WO2018054264A1 - Procédé, dispositif, et système de traitement de signal - Google Patents

Procédé, dispositif, et système de traitement de signal Download PDF

Info

Publication number
WO2018054264A1
WO2018054264A1 PCT/CN2017/101850 CN2017101850W WO2018054264A1 WO 2018054264 A1 WO2018054264 A1 WO 2018054264A1 CN 2017101850 W CN2017101850 W CN 2017101850W WO 2018054264 A1 WO2018054264 A1 WO 2018054264A1
Authority
WO
WIPO (PCT)
Prior art keywords
synchronization signal
channel
symbol
access network
network device
Prior art date
Application number
PCT/CN2017/101850
Other languages
English (en)
Chinese (zh)
Inventor
温容慧
张武荣
于光炜
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2018054264A1 publication Critical patent/WO2018054264A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay

Definitions

  • the present application relates to the field of communications and, more particularly, to methods, devices and systems for signal processing.
  • a terminal device In a wireless communication system, a terminal device needs to be synchronized with a serving cell in a time domain and a frequency domain to be able to communicate in a serving cell. Therefore, each time the terminal device is powered on or started from the sleep, it is necessary to detect the synchronization signal to obtain the time and frequency information of the serving cell.
  • the sync signal is typically generated based on baseband and mapped to the center subcarrier position of the entire bandwidth of the system.
  • the transmitting end ie, the access network device
  • the receiving end ie, the terminal device
  • the transmitting end needs to map the synchronization signal to the non-central frequency channel for transmission due to the influence of the DC component or the allocation channel limitation.
  • the multi-symbol synchronization sequence (ie, the synchronization signal) can be channel mapped by the transmitting end, that is, the synchronization signal is mapped from the center frequency channel to the non-central frequency channel.
  • the receiving end maps the synchronization signal back to the central frequency point channel for synchronization signal offset estimation.
  • the synchronization signal transmitted on the non-central frequency channel is shifted after being mapped by the transmitting end and the receiving end, thereby causing the receiving end to perform the synchronization signal offset estimation. There is an error and the synchronization performance is degraded.
  • the embodiment of the present invention provides a signal processing method, device, and system, which can improve the accuracy of the synchronization signal offset estimation by the receiving end when the synchronization signal is transmitted on the non-central frequency channel.
  • a method for signal processing comprising: the access network device performing a first process on the second synchronization signal, and generating a first synchronization signal for performing synchronization signal offset estimation, where the The second synchronization signal includes at least one symbol, and the first processing includes the access network device performing phase correction on each of the second synchronization signals.
  • the access network device sends the first synchronization signal to the terminal device on the first channel, where the first channel is a non-central frequency channel in the system bandwidth. Therefore, by the method of signal processing, the terminal device can perform synchronization signal offset estimation according to the modified synchronization signal, thereby reducing synchronization signal offset caused by mapping of the synchronization signal between the center frequency channel and the non-central frequency channel. The accuracy of the synchronization signal offset estimation is improved.
  • the first process specifically includes: the access network device is in the second synchronization signal Each symbol is phase corrected to generate a third sync signal.
  • the access network device maps the third synchronization signal from the second channel to the first channel to generate a fourth synchronization signal, where the second channel is a center frequency point channel of the system bandwidth.
  • the access network device performs inverse Fourier transform on the fourth synchronization signal and inserts a cyclic prefix to generate the first synchronization signal.
  • the access network device corrects the synchronization signal before subcarrier mapping, which can avoid interference of other sequences into the synchronization signal, and further reduces the mapping between the central frequency channel and the non-central frequency channel.
  • the synchronization signal is offset, thereby improving the accuracy of the synchronization signal offset estimation.
  • the first process specifically includes: the access network device mapping the fifth synchronization signal from the second channel to the first channel to generate the second synchronization signal, where the second channel is the The center frequency channel in the system bandwidth.
  • the access network device performs phase correction on each symbol in the second synchronization signal to generate a third synchronization signal.
  • the access network device performs inverse Fourier transform on the third synchronization signal and inserts a cyclic prefix to generate the first synchronization signal.
  • the at least one symbol is arranged in a first number order
  • each of the at least one symbol includes at least one sampling point
  • all sampling points in the at least one symbol are arranged in a second number order .
  • the first number and the second number are integers that are incremented from zero.
  • Performing phase correction on each of the second synchronization signals by the access network device includes: the access network device according to the sampling frequency, the carrier moving bandwidth, and the second number of the first sampling point in each of the symbols, Determining a phase correction value for each of the symbols, wherein the carrier shifting bandwidth is a frequency difference between the first channel and the second channel, and the second channel is a center frequency point channel in the system bandwidth.
  • the access network device performs phase correction on each symbol according to the phase correction value of each symbol.
  • a method for signal processing comprising: receiving, by a terminal device, a first synchronization signal on a first channel, where the first synchronization signal is generated by performing a first processing on a second synchronization signal, where The first channel is a non-central frequency channel in the system bandwidth.
  • the terminal device performs the first processing on the second template signal to generate a first template signal, where the second template signal is used to perform synchronization signal offset estimation on the synchronization signal received by the terminal device on the second channel, where The second channel is the center frequency point channel in the system bandwidth.
  • the terminal device performs synchronization signal offset estimation according to the first template signal and the first synchronization signal.
