WO2014094265A1 - Procédé de transmission de signal, procédé de démodulation, dispositif, appareil de réseau et équipement d'utilisateur - Google Patents

Procédé de transmission de signal, procédé de démodulation, dispositif, appareil de réseau et équipement d'utilisateur Download PDF

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Publication number
WO2014094265A1
WO2014094265A1 PCT/CN2012/086991 CN2012086991W WO2014094265A1 WO 2014094265 A1 WO2014094265 A1 WO 2014094265A1 CN 2012086991 W CN2012086991 W CN 2012086991W WO 2014094265 A1 WO2014094265 A1 WO 2014094265A1
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WO
WIPO (PCT)
Prior art keywords
dmrs pattern
dmrs
downlink subframe
user equipment
indication information
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Application number
PCT/CN2012/086991
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English (en)
Chinese (zh)
Inventor
张宁波
南方
余政
程型清
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.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280068392.4A priority Critical patent/CN104081849B/zh
Priority to PCT/CN2012/086991 priority patent/WO2014094265A1/fr
Publication of WO2014094265A1 publication Critical patent/WO2014094265A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • Signal transmission method demodulation method, device, network device, and user equipment
  • the present invention relates to the field of communications technologies, and in particular, to a method, a demodulation method, a device, a network device, and a user equipment for transmitting a demodulation reference signal.
  • a Demodulation Reference Signal (DMRS) is mainly used for channel estimation.
  • LTE Long Term Evolution
  • TDD Time Division Duplex
  • the receiving end ie, the terminal of the half-duplex frequency division duplex (HD-FDD)
  • problems such as switching time and timing advance when the downlink subframe is switched to the uplink subframe.
  • a guard interval is required, which is similar to the guard interval (GP, Guard Period) time of the special subframe in the TDD system.
  • the receiver does not receive the downlink channel information.
  • the guard interval of the downlink subframe switching to the uplink subframe is T OFDM symbols, and at least one DMRS according to the DMRS pattern that can be used by the current FDD system.
  • the symbol falls within the time of T OFDM symbols, and according to the protocol, the receiving end will not be able to receive the DMRS in the time of T OFDM symbols, which will affect the channel estimation performance of the HD-FDD receiving end.
  • the guard interval is required when the downlink subframe is converted to the uplink subframe, but the receiver does not receive any downlink channel information during the guard interval.
  • some reference signals may fall within the guard time, which may result in the receiver not receiving the reference signal, which reduces the accuracy of the channel estimation and thus affects the channel estimation performance. Summary of the invention
  • a method for transmitting a demodulation reference signal, a demodulation method, a device, a network device, and a user equipment are provided to solve a system channel that cannot be received in a guard interval interval in an HD-FDD system. Estimate technical problems with reduced performance.
  • a method for transmitting a demodulation reference signal is provided, which is applied to a half-duplex frequency division duplex HD-FDD system, the method comprising: determining a first demodulation reference signal DMRS pattern for a first downlink subframe And determining, by the second downlink subframe, a second DMRS pattern, where the first DMRS pattern is: the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval time;
  • the row subframe is a set of the downlink subframe n-1, and the next subframe n of the downlink subframe n-1 is the uplink subframe n, n is a positive integer, and the second downlink subframe is a downlink subframe other than the first downlink subframe, where the guard interval is when the user equipment receives data on the first downlink subframe n-1, and sends data on the uplink subframe n.
  • the first DMRS pattern is further configured to: the last OFDM symbol corresponding to the time domain and the frequency domain resource corresponding to the first DMRS pattern, being the first The last received orthogonal frequency division multiplexed OFDM symbol of the subframe; or
  • the determining, by the first downlink sub-frame, the first demodulation reference signal DMRS pattern includes:
  • the first DMRS pattern is determined from a DMRS pattern that can be used in a special sub-frame of a time division duplex TDD system.
  • the determining, by the first downlink sub-frame, the first demodulation reference signal DMRS pattern includes:
  • the method further includes:
  • the DMRS pattern indication information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern and the second Indication information of the DMRS pattern.
  • the sending the DMRS pattern indication information to the user equipment includes: transmitting the DMRS pattern indication information to the user equipment by broadcasting; or
  • the second DMRS pattern is FDD The DMRS pattern that the system can use.
  • the second aspect provides a method for transmitting a demodulation reference signal, which is applied to a half-duplex frequency division duplex HD-FDD system, and the method includes:
  • the first downlink subframe is a set of downlink subframes n-1, and the downlink subframe n
  • the next subframe n of -1 is the uplink subframe n
  • n is a positive integer
  • the second downlink subframe is a downlink subframe other than the first downlink subframe
  • the DMRS Transmitting, by the DMRS, the DMRS to the user equipment on the time domain and the frequency domain resource corresponding to the third DMRS pattern, where the guard interval of the user equipment is sent when the DMRS is sent in the first downlink subframe
  • the DMRS is not sent on the time domain and the frequency domain resource corresponding to the time, where the protection interval is when the user equipment receives data on the first downlink subframe n-1, and in the uplink subframe n
  • the sending the DMRS to the user equipment on the time domain and the frequency domain resource corresponding to the third DMRS pattern includes:
  • the DMRS is a DMRS that is spread by a spreading code sequence of length 3.
  • the method further includes: sending the DMRS pattern indication information to the user equipment, where the DMRS pattern indication information includes: The indication information of the third DMRS pattern.
  • the sending the DMRS pattern indication information to the user equipment includes:
  • the channel is notified to the user equipment.
  • the third DMRS pattern is applicable to the FDD system DMRS pattern.
  • a third aspect provides a signal demodulation method, the method being applied to a half-duplex frequency division duplex HD-FDD system, the method comprising:
  • the first DMRS pattern is: the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval time;
  • the first downlink subframe is a set of the downlink subframe n-1
  • the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer
  • the second downlink subframe is a downlink subframe other than the first downlink subframe.
  • the guard interval is when the user equipment receives data on the first downlink subframe n-1 and transmits data on the uplink subframe n, the first downlink subframe n- 1 time overlapping with the uplink subframe n;
  • the second DMRS received on the domain resource demodulates the other downlink subframes.
  • the first DMRS pattern is further configured to: the last OFDM symbol corresponding to the time domain and the frequency domain resource corresponding to the first DMRS pattern, being the first The last received orthogonal frequency division multiplexed OFDM symbol of the subframe; or
  • the time domain and the frequency domain resources corresponding to the first DMRS pattern and the second DMRS pattern are pre-agreed.
  • the first DMRS is received on the time domain and the frequency domain resource corresponding to the first DMRS pattern of the first downlink subframe; and the time domain and the frequency domain corresponding to the second DMRS pattern of the second downlink subframe Before receiving the second DMRS on the resource, it also includes:
  • the DMRS pattern indication information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern and indication information of the second DMRS pattern.
  • the receiving, by the receiving network device, the DMRS pattern indication information includes:
  • the receiving network device transmits the indication information of the determined DMRS pattern through the physical downlink control channel.
  • the second DMRS pattern is applicable to the FDD system DMRS pattern.
  • a fourth aspect provides a signal demodulation method, the method being applied to a half-duplex frequency division duplex HD-FDD system, the method comprising:
  • a DMRS on a time domain and a frequency domain resource corresponding to a third DMRS pattern of the first downlink subframe and the second downlink subframe where, when the DMRS is received on the first downlink subframe, The DMRS is not received on the time domain and the frequency domain resource corresponding to the protection interval of the user equipment, where the first downlink subframe is a set of downlink subframes n1, and the downlink subframe n-1 is The next subframe n is the uplink subframe n, n is a positive integer, the second downlink subframe is a downlink subframe other than the first downlink subframe, and the guard interval time is when the user equipment When the data is received on the first downlink subframe n1, and the data is transmitted on the uplink subframe n, the time when the first downlink subframe n1 overlaps with the uplink subframe n;
  • the receiving the DMRS on the time domain and the frequency domain resource corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe includes:
  • the DMRS is a DMRS that is spread by a spreading code sequence whose length is less than 4.
  • the DMRS is a DMRS that is spread by a spreading code sequence of length 3.
  • the method further includes:
  • the receiving network device sends an indication of the DMRS pattern determined by the user equipment Information, including:
  • the receiving network device transmits the indication information of the determined DMRS pattern through the physical downlink control channel.
  • the third DMRS pattern is applicable to the FDD system DMRS pattern.
  • the fifth aspect provides a transmitting apparatus for demodulating a reference signal, which is applied to a half-duplex frequency division duplex HD-FDD system, and the apparatus includes:
  • a determining unit configured to determine a first demodulation reference signal DMRS pattern for the first downlink subframe, and determine a second DMRS pattern for the second downlink subframe, where the first DMRS pattern satisfies: the first DMRS
  • the time domain and the frequency domain resource corresponding to the pattern are not in the guard interval;
  • the first downlink subframe is a set of the downlink subframe n1, and the next subframe n of the downlink subframe n-1 is an uplink subframe.
  • the frame n and n are positive integers, and the second downlink subframe is a downlink subframe other than the first downlink subframe, where the guard interval time is when the user equipment is in the first downlink subframe.
  • a first sending unit configured to send the first DMRS to the user equipment on the time domain and the frequency domain resource corresponding to the first DMRS pattern, and on the time domain and the frequency domain resource corresponding to the second DMRS pattern Sending a second DMRS to the user equipment.
