CN101388716B - Wireless sub-frame transmission method and system - Google Patents
Wireless sub-frame transmission method and system Download PDFInfo
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Abstract
The implement of the invention discloses a method for transmitting wireless sub frames, which at least comprises: setting an original time slot which comprises a middle code, a data symbol and a guard interval to be a downlink service time slot which only comprises the data symbol and the guard interval, setting a channel estimating time slot which is used in the wireless sub frames, wherein the channel estimating time slot comprises a GP and at least one channel estimating sequence which is used to estimate channels, forming the wireless sub frames which need transmitting according to the downlink service time slot and/or the channel estimating time slot, and utilizing the formed wireless sub frames which need transmitting to transmit all downlink services. The invention also provides a system for transmitting the wireless sub frames, which comprises a base station and a user device. Two time slot structures which are proposed in the implement of the invention can eliminate Midamble codes in the time slots and can use time and code channel resources in data transmission to the maximum, thereby effectively improving the data transmission efficiency.
Description
Technical field
The present invention relates to moving communicating field, refer in particular to a kind of transmission method and system of wireless sub-frame.
Background technology
In order to make the 3G communication system can better satisfy the various demand of user, increasing business is introduced into wherein, for example multimedia broadcast multicast services (MBMS, Multimedia Broadcasting Multicast Service) etc.MBMS can provide a data source in the mobile network, thereby sends data to a plurality of users, realizes point-to-multipoint service, carries out Internet resources and shares, and has improved utilization rate of network resource, especially air interface resource.MBMS can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize multicast and broadcasting that high-speed multimedia is professional, has complied with following mobile data Development Trend.It is said that but the defeated speed of this type of professional general logarithm all has higher requirements, and therefore, in order to obtain faster data transmission speed, needs to consider how to improve the problem of spectrum efficiency.
Fig. 1 is the sketch map of wireless sub-frame structure of the prior art.As shown in Figure 1, in TD SDMA (TD-SCDMA) system, (TS0～TS6) constitute with three special time slots, each time slot can be divided into several code channels again to each wireless sub-frame by seven conventional time slots.Wherein, three special time slots are respectively downlink synchronization slot (DwPTS), protection (GP) and uplink synchronous time slot (UpPTS) at interval.Wherein, DwPTS is a downlink pilot frequency channel, is used for the transmission of the down-going synchronous information of system, and UpPTS is an ascending pilot channel, is used for the uplink synchronous information transmission that the user inserts, and GP is used to provide the time interval of descending sending time slots to up sending time slots conversion.Each subframe all is to begin from time slot TS0.As the time slot of up link with as separating by a time slot switching point between the time slot of down link.Each subframe has 2 time slot switching points, and first time slot switching point is fixed on time slot TS0 end, and second time slot switching point then depends in this subframe possibly be arranged in the end of certain time slot of time slot TS1～TS6 to the configuration of uplink and downlink time slot.
Seven conventional time slot TS0～TS6 for TD-SCDMA system wireless subframe; The structure of each time slot is as shown in Figure 1; Comprise respectively: be positioned at middle intermediate code (the Midamble sign indicating number of structure of time slot; Be labeled as " M " among the figure), be positioned at the data symbol (Data is labeled as " D " among the figure) of intermediate code both sides and be positioned at the terminal protection of time slot (GP) at interval.Wherein, intermediate code is the training sequence that receiving terminal is used to carry out channel estimating, so that the data symbol of the corresponding time slot that demodulation is received according to channel estimation value; The interference of time slot before and after GP is used to avoid.The total length of each conventional time slot is 864 chips (chip), and wherein, data symbol is distributed in the two ends of Midamble sign indicating number symmetrically, and the length of each data symbol is 352chip, and the length of Midamble sign indicating number is 144chip, and the length of GP is 16chip.Because in above-mentioned structure of time slot, the Midamble sign indicating number fixedly occupies 144chip in time slot, so data transmission efficiency is not high.
Based on the professional special carrier scheme of above-mentioned MBMS, also have a kind of complete descending frame structure that can improve spectrum efficiency in the prior art, in this frame structure, the length of Midamble sign indicating number is adjusted to 96chip in each time slot, and has cancelled GP.But owing to still kept the Midamble sign indicating number in this scheme, so data transmission efficiency neither be very high.
Summary of the invention
In view of this, the main purpose of the embodiment of the invention is to provide a kind of transmission method and system of wireless sub-frame, thereby improves data transmission efficiency.
