WO2016197324A1 - Procédé et appareil de traitement de signal, et système - Google Patents

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

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Publication number
WO2016197324A1
WO2016197324A1 PCT/CN2015/081071 CN2015081071W WO2016197324A1 WO 2016197324 A1 WO2016197324 A1 WO 2016197324A1 CN 2015081071 W CN2015081071 W CN 2015081071W WO 2016197324 A1 WO2016197324 A1 WO 2016197324A1
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WO
WIPO (PCT)
Prior art keywords
frequency band
frequency
subcarriers
point
side device
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PCT/CN2015/081071
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English (en)
Chinese (zh)
Inventor
孙方林
王祥
涂建平
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2015/081071 priority Critical patent/WO2016197324A1/fr
Priority to CN201580001080.5A priority patent/CN107113126B/zh
Publication of WO2016197324A1 publication Critical patent/WO2016197324A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter

Definitions

  • the present invention relates to the field of data communications, and in particular to a signal processing method, apparatus and system.
  • DSL Digital Subscriber Line
  • UDP Unshielded Twist Pair
  • DSL technologies include Asymmetrical Digital Subscriber Line (ADSL), Very-high-bit-rate Digital Subscriber Line (VDSL), and Very High-Speed Digital Subscriber Line 2 (Very-high-bit- Rate Digital Subscriber Line 2, VDSL2) and Single-pair High-bit-rate Digital Subscriber Line (SHDSL).
  • a device that provides multiple DSL access for Customer Premises Equipment (CPE) is called a DSL Access Multiplexer (DSLAM).
  • DSL Access Multiplexer DSL Access Multiplexer
  • VDSL next-generation VDSL
  • VDSL2 will extend the spectrum of VDSL2 up to 17.664MHz to more than 30MHz, and the high spectrum will naturally lead to high crosstalk on the line, and crosstalk in the high frequency band is also It cannot be eliminated directly by the crosstalk elimination method of VDSL2, which will seriously affect the signal transmission on the line.
  • the embodiment of the invention provides a signal processing method, device and system, which are implemented.
  • an embodiment of the present invention provides a signal processing method, where the method includes
  • the network side device divides the frequency band used for transmitting the downlink synchronization symbol into at least two parts that do not overlap. a frequency band, wherein the two frequency bands are a first frequency band and a second frequency band; wherein a lowest frequency point of the second frequency band is higher than a highest frequency point of the first frequency band;
  • the carrier and the labeled subcarrier are symmetric based on a symmetric point; the symmetric point is a lowest frequency point of the second frequency band, a highest frequency point of the first frequency band, or a lowest frequency point of the second frequency band, and the first a frequency point between the highest frequency points of a frequency band;
  • the network side device modulates the downlink pilot sequence to the probe subcarriers on the first frequency band and the second frequency band, and then sends the downlink pilot sequence to the peer device.
  • the allocating the frequency points on the first frequency band and the second frequency band to the detecting subcarriers and marking the subcarriers specifically includes: performing the first frequency band according to the comb structure The frequency points are alternately allocated to the detecting subcarriers and the labeled subcarriers, and the frequency points on the second frequency band are alternately allocated to the detecting subcarriers and the labeled subcarriers.
  • the sounding subcarriers on the second frequency band and the sounding subcarriers on the first frequency band are different from each other.
  • the frequency band used by the network device to send the downlink synchronization symbol is used to send the downlink synchronization symbol in the DSL mode of two different spectrums.
  • the combination of the frequency bands; the highest frequency point of the first frequency band is not higher than the highest frequency point of the overlapping frequency band for transmitting the downlink synchronization symbol in the DSL mode of the two different spectrums.
  • the network side device modulates a downlink pilot sequence to the sounding subcarriers and the labeled subcarriers on the first frequency band and the second frequency band in an initialization phase;
  • a downlink pilot sequence is modulated onto the sounding subcarriers on the first and second frequency bands during a data transmission phase.
  • the symmetry Point is in design Fixedly set in the standby, or determined by interactive negotiation with the peer device during the handshake phase or initialization phase.
  • the method receives the signal fed back by the peer device, and the signal fed back by the peer device reflects that the peer device receives the detected subcarriers on the first frequency band and the second frequency band. The signal to.
