment of the present application may be the first sub-transmission symbol in the second-type transmission symbol sequence, or the first transmission symbol may indicate any two adjacent sub-transmission symbols in the second-type transmission symbol sequence The previous sub-transmission symbol.
- the third transmission symbol in the embodiment of the present application may represent the last sub-transmission symbol of any two adjacent sub-transmission symbols in the second-type transmission symbol sequence.
- the second type of transmission symbol sequence represents a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- the cyclic prefix of the first sub-transmission symbol is added before performing DFT on the first set.
- the cyclic prefix of the first sub-transmission symbol may be added before performing DFT on the first set, or may be added before performing DFT on the first set.
- At least one sub-transmission symbol in the second-type transmission symbol sequence is a channel demodulation reference signal.
- the execution subject can be either a terminal device or a component (such as a chip or circuit) that can be used in a terminal device, or a network device or a component that can be used in a network device (such as a chip or circuit). ).
- FIG. 21 is a schematic block diagram of a communication device 2100 according to an embodiment of the application.
- the communication device 2100 includes a transceiver unit 2110 and a processing unit 2120.
- the transceiver unit 2110 can communicate with the outside, and the processing unit 2110 is used for data processing.
- the transceiving unit 2110 may also be referred to as a communication interface or a communication unit.
- the communication device 2100 can be used to perform the actions performed by the sending end in the above method embodiments, and can also be used to perform the actions performed by the receiving end in the above method embodiments.
- the communication device 2100 may be a terminal device or a network device.
- the communication device 2100 is used to perform the actions performed by the sending end in the above method embodiments.
- the processing unit 2120 is configured to generate the first transmission symbol in the transmission symbol sequence, the first transmission symbol and the second transmission symbol have the same first symbol component, and the starting position of the first symbol component in the first transmission symbol is the first symbol component.
- the starting position of a transmission symbol, the starting position of the first symbol component in the second transmission symbol is the position where the cyclic prefix of the second transmission symbol is intercepted, and the second transmission symbol is the next transmission adjacent to the first transmission symbol Symbol, the first transmission symbol and the second transmission symbol both have a cyclic prefix.
- the transceiver unit 2110 is configured to send the first transmission symbol.
- the first transmission symbol is the first transmission symbol in the transmission symbol sequence.
- the processing unit 2120 is further configured to generate a third transmission symbol in the transmission symbol sequence, the third transmission symbol and the fourth transmission symbol have the same second symbol component, and the second symbol component is in the third transmission symbol.
- the end position is the position where the cyclic prefix of the third transmission symbol is intercepted, the end position of the second symbol component in the fourth transmission symbol is the end position of the fourth transmission symbol, and the fourth transmission symbol is the front adjacent to the third transmission symbol.
- the last transmitted symbol, the third transmitted symbol, and the fourth transmitted symbol all have a cyclic prefix.
- the transceiver unit 2110 is also used to send the third transmit symbol.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- At least one sub-transmission symbol in the transmission symbol sequence is a channel demodulation reference signal.
- the processing unit 2120 is configured to: obtain a plurality of complex symbols; divide the plurality of complex symbols into a plurality of sets, wherein each set corresponds to one transmission symbol, and the plurality of sets include a first set corresponding to the first transmission symbol A second set corresponding to the second transmitted symbol; a copy operation is performed on the first set and the second set so that there are partially identical complex symbols between the first set and the second set; the first transmitted symbol is generated based on the first set.
- processing unit 2120 is configured to execute steps S1210 to S1240 above.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol, wherein when the first transmission symbol is not the first transmission symbol of the transmission sequence, the cyclic prefix of the first transmission symbol is Added before performing Discrete Fourier Transform DFT on the first set.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol, wherein, when the first transmission symbol is the first transmission symbol of the transmission sequence, the cyclic prefix of the first transmission symbol is Added after performing Discrete Fourier Transform DFT on the first set.
- the communication device 2100 is used to perform the actions performed by the receiving end in the above method embodiments.
- the processing unit 2120 is configured to determine a first receiving window for receiving a first transmission symbol in a transmission symbol sequence, the first transmission symbol and the second transmission symbol have the same first symbol component, and the first symbol component is in the first transmission symbol.
