CN101340227B - Transmitting method and apparatus of downlink reference signal - Google Patents
Transmitting method and apparatus of downlink reference signal Download PDFInfo
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- CN101340227B CN101340227B CN200810135190A CN200810135190A CN101340227B CN 101340227 B CN101340227 B CN 101340227B CN 200810135190 A CN200810135190 A CN 200810135190A CN 200810135190 A CN200810135190 A CN 200810135190A CN 101340227 B CN101340227 B CN 101340227B
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Abstract
The invention discloses a sending method for descending reference signals and a device thereof based on a transmit manner of 8 antennae; the 8 antennae are represented by logic indexes 0-7. The method comprises the following steps: the frequency domain sending position and the time domain sending position of reference signals of the antennae are set; the frequency domain sending position is set as follows: the interval of the reference signals of the same antenna on the same OFDM symbol is 12 REs, and the interval of adjacent reference signals is 3 REs; the interval of two adjacent reference signals in frequency domain of the same antenna of two adjacent OFDM symbols is 6 REs; the time domain sending position is set as follows: the reference signals of the antennae with the logic index being 0 to 3 are on the same OFDM symbol; the reference signals of the antennae with the logic index being 4 to 7 are on the same OFDM symbol; the logic indexes are mapped into interfaces of the antenna, and corresponding antenna reference signals are sent at the interfaces of the antenna. The method and the device can support channel estimation of an 8-antenna system on the premise of ensuring the same cost as that of 4 antennae.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of sending method and device of downlink reference signal.
Background technology
In present LTE (Long-Term Evolution, Long Term Evolution) system, LTE system TDD (Time Division Duplex; Time division duplex) frame structure of pattern is called second type of frame structure (Frame Structure Type2) again, and Fig. 1 is the sketch map according to the frame structure of the LTE system TDD mode of correlation technique, and is as shown in Figure 1; In this frame structure; 10ms (that is, and 307200Ts, radio frames 1ms=30720Ts) is divided into two fields; The long 5ms of each field (that is, 153600Ts).The subframe that it is 1ms that each field comprises 5 length.In addition, upstream or downstream subframe is divided into the time slot of 2 0.5ms again.Each subframe can play different effects, and for example, the D representative is used for the descending sub frame of transmission of downlink signal; The U representative is used to transmit the sub-frame of uplink of upward signal; S represents special subframe, comprises three special time slots: i.e. DwPTS (Downlink Pilot Time Slot, descending pilot frequency time slot), GP (Guard Period; Protection is at interval) and UpPTS (Uplink Pilot TimeSlot, uplink pilot time slot).In real system, on/descending formulatory indices can notify to portable terminal through broadcast.
The frame structure of the FDD of LTE system (Frequency Division Duplex, FDD) pattern is called first kind frame structure (that is, Frame Structure Type1) again, and Fig. 2 is the sketch map according to the frame structure of the LTE system fdd mode of correlation technique; As shown in Figure 2, the radio frames of a 10ms is divided into the time slot of 20 0.5ms, and 2 adjacent time slots are formed the subframe that length is 1ms, promptly; Subframe i is made up of time slot 2i and 2i+1, wherein, and i=0; 1 ..., 9.Under fdd mode, 10 sub-frame all are used for the transmission of upward signal or downstream signal, on/distinguish through different frequency bands between descending.
Resource allocation in the LTE system is a unit with RB (Resource Block, Resource Block), and a RB takies 12 RE (Resource Element on frequency domain; Resource element, a RE takies an OFDM symbol on time domain), a RB takies a time slot on time domain; That is, a RB takies 7 or 6 OFDM (OrthogonalFrequency Division Multiplexing, OFDM) symbol on time domain; That is to say that a RB is under the condition of common CP (Normal Cyclic Prefix, Cyclic Prefix); Take 7 OFDM symbols; Under the condition of expansion CP (Extended Cyclic Prefix, extended cyclic prefix), take 6 OFDM symbols.Fig. 3 is the sketch map according to the Resource Block of correlation technique and resource units relation; As shown in Figure 3; Under the condition of common CP; If the corresponding RB of definition downlink system bandwidth adds up to
, then the index of RB is 0,1; ...,
-1.