  • the signal that is sent back by the peer device is an error sample of the signal received by the peer device on the detecting subcarriers in the first frequency band and the second frequency band. a signal, or a signal obtained by frequency domain conversion of a received signal on the detected subcarriers on the first frequency band and the second frequency band.
  • an embodiment of the present invention provides a signal processing method, where the method includes
  • the user side device divides the frequency band used for transmitting the uplink synchronization symbol into at least two frequency bands that do not overlap, the two frequency bands are the first frequency band and the second frequency band; the lowest frequency point of the second frequency band is higher than the foregoing The highest frequency point of a frequency band;
  • the carrier and the labeled subcarrier are symmetric based on a symmetric point; the symmetric point is a lowest frequency point of the second frequency band, a highest frequency point of the first frequency band, or a lowest frequency point of the second frequency band, and the first a frequency point between the highest frequency points of a frequency band;
  • the user side device modulates the uplink pilot sequence to the sounding subcarriers on the first frequency band and the second frequency band, and then sends the uplink pilot sequence to the peer device.
  • the sounding subcarriers on the second frequency band and the sounding subcarriers on the first frequency band are different from each other.
  • the frequency band used by the user side device to send the uplink synchronization symbol is used to send uplink synchronization in the DSL mode of two different spectrums.
  • the combination of the frequency bands of the symbol, the highest frequency point of the first frequency band is not higher than the highest frequency point of the overlapping frequency band for transmitting the uplink synchronization symbol in the DSL mode of the two different spectrums.
  • the user side device modulates an uplink pilot sequence to the sounding subcarriers and the labeled subcarriers on the first frequency band and the second frequency band in an initialization phase;
  • the uplink pilot sequence is modulated onto the sounding subcarriers on the first and second frequency bands during a data transmission phase.
  • the symmetric point is fixedly set in the device, or is mutually negotiated with the peer device in a handshake phase or an initialization phase. After the determination.
  • an embodiment of the present invention provides a network side device, where the network side device includes a spectrum division module and a signal sending module;
  • the spectrum division module divides a frequency band used for transmitting a downlink synchronization symbol into at least two frequency bands that do not overlap, the two frequency bands are a first frequency band and a second frequency band; and a lowest frequency point of the second frequency band is higher than The highest frequency point of the first frequency band; and the frequency points on the first frequency band and the second frequency band are allocated to the sounding subcarrier and the labeled subcarrier, so that the sounding subcarriers and the marker distributed on the second frequency band are
  • the carrier is respectively symmetric with a detecting subcarrier and a labeled subcarrier distributed on the first frequency band based on a symmetric point; the symmetric point is a lowest frequency point of the second frequency band, a highest frequency point of the first frequency band, or the a frequency point between the lowest frequency point of the second frequency band and the highest frequency point of the first frequency band;
  • the signal sending module is configured to: the network side device modulates the downlink pilot sequence to the detecting subcarriers on the first frequency band and the second frequency band, and then sends the downlink pilot sequence to the peer device.
  • the sounding subcarriers on the second frequency band and the sounding subcarriers on the first frequency band are different from each other.
  • the frequency band used for transmitting the downlink synchronization symbol is a combination of frequency bands for transmitting downlink synchronization symbols in the DSL mode of two different spectrums; the highest frequency point of the first frequency band is not higher than the DSL modes of the two different spectrums The highest frequency point of the overlapping frequency band of the downlink synchronization symbol is transmitted.
  • the spectrum division module allocates frequency points on the first frequency band and the second frequency band to the probe subcarrier and the labeled subcarrier.
  • the spectrum division module alternately allocates frequency points on the first frequency band to the detection subcarriers and the labeled subcarriers according to the comb structure, and alternately allocates frequency points on the second frequency band to the detection subcarriers and the labeled subcarriers.
  • the network side device further includes a signal receiving module, configured to receive a signal that is fed back by the peer device, where the signal reflects the peer end A signal received by the device on the sounding subcarriers on the first frequency band and the second frequency band.
  • the signal transmitting module And modulating a downlink pilot sequence to the sounding subcarriers and the labeled subcarriers on the first frequency band and the second frequency band in an initialization phase; and modulating the downlink pilot sequence to the first frequency band and the second in a data transmission phase On the probe subcarriers in the band.