  • the terminal device performs channel shifting on the template signal, so that the error of the synchronization signal offset estimation according to the template signal and the synchronization signal is reduced, thereby improving the accuracy of the synchronization signal estimation and improving the synchronization performance of the synchronization signal.
  • the first synchronization signal is generated by performing a first processing on the second synchronization signal, where the first synchronization signal is to map the second synchronization signal from the second channel to the first channel. And perform inverse Fourier transform and insert cyclic prefix generation.
  • the terminal device performs the first processing on the second template signal, and the generating the first template signal includes: the terminal device mapping the second template signal from the second channel to the first channel.
  • the terminal device performs inverse Fourier transform on the second template signal that passes the mapping and inserts a cyclic prefix to generate the first synchronization signal.
  • the synchronization signal of the access network device and the template signal of the terminal device generate the same offset, which reduces the error of the synchronization signal offset estimation.
  • the method further includes: the terminal device receiving the first synchronization signal from the first letter The track moves to the second channel to generate a third synchronization signal.
  • the terminal device moves the first template signal from the first channel to the second channel to generate a third template signal.
  • the determining, by the terminal device, the synchronization signal offset estimation according to the first template signal and the first synchronization signal comprises: the terminal device performing the synchronization signal offset estimation according to the third template signal and the third synchronization signal.
  • the method can reduce the error of the synchronization signal offset estimation while avoiding the reconfiguration of the original configuration of the terminal device.
  • an access network device comprising means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a terminal device comprising means for performing the method of any of the possible implementations of the second aspect or the second aspect.
  • a signal processing system comprising:
  • the terminal device and the access network device of the above third aspect are the terminal device and the access network device of the above third aspect.
  • a signal processing system comprising:
  • the access network device and the terminal device of the above fourth aspect are configured to communicate with the access network device and the terminal device of the above fourth aspect.
  • a seventh aspect provides an access network device, where the access network device includes: a processor and a memory;
  • the memory stores a program, the processor executing the program for performing the signal processing method of the first aspect or any of the possible implementations of the first aspect.
  • a terminal device in an eighth aspect, includes: a processor and a memory;
  • the memory stores a program, the processor executing the program for performing the signal processing method of any of the above-described second aspect or the second aspect of the second aspect.
  • a computer storage medium storing program code for indicating signal processing in performing the above first aspect or any of the possible implementations of the first aspect is provided Method of instruction.
  • a computer storage medium storing program code for indicating signal processing in performing any of the above-mentioned second aspect or the second aspect of the second aspect Method of instruction.
  • the access network device performs phase correction on the second synchronization signal, so that the terminal device can perform synchronization signal offset estimation according to the modified synchronization signal and the template signal; or the terminal device performs the first processing on the second template signal.
  • the first processing is the same as the processing performed by the access network device on the second synchronization signal, so that the terminal device performs synchronization signal offset estimation according to the received processed synchronization signal and the processed template signal.
  • Figure 1 is a schematic structural diagram of system bandwidth
  • 2 is a schematic diagram of synchronization signal transmission
  • FIG. 3 is a schematic structural diagram of a synchronization signal according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a method of signal processing according to still another embodiment of the present application.
  • FIG. 6 is an interaction flowchart of a method for signal processing according to still another embodiment of the present application.
  • FIG. 8 is an interaction flowchart of a method for signal processing according to still another embodiment of the present application.
  • FIG. 9 is a schematic block diagram of an access network device according to an embodiment of the present application.
  • FIG. 10 is a schematic block diagram of a terminal device according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a system for signal processing according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a system for signal processing of another embodiment of the present application.
  • FIG. 13 is a schematic structural diagram of an access network device according to an embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the terminal device in the embodiment of the present application may refer to a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or User device.
  • the terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), with wireless communication.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the network device in the embodiment of the present application may be a device for communicating with the terminal device, and the network device may be a Global System of Mobile communication (GSM) system or Code Division Multiple Access (CDMA).
  • Base Transceiver Station which may also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved base station in an LTE system (Evolutional The NodeB, eNB or eNodeB) may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, an in-vehicle device, a wearable device, and a future.
  • the network device in the 5G network or the network device in the PLMN network in the future is not limited in this embodiment.
  • the LTE system is taken as an example, and the following elements are introduced before the introduction of the embodiment of the present application.
  • Baseband refers to the frequency bandwidth inherent to the original electrical signal from the transmitting end that has not been modulated (eg, spectrally shifted and transformed).
  • the baseband corresponds to the frequency band, which is the frequency bandwidth occupied by the modulation of the baseband signal.
  • Spectrum shifting refers to moving the modulated signal from one frequency point to another at the transmitting end to facilitate frequency division multiplexing of different systems.
  • the embodiment of the present application does not distinguish between “moving" and “mapping”.
  • Cyclic Prefix is a copy of the last N data of Orthogonal Frequency Division Multiplexing (OFDM) symbols.
