CN101355412B - Method for transmitting signal - Google Patents
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- CN101355412B CN101355412B CN 200810135522 CN200810135522A CN101355412B CN 101355412 B CN101355412 B CN 101355412B CN 200810135522 CN200810135522 CN 200810135522 CN 200810135522 A CN200810135522 A CN 200810135522A CN 101355412 B CN101355412 B CN 101355412B
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- 125000004122 cyclic group Chemical group 0.000 claims description 53
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- 238000010586 diagram Methods 0.000 description 20
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Abstract
The invention discloses a method for transmitting a signal, comprising the following steps: a plurality of antenna terminals are divided into three groups, each group comprises a plurality of antenna terminals; the first group of the antenna terminals and the second group of the antenna terminals have the same number of the antenna terminals; reference signals of the plurality of antenna terminals in the third group of the antenna terminals are loaded in the same symbol to be transmitted. Through the method, the transmission for eight antenna reference signals can be realized, thereby improving the whole performance of a system.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a signal transmission method.
Background
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation communication technology, which is one of the core technologies of fourth generation mobile communication. In order to overcome the fading, the channel is divided into a plurality of sub-channels in the frequency domain, the frequency spectrum characteristic of each sub-channel is approximately flat, and the sub-channels of the OFDM are orthogonal to each other, allowing the frequency spectrums of the sub-channels to overlap each other, and the frequency spectrum resources can be utilized to a great extent.
The Multiple-Input Multiple-output (MIMO) technology can increase system capacity, improve transmission performance, and can be well integrated with other physical layer technologies, becoming a key technology of the next Generation (Beyond3-Generation, abbreviated as B3G) and the fourth Generation mobile communication technology (4rd Generation, abbreviated as 4G). However, when the channel correlation is strong, the diversity gain and the multiplexing gain due to the multipath channel are greatly reduced, which causes a large decrease in the performance of the MIMO system. At present, a new MIMO precoding method is proposed, which is an efficient MIMO multiplexing method, and divides an MIMO channel into a plurality of independent virtual channels through precoding processing at a transmitting end and a receiving end, so that the influence of channel correlation can be effectively eliminated, and the stable performance of an MIMO system under various environments is ensured.
A Long Term Evolution (Long Term Evolution, LTE for short) system is an important project of the third generation partnership organization, and fig. 1 illustrates a structural diagram of a basic frame structure of the LTE system, and as shown in fig. 1, the frame structure is divided into four levels of radio frames, half frames, subframes, slots and symbols, wherein a length of one radio frame is 10ms, each radio frame is composed of two half frames, each half frame is 5ms, each half frame is composed of 5 subframes, each subframe is 1ms, one subframe is composed of two slots (slot # 0 and slot #1), and a length of each slot is 0.5 ms.
When the LTE system employs a conventional cyclic prefix, a slot includes 7 uplink/downlink symbols (symbol number l ═ 0, 1, 2,. 6) with a length of 66.7us, wherein the cyclic prefix length of the first symbol is 5.21us, and the cyclic prefix lengths of the remaining 6 symbols are 4.69 us.
When the LTE system employs an extended cyclic prefix, one slot contains 6 uplink/downlink symbols (symbol number l ═ 0, 1, 2,. 5) with a length of 66.7us, where each symbol has a cyclic prefix length of 16.67 us.
Fig. 2 shows a schematic diagram of a Resource block structure when the bandwidth of an LTE system is 5MHz, and as shown in fig. 2, one Resource Element (RE for short) is one subcarrier in one OFDM symbol, and one downlink Resource block is composed of 12 continuous subcarriers in a frequency domain and is composed of 7 (in a conventional cyclic prefix structure) or 6 (in an extended cyclic prefix structure) OFDM symbols in a time domain, that is, one downlink Resource block occupies 180kHz in the frequency domain and is the time length of one general slot in the time domain, and when Resource allocation is performed, Resource blocks are allocated as a basic unit.
In an OFDM system, a MIMO technology is adopted, a base station can support application of at most 8 antennas, and accordingly, a reference signal also needs to support a scenario of 8 antennas, and in order to better apply the MIMO technology, the reference signal used for spatial channel estimation needs to be redesigned.
Disclosure of Invention
The present invention has been made in view of the problem that the prior art has no specific solution to the problem of the transmission method of the 8-antenna reference signal in the related art, and for this reason, the main object of the present invention is to provide a signal transmission method to solve the above problem.
According to an aspect of the present invention, a signal transmission method is provided.
The signal transmission method according to the present invention includes: dividing a plurality of antenna ports into 3 groups, wherein each group comprises a plurality of antenna ports, and the number of the antenna ports in the first antenna port group is the same as that of the antenna ports in the second antenna port group; and carrying the reference signals of the plurality of antenna ports in the third antenna port group in the same symbol and transmitting.
Further, the method further comprises: for a symbol carrying a reference signal of a first antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers; for a symbol carrying a reference signal of a second antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers; for the symbol carrying the reference signal of the third antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 12 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in the adjacent time domain symbol in the frequency domain is 3 subcarriers or 6 subcarriers.
The operation of loading the reference signals of the multiple antenna ports in the third antenna port group in the same symbol is specifically as follows: for a subframe adopting a conventional cyclic prefix, carrying reference signals of a plurality of antenna ports in a third antenna port group on symbols numbered 2 and/or 5 in each time slot; for a subframe employing an extended cyclic prefix, reference signals for a plurality of antenna ports in the third antenna port group are carried on symbols numbered 2 and/or 4 per slot.
