WO2017167268A1 - 一种脉冲成型方法、发射机、接收机及系统 - Google Patents
一种脉冲成型方法、发射机、接收机及系统 Download PDFInfo
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- WO2017167268A1 WO2017167268A1 PCT/CN2017/078991 CN2017078991W WO2017167268A1 WO 2017167268 A1 WO2017167268 A1 WO 2017167268A1 CN 2017078991 W CN2017078991 W CN 2017078991W WO 2017167268 A1 WO2017167268 A1 WO 2017167268A1
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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
- H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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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
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03834—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using pulse shaping
- H04L25/0384—Design of pulse shapes
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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
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
Definitions
- the present application relates to the field of communications, and in particular, to a pulse forming method, a transmitter, a receiver, and a system.
- Orthogonal Frequency Division Multiplexing (OFDM) system is the most widely used communication system in recent years, for example, a Long Term Evolution (LTE) system.
- LTE Long Term Evolution
- the next-generation communication system not only needs to improve the performance, but also needs to support the new service type through the design of the new air interface. That is to say, based on the traditional Mobile BroadBand (MBB) service, it also needs to support Machine-To-Machine (M2M), Man-Compute-Communication (MCC), and other rich and varied new technologies. Increased services, such as Ultra-reliable and Low Latency Communications (uMTC) and Massive Machine Type Communications (MMTC).
- M2M Machine-To-Machine
- MCC Man-Compute-Communication
- Increased services such as Ultra-reliable and Low Latency Communications (uMTC) and Massive Machine Type Communications (MMTC).
- uMTC Ultra-reliable and Low Latency Communications
- MMTC Massive Machine Type Communications
- the new air interface technology includes multiple dimensions of coding, waveform, multiple access and frame structure. Among them, waveform technology is the key link to achieve multi-service flexible support, which is very important for the new air interface
- CP-OFDM Cyclic Prefix
- OFDM Orthogonal Frequency Division Multiplexing
- ACLR Adjacent Channel Leakage Ratio
- OOBE Out Of Band Emission
- the application provides a pulse forming method, a transmitter, a receiver and a system, which can realize flexible configuration of pulse forming to support different communication scenarios.
- the present application provides a transmitter comprising: an inverse Fourier transform (IFT) module, a pulse shaping filter, a pulse shaping controller, and a parallel/serial conversion (P/S) module, wherein:
- IFT inverse Fourier transform
- P/S parallel/serial conversion
- the inverse Fourier transform module is configured to perform inverse Fourier transform on the serial-to-parallel converted baseband modulated signal, and output the transformed signal to the pulse shaping filter;
- the pulse shaping controller is configured to: receive pulse configuration signaling, generate a pulse parameter corresponding to the pulse to be configured according to the pulse configuration signaling, and output the pulse parameter to the pulse shaping filter;
- the pulse shaping filter is configured to: perform subcarrier level filtering on an output signal of the inverse Fourier transform module, perform pulse shaping processing on an output signal of the inverse Fourier transform module according to the pulse parameter; Signal output to the P/S module;
- the P/S module is configured to serially output a signal processed by the pulse shaping filter.
- the pulse shaping filter includes: adding a module and adding, in a condition that the second flag bit tail is equal to a second enable value Window module, where:
- the adding module is configured to: add a second length cyclic suffix to the OFDM symbol corresponding to the output signal of the inverse Fourier transform module; and output the OFDM symbol added with the cyclic suffix to the windowing module ;
- the windowing module is configured to: for a tail portion of the OFDM symbol output by the adding module, using a second half of the preset windowing function, at a N sampling point of the tail portion, The OFDM symbol is windowed; and the windowed OFDM symbol is output; the N is a positive integer.
- the pulse shaping is performed under the condition that the first flag position Flag head is equal to the first enable value
- the filter also includes a calculation module, wherein:
- the adding module is configured to: add a first length cyclic prefix to an OFDM symbol corresponding to an output signal of the inverse Fourier transform module; and output the OFDM symbol added with a cyclic prefix to the windowing module ;
- the windowing module is configured to: for a header portion of the OFDM symbol output by the adding module, using a first half of a preset windowing function, at the M sampling points of the header portion, The OFDM symbol is windowed; and the windowed OFDM symbol is output to the computing module; the M is a positive integer;
- the calculating module is configured to: add X sampling points of a tail portion of a previous OFDM symbol to the OFDM symbol on X sampling points of a header portion of the OFDM symbol after windowing; and The added OFDM symbols are output; the X is a positive integer.
- the method further includes: a storage module, configured to add The Y sample points of the tail portion of the OFDM symbol after window processing are saved to a storage medium; the Y is a positive integer.
- the pulse shaping filter includes: a multi-phase register network, configured to: determine a transmit-end filter coefficient according to the length K and a shape P type of the pulse to be configured, The output signal of the inverse Fourier transform module performs subcarrier level filtering, and outputs the filtered plurality of subcarriers to the parallel/serial conversion module.
- the pulse configuration signaling carries the pulse parameter; or the pulse configuration signaling carries indication information of the pulse parameter.
- the pulse parameter includes: all or part of the preset parameter set;
- the preset parameter set includes: a first flag bit Flag head , a second flag bit Flag tail , a first value N 1 , a second value N 2 , a shape P type of the pulse to be configured, and the pulse to be configured relative to The length K of a single symbol period.
- the first flag Flag head is used to indicate whether the symbol header is pulse-formed
- the second flag Flag tail is used to indicate whether the symbol tail is pulse-formed
- the first value N 1 is used to indicate a single
- the second value N 2 is used to indicate the number of sampling points for pulse shaping outside a single symbol.
- the present application provides a receiver comprising: a serial to parallel conversion (S/P) module, a pulse shaping filter, a pulse shaping controller, and a Fourier transform module, wherein:
- the S/P module is configured to: output a serial input transmission signal to the pulse shaping filter in parallel;
- the pulse shaping controller is configured to: receive pulse configuration signaling, generate a pulse parameter corresponding to the pulse to be configured according to the pulse configuration signaling, and output the pulse parameter to the pulse shaping filter;
- the pulse shaping filter is configured to perform subcarrier level filtering on an output signal of the S/P module, perform pulse shaping processing on an output signal of the S/P module according to the pulse parameter, and process the processed signal Output to the Fourier transform module;
- the Fourier transform module is configured to perform a Fourier transform on the signal processed by the pulse shaping filter.
- the pulse shaping filter includes: a windowing module and a condition that the second flag bit tail is equal to a second enable value Remove the module, where:
- the windowing module is configured to: use a second portion of the preset windowing function for the tail portion of the OFDM symbol corresponding to the output signal of the S/P module, and at the N sampling points of the tail portion, The OFDM symbol is windowed; and the windowed OFDM symbol is output to the removal module; the N is a positive integer;
- the removing module is configured to: remove, for the OFDM symbol after the windowing process, a cyclic suffix of a second length; and output the OFDM symbol after removing the cyclic suffix.