- the starting position in the transmission symbol is the starting position of the first transmission symbol
- the starting position of the first symbol component in the second transmission symbol is the position where the cyclic prefix of the second transmission symbol is intercepted
- the second transmission symbol is the same as the first transmission symbol.
- the transceiver unit 2110 is configured to receive the first transmitted symbol by using the adjusted first receiving window.
- the processing unit 2120 is configured to move the time of the first receiving window back by a first step length, and the first step length is not greater than the length of the first symbol component.
- the first transmission symbol is the first transmission symbol of the transmission symbol sequence.
- the processing unit 2120 is further configured to determine a third receiving window for receiving a third transmit symbol in the transmit symbol sequence, the third transmit symbol and the fourth transmit symbol have the same second symbol component, and the second symbol
- the end position of the component in the third transmission symbol is the position of the intercepted cyclic prefix of the third transmission symbol
- the end position of the second symbol component in the fourth transmission symbol is the end position of the fourth transmission symbol
- the fourth transmission symbol is and The previous transmission symbol adjacent to the third transmission symbol, the third transmission symbol and the fourth transmission symbol both have a cyclic prefix.
- the transceiver unit 2110 is further configured to receive the third transmission symbol by using the third receiving window.
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- At least one sub-transmission symbol in the transmission symbol sequence is a channel demodulation reference signal.
- the processing unit 2120 is configured to generate the first sub-transmission symbol in the transmission symbol sequence, where ,
- the transmission symbol sequence is a transmission symbol sequence composed of multiple sub-transmission symbols obtained by processing a single transmission symbol.
- the transceiver unit 2110 is configured to send the first sub-transmission symbol.
- the first sub-transmission symbol and the second sub-transmission symbol have the same first symbol component
- the start position of the first symbol component in the first sub-transmission symbol is the start position of the first transmission symbol
- the start position in the second sub-transmission symbol is the position where the cyclic prefix of the second transmission symbol is intercepted
- the second sub-transmission symbol is the next transmission symbol adjacent to the first sub-transmission symbol
- the first sub-transmission symbol is the same as the Both sub-transmission symbols have a cyclic prefix
- the first sub-transmission symbol and the third sub-transmission symbol have the same second symbol component, and the end position of the second symbol component in the first sub-transmission symbol is the position where the cyclic prefix of the first sub-transmission symbol is intercepted, and the second symbol component
- the end position in the third sub-transmission symbol is the end position of the third sub-transmission symbol
- the third sub-transmission symbol is the previous transmission symbol adjacent to the first sub-transmission symbol
- the first sub-transmission symbol and the third sub-transmission The symbols all have a cyclic prefix.
- the first sub-transmission symbol is the first sub-transmission symbol of the transmission symbol sequence.
- the first sub-transmission symbol when the first sub-transmission symbol is not the first sub-transmission symbol of the transmission sequence, the first sub-transmission symbol does not include the first symbol component.
- an embodiment of the present application also provides a symbol processing apparatus 2200.
- the device 2200 is configured to execute step S1210 to step S1240 in the foregoing method embodiment.
- the device 2200 is further configured to execute step S1250.
- the device 2200 may include the following units.
- the obtaining unit 2210 is configured to perform step S1210.
- the grouping unit 2220 is configured to perform step S1220.
- the copy unit 2230 is configured to perform step S1230.
- the signal processing unit 2240 is configured to perform step S1250.
- the symbol generating unit 2250 is configured to perform step S1240.
- the acquiring unit 2210 may include a modulation sub-unit for modulating the encoded bit stream to obtain modulation symbols, and the modulation symbols may also be referred to as complex symbols.
- the obtaining unit 2210 is configured to obtain a plurality of complex symbols according to the phase PTRS sampling points and modulation symbols, and use the grouping unit 2220 for processing.
- the symbol generating unit 2250 may include a DFT subunit, a subcarrier mapping subunit, an IFFT subunit, and a CP adding subunit.
- the signal processing unit 2240 is located between the copying unit 2230 and the symbol generating unit 2250.
- the signal processing unit 2240 may be referred to as a cyclic shift unit.
- the signal processing unit 2240 may be located in the symbol generating unit 2250.
- the signal processing unit 2240 is located between the DFT subunit and the IFFT subunit.
- the signal processing unit 2240 may be referred to as a frequency domain weighting unit.
- the signal processing unit 2240 is located between the IFFT subunit and the CP adding subunit.
- the signal processing unit 2240 may be referred to as a cyclic shift unit.