For achieving the above object, the technical scheme in the embodiment of the invention is achieved in that
A kind of transmission method of wireless sub-frame, this method comprises:
Include intermediate code, data symbol and protection former time slot at interval and be set to only comprise data symbol and protection downlink business time slot at interval;
Be provided for the channel estimating time slot of wireless sub-frame, in said channel estimating time slot, comprise that protection is used for the channel estimation sequence of channel estimating with at least one at interval;
According to above-mentioned downlink business time slot and/or channel estimating time slot, form wireless sub-frame waiting for transmission, utilize the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission.
Embodiments of the invention also provide a kind of base station, and this base station comprises: wireless sub-frame is provided with module and professional transport module;
Said wireless sub-frame is provided with module; Be used for being provided with the time slot of wireless sub-frame; Wherein, Include intermediate code, data symbol and protection former time slot at interval and be set to only comprise data symbol and protection downlink business time slot at interval, be provided for the channel estimating time slot of wireless sub-frame, comprise in the said channel estimating time slot that protection is used for the channel estimation sequence of channel estimating with at least one at interval;
Said professional transport module is used for forming wireless sub-frame waiting for transmission according to above-mentioned downlink business time slot and/or channel estimating time slot, utilizes the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission.
Embodiments of the invention also provide a kind of subscriber equipment, and this subscriber equipment comprises: receiver module and detection module;
Said receiver module is used to receive the wireless sub-frame that carries out professional transmission, and the wireless sub-frame that is received is offered detection module; Wherein, only comprise data symbol and protection interval in the downlink business time slot of said wireless sub-frame, and be provided with the channel estimating time slot in the said wireless sub-frame; In said channel estimating time slot, comprise that protection is used for the channel estimation sequence of channel estimating with at least one at interval;
Said detection module is used for the wireless sub-frame that receives is carried out joint-detection;
Said detection module comprises: channel estimating submodule and joint-detection submodule;
Said channel estimating submodule is used for carrying out channel estimating according to the channel estimation sequence in the wireless sub-frame channel estimating time slot, obtains the channel estimation value of corresponding time slot; Obtain the channel estimation value of downlink business time slot according to the channel estimation value of channel estimating time slot; The channel estimation value of resulting each time slot is offered the joint-detection submodule;
Said joint-detection submodule is used to utilize the channel estimation value of each time slot that the channel estimating submodule provides, to the respective channel estimated value the data symbol of corresponding time slot carry out joint-detection.
Embodiments of the invention also provide a kind of radio frame transmission system, and this system comprises: base station and subscriber equipment;
Said base station; Be used for being provided with the time slot of wireless sub-frame; Wherein, Include intermediate code, data symbol and protection former time slot at interval and be set to only comprise data symbol and protection downlink business time slot at interval, be provided for the channel estimating time slot of wireless sub-frame, comprise in the said channel estimating time slot that protection is used for the channel estimation sequence of channel estimating with at least one at interval; According to above-mentioned downlink business time slot and/or channel estimating time slot, form wireless sub-frame waiting for transmission, utilize the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission;
Said subscriber equipment is used to receive the above-mentioned wireless sub-frame that carries out full downlink traffic transmission, and wireless sub-frame is resolved.
To sum up can know; A kind of transmission method and system of wireless sub-frame are provided in the embodiments of the invention; Through the transmission method of the wireless sub-frame that proposes in the embodiment of the invention, two kinds of structure of time slot that propose capable of using, the occupied 144chip of cancellation Midamble sign indicating number in time slot; With time and the code channel resource transfer of data that is used for as much as possible, thereby effectively improved data transmission efficiency; In addition, owing to can be provided with flexibly the channel estimation sequence that is used for channel estimating, therefore can improve flexibility and accuracy to channel estimating according to actual conditions.
Description of drawings
Fig. 1 is the sketch map of wireless sub-frame structure of the prior art.
Fig. 2 is the flow chart of the method for radio frame transmission in the embodiment of the invention.
Fig. 3 is the sketch map of structure of time slot in the embodiment of the invention.
Fig. 4 is the sketch map of frame structure new in the embodiment of the invention.
Fig. 5 is the sketch map that forms wireless sub-frame in the embodiment of the invention.
Fig. 6 is the sketch map of the frame structure of wireless sub-frame in the present invention's first preferred embodiment.