In order to improve data rate, the LTE system has used multi-antenna technology, and base station side is supported 4 transmit antennas at most.The follow-up evolution system of LTE system (LTE-Advance system) needs to support higher transmission rate that the antenna number that base station side need be supported reaches 8, therefore needs a kind of pilot design scheme that can support 8 antenna scenes.
Summary of the invention
Propose the present invention to the problem that needs a kind of pilot design scheme that can support 8 antenna scenes in the correlation technique, for this reason, the present invention aims to provide a kind of sending method and device of down-bound pilot frequency signal, to address the above problem.
A kind of sending method of downlink reference signal is provided according to an aspect of the present invention.
According to the sending method of downlink reference signal of the present invention, based on 8 antenna radiation patterns, 8 antennas represent that with logic index 0-7 said method comprises respectively: the frequency domain that the reference signal of antenna is set sends position and time domain transmission position; Wherein, sending the position for frequency domain is provided with in such a way: confirm the initial position of the reference signal of every antenna at frequency domain according to cell ID; On same OFDM symbol, the reference signal of the same antenna is set to 12 resource elements, the reference signal of adjacent two antennas is set to 3 resource elements; On two adjacent OFDM symbols of the reference signal of sending identical antenna; The same antenna two adjacent reference signals on frequency domain are set to 6 resource elements; Wherein, Reference signal is spaced apart n and is meant between the shared resource element of two reference signals that n-1 resource element arranged, and the value of n is one of following: 3,6,12; Sending the position for time domain is provided with in such a way: the reference signal that with the logic index is 0,1,2,3 antenna is arranged on the same OFDM symbol; The reference signal that with the logic index is 4,5,6,7 antenna is arranged on the same OFDM symbol; The logic index is mapped to antenna port, and sends the corresponding antenna reference signal at antenna port.
A kind of dispensing device of downlink reference signal is provided according to another aspect of the present invention.
According to the dispensing device of downlink reference signal of the present invention, based on 8 antenna radiation patterns, 8 antennas represent that with logic index 0-7 said apparatus comprises respectively: frequency domain is provided with module, and the frequency domain that is used to be provided with the reference signal of antenna sends the position; Wherein, sending the position for frequency domain is provided with in such a way: confirm the initial position of the reference signal of every antenna at frequency domain according to cell ID; On same OFDM symbol, the reference signal of the same antenna is set to 12 resource elements, the reference signal of adjacent two antennas is set to 3 resource elements; On two adjacent OFDM symbols of the reference signal of sending identical antenna; The same antenna two adjacent reference signals on frequency domain are set to 6 resource elements; Wherein, Reference signal is spaced apart n and is meant between the shared resource element of two reference signals that n-1 resource element arranged, and the value of n is one of following: 3,6,12; Time domain is provided with module, and the time domain that is used to be provided with the reference signal of antenna is sent the position; Wherein, sending the position for time domain is provided with in such a way: the reference signal that with the logic index is 0,1,2,3 antenna is arranged on the same OFDM symbol; The reference signal that with the logic index is 4,5,6,7 antenna is arranged on the same OFDM symbol; Mapping block is used for the logic index is mapped to antenna port; Sending module is used for sending the corresponding antenna reference signal at antenna port.
Through the present invention; Employing sends the position through the frequency domain that the antenna reference signal is set and time domain is sent the position; And the logic index is mapped to the method for antenna port; Having solved in the correlation technique needs a kind of problem that can support the pilot design scheme of 8 antenna scenes, and then under the prerequisite that guarantees with the identical expense of 4 antennas, can support the channel estimating of 8 antenna systems.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map according to the frame structure of the LTE system TDD mode of correlation technique;
Fig. 2 is the sketch map according to the frame structure of the LTE system fdd mode of correlation technique;
Fig. 3 is the sketch map according to the Resource Block of correlation technique and resource units relation;
Fig. 4 is the flow chart according to the sending method of the downlink reference signal of the embodiment of the invention;
Fig. 5 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention one;
Fig. 6 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention two;
Fig. 7 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention three;
Fig. 8 is the signal according to the sending method of the downlink reference signal of the embodiment of the invention four
Figure;
Fig. 9 is the signal according to the sending method of the downlink reference signal of the embodiment of the invention five
Figure;
Figure 10 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention six;
Figure 11 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention seven;
Figure 12 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention eight;
Figure 13 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention nine;
Figure 14 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention ten;
Figure 15 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 11;
Figure 16 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 12;
Figure 17 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 13;
Figure 18 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 14;
Figure 19 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 15;
Figure 20 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 16;
Figure 21 is the structured flowchart according to the dispensing device of the downlink reference signal of the embodiment of the invention;
Figure 22 is the preferred structure block diagram according to the dispensing device of the downlink reference signal of the embodiment of the invention one;
Figure 23 is the preferred structure block diagram according to the dispensing device of the downlink reference signal of the embodiment of the invention two.