- the symbol generation unit 2250 may include a CP subunit, an upsampling subunit, and a filtering subunit.
- the signal processing unit 2240 may be referred to as a cyclic shift unit.
- the acquiring unit 2210, the grouping unit 2220, the copying unit 2230, and the signal processing unit 2240 (or, the symbol generating unit 2250) can be implemented by software, or by hardware, or by hardware and Realized by software.
- the acquiring unit 2210, the grouping unit 2220, the copying unit 2230, and the signal processing unit 2240 (or the symbol generating unit 2250) may also be different chips, or they may be integrated on one chip or integrated circuit.
- the acquisition unit 2210, the grouping unit 2220, the copy unit 2230, the signal processing unit 2240, and the symbol generation unit 2250 may all be implemented by a processor or processor-related circuits.
- an embodiment of the present application further provides an apparatus 2500 for symbol processing.
- the device 2500 includes a processor 2510, a memory 2520, and a transceiver 2530.
- the memory 2520 stores a program.
- the processor 2510 is used to execute the program stored in the memory 2520, and executes the program stored in the memory 2520, so that the device 2500 is used to execute The above method embodiment.
- the embodiment of the present application also provides a communication device, and the communication device may be a terminal device or a chip.
- the communication device can be used to execute the above method embodiments.
- FIG. 26 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate.
- the terminal device uses a mobile phone as an example.
- the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
- the processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program.
- the memory is mainly used to store software programs and data.
- the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
- the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
- Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.
- the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
- the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna.
- the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
- FIG. 26 only one memory and processor are shown in FIG. 26. In an actual terminal device product, there may be one or more processors and one or more memories.
- the memory may also be referred to as a storage medium or storage device.
- the memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.
- the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device.
- the terminal device includes a transceiver unit 2610 and a processing unit 2620.
- the transceiving unit 2610 may also be referred to as a transceiver, a transceiver, a transceiving device, and so on.
- the processing unit 2620 may also be called a processor, a processing board, a processing module, a processing device, and so on.
- the device for implementing the receiving function in the transceiver unit 2610 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 2610 as the sending unit, that is, the transceiver unit 2610 includes a receiving unit and a sending unit.
- the transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit.
- the receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit.
- the transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.
- the processing unit 2620 is configured to execute the foregoing method embodiment.
- the transceiver unit 2610 is used for the related transceiver operations in the foregoing method embodiments.
- the transceiver unit 2610 is used to transmit or receive DFT-s-OFDM symbols or SC-QAM symbols.
- FIG. 26 is only an example and not a limitation, and the foregoing terminal device including a transceiver unit and a processing unit may not rely on the structure shown in FIG. 26.
- the chip When the communication device is a chip, the chip includes a transceiver unit and a processing unit.
- the transceiver unit may be an input/output circuit or a communication interface;
- the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.
- the embodiment of the present application also provides a communication device, and the communication device may be a network device or a chip.
- the communication device can be used to execute the above method embodiments.
- the communication device is a network device, for example, it is a base station.
- FIG 21 shows a simplified schematic diagram of the base station structure.
- the base station includes 2710 parts and 2720 parts.
- the 2710 part is mainly used for receiving and sending radio frequency signals and the conversion between radio frequency signals and baseband signals; the 2720 part is mainly used for baseband processing and controlling the base station.
- the 2710 part can generally be called a transceiver unit, transceiver, transceiver circuit, or transceiver.
- the 2720 part is usually the control center of the base station, and can usually be referred to as a processing unit, which is used to control the base station to perform the processing operations on the network device side in the foregoing method embodiments.
- the transceiver unit of part 2710 may also be called a transceiver or a transceiver, etc., which includes an antenna and a radio frequency unit, and the radio frequency unit is mainly used for radio frequency processing.
- the device for implementing the receiving function in part 2710 can be regarded as the receiving unit, and the device for implementing the sending function as the sending unit, that is, the part 2710 includes the receiving unit and the sending unit.
- the receiving unit may also be called a receiver, a receiver, or a receiving circuit
- the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
- the 2720 part may include one or more single boards, and each single board may include one or more processors and one or more memories.
- the processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processing at the same time. Device.
- part 2720 is used to execute the foregoing method embodiment.
- the 2710 part is used for the related transceiving operations in the above method embodiment.