  • the first DMRS pattern determined by the determining unit further satisfies: a last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located, Determining the last received orthogonal frequency division multiplexing OFDM symbol of the first downlink subframe; or The last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located, before the last OFDM symbol received by the first downlink subframe, and as close as possible to the first downlink sub The last OFDM symbol received by the frame.
  • the determining unit is specifically configured to determine, by using the following manner, a first demodulation reference signal for the first downlink subframe DMRS pattern:
  • the first DMRS pattern is determined from a DMRS pattern that can be used in a special sub-frame of a time division duplex TDD system.
  • the determining unit is specifically configured to determine, by using the following manner, a first demodulation reference signal DMRS pattern for the first downlink subframe:
  • the method further includes:
  • a second sending unit configured to: after the determining unit determines a first demodulation reference signal DMRS pattern for the first downlink subframe, and after determining the second DMRS pattern for the second downlink subframe, send the DMRS pattern indication information to And the user equipment, the DMRS pattern indication information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern and indication information of the second DMRS pattern.
  • the second sending unit sends the DMRS pattern indication information For user equipment, including:
  • the determined unit determines the second DMRS
  • the pattern is a DMRS pattern that can be used by the FDD system.
  • a sixth aspect provides a transmitting apparatus for demodulating a reference signal, which is applied to a half-duplex frequency division duplex HD-FDD system, the apparatus comprising: a determining unit, configured to determine a third demodulation reference signal DMRS pattern for the first downlink subframe and the second downlink subframe, where the first downlink subframe is a set of downlink subframes n-1, and The next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer, and the second downlink subframe is a downlink subframe other than the first downlink subframe;
  • a first sending unit configured to send a DMRS to the user equipment on a time domain and a frequency domain resource corresponding to the third DMRS pattern, where, when the DMRS is sent on the first downlink subframe, The DMRS is not sent on the time domain and the frequency domain resource corresponding to the guard interval of the user equipment; the guard interval time is when the user equipment receives data on the first downlink subframe n-1, and a time when the first downlink subframe n-1 overlaps with the uplink subframe n when data is transmitted on the uplink subframe n.
  • the first sending unit is configured to send the DMRS to a user on a time domain and a frequency domain resource corresponding to a DMRS in the third DMRS pattern, as follows: Equipment:
  • the DMRS is a DMRS that is spread by a spreading code sequence whose length is less than 4.
  • the method further includes:
  • a second sending unit configured to: after the determining unit determines the third DMRS pattern for the first downlink subframe and the second downlink subframe, send the DMRS pattern indication information to the user equipment, where the DMRS pattern indication information includes: The indication information of the third DMRS pattern is described.
  • the sending by the second sending unit, the DMRS pattern indication information to the user equipment,
  • the channel is notified to the user equipment.
  • the third DMRS pattern determined by the determining unit A DMRS pattern that can be used for FDD systems.
  • a seventh aspect provides a signal demodulating apparatus for a half-duplex frequency division duplex HD-FDD system, the apparatus comprising: The first receiving unit receives the first DMRS on the time domain and the frequency domain resource corresponding to the first DMRS pattern of the first downlink subframe; and the time domain and the frequency domain corresponding to the second DMRS pattern of the second downlink subframe Receiving, by the resource, the second DMRS, where the first DMRS pattern is: the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval; the first downlink subframe is a downlink subframe.
  • the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer, and the second downlink subframe is other than the first downlink subframe.
  • the downlink subframe, the guard interval is when the user equipment receives data on the first downlink subframe n-1, and when the data is sent on the uplink subframe n, the first downlink a time when the row subframe n-1 overlaps with the uplink subframe n;
  • a demodulation unit configured to demodulate the first downlink subframe by using a DMRS on a time domain and a frequency domain resource corresponding to the first DMRS pattern, and using a time domain sum corresponding to the second DMRS pattern
  • the DMRS on the frequency domain resource demodulates the other downlink subframes.
  • the first DMRS pattern received by the first receiving unit further satisfies:
  • the last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located is the last received orthogonal frequency division multiplexing OFDM symbol of the first downlink subframe;
  • the method further includes:
  • a second receiving unit configured to receive, by the first receiving unit, a first DMRS from a time domain and a frequency domain resource corresponding to a first DMRS pattern of the first downlink subframe; and a second from the second downlink subframe Before receiving the second DMRS in the time domain and the frequency domain resource corresponding to the DMRS pattern, receiving, by the network device, indication information of the DMRS pattern that is determined by the user equipment, where the indication information of the DMRS pattern includes: the indication of the first DMRS pattern Information; or indication information of the first DMRS pattern and indication information of the second DMRS pattern.
  • the second receiving unit is configured to receive, by using a network device, a user equipment Deterministic information of the determined DMRS pattern:
  • the receiving network device transmits the indication information of the determined DMRS pattern through the physical downlink control channel.
  • the eighth aspect provides a signal demodulating apparatus for a half-duplex frequency division duplex HD-FDD system, the apparatus comprising:
  • a first receiving unit configured to receive, on a time domain and a frequency domain resource corresponding to a third DMRS pattern of the first downlink subframe and the second downlink subframe, where the DMRS is received on the first downlink subframe
  • the DMRS is not received by the time domain and the frequency domain resource corresponding to the guard interval of the user equipment, where the first downlink subframe is a set of downlink subframes n-1, and
  • the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer, and the second downlink subframe is a downlink subframe other than the first downlink subframe.
  • the protection interval is when the user equipment receives data on the first downlink subframe n-1 and transmits data on the uplink subframe n, the first downlink subframe n-1 and The time when the uplink subframe n overlaps; the demodulation unit is configured to demodulate the first downlink subframe and the second downlink subframe by using the DMRS.
  • the first receiving unit is specifically configured to: time domain and frequency corresponding to a third DMRS pattern of the first downlink subframe and the second downlink subframe in the following manner Receive DMRS on the domain resource:
  • the DMRS is a DMRS that is spread by a spreading code sequence whose length is less than 4.
  • the method further includes:
  • the indication information of the DMRS pattern determined by the user equipment, the indication information of the DMRS pattern includes: indication information of the third DMRS pattern.
  • the second receiving unit is configured to receive, by using a network device, a user equipment Deterministic information of the determined DMRS pattern:
  • the ninth aspect provides a network device, which is applied to a half-duplex frequency division duplex HD-FDD system, and includes: a processor, configured to determine a first demodulation reference signal DMRS pattern for the first downlink subframe, and The second downlink subframe determines the second DMRS pattern, where the first DMRS pattern is: the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval time; the first downlink subframe is a set of the downlink subframe n-1, and the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer, and the second downlink subframe is the first downlink a downlink subframe other than the subframe, where the guard interval time is when the user equipment receives data on the first downlink subframe n-1, and when the data is sent on the uplink subframe n, a time when the first downlink subframe n-1 overlaps with the uplink subframe n;
  • a wireless transceiver configured to send the first DMRS to the user equipment on the time domain and the frequency domain resource corresponding to the first DMRS pattern determined by the processor, and in a time domain corresponding to the second DMRS pattern And transmitting, on the frequency domain resource, a second DMRS to the user equipment.
  • the determining, by the processor, the first DMRS pattern for the first downlink subframe further satisfies: the time domain and the frequency domain resource corresponding to the first DMRS pattern are located. a last OFDM symbol, which is the last received orthogonal frequency division multiplexing OFDM symbol of the first downlink subframe; or
  • the determining, by the processor, the first DMRS pattern for the first downlink subframe including: time division duplex TDD
  • the first DMRS pattern is determined in a DMRS pattern that can be used by a special subframe of the system.
  • the determining, by the processor, the first DMRS pattern for the first downlink subframe includes:
  • the candidate DMRS pattern set includes at least one DMRS pattern, and the time domain and frequency corresponding to the at least one DMRS pattern The domain resource is not in the guard interval.
  • the wireless transceiver is further configured to send DMRS pattern indication information to the user equipment, where the DMRS
  • the pattern indication information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern and indication information of the second DMRS pattern.
  • the wireless transceiver is specifically used to The DMRS pattern indication information is sent to the user equipment:
  • the determining unit is the second downlink Subframe determination second
  • the DMRS pattern is a DMRS pattern that can be used by the FDD system.
  • the tenth aspect provides a network device, which is applied to a half-duplex frequency division duplex HD-FDD system, and includes: a processor, configured to determine a third demodulation reference signal for the first downlink subframe and the second downlink subframe DMRS pattern;
  • a wireless transceiver configured to send a DMRS to the user equipment on a time domain and a frequency domain resource corresponding to the third DMRS pattern that is determined by the processor, where the user equipment is sent on the first downlink subframe
  • the DMRS is not sent on the time domain and the frequency domain resource corresponding to the guard interval of the user equipment, where the first downlink subframe is a set of downlink subframes n-1, and The next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer, and the second downlink subframe is a downlink subframe other than the first downlink subframe
  • the guard interval is when the user equipment receives data on the first downlink subframe n-1 and transmits data on the uplink subframe n, the first downlink subframe n-1 and the The time at which the uplink subframe n overlaps is described.