Embodiment
Functional overview
The present invention has designed 8 new antenna pilot structures, that is, the sending method of pilot signal when 8 antennas are provided (be called reference signal again, Reference Signal abbreviates RS as) is used to support the channel estimating of 8 antennas.Through the present invention, can under the prerequisite that guarantees with the identical expense of 4 antennas, support the channel estimating of 8 antenna systems.
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
Method embodiment
According to embodiments of the invention, a kind of sending method of downlink reference signal is provided, this method is based on 8 antenna radiation patterns, and 8 antennas are represented with logic index 0-7 respectively.Fig. 4 is the flow chart according to the sending method of the downlink reference signal of the embodiment of the invention, and is as shown in Figure 4, and this method comprises:
Step S402, the frequency domain that the reference signal of antenna is set sends position and time domain transmission position;
Step S404 is mapped to antenna port (Antenna Port) with the logic index, and sends the corresponding antenna reference signal at antenna port.
To the concrete implementation procedure of this method be described in detail below.
In step S402, send the position for frequency domain and be provided with in such a way:
(20) confirm the initial position of the reference signal of every antenna according to cell ID (ID) at frequency domain.
(22) on same OFDM symbol, the reference signal of the same antenna is set to 12 RE, the reference signal of adjacent two antennas is set to 3 RE.
(24) on two adjacent OFDM symbols of the reference signal of sending identical antenna, the same antenna two adjacent reference signals on frequency domain are set to 6 RE.
Particularly, sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, the same antenna two adjacent reference signals on frequency domain are set to 6 RE; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, the same antenna two adjacent reference signals on frequency domain are set to 6 RE.
In step S402, send the position for time domain and be provided with in such a way:
(26) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, one of can be in the following manner be provided with:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(28) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
In step S404, the logic index is mapped to the operation of antenna port one of can be in the following manner realizes:
(1) logic index 0,1,2,3 is mapped to antenna port a, a+1, b, b+1 respectively; Logic index 4,5,6,7 is mapped to antenna port a+2, a+3, b+2, b+3 respectively, wherein, the value of a can for 0,6,7,8, among the 9} one, the value of b can for 4,5,6,7,8,9,10,11,12, among the 13} one.
(2) logic index 0,1,2,3 is mapped to antenna port a, a+1, a+2, a+3 respectively; Logic index 4,5,6,7 is mapped to antenna port b, b+1, b+2, b+3 respectively, wherein, the value of a can for 0,6,7,8, among the 9} one, the value of b can for 4,5,6,7,8,9,10,11,12, among the 13} one.
Through this embodiment; The sending method of reference signal when 8 antennas are provided; Employing sends the position through the frequency domain that the antenna reference signal is set and time domain is sent the position; And the logic index is mapped to the method for antenna port, under the prerequisite that guarantees with the identical expense of 4 antennas, can support the channel estimating of 8 antenna systems.