- part 2710 is used to transmit or receive DFT-s-OFDM symbols or SC-QAM symbols.
- FIG. 21 is only an example and not a limitation, and the foregoing network device including a transceiving unit and a processing unit may not rely on the structure shown in FIG. 21.
- the chip When the communication device is a chip, the chip includes a transceiver unit and a processing unit.
- the transceiver unit may be an input/output circuit or a communication interface;
- the processing unit is a processor, microprocessor, or integrated circuit integrated on the chip.
- terminal devices in the embodiments of the present application include handheld devices, vehicle-mounted devices, wearable devices, or computing devices with wireless communication functions.
- terminal equipment may refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless communication equipment, User agent or user device.
- the terminal device may be a mobile phone, a tablet computer, or a computer with wireless transceiver function.
- Terminal equipment can also be virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminals in industrial control, wireless terminals in unmanned driving, wireless terminals in telemedicine, and smart Wireless terminals in power grids, wireless terminals in smart cities, and wireless terminals in smart homes.
- the terminal device may be a terminal device in a 5G network or a terminal device in a public land mobile network (PLMN) that will evolve in the future.
- PLMN public land mobile network
- the network equipment in the embodiments of this application can be used to communicate with one or more terminal devices, and can also be used to communicate with one or more base stations with partial terminal functions (such as macro base stations and micro base stations, such as access points). , The communication between). Network equipment can be called a base station. Base stations may come in many forms, such as macro base stations, micro base stations, relay stations, and access points. Exemplarily, the network equipment involved in the embodiments of the present application may be a base station in a new radio (NR), or may be a global system for mobile communication (GSM) or code division multiple access (code division multiple access).
- NR new radio
- GSM global system for mobile communication
- code division multiple access code division multiple access
- the base transceiver station (BTS) in division multiple access (CDMA) can also be the node B (NB) in the wideband code division multiple access (WCDMA) system, or it can be An evolved Node B (evolutional Node B, eNB or eNodeB) in a long term evolution (LTE) system.
- NB node B
- WCDMA wideband code division multiple access
- eNB evolved Node B
- LTE long term evolution
- the base station in 5G NR may also be called a transmission reception point (TRP) or next generation Node B (gNB).
- TRP transmission reception point
- gNB next generation Node B
- the embodiments of the present application also provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, the computer realizes the foregoing method embodiments.
- the embodiments of the present application also provide a computer program product containing instructions, which when executed by a computer causes the computer to implement the foregoing method embodiments.
- the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
- the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
- the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems or windows operating systems.
- the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
- the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application.
- the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.
- various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques.
- article of manufacture used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
- computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
- various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
- machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
- processors mentioned in the embodiment of this application may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processors, DSPs), and application-specific integrated circuits (Central Processing Unit, CPU).
- CPU Central Processing Unit
- DSPs Digital Signal Processors
- CPU Application Specific Integrated Circuit
- FPGA Field Programmable Gate Array
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
- the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
- the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
- the volatile memory may be random access memory (Random Access Memory, RAM), which is used as an external cache.
- RAM static random access memory
- DRAM dynamic random access memory
- DRAM synchronous dynamic random access memory
- DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
- Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
- Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
- DR RAM Direct Rambus RAM
- the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
- the memory storage module
- the disclosed system, device, and method may be implemented in other ways.
- the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .
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Abstract
Description
Claims (43)
- 一种符号处理的方法,其特征在于,包括:生成发射符号序列中的第一发射符号,所述第一发射符号与第二发射符号具有相同的第一符号分量,所述第一符号分量在所述第一发射符号中的起始位置为所述第一发射符号的起始位置,所述第一符号分量在所述第二发射符号中的起始位置为所述第二发射符号的截取循环前缀的位置,所述第二发射符号为与所述第一发射符号相邻的下一个发射符号,所述第一发射符号与所述第二发射符号均具有循环前缀;发送所述第一发射符号。
- 根据权利要求1所述的方法,其特征在于,所述第一发射符号为所述发射符号序列中的首个发射符号。
- 根据权利要求1或2所述的方法,其特征在于,所述方法还包括:生成所述发射符号序列中的第三发射符号,所述第三发射符号与第四发射符号具有相同的第二符号分量,所述第二符号分量在所述第三发射符号中的结束位置为所述第三发射符号的截取循环前缀的位置,所述第二符号分量在所述第四发射符号中的结束位置为所述第四发射符号的结束位置,所述第四发射符号为与所述第三发射符号相邻的前一个发射符号,所述第三发射符号与所述第四发射符号均具有循环前缀;发送所述第三发射符号。
- 根据权利要求1至3中任一项所述的方法,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列。
- 根据权利要求4所述的方法,其特征在于,所述发射符号序列中至少有一个子发射符号为信道解调参考信号。
- 根据权利要求1至5中任一项所述的方法,其特征在于,生成发射符号序列中的第一发射符号,包括:获得多个复数符号;将所述多个复数符号分为多个集合,其中,每个集合对应一个发射符号,所述多个集合包括对应所述第一发射符号的第一集合与对应所述第二发射符号的第二集合;对所述第一集合与所述第二集合进行复制操作,使得所述第一集合与所述第二集合之间具有部分相同的复数符号;基于所述第一集合生成所述第一发射符号。
- 根据权利要求6所述的方法,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列,其中,当所述第一发射符号非所述发射序列的首个发射符号时,所述第一发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之前添加的。
- 根据权利要求6所述的方法,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列,其中,当所述第一发射符号为所述发射序列的首个发射符号时,所述第一发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之后添加的。
- 一种符号处理的方法,其特征在于,包括:确定用于接收发射符号序列中的第一发射符号的第一接收窗,所述第一发射符号与第二发射符号具有相同的第一符号分量,所述第一符号分量在所述第一发射符号中的起始位置为所述第一发射符号的起始位置,所述第一符号分量在所述第二发射符号中的起始位置为所述第二发射符号的截取循环前缀的位置,所述第二发射符号为与所述第一发射符号相邻的后一个发射符号,所述第一发射符号与所述第二发射符号均具有循环前缀;调整所述第一接收窗的时间,使得第一接收窗能够完整接收所述第一发射符号;利用调整后的所述第一接收窗接收所述第一发射符号。
- 根据权利要求9所述的方法,其特征在于,调整所述第一接收窗的时间,包括:将所述第一接收窗的时间后移第一步长,所述第一步长不大于所述第一符号分量的长度。
- 根据权利要求9或10所述的方法,其特征在于,所述第一发射符号为所述发射符号序列的首个发射符号。
- 根据权利要求9至11中任一项所述的方法,其特征在于,所述方法还包括:确定用于接收所述发射符号序列中的第三发射符号的第三接收窗,所述第三发射符号与第四发射符号具有相同的第二符号分量,所述第二符号分量在所述第三发射符号中的结束位置为所述第三发射符号的截取循环前缀的位置,所述第二符号分量在所述第四发射符号中的结束位置为所述第四发射符号的结束位置,所述第四发射符号为与所述第三发射符号相邻的前一个发射符号,所述第三发射符号与所述第四发射符号均具有循环前缀;利用所述第三接收窗接收所述第三发射符号。
- 根据权利要求9至12中任一项所述的方法,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列。
- 根据权利要求13所述的方法,其特征在于,所述发射符号序列中至少有一个子发射符号为信道解调参考信号。
- 一种符号处理的方法,其特征在于,包括:生成发射符号序列中的第一子发射符号,其中,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列;发送所述第一子发射符号,其中,所述第一子发射符号与第二子发射符号具有相同的第一符号分量,所述第一符号分量在所述第一子发射符号中的起始位置为所述第一发射符号的起始位置,所述第一符号分量在所述第二子发射符号中的起始位置为所述第二发射符号的截取循环前缀的位置,所述第二子发射符号为与所述第一子发射符号相邻的后一个发射符号,所述第一子发射符号与所述第二子发射符号均具有循环前缀;和/或所述第一子发射符号与第三子发射符号具有相同的第二符号分量,所述第二符号分量在所述第一子发射符号中的结束位置为所述第一子发射符号的截取循环前缀的位置,所述第二符号分量在所述第三子发射符号中的结束位置为所述第三子发射符号的结束位置,所述第三子发射符号为与所述第一子发射符号相邻的前一个发射符号,所述第一子发射符号与所述第三子发射符号均具有循环前缀。
- 根据权利要求15所述的方法,其特征在于,所述第一子发射符号为所述发射符 号序列的首个子发射符号。