- the pulse shaping is performed under the condition that the first flag position Flag head is equal to the first enable value
- the filter also includes a calculation module, wherein:
- the calculating module is configured to: for the head portion of the OFDM symbol corresponding to the output signal of the S/P module, use X parts of the tail portion of the previous OFDM symbol at the X sampling points of the header portion Sampling points are subtracted from the OFDM symbol; and the subtracted OFDM symbols are output to the windowing module;
- the windowing module is configured to: for the header portion of the subtracted OFDM symbol, use the first half of the preset windowing function, and at the M sampling points of the header portion, the OFDM symbol Perform windowing; the M is a positive integer;
- the removing module is configured to: remove, for the OFDM symbol after the windowing process, a cyclic prefix of a first length; and output the OFDM symbol after removing the cyclic suffix.
- the method further includes: a storage module, The Y sample points of the tail portion of the OFDM symbol corresponding to the output signal of the S/P module are saved in a storage medium; the Y is a positive integer.
- the pulse shaping filter includes: a multi-phase register network, configured to: receive filter coefficients according to the length K and the shape P type of the pulse to be configured, The output signal of the S/P module performs subcarrier level filtering, and outputs the filtered plurality of subcarriers to the Fourier transform module.
- the pulse parameter includes: all or part of a preset parameter set; the preset parameter set includes: a first flag position Flag head a second flag, Flag tail , a first value N 1 , a second value N 2 , a shape P type of the pulse to be configured, and a length K of the pulse to be configured with respect to a single symbol period.
- the first flag Flag head is used to indicate whether the symbol header is pulse-formed
- the second flag Flag tail is used to indicate whether the symbol tail is pulse-formed
- the first value N 1 is used to indicate a single
- the second value N 2 is used to indicate the number of sampling points for pulse shaping outside a single symbol.
- the present application provides a pulse forming method applied to a transmitting end, the method comprising:
- subcarrier level filtering of the transmitting end is performed on the transmission signal, and the transmission signal is subjected to pulse shaping processing according to the pulse parameter.
- the transmitting signal is performed according to the pulse parameter, under a condition that the first flag position Flag head is equal to a first enable value
- the pulse forming process includes:
- the multi-path signals corresponding to the added OFDM symbols are subjected to parallel-serial conversion and output.
- the second flag bit Flag tail is equal to the second enable value
- the Y sample points of the tail portion of the OFDM symbol after windowing are saved to a storage medium; the Y is a positive integer.
- the performing a pulse forming process on the transmission signal according to the pulse parameter includes:
- Subcarrier-level filtering is performed on the transmission signal according to the length K and the transmission end filter coefficient determined by the shape P type of the pulse to be configured.
- the generating, according to the pulse configuration signaling, a pulse parameter corresponding to the pulse to be configured including:
- the pulse parameter includes: all or part of a preset parameter set; the preset parameter set includes: a first flag position Flag head a second flag, Flag tail , a first value N 1 , a second value N 2 , a shape P type of the pulse to be configured, and a length K of the pulse to be configured with respect to a single symbol period.
- the first flag Flag head is used to indicate whether the symbol header is pulse-formed
- the second flag Flag tail is used to indicate whether the symbol tail is pulse-formed
- the first value N 1 is used to indicate a single
- the second value N 2 is used to indicate the number of sampling points for pulse shaping outside a single symbol.
- the present application provides a pulse forming method applied to a receiving end, the method comprising:
- subcarrier level filtering of the transmitting end is performed on the transmission signal, and the transmission signal is subjected to pulse shaping processing according to the pulse parameter.
- the transmitting signal is performed according to the pulse parameter, under the condition that the first flag position Flag head is equal to the first enable value
- the pulse forming process includes:
- the cyclic prefix of the first length is removed for the OFDM symbol after windowing.
- the second flag bit Flag tail is equal to the second enable value
- N is a positive integer
- the cyclic suffix of the second length is removed for the OFDM symbol after windowing.
- the performing a pulse forming process on the transmission signal according to the pulse parameter includes:
- Subcarrier-level filtering is performed on the transmission signal according to the length K and the receiving end filter coefficient determined by the shape P type of the pulse to be configured.
- the generating, according to the pulse configuration signaling, a pulse parameter corresponding to the pulse to be configured including:
- the pulse parameter includes: all or part of a preset parameter set; the preset parameter set includes: a first flag position Flag head a second flag, Flag tail , a first value N 1 , a second value N 2 , a shape P type of the pulse to be configured, and a length K of the pulse to be configured with respect to a single symbol period.
- the first flag Flag head is used to indicate whether the symbol header is pulse-formed
- the second flag Flag tail is used to indicate whether the symbol tail is pulse-formed
- the first value N 1 is used to indicate a single
- the second value N 2 is used to indicate the number of sampling points for pulse shaping outside a single symbol.
- the present application provides a communication system, the system comprising: a transmitter and a receiver, wherein: the transmitter is a transmitter described in any of the possible implementations of the first aspect, the receiver is A receiver as described in any of the possible implementations of the second aspect.
- the upper layer can send pulse configuration signaling carrying different pulse parameters to the pulse shaping controller according to different communication scenarios, and the pulse shaping filtering controlled is configured for different communication scenarios.
- Different pulse shapes are flexibly adapted to different communication scenarios; by implementing the receiver provided by the present application, on the receiver side, the upper layer can send pulse configuration signaling carrying different pulse parameters to the pulse forming controller according to different communication scenarios.
- the pulse shaping filter in the receiver to configure different pulse shapes for different communication scenarios, and flexibly adapt to different communication scenarios.
- FIG. 1A is a schematic diagram of an application scenario involved in the present application.
- FIG. 1B is a schematic diagram of another application scenario involved in the present application.
- FIG. 1C is a schematic diagram of still another application scenario involved in the present application.
- FIG. 2 is a schematic structural diagram of a transmitter provided by the present application.
- FIG. 3 is a schematic diagram of transmission of two adjacent symbols provided by the present application.
- FIG. 4 is a schematic diagram of an implementation block diagram of a transmitter provided by the present application.
- FIG. 5 is a schematic diagram of another implementation block diagram of a transmitter provided by the present application.
- FIG. 6 is a schematic structural diagram of a receiver provided by the present application.
- FIG. 7 is a schematic diagram of an implementation block diagram of a receiver provided by the present application.
- FIG. 8 is a schematic diagram of another implementation block diagram of a receiver provided by the present application.
- FIG. 9 is a schematic flow chart of a pulse forming method of a transmitting end provided by the present application.
- FIG. 10 is a schematic flow chart of a pulse forming method at the receiving end provided by the present application.
- pulse shaping processes corresponding to different pulse shapes (eg, rectangular pulses, Gaussian pulses, raised cosine pulses, etc.) need to be employed to accommodate different communication scenarios. details as follows:
- the communication system adjusts the Modulation and Coding Scheme (MCS) in real time according to the channel quality information.
- MCS Modulation and Coding Scheme
- different physical channels coexist, for example, a physical random access channel (PRACH) and a physical uplink shared channel (PUSCH) coexist, wherein the PUSCH is compared to the PUSCH.