  • the frequency offset has two main effects on the OFDM system: (1) the signal amplitude is reduced and the signal power is reduced; (2) the inter-carrier interference (ICI) is caused, and the orthogonality between the subcarriers is destroyed. , reducing the performance of the entire system.
  • ICI inter-carrier interference
  • OFDM orthogonal sub-carriers
  • FIG. 1 is a schematic diagram of synchronization signal transmission.
  • subcarrier mapping for example, a 0 , a 1 , . . . , a 13 in FIG. 1
  • Inverse transform ie, generating d 0 , d 1 , . . . , d 13
  • CP ie, generating t
  • the synchronization signal is usually based on the baseband frequency channel generated by the baseband and mapped to the entire bandwidth of the system. As shown in FIG. 2, the system bandwidth is channels #0 to #8, and the center frequency point channel is #4.
  • the transmitting end directly maps the synchronization signal to the center frequency point channel for transmission, and the receiving end performs search processing near the center frequency point channel.
  • the synchronization signal needs to be set in a non-central frequency channel due to the influence of the DC component or the allocation channel limitation, for example, channel #3 in FIG. 2 or other channels than channel #4. .
  • the signal is moved between channels, or the content expressed by channel mapping of the signals is consistent.
  • the multi-symbol synchronization sequence can perform channel mapping on the transmitting end, and move the synchronization signal from the central frequency point channel to the non-central frequency point channel.
  • the receiving end moves the synchronization signal back to the center frequency point channel after searching for the synchronization signal on the corresponding non-central frequency point channel.
  • the synchronization signal after the movement of the transmitter and the receiver is compared with the synchronization signal transmitted directly on the center frequency channel, and the synchronization signal is offset, resulting in a decrease in the synchronization performance of the synchronization signal.
  • a synchronization signal to insert a Cyclic Prefix As shown in FIG. 3, a long sequence is transmitted on 14 symbols (symbol_0, symbol_1, ..., symbol_13, respectively, each symbol having a length of 128 samples. Among them, the symbol length of symbol_0 and symbol7 is 10 sampling points, and the CP length of the remaining symbols is 9 sampling points.
  • the transmitting side synchronization signal is mapped from the #4 channel to the #3 channel, and the synchronization signal mapped to the #3 channel is expressed as:
  • f 0 is the offset of the frequency channel actually transmitted by the synchronization signal relative to the system bandwidth center frequency channel (also referred to as carrier shift bandwidth)
  • f s is the sampling frequency of the system
  • T s 1/f s is Sample point time interval.
  • the synchronization signal after inserting the CP is:
  • the receiving end After receiving the synchronization signal on the #3 channel, the receiving end moves the synchronization signal back to the #4 channel, that is,
  • each sample point of the first symbol produces a phase offset of exp[j*2 ⁇ *(-f 0 )*(-10)*T s ].
  • the second symbol is not a CP part.
  • each sample point of the second symbol produces a phase offset of exp[j*2 ⁇ *(-f 0 )*(-147)*T s ].
  • the second synchronization signal is transmitted through the #3 channel, and the phase offset generated by each symbol is exp[j*2 ⁇ *f 0 *start_idx*T s compared to the transmission of the second synchronization signal on the #4 channel.
  • start_idx is the starting position of the non-CP portion of each symbol (ie the second number of the first sample point in each symbol).
  • the non-central frequency channel in the system bandwidth is referred to as a first channel
  • the central frequency channel in the system bandwidth is referred to as a second channel.
  • FIG. 4 shows a schematic interaction flow diagram of a method of signal processing in accordance with one embodiment of the present application.
  • the access network device performs a first process on the second synchronization signal, and generates a first synchronization signal used to perform synchronization signal offset estimation.
  • the second synchronization signal includes at least one symbol, and the first processing includes the access network device performing phase correction on each symbol in the second synchronization signal.
  • the second synchronization signal may be a baseband based signal, the second synchronization signal may comprise one or more symbols, and the access network device modifies the phase of each symbol. Each symbol is generated separately, and the access network device can correct each symbol one by one.
  • the second synchronization signal S CH4 (i) is mapped from the second channel to the first channel to generate a first synchronization signal:
  • the first process includes: the access network device performs phase modification on each symbol in the second synchronization signal to generate a third synchronization signal, and then maps the third synchronization signal from the second channel to the first channel to generate a fourth synchronization signal.
  • the synchronization signal is finally subjected to inverse Fourier transform of the fourth synchronization signal and inserted into the CP to generate the first synchronization signal.
  • the embodiment of the present application corrects the phase of each symbol of the synchronization signal before subcarrier mapping (ie, mapping from the second channel to the first channel), so that the synchronization signal is generated after being moved between different channels.
  • the signal offset is reduced, thereby improving the accuracy of the synchronization signal offset estimation.
  • the embodiment of the present application corrects the synchronization signal before subcarrier mapping, and can avoid interference of other sequences into the synchronization signal.
  • the first processing may also be that the access network device maps the fifth synchronization signal from the second channel to the first channel to generate a second synchronization signal, and then performs phase correction on each symbol in the second synchronization signal to generate a third synchronization signal. And finally performing inverse Fourier transform on the third synchronization signal and inserting a cyclic prefix to generate the first synchronization signal.
  • the access network device can be applied to the channel mapping after the synchronization signal is first performed, then the phase correction is performed, and finally the Fourier transform scene is performed, and the channel mapping can be performed first, then the phase correction is performed, and finally the Fourier transform is performed.
  • the embodiment of the present application does not limit this.
  • the first process may include other possible processing operations, which are not described in detail herein.
  • the first synchronization signal sent by the access network device may be a synchronization signal after an inverse Fourier transform and an operation such as inserting a CP, so that the second number of the first sampling point in each symbol is inserted into the CP. The second number of the first sample point in each subsequent symbol. If the access network device does not need to go through the insert CP step, the second number of the first sample point in each symbol is adjacent to the second number of the last sample point of the previous symbol.