The operation of loading the reference signals of the multiple antenna ports in the first antenna port group in the same symbol is specifically as follows: for a subframe adopting a conventional cyclic prefix, bearing reference signals of a plurality of antenna ports in a first antenna port group on symbols with the number of each time slot being 0 and 4; for a subframe employing an extended cyclic prefix, reference signals for a plurality of antenna ports in the first antenna port group are carried on symbols numbered 0 and 3 per slot.
Wherein the loading the reference signals of the plurality of antenna ports in the second antenna port group in the same symbol includes: the reference signals for the plurality of antenna ports in the second antenna port group are carried on symbols numbered 1 per slot.
Specifically, for a subframe using a conventional cyclic prefix, the number of symbols of each slot is 0, 1, 2, 3, 4, 5, and 6 in sequence; for a subframe with an extended cyclic prefix, the symbols of each slot are numbered 0, 1, 2, 3, 4, 5 in sequence.
Preferably, the method further comprises: and determining the frequency domain initial position of the reference signal of each antenna port according to the cell identification.
Further, the method further comprises: setting the position of the reference signal corresponding to the first antenna port group and the position of the reference signal corresponding to the second antenna port group as cell-specific, and setting the position of the reference signal corresponding to the third antenna port group as user-specific; or setting the position of the reference signal corresponding to the first antenna port group, the position of the reference signal corresponding to the second antenna port group and the position of the reference signal corresponding to the third antenna port group as cell-specific.
The cell-specific means that each resource block of a symbol carries a reference signal of an antenna port; the user-specific means that a reference signal of an antenna port is carried on a time-frequency resource where a user physical downlink shared channel is located.
According to an aspect of the present invention, a signal transmission method is provided.
The signal transmission method according to the present invention includes: dividing 8 antenna ports into 3 antenna port groups, wherein the first antenna port group comprises 2 antenna ports, the second antenna port group comprises 2 antenna ports, and the third antenna port group comprises 4 antenna ports; for each antenna port group, respectively bearing the reference signals of the antenna ports in the antenna port group in the same symbol; for a symbol carrying a reference signal of a first antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers; for a symbol carrying a reference signal of a second antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers; for a symbol carrying a reference signal of a third antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 12 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers or 6 subcarriers;
for each antenna port group, the operation of respectively carrying the reference signals of the antenna ports in the same symbol is specifically as follows: for the first antenna port group, under the condition of adopting a conventional cyclic prefix, carrying reference signals of 2 antenna ports on symbols with the number of 0 and 4 in each time slot; under the condition of adopting the extended cyclic prefix, bearing the reference signals of 2 antenna ports on the symbols with the serial numbers of 0 and 3 in each time slot; for the second antenna port group, carrying the reference signals of 2 antenna ports thereof on the symbol numbered 1 of each time slot; for the third antenna port group, under the condition of adopting the conventional cyclic prefix, carrying the reference signals of 4 antenna ports on the symbols with the number of each time slot being 2 and/or 5; in case of using extended cyclic prefix, the reference signals of its 4 antenna ports are carried on symbols numbered 2 and/or 4 per slot.
Preferably, for a subframe employing a normal cyclic prefix, the number of each slot symbol is 0, 1, 2, 3, 4, 5, 6; for a subframe with an extended cyclic prefix, the number of symbols of each slot is 0, 1, 2, 3, 4, 5.
Further, the method further comprises: and determining the frequency domain initial position of the reference signal of each antenna port according to the cell identification.
Preferably, the method further comprises: setting the position of the reference signal corresponding to the first antenna port group and the position of the reference signal corresponding to the second antenna port group as cell-specific, and setting the position of the reference signal corresponding to the third antenna port group as user-specific; or setting the position of the reference signal corresponding to the first antenna port group, the position of the reference signal corresponding to the second antenna port group and the position of the reference signal corresponding to the third antenna port group as cell-specific.
In addition, the method further comprises: cell-specific means that each resource block of a symbol carries a reference signal of an antenna port; the user-specific means that a reference signal of an antenna port is carried on a time-frequency resource where a user physical downlink shared channel is located.
Specifically, the process of dividing 8 antenna ports into 3 antenna port groups includes: setting antenna port numbers corresponding to 8 antenna ports as 0, 1, 2, 3, 4, 5, 6 and 7 respectively, wherein the first antenna port group comprises antenna ports with antenna port numbers of 0 and 1, the second antenna port group comprises antenna ports with antenna port numbers of 2 and 3, and the third antenna port group comprises antenna ports with antenna port numbers of 4, 5, 6 and 7; or, the antenna port numbers corresponding to the 8 antenna ports are set to be 0, 1, 2, 3, 6, 7, 8 and 9 respectively, wherein the first antenna port group includes the antenna ports with the antenna port numbers of 0 and 1, the second antenna port group includes the antenna ports with the antenna port numbers of 2 and 3, and the third antenna port group includes the antenna ports with the antenna port numbers of 6, 7, 8 and 9.
Through at least one technical scheme of the invention, the transmission of the 8-antenna reference signal can be realized, so that the overall performance of the system is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a structural diagram of a basic frame structure of an LTE system according to the related art;
fig. 2 is a schematic diagram of a resource block structure when a bandwidth of an LTE system is 5MHz according to the related art;
fig. 3 is a flow chart of a signal transmission method according to a first embodiment of the method of the present invention;
fig. 4 is a flow chart of a signaling method according to a second embodiment of the method of the invention;
FIG. 5(A) is a schematic diagram of example one of the methods shown in FIG. 4;
FIG. 5(B) is a schematic diagram of example one of the methods shown in FIG. 4;
FIG. 6(A) is a schematic diagram of example two of the method shown in FIG. 4;
FIG. 6(B) is a schematic diagram of example two of the method shown in FIG. 4;
FIG. 7(A) is a schematic diagram of example three of the method shown in FIG. 4;
FIG. 7(B) is a schematic diagram of example three of the method shown in FIG. 4;
FIG. 8(A) is a schematic diagram of example four of the method shown in FIG. 4;
fig. 8(B) is a schematic diagram of example four of the method shown in fig. 4.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Method embodiment one
According to an embodiment of the present invention, a signal transmission method is provided.