- PRACH physical random access channel
- PUSCH physical uplink shared channel
- PRACH usually reserved for guard band G sc
- PRACH longer need to support multi-path delay spread and high resistance asynchronous capabilities
- the PRACH with other physical channels e.g., PUSCH
- PRACH and other different physical channels use different pulse shapes for pulse shaping processing, which can help reduce mutual interference between channels and reduce the guard band G sc overhead to support the coexistence of physical channels with different requirements.
- different pulse waveforms can be configured for different service types according to the service type corresponding to the transmission signal, so as to perform flexible pulse shaping processing to adapt to the communication performance requirements of different services.
- pulse shaping refers to subcarrier level filtering (ie, filtering for subcarriers) that satisfies the transmission signal s(t) described in the following formula in an OFDM system, or pulse forming of an OFDM signal. :
- s(t) is the transmission signal of the OFDM system
- a m,n is the data on the mth subcarrier and the nth symbol
- T is the OFDM symbol period
- F is the subcarrier spacing of OFDM
- g tx is the transmitting end Waveform or (prototype) sends a pulse.
- the receiver waveform or (prototype) received pulse as opposed to g tx can be expressed as ⁇ rx .
- the transmitting end waveform g tx and the receiving end waveform ⁇ rx are fixed to a rectangular shape by default.
- the present application provides a pulse forming method, a transmitter, a receiver and a system, which can realize flexible configuration of pulse forming to support different Communication scenario.
- the pulse forming method, transmitter, receiver and system provided by the present application will be described in detail below with reference to the accompanying drawings.
- the transmitter 10 can include a pulse shaping controller 101, a pulse shaping filter 102, an inverse Fourier transform (IFT) 103, and a parallel/serial conversion (P/S) module 104, wherein:
- the inverse Fourier transform module 103 can be configured to perform inverse Fourier transform on the serial-to-parallel converted baseband modulated signal, and output the transformed signal to the pulse shaping filter 102;
- the pulse forming controller 101 is configured to: receive pulse configuration signaling, generate a pulse parameter corresponding to the pulse to be configured according to the pulse configuration signaling, and output the pulse parameter to the pulse shaping filter 102; the pulse shaping filter 102 is available And performing subcarrier level filtering on the output signal of the inverse Fourier transform module 103, performing pulse shaping processing on the output signal of the inverse Fourier transform module 103 according to the pulse parameter; and outputting the processed signal to P/S module 104;
- the P/S module 104 is configured to serially output a signal processed by the pulse shaping filter.
- FIG. 1 only shows a part of the architecture of the transmitter 10.
- the transmitter 10 may further include other modules for signal modulation and signal transmission, which are not described herein.
- the pulse configuration signaling may carry the pulse parameter, and the pulse parameter may be directly obtained from the signaling.
- the pulse configuration signaling may also carry only the indication information of the pulse parameter, and the pulse parameter may be obtained according to the indication information.
- the signaling carries an index of the pulse parameter in a preset database, and the preset database has previously notified the pulse shaping controller 101. Then, the pulse shaping controller 101 can find the pulse data from the preset database according to the index.
- the examples are only one implementation provided by the present application, which may be different in practical applications and should not be construed as limiting.
- the pulse parameter that the pulse shaping controller 101 outputs to the pulse shaping filter 102 may be all or part of a preset parameter set.
- the preset parameter set is as shown in Table 1:
- ⁇ denotes the roll-off coefficient of the Raised Cosine (RC) filter
- N CP is the length of the OFDM cyclic prefix
- N sym is the number of sampling points corresponding to a single symbol period.
- the preset parameter set may also include some system predefined OFDM parameters, such as N CP and N sym , or other parameters, which are not limited herein.
- a set of pulse parameters corresponds to a particular pulse shape.
- the first flag Flag head can be used to indicate whether the symbol header is pulse-formed
- the second flag Flag tail can be used to indicate whether the symbol tail is pulse-formed
- P type can be used to indicate that The shape of the pulse is configured
- K can be used to indicate the length of the pulse to be configured relative to a single symbol period.
- the indication value of the first value N 1 and the second value N 2 may be as shown in FIG. 3 , wherein the first value N 1 may be used to indicate the number of sampling points in the single symbol that are pulse-formed and whose amplitude weight is not equal to 1;
- the second value N 2 can be used to indicate the number of sample points that are pulse shaped outside of a single CP-OFDM symbol; the number of sample points of the overlap between two adjacent symbols (symbol i and symbol i+1) is 2N 2 .
- the first flag bit Flag head indicates Flag head symbol from the head to do pulse shaping, or that the symbol is not the head pulse shaping .
- the first flag bit Flag head is a 1-bit flag bit, and the first enable value is 1. Then, when the Flag head is equal to 1, it indicates that the symbol head is pulse-formed; when the Flag head is equal to 0, it indicates that the symbol header is not pulse-formed.
- the second flag bit tail indicates that the symbol tail is pulse-formed, otherwise the symbol tail is not pulsed. forming.
- first enable value and the second enable value may be defined according to actual requirements, and are not limited herein.
- the transmitter 10 corresponding to FIG. 4 is preferably applied in a scene in which the length of the pulse shape is small (such as the K ⁇ 2)
- the transmitter 10 corresponding to FIG. 5 is preferably applied when the length of the pulse shape is large (eg, In the scene of K>2).
- the transmitter 10 can be as shown in FIG. Wherein: the inverse Fourier transform module 103, the parallel-to-serial conversion (P/S) module 104 and the pulse shaping controller 101 are identical to the corresponding modules in the embodiment of FIG. 2, and are not described again; the pulse shaping filter 102 can be as shown in FIG. 4.
- the method further includes an adding module 1021, a windowing module 1023, a computing module 1025, and a storage module 1027.
- the adding module 1021, the windowing module 1023, and the calculating module 1025 may be used together for the inverse Fourier transform module 103 under the condition that the first flag Flag head is equal to the first enable value (such as "1").
- the head of the OFDM symbol of the output signal is subjected to pulse shaping processing. among them:
- the adding module 1021 is configured to: add, for the OFDM symbol, a cyclic prefix of a first length; and output the OFDM symbol to which the cyclic prefix is added to the windowing module 1023.
- the first length may be equal to (N CP + N 2 ).
- the first length may also be equal to N CP plus an integer multiple of N 2 , for example, (N CP +2N 2 ), and the first length may also be other values, which is not limited herein.
- the windowing module 1023 can be configured to: for a header portion of the OFDM symbol, use a first window portion of a preset windowing function (such as a windowing function indicated by P type ), at M sampling points of the header portion, Windowing the OFDM symbol; and outputting the windowed OFDM symbol to the computing module 1025; the M is a positive integer.
- a preset windowing function such as a windowing function indicated by P type
- the M may be equal to (N 1 + N 2 ). It should be noted that, according to actual application requirements, the M may also be other values, such as (N 1 + 2N 2 ), which is not limited herein.
- the calculating module 1025 is operative to: add X sampling points of the tail portion of the previous OFDM symbol to the OFDM symbol on the X sampling points of the header portion of the OFDM symbol after the windowing process; The added OFDM symbol output.