  • the network side device is a DSLAM device
  • the spectrum division module is a processing chip in a DSLAM device
  • the signal sending module is a signal transmitter in a DSLAM.
  • the embodiment of the present invention provides a user side device, where the user side device includes a spectrum division module and a signal sending module, and the spectrum dividing module divides the frequency band used for sending the uplink synchronization symbol into non-overlapping At least two frequency bands, the two frequency bands are a first frequency band and a second frequency band; a lowest frequency point of the second frequency band is higher than a highest frequency point of the first frequency band; and the first frequency band and the first frequency band
  • the frequency points on the second frequency band are allocated to the sounding subcarriers and the labeled subcarriers, so that the sounding subcarriers and the labeled subcarriers distributed on the second frequency band are respectively distributed with the sounding subcarriers distributed on the first frequency band.
  • the labeled subcarrier is symmetric based on a symmetric point;
  • the symmetric point is a lowest frequency point of the second frequency band, a highest frequency point of the first frequency band or a lowest frequency point of the second frequency band, and the first a frequency point between the highest frequency points of the frequency band;
  • the signal sending module is configured to modulate the uplink pilot sequence to the detecting subcarriers on the first frequency band and the second frequency band, and then send the uplink pilot sequence to the opposite device.
  • the frequency band used for transmitting the uplink synchronization symbol is a combination of frequency bands used for transmitting uplink synchronization symbols in two different spectrum DSL modes,
  • the highest frequency point of the first frequency band is not higher than the highest frequency point of the overlapping frequency band for transmitting the uplink synchronization symbol in the DSL mode of the two different spectrums.
  • the signal sending module modulates an uplink pilot sequence to the first frequency band and the second frequency band in an initialization phase Subcarriers and labeled subcarriers; and modulating an uplink pilot sequence to the sounding subcarriers on the first and second frequency bands during a data transmission phase.
  • the user side device is a customer premises equipment (CPE)
  • the spectrum division module is A processing chip in the CPE, the signal transmitting module being a signal transmitter in the CPE.
  • an embodiment of the present invention provides a network system, including a network side device and a user side device, where the network side device and the user side device are connected by a twisted pair; the network side device is the network side device; Alternatively, the user side device is the user side device described above.
  • the overlapping frequency band is used as a part of the frequency band
  • the non-overlapping frequency band is used as another part of the frequency band
  • the two frequency bands are allocated.
  • Subcarriers including labeled subcarriers and sounding subcarriers
  • the subcarriers can be aligned with the original subcarrier position even after mirroring. And because the subcarriers are aligned, the crosstalk channel can be estimated normally for use. Crosstalk cancellation.
  • FIG. 1 is a schematic diagram of a connection relationship of a DSLAM system
  • FIG. 2 is a schematic flowchart diagram of a signal processing method according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of frequency point allocation according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart diagram of another signal processing method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a user side device according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a general network component according to an embodiment of the present invention.
  • the transmit signal may be pre-compensated on the network side (the CO side) according to the crosstalk parameter fed back on the user side (ie, the CPE side).
  • the technique is called Vectoring processing.
  • the device for vectorization processing is a Vectoring Control Entity (VCE) in the DSLAM.
  • VCE Vectoring Control Entity
  • the VCE modulates a specified downlink pilot sequence to a probe sub-stream of a downlink synchronization symbol in an initialization phase and a data transmission phase (Showtime phase).
  • Showtime phase Showtime phase
  • the embodiment of the invention provides a signal processing method, as shown in FIG. 2, including
  • Step 201 The frequency band used by the network side device to send the downlink synchronization symbol is divided into at least two frequency bands that are not overlapped, and the two frequency bands are the first frequency band and the second frequency band; wherein the lowest frequency point of the second frequency band is higher than The highest frequency point of the first frequency band.
  • the frequency band used by the network device to transmit the downlink synchronization symbol is 0-35.328 MHz, and the 0-35.328 MHz may be divided into two frequency bands.
  • the highest frequency point of the first frequency band is not higher than 17.664 MHz; the lowest frequency point of the second frequency band is higher than two of the highest frequency points of the first frequency band.
  • the frequency point is the center frequency value of the frequency band in which the subcarrier or subchannel is located.