Below in conjunction with instance implementation procedure of the present invention is described in detail.In the accompanying drawing of following examples, X direction is time domain (t), and y direction is frequency domain (f), and a sub-frame comprises even number time slot and odd number time slot, and each lattice is represented a resource element (RE), that is, and and R
0The shared RE of reference signal of expression antenna port 0, R
1The shared RE of reference signal of expression antenna port 1, R
2The shared RE of reference signal of expression antenna port 2, R
3The shared RE of reference signal of expression antenna port 3, R
4The shared RE of reference signal of expression antenna port 4, R
5The shared RE of reference signal of expression antenna port 5, R
6The shared RE of reference signal of expression antenna port 6, R
7The shared RE of reference signal of expression antenna port 7, R
8The shared RE of reference signal of expression antenna port 8, R
9The shared RE of reference signal of expression antenna port 9, R
10The shared RE of reference signal of expression antenna port 10, R
11The shared RE of reference signal of expression antenna port 11, R
12The shared RE of reference signal of expression antenna port 12, R
13The shared RE of reference signal of expression antenna port 13.
Embodiment one
Fig. 5 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention one, and is as shown in Figure 5, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal as shown in Figure 5, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment two
Fig. 6 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention two, and is as shown in Figure 6, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal as shown in Figure 6, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment three
Fig. 7 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention three, and is as shown in Figure 7, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal as shown in Figure 7, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment four
Fig. 8 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention four, and is as shown in Figure 8, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal as shown in Figure 8, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment five
Fig. 9 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention five, and is as shown in Figure 9, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal as shown in Figure 9, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment six
Figure 10 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention six, and is shown in figure 10, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 10, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment seven
Figure 11 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention seven, and is shown in figure 11, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 11, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment eight
Figure 12 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention eight, and is shown in figure 12, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 12, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 5,6,7,8,9,10,11,12, among the 13} one.
Embodiment nine
Figure 13 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention nine, and is shown in figure 13, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 13, in addition, the value of a can also for 0,7,8, among the 9} one, the value of b can also for 4,5,6,7,8,9,11,12, among the 13} one.
Embodiment ten
Figure 14 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention ten, and is shown in figure 14, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 14, in addition, the value of a can also for 0,7,8, among the 9} one, the value of b can also for 4,5,6,7,8,9,11,12, among the 13} one.
Figure 15 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 11, and is shown in figure 15, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 15, in addition, the value of a can also for 0,7,8, among the 9} one, the value of b can also for 4,5,6,7,8,9,11,12, among the 13} one.
Embodiment 12
Figure 16 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 12, and is shown in figure 16, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 16, in addition, the value of a can also for 0,7,8, among the 9} one, the value of b can also for 4,5,6,7,8,9,11,12, among the 13} one.
Embodiment 13
Figure 17 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 13, and is shown in figure 17, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 17, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 4,5,7,8,9,10,11,12, among the 13} one.
Embodiment 14
Figure 18 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 14, and is shown in figure 18, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 18, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 4,5,7,8,9,10,11,12, among the 13} one.
Embodiment 15
Figure 19 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 15, and is shown in figure 19, under the condition of common CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=6, and the odd number time slot comprises OFDM symbol 1=0 to 1=6, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 19, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 4,5,7,8,9,10,11,12, among the 13} one.
Figure 20 is the sketch map according to the sending method of the downlink reference signal of the embodiment of the invention 16, and is shown in figure 20, under the condition of expansion CP; Sub-district ID is 0; The even number time slot comprises OFDM symbol 1=0 to 1=5, and the odd number time slot comprises OFDM symbol 1=0 to 1=5, and this method may further comprise the steps:
Wherein, sending the position for frequency domain is provided with in such a way:
(1) the logic index is that the reference signal of 0 antenna is the 0th RE at the initial position of frequency domain;
(2) on same OFDM symbol, the reference signal of same antenna is spaced apart 12 RE, and the reference signal of adjacent two antennas is spaced apart 3 RE;
(3) sending on two adjacent OFDM symbols of reference signal that the logic index is 0,1,2,3 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set; Sending on two adjacent OFDM symbols of reference signal that the logic index is 4,5,6,7 antenna, two adjacent on the frequency domain of same antenna reference signals, 6 RE at interval are set.
Wherein, sending the position for time domain is provided with in such a way:
(1) be that the reference signal of 0,1,2,3 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 0,1,2,3 antenna is arranged on the 1st the OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot with the logic index;
(2) be that the reference signal of 4,5,6,7 antenna is arranged on the same OFDM symbol with the logic index; And, be that the reference signal of 4,5,6,7 antenna is arranged on the 2nd the OFDM symbol of each time slot with the logic index.