Fig. 7 is the sketch map of structure of time slot in the present invention's first preferred embodiment.
Fig. 8 is the sketch map of structure of time slot 2 continuous send modes in the present invention's first preferred embodiment.
Fig. 9 is the sketch map of the frame structure of wireless sub-frame in the present invention's second preferred embodiment.
Figure 10 is the sketch map of structure of time slot in the present invention's second preferred embodiment.
Figure 11 is the sketch map of the 2 interval send modes of structure of time slot in the present invention's second preferred embodiment.
Figure 12 is the sketch map of the frame structure of another kind of wireless sub-frame in the embodiment of the invention.
Figure 13 is the application sketch map of structure of time slot 2 in the embodiment of the invention.
Figure 14 is the structure chart of radio frame transmission system in the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage express clearlyer, the present invention is remake further detailed explanation below in conjunction with accompanying drawing and specific embodiment.
Fig. 2 is the flow chart of the method for wireless sub-frame transmission in the embodiment of the invention.As shown in Figure 2, this flow process comprises the steps:
In this step, can the structure of time slot of the time slot in the wireless sub-frame be provided with in advance, described setting comprises: the structure of time slot to the downlink business time slot in the wireless sub-frame is provided with, and makes through not comprising intermediate code in the downlink business time slot after being provided with; In addition; Also can be wireless sub-frame a kind of structure of time slot that is used for channel estimating is set; At the described structure of time slot that is used for channel estimating; Comprise that at least one is used for the channel estimation sequence of channel estimating, use the time slot of this structure of time slot can be referred to as the channel estimating time slot, this time slot can be used for channel is estimated.Two kinds of above-mentioned structure of time slot are as shown in Figure 3.
Fig. 3 is the sketch map of structure of time slot in the embodiment of the invention.As shown in Figure 3, two kinds of new structure of time slot have been proposed: structure of time slot 1 and structure of time slot 2 in the embodiments of the invention.Wherein, cancelled the Midamble sign indicating number in the structure of time slot 1, and only comprised GP and data symbol, therefore, in structure of time slot 1, except transmitting necessary GP, a data symbol, and no longer need transmit the Midamble sign indicating number.And, a new structure of time slot 2 is provided also in the embodiments of the invention in order to carry out channel estimating.In the structure of time slot that increases newly 2, except GP, can also transmit one or more channel estimation sequence (Channel estimation sequence) that are used to carry out channel estimating.Wherein, it can be identical channel estimation sequence with channel estimation sequence 302 that structure of time slot 2 is attend institute's channel transmitted estimated sequence 301, also can be different channel estimation sequence; Described channel estimation sequence can take the whole time slot except GP; Also can only take the part of a time slot; When channel estimation sequence only took a time slot a part of, the remainder of this time slot can be used to data symbol, also can not be used for data symbol; Channel estimation sequence in the described time slot can be sent through same code channel, also can send through a plurality of code channels.In addition, the above-mentioned time slot with structure of time slot 1 or structure of time slot 2 all need carry out the processing of spread spectrum and scrambling before forming wireless sub-frame.
Because the wireless sub-frame described in the embodiment of the invention is to be used for full downlink traffic transmission, and need not to carry out up transfer of data, therefore in the frame structure of said wireless sub-frame, cancelled the time slot switching point, only keep the downlink business time slot.
Fig. 4 is the sketch map of the frame structure of wireless sub-frame in the embodiment of the invention.As shown in Figure 4, in an embodiment of the present invention, can be that the wireless sub-frame of 5 milliseconds (ms) is divided into N the time slot that length is identical with length, wherein, described N is a nonnegative integer, can be provided with according to actual conditions.A described N time slot can be the downlink business time slot that adopts structure of time slot 1 as shown in Figure 3, also can be the channel estimating time slot that adopts the structure of time slot 2 shown in Fig. 3.Therefore; In the frame structure of wireless sub-frame shown in Figure 4; Both comprised the downlink business time slot that adopts structure of time slot 1 as shown in Figure 3 in the wireless sub-frame; Comprise the channel estimating time slot that adopts structure of time slot 2 as shown in Figure 3 again, described channel estimating time slot does not need by continuous transmission, and can be at a sub-intra frame interval M (M＜N) individual time slot transmission.
The above is the frame structure of wireless sub-frame described in the embodiment of the invention, and process such as Fig. 5 of specifically forming said wireless sub-frame are said.