  • the wireless transceiver is configured to send the DMRS to the user equipment on a time domain and a frequency domain resource corresponding to the third DMRS pattern according to the following manner:
  • the wireless transceiver is further configured to send the DMRS pattern indication information to the user equipment, where the DMRS pattern indication information includes: indication information of the third DMRS pattern.
  • the wireless transceiver is further configured to send the DMRS pattern indication information to the user equipment according to the following manner :
  • the channel is notified to the user equipment.
  • the third DMRS pattern determined by the determining unit is usable by the FDD system DMRS pattern.
  • the eleventh aspect provides a user equipment, which is applied to a half-duplex frequency division duplex HD-FDD system, and includes: a transceiver, configured to be in a time domain and a frequency domain corresponding to a first DMRS pattern of the first downlink subframe Receiving the first DMRS on the resource; and receiving the second DMRS on the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe; wherein, the first DMRS pattern satisfies: the first DMRS pattern The corresponding time domain and frequency domain resources are not in the guard interval; the first downlink subframe is a set of downlink subframes n-1, and the next subframe n of the downlink subframe n-1 is an uplink subframe.
  • the frame n and n are positive integers, and the second downlink subframe is a downlink subframe other than the first downlink subframe, where the guard interval time is when the user equipment is in the first downlink subframe.
  • a processor configured to demodulate the first downlink subframe by using a DMRS received by the transceiver on a time domain and a frequency domain resource corresponding to the first DMRS pattern, and using the second DMRS pattern
  • the DMRS received on the corresponding time domain and frequency domain resources demodulates the other downlink subframes.
  • the wireless transceiver is further configured to:
  • the DMRS pattern indication information is sent to the user equipment, and the DMRS pattern indication information includes: indication information of the third DMRS pattern.
  • the wireless transceiver is further configured to send the DMRS pattern indication information to the user equipment according to the following manner:
  • the DMRS pattern indication information is sent to the user equipment by means of a broadcast; or the DMRS pattern indication information is sent to the user equipment by using radio resource control RRC signaling; or And notifying the DMRS pattern indication information to the user equipment by using a downlink physical control channel.
  • the third DMRS pattern determined by the determining unit is a DMRS pattern that can be used by the FDD system. .
  • a twelfth aspect provides a user equipment, which is applied to a half-duplex frequency division duplex HD-FDD system, including: a transceiver, configured to perform time domain and frequency domain corresponding to a first DMRS pattern of a first downlink subframe Receiving the first DMRS on the resource; and receiving the second DMRS on the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe; wherein, the first DMRS pattern satisfies: the first DMRS pattern The corresponding time domain and frequency domain resources are not in the guard interval; the first downlink subframe is a set of downlink subframes n-1, and the next subframe n of the downlink subframe n-1 is an uplink subframe.
  • the frame n and n are positive integers, and the second downlink subframe is a downlink subframe other than the first downlink subframe, where the guard interval time is when the user equipment is in the first downlink subframe.
  • a processor configured to demodulate the first downlink subframe by using a DMRS received by the transceiver on a time domain and a frequency domain resource corresponding to the first DMRS pattern, and using the second DMRS pattern
  • the DMRS received on the corresponding time domain and frequency domain resources demodulates the other downlink subframes.
  • the first DMRS pattern received by the transceiver further satisfies:
  • the last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located is the last received orthogonal frequency division multiplexing OFDM symbol of the first downlink subframe;
  • the transceiver is in a time domain and frequency corresponding to the first DMRS pattern of the first downlink subframe Receiving the first DMRS on the domain resource; and before receiving the second DMRS on the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe,
  • the DMRS pattern indication information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern and indication information of the second DMRS pattern.
  • the transceiver is specifically configured to receive the DMRS pattern indication information sent by the network device according to the following manner:
  • a DMRS pattern is configured for the first downlink subframe and the second downlink subframe of the user equipment, and the DMRS is sent to the user equipment on the time domain and the frequency domain resource corresponding to the DMRS pattern, or
  • the guard interval time of the user equipment is corresponding.
  • the DMRS is not sent on the time domain and frequency domain resources.
  • FIG. 1 is a flowchart of a method for transmitting a demodulation reference signal according to an embodiment of the present invention
  • FIG. 2 is another flowchart of a method for transmitting a demodulation reference signal according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of a device for transmitting a demodulation reference signal according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a signal demodulation device according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • FIG. 9A is a schematic diagram of a DMRS pattern used by a first downlink subframe in a resource block according to an embodiment of the present disclosure
  • FIG. 9B is another schematic diagram of a DMRS pattern used by a first downlink subframe in a resource block according to an embodiment of the present disclosure.
  • 10A is a schematic diagram of a DMRS pattern of a second downlink subframe in a resource block according to an embodiment of the present invention
  • FIG. 10B is another schematic diagram of a DMRS pattern of a second downlink subframe in a resource block according to an embodiment of the present disclosure
  • 11A is a schematic diagram of a DMRS pattern of a first downlink subframe in a resource block according to an embodiment of the present invention
  • FIG. 11B is another schematic diagram of a DMRS pattern used in a first downlink subframe in a resource block according to an embodiment of the present disclosure
  • 12A is a schematic diagram of an alternative DMRS pattern set of a first downlink subframe in a resource block according to an embodiment of the present invention
  • FIG. 12B is another schematic diagram of an alternative DMRS pattern set of a first downlink subframe in a resource block according to an embodiment of the present invention.
  • FIG. 13A is a schematic diagram of a DMRS pattern of a first downlink subframe of a first downlink subframe of an HD-FDD in a PRB according to an embodiment of the present disclosure
  • FIG. 13B is another schematic diagram of a DMRS pattern of a first downlink subframe of an HD-FDD in one PRB according to an embodiment of the present disclosure
  • 14A is a schematic diagram of a DMRS pattern of a first downlink subframe in an extended CP state of an HD-FDD system according to an embodiment of the present disclosure
  • 14B is a second downlink subframe in the case of an extended CP in an HD-FDD system according to an embodiment of the present invention
  • FIG. 15 is a schematic diagram of a first downlink subframe in a case where an HD-FDD system extends an CP according to an embodiment of the present disclosure
  • FIG. 16 is another schematic diagram of a DMRS pattern of a first downlink subframe in a case where an HD-FDD system extends an CP according to an embodiment of the present invention.
  • the guard interval is required to convert the downlink subframe to the uplink subframe, and the receiver does not receive the guard interval. Any downstream channel information.
  • DMRS demodulation reference signal
  • some demodulation reference signals transmitted by the network device may fall within the protection time, resulting in The receiving end cannot receive, which reduces the accuracy of channel estimation and affects system performance. Therefore, the embodiment of the present invention is directed to the technical problem that the HD-FDD system cannot receive the reference signal during the guard interval, which causes the system performance to be degraded, and proposes a first downlink subframe before the uplink subframe and the first downlink subframe.
  • FIG. 1 is a flowchart of a method for transmitting a demodulation reference signal according to an embodiment of the present invention, where the method is applied to a half-duplex frequency division duplex (HD-FDD).
  • the method includes: Step 101: Determine a first DMRS pattern for the first downlink subframe, and determine a second for the second downlink subframe
  • the first DMRS pattern is: the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval time;
  • the first downlink subframe is the downlink subframe n-1
  • the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer, and the second downlink subframe is a downlink sub-frame other than the first downlink subframe.
  • the guard interval is when the user equipment receives data on the first downlink subframe n-1, and when the data is sent on the uplink subframe n, the first downlink subframe n -1 a time overlapped with the uplink subframe n;
  • the first demodulation reference signal DMRS pattern is determined for the first downlink subframe. This embodiment is exemplified by two modes, but is not limited thereto:
  • One way of determining is to determine the first DMRS pattern from a DMRS pattern usable by a special subframe of the TDD system.
  • a network device may select or appoint a DMRS pattern from a DMRS pattern usable by a TDD system special subframe, and define the selected or agreed DMRS pattern as the first DMRS pattern. And wherein the selecting or about one DMRS pattern needs to satisfy that the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval time.
  • Another determining manner is: determining the first from the candidate DMRS pattern set of the first downlink subframe
  • the candidate DMRS pattern set includes at least one DMRS pattern, and the time domain and frequency domain resources corresponding to the at least one DMRS pattern are not within the guard interval time.
  • the network device selects an candidate DMRS pattern from the candidate DMRS pattern set of the first downlink subframe before the uplink subframe, and defines the selected candidate DMRS pattern as The first DMRS pattern; wherein, the candidate DMRS pattern of the first downlink subframe before the uplink subframe The set includes at least one DMRS pattern, and the corresponding time domain and frequency domain resources are not in the guard interval time; wherein the selecting the candidate DMRS pattern must satisfy: the time domain and the frequency domain resource corresponding to the DMRS are not in the protection Interval.
  • the first DMRS pattern may further satisfy: a last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located, and the last one of the first downlink subframes is received. Orthogonal frequency division multiplexing OFDM symbol; or the last OFDM symbol in which the first DMRS pattern corresponds to the time domain and the frequency domain resource, and the last OFDM symbol received in the first downlink subframe Previously, and as close as possible to the last OFDM symbol received by the first downlink subframe.
  • Step 102 Send a first DMRS to the user equipment on the time domain and the frequency domain resource corresponding to the first DMRS pattern, and send a second on the time domain and the frequency domain resource corresponding to the second DMRS pattern.
  • the DMRS is given to the user equipment.