Through above implementation step, form the transmission position of antenna reference signal shown in figure 20, in addition, the value of a can also for 6,7,8, among the 9} one, the value of b can also for 4,5,7,8,9,10,11,12, among the 13} one.
Device embodiment
According to embodiments of the invention, a kind of dispensing device of downlink reference signal is provided, this method is based on 8 antenna radiation patterns, and 8 antennas are represented with logic index 0-7 respectively.Figure 21 is the flow chart according to the sending method of the downlink reference signal of the embodiment of the invention; Shown in figure 21; This device comprises: frequency domain is provided with module 212, time domain is provided with module 214, mapping block 216, sending module 218, is described in detail in the face of above structure down.
Frequency domain is provided with module 212, and the frequency domain that is used to be provided with the reference signal of antenna sends the position; Wherein, sending the position for frequency domain is provided with in such a way: confirm the initial position of the reference signal of every antenna at frequency domain according to cell ID; On same OFDM symbol, the reference signal of the same antenna is set to 12 RE, the reference signal of adjacent two antennas is set to 3 RE; On two adjacent OFDM symbols of the reference signal of sending identical antenna; The same antenna two adjacent reference signals on frequency domain are set to 6 RE; Wherein, Reference signal is spaced apart n and is meant between the shared resource element of two reference signals that n-1 resource element arranged, and the value of n is one of following: 3,6,12;
Time domain is provided with module 214, and the time domain that is used to be provided with the reference signal of antenna is sent the position; Wherein, sending the position for time domain is provided with in such a way: the reference signal that with the logic index is 0,1,2,3 antenna is arranged on the same OFDM symbol; The reference signal that with the logic index is 4,5,6,7 antenna is arranged on the same OFDM symbol;
Sending module 218 is connected to mapping block 216, is used for sending the corresponding antenna reference signal at antenna port.
Through this embodiment; The dispensing device of reference signal when 8 antennas are provided; Employing sends the position through the frequency domain that the antenna reference signal is set and time domain is sent the position; And the logic index is mapped to the method for antenna port, under the prerequisite that guarantees with the identical expense of 4 antennas, can support the channel estimating of 8 antenna systems.
The preferred structure of facing the dispensing device of downlink reference signal down is described in detail.
Embodiment one
Figure 22 is the preferred structure block diagram according to the dispensing device of the downlink reference signal of the embodiment of the invention one, and is shown in figure 22, and the preferred structure of this device is following:
Frequency domain is provided with module 212 and also comprises: first frequency domain is provided with submodule 2202; Be used for the same antenna two adjacent reference signals on frequency domain being set to 6 RE sending two adjacent OFDM symbols that the logic index is the reference signal of 0,1,2,3 antenna; Second frequency domain is provided with submodule 2204, is used for sending two adjacent OFDM symbols that the logic index is the reference signal of 4,5,6,7 antenna the same antenna two adjacent reference signals on frequency domain being set to 6 RE.
Time domain is provided with module 214 and also comprises: first time domain is provided with submodule 2206, and to be used for the logic index be that the reference signal of 0,1,2,3 antenna is arranged on the 1st OFDM symbol and the 3rd the OFDM symbol reciprocal of each time slot or with the logic index is the 1st OFDM symbol that the reference signal of 0,1,2,3 antenna is arranged on each time slot; Second time domain is provided with submodule 2208, and being used for the logic index is the 2nd the OFDM symbol that the reference signal of 4,5,6,7 antenna is arranged on each time slot.
Embodiment two
Figure 23 is the preferred structure block diagram according to the dispensing device of the downlink reference signal of the embodiment of the invention two, and is shown in figure 23, and the preferred structure of this device is following:
Frequency domain is provided with module 212 and also comprises: first frequency domain is provided with submodule 2302; Be used for the same antenna two adjacent reference signals on frequency domain being set to 6 RE sending two adjacent OFDM symbols that the logic index is the reference signal of 0,1,2,3 antenna; Second frequency domain is provided with submodule 2304, is used for sending two adjacent OFDM symbols that the logic index is the reference signal of 4,5,6,7 antenna the same antenna two adjacent reference signals on frequency domain being set to 6 RE.