  • the at least one symbol is arranged in a first number order
  • each of the at least one symbol includes at least one sampling point
  • all sampling points in the at least one symbol are arranged in a second number order
  • the first number and the second number are integers that are incremented from 0.
  • the phase correction of each symbol in the second synchronization signal by the access network device specifically includes: the access network device according to the sampling frequency, the carrier moving bandwidth, and the second number of the first sampling point in each symbol , determining the phase correction value of each symbol.
  • the carrier shifting bandwidth is a frequency difference between the first channel and the second channel.
  • the access network device performs phase correction on each symbol according to the phase correction value of each symbol.
  • the sampling frequency is the frequency of the sampling point
  • the carrier moving bandwidth may be the frequency difference between the frequency of the non-central frequency channel and the center frequency channel.
  • the second synchronization signal includes at least one symbol, the at least one symbol is sequentially arranged by number (represented as a first number), and each symbol includes at least one sampling point, and all sampling points in the second synchronization signal are also numbered (represented as The second number is arranged in order, and the number of the first sample point of each symbol is the second The sorting position of the first sampling point arranged in the above order in the synchronization signal.
  • the access network device determines the phase correction value of each symbol according to the sampling frequency, the carrier shifting bandwidth, and the second number of the first sampling point of each symbol.
  • each symbol is 128 samples long, and the sampling point of the first symbol (ie symbol 0) is 0, 1, ..., 127, Next, the sampling point of the second symbol (ie, symbol 1) is 128, 129, ..., 255, and so on, so that the second number of the first sampling point of the second symbol is 128.
  • the CP length of the first symbol and the sixth symbol is 10, and the CP length of other symbols is 9, the first symbol plus the sampling point of the CP is 0, 1, ..., 9, ..., 137, the second symbol plus the sample point of the CP is 138, 139, ..., 146, 147, ..., 274, so that the second number of the first sample point of the second symbol is 147.
  • the f s is a sampling frequency
  • the f 0 is a carrier shifting bandwidth
  • the start_idx is the second number of the first sampling point in each symbol.
  • the access network device can correct the second synchronization signal according to the phase correction value, that is, s(t) is corrected to s(t)*exp(j ⁇ ).
  • the access network device sends the first synchronization signal to the terminal device on the first channel.
  • the access network device may periodically send the first synchronization signal, or may be sent continuously, or may adopt other possible transmission modes, which is not limited in this embodiment of the present application.
  • the terminal device receives the first synchronization signal on the first channel, and performs synchronization signal offset estimation according to the first synchronization signal.
  • the terminal device performs synchronization signal offset estimation according to the first synchronization signal and the template signal.
  • the template signal is used to perform synchronization signal offset estimation on the synchronization signal received on the center frequency channel.
  • the synchronization signal offset estimation may be that the terminal device compares the received signal with the template signal to determine an offset value, so that the subsequent communication data can be compensated, and the synchronization signal offset estimation is improved. Sex.
  • the method for estimating the synchronization signal offset is not limited in the embodiment of the present application.
  • the phase of the synchronization signal is corrected in advance by the access network device, so that the terminal device can perform synchronization offset estimation according to the modified synchronization signal, eliminate signal offset caused by channel shifting, and improve synchronization performance of the synchronization signal.
  • the terminal device may move the first synchronization signal from the first channel to the second channel, and the terminal device performs synchronization signal offset estimation according to the moved first synchronization signal and the template signal, thereby further improving the synchronization signal offset. Estimated accuracy.
  • the synchronization signal offset estimate may also include a frequency offset estimate, such as:
  • f 0 is the offset of the actual transmission center frequency point of the synchronization signal relative to the center frequency of the system bandwidth
  • f s is the sampling frequency of the system
  • T s 1/f s is the sampling point time interval.
  • the initial sequence of multiple symbols sent is the same, only some inversion operations are performed, taking 10 symbols as an example:
  • the receiving end After receiving the synchronization signal on the #3 channel, the receiving end moves the synchronization signal back to the #4 channel, that is,
  • a k ( ⁇ ) Indicates the frequency offset generated by the first symbol and the second symbol from the #4 channel to the #3 channel at the transmitting end and from the #3 channel back to the #4 channel at the receiving end.
  • the terminal device can receive the first synchronization signal with the phase deviation corrected, and perform synchronization signal offset estimation according to the first synchronization signal, thereby improving the accuracy of the frequency offset estimation and improving the synchronization performance of the synchronization signal.
  • the access network device corrects the phase of the synchronization signal in advance, so that the terminal device can perform synchronization signal offset estimation according to the modified synchronization signal, thereby reducing the synchronization signal at the center frequency point channel.
  • the synchronization signal deviation caused by the shift between the non-central frequency channel and the synchronization signal improves the synchronization performance of the synchronization signal.
  • FIG. 6 shows a schematic interaction flow diagram of a method of signal processing in accordance with another embodiment of the present application.
  • the terminal device receives the first synchronization signal on the first channel.
  • the first synchronization signal is generated by the access network device performing the first processing on the second synchronization signal.
  • an access network device may map a second synchronization signal from a second channel to a first channel through a subcarrier mapping, and perform inverse Fourier transform and insert the mapped synchronization signal into the CP to generate a first Synchronization signal.
  • the second synchronization signal may be a baseband based signal, and the second synchronization signal may include one or more symbols.