- the X is a positive integer. It should be noted that the addition refers to adding X sampling points of the tail portion of one OFDM symbol in the time domain. For example, as shown in FIG. 4, the X is equal to 2N 2 , and its physical meaning is as shown in FIG. 3, which means that a sampling point overlapping the tail portion of the previous OFDM symbol and the OFDM symbol is added to the OFDM. The head part of the symbol.
- the adding module 1021 and the windowing module 1023 may also be used together for the output signal of the inverse Fourier transform module 103 under the condition that the second flag bit tail is equal to the second enable value (such as "1").
- the tail of the OFDM symbol is subjected to pulse shaping processing. among them:
- the adding module 1021 is configured to: add, for the OFDM symbol, a cyclic suffix of a second length; and output the OFDM symbol to which the cyclic suffix is added to the windowing module 1023.
- the second length may be equal to N 2.
- the second length may also be equal to N CP plus an integer multiple of N 2 , for example, (N CP +2N 2 ), and the second length may also be other values, which is not limited herein.
- the windowing module 1023 can be configured to: for the tail portion of the OFDM symbol output by the adding module 1021, using the second half of the preset windowing function (such as the windowing function indicated by P type ), N in the tail portion At the sampling point, the OFDM symbol is windowed; and the windowed OFDM symbol is output; the N is a positive integer.
- the second half of the preset windowing function such as the windowing function indicated by P type
- the N may be equal to (N 1 + N 2 ). It should be noted that, according to actual application requirements, the N may also be other values, such as (N 1 + 2N 2 ), which is not limited herein.
- the storage module 1029 in the transmitter 10 shown in FIG. 4 can be configured to save the Y sample points of the tail portion of the windowed processed OFDM symbol into a storage medium.
- Y may be equal to X, that is, X sampling points of the tail portion of the previous OFDM symbol may be stored in a storage medium.
- Y can also be greater than X, which is not limited here.
- Time Division Duplexing (TDD) technology requires more frequent uplink and downlink switching, usually with a switching period of less than 1 millisecond.
- TDD Time Division Duplexing
- the signal may be leaked in the time domain due to the system's out-of-synchronization, causing mutual interference between the uplink and the downlink.
- pulse shaping processing at the tail of the last symbol of the uplink frame described in the present application, or performing pulse shaping processing on the head of the first symbol of the downlink frame, smooth switching of uplink and downlink data frames can be realized, and the improvement can be improved. Up and down interference.
- the transmitter 10 can be as shown in FIG.
- the inverse Fourier transform module 103, the parallel-to-serial conversion (P/S) module 104 and the pulse shaping controller 101 are identical to the corresponding modules in the embodiment of FIG. 2, and are not described again;
- the pulse shaping filter 102 can be as shown in FIG. 4.
- the method includes: a multi-phase register network, configured to perform a sub-carrier level on an output signal of the inverse Fourier transform module 103 according to the length K and a transmit-end filter coefficient determined by the shape P type of the pulse to be configured. Filtering, and outputting the filtered plurality of subcarriers to the parallel to serial conversion module 104.
- the depth of the multi-phase register network is consistent with the length K.
- a set of said lengths K and P type can determine the transmit end filter coefficient g tx .
- the input received by the multiphase register network shown in FIG. 4 is the n signal of the output of the inverse Fourier transform module 103.
- the transmitter 10 may include: a pulse shaping filter in the embodiment of FIG. 4 and a pulse shaping filter in the embodiment of FIG. 5, both of which are combined with pulse shaping control.
- the unit 101 and the inverse Fourier transform module 103 are connected.
- the pulse shaping filter in the corresponding embodiment of FIG. 4 and FIG. 5 respectively may be two hardware modules, and the two hardware modules are independently integrated in the transmitter 10, and each of them is The pulse forming controllers are connected; in practical applications, the two hardware modules can also be integrated in the pulse forming controller as part of the pulse forming controller, and the application is on the hardware architecture of the two hardware modules.
- the layout is not limited.
- the pulse shaping filter in the corresponding embodiment of FIG. 4 and FIG. 5 respectively may be two software modules, and the two software modules may be operated in the pulse shaping controller. It can be run on other processing chips that can communicate with the pulse shaping controller.
- the application environment of the two software modules is not limited in this application.
- the pulse forming controller 101 is further configured to: determine whether the length K is greater than The preset value (such as 2), if it is greater, outputs the pulse parameter to the pulse shaping filter in the embodiment of FIG. 4, which is used to trigger the pulse shaping filter in the embodiment of FIG. 4 to perform pulse shaping processing on the transmission signal. If less than or equal to, the pulse parameter is output to the pulse shaping filter in the embodiment of FIG. 4 to trigger the pulse shaping filter in the embodiment of FIG. 4 to perform pulse shaping processing on the transmission signal.
- the preset value such as 2
- the pulse parameter used in the embodiment of FIG. 4 may be a subset of the preset parameter set shown in FIG. 1, ie, ⁇ N 1 , N 2 , Flag head , Flag tail ⁇ ; used in the embodiment of FIG. 4
- the pulse parameter can be another subset of the preset parameter set shown in Figure 1, namely ⁇ K, P type ⁇ .
- the pulse configuration signaling received by the pulse shaping controller 101 may be an upper layer, such as signaling sent by a Radio Resource Control (RRC).
- RRC Radio Resource Control
- the pulse configuration signaling may also be sent by the application layer to the pulse shaping controller 101 in response to user operations.
- the application is not limited.
- the upper layer of the transmitter 10 can transmit pulse configuration signaling carrying different pulse parameters to the pulse shaping controller 101 according to different communication scenarios (as shown in FIGS. 1A-1C) to control the pulse.
- the shaping filter 102 configures different pulse shapes for different communication scenarios, and is flexible to adapt to different communication scenarios.
- FIG. 6 is a schematic structural diagram of a receiver provided by the present application.
- the receiver 20 may include a serial to parallel conversion (S/P) module 204, a pulse shaping filter 202, a pulse shaping controller 201, and a Fourier transform module 203, wherein:
- the S/P module 204 can be configured to: output the serial input transmission signal to the pulse shaping filter 202 in parallel;
- the pulse shaping controller 201 is configured to: receive pulse configuration signaling, generate a pulse parameter corresponding to the pulse to be configured according to the pulse configuration signaling, and output the pulse parameter to the pulse shaping filter 202;
- the pulse shaping filter 202 can be configured to perform subcarrier level filtering on the output signal of the S/P module 204, perform pulse shaping processing on the output signal of the S/P module 204 according to the pulse parameter, and output the processed signal to Fourier transform module 203;
- the Fourier transform module 203 can be configured to perform a Fourier transform on the signal processed by the pulse shaping filter.
- FIG. 6 only shows a part of the architecture of the receiver 20.
- the receiver 20 may further include other modules for signal demodulation and signal reception, which are not described herein.
- the pulse parameter output by the pulse shaping controller 201 to the pulse shaping filter 202 may be all or part of a preset parameter set.
- the preset parameter set may refer to Table 1 in the embodiment of FIG. 2 and related description, and details are not described herein again.