  • the second DMRS pattern may be a DMRS pattern usable by the FDD system, but is not limited thereto.
  • the embodiment is based on the foregoing embodiment of FIG. 1, that is, determining a first demodulation reference signal DMRS pattern for the first downlink subframe, and determining the second downlink subframe for the second downlink subframe.
  • the method may further include: transmitting the DMRS pattern indication information to the user equipment, where the DMRS pattern indication information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern And indication information of the second DMRS pattern.
  • the indication information of the determined first DMRS pattern may be sent to The user equipment may also send the determined indication information of the first DMRS pattern and the determined indication information of the second DMRS pattern to the user equipment.
  • the first DMRS is received on the time domain and the frequency domain resource corresponding to the first DMRS pattern of the first downlink subframe;
  • the second DMRS is received on the time domain and the frequency domain resource of the other downlink sub-frames except the first downlink sub-frame according to the existing pattern (such as the DMRS pattern that can be used by the FDD system);
  • the user equipment receives the indication information of the first DMRS pattern and the indication information of the second DMRS pattern, the user equipment receives the first time and the frequency domain resources corresponding to the first DMRS pattern of the first downlink subframe.
  • a DMRS receives the second DMRSo on the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe, where the second DMRS pattern may also be a DMRS pattern that can be used by the FDD system.
  • the method for sending the DMRS pattern indication information to the user equipment includes: Transmitting the DMRS pattern indication information to the user equipment by using a broadcast; or transmitting the DMRS pattern indication information to a user equipment by using a radio resource control (RRC) signal; or The indication information is sent to the user equipment through a physical downlink control channel.
  • RRC radio resource control
  • different configurations are configured for the first downlink subframe and the second downlink subframe of the user equipment.
  • the DMRS pattern, and the DMRS is sent to the user equipment on the time domain and the frequency domain resource corresponding to the DMRS pattern.
  • the receiving end such as the user equipment
  • receives the sending end such as the network device
  • the demodulation reference signal transmitted by the base station or the like improves the accuracy of channel estimation, thereby improving system performance.
  • FIG. 2 another flowchart of a method for transmitting a demodulation reference signal according to an embodiment of the present invention is applied to a half-duplex frequency division duplex HD-FDD system, where the method includes:
  • Step 201 Determine a third DMRS pattern for the first downlink subframe and the second downlink subframe, where the first downlink subframe is a set of downlink subframes n-1, and the downlink subframe n- The next subframe n of 1 is an uplink subframe n, n is a positive integer, and the second downlink subframe is a downlink subframe other than the first downlink subframe;
  • the network device may be the first downlink subframe (that is, the first downlink subframe before the user equipment uplink subframe) and the second downlink subframe.
  • the other downlink subframes except the first downlink subframe before the uplink subframe are configured with the same DMRS pattern, that is, the first downlink subframe before the uplink subframe of the user equipment and before the uplink subframe.
  • the other downlink subframes outside the first downlink subframe are configured with the same DMRS pattern, which is called a third DMRS pattern.
  • Step 202 Send a DMRS to the user equipment on a time domain and a frequency domain resource corresponding to the third DMRS pattern, where the user equipment is sent when the DMRS is sent in the first downlink subframe.
  • the DMRS is not sent on the time domain and the frequency domain resource corresponding to the guard interval.
  • the guard interval is when the user equipment receives data on the first downlink subframe n-1, and is in the uplink. The time when the first downlink subframe n-1 overlaps with the uplink subframe n when data is transmitted on the subframe n.
  • the network device such as a base station
  • the network device can configure the same DMRS pattern (ie, the third DMRS pattern) in the first downlink subframe and the second downlink subframe
  • the first one is before the uplink subframe.
  • the DMRS is sent on the downlink subframe
  • the DMRS is not sent within the guard interval of the user equipment.
  • the third DMRS pattern may be one of the first DMRS pattern or the second DMRS pattern, or may be other DMRS patterns, for example, an alternative DMRS pattern selected from the candidate pattern set, and the like. It is a DMRS pattern that can be used by the FDD system, and is not limited in this embodiment.
  • the manner in which the DMRS is sent to the user equipment in the time domain and the frequency domain resource corresponding to the DMRS in the third DMRS pattern specifically includes: the time domain corresponding to the third DMRS pattern And transmitting, in the frequency domain resource, the DMRS to the user equipment, where the DMRS is spread by a spreading code sequence whose length is less than 4, in the time domain and the frequency domain resource except the guard interval.
  • the DMRS for example, the DMRS may be a DMRS that is spread by a spreading code sequence of length 3.
  • the same DMRS pattern is configured for the first downlink subframe before the uplink subframe of the user equipment and other downlink subframes except the first downlink subframe, and before the uplink subframe
  • the DMRS is not sent on the time domain and the frequency domain resource corresponding to the guard interval of the user equipment, and the receiving end (such as the user equipment) is solved in the HD-FDD system.
  • Receiving demodulation reference signals transmitted by the transmitting end (such as a network device, for example, a base station, etc.) during the guard interval improves the accuracy of channel estimation, thereby improving system performance.
  • the embodiment is performed on the foregoing embodiment of FIG.
  • the method may further include: transmitting DMRS pattern indication information to the user equipment, where the DMRS pattern indication information includes: indication information of the third DMRS pattern.
  • the sending manner of sending the DMRS pattern indication information to the user equipment may include the following three methods, but is not limited thereto:
  • the indication information of the same DMRS pattern may be sent to the user equipment, so that the user equipment receives the
  • the DMRS is received on the time domain and the frequency domain resource of the DMRS pattern corresponding to the DMRS pattern indication information, and the receiving end (such as a network device, for example, a base station, etc.) is no longer protected in the interval.
  • the transmitted demodulation reference signal improves the accuracy of channel estimation, thereby improving system performance.
  • FIG. 3 is a flowchart of a signal demodulation method according to an embodiment of the present invention. The method is applied to a half-duplex frequency division duplex HD-FDD system, where the method includes:
  • Step 301 Receive a first time on a time domain and a frequency domain resource corresponding to a first DMRS pattern of the first downlink subframe. And receiving, by the DMRS, the second DMRS on the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe, where the first DMRS pattern satisfies: a time domain sum corresponding to the first DMRS pattern
  • the frequency domain resource is not in the guard interval;
  • the first downlink subframe is a set of downlink subframes n-1, and the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer, where the second downlink subframe is a downlink subframe other than the first downlink subframe, where the guard interval time is when the user equipment is in the first downlink subframe n-1
  • the receiving, in the step, the DMRS on the time domain and the frequency domain resource corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe specifically: the first downlink subframe and the second downlink Transmitting and receiving the DMRS on the time domain and the frequency domain resource except the guard interval time in the time domain and the frequency domain resource corresponding to the third DMRS pattern of the downlink subframe, where the DMRS is less than 4
  • the DMRS after spreading the spreading code sequence for example, the DMRS is a DMRS spread by a spreading code sequence of length 3.
  • Step 302 Demodulate the first downlink subframe by using the first DMRS received on the time domain and the frequency domain resource corresponding to the first DMRS pattern, and use the time corresponding to the second DMRS pattern.
  • the second DMRS received on the domain and the frequency domain resource demodulates the other downlink subframes.
  • the second DMRS pattern may be a DMRS pattern that can be used by the FDD system, or may be other DMRS patterns, which is not limited in this embodiment.
  • the first DMRS pattern is further configured to meet: the time domain and the frequency domain resource corresponding to the first DMRS pattern.
  • the last OFDM symbol is the last received OFDM symbol of the first downlink subframe; or the last time domain and frequency domain resource corresponding to the first DMRS pattern is located An OFDM symbol, before the last OFDM symbol received by the first downlink subframe, and as close as possible to the last OFDM symbol received by the first downlink subframe.
  • the time domain and the frequency domain resource corresponding to the first DMRS pattern and the second DMRS pattern may be pre-agreed, or may be determined after the network device determines, and the corresponding DMRS pattern is determined.
  • the indication information is sent to the user equipment.
  • the embodiment receives, according to the foregoing embodiment, the first DMRS on the time domain and the frequency domain resource corresponding to the first DMRS pattern of the first downlink subframe; Before receiving the second DMRS in the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe, the method may further include: receiving, by the network device, indication information of the DMRS pattern determined by the user equipment, where The indication information of the DMRS pattern includes: indication information of the first DMRS pattern; or the first DMRS pattern The indication information and the indication information of the second DMRS pattern.
  • the method for receiving the indication information of the DMRS pattern that is sent by the network device for the user equipment includes: receiving the indication information of the DMRS pattern that is determined by the network device to be sent by the user equipment by using the broadcast; or receiving the network device by using the radio resource.
  • the time domain and the frequency domain resource corresponding to the first DMRS pattern and the second DMRS map may be pre-agreed by the user equipment and the network device, or may be the network device being the user equipment.
  • the indication information of the corresponding DMRS pattern is notified to the user equipment by means of broadcast, or by radio resource control RRC broadcast signaling or unicast signaling.
  • the user equipment receives the DMRS on the time domain and the frequency domain resource corresponding to the DMRS pattern of the first downlink subframe, and the time domain and the frequency domain resource corresponding to the DMRS pattern of the second downlink subframe, and Demodulating the corresponding downlink subframe by using the received DMRS, which solves the problem that the user equipment can receive the DMRS sent by the network device in the guard interval time in the HD-FDD system, improve the channel estimation precision, and improve the system. performance.