  • the frequency band used by the network device to send the downlink synchronization symbol may be a combination of frequency bands used for transmitting downlink synchronization symbols in two different spectrum DSL modes, for example, the network device can simultaneously support VDSL2 (eg, VDSL2 17a) and The next-generation VDSL (such as VDSL2 35b), which supports the collection of frequency bands for transmitting downlink synchronization symbols under these two systems.
  • VDSL2 eg, VDSL2 17a
  • the next-generation VDSL such as VDSL2 35b
  • the frequency band used for transmitting downlink synchronization symbols in VDSL2 mode is 0-176.64 MHz, and the next-generation VDSL mode.
  • the frequency band used for transmitting the downlink synchronization symbol is at least 0-35.328 MHz, and the frequency band collection for transmitting the downlink synchronization symbol in these two modes is 0-35.328 MHz.
  • the highest frequency point of the first frequency band is not higher than the highest frequency point of the overlapping frequency band for transmitting the downlink synchronization symbol in the DSL mode of the two different spectrums.
  • the sounding subcarriers on the second frequency band and the sounding subcarriers on the first frequency band are different from each other.
  • Step 203 Allocating frequency points on the first frequency band and the second frequency band to the sounding subcarriers and the labeled subcarriers, so that the sounding subcarriers and the labeled subcarriers distributed on the second frequency band are respectively distributed on the first frequency band.
  • the sounding subcarrier and the labeled subcarrier are symmetric based on a symmetric point; the symmetric point is a lowest frequency point of the second frequency band, a highest frequency point of the first frequency band, or a lowest frequency point of the second frequency band a frequency point between the highest frequency points of the first frequency band.
  • Step 205 The network side device modulates the downlink pilot sequence to the detecting subcarriers on the first frequency band and the second frequency band, and then sends the downlink pilot sequence to the peer device.
  • the method further includes: step 207 (not shown): the network side device And receiving a signal that is sent back by the peer device, where the signal fed back by the peer device reflects a signal received by the peer device on the detecting subcarriers in the first frequency band and the second frequency band.
  • the signal fed back by the peer device is an error sample signal of the signal received by the peer device on the detecting subcarriers in the first frequency band and the second frequency band, or A signal obtained by frequency domain conversion of a received signal on a sounding subcarrier on the first frequency band and the second frequency band.
  • the foregoing assigning the frequency points on the first frequency band and the second frequency band to the detecting subcarriers and marking the subcarriers specifically includes: alternately allocating frequency points on the first frequency band to the detecting subcarriers and marking subcarriers according to the comb structure, The frequency points on the two frequency bands are alternately allocated to the sounding subcarriers and the labeled subcarriers.
  • Fig. 3 shows an example in which frequency points on the first frequency band are alternately allocated to the probe subcarriers and the labeled subcarriers in a comb structure.
  • the range of 0 to 17.664 MHz corresponds to the frequency point of the sequence number 0 to 4095.
  • the frequency points of the sequence numbers 10n, 10n+2, 10n+3, 10n+4, 10n+5, 10n+6, 10n+8, and 10n+9 Assigned to the probe subcarriers, where n is a non-negative integer; the frequency points with sequence numbers 10n+1 and 10n+7 are assigned to the labeled subcarriers.
  • the second frequency band that is, the range of 17.665 MHz to 35.328 MHz corresponds to the frequency point of the serial number of 4097 to 8191
  • the subcarriers of the sequence numbers 10n+1 and 10n+5 are assigned labeled subcarriers, and the sequence numbers are 10n, 10n+2.
  • the frequency points of 10n+3, 10n+4, 10n+6, 10n+7, 10n+8, and 10n+9 are allocated to the probe subcarrier; here, the two subcarriers are symmetric based on the sequence number of 4096. Further, the frequency point between the symmetric frequency point 4096 or the two frequency bands may be allocated to any one of the subcarriers (including the probe subcarrier or the labeled subcarrier).
  • the distribution rules of the labeled subcarriers and the detected subcarriers on the two subcarriers are different, and the distribution rule is the above-mentioned distribution function or law, for example, the distribution function of the labeled subcarriers in the first frequency band is 10n+1 and 10n+7, the other frequency points of the first frequency band are all detecting subcarriers; the distribution functions of the labeled subcarriers in the second frequency band are 10n+1 and 10n+5, and other frequency points of the second frequency band are detecting subcarriers.