- 根据权利要求15所述的方法,其特征在于,当所述第一子发射符号非所述发射序列的首个子发射符号时,所述第一子发射符号不包括所述第一符号分量。
- 根据权利要求15至17中任一项所述的方法,其特征在于,生成发射符号序列中的第一子发射符号,包括:获得多个复数符号;将所述多个复数符号分为多个集合,其中,每个集合对应一个发射符号,所述多个集合包括对应所述第一发射符号的第一集合与对应所述第二发射符号的第二集合;对所述第一集合与所述第二集合进行复制操作,使得所述第一集合与所述第二集合之间具有部分相同的复数符号;基于所述第一集合生成所述第一子发射符号。
- 根据权利要求18所述的方法,其特征在于,当所述第一子发射符号非所述发射序列的首个子发射符号时,所述第一子发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之前添加的。
- 根据权利要求18所述的方法,其特征在于,当所述第一子发射符号为所述发射序列的首个子发射符号时,所述第一子发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之后添加的。
- 一种符号处理的装置,其特征在于,包括:处理单元,用于生成发射符号序列中的第一发射符号,所述第一发射符号与第二发射符号具有相同的第一符号分量,所述第一符号分量在所述第一发射符号中的起始位置为所述第一发射符号的起始位置,所述第一符号分量在所述第二发射符号中的起始位置为所述第二发射符号的截取循环前缀的位置,所述第二发射符号为与所述第一发射符号相邻的后一个发射符号,所述第一发射符号与所述第二发射符号均具有循环前缀;收发单元,用于发送所述第一发射符号。
- 根据权利要求21所述的装置,其特征在于,所述第一发射符号为所述发射符号序列中的首个发射符号。
- 根据权利要求21或22所述的装置,其特征在于,所述处理单元还用于,生成所述发射符号序列中的第三发射符号,所述第三发射符号与第四发射符号具有相同的第二符号分量,所述第二符号分量在所述第三发射符号中的结束位置为所述第三发射符号的截取循环前缀的位置,所述第二符号分量在所述第四发射符号中的结束位置为所述第四发射符号的结束位置,所述第四发射符号为与所述第三发射符号相邻的前上一个发射符号,所述第三发射符号与所述第四发射符号均具有循环前缀;所述收发单元,还用于发送所述第三发射符号。
- 根据权利要求21至23中任一项所述的装置,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列。
- 根据权利要求24所述的装置,其特征在于,所述发射符号序列中至少有一个子发射符号为信道解调参考信号。
- 根据权利要求21至25中任一项所述的装置,其特征在于,所述处理单元用于:获得多个复数符号;将所述多个复数符号分为多个集合,其中,每个集合对应一个发射符号,所述多个集合包括对应所述第一发射符号的第一集合与对应所述第二发射符号的第二集合;对所述第一集合与所述第二集合进行复制操作,使得所述第一集合与所述第二集合之间具有部分相同的复数符号;基于所述第一集合生成所述第一发射符号。
- 根据权利要求26所述的装置,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列,其中,当所述第一发射符号非所述发射序列的首个发射符号时,所述第一发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之前添加的。
- 根据权利要求26所述的装置,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列,其中,当所述第一发射符号为所述发射序列的首个发射符号时,所述第一发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之后添加的。
- 一种符号处理的装置,其特征在于,包括:处理单元,用于:确定用于接收发射符号序列中的第一发射符号的第一接收窗,所述第一发射符号与第二发射符号具有相同的第一符号分量,所述第一符号分量在所述第一发射符号中的起始位置为所述第一发射符号的起始位置,所述第一符号分量在所述第二发射符号中的起始位置为所述第二发射符号的截取循环前缀的位置,所述第二发射符号为与所述第一发射符号相邻的一个发射符号,所述第一发射符号与所述第二发射符号均具有循环前缀;调整所述第一接收窗的时间,使得第一接收窗能够完整接收所述第一发射符号;收发单元,用于利用调整后的所述第一接收窗接收所述第一发射符号。
- 根据权利要求29所述的装置,其特征在于,所述处理单元用于,将所述第一接收窗的时间后移第一步长,所述第一步长不大于所述第一符号分量的长度。
- 根据权利要求29或30所述的装置,其特征在于,所述第一发射符号为所述发射符号序列的首个发射符号。
- 根据权利要求29至31中任一项所述的装置,其特征在于,所述处理单元还用于,确定用于接收所述发射符号序列中的第三发射符号的第三接收窗,所述第三发射符号与第四发射符号具有相同的第二符号分量,所述第二符号分量在所述第三发射符号中的结束位置为所述第三发射符号的截取循环前缀的位置,所述第二符号分量在所述第四发射符号中的结束位置为所述第四发射符号的结束位置,所述第四发射符号为与所述第三发射符号相邻的前一个发射符号,所述第三发射符号与所述第四发射符号均具有循环前缀;所述收发单元还用于,利用所述第三接收窗接收所述第三发射符号。
- 根据权利要求29至32中任一项所述的装置,其特征在于,所述发射符号序列为基于单个发射符号处理得到的多个子发射符号构成的发射符号序列。
- 根据权利要求33所述的装置,其特征在于,所述发射符号序列中至少有一个子发射符号为信道解调参考信号。