  • the access network device performs subcarrier mapping on the second synchronization signal (ie, mapping the second synchronization signal from the center frequency channel to the non-central frequency channel) to generate a 0 , a 1 , . . . , a 13 .
  • the terminal device performs a first process on the second template signal to generate a first template signal.
  • the second template signal is used for performing synchronization signal offset estimation on the synchronization signal received by the terminal device on the second channel.
  • the terminal device when the access network device directly sends the second synchronization signal to the terminal device in the center frequency channel, the terminal device performs the synchronization signal offset estimation on the second synchronization signal and the second template signal received by the center frequency channel. .
  • the terminal device performs the same processing step as the second synchronization signal on the second template signal to generate the first template signal, such that the synchronization signal of the access network device and the template signal of the terminal device generate the same phase offset due to channel shifting.
  • the first synchronization signal is generated by performing a first processing on the second synchronization signal, where the first synchronization signal is to map the second synchronization signal from the second channel to the second synchronization signal.
  • Decoding the first channel and performing the inverse Fourier transform and inserting the cyclic prefix; the terminal device performs the first processing on the second template signal, and the generating the first template signal includes: the terminal device Transmitting a signal from the second channel to the first channel; the terminal device performs inverse Fourier transform on the second template signal that passes the mapping, and inserts a cyclic prefix to generate The first synchronization signal.
  • the terminal device performs the same processing on the template signal, so that the synchronization signal of the access network device and the template of the terminal device The signal produces the same sync signal offset, reducing the error in the sync signal offset estimate.
  • the first process may include a channel mapping and an inverse Fourier transform, or the first process may include a channel mapping and an insert CP operation.
  • the order of execution of the three steps of the subcarrier mapping, the inverse Fourier transform, and the insertion of the CP in the first processing is not limited in the embodiment of the present application.
  • the terminal device performs synchronization signal offset estimation according to the first template signal and the first synchronization signal.
  • the terminal device performs synchronization signal offset estimation according to the modified template signal (ie, the first template signal) and the first synchronization signal, that is, the terminal device performs second synchronization with the access network device by using the second template signal.
  • the same processing performed by the signal reduces the error of the synchronization signal offset estimation according to the template signal and the synchronization signal, thereby improving the accuracy of the synchronization signal estimation and improving the synchronization performance of the synchronization signal.
  • the method further includes: the terminal device moves the first synchronization signal from the first channel to the second channel, to generate a third synchronization signal; and the terminal device uses the first template Transmitting a signal from the first channel to the second channel to generate a third template signal; wherein, the terminal device performing synchronization signal offset estimation according to the first template signal and the first synchronization signal comprises: the terminal device according to the The third template signal and the third synchronization signal perform the synchronization signal offset estimation. Therefore, the present embodiment can reduce the error of the synchronization signal offset estimation while avoiding the reconfiguration of the original configuration of the terminal device.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the terminal device receives the first synchronization signal generated by the access network device performing the first processing on the second synchronization, and performing the first processing on the second template signal to generate the first template signal. And performing synchronization signal offset estimation according to the first synchronization signal and the first template signal, so that the terminal device performs the same processing on the second template signal as the second synchronization signal on the access network device, so that the access network device synchronizes.
  • the signal and the template signal of the terminal device generate the same synchronization signal offset, which reduces the error of the synchronization signal offset estimation, thereby improving the synchronization performance of the synchronization signal.
  • FIG. 9 shows a schematic block diagram of an access network device 900 in accordance with an embodiment of the present application.
  • the access network device 900 includes:
  • the processing module 910 is configured to perform a first process on the second synchronization signal to generate a first synchronization signal for performing synchronization signal offset estimation, where the second synchronization signal includes at least one symbol, and the first processing includes Each symbol in the second synchronization signal is phase corrected.
  • the sending module 920 is configured to send the first synchronization signal to the terminal device on the first channel, where the first channel is a non-central frequency channel in the system bandwidth.
  • the access network device in the embodiment of the present application can correct the phase of the synchronization signal in advance, so that the terminal device can perform synchronization signal offset estimation according to the modified synchronization signal, thereby reducing the synchronization signal at the center frequency point channel and the non-center frequency.
  • the synchronization signal deviation caused by the shift between the dot channels improves the synchronization performance of the synchronization signal.
  • the processing where the processing module 910 is configured to perform the first processing on the second synchronization signal, specifically includes:
  • the fourth synchronization signal is subjected to inverse Fourier transform and a cyclic prefix is inserted to generate the first synchronization signal.
  • the processing where the processing module 910 is configured to perform the first processing on the second synchronization signal, specifically includes:
  • the third synchronization signal is subjected to inverse Fourier transform and a cyclic prefix is inserted to generate the first synchronization signal.
  • the at least one symbol may be arranged in a first numbered order as described in the method of FIG. 4, each of the at least one symbol comprising at least one sampling point, and all sampling points in the at least one symbol Arranged in the second number order, the first number and the second number are integers increasing from 0.