  • the network side device modulates a downlink pilot sequence to the first stage in an initialization phase
  • the sounding subcarriers on the first and second frequency bands and the labeled subcarriers are modulated; and in the Showtime phase, the downlink pilot sequences are modulated onto the sounding subcarriers on the first and second frequency bands.
  • the symmetry point is fixedly set in the device, or is determined by interactive negotiation with the peer device in a handshake phase or an initialization phase.
  • the method further includes the network side device performing precoding processing on the signal to be transmitted according to the signal fed back by the peer device.
  • the frequency band of the overlapping part is taken as a part of the frequency band, and the frequency band of the non-overlapping part is used as another part of the frequency band, and the allocation part is used in the two parts of the frequency band.
  • the carrier including the labeled subcarrier and the detected subcarrier, and ensures that the subcarriers in the two frequency bands are symmetrically distributed based on a certain symmetric point, so that subcarriers in the non-overlapping frequency band can be ensured even if aliasing or overlapping frequency bands occur
  • the subcarriers can be aligned with the original subcarrier position even after mirroring. And because of the above subcarrier alignment, the crosstalk channel can be normally estimated for crosstalk cancellation.
  • VDSL2 17a and VDSL2 35b The following describes the coexistence scenario of VDSL2 17a and VDSL2 35b as an example.
  • the VDSL2 35b line will crosstalk to the VDSL2 17a line. Since the spectrum above 17.665Mhz of VDSL2 35b will crosstalk and alias to the spectrum below 17.664Mhz of VDSL2 17a, after using this scheme, the overlapping spectrum is guaranteed to 0-17664Mhz and does not overlap.
  • the subcarriers in the spectrum of 17.665Mhz-35.328MHz are symmetric, which ensures the position of the detected subcarriers and labeled subcarriers after aliasing and the original of 17.64MHz below VDSL2 17a.
  • the positions of the probe subcarriers and the labeled subcarriers are always aligned; the crosstalk channel can be normally estimated for crosstalk cancellation.
  • the VDSL2 17a line will also crosstalk to the VDSL2 35b line.
  • the embodiment of the invention provides a signal processing method, as shown in FIG. 4, including
  • Step 401 The user side device divides the frequency band used for transmitting the uplink synchronization symbol into at least two frequency bands that do not overlap, where the two frequency bands are the first frequency band and the second frequency band; the lowest frequency point of the second frequency band is higher than The highest frequency point of the first frequency band.
  • the frequency band used by the user equipment to send the uplink synchronization symbol is 0-35.328 MHz, and the 0-35.328 MHz may be divided into two frequency bands.
  • the highest frequency point of the first frequency band is not higher than 17.664 MHz; the lowest frequency point of the second frequency band is higher than two of the highest frequency points of the first frequency band.
  • the frequency point is the center frequency value of the frequency band in which the subcarrier or subchannel is located.
  • the frequency band used by the user equipment to send the uplink synchronization symbol may be a combination of frequency bands used for transmitting the uplink synchronization symbol in the DSL mode of two different spectrums, for example, the network device can simultaneously support VDSL2 (for example, VDSL2 17a) And the next-generation VDSL (such as VDSL2 35b), the two bands supported by the two systems for transmitting uplink synchronization symbols, the frequency band used for transmitting uplink synchronization symbols in VDSL2 17a mode is 0-176.64 MHz, and the next In the first generation VDSL mode, the frequency band for transmitting the uplink synchronization symbol is at least 0-35.328 MHz.
  • VDSL2 for example, VDSL2 17a
  • VDSL2 35b next-generation VDSL
  • the frequency band collection of the two modes for transmitting the uplink synchronization symbol is 0-35.328 MHz, and the overlapping frequency band is 0-176.64 MHz.
  • the highest frequency point of the first frequency band is not higher than the highest frequency point of the overlapping frequency band for transmitting the uplink synchronization symbol in the DSL mode of the two different spectrums.
  • the sounding subcarriers on the second frequency band and the sounding subcarriers on the first frequency band are different from each other.
  • Step 403 Allocating frequency points on the first frequency band and the second frequency band to the sounding subcarriers and the labeled subcarriers, so that the sounding subcarriers and the labeled subcarriers distributed on the second frequency band are respectively distributed on the first frequency band.