- 一种符号处理的装置,其特征在于,包括:处理单元,用于生成发射符号序列中的第一子发射符号,其中,所述发射符号序列为 基于单个发射符号处理得到的多个子发射符号构成的发射符号序列;收发单元,用于发送所述第一子发射符号,其中,所述第一子发射符号与第二子发射符号具有相同的第一符号分量,所述第一符号分量在所述第一子发射符号中的起始位置为所述第一发射符号的起始位置,所述第一符号分量在所述第二子发射符号中的起始位置为所述第二发射符号的截取循环前缀的位置,所述第二子发射符号为与所述第一子发射符号相邻的后一个发射符号,所述第一子发射符号与所述第二子发射符号均具有循环前缀;和/或所述第一子发射符号与第三子发射符号具有相同的第二符号分量,所述第二符号分量在所述第一子发射符号中的结束位置为所述第一子发射符号的截取循环前缀的位置,所述第二符号分量在所述第三子发射符号中的结束位置为所述第三子发射符号的结束位置,所述第三子发射符号为与所述第一子发射符号相邻的前一个发射符号,所述第一子发射符号与所述第三子发射符号均具有循环前缀。
- 根据权利要求35所述的装置,其特征在于,所述第一子发射符号为所述发射符号序列的首个子发射符号。
- 根据权利要求35所述的装置,其特征在于,当所述第一子发射符号非所述发射序列的首个子发射符号时,所述第一子发射符号不包括所述第一符号分量。
- 根据权利要求35至37中任一项所述的装置,其特征在于,所述处理单元用于:获得多个复数符号;将所述多个复数符号分为多个集合,其中,每个集合对应一个发射符号,所述多个集合包括对应所述第一发射符号的第一集合与对应所述第二发射符号的第二集合;对所述第一集合与所述第二集合进行复制操作,使得所述第一集合与所述第二集合之间具有部分相同的复数符号;基于所述第一集合生成所述第一子发射符号。
- 根据权利要求38所述的装置,其特征在于,当所述第一子发射符号非所述发射序列的首个子发射符号时,所述第一子发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之前添加的。
- 根据权利要求38所述的装置,其特征在于,当所述第一子发射符号为所述发射序列的首个子发射符号时,所述第一子发射符号的循环前缀是在对所述第一集合进行离散傅里叶变换DFT之后添加的。
- 一种通信装置,其特征在于,包括:存储器,用于存储指令;处理器,用于执行所述存储器存储的指令,所述处理器对所述存储器存储的指令的执行,使得所述通信装置执行如权利要求1至8中任一项所述的方法,或者,如权利要求9至14中任一项所述的方法,或者,如权利要求15至20中任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,其上存储有计算机程序,所述计算机程序被计算机执行时,使得所述计算机实现如权利要求1至8中任一项所述的方法,或者,如权利要求9至14中任一项所述的方法,或者,如权利要求15至20中任一项所述的方法。
- 一种包含指令的计算机程序产品,其特征在于,所述指令被计算机执行时,使得 所述计算机实现如权利要求1至8中任一项所述的方法,或者,如权利要求9至14中任一项所述的方法,或者,如权利要求15至20中任一项所述的方法。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1881968A (zh) * | 2005-06-15 | 2006-12-20 | 华为技术有限公司 | 一种减小多径延迟干扰的数据传输方法 |
US20160099824A1 (en) * | 2014-10-01 | 2016-04-07 | Telefonica, S.A. | Method and system of cyclic prefix overhead reduction for enabling cancellation of inter-symbol and inter-carrier interferences in ofdm wireless communication networks |
CN107852254A (zh) * | 2015-01-30 | 2018-03-27 | 华为技术有限公司 | 用于通过有条件零填充传输数据的装置和方法 |
CN108366028A (zh) * | 2017-01-26 | 2018-08-03 | 华为技术有限公司 | 一种循环前缀cp确定方法及无线网络设备 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7778336B1 (en) * | 2005-02-09 | 2010-08-17 | Marvell International Ltd. | Timing and frequency synchronization of OFDM signals for changing channel conditions |
WO2008056901A1 (en) * | 2006-11-10 | 2008-05-15 | Electronics And Telecommunications Research Institute | Transmitter for extending guard interval for individual user equipment in ofdma systems |
US20090040919A1 (en) * | 2007-08-09 | 2009-02-12 | Tarik Muharemovic | Transmission Using Nested OFDMA |
KR100904533B1 (ko) * | 2008-01-11 | 2009-06-25 | 엘지전자 주식회사 | 전송 타이밍 조절 방법, 연속적인 패킷 전송 방법 및 이동통신 단말 |