Fig. 3 is a flowchart of a signal transmission method according to an embodiment of the present invention, as shown in fig. 3, the method including the steps of:
step S302, dividing a plurality of antenna ports into 3 groups, wherein each group comprises a plurality of antenna ports, the number of the antenna ports of the first antenna port group is the same as that of the antenna ports of the second antenna port group, and is different from that of the antenna ports of the third antenna port group, and the frequency domain initial position of the reference signal of each antenna port can be determined according to the cell identifier;
step S304, carrying the reference signals of a plurality of antenna ports in a third antenna port group in the same symbol and sending the reference signals, wherein the interval of the reference signals belonging to the same antenna port on the same symbol on the frequency domain is 12 subcarriers, the interval of the reference signals on different antenna ports on the frequency domain is 3 subcarriers, and the interval of the reference signals belonging to the same antenna port in adjacent symbols of the time domain on the frequency domain is 3 or 6 subcarriers;
before implementing the embodiment of the invention, the symbols of each time slot in the sub-frame need to be numbered, and for the sub-frame adopting the conventional cyclic prefix, the symbols of each time slot of the sub-frame are numbered 0, 1, 2, 3, 4, 5 and 6 in sequence; for a subframe employing an extended cyclic prefix, the symbols of each slot of the subframe are numbered 0, 1, 2, 3, 4, 5 in sequence.
The following describes the manner of setting the reference signals in the above three antenna port groups.
The method comprises the steps that reference signals of a plurality of antenna ports in a first antenna port group are all carried in the same symbol, the interval of the reference signals belonging to the same antenna port on the same symbol on a frequency domain is 12 subcarriers, the interval of the reference signals on different antenna ports on the same symbol on the frequency domain is 3 subcarriers, and the interval of the reference signals belonging to the same antenna port in adjacent symbols of a time domain on the frequency domain is 3 subcarriers;
the reference signals of a plurality of antenna ports in the second antenna port group are all carried in the same symbol, the interval of the reference signals belonging to the same antenna port on the same symbol on the frequency domain is 6 subcarriers, the interval of the reference signals on different antenna ports on the same symbol on the frequency domain is 3 subcarriers, and the interval of the reference signals belonging to the same antenna port in adjacent symbols of the time domain on the frequency domain is 3 subcarriers;
and bearing the reference signals of the multiple antenna ports in the third antenna port group in the same symbol, wherein the interval of the reference signals belonging to the same antenna port in the same symbol on the frequency domain is 12 subcarriers, the interval of the reference signals belonging to different antenna ports in the same symbol on the frequency domain is 3 subcarriers, and the interval of the reference signals belonging to the same antenna port in adjacent time domain symbols on the frequency domain is 3 subcarriers or 6 subcarriers.
For a first antenna port group, in the case of using a conventional cyclic prefix, reference signals of multiple antenna ports in the group may be carried on symbols numbered 0 and 4 in each timeslot; in the case of an extended cyclic prefix, the reference signals for the multiple antenna ports in the group may be carried on symbols numbered 0 and 3 per slot.
For the second antenna port group, the reference signals for the multiple antenna ports in the group may be carried on the symbol numbered 1 per slot.
For a third antenna port group, in case of employing a conventional cyclic prefix, reference signals of multiple antenna ports in the group may be carried on symbols numbered 2 and/or 5 per slot; in the case of an extended cyclic prefix, the reference signals for the multiple antenna ports in the group may be carried on symbols numbered 2 and/or 4 per slot.
In addition, the antenna port group may be respectively configured to be cell-specific or user-specific, where the cell-specific indicates that each resource block of the symbol carries a reference signal of the antenna port, and the user-specific indicates that the reference signal of the antenna port is only carried on a time-frequency resource where a user physical downlink shared channel is located, and each resource block of the symbol carries the reference signal of the antenna port, and specifically, the method may include the following two setting methods:
the first method is as follows: setting the position of the reference signal corresponding to the first antenna port group and the position of the reference signal corresponding to the second antenna port group as cell-specific, and setting the position of the reference signal corresponding to the third antenna port group as user-specific;
the second method comprises the following steps: and setting the position of the reference signal corresponding to the first antenna port group, the position of the reference signal corresponding to the second antenna port group and the position of the reference signal corresponding to the third antenna port group as cell-specific.
It should be noted that the frequency domain interval includes one end reference signal, for example, R0And R1The interval between the frequency domains is 3 subcarriers including R0Or R1In the inner space.
Method embodiment two
According to an embodiment of the present invention, a signal transmission method is provided.