- the receiver 20 corresponding to FIG. 7 is preferably applied in a scene in which the length of the pulse shape is small (such as the K ⁇ 2)
- the receiver 20 corresponding to FIG. 8 is preferably applied when the length of the pulse shape is large (as in the In the scene of K>2).
- the receiver 20 can be as shown in FIG. Wherein: the serial-to-parallel conversion (S/P) module 204, the pulse forming controller 201, and the Fourier transform module 203 are identical to the corresponding modules in the embodiment of FIG. 6, and are not described again; the pulse shaping filter 202 can be as shown in FIG.
- the method further includes: a calculation module 2021, a windowing module 2023, and removal Module 2025 and storage module 2027.
- the calculation module 2021, the windowing module 2023, and the removal module 2025 may be used together for output signals to the S/P module 204 under the condition that the first flag Flag head is equal to the first enable value (eg, "1").
- the head of the corresponding OFDM symbol is subjected to pulse shaping processing. among them:
- the calculating module 2021 is configured to: with respect to the header portion of the OFDM symbol, use X sampling points of the tail portion of the previous OFDM symbol to subtract the OFDM symbol from the X sampling points of the header portion; The subtracted OFDM symbols are output to the windowing module 2023.
- X is a positive integer.
- the subtraction refers to subtracting X sample points of the tail portion of the previous OFDM symbol in the time domain.
- the Y may be equal to 2N 2 , and its physical meaning is as described with reference to FIG. 3, which means subtracting the tail portion and the slave of the previous OFDM symbol from the header portion of the OFDM symbol. Sample points where OFDM symbols overlap.
- the windowing module 2023 is configured to: for the header portion of the subtracted OFDM symbol, perform the OFDM symbol on the M sampling points of the header portion by using a first half of the preset windowing function Windowing processing; and outputting the windowed OFDM symbol to the removing module 2025; the M is a positive integer.
- the M may be equal to (N 1 + N 2 ). It should be noted that, according to actual application requirements, the M may also be other values, such as (N 1 + 2N 2 ), which is not limited herein.
- the removing module 2025 is configured to: remove, for the OFDM symbol after the windowing process, a cyclic prefix of a first length; and output the OFDM symbol after removing the cyclic prefix.
- the first length may be equal to (N CP + N 2 ).
- the first length may also be equal to N CP plus an integer multiple of N 2 , for example, (N CP +2N 2 ), and the first length may also be other values, which is not limited herein.
- the windowing module 2023 and the removing module 2025 may be used together for the OFDM symbol corresponding to the output signal of the S/P module 204 under the condition that the second flag bit tail is equal to the second enabling value (such as "1").
- the tail is pulsed. among them:
- the windowing module 2023 is configured to: for the tail portion of the OFDM symbol, use a second half of the preset windowing function to perform windowing on the OFDM symbol at the N sampling points of the tail portion; Outputting the windowed OFDM symbol to the removal module; the N is a positive integer.
- the N may be equal to (N 1 + N 2 ). It should be noted that, according to actual application requirements, the N may also be other values, such as (N 1 + 2N 2 ), which is not limited herein.
- the removing module 2025 is configured to: remove the cyclic suffix of the second length for the windowed processed OFDM symbol; and output the OFDM symbol with the cyclic suffix removed.
- the second length may be equal to N 2.
- the second length may also be equal to N CP plus an integer multiple of N 2 , for example, (N CP +2N 2 ), and the second length may also be other values, which is not limited herein.
- the storage module 2027 in the receiver 20 shown in FIG. 7 can be configured to: save Y sample points of the tail portion of the OFDM symbol corresponding to the output signal of the S/P module 204 into a storage medium; the Y is a positive integer .
- Y may be equal to X, that is, X sampling points of the tail portion of the previous OFDM symbol may be stored in a storage medium.
- Y can also be greater than X, which is not limited here.
- the receiver 20 can be as shown in FIG. Wherein: the serial-to-parallel conversion (S/P) module 204, the pulse shaping controller 201, and the Fourier transform module 203 are identical to the corresponding modules in the embodiment of FIG. 5, and are not described again; the pulse shaping filter 202 can be as shown in FIG. shows comprising: a multi-phase network registers, configured to: according to the length of the receiving side filter coefficient K and the shape of the pulse P type arranged to be determined, the output signal S / P module 204. subcarrier stage filter, and The filtered plurality of subcarriers are output to the Fourier transform module 203.
- S/P serial-to-parallel conversion
- the pulse shaping filter 202 can be as shown in FIG. shows comprising: a multi-phase network registers, configured to: according to the length of the receiving side filter coefficient K and the shape of the pulse P type arranged to be determined, the output signal S / P module 204. subcarrier stage filter, and The filtered plurality of subcar
- the depth of the multi-phase register network is consistent with the length K.
- a set of said lengths K and P type can determine the transmit end filter coefficient ⁇ rx .
- the input received by the multi-phase register network shown in FIG. 8 is the n-channel signal output by the S/P module 204.
- the receiver 20 may include: a pulse shaping filter in the embodiment of FIG. 7 and a pulse shaping filter in the embodiment of FIG. 8, both of which are combined with a pulse shaping controller 201.
- the inverse Fourier transform module 203 is connected.
- the pulse shaping filter in the corresponding embodiment of FIG. 7 and FIG. 8 respectively may be two hardware modules, and the two hardware modules are independently integrated in the transmitter 10, and each of them is The pulse forming controllers are connected; in practical applications, the two hardware modules can also be integrated in the pulse forming controller as part of the pulse forming controller, and the application is on the hardware architecture of the two hardware modules.
- the layout is not limited.
- the pulse shaping filter in the corresponding embodiment of FIG. 7 and FIG. 8 respectively may be two software modules, and the two software modules may be operated in the pulse shaping controller. It can be run on other processing chips that can communicate with the pulse shaping controller.
- the application environment of the two software modules is not limited in this application.
- the pulse forming controller 101 is further configured to: determine whether the length K is greater than a preset value (eg, 2), and if greater, output the pulse parameter to the embodiment of FIG. a pulse shaping filter for triggering the pulse shaping filter in the embodiment of FIG. 8 to perform pulse shaping processing on the transmission signal; if less than or equal to, outputting the pulse parameter to the pulse shaping filter in the embodiment of FIG.
- the pulse shaping filter transmission signal in the embodiment of FIG. 7 is triggered to perform pulse shaping processing.
- the pulse parameter used in the embodiment of FIG. 7 may be a subset of the preset parameter set shown in FIG. 1, namely ⁇ N 1 , N 2 , Flag head , Flag tail ⁇ ; used in the embodiment of FIG. 8
- the pulse parameter can be another subset of the preset parameter set shown in Table 1, namely ⁇ K, P type ⁇ .
- the upper layer of the receiver 20 can transmit pulse configuration signaling carrying different pulse parameters to the pulse shaping controller 201 according to different communication scenarios (as shown in FIGS. 1A-1C) to control the pulse.
- the shaping filter 202 configures different pulse shapes for different communication scenarios, and is flexible to adapt to different communication scenarios.
- FIG. 9 it is a schematic flowchart of a pulse forming method provided by the present application.
- the method is applied at the transmitting end, such as the transmitter 10 shown in Figures 2, 4-5.