  • FIG. 4 another flowchart of a signal demodulation method according to an embodiment of the present invention is applied to a half-duplex frequency division duplex HD-FDD system, where the method includes:
  • Step 401 Receive a DMRS on a time domain and a frequency domain resource corresponding to a third DMRS pattern of the first downlink subframe and the second downlink subframe, where the DMRS is received on the first downlink subframe.
  • the DMRS is not received on the time domain and the frequency domain resource corresponding to the guard interval of the user equipment, where the first downlink subframe is a set of downlink subframes n-1, and the downlink sub
  • the next subframe n of the frame n-1 is the uplink subframe n
  • n is a positive integer
  • the second downlink subframe is a downlink subframe other than the first downlink subframe
  • the guard interval is When the user equipment receives data on the first downlink subframe n-1 and transmits data on the uplink subframe n, the first downlink subframe n-1 and the uplink subframe The time at which frames n overlap;
  • the receiving the DMRS on the time domain and the frequency domain resource corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe includes: the first downlink subframe and the second downlink.
  • the DMRS is received on the time domain and the frequency domain resource except the guard interval time in the time domain and the frequency domain resource corresponding to the third DMRS pattern of the subframe, where the DMRS is an extension that is less than 4 in length.
  • the DMRS after the frequency code sequence is spread.
  • the DMRS is a DMRS that is spread by a spreading code sequence of length 3.
  • Step 402 Demodulate the first downlink subframe and the second downlink subframe by using the DMRS.
  • the embodiment is based on the embodiment shown in FIG. 4, and is in the first downlink.
  • the method may further include: receiving, by the network device, indication information of the DMRS pattern determined by the user equipment, where The indication information of the DMRS pattern includes: indication information of the third DMRS pattern.
  • the third DMRS pattern may be a DMRS pattern that can be used by the FDD system.
  • the indication information of the DMRS pattern that is sent by the network device and is determined by the user equipment includes: receiving, by the network device, indication information of the DMRS pattern that is determined by the user equipment to be sent by the user equipment; or, the receiving network device controls the RRC information by using the radio resource. And the indication information of the DMRS pattern that is sent by the user equipment, or the indication information that the network device sends the determined DMRS pattern by using the physical downlink control channel.
  • the user equipment receives the DMRS on the time domain and the frequency domain resource corresponding to the DMRS pattern of all the downlink subframes, and does not receive the time domain and the frequency domain resources corresponding to the guard interval of the user equipment.
  • Decoding the DMRS and demodulating the corresponding downlink subframe by using the received DMRS which solves the problem that the user equipment can receive the DMRS sent by the network device in the guard interval time in the HD-FDD system, thereby improving the channel estimation accuracy. And improved system performance.
  • the embodiment of the present invention further provides a transmitting apparatus for demodulating a reference signal, and a schematic structural diagram thereof is shown in FIG. 5.
  • the transmitting apparatus of the demodulated reference signal is applied to a half-duplex frequency division duplex HD.
  • the FDD system, the transmitting device 5 for demodulating the reference signal comprises: a determining unit 51 and a first transmitting unit 52, wherein
  • the determining unit 51 is configured to determine a first demodulation reference signal DMRS pattern for the first downlink subframe, and determine a second DMRS pattern for the second downlink subframe, where the first DMRS pattern meets: The time domain and the frequency domain resource corresponding to the first DMRS pattern are not within the guard interval time; the first downlink subframe is a set of downlink subframes n-1, and the next subframe of the downlink subframe n-1
  • the frame n is an uplink subframe n, n is a positive integer, and the second downlink subframe is a downlink subframe other than the first downlink subframe, where the guard interval time is when the user equipment is in the When the data is received on the first downlink subframe n-1, and the data is transmitted on the uplink subframe n, the time when the first downlink subframe n-1 overlaps with the uplink subframe n;
  • the first sending unit 52 is configured to send the first DMRS to the user equipment on the time domain and the frequency domain
  • the first DMRS pattern determined by the determining unit may further satisfy: a last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located, and is the last of the first downlink subframe a received orthogonal frequency division multiplexing OFDM symbol; or a time domain sum corresponding to the first DMRS pattern The last OFDM symbol in which the frequency domain resource is located, before the last OFDM symbol received by the first downlink subframe, and as close as possible to the last OFDM symbol received in the first downlink subframe.
  • the determining unit determines, according to all the foregoing embodiments, the first demodulation reference signal DMRS pattern for the first downlink subframe, specifically: the special subframe that can be used from the time division duplex TDD system.
  • the first DMRS pattern is determined in a DMRS pattern.
  • the determining unit determines, according to the foregoing embodiment, the first demodulation reference signal DMRS pattern for the first downlink subframe, specifically: the candidate DMRS pattern from the first downlink subframe Determining the first DMRS pattern in a centralized manner; wherein the candidate DMRS pattern set includes at least one DMRS pattern, and the time domain and frequency domain resources corresponding to the at least one DMRS pattern are not in the guard interval time.
  • the apparatus may further include: a second sending unit, configured to determine, in the determining unit, a first demodulation reference signal DMRS pattern for the first downlink subframe, and After the second DMRS pattern is determined for the second downlink subframe, the DMRS pattern indication information is sent to the user equipment, where the DMRS pattern indication information includes: indication information of the first DMRS pattern; or an indication of the first DMRS pattern Information and indication information of the second DMRS pattern.
  • a second sending unit configured to determine, in the determining unit, a first demodulation reference signal DMRS pattern for the first downlink subframe, and After the second DMRS pattern is determined for the second downlink subframe, the DMRS pattern indication information is sent to the user equipment, where the DMRS pattern indication information includes: indication information of the first DMRS pattern; or an indication of the first DMRS pattern Information and indication information of the second DMRS pattern.
  • the sending, by the second sending unit, the DMRS pattern indication information to the user equipment specifically: sending the DMRS pattern indication information to the user equipment by using a broadcast; or: controlling the DMRS pattern indication information by using a radio resource
  • the RRC signaling is sent to the user equipment; or the DMRS pattern indication information is sent to the user equipment through a physical downlink control channel.
  • the second DMRS pattern determined by the determining unit may be a DMRS pattern that can be used by the FDD system, or may be other applicable DMRS patterns, which is not limited in this embodiment.
  • the embodiment of the present invention further provides a transmitting apparatus for demodulating a reference signal, where the apparatus is applied to a half-duplex frequency division duplex HD-FDD system, where the apparatus includes: a determining unit and a first sending unit, where
  • the determining unit is configured to determine a third demodulation reference signal DMRS pattern for the first downlink subframe and the second downlink subframe, where the first downlink subframe is a set of downlink subframes n-1, and the next downlink subframe of frame n-1 and n is an uplink subframe n, where n is a positive integer, the second downlink sub-frame other than the first downlink subframe of the downlink subframe;
  • the first sending unit is configured to send a DMRS to the user equipment on a time domain and a frequency domain resource corresponding to the third DMRS pattern, where the DMRS is sent when the first downlink subframe is sent.
  • the guard interval is when the user equipment receives data on the first downlink subframe n-1, and the data is sent on the uplink subframe n, the first downlink subframe n -1 The time overlapped with the uplink subframe n.
  • the first sending unit sends the DMRS to the user equipment on the time domain and the frequency domain resource corresponding to the DMRS in the third DMRS pattern, and the method includes: the sending unit corresponding to the third DMRS pattern And transmitting, in the time domain and the frequency domain resource, the DMRS to the user equipment, where the DMRS is a spreading code with a length less than 4, and other time domain and frequency domain resources except the guard interval time.
  • the DMRS after the sequence is spread.
  • the DMRS is a DMRS that is spread by a spreading code sequence of length 3.
  • the device may further include: a second sending unit, configured to send the DMRS pattern indication information to the user after the determining unit determines the third DMRS pattern for the first downlink subframe and the second downlink subframe
  • the DMRS pattern indication information includes: indication information of the third DMRS pattern.
  • the sending, by the second sending unit, the DMRS pattern indication information to the user equipment by: transmitting the DMRS pattern indication information to the user equipment by using a broadcast manner; or controlling the DMRS pattern indication information by using a radio resource
  • the RRC signaling is sent to the user equipment; or the DMRS pattern indication information is notified to the user equipment by using a downlink physical control channel.
  • the third DMRS pattern determined by the determining unit is a DMRS pattern that can be used by the FDD system, and may also be other applicable DMRS patterns, which is not limited in this embodiment.
  • an embodiment of the present invention provides a signal demodulating apparatus, which is shown in FIG. 6.
  • the apparatus is applied to a half-duplex frequency division duplex HD-FDD system, and the signal demodulating apparatus 6 includes: a receiving unit 61 and a demodulating unit 62, wherein
  • the first receiving unit 61 receives the first DMRS on the time domain and the frequency domain resource corresponding to the first DMRS pattern of the first downlink subframe, and corresponds to the time domain corresponding to the second DMRS pattern of the second downlink subframe. And receiving the second DMRS on the frequency domain resource, where the first DMRS pattern is: the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval; the first downlink subframe is a set of downlink subframes n-1, and the next subframe n of the downlink subframe n-1 is an uplink subframe n, n is a positive integer, and the second downlink subframe is a first downlink a downlink subframe other than the subframe, where the guard interval time is when the user equipment receives data on the first downlink subframe n-1, and when the data is sent on the uplink subframe n, a time when the first downlink subframe n-1 overlaps with the uplink subframe n; the demodulation
  • the first DMRS pattern received by the first receiving unit may further satisfy: the last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located, where the first downlink is The last received OFDM symbol of the OFDM symbol; or the last OFDM symbol of the time domain and the frequency domain resource corresponding to the first DMRS pattern, received in the first downlink subframe Before the last OFDM symbol, and as close as possible to the last OFDM symbol received by the first downlink subframe.