Fig. 4 is a flowchart of a signal transmission method according to an embodiment of the present invention, as shown in fig. 4, the method including the steps of:
step S402, dividing 8 antenna ports into 3 antenna port groups, wherein the first antenna port group comprises 2 antenna ports, the second antenna port group comprises 2 antenna ports, and the third antenna port group comprises 4 antenna ports;
step S404, for each antenna port group, respectively bearing the reference signal of the antenna port in the same symbol, wherein the frequency domain initial position of the reference signal of each antenna port can be determined according to the cell identifier;
step S406, for the first and second antenna port groups, the interval of the reference signal belonging to the same antenna port on the same symbol on the frequency domain is 6 subcarriers, the interval of the reference signal belonging to the same antenna port on the same symbol on the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in the adjacent symbols of the time domain on the frequency domain is 3 subcarriers; for the third antenna port group, the interval of the reference signals belonging to the same antenna port on the same symbol on the frequency domain is 12 subcarriers, the interval of the reference signals belonging to different antenna ports on the same symbol on the frequency domain is 3 subcarriers, and the interval of the reference signals belonging to the same antenna port in the adjacent symbols of the time domain on the frequency domain is 3 or 6 subcarriers;
by the technical scheme provided by the embodiment of the invention, the method for sending the reference signal of the 8-antenna port can be realized, so that the overall performance of the system is improved.
Before implementing the embodiment of the present invention, symbols of each slot in a subframe need to be numbered, and a specific numbering method thereof is the same as that in the first embodiment of the method, and is not described herein again.
For each antenna port group, the specific operation of respectively carrying the reference signals of the antenna ports in the same symbol is as follows: for the first antenna port group, in the case of adopting the conventional cyclic prefix, the reference signals of 2 antenna ports thereof may be carried on the symbols numbered 0 and 4 of each timeslot; in the case of using the extended cyclic prefix, reference signals of 2 antenna ports thereof may be carried on symbols numbered 0 and 3 per slot; for the second antenna port group, bearing the reference signals of 2 antenna ports on the symbol with the number of 1 in each time slot; for the third antenna port group, in case of adopting the conventional cyclic prefix, the reference signals of its 4 antenna ports may be carried on the symbols numbered 2 and/or 5 per timeslot; in case of using extended cyclic prefix, the reference signals of its 4 antenna ports can be carried on symbols numbered 2 and/or 4 per slot.
In addition, the antenna port group may be set to be cell-specific or user-specific, and the specific setting method is the same as the first method embodiment, which is not described herein again.
Moreover, the setting mode of the antenna port number may include the following two modes:
in a first mode, antenna port numbers corresponding to 8 antenna ports are respectively set to be 0, 1, 2, 3, 4, 5, 6 and 7, wherein a first antenna port group comprises antenna ports with antenna port numbers of 0 and 1, a second antenna port group comprises antenna ports with antenna port numbers of 2 and 3, and a third antenna port group comprises antenna ports with antenna port numbers of 4, 5, 6 and 7; or
Mode two, set up the antenna port number that 8 antenna ports correspond and be 0, 1, 2, 3, 6, 7, 8, 9 respectively, wherein, first antenna port group contains the antenna port number and is 0 and 1 antenna port, and second antenna port group contains the antenna port number and is 2 and 3 antenna port, and third antenna port group contains the antenna port number and is 6, 7, 8, 9 antenna port.
The following describes an embodiment of the present invention by taking a 3GPP LTE (5 MHz wide) system as an example, where the system includes 512 subcarriers, where the number of available subcarriers is 300 in the middle, and each resource block includes 12 consecutive subcarriers, and thus the 5M bandwidth system has 25 resource blocks in total.
The present invention is described with an example in which the total number of antenna ports is 8 antenna ports, where each antenna port corresponds to a reference signal, 8 antenna ports correspond to antenna ports with numbers 0, 1, 2, 3, 4, 5, 6, and 7, respectively, where a first antenna port group includes antenna ports with numbers 0 and 1, a second antenna port group includes antenna ports with numbers 2 and 3, a third antenna port group includes antenna ports with numbers 4, 5, 6, and 7, and reference signals of the 8 antenna ports are { R ″, respectively0，R1，R2，R3，R4，R5，R6，R7Will { R }0，R1，R2，R3，R4，R5，R6，R7Dividing the reference signals into 3 groups, wherein the number of the reference signals contained in each group is unequal, and R is divided into three groups0And R1Dividing into a first group, dividing R2And R3Dividing into a second group, dividing R4、R5、R6And R7And divided into a third group.
According to the above division method, each of the first antenna port groupsReference signals on the root antenna port are carried on the same symbol, the interval of the reference signals belonging to the same antenna port on the same symbol on a frequency domain is 6 subcarriers, and the frequency domain interval of adjacent reference signals of different adjacent antenna ports is 3 subcarriers; on the adjacent symbol of the time domain bearing the reference signal of the antenna port group, the interval of the reference signal belonging to the same antenna port on the frequency domain is 3 subcarriers; wherein, reference signals of 2 antenna ports are carried in one symbol, and R is R under the condition that the total number of the antenna ports is 80，R1R carried in same symbol and adjacent to same symbol0And R1Is 3 subcarriers, adjacent R0/R1The interval of the frequency domain is 6 sub-carriers; time domain adjacent bearer R0，R1On the symbol of (A), R adjacent on different symbols0/R1The frequency domain interval between them is 3 subcarriers.
The reference signal of each antenna port in the second antenna port group is carried on the same symbol, the interval of the reference signal belonging to the same antenna port on the same symbol on the frequency domain is 6 subcarriers, and the frequency domain interval of the adjacent reference signal of the adjacent different antenna ports is 3 subcarriers; the interval of the reference signals belonging to the same antenna port on the adjacent symbols of the time domain bearing the reference signals of the antenna port group on the frequency domain is 3 subcarriers; wherein, reference signals of 2 antenna ports are carried in one symbol, and R is R under the condition that the total number of the antenna ports is 82，R3Carried in the same symbol and on the same symbol, adjacent R2And R3Is 3 subcarriers, adjacent R2/R3The interval of the frequency domain is 6 sub-carriers; time domain adjacent bearer R2，R3On the symbol of (A), R adjacent on different symbols2/R3The frequency domain interval between them is 3 subcarriers.