- the method includes:
- S101 Receive pulse configuration signaling, and generate a pulse parameter corresponding to the pulse to be configured according to the pulse configuration signaling.
- the pulse configuration signaling may carry the pulse parameter, and the pulse parameter may be directly obtained from the signaling.
- the pulse configuration signaling may also carry only the indication information of the pulse parameter, and the pulse parameter may be obtained according to the indication information.
- the signaling carries an index of the pulse parameter in a preset database, and the preset database has previously notified the transmitter 10. Then, the transmitter 10 can find the pulse data from the preset database according to the index.
- the pulse parameter may be all or part of a preset parameter set.
- the preset parameter set may refer to Table 1 in the embodiment of FIG. 2 and related content, and details are not described herein again.
- a set of pulse parameters corresponds to a particular pulse shape.
- the first flag Flag head can be used to indicate whether the symbol header is pulse-formed
- the second flag Flag tail can be used to indicate whether the symbol tail is pulse-formed
- the first value N 1 is available.
- the second value N 2 may be used to indicate the number of sampling points for pulse shaping outside a single symbol
- P type may be used to indicate a pulse to be configured.
- the shape, K can be used to indicate the length of the pulse to be configured relative to a single symbol period.
- this implementation is preferably applied in a scenario where the length of the pulse shape is small (such as the K ⁇ 2), and the implementation manner is as follows:
- pulse shaping process may be performed on the transmission signal corresponding to the head of the OFDM symbol, the specific steps include:
- the step of performing the pulse shaping process on the tail of the OFDM symbol corresponding to the transmission signal may be performed on the condition that the second flag, the flag tail, is equal to the second enable value (eg, “1”), and the specific steps may include:
- the OFDM symbol is used at the N sampling points of the tail portion. Windowing is performed; the N is a positive integer.
- S1037 Save the Y sample points of the tail portion of the OFDM symbol after windowing processing into a storage medium.
- FIG. 4 For details, please refer to FIG. 4 for details that are not mentioned in the first implementation manner, and details are not described herein again.
- the implementation is preferably applied in a scenario where the length of the pulse shape is large (such as the K>2), and the foregoing S103 may specifically include: according to the length K and The transmitting end filter coefficient determined by the shape P type of the pulse to be configured is subjected to subcarrier level filtering on the transmission signal.
- the transmitting end filter may include a multi-phase register network, and the depth of the multi-phase register network is consistent with the length K.
- a set of said lengths K and P type can determine the transmit end filter coefficient g tx .
- the pulse forming method provided by the present application may further include: before S103, determining whether the length K is greater than a preset value (such as 2), and if less than or equal to, triggering execution of the first implementation manner. S103; if it is greater, triggering S103 implemented by the second implementation manner described above.
- a preset value such as 2
- the transmission signal when the transmission signal is subcarrier-level filtered at the transmitting end, the transmission signal is pulse-formed according to the pulse parameter carried by the pulse configuration instruction, wherein different pulse configuration parameters correspond to different pulses.
- the shape can realize flexible configuration of pulse shape at the transmitting end to adapt to different communication scenarios.
- FIG. 10 is a schematic flow chart of a pulse forming method provided by the present application. The method is applied at the receiving end, such as receiver 20 shown in Figures 6-8. As shown in FIG. 10, the method includes:
- the pulse configuration signaling may carry the pulse parameter, and the pulse parameter may be directly obtained from the signaling.
- the pulse configuration signaling may also carry only the indication information of the pulse parameter, and the pulse parameter may be obtained according to the indication information.
- the signaling carries an index of the pulse parameter in a preset database, and the preset database has previously notified the receiver 20. Then, the receiver 20 can find the pulse data from the preset database according to the index.
- the pulse parameter may be all or part of a preset parameter set.
- the preset parameter set may refer to Table 1 in the embodiment of FIG. 2 and related content, and details are not described herein again.
- a set of pulse parameters corresponds to a particular pulse shape.
- the first flag Flag head may be used to indicate whether the symbol do pulse shaping head
- the second flag Flag tail symbols may be used to indicate whether or not to make the tail pulse shaping
- a first value of N 1 Available The number of sampling points indicating pulse shaping and amplitude weight not equal to 1 in a single symbol
- the second value N 2 may be used to indicate the number of sampling points for pulse shaping outside a single symbol
- P type may be used to indicate a pulse to be configured.
- the shape, K can be used to indicate the length of the pulse to be configured relative to a single symbol period.
- this implementation is preferably applied in a scenario where the length of the pulse shape is small (such as the K ⁇ 2), and the implementation manner is as follows:
- pulse shaping process may be performed on the transmission signal corresponding to the head of the OFDM symbol, the specific steps include:
- S2032 Perform windowing on the OFDM symbol at the M sampling points of the header portion by using the first half of the preset windowing function for the header portion of the OFDM symbol after subtraction.
- the step of performing the pulse shaping process on the tail of the OFDM symbol corresponding to the transmission signal may be performed on the condition that the second flag, the flag tail, is equal to the second enable value (eg, “1”), and the specific steps may include:
- FIG. 7 For details, please refer to FIG. 7 for details that are not mentioned in the first implementation manner, and details are not described herein again.
- the implementation is preferably applied in a scenario where the length of the pulse shape is large (such as the K>2), and the foregoing S203 may specifically include: according to the length K and The receiving end filter coefficient determined by the shape P type of the pulse to be configured is subjected to subcarrier level filtering on the transmission signal.
- the transmit end filter may include a multi-phase register network, and the depth of the multi-phase register network is consistent with the length K.
- a set of said lengths K and P type can determine the transmit end filter coefficient ⁇ rx .
- the pulse forming method provided by the present application may further include: before S203, determining whether the length K is greater than a preset value (such as 2), and if less than or equal to, triggering execution of the first implementation manner. S203; if it is greater, triggering S203 implemented by the second implementation manner described above.
- a preset value such as 2
- the transmission signal when the transmission signal is subjected to subcarrier level filtering at the receiving end, the transmission signal is pulse-formed according to the pulse parameter carried by the pulse configuration instruction, wherein different pulse configuration parameters correspond to different pulses.
- the shape can realize flexible configuration of pulse shape at the receiving end to adapt to different communication scenarios.
- the present application also provides a communication system including: a transmitter and a receiver, wherein:
- the transmitter may be the transmitter 10 described in the embodiments corresponding to FIG. 2, FIG. 4, and FIG. 5 respectively.
- the functions and implementation manners of the transmitter reference may be specifically made to the contents of FIG. 2, FIG. 4, and FIG. No longer;
- the receiver may be the receiver 20 described in the respective embodiments of FIGS. 6 to 8 with respect to the receiver
- the functions and implementation manners may be specifically referred to the contents of the embodiments of FIG. 6 to FIG. 8 , and details are not described herein again.
- the transmitter may be a communication device that performs the pulse shaping method described in the embodiment of Figure 9, which may be a communication device that performs the pulse shaping method described in the embodiment of Figure 10.