  • Phase correction of each of the second synchronization signals includes:
  • the processing module 910 is further configured to determine a phase correction value of each symbol according to the sampling frequency, the carrier shifting bandwidth, and the second number of the first sampling point in each of the symbols, where the carrier shifting bandwidth is the first a frequency difference between a channel and a second channel, the second channel being a non-central frequency channel in the system bandwidth;
  • the processing module 910 is further configured to perform phase correction on each of the symbols according to the phase correction value of each symbol.
  • the access network device in the embodiment of the present application generates a first synchronization signal by performing a first process of modifying a phase of each symbol in the second synchronization signal on the second synchronization signal, and is in the second channel to the terminal device. Transmitting the first synchronization signal, the terminal device performs synchronization signal offset estimation according to the first synchronization signal, so that the access network device can correct the phase of the synchronization signal in advance, so that the terminal device can perform synchronization signal offset according to the modified synchronization signal. It is estimated that the synchronization signal deviation generated by the synchronization signal between the center frequency point channel and the non-central frequency point channel is reduced, and the synchronization performance of the synchronization signal is improved.
  • FIG. 10 shows a schematic block diagram of a terminal device 1000 in accordance with an embodiment of the present application.
  • the terminal device 1000 includes:
  • the receiving module 1010 is configured to receive a first synchronization signal on the first channel, where the first synchronization signal is generated by performing a first processing on the second synchronization signal, where the first channel is a non-central frequency channel in the system bandwidth. ;
  • the processing module 1020 is configured to perform the first processing on the second template signal to generate a first template signal, where the second template signal is used to synchronize the second synchronization signal received by the terminal device on the second channel.
  • Signal offset estimation, the second channel is a center frequency point channel in the system bandwidth;
  • the processing module 1020 is further configured to perform synchronization signal offset estimation according to the first template signal and the first synchronization signal received by the receiving module 1010.
  • the terminal device in the embodiment of the present application generates the first processing by using the receiving access network device to generate the first synchronization.
  • the first synchronization signal, and the second template signal is subjected to the first processing to generate a first template signal, and the synchronization signal offset estimation is performed according to the first synchronization signal and the first template signal, so that the terminal device performs the second template signal Performing the same processing on the second synchronization signal with the access network device, so that the synchronization signal of the access network device and the template signal of the terminal device generate the same synchronization signal offset, thereby reducing the error of the synchronization signal offset estimation, thereby improving the error. Synchronization performance of the sync signal.
  • the first synchronization signal is generated by performing a first processing on the second synchronization signal, where the first synchronization signal is to map the second synchronization signal from the second channel to the first Channel, and perform inverse Fourier transform and insert cyclic prefix generation.
  • the processing module 1020 is specifically configured to: move the second template signal from the second channel to the first channel; perform inverse Fourier transform on the second template signal that has undergone the moving, and insert a cyclic prefix to generate the first A synchronization signal.
  • the terminal device 1000 further includes: the processing module 1020, further configured to: move the first synchronization signal from the first channel to the second channel, to generate a third synchronization signal;
  • the module 1020 is further configured to: move the first template signal from the first channel to the second channel to generate a third template signal;
  • the processing module 1020 is specifically configured to: according to the third template signal and the third synchronization signal , the synchronization signal offset estimation is performed.
  • the terminal device in the embodiment of the present application receives the first synchronization signal on the first channel, and performs a second template signal for performing synchronization signal offset estimation according to the second template signal received on the second channel.
  • Phase correction generates a first template signal, and moves the first template signal back to the second channel to generate a third template signal, and moves the first synchronization signal back to the second channel to generate a third synchronization signal, according to the third template signal and the third
  • the synchronization signal performs synchronization signal offset estimation, so that the terminal device reduces the error of the synchronization signal offset estimation by correcting the phase of the template signal, thereby improving the synchronization performance of the synchronization signal and reducing the improvement of the terminal device.
  • Figure 11 shows a system 1100 for signal processing in accordance with one embodiment of the present application, the system comprising:
  • Figure 12 illustrates a system 1200 for signal processing in accordance with another embodiment of the present application, the system comprising:
  • the access network device 1210 and the terminal device 1000 in the embodiment shown in FIG. 1 are The access network device 1210 and the terminal device 1000 in the embodiment shown in FIG.
  • FIG. 13 is a schematic structural diagram of an access network device according to an embodiment of the present application.
  • the access network device includes at least one processor 1302 (eg, a general purpose processor CPU with computing and processing capabilities, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), etc.), the processor 1302 is configured to manage and schedule modules and devices in the access network device.
  • the processing module 910 in the embodiment shown in FIG. 9 can be implemented by the processor 1302.
  • the access network device also includes at least one transceiver 1305 (receiver/transmitter 1305), a memory 1306, and at least one bus system 1303.
  • the transmitting module 920 in the embodiment shown in FIG.
  • the various components of the network device are coupled together by a bus system 1303, which may include a data bus, a power bus, a control bus, a status signal bus, etc., but for clarity of description, various buses are labeled as buses in the figure.