The reference signals of each antenna port in the third antenna port group are carried on the same symbol, and the reference signals belonging to the same antenna port on the same symbol are in the frequency domainEvery 12 subcarriers, the frequency domain interval of the adjacent reference signals of the adjacent different antenna ports is 3 subcarriers; the interval of the reference signals belonging to the same antenna port on the adjacent symbols of the time domain bearing the reference signals of the antenna port group on the frequency domain is 3 or 6 sub-carriers; wherein, reference signals of 4 antenna ports are carried in one symbol, and R is R under the condition that the total number of the antenna ports is 84，R5，R6，R7Carried in the same symbol and on the same symbol, adjacent R4And R5(or R)5And R6Or R is6And R7Or R is4And R7) Is 3 subcarriers, adjacent R4/R5/R6/R7The interval of the frequency domain is 12 sub-carriers; time domain adjacent bearer R4，R5，R6，R7On the symbol of (A), R adjacent on different symbols4/R5/R6/R7The frequency domain interval between them is 3 or 6 subcarriers.
Example one
Fig. 5(a) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs a normal cyclic prefix, and fig. 5(B) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs an extended cyclic prefix.
As shown in FIG. 5(A), reference signal { R) for the first antenna port group0，R1}：
R is to be0Carrying on the kth subcarrier and the (k + 6) th subcarrier of each resource block of a symbol with each slot number of 0, wherein k is equal to {0, 1, 2, 3, 4, 5 };
r is to be0Also carried on the (k + 3) th and mth subcarriers of each resource block of the symbol with slot number 4, where m ═ k +9) mod12, k is as above;
r is to be1Each resource block carrying a symbol numbered 0 in each slotOn the (k + 3) th subcarrier and the (m) th subcarrier, where m is (k +9) mod12, k is as above;
r is to be1The carrier is also carried on the kth subcarrier and the kth +6 subcarrier of each resource block of a symbol with the number of each time slot being 4, and k is the same as the above;
reference signal for the second antenna port group { R2，R3}：
R is to be2Carried on the kth and k +6 subcarriers of each resource block of slot # 0 symbol numbered 1, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be2Also carried on the k +3 th and mth subcarriers of each resource block of slot # 1 symbol numbered 1, where m ═ k +9) mod12, k is as above;
r is to be3Carried on the (k + 3) th and mth subcarriers of each resource block of slot # 0 symbol numbered 1, where m ═ k +9) mod12, k being as above;
r is to be3The carrier is also carried on the kth subcarrier and the kth +6 subcarrier of each resource block of the symbol with the number of 1 in the time slot # 1, and k is the same as the above;
reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of slot # 0 symbol numbered 2, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, and k is the same as above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be5The m-th resource block of each resource block also carrying the symbol numbered 2 in slot #1On subcarriers, where m ═ k +9) mod12, k is as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be6Is also carried on the kth subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, k is the same as above;
r is to be7On the mth subcarrier of each resource block of slot # 0 symbol numbered 2, where m ═ k +9) mod12, k being as above;
r is to be7And is also carried on the (k + 3) th subcarrier of each resource block of the slot # 1 symbol numbered 2, k being as above.
As shown in FIG. 5(B), reference signal { R) for the first antenna port group0，R1}：
R is to be0Carrying on the kth subcarrier and the (k + 6) th subcarrier of each resource block of a symbol with each slot number of 0, wherein k is equal to {0, 1, 2, 3, 4, 5 };
r is to be0Is also carried on the (k + 3) th and mth subcarriers of each resource block of the symbol with slot number 3, where m ═ k +9) mod12, k is as above;
r is to be1Is carried on the (k + 3) th subcarrier and the m-th subcarrier of each resource block with each slot number of 0 symbol, wherein m is (k +9) mod12, and k is the same as above;
r is to be1The carrier is also carried on the kth subcarrier and the kth +6 subcarrier of each resource block of a symbol with the number of each time slot being 3, and k is the same as the above;
reference signal for the second antenna port group { R2，R3}：
R is to be2Carried on the kth and k +6 th subcarriers of each resource block of slot # 0, symbol numbered 1, where k e {0, 1, 2, 3,4，5}；
r is to be2Also carried on the k +3 th and mth subcarriers of each resource block of slot # 1 symbol numbered 1, where m ═ k +9) mod12, k is as above;
r is to be3Carried on the (k + 3) th and mth subcarriers of each resource block of slot # 0 symbol numbered 1, where m ═ k +9) mod12, k being as above;
r is to be3The carrier is also carried on the kth subcarrier and the kth +6 subcarrier of each resource block of the symbol with the number of 1 in the time slot # 1, and k is the same as the above;
reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of slot # 0 symbol numbered 2, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, k is the same as above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be5Also carried on the mth subcarrier of each resource block of slot # 1 symbol numbered 2, where m ═ k +9) mod12, k is as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be6Is also carried on the kth subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, k is the same as above;
r is to be7On the mth subcarrier of each resource block of slot # 0 symbol numbered 2, where m ═ k +9) mod12, k being as above;
r is to be7And is also carried on the (k + 3) th subcarrier of each resource block of the slot # 1 symbol numbered 2, k being as above.
Example two
Fig. 6(a) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs a normal cyclic prefix, and fig. 6(B) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs an extended cyclic prefix.
As shown in fig. 6(a), in this embodiment, the position of the first antenna port group reference signal and the position of the second antenna port group reference signal in fig. 6(a) are the same as those in fig. 5(a), and are not described again here.
Reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of slot # 0 symbol numbered 5, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 5, and k is the same as above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 5, and k is the same as the above;
r is to be5Also carried on the mth subcarrier of each resource block of slot # 1 symbol numbered 5, where m ═ k +9) mod12, k is as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 5, and k is the same as the above;
r is to be6Is also carried on the kth sub-carrier of each resource block of the symbol with the number of 5 of the time slot # 1, k is the same as above;
r is to be7Each carrying a symbol numbered 5 in slot #0On the mth subcarrier of the resource block, where m ═ k +9) mod12, k being as above;
r is to be7And is also carried on the (k + 3) th subcarrier of each resource block of the symbol numbered 5 in slot # 1, k being as above.
As shown in fig. 6(B), in this embodiment, the position of the first antenna port group reference signal and the position of the second antenna port group reference signal in fig. 6(B) are the same as those in fig. 5(B), and are not described again here.
Reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of slot # 0 symbol numbered 4, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 4, and k is the same as above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of 4 of the time slot # 0, and k is the same as the above;
r is to be5Also carried on the mth subcarrier of each resource block of slot # 1 symbol numbered 4, where m ═ k +9) mod12, k is as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of 4 of the time slot # 0, and k is the same as the above;
r is to be6Is also carried on the kth subcarrier of each resource block of the symbol with the number of 4 of the time slot # 1, k is the same as above;
r is to be7Carried on the mth subcarrier of each resource block of slot # 0 symbol numbered 4, where m ═ k +9) mod12, k is as above;
r is to be7And is also carried on the (k + 3) th subcarrier of each resource block of the symbol numbered 4 in slot # 1, k being as above.
Example three
Fig. 7(a) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs a normal cyclic prefix, and fig. 7(B) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs an extended cyclic prefix.
As shown in fig. 7(a), in this embodiment, the position of the first antenna port group reference signal and the position of the second antenna port group reference signal in fig. 7(a) are the same as those in fig. 5(a), and are not described again here.
Reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of symbols with each slot number 2, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4The carrier is also loaded on the (k + 6) th subcarrier of each resource block of the symbol with the number of each time slot being 5, and k is the same as the above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of each time slot being 2, and k is the same as the above;
r is to be5Also carried on the m-th sub-carrier of each resource block of symbol with slot number 5, where m ═ k +9) mod12, k is as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of each time slot being 2, and k is the same as the above;
r is to be6The carrier is also carried on the kth subcarrier of each resource block of a symbol with the number of each time slot being 5, and k is the same as the k;
r is to be7Carried on the m-th subcarrier of each resource block of symbol with slot number 2, where m ═ k +9) mod12, k is as above;
r is to be7And is also carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of 5 in each slot, k being the same as above.
As shown in fig. 7(B), in this embodiment, the position of the first antenna port group reference signal and the position of the second antenna port group reference signal in fig. 7(B) are the same as those in fig. 5(B), and are not described again here.
Reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of symbols with each slot number 2, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4The carrier is also carried on the (k + 6) th subcarrier of each resource block of a symbol with the number of each time slot being 4, and k is the same as the above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of each time slot being 2, and k is the same as the above;
r is to be5Also carried on the m-th sub-carrier of each resource block of symbol with slot number 4, where m ═ k +9) mod12, k is as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of each time slot being 2, and k is the same as the above;
r is to be6The carrier is also carried on the kth subcarrier of each resource block of a symbol with the number of each time slot being 4, and k is the same as the k;
r is to be7Carried on the m-th subcarrier of each resource block of symbol with slot number 2, where m ═ k +9) mod12, k is as above;
r is to be7The carrier is also loaded on the (k + 3) th subcarrier of each resource block of a symbol with the number of each time slot being 4, and k is the same as the above;
example four
Fig. 8(a) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs a normal cyclic prefix, and fig. 8(B) is a schematic diagram of a location of a reference signal carrying 8 antenna ports in one resource block when the system employs an extended cyclic prefix.
As shown in fig. 8(a), in this embodiment, the position of the first antenna port group reference signal and the position of the second antenna port group reference signal in fig. 8(a) are the same as those in fig. 5(a), and are not described again here.
Reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of the symbol numbered 2 of slot # 0, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 5, and k is the same as above;
r is to be4Is also carried on the (k + 3) th subcarrier of each resource block of the symbol numbered 2 of the slot # 1, k being as above;
r is to be4Also carried on the mth subcarrier of each resource block of slot # 1 symbol numbered 5, where m ═ k +9) mod12, k is as above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be5Also carried on the mth subcarrier of each resource block of slot # 0, symbol number 5, where m ═ k +9) mod12, k is as above;
r is to be5Is also carried on the kth subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, k is the same as above;
r is to be5Also carrying the k +6 th sub-carrier of each resource block of the symbol numbered 5 in slot #1On wave, k is as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be6Is also carried on the kth subcarrier of each resource block of the symbol with the number of 5 of the time slot # 0, k is the same as above;
r is to be6Also carried on the mth subcarrier of each resource block of slot # 1 symbol numbered 2, where m ═ k +9) mod12, k is as above;
r is to be6Is also carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 5, and k is the same as above;
r is to be7On the mth subcarrier of each resource block of slot # 0 symbol numbered 2, where m ═ k +9) mod12, k being as above;
r is to be7Is also carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 5, and k is the same as above;
r is to be7Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, and k is the same as above;
r is to be7But also on the kth subcarrier of each resource block which also carries the symbol numbered 5 in slot # 1, k being as above.
As shown in fig. 8(B), in this embodiment, the position of the first antenna port group reference signal and the position of the second antenna port group reference signal in fig. 8(B) are the same as those in fig. 5(B), and are not described again here.