  • the device may further include: a second receiving unit, configured to receive, by the first receiving unit, a first DMRS from a time domain and a frequency domain resource corresponding to the first DMRS pattern of the first downlink subframe And receiving, from the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe, the indication information of the DMRS pattern determined by the network device and sent by the network device, the indication of the DMRS pattern, before receiving the second DMRS on the time domain and the frequency domain resource corresponding to the second DMRS pattern of the second downlink subframe
  • the information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern and indication information of the second DMRS pattern.
  • the second receiving unit receives the indication information of the DMRS pattern that is sent by the network device and is determined by the network device, and the method includes: receiving, by the network device, the indication information of the DMRS pattern that is determined by the user equipment to be sent by the user equipment; or receiving the network device
  • the RRC signaling sent by the RRC signaling is indication information of the DMRS pattern determined by the user equipment, or the receiving network device sends the indication information of the determined DMRS pattern through the physical downlink control channel.
  • the embodiment of the present invention further provides a signal demodulating device, where the device is applied to a half-duplex frequency division duplex HD-FDD system, where the device includes: a first receiving unit and a demodulating unit, where
  • the first receiving unit is configured to receive a DMRS on a time domain and a frequency domain resource corresponding to a third DMRS pattern of the first downlink subframe and the second downlink subframe, where the first downlink subframe is in the first downlink subframe
  • the DMRS is not received on the time domain and the frequency domain resource corresponding to the guard interval of the user equipment, where the first downlink subframe is a set of downlink subframes n-1.
  • the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer
  • the second downlink subframe is a downlink subframe other than the first downlink subframe.
  • the protection interval is when the user equipment receives data on the first downlink subframe n-1, and when the data is sent on the uplink subframe n, the first downlink subframe n- a time when the uplink subframe n overlaps with the uplink subframe n; the demodulation unit is configured to demodulate the first downlink subframe and the second downlink subframe by using the DMRS.
  • the third DMRS pattern pair of the first receiving unit in the first downlink subframe and the second downlink subframe Receiving the DMRS on the time domain and the frequency domain resource includes: in the time domain and the frequency domain resource corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe,
  • the DMRS is transmitted and received on other time domain and frequency domain resources outside the guard interval, where the DMRS is a DMRS that is spread by the length of the spreading code sequence.
  • the DMRS is a DMRS that is spread by a spreading code sequence of length 3.
  • the device may further include: a second receiving unit, configured to: in the time domain and the frequency domain corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe, in the first receiving unit Before receiving the DMRS on the resource, receiving the indication information of the DMRS pattern that is sent by the network device and determined by the user equipment, where the indication information of the DMRS pattern includes: indication information of the third DMRS pattern.
  • a second receiving unit configured to: in the time domain and the frequency domain corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe, in the first receiving unit Before receiving the DMRS on the resource, receiving the indication information of the DMRS pattern that is sent by the network device and determined by the user equipment, where the indication information of the DMRS pattern includes: indication information of the third DMRS pattern.
  • the second receiving unit receives the indication information of the DMRS pattern that is sent by the network device and is determined by the network device, and the method includes: receiving, by the network device, the indication information of the DMRS pattern that is determined by the user equipment to be sent by the user equipment; or receiving the network device
  • the radio resource controls the indication information of the DMRS pattern determined by the RRC signaling for the user equipment; or the indication information that the network device sends the determined DMRS pattern by using the physical downlink control channel.
  • the embodiment of the present invention further provides a network device, where the network device is applied to a half-duplex frequency division duplex HD-FDD system, and a schematic structural diagram thereof is shown in FIG. 7.
  • the network device 7 includes: a processor 71. And a wireless transceiver 72, wherein
  • the processor 71 is configured to determine a first demodulation reference signal DMRS pattern for the first downlink subframe, and determine a second DMRS pattern for the second downlink subframe, where the first DMRS pattern meets: The time domain and the frequency domain resource corresponding to the first DMRS pattern are not within the guard interval time; the first downlink subframe is a set of downlink subframes n-1, and the next subframe of the downlink subframe n-1
  • the frame n is an uplink subframe n, n is a positive integer, and the second downlink subframe is a downlink subframe other than the first downlink subframe, where the guard interval time is when the user equipment is in the When the data is received on the first downlink subframe n-1, and the data is transmitted on the uplink subframe n, the first downlink subframe n-1 overlaps with the uplink subframe n;
  • the wireless transceiver 72 is configured to send the first DMRS to the user equipment on the time domain and the frequency domain resource
  • the determining, by the processor, the first DMRS pattern for the first downlink subframe, the first OFDM symbol, where the time domain and the frequency domain resource corresponding to the first DMRS pattern are located, The last received orthogonal frequency division multiplexing OFDM symbol of a downlink subframe; or, the first DMRS diagram The last OFDM symbol in which the time domain and the frequency domain resource corresponding to the case are located, before the last OFDM symbol received by the first downlink subframe, and as close as possible to the received by the first downlink subframe The last OFDM symbol.
  • the determining, by the processor, the first DMRS pattern for the first downlink subframe includes: determining the first DMRS pattern from a DMRS pattern that can be used in a special subframe of the time division duplex TDD system.
  • the determining, by the processor, the first DMRS pattern for the first downlink subframe includes:
  • the candidate DMRS pattern set includes at least one DMRS pattern, and the time domain and frequency corresponding to the at least one DMRS pattern The domain resource is not in the guard interval.
  • the wireless transceiver is further configured to send the DMRS pattern indication information
  • the DMRS pattern indication information includes: indication information of the first DMRS pattern; or indication information of the first DMRS pattern and indication information of the second DMRS pattern.
  • the wireless transceiver is specifically configured to: send the DMRS pattern indication information to the user equipment by: transmitting the DMRS pattern indication information to the user equipment by using a broadcast; or: indicating the DMRS pattern indication information And transmitting, by the RRC signaling, the RRC signaling to the user equipment; or sending the DMRS pattern indication information to the user equipment by using a physical downlink control channel.
  • the determining unit determines, for the second downlink subframe, that the second DMRS pattern is a DMRS pattern that can be used by the FDD system.
  • the network device may be a base station, or may be another network device, which is not limited in this embodiment.
  • the network device may be a base station, or may be another network device, which is not limited in this embodiment.
  • the embodiment of the present invention further provides another network device, where the network device is applied to a half-duplex frequency division duplex HD-FDD system, where the network device includes: a processor and a wireless transceiver, where
  • the processor is configured to determine a third demodulation reference signal DMRS pattern for the first downlink subframe and the second downlink subframe, where the wireless transceiver is configured to determine the third DMRS at the processor
  • the DMRS is sent to the user equipment on the time domain and the frequency domain resource corresponding to the pattern, where the DMRS is sent in the first downlink subframe, and the time interval corresponding to the guard interval of the user equipment is The DMRS is not sent on the frequency domain resource, where the first downlink subframe is a set of downlink subframes n-1, and the next subframe n of the downlink subframe n-1 is an uplink subframe And n is a positive integer, the second downlink subframe is a downlink subframe except the first downlink subframe, where the guard interval time is when the user equipment is in the first downlink subframe Number of received on -1 And the time when the first downlink subframe n-1 overlaps with the uplink subframe n when the data is transmitted on the uplink subframe
  • the wireless transceiver is configured to send the DMRS to the user equipment on the time domain and the frequency domain resource corresponding to the third DMRS pattern in the following manner: the time domain and the corresponding corresponding to the third DMRS pattern And transmitting, in the frequency domain resource, the DMRS to the user equipment, where the DMRS is spread by a spreading code sequence whose length is less than 4, in the time domain and the frequency domain resource except the guard interval time.
  • DMRS is a DMRS that is spread by a spreading code sequence of length 3.
  • the wireless transceiver is further configured to send the DMRS pattern indication information to the user equipment, where the DMRS
  • the pattern indication information includes: indication information of the third DMRS pattern.
  • the wireless transceiver is further configured to: send the DMRS pattern indication information to the user equipment by: transmitting the DMRS pattern indication information to the user equipment by using a broadcast manner; or indicating the DMRS pattern The information is sent to the user equipment by using the radio resource control RRC signaling; or the DMRS pattern indication information is notified to the user equipment by using a downlink physical control channel.
  • the third DMRS pattern determined by the determining unit is a DMRS pattern usable by the FDD system.
  • the network device may be a base station, or may be another network device, which is not limited in this embodiment.
  • the network device may be a base station, or may be another network device, which is not limited in this embodiment.
  • the embodiment of the present invention further provides a user equipment, which is applied to a half-duplex frequency division duplex HD-FDD system, and a schematic structural diagram thereof is shown in FIG. 8.