- the upper layer can send pulse configuration signaling carrying different pulse parameters to the pulse shaping controller according to different communication scenarios, and the pulse shaping filtering is controlled. Different communication scenarios are configured with different pulse shapes to flexibly adapt to different communication scenarios.
- the upper layer can send different pulse parameters to the pulse shaping controller according to different communication scenarios. Pulse configuration signaling to control the pulse shaping filter in the receiver to configure different pulse shapes for different communication scenarios, and flexibly adapt to different communication scenarios.
- the program can be stored in a computer readable storage medium, when the program is executed
- the flow of the method embodiments as described above may be included.
- the foregoing storage medium includes various media that can store program codes, such as a ROM or a random access memory RAM, a magnetic disk, or an optical disk.
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Abstract
Description
Claims (26)
- 一种发射机,其特征在于,包括:傅里叶反变换(IFT)模块、脉冲成型滤波器、脉冲成型控制器和并串转换(P/S)模块,其中:所述傅里叶反变换模块用于:对串并转换后的基带调制信号进行傅里叶反变换,并将变换后的信号输出给所述脉冲成型滤波器;所述脉冲成型控制器用于:接收脉冲配置信令,根据所述脉冲配置信令生成待配置脉冲对应的脉冲参数,并将所述脉冲参数输出给所述脉冲成型滤波器;所述脉冲成型滤波器用于:针对傅里叶反变换模块的输出信号进行子载波级滤波,根据所述脉冲参数对所述傅里叶反变换模块的输出信号进行脉冲成型处理;并将处理后的信号输出给所述P/S模块;所述P/S模块用于:并将被所述脉冲成型滤波器处理后的信号串行输出。
- 根据权利要求1所述的发射机,其特征在于,在所述第二标志位Flagtail等于第二使能值的条件下,所述脉冲成型滤波器包括:添加模块和加窗模块,其中:所述添加模块用于:针对所述傅里叶反变换模块的输出信号对应的OFDM符号,添加第二长度的循环后缀;并将添加了循环后缀的所述OFDM符号输出给所述加窗模块;所述加窗模块用于:针对所述添加模块输出的所述OFDM符号的尾部部分,利用所述预设加窗函数的后半部分,在所述尾部部分的N个采样点上,对所述OFDM符号进行加窗处理;并将加窗处理后的所述OFDM符号输出;所述N是正整数。
- 根据权利要求2所述的发射机,其特征在于,在所述第一标志位Flaghead等于第一使能值的条件下,所述脉冲成型滤波器还包括:计算模块,其中:所述添加模块用于:针对所述傅里叶反变换模块的输出信号对应的OFDM符号,添加第一长度的循环前缀;并将添加了循环前缀的所述OFDM符号输出给所述加窗模块;所述加窗模块用于:针对所述添加模块输出的所述OFDM符号的头部部分,利用预设加窗函数的前半部分,在所述头部部分的M个采样点上,对所述OFDM符号进行加窗处理;并将加窗处理后的所述OFDM符号输出给所述计算模块;所述M是正整数;所述计算模块用于:在加窗处理后的所述OFDM符号的头部部分的X个采样点上,利用上一个OFDM符号的尾部部分的X个采样点与所述OFDM符号相加;并将相加后的所述OFDM符号输出;所述X是正整数。
- 根据权利要求2或3所述的发射机,其特征在于,还包括:存储模块,用于将加窗处理后的所述OFDM符号的尾部部分的Y个采样点保存到存储介质中;所述Y是正整数。
- 根据权利要求1-4中任一项所述的发射机,其特征在于,所述脉冲成型滤波器包括:多相位寄存器网络,用于:根据所述长度K和所述待配置脉冲的形状Ptype确定的发送端滤波器系数,对所述傅里叶反变换模块的输出信号进行子载波级滤波,并将滤波后的多个子 载波输出给所述并串转换模块。
- 根据权利要求1-4中任一项所述的发射机,其特征在于,所述脉冲配置信令携带所述脉冲参数;或者,所述脉冲配置信令携带所述脉冲参数的指示信息。
- 根据权利要求1-6中任一项所述的发射机,其特征在于,所述脉冲参数包括:预设参数集合的全部或部分;所述预设参数集合包括:第一标志位Flaghead,第二标志位Flagtail,第一数值N1,第二数值N2,所述待配置脉冲的形状Ptype以及所述待配置脉冲相对于单个符号周期的长度K。其中,所述第一标志位Flaghead用于指示符号头部是否做脉冲成型,所述第二标志位Flagtail用于指示符号尾部是否做脉冲成型,所述第一数值N1用于指示单个符号内做脉冲成型且幅度权重不等于1的采样点的个数,所述第二数值N2用于指示单个符号外做脉冲成型的采样点的个数。
- 一种接收机,其特征在于,包括:串并转换(S/P)模块、脉冲成型滤波器、脉冲成型控制器和傅里叶变换模块,其中:所述S/P模块用于:将串行输入的传输信号并行输出给所述脉冲成型滤波器;所述脉冲成型控制器用于:接收脉冲配置信令,根据所述脉冲配置信令生成待配置脉冲对应的脉冲参数,并将所述脉冲参数输出给所述脉冲成型滤波器;所述脉冲成型滤波器用于:针对所述S/P模块的输出信号进行子载波级滤波,根据所述脉冲参数对所述S/P模块的输出信号进行脉冲成型处理,并将处理后的信号输出给所述傅里叶变换模块;所述傅里叶变换模块用于:对所述脉冲成型滤波器处理后的信号进行傅里叶变换。
- 根据权利要求8所述的接收机,其特征在于,在所述第二标志位Flagtail等于第二使能值的条件下,所述脉冲成型滤波器包括:加窗模块和去除模块,其中:所述加窗模块用于:针对所述S/P模块的输出信号对应的OFDM符号的尾部部分,利用预设加窗函数的后半部分,在所述尾部部分的N个采样点上,对所述OFDM符号进行加窗处理;并将加窗处理后的所述OFDM符号输出给所述去除模块;所述N是正整数;所述去除模块用于:针对加窗处理后的所述OFDM符号,去除第二长度的循环后缀;并将去除循环后缀后的所述OFDM符号输出。