Reference signal for third antenna port set R4，R5，R6，R7}：
R is to be4Carried on the kth subcarrier of each resource block of the symbol numbered 2 of slot # 0, where k ∈ {0, 1, 2, 3, 4, 5 };
r is to be4Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 4, and k is the same as above;
r is to be4Is also carried on the (k + 3) th subcarrier of each resource block of the symbol numbered 2 of the slot # 1, k being as above;
r is to be4Also carried on the mth subcarrier of each resource block of slot # 1 symbol numbered 4, where m ═ k +9) mod12, k is as above;
r is to be5The carrier is carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be5Also carried on the mth subcarrier of each resource block of slot # 0, symbol number 4, where m ═ k +9) mod12, k is as above;
r is to be5Is also carried on the kth subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, k is the same as above;
r is to be5Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 4, and k is the same as above;
r is to be6The carrier is carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 2, and k is the same as the above;
r is to be6Is also carried on the kth subcarrier of each resource block of the symbol with the number of 4 of the time slot # 0, k is the same as above;
r is to be6Also carried on the mth subcarrier of each resource block of slot # 1 symbol numbered 2, where m ═ k +9) mod12, k is as above;
r is to be6Is also carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 4, and k is the same as the above;
r is to be7On the mth subcarrier of each resource block of slot # 0 symbol numbered 2, where m ═ k +9) mod12, k being as above;
r is to be7Is also carried on the (k + 3) th subcarrier of each resource block of the symbol with the number of the time slot # 0 being 4, and k is the same as the above;
r is to be7Is also carried on the (k + 6) th subcarrier of each resource block of the symbol with the number of the time slot # 1 being 2, and k is the same as above;
r is to be7But also on the kth subcarrier of each resource block which also carries the symbol numbered 4 in slot # 1, k being as above.
It should be noted that, in the above embodiments of the present invention, the frequency domain initial position of the reference signal is set to k equal to 0 as an example, but the present invention is not limited thereto, and the frequency domain initial position is the same as the processing method of k equal to 0 when the frequency domain initial position is other values, and is not described herein again, and the frequency domain initial position is still within the protection scope of the present invention when the frequency domain initial position is other values.
As described above, by the signal transmission method provided by the present invention, transmission of 8-antenna reference signals can be realized, thereby improving the overall performance of the system.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (13)
1. A signal transmission method, comprising:
dividing a plurality of antenna ports into 3 groups, wherein each group comprises a plurality of antenna ports, and the number of the antenna ports in the first antenna port group is the same as that of the antenna ports in the second antenna port group;
carrying the reference signals of a plurality of antenna ports in the third antenna port group in the same symbol and sending the reference signals;
wherein the method further comprises:
for a symbol carrying a reference signal of a first antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers;
for a symbol carrying a reference signal of a second antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers;
for the symbol carrying the reference signal of the third antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 12 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in the adjacent time domain symbol in the frequency domain is 3 subcarriers or 6 subcarriers.
2. The method of claim 1, wherein the carrying the reference signals of the antenna ports in the third antenna port group in the same symbol comprises:
for a subframe adopting a conventional cyclic prefix, carrying reference signals of a plurality of antenna ports in the third antenna port group on symbols numbered 2 and/or 5 in each time slot;
for a subframe adopting an extended cyclic prefix, bearing reference signals of a plurality of antenna ports in the third antenna port group on symbols numbered 2 and/or 4 in each time slot;
for the sub-frame adopting the conventional cyclic prefix, the number of the symbol of each time slot is 0, 1, 2, 3, 4, 5 and 6 in sequence;
for a subframe with an extended cyclic prefix, the symbols of each slot are numbered 0, 1, 2, 3, 4, 5 in sequence.
3. The method of claim 1, wherein carrying the reference signals of the plurality of antenna ports in the first antenna port group in the same symbol comprises:
for a subframe adopting a conventional cyclic prefix, carrying reference signals of a plurality of antenna ports in the first antenna port group on symbols with the number of each time slot being 0 and 4;
for a subframe employing an extended cyclic prefix, carrying reference signals of a plurality of antenna ports in the first antenna port group on symbols numbered 0 and 3 per slot.
4. The method of claim 1, wherein the loading the reference signals of the plurality of antenna ports in the second antenna port group in the same symbol comprises:
the reference signals of the plurality of antenna ports in the second antenna port group are carried on a symbol with a time slot number of 1.
5. The method according to any one of claims 1, 3, 4,
for a subframe adopting a conventional cyclic prefix, the number of symbols of each time slot is 0, 1, 2, 3, 4, 5 and 6 in sequence;
for a subframe with an extended cyclic prefix, the symbols of each slot are numbered 0, 1, 2, 3, 4, 5 in sequence.
6. The method according to any one of claims 1 to 4, further comprising:
and determining the frequency domain initial position of the reference signal of each antenna port according to the cell identification.
7. The method according to any one of claims 1 to 4, further comprising:
setting the position of the reference signal corresponding to the first antenna port group and the position of the reference signal corresponding to the second antenna port group as cell-specific, and setting the position of the reference signal corresponding to the third antenna port group as user-specific; or
Setting the position of the reference signal corresponding to the first antenna port group, the position of the reference signal corresponding to the second antenna port group and the position of the reference signal corresponding to the third antenna port group as cell-specific;
wherein the cell-specific means that each resource block of the symbol carries a reference signal of the antenna port;
the user exclusive refers to that the reference signal of the antenna port is borne on the time frequency resource where the user physical downlink shared channel is located.