  • the user equipment 8 includes: a transceiver 81 and a processor 82. , among them,
  • the transceiver is configured to receive a first DMRS on a time domain and a frequency domain resource corresponding to a first DMRS pattern of the first downlink subframe; and a time domain sum corresponding to the second DMRS pattern of the second downlink subframe
  • the second DMRS is received on the frequency domain resource, where the first DMRS pattern is: the time domain and the frequency domain resource corresponding to the first DMRS pattern are not in the guard interval; the first downlink subframe is the downlink.
  • the processor is configured to receive, by using the transceiver 81, time domain and frequency domain resources corresponding to the first DMRS pattern Decoding the first downlink subframe by the DMRS, And demodulating the other downlink subframes by using the DMRS received on the time domain and the frequency domain resource corresponding to the second DMRS pattern.
  • the first DMRS pattern received by the transceiver is further required to satisfy: the last OFDM symbol in which the time domain and the frequency domain resource corresponding to the first DMRS pattern are located, where is the first downlink The last received OFDM symbol of the OFDM symbol; or the last OFDM symbol of the time domain and the frequency domain resource corresponding to the first DMRS pattern, received in the first downlink subframe Before the last OFDM symbol, and as close as possible to the last OFDM symbol received by the first downlink subframe.
  • the transceiver receives the first DMRS on a time domain and a frequency domain resource corresponding to the first DMRS pattern of the first downlink subframe; and is in a time domain corresponding to the second DMRS pattern of the second downlink subframe.
  • the DMRS pattern indication information is sent by the network device, where the DMRS pattern indication information includes: indication information of the first DMRS pattern; or the first DMRS pattern The indication information and the indication information of the second DMRS pattern.
  • the transceiver is specifically configured to receive the DMRS pattern indication information sent by the network device according to the following manner: receiving indication information of the DMRS pattern determined by the network device to be sent by the user equipment by using the broadcast; or receiving the network device by using the radio resource Controlling, by the RRC signaling, indication information of the DMRS pattern determined by the user equipment, or receiving indication information that the network device sends the determined DMRS pattern by using the physical downlink control channel.
  • the second DMRS pattern received by the transceiver is a DMRS pattern usable by the FDD system.
  • the embodiment of the present invention further provides a user equipment, which is applied to a half-duplex frequency division duplex HD-FDD system, where the user equipment includes: a transceiver and a processor, where
  • the transceiver is configured to receive a DMRS on a time domain and a frequency domain resource corresponding to a third DMRS pattern of the first downlink subframe and the second downlink subframe, where the DMRS is received on the first downlink subframe
  • the DMRS is not received by the time domain and the frequency domain resource corresponding to the guard interval of the user equipment, where the first downlink subframe is a set of downlink subframes n-1, and
  • the next subframe n of the downlink subframe n-1 is an uplink subframe n, where n is a positive integer
  • the second downlink subframe is a downlink subframe other than the first downlink subframe.
  • the protection interval is when the user equipment receives data on the first downlink subframe n-1 and transmits data on the uplink subframe n, the first downlink subframe n-1 and The time at which the uplink subframe n overlaps;
  • the processor is configured to demodulate the first downlink subframe and the second downlink subframe by using the DMRS received by the transceiver.
  • the transceiver receives the DMRS on the time domain and the frequency domain resource corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe according to the following manner: in the first downlink sub Transmitting and receiving DMRS on the time domain and frequency domain resources except the guard interval time in the time domain and the frequency domain resource corresponding to the third DMRS pattern of the second downlink subframe, where the DMRS is A DMRS that is spread by a spreading code sequence having a length less than four.
  • the DMRS is a DMRS that is spread by a spreading code sequence of length 3.
  • the transceiver before receiving the DMRS on the time domain and the frequency domain resource corresponding to the third DMRS pattern of the first downlink subframe and the second downlink subframe, the transceiver is further configured to: receive the user sent by the network device as a user
  • the indication information of the DMRS pattern determined by the device, the indication information of the DMRS pattern includes: indication information of the third DMRS pattern.
  • the transceiver is configured to receive the indication information of the DMRS pattern that is determined by the network device and is determined by the network device, where the network device sends the indication of the DMRS pattern that is determined by the network device to be sent by the user equipment, or the receiving network. And the device sends the indication information of the DMRS pattern determined by the RRC signaling to the user equipment by using the radio resource control; or the indication information that the network device sends the determined DMRS pattern by using the physical downlink control channel.
  • the third DMRS pattern received by the transceiver is a DMRS pattern usable by the FDD system.
  • Application Example 1 to Application Example 5 are for the case of a normal cyclic prefix (CP, Cyclic Prefix), and Application Example 6 to Application Example 8 are for the case of an extended CP.
  • CP normal cyclic prefix
  • Application Example 6 to Application Example 8 are for the case of an extended CP.
  • the network device determines a DMRS pattern (ie, a first DMRS pattern) for the first downlink subframe of the user equipment, as shown in FIG. 9A and FIG. 9B,
  • FIG. 9A is A schematic diagram of a DMRS pattern used by a first downlink subframe in a resource block (RB) according to an embodiment of the present invention
  • FIG. 9B is a schematic diagram of a first downlink subframe used in an RB according to an embodiment of the present invention.
  • Another schematic diagram of the DMRS pattern wherein, in FIGS.
  • the horizontal axis represents time latitude
  • the horizontal axis represents 14 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB.
  • Each small box represents a time-frequency resource unit
  • the resource location where the black small box is located is the time-frequency resource bit corresponding to the first DMRS pattern.
  • FIGS. 10A and 10B For the DMRS pattern of the second downlink subframe (ie, the second DMRS pattern), as shown in FIGS. 10A and 10B.
  • 10A is a schematic diagram of a DMRS pattern of a second downlink subframe in an RB according to an embodiment of the present invention.
  • FIGS. 10B is another schematic diagram of a DMRS pattern of a second downlink subframe in an RB according to an embodiment of the present invention.
  • the horizontal axis represents time latitude
  • the horizontal axis represents 14 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB
  • each small box represents one time.
  • the resource location where the black small box is located is the time-frequency resource location corresponding to the second DMRS pattern.
  • the DMRS patterns of the antenna ports 7, 8, 11, 13 are taken as an example; in the FIG. 9B, the DMRS patterns of the antenna ports 9, 10, 12, and 14 are taken as an example, and the antenna ports are interchangeable.
  • the DMRS pattern of the antenna ports 7, 8, 11, 13 is taken as an example, but is not limited thereto; in FIG. 10B, the DMRS pattern of the antenna ports 9, 10, 12, 14 is taken as an example, and the antenna port is used. Can be interchanged.
  • the DMRS pattern (ie, the first DMRS pattern) is determined for the first downlink subframe of the user equipment (ie, the first downlink subframe before the uplink subframe), such as 11A and 11B;
  • FIG. 11A is a schematic diagram of a DMRS pattern used in a first downlink subframe in a resource block according to an embodiment of the present invention;
  • FIG. 11B is the first in an RB according to an embodiment of the present invention;
  • the horizontal axis represents time latitude
  • the horizontal axis represents 14 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB
  • each small box represents a time frequency.
  • the resource unit, the resource location where the black small box is located, is the time domain and frequency domain resource location corresponding to the first DMRS pattern.
  • the DMRS patterns of the antenna ports 7, 8, 11, 13 are taken as an example, but are not limited thereto; in FIG. 11B, the DMRS patterns of the antenna ports 9, 10, 12, 14 are taken as an example, but Not limited to this.
  • the network device configures the DMRS pattern (ie, the first DMRS pattern) for the first downlink subframe of the user equipment (ie, the first downlink subframe before the uplink subframe), and is selected to adopt As shown in the DMRS pattern of FIG. 9A and FIG. 9B, the DMRS pattern of FIG. 11A and FIG. 11B is adopted, and after the network device completes the selection, the network device may notify the RRC broadcast signaling or the unicast signaling by means of broadcast or radio resource control.
  • the DMRS pattern is specifically used by the receiving end (that is, the user equipment). Of course, the DMRS pattern can be specifically used by the receiving end by using other auxiliary information, which is not limited in this embodiment. For the other sub-frames, the DMRS patterns shown in Figs. 10A and 10B are still used.
  • the network device is the first downlink subframe of the user equipment.
  • the first downlink subframe before the uplink subframe Configuring a DMRS pattern, which may be adaptively or conventionally or fixedly selecting a DMRS pattern from the candidate pattern set, and after selecting a DMRS pattern.
  • the transmitting end informs the receiving end of the selected pattern indication or pattern number, etc. by means of broadcast or radio resource control RRC broadcast signaling or unicast signaling.
  • RRC broadcast signaling or unicast signaling This embodiment provides an example of an alternative pattern set, but is not limited thereto. Specifically, as shown in FIG. 12A and FIG. 12B, FIG.
  • FIG. 12A is an alternative of the first downlink subframe in a resource block according to an embodiment of the present invention.
  • FIG. 12B is another schematic diagram of an alternative DMRS pattern set of a first downlink subframe in a resource block according to an embodiment of the present invention.
  • the horizontal axis represents time latitude
  • the horizontal axis represents 14 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB
  • each small box represents one time.
  • the frequency resource unit, the resource location where the black small box is located, is the time-frequency resource location corresponding to the first DMRS pattern.