  • the sounding subcarrier and the labeled subcarrier are symmetric based on a symmetric point; the symmetric point is a lowest frequency point of the second frequency band, a highest frequency point of the first frequency band, or a lowest frequency point of the second frequency band A frequency point between the highest frequency point of the first frequency band.
  • Step 405 The user side device modulates the uplink pilot sequence to the sounding subcarriers on the first frequency band and the second frequency band, and then sends the uplink pilot sequence to the peer device.
  • the user side device modulates an uplink pilot sequence to the sounding subcarriers and the labeled subcarriers on the first frequency band and the second frequency band in an initialization phase; and modulates the uplink pilot sequence to the On the probe subcarriers on the first frequency band and the second frequency band.
  • the symmetry point is fixedly set in the device, or is determined after the peer device negotiates through interaction in the Handshake or initialization phase.
  • the overlapping frequency band is used as a part of the frequency band, and the non-overlapping frequency band is used as another partial frequency band, and the subcarriers are allocated on the two partial frequency bands ( Including the labeled subcarriers and the detecting subcarriers, and ensuring that the subcarriers in the two frequency bands are symmetrically distributed based on a certain symmetric point, so that the subcarriers in the non-overlapping frequency bands can be ensured even if subcarriers in the overlapping or overlapping frequency bands occur It can be aligned with the original subcarrier position even after mirroring. Just because the probe subcarrier and the labeled subcarrier are respectively aligned, the crosstalk channel can be normally estimated for crosstalk cancellation.
  • the embodiment of the present invention further provides a network side device 500.
  • the network side device 500 includes a spectrum dividing module 501 and a signal sending module 503.
  • the spectrum dividing module 501 divides a frequency band used for transmitting a downlink synchronization symbol into at least two frequency bands that do not overlap, wherein the two frequency bands are a first frequency band and a second frequency band; and the lowest frequency point of the second frequency band is higher than The highest frequency point of the first frequency band;
  • the subcarrier and the labeled subcarrier are symmetric based on a symmetry point; the symmetry point is the second a frequency point between a lowest frequency point of the frequency band, a highest frequency point of the first frequency band, or a lowest frequency point of the second frequency band and a highest frequency point of the first frequency band.
  • the signal sending module 503 is configured to: the network side device modulates the downlink pilot sequence to the detecting subcarriers on the first frequency band and the second frequency band, and then sends the downlink pilot sequence to the peer device.
  • the frequency band used by the network device to send the downlink synchronization symbol may be a combination of frequency bands used for transmitting the downlink synchronization symbol in the DSL mode of two different spectrums; the highest frequency point of the first frequency band is not higher than The highest frequency point of the overlapping frequency band in which the downlink synchronization symbol is transmitted in the DSL mode of two different spectrums.
  • the network side device 500 further includes a signal receiving module 505 (not shown) for receiving a signal fed back by the peer device, and the signal fed back by the peer device reflects the peer device.
  • the spectrum division module 501 specifically includes the frequency points on the first frequency band and the second frequency band to the sounding subcarriers and the labeled subcarriers, and the spectrum dividing module 501 performs the frequency on the first frequency band according to the comb structure. Points are alternately allocated to the probe subcarriers and the labeled subcarriers, and the frequency points on the second frequency band are alternately allocated to the probe subcarriers and the labeled subcarriers.
  • the signal sending module 503 modulates the downlink pilot sequence to the sounding subcarriers and the labeled subcarriers on the first frequency band and the second frequency band in an initialization phase; and modulates the downlink pilot sequence to the On the probe subcarriers on the first and second bands.
  • the network side device 500 is a DSLAM device
  • the spectrum dividing module 501 is a processing chip in the DSLAM device
  • the signal sending module 503 is a signal transmitter in the DSLAM.
  • the signal receiving module 505 is a signal receiver in the DSLAM.
  • the embodiment of the present invention further provides a user side device 600.
  • the user side device is 600 includes a spectrum division module 601 and a signal transmission module 603;
  • the spectrum division module 601 is configured to divide the frequency band used for transmitting the uplink synchronization symbol into at least two frequency bands that are not overlapped, where the two frequency bands are the first frequency band and the second frequency band; and the second frequency band is the lowest The frequency point is higher than the highest frequency point of the first frequency band;
  • the subcarrier and the labeled subcarrier are based on a symmetric point symmetry; the symmetry point is a lowest frequency point of the second frequency band, a highest frequency point of the first frequency band or a lowest frequency point of the second frequency band, and the A frequency point between the highest frequency points of the first frequency band.