  • the method disclosed in the above embodiments of the present application may be applied to the processor 1302 or used to execute an executable module, such as a computer program, stored in the memory 1306.
  • the memory 1306 may include a high speed random access memory (RAM), and may also include a non-volatile memory.
  • the memory may include a read only memory and a random access memory, and provide the processor with Required signaling or data, programs, etc.
  • a portion of the memory may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • a communication connection with at least one other network element is achieved by at least one transceiver 1305 (which may be wired or wireless).
  • the memory 1306 stores a program 13061
  • the processor 1302 executes the program 13061 for performing the following operations:
  • the first synchronization signal is sent to the terminal device on the first channel, where the first channel is a non-central frequency channel in the system bandwidth.
  • the access network device may be specifically the access network device in the foregoing embodiments, and may be used to perform various steps and/or processes corresponding to the access network device in the foregoing method embodiments.
  • the terminal device can perform synchronization signal offset estimation according to the modified synchronization signal, thereby reducing the channel and the non-synchronization signal at the center frequency point.
  • the synchronization signal deviation caused by the shift between the center frequency channels improves the synchronization performance of the synchronization signal.
  • FIG. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the terminal device includes at least one processor 1402 (eg, a general purpose processor CPU with computing and processing capabilities, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA).
  • the processor 1402 is configured to manage and schedule modules and devices within the terminal device.
  • the processing module 1020 in the embodiment shown in FIG. 10 can be implemented by the processor 1302.
  • the terminal device also includes at least one transceiver 1405 (receiver/transmitter 1405), a memory 1406, and at least one bus system 1403.
  • the receiving module 1010 in the embodiment shown in FIG. 10 can be implemented by the transceiver 1405.
  • bus system 1403 which may include a data bus, a power bus, a control bus, a status signal bus, etc., but for clarity of description, various buses are labeled as buses in the figure.
  • the method disclosed in the above embodiments of the present application may be applied to the processor 1402 or used to execute an executable module, such as a computer program, stored in the memory 1406.
  • the memory 1406 may include a high speed random access memory (RAM), and may also include a non-volatile memory.
  • the memory may include a read only memory and a random access memory, and provides the processor with Required signaling or data, programs, etc.
  • a portion of the memory may also include non-volatile line random access memory (NVRAM).
  • NVRAM non-volatile line random access memory
  • a communication connection with at least one other network element is achieved by at least one transceiver 1405 (which may be wired or wireless).
  • the memory 1406 stores a program 14061, and the processor 1402 executes the program 14061 for performing the following operations:
  • the first channel Receiving, by the first channel, the first synchronization signal, where the first synchronization signal is generated by performing a first processing on the second synchronization signal, where the first channel is a non-central frequency channel in the system bandwidth;
  • the second template signal is used to perform synchronization signal offset estimation on the second synchronization signal received by the terminal device on the second channel, where
  • the second channel is a central frequency point channel in the bandwidth of the system
  • Synchronization signal offset estimation is performed based on the first template signal and the first synchronization signal.
  • the terminal device may be specifically the terminal device in the foregoing embodiments, and may be used to perform various steps and/or processes corresponding to the terminal device in the foregoing method embodiments.
  • the first synchronization signal generated by performing the first processing on the second synchronization by the access network device, and performing the first processing on the second template signal to generate the first template Signal, Performing synchronization signal offset estimation according to the first synchronization signal and the first template signal, so that the terminal device performs the same processing on the second template signal as the second synchronization signal on the access network device, so that the synchronization signal of the access network device is performed.
  • the same synchronization signal offset is generated by the template signal of the terminal device, which reduces the error of the synchronization signal offset estimation, thereby improving the synchronization performance of the synchronization signal.
  • the embodiment of the present application further provides a computer storage medium, which can store program instructions for indicating any of the above methods.
  • the storage medium may be specifically a memory 1306 or a memory 1406.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • 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, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like.
  • the medium of the code includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé, un dispositif, et un système de traitement de signal. Le procédé de traitement de signal comprend les étapes suivantes : un dispositif de réseau d'accès exécute un premier traitement sur un second signal de synchronisation de sorte à générer un premier signal de synchronisation pour estimer un décalage de signal de synchronisation, le second signal de synchronisation comprenant au moins un symbole, et le premier traitement comprenant l'exécution d'une correction de phase par le dispositif de réseau d'accès sur chaque symbole dans le second signal de synchronisation ; et le dispositif de réseau d'accès envoie le premier signal de synchronisation à un dispositif terminal sur un premier canal, le premier canal étant un canal de point de fréquence non central dans la bande passante du système. En corrigeant la phase d'un signal de synchronisation à l'avance, le dispositif de réseau d'accès décrit dans les modes de réalisation de la présente invention permet à un dispositif terminal d'exécuter une estimation de décalage de signal de synchronisation d'après le signal de synchronisation corrigé. Cela réduit une déviation du signal de synchronisation générée pendant le mouvement du signal de synchronisation entre un canal de point de fréquence central et un canal de point de fréquence non central, et améliore les performances de synchronisation du signal de synchronisation.
PCT/CN2017/101850 2016-09-26 2017-09-15 Procédé, dispositif, et système de traitement de signal WO2018054264A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610849168.9A CN107872868B (zh) 2016-09-26 2016-09-26 信号处理的方法、设备和系统
CN201610849168.9 2016-09-26