- 根据权利要求9所述的接收机,其特征在于,在所述第一标志位Flaghead等于第一使能值的条件下,所述脉冲成型滤波器还包括:计算模块,其中:所述计算模块用于:针对所述S/P模块的输出信号对应的OFDM符号的头部部分,在所述头部部分的X个采样点上,利用上一个OFDM符号的尾部部分的X个采样点与所述OFDM符号相减;并将相减后的所述OFDM符号输出给所述加窗模块;所述加窗模块用于:针对相减后的所述OFDM符号的头部部分,利用预设加窗函数的前半部分,在所述头部部分的M个采样点上,对所述OFDM符号进行加窗处理;所述M是正整数;所述去除模块用于:针对加窗处理后的所述OFDM符号,去除第一长度的循环前缀;并将去除循环后缀后的所述OFDM符号输出。
- 根据权利要求9或10所述的接收机,其特征在于,还包括:存储模块,用于将所述S/P模块的输出信号对应的OFDM符号的尾部部分的Y个采样点保存到存储介质中;所述Y是正整数。
- 根据权利要求8-11中任一项所述的接收机,其特征在于,所述脉冲成型滤波器包括:多相位寄存器网络,用于:根据所述长度K和所述待配置脉冲的形状Ptype确定的接收端滤波器系数,对所述S/P模块的输出信号进行子载波级滤波,并将滤波后的多个子载波输出给所述傅里叶变换模块。
- 根据权利要求8-12中任一项所述的接收机,其特征在于,所述脉冲参数包括:预设参数集合的全部或部分;所述预设参数集合包括:第一标志位Flaghead,第二标志位Flagtail,第一数值N1,第二数值N2,所述待配置脉冲的形状Ptype以及所述待配置脉冲相对于单个符号周期的长度K。其中,所述第一标志位Flaghead用于指示符号头部是否做脉冲成型,所述第二标志位Flagtail用于指示符号尾部是否做脉冲成型,所述第一数值N1用于指示单个符号内做脉冲成型且幅度权重不等于1的采样点的个数,所述第二数值N2用于指示单个符号外做脉冲成型的采样点的个数。
- 一种脉冲成型方法,应用于发射端,其特征在于,包括:接收脉冲配置信令,并根据所述脉冲配置信令生成待配置脉冲对应的脉冲参数;响应所述信令,针对传输信号进行发射端的子载波级滤波,并根据所述脉冲参数对所述传输信号进行脉冲成型处理。
- 如权利要求14所述的方法,其特征在于,在所述第一标志位Flaghead等于第一使能值的条件下,所述根据所述脉冲参数对所述传输信号进行脉冲成型处理,具体包括:针对所述传输信号对应的OFDM符号,添加第一长度的循环前缀;针对添加所述第一长度的循环前缀后的所述OFDM符号的头部部分,利用预设加窗函数的前半部分,在所述头部部分的M个采样点上,对所述OFDM符号进行加窗处理;所述M是正整数;在加窗处理后的所述OFDM符号的头部部分的X个采样点上,利用上一个OFDM符号的尾部部分的X个采样点与所述OFDM符号相加;所述X是正整数;将相加后的所述OFDM符号对应的多路信号经过并串转换后输出。
- 如权利要求14或15所述的方法,其特征在于,在所述第二标志位Flagtail等于第二使能值的条件下,所述根据所述脉冲参数对所述传输信号进行脉冲成型处理,具体包括:针对所述传输信号对应的OFDM符号,添加第二长度的循环后缀;针对添加所述第二长度的循环后缀后的所述OFDM符号的尾部部分,利用预设加窗函数的后半部分,在所述尾部部分的N个采样点上,对所述OFDM符号进行加窗处理;所述N是正整数;将加窗处理后的所述OFDM符号的尾部部分的Y个采样点保存到存储介质中;所述Y是正整数。
- 如权利要求14所述的方法,其特征在于,所述根据所述脉冲参数对所述传输信号进行脉冲成型处理,具体包括:根据所述长度K和所述待配置脉冲的形状Ptype确定的发送端滤波器系数,对所述传输信号进行子载波级滤波。
- 如权利要求14-17中任一项所述的方法,其特征在于,所述根据所述脉冲配置信令生成待配置脉冲对应的脉冲参数,包括:获取所述脉冲配置信令中携带的所述脉冲参数;或者,根据所述脉冲配置信令携带的所述脉冲参数的指示信息得到所述脉冲参数。
- 如权利要求14-18中任一项所述的方法,其特征在于,所述脉冲参数包括:预设参数集合的全部或部分;所述预设参数集合包括:第一标志位Flaghead,第二标志位Flagtail,第一数值N1,第二数值N2,所述待配置脉冲的形状Ptype以及所述待配置脉冲相对于单个符号周期的长度K。其中,所述第一标志位Flaghead用于指示符号头部是否做脉冲成型,所述第二标志位Flagtail用于指示符号尾部是否做脉冲成型,所述第一数值N1用于指示单个符号内做脉冲成型且幅度权重不等于1的采样点的个数,所述第二数值N2用于指示单个符号外做脉冲成型的采样点的个数。
- 一种脉冲成型方法,应用于接收端,其特征在于,包括:接收脉冲配置信令,并根据所述脉冲配置信令生成待配置脉冲对应的脉冲参数;响应所述信令,针对传输信号进行发射端的子载波级滤波,并根据所述脉冲参数对所述传输信号进行脉冲成型处理。
- 如权利要求20所述的方法,其特征在于,在所述第一标志位Flaghead等于第一使能值的条件下,所述根据所述脉冲参数对所述传输信号进行脉冲成型处理,具体包括:在所述传输信号对应的OFDM符号的头部部分的X个采样点上,利用上一个OFDM符号的尾部部分的X个采样点与所述OFDM符号相减;所述X是正整数;针对相减后的所述OFDM符号的头部部分,利用预设加窗函数的前半部分,在所述头部部分的M个采样点上,对所述OFDM符号进行加窗处理;所述M是正整数;所述M是正整数;针对加窗处理后的所述OFDM符号,去除所述第一长度的循环前缀。
- 如权利要求20或21所述的方法,其特征在于,在所述第二标志位Flagtail等于第二使能值的条件下,所述根据所述脉冲参数对所述传输信号进行脉冲成型处理,具体包括:针对所述传输信号对应的OFDM符号的尾部部分的N个采样点,利用预设加窗函数的后半部分,在所述N个采样点上,对所述OFDM符号进行加窗处理;所述N是正整数;针对加窗处理后的所述OFDM符号,去除第二长度的循环后缀。
- 如权利要求20所述的方法,其特征在于,所述根据所述脉冲参数对所述传输信号进行脉冲成型处理,具体包括:根据所述长度K和所述待配置脉冲的形状Ptype确定的接收端滤波器系数,对所述传输信号进行子载波级滤波。
- 如权利要求20-23中任一项所述的方法,其特征在于,所述根据所述脉冲配置信令生成待配置脉冲对应的脉冲参数,包括:获取所述脉冲配置信令中携带的所述脉冲参数;或者,根据所述脉冲配置信令携带的所述脉冲参数的指示信息得到所述脉冲参数。
- 如权利要求20-24中任一项所述的方法,其特征在于,所述脉冲参数包括:预设参数集合的全部或部分;所述预设参数集合包括:第一标志位Flaghead,第二标志位Flagtail,第一数值N1,第二数值N2,所述待配置脉冲的形状Ptype以及所述待配置脉冲相对于单个符号周期的长度K。其中,所述第一标志位Flaghead用于指示符号头部是否做脉冲成型,所述第二标志位Flagtail用于指示符号尾部是否做脉冲成型,所述第一数值N1用于指示单个符号内做脉冲成型且幅度权重不等于1的采样点的个数,所述第二数值N2用于指示单个符号外做脉冲成型的采样点的个数。
- 一种通信系统,其特征在于,包括:发射机和接收机,其中:所述发射机是权利要求1-7中任一项所述的发射机,所述接收机是权利要求8-13中任一项所述的接收机。
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US11115248B2 (en) * | 2019-12-02 | 2021-09-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Pulse-shaping for high frequency radio networks |
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