8. A signal transmission method, comprising:
dividing 8 antenna ports into 3 antenna port groups, wherein the first antenna port group comprises 2 antenna ports, the second antenna port group comprises 2 antenna ports, and the third antenna port group comprises 4 antenna ports;
for each antenna port group, respectively bearing the reference signals of the antenna ports in the antenna port group in the same symbol;
for a symbol carrying a reference signal of a first antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers;
for a symbol carrying a reference signal of a second antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 6 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in adjacent time domain symbols in the frequency domain is 3 subcarriers;
for the symbol carrying the reference signal of the third antenna port group, the interval of the reference signal belonging to the same antenna port in the same symbol in the frequency domain is 12 subcarriers, the interval of the reference signal belonging to different antenna ports in the same symbol in the frequency domain is 3 subcarriers, and the interval of the reference signal belonging to the same antenna port in the adjacent time domain symbol in the frequency domain is 3 subcarriers or 6 subcarriers.
9. The method of claim 8, wherein for each antenna port group, respectively carrying the reference signals of the antenna ports in the same symbol specifically comprises:
for the first antenna port group, under the condition of adopting a conventional cyclic prefix, carrying reference signals of 2 antenna ports thereof on symbols with the number of each time slot being 0 and 4; under the condition of adopting the extended cyclic prefix, bearing the reference signals of 2 antenna ports on the symbols with the serial numbers of 0 and 3 in each time slot;
for the second antenna port group, carrying the reference signals of 2 antenna ports thereof on the symbol numbered 1 of each time slot;
for the third antenna port group, carrying reference signals of 4 antenna ports thereof on symbols numbered 2 and/or 5 of each time slot under the condition of adopting a conventional cyclic prefix; under the condition of adopting the extended cyclic prefix, bearing the reference signals of 4 antenna ports on the symbols with the number of each time slot being 2 and/or 4;
for the sub-frame adopting the conventional cyclic prefix, the number of the symbol of each time slot is 0, 1, 2, 3, 4, 5 and 6 in sequence;
for a subframe with an extended cyclic prefix, the symbols of each slot are numbered 0, 1, 2, 3, 4, 5 in sequence.
10. The method of claim 8,
for a subframe adopting a conventional cyclic prefix, the number of each slot symbol is 0, 1, 2, 3, 4, 5 and 6;
for a subframe with an extended cyclic prefix, the number of symbols of each slot is 0, 1, 2, 3, 4, 5.
11. The method according to claim 8 or 9, characterized in that the method further comprises:
and determining the frequency domain initial position of the reference signal of each antenna port according to the cell identification.
12. The method according to claim 8 or 9, characterized in that the method further comprises:
setting the position of the reference signal corresponding to the first antenna port group and the position of the reference signal corresponding to the second antenna port group as cell-specific, and setting the position of the reference signal corresponding to the third antenna port group as user-specific; or
Setting the position of the reference signal corresponding to the first antenna port group, the position of the reference signal corresponding to the second antenna port group and the position of the reference signal corresponding to the third antenna port group as cell-specific;
wherein,
the cell-specific means that each resource block of the symbol carries a reference signal of the antenna port;
the user exclusive refers to that the reference signal of the antenna port is borne on the time frequency resource where the user physical downlink shared channel is located.
13. The method according to claim 8 or 9, wherein the process of grouping 8 antenna ports into 3 antenna port groups comprises:
setting the antenna port numbers corresponding to the 8 antenna ports to be 0, 1, 2, 3, 4, 5, 6 and 7 respectively, wherein the first antenna port group comprises the antenna ports with the antenna port numbers of 0 and 1, the second antenna port group comprises the antenna ports with the antenna port numbers of 2 and 3, and the third antenna port group comprises the antenna ports with the antenna port numbers of 4, 5, 6 and 7; or
Set up the antenna port number that 8 antenna ports correspond is 0, 1, 2, 3, 6, 7, 8, 9 respectively, wherein, first antenna port group contains the antenna port number and is 0 and 1, second antenna port group contains the antenna port number and is 2 and 3, third antenna port group contains the antenna port number and is 6, 7, 8, 9.
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| CN101677304B (en) * | 2008-09-19 | 2012-04-18 | 电信科学技术研究院 | Collocation method of downlink common pilot frequency |
| WO2010085909A1 (en) * | 2009-02-01 | 2010-08-05 | Huawei Technologies Co., Ltd. | Method for transmitting reference signals |
| CN101626620B (en) * | 2009-08-07 | 2014-03-12 | 中兴通讯股份有限公司 | Transmitting method of reference signal |
| CN102223167B (en) * | 2010-04-16 | 2015-11-25 | 华为技术有限公司 | Detection reference signal sending method in multiaerial system and device |
| CN103347298B (en) * | 2012-12-31 | 2019-02-19 | 上海华为技术有限公司 | Reference signal configuration method and reference signal sending method and relevant device |
| CN104468434A (en) * | 2013-09-22 | 2015-03-25 | 中兴通讯股份有限公司 | LTE-based descrambling device and method |
| CN111884963B (en) * | 2015-11-05 | 2021-10-15 | 华为技术有限公司 | Transmission equipment, method and system of reference signal |
| WO2017190361A1 (en) * | 2016-05-06 | 2017-11-09 | 华为技术有限公司 | Reference-signal transmission method and device |
| CN107623542B (en) * | 2016-07-13 | 2023-09-01 | 华为技术有限公司 | Method for transmitting reference signal, related equipment and communication system |
| CN107888360B (en) * | 2016-09-30 | 2020-10-16 | 华为技术有限公司 | Reference signal transmission method, device and system |
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