Time domain is provided with module 214 and also comprises: first time domain is provided with submodule 2306, and to be used for the logic index be that the reference signal of 0,1,2,3 antenna is arranged on the 1st OFDM symbol and the 3rd the OFDM symbol reciprocal of each time slot or with the logic index is the 1st OFDM symbol that the reference signal of 0,1,2,3 antenna is arranged on each time slot; Second time domain is provided with submodule 2308, and being used for the logic index is the 2nd the OFDM symbol that the reference signal of 4,5,6,7 antenna is arranged on each time slot.
Pass through embodiments of the invention; Employing sends the position through the frequency domain that the antenna reference signal is set and time domain is sent the position; And the logic index is mapped to the method for antenna port; Having solved in the correlation technique needs a kind of problem that can support the pilot design scheme of 8 antenna scenes, and then under the prerequisite that guarantees with the identical expense of 4 antennas, can support the channel estimating of 8 antenna systems.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the sending method of a downlink reference signal, based on 8 antenna radiation patterns, said 8 antennas represent that with logic index 0-7 it is characterized in that, said method comprises respectively: the frequency domain that the reference signal of antenna is set sends position and time domain transmission position;
Wherein, sending the position for said frequency domain is provided with in such a way: confirm the initial position of the reference signal of every antenna at frequency domain according to cell ID; On same OFDM symbol, the reference signal of the same antenna is set to 12 resource elements, the reference signal of adjacent two antennas is set to 3 resource elements; On two adjacent OFDM symbols of the reference signal of sending identical antenna; The same antenna two adjacent reference signals on frequency domain are set to 6 resource elements; Wherein, Reference signal is spaced apart n and is meant between the shared resource element of two reference signals that n-1 resource element arranged, and the value of n is one of following: 3,6,12;
Sending the position for said time domain is provided with in such a way: the reference signal that with the logic index is 0,1,2,3 antenna is arranged on the same OFDM symbol; The reference signal that with the logic index is 4,5,6,7 antenna is arranged on the same OFDM symbol;
Said logic index is mapped to antenna port, and sends the corresponding antenna reference signal at antenna port.
2. method according to claim 1; It is characterized in that; Said on two adjacent OFDM symbols of the reference signal of sending identical antenna, the same antenna two adjacent reference signals on frequency domain are set to 6 resource elements specifically comprise:
Sending on two adjacent OFDM symbols of reference signal that said logic index is 0,1,2,3 antenna, the same antenna two adjacent reference signals on said frequency domain are set to 6 resource elements;
Sending on two adjacent OFDM symbols of reference signal that said logic index is 4,5,6,7 antenna, the same antenna two adjacent reference signals on said frequency domain are set to 6 resource elements.
3. method according to claim 1 is characterized in that, sends the position for said time domain and further is provided with in such a way:
The reference signal that with said logic index is 0,1,2,3 antenna is arranged on the 1st OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot;
The reference signal that with said logic index is 4,5,6,7 antenna is arranged on the 2nd OFDM symbol of each time slot.
4. method according to claim 1 is characterized in that, sends the position for said time domain and further is provided with in such a way:
The reference signal that with said logic index is 0,1,2,3 antenna is arranged on the 1st OFDM symbol of each time slot;
The reference signal that with said logic index is 4,5,6,7 antenna is arranged on the 2nd OFDM symbol of each time slot.
5. method according to claim 1 is characterized in that, the said operation that said logic index is mapped to antenna port specifically comprises:
Logic index 0,1,2,3 is mapped to antenna port a, a+1, a+2, a+3 respectively;
Logic index 4,5,6,7 is mapped to antenna port b, b+1, b+2, b+3 respectively;
Wherein, the value of a be 0,6,7,8, among the 9} one, the value of b be 4,5,6,7,8,9,10,11,12, among the 13} one.
6. method according to claim 1 is characterized in that, the said operation that said logic index is mapped to antenna port specifically comprises:
Logic index 0,1,2,3 is mapped to antenna port a, a+1, b, b+1 respectively;
Logic index 4,5,6,7 is mapped to antenna port a+2, a+3, b+2, b+3 respectively;
Wherein, the value of a be 0,6,7,8, among the 9} one, the value of b be 4,5,6,7,8,9,10,11,12, among the 13} one.