ES2376606T3 (es) * | 2008-06-13 | 2012-03-15 | Telefonaktiebolaget L M Ericsson (Publ) | Métodos y disposiciones en un sistema de comunicaciones inal�?mbricas para producir una estructura de señal con prefijo c�?clico. |
US8724542B2 (en) * | 2008-08-04 | 2014-05-13 | Texas Instruments Incorporated | Transmission using nested OFDMA |
US9608780B2 (en) * | 2008-09-23 | 2017-03-28 | Qualcomm Incorporated | Transmit diversity for SC-FDMA |
US8848742B2 (en) * | 2009-10-15 | 2014-09-30 | Qualcomm Incorporated | Transmission strategy in MBSFN subframes |
US10461975B2 (en) * | 2016-05-11 | 2019-10-29 | Qualcomm Incorporated | Dynamic cyclic prefix (CP) length in wireless communication |
US10848359B2 (en) * | 2016-09-30 | 2020-11-24 | Qualcomm Incorporated | Virtual symbol splitting techniques in wireless communications |
US10419188B2 (en) * | 2017-03-24 | 2019-09-17 | Qualcomm Incorporated | Virtual time-domain multiplexing for reference signals and data with modified cyclic prefix |
-
2019
- 2019-11-01 CN CN201980101452.XA patent/CN114556875B/zh active Active
- 2019-11-01 EP EP19950712.0A patent/EP4033708A4/en active Pending
- 2019-11-01 WO PCT/CN2019/115142 patent/WO2021082008A1/zh unknown
- 2019-11-01 AU AU2019472104A patent/AU2019472104B2/en active Active
-
2022
- 2022-04-28 US US17/731,326 patent/US11843485B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1881968A (zh) * | 2005-06-15 | 2006-12-20 | 华为技术有限公司 | 一种减小多径延迟干扰的数据传输方法 |
US20160099824A1 (en) * | 2014-10-01 | 2016-04-07 | Telefonica, S.A. | Method and system of cyclic prefix overhead reduction for enabling cancellation of inter-symbol and inter-carrier interferences in ofdm wireless communication networks |
CN107852254A (zh) * | 2015-01-30 | 2018-03-27 | 华为技术有限公司 | 用于通过有条件零填充传输数据的装置和方法 |
CN108366028A (zh) * | 2017-01-26 | 2018-08-03 | 华为技术有限公司 | 一种循环前缀cp确定方法及无线网络设备 |
Non-Patent Citations (3)
Title |
---|
ERICSSON: "NPRACH range enhancements for NB-IoT", 3GPP TSG-RAN WG1#91 R1-1719368, 1 December 2017 (2017-12-01), XP051368795 * |
SAMSUNG: "Symbol alignment for different CP overhead", 3GPP DRAFT; R1-1612444 SYMBOL ALIGNMENT FOR DIFFERENT CP OVERHEAD-SAMSUNG, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20161114 - 20161118, 4 November 2016 (2016-11-04), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051189330 * |
See also references of EP4033708A4 * |
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AU2019472104B2 (en) | 2024-01-25 |
EP4033708A1 (en) | 2022-07-27 |
CN114556875B (zh) | 2023-11-17 |
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