Publications (1)

Publication Number Publication Date
WO2018054264A1 true WO2018054264A1 (fr) 2018-03-29

Family

ID=61690188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/101850 WO2018054264A1 (fr) 2016-09-26 2017-09-15 Procédé, dispositif, et système de traitement de signal

Country Status (2)

Country Link
CN (1) CN107872868B (fr)
WO (1) WO2018054264A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109510791A (zh) * 2017-09-15 2019-03-22 华为技术有限公司 传输方法和传输装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101383802A (zh) * 2008-10-24 2009-03-11 中兴通讯股份有限公司 同步信号序列的发送方法和装置
CN101383801A (zh) * 2008-10-21 2009-03-11 中兴通讯股份有限公司 同步信号序列的发送方法和装置
WO2009076901A1 (fr) * 2007-12-10 2009-06-25 Huawei Technologies Co., Ltd. Procédé et dispositif de traitement de signal basés sur une régulation automatique de fréquence
CN103873415A (zh) * 2014-03-11 2014-06-18 华为技术有限公司 频偏估计方法、装置及接收机

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102165743B (zh) * 2008-09-25 2015-02-25 爱立信电话股份有限公司 Ofdm信号处理

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009076901A1 (fr) * 2007-12-10 2009-06-25 Huawei Technologies Co., Ltd. Procédé et dispositif de traitement de signal basés sur une régulation automatique de fréquence
CN101383801A (zh) * 2008-10-21 2009-03-11 中兴通讯股份有限公司 同步信号序列的发送方法和装置
CN101383802A (zh) * 2008-10-24 2009-03-11 中兴通讯股份有限公司 同步信号序列的发送方法和装置
CN103873415A (zh) * 2014-03-11 2014-06-18 华为技术有限公司 频偏估计方法、装置及接收机

Also Published As

Publication number Publication date
CN107872868B (zh) 2020-04-03
CN107872868A (zh) 2018-04-03

Similar Documents

Publication Publication Date Title
CN105897641B (zh) 无线通信网络中的小区搜索
JP6262849B2 (ja) 送信機、受信機、および同期信号を送信／受信するための方法
JP6462952B2 (ja) 信号送信又は受信方法及び装置
EP3343856B1 (fr) Procédé et appareil pour émettre un signal de synchronisation
WO2018018417A1 (fr) Procédé et appareil de transmission d'informations
CN109391403B (zh) 用于无线信号的发送和接收的方法和装置
KR20100046565A (ko) 무선 통신 시스템에서 순환 전치 길이 변경 방법 및 이를 위한 시스템
CN103873397A (zh) 一种新的联合时域和频域正交频分复用接收信道估计方法
WO2016019519A1 (fr) Procédé et appareil pour transmettre des informations de liaison montante multi-utilisateur dans un système entrée multiple sortie multiple
CN108289069B (zh) 一种参考信号的传输方法、发送端和接收端
CN111034142A (zh) 产生和检测前导码符号的装置和方法
US9674808B1 (en) Method and apparatus for early frequency synchronization in LTE wireless communication systems
WO2017059719A1 (fr) Procédé et dispositif de transmission de données
WO2012171407A1 (fr) Procédé et dispositif de détermination de position de synchronisation temporelle
WO2018054264A1 (fr) Procédé, dispositif, et système de traitement de signal
WO2016115695A1 (fr) Procédé, appareil et système de synchronisation
Nasraoui et al. A simply-differential low-complexity primary synchronization scheme for 3GPP LTE systems
WO2012109928A1 (fr) Procédé, dispositif et système pour traiter un signal
WO2018028343A1 (fr) Procédé et dispositif d'émission de signaux
CN104935545B (zh) 产生ofdm训练序列的方法及ofdm同步方法
CN111294181B (zh) 符号数据发送及接收方法、存储介质、发送端设备、接收端设备
CN108156108B (zh) 一种ofdm符号的起点位置确定方法及设备
CN103346985A (zh) 一种用于td-lte系统中时频参数快速估计的方法
CN112134676A (zh) 参考信号传输方法、装置、通信节点及存储介质
CN107453853B (zh) 一种导频传输的方法及设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17852332

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17852332

Country of ref document: EP

Kind code of ref document: A1