  • the candidate pattern has n (ie, from 1 to n) candidate patterns, and if the candidate pattern m is selected as the DMRS pattern from the pattern candidate set, the transmitting end transmits using the candidate pattern m.
  • the DMRS reference signal sequence and informs the receiving end to use the candidate pattern m by signaling or other auxiliary information.
  • the DMRS pattern as shown in Figs. 10A and 10B is employed.
  • the DMRS pattern of the first downlink subframe antenna port 7, 8, 11, 13 before the HD-FDD uplink subframe is taken as an example, but is not limited thereto; in FIG. 12A, The DMRS pattern 1 of the first downlink subframe before the uplink subframe; in FIG. 12B, the DMRS pattern of the first downlink subframe antenna ports 9, 10, 12, 14 before the HD-FDD uplink subframe is taken as an example. But it is not limited to this.
  • the upper pattern represents: the first downlink subframe before the uplink subframe
  • the middle pattern indicates: the DMRS pattern m of the first downlink subframe before the uplink subframe, and the lower pattern indicates: the DMRS pattern n of the first downlink subframe before the uplink subframe.
  • FIG. 13A is a schematic diagram of a DMRS pattern of a first downlink subframe of a HD-FDD in a PRB according to an embodiment of the present invention
  • FIG. 13B is a first downlink subframe of a HD-FDD in a PRB according to an embodiment of the present invention
  • Another schematic of the DMRS pattern is shown in FIG. 13A and FIG.
  • the horizontal axis represents time latitude
  • the horizontal axis represents 14 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB
  • each small box represents one time.
  • the frequency resource unit, the resource location where the black small box is located is the time-frequency resource location corresponding to the third DMRS pattern;
  • the DMRS patterns of the antenna ports 7, 8, 11 and 13 are taken as an example; the FIG. 13B
  • the DMRS pattern of antenna ports 9, 10 12 and 14 is taken as an example.
  • the DMRS patterns of antenna ports 7 8 11 and 13 are interchangeable with the DMRS patterns of antenna ports 9 10 12 and 14.
  • the last downlink OFDM symbol in the first downlink subframe is used as the guard interval time from the downlink subframe to the uplink subframe, as shown by the label 1 in FIG. 13A and the label 1 in FIG. 13B. Shown.
  • the user equipment does not receive downlink data sent by the network device.
  • the network device sends the DMRS on the first downlink subframe
  • the DMRS is only transmitted on the OFDM symbol at the 6th 7 13th (counting from 1), and the DMRS antenna ports 7 8 11 and 9 10 12 respectively adopt the orthogonality of length 3.
  • the spreading code sequence spreads the DMRS sequence. As shown in Table 1, Table 1 gives an example of a sequence of orthogonal spreading codes of length 3.
  • the antenna ports 7 8 11 13 and 9 10 12 14 use the orthogonal spreading code sequence length 4 of the DMRS.
  • the sequence is spread, and the spreading code sequence used is consistent with the spreading code sequence of the FDD in the existing protocol, and details are not described herein again.
  • the network device configures the DMRS pattern of the first downlink subframe of the user equipment (that is, the first downlink subframe before the uplink subframe), as shown in FIG. 14A.
  • 14A is a schematic diagram of a DMRS pattern of a first downlink subframe in a case where an HD-FDD system is extended by a CP according to an embodiment of the present invention; and for other downlink subframes, as shown in FIG. 14B, FIG. 14B is an embodiment of the present invention.
  • HD-FDD provided A schematic diagram of a DMRS pattern of a second downlink subframe in the case of a system extension CP.
  • the horizontal axis represents time latitude
  • the horizontal axis represents 12 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB
  • each small box represents one time.
  • the resource location where the black small box is located is the time-frequency resource location corresponding to the first DMRS pattern
  • the resource location where the black small box is located in FIG. 14B is the time-frequency resource corresponding to the second DMRS pattern. position.
  • the first downlink subframe DMRS pattern before the HD-FDD uplink subframe is taken as an example, but is not limited thereto.
  • the FDD downlink subframe DMRS pattern is taken as an example, but is not limited thereto.
  • the network device adaptively or fixedly selects a DMRS pattern from the candidate pattern set in the first downlink subframe before the uplink subframe, and the network device (transmitting end)
  • the signal number or the pattern indication selected by the user equipment (receiving end) is notified by signaling or other auxiliary information, as shown in FIG. 15, FIG. 15 is the first in the case of the HD-FDD system extended CP according to the embodiment of the present invention.
  • a schematic diagram of a downlink subframe assuming that there are n candidate patterns in the candidate pattern set, if the pattern m is selected as the DMRS pattern from the pattern candidate set, the transmitting end transmits the DMRS reference signal sequence using the pattern m, and passes signaling or other The auxiliary information informs the receiving end to use the pattern m. It should be noted that other patterns that can be used differently from the existing protocol FDD and TDD special subframes are within the scope of the embodiment. For the DMRS patterns of other downlink subframes, as shown in FIG. 14B.
  • the horizontal axis represents time latitude
  • the horizontal axis represents 12 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB
  • each small box represents a time-frequency resource unit
  • a small black box The location of the resource is the time-frequency resource location corresponding to the first DMRS pattern.
  • the first downlink subframe DMRS pattern before the HD-FDD uplink subframe is taken as an example, but is not limited thereto.
  • the upper pattern represents the DMRS pattern 1 of the first downlink subframe before the uplink subframe
  • the middle pattern represents the DMRS pattern m of the first downlink subframe before the uplink subframe
  • the lower pattern indicates The DMRS pattern n of the first downlink subframe before the uplink subframe.
  • the DMRS pattern configured by the network device for the first downlink subframe of the user equipment may be a fixed DMRS pattern.
  • FIG. 14 is another schematic diagram of a DMRS pattern of a first downlink subframe in an extended CP state of an HD-FDD system according to an embodiment of the present invention.
  • the Figure 14 uses a sequence of orthogonal spreading codes of length 3, as shown in Table 2, which gives an example of a sequence of orthogonal spreading codes of length 3.
  • the DMRS pattern of the frame is as shown in Fig. 12B.
  • the horizontal axis represents time latitude
  • the horizontal axis represents 12 OFDM symbols in one subframe
  • the vertical axis represents 12 subcarriers in one RB
  • each small box represents a time-frequency resource unit
  • a small black box The location of the resource is the time-frequency resource location corresponding to the first DMRS pattern.
  • the DMRS pattern vacates the last OFDM symbol for use as a guard interval for the downlink subframe to the uplink subframe, as shown by reference numeral 1.
  • the embodiment of the present invention only provides an example of a spreading sequence of length 3, the embodiment of the present invention is not limited to the length of the spreading sequence being 3, and may be smaller than Other values of 4, for example, the length of the spreading sequence may also be 2, or no spreading (ie, the length of the spreading sequence is 1).
  • the embodiment of the present invention can be applied to other types of wireless random access systems, such as Universal Mobile Telecommunications System (UMTS, 802.16e, etc.), and the implementation process is similar to the above embodiment. See above, no longer repeat them here.
  • UMTS Universal Mobile Telecommunications System
  • 802.16e 802.16e
  • the user equipment when the downlink subframe is switched to the uplink subframe, the user equipment can receive the downlink channel information sent by the network device during the guard interval.
  • the UE may be any one of the following, and may be static or mobile.
  • the static UE may be specifically included as a terminal, a mobile station, and a mobile station. ( subscriber unit) or station, etc., the mobile UE may specifically include a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a knee
  • PDA personal digital assistant
  • WLL wireless local loop
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.
  • a computer device which may be a personal computer, server, or network device, etc.

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Abstract

L'invention concerne un procédé de transmission de signal de référence de démodulation (DMRS), un procédé de démodulation, un dispositif, un appareil de réseau et un équipement d'utilisateur. Le procédé de transmission consiste à déterminer un premier motif DMRS pour des premières sous-trames en liaison descendante et un second motif DMRS pour des secondes sous-trames en liaison descendante. Le premier motif DMRS remplit les conditions suivantes : les ressources des domaines temporel et fréquentiel qui correspondent au premier motif DMRS ne sont pas dans un intervalle de garde, les premières sous-trames en liaison descendante correspondent à l'ensemble de trames en liaison descendante n-1, les secondes sous-trames en liaison descendante sont des sous-trames en liaison descendante à l'exception des premières sous-trames en liaison descendante, et l'intervalle de garde correspond à l'intervalle de chevauchement des premières sous-trames en liaison descendante n-1 et de sous-trames en liaison montante n quand un équipement d'utilisateur reçoit des données sur les premières sous-trames en liaison descendante n-1 et transmet des données sur les sous-trames en liaison montante n. Sur les ressources des domaines temporel et fréquentiel qui correspondent au premier motif DMRS, un premier DMRS est transmis à l'équipement d'utilisateur et sur les ressources des domaines temporel et fréquentiel qui correspondent au second motif DMRS, un second DMRS est transmis à l'équipement d'utilisateur.
PCT/CN2012/086991 2012-12-20 2012-12-20 Procédé de transmission de signal, procédé de démodulation, dispositif, appareil de réseau et équipement d'utilisateur WO2014094265A1 (fr)

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PCT/CN2012/086991 WO2014094265A1 (fr) 2012-12-20 2012-12-20 Procédé de transmission de signal, procédé de démodulation, dispositif, appareil de réseau et équipement d'utilisateur

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