7. the dispensing device of a downlink reference signal, based on 8 antenna radiation patterns, said 8 antennas represent that with logic index 0-7 it is characterized in that, said device comprises respectively:
Frequency domain is provided with module, and the frequency domain that is used to be provided with the reference signal of antenna sends the position; Wherein, sending the position for said frequency domain is provided with in such a way: confirm the initial position of the reference signal of every antenna at frequency domain according to cell ID; On same OFDM symbol, the reference signal of the same antenna is set to 12 resource elements, the reference signal of adjacent two antennas is set to 3 resource elements; On two adjacent OFDM symbols of the reference signal of sending identical antenna; The same antenna two adjacent reference signals on frequency domain are set to 6 resource elements; Wherein, Reference signal is spaced apart n and is meant between the shared resource element of two reference signals that n-1 resource element arranged, and the value of n is one of following: 3,6,12;
Time domain is provided with module, and the time domain that is used to be provided with the reference signal of antenna is sent the position; Wherein, sending the position for said time domain is provided with in such a way: the reference signal that with the logic index is 0,1,2,3 antenna is arranged on the same OFDM symbol; The reference signal that with the logic index is 4,5,6,7 antenna is arranged on the same OFDM symbol;
Mapping block is used for said logic index is mapped to antenna port;
Sending module is used for sending the corresponding antenna reference signal at antenna port.
8. device according to claim 7 is characterized in that, said frequency domain is provided with module and comprises:
First frequency domain is provided with submodule; Be used for the same antenna two adjacent reference signals on said frequency domain being set to 6 resource elements sending two adjacent OFDM symbols that said logic index is the reference signal of 0,1,2,3 antenna;
Second frequency domain is provided with submodule; Be used for the same antenna two adjacent reference signals on said frequency domain being set to 6 resource elements sending two adjacent OFDM symbols that said logic index is the reference signal of 4,5,6,7 antenna.
9. device according to claim 7 is characterized in that, said time domain is provided with module and comprises:
First time domain is provided with submodule, and to be used for said logic index be that the reference signal of 0,1,2,3 antenna is arranged on the 1st OFDM symbol and the 3rd OFDM symbol reciprocal of each time slot or with said logic index is the 1st OFDM symbol that the reference signal of 0,1,2,3 antenna is arranged on each time slot;
Second time domain is provided with submodule, and being used for said logic index is the 2nd OFDM symbol that the reference signal of 4,5,6,7 antenna is arranged on each time slot.
10. device according to claim 7 is characterized in that, said mapping block specifically comprises:
First mapping submodule is used for logic index 0,1,2,3 is mapped to antenna port a, a+1, b, b+1 respectively;
Second mapping submodule is used for logic index 4,5,6,7 is mapped to antenna port a+2, a+3, b+2, b+3 respectively;
Wherein, the value of a be 0,6,7,8, among the 9} one, the value of b be 4,5,6,7,8,9,10,11,12, among the 13} one.
11. device according to claim 7 is characterized in that, said mapping block specifically comprises:
The 3rd mapping submodule is used for logic index 0,1,2,3 is mapped to antenna port a, a+1, a+2, a+3 respectively;
The 4th mapping submodule is used for logic index 4,5,6,7 is mapped to antenna port b, b+1, b+2, b+3 respectively;
Wherein, the value of a be 0,6,7,8, among the 9} one, the value of b be 4,5,6,7,8,9,10,11,12, among the 13} one.
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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 |
| CN101729091B (en) * | 2008-10-27 | 2013-06-05 | 华为技术有限公司 | Configuration, notification and channel estimation methods of pilot frequency signals and devices thereof |
| CN101777945B (en) * | 2009-01-12 | 2013-05-08 | 电信科学技术研究院 | Method for sending reference signal in multi-antenna communication system and base station |
| CN101778065B (en) * | 2009-01-12 | 2013-08-07 | 中兴通讯股份有限公司 | Method and system for mapping downlink data carriers |
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