  • the signal sending module 603 is configured to modulate the uplink pilot sequence to the detecting subcarriers on the first frequency band and the second frequency band, and then send the uplink pilot sequence to the peer device.
  • the frequency band used by the user equipment to send the uplink synchronization symbol may be a combination of frequency bands used for transmitting the uplink synchronization symbol in the DSL mode of two different spectrums, and the highest frequency point of the first frequency band is not higher than The DSL mode of the two different spectrums transmits the highest frequency point of the overlapping frequency band of the uplink synchronization symbol.
  • the signal sending module 603 modulates an uplink pilot sequence to the sounding subcarriers and the labeled subcarriers on the first frequency band and the second frequency band in an initialization phase; and modulates the uplink pilot sequence to the Showtime phase to On the detected subcarriers on the first frequency band and the second frequency band.
  • the user side device 600 is a CPE
  • the spectrum dividing module 601 is a processing chip in the CPE
  • the signal sending module 603 is a signal transmitter in the CPE.
  • the embodiment of the present invention further provides a network system 700 including a network side device 701 and a user side device 703. As shown in FIG. 7, the network side device 701 and the user side device 703 pass the twisted pair 705. connection.
  • the network side device 701 is the network side device 500 in the above embodiment
  • the user side device 703 is the user side device 600 in the above embodiment.
  • FIG. 8 schematically illustrates an electrical universal network component 800 suitable for implementing one or more embodiments of the components disclosed herein.
  • the network component 800 includes a processor 802 (which may be referred to as a central processing unit or CPU) that includes a second memory 804, a read only memory (ROM) 806, a random access memory (RAM) 808, input/ The output (I/O) device 810 and the network connectivity device 812 communicate with the memory device.
  • the processor 802 can be implemented as one or more CPU chips or as part of one or more application specific integrated circuits.
  • the second memory 804 is typically comprised of one or more disk drives or disk drives and is used for non-volatile storage of data and as an overflow data storage device if the RAM 808 is not sufficient to accommodate all of the operational data.
  • the second memory 804 can be used to store programs that are loaded into the RAM 808 when selected for execution.
  • ROM 806 is used to store instructions and data that is read during program execution.
  • ROM 806 is a non-volatile memory device that typically has a smaller memory capacity relative to the larger memory capacity of second memory 804.
  • RAM 808 is used to store volatile data and may store instructions. Access to ROM 806 and RAM 808 is typically faster than access to second memory 804.

Abstract

L'invention concerne un procédé de traitement de signal comprenant les étapes consistant à : diviser une bande de fréquences pour envoyer un symbole de synchronisation de liaison descendante dans au moins deux parties de bandes de fréquences non chevauchantes qui sont une première bande de fréquences et une seconde bande de fréquences ; attribuer des points de fréquence sur la première bande de fréquences et la seconde bande de fréquences à une sous-porteuse de sondage et une sous-porteuse de balisage de sorte que la sous-porteuse de sondage et la sous-porteuse de balisage distribuées sur la seconde bande de fréquences soient respectivement symétriques à la sous-porteuse de sondage et la sous-porteuse de balisage distribuées sur la première bande de fréquences, en se basant sur un point de symétrie qui est le point de fréquence le plus bas de la seconde bande de fréquences, le point de fréquence le plus haut de la première bande de fréquences ou un point de fréquence entre le point de fréquence le plus bas de la seconde bande de fréquences et le point de fréquence le plus haut de la première bande de fréquences ; et moduler une séquence de fréquences pilote de liaison descendante sur la sous-porteuse de sondage sur la première bande de fréquences et la seconde bande de fréquences, et l'envoyer à un dispositif d'extrémité opposée. L'invention concerne également un appareil de traitement de signal et un système de réseau.
PCT/CN2015/081071 2015-06-09 2015-06-09 Procédé et appareil de traitement de signal, et système WO2016197324A1 (fr)

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CN115883049B (zh) * 2022-11-30 2023-07-18 深圳市云天数字能源有限公司 信号同步方法及装置

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