Fig. 5 is the sketch map that forms wireless sub-frame in the embodiment of the invention.In the TD-SCDMA system, a wireless sub-frame can comprise a plurality of time slots, and each time slot can be divided into several code channels, and the data of same time slot can be handled through a plurality of code channels concurrently.In an embodiment of the present invention, will have 16 code channels with a time slot is that example is introduced technical scheme of the present invention.As shown in Figure 5; In an embodiment of the present invention; The process that forms wireless sub-frame comprises: in same code channel, (for example, in the 1st code channel, use spreading code 1 according to the pairing spreading code of this code channel; In the 16th code channel, use spreading code 16 etc.) with scrambler to this code channel in the data or the channel estimation sequence of required processing carry out spread spectrum and scrambling process, then data after spread spectrum and the scrambling process or channel estimation sequence are carried out the framing processing in subframe formation module.
In the prior art, generally need, framing add intermediate code in handling for each time slot in the wireless sub-frame.And in an embodiment of the present invention; Because forming the structure of time slot of each time slot of wireless sub-frame is structure of time slot 1 or structure of time slot 2 shown in Figure 3; And do not comprise intermediate code in structure of time slot 1 or the structure of time slot 2; So above-mentioned framing in embodiments of the present invention need not add intermediate code for each time slot in the wireless sub-frame in handling.In addition, in the prior art, be when framing is handled, just to add intermediate code, so intermediate code need not carry out spread spectrum and scrambling process, and in an embodiment of the present invention, need carry out spread spectrum and scrambling process channel estimation sequence.
After each code channel is all accomplished corresponding framing processing; Data after the process framing processing of each code channel are superposeed; Form wireless sub-frame waiting for transmission in this code channel, send then, thereby utilize formed wireless sub-frame to carry out full downlink traffic transmission.Utilize formed wireless sub-frame to carry out the method for full downlink traffic transmission, identical with transmission method of the prior art, therefore repeat no more.
Further, subscriber equipment (UE) is resolved the received above-mentioned wireless sub-frame that carries out downlink traffic transmission.
Concrete resolving can be: utilize the channel estimation sequence in each channel estimating time slot of said wireless sub-frame to carry out channel estimating, according to resulting channel estimation value (being channel impulse response) data symbol in the pairing time slot of this channel estimation value is carried out joint-detection; The time slot that is not provided with channel estimation sequence according to the channel estimation value in the channel estimating time slot in the said wireless sub-frame (is the downlink business time slot after above-mentioned process is provided with; Down with) channel estimation value, and this data symbol that is not provided with in the time slot of channel estimation sequence carried out joint-detection.
Wherein,, then also need carry out integrated treatment, to improve the Channel Processing precision to resulting a plurality of channel estimation values (being channel impulse response) if in a time slot, a plurality of channel estimation sequence are arranged.In order to improve performance; For some time slots; Can also the data symbol to this time slot be carried out after the joint-detection resulting data and this time slot is carried out the resultant channel estimation value of channel estimating (being channel impulse response) carry out convolution operation; Thereby the data that reduction is received are removed the interference of data to channel estimation sequence; And then the channel estimation sequence after the place to go disturbed is carried out channel estimating once more; After obtaining more accurately channel estimation value (being channel impulse response); According to said channel estimation value more accurately the data symbol of this time slot is carried out joint-detection again, thereby improve the precision of joint-detection.
In addition; Utilize the channel estimation value of channel estimating time slot be not provided with channel estimation sequence time slot channel estimation value can for: the channel estimation value according at least two adjacent channel estimating time slots carries out interpolative operation, obtains the channel estimation value that these two adjacent channels estimate not to be provided with between time slots the time slot of channel estimation sequence; Perhaps be: the channel estimation value of time slot that will be provided with channel estimation sequence is directly as the channel estimation value of the adjacent time slot that is not provided with channel estimation sequence.Concrete interpolative operation can be any interpolative operation in the prior art, like linear interpolation etc.
Below will combine specific embodiment that the method for above-mentioned wireless sub-frame transmission is carried out introduction further.
First preferred embodiment: when N=8.
Frame structure sketch map for wireless sub-frame in the present invention's first preferred embodiment shown in Figure 6.As shown in Figure 6, when N=8, can the wireless sub-frame of 5ms be divided into 8 downlink business time slots that length is identical, the total length of each business time-slot is 800chip.At this moment, the time slot in this wireless sub-frame can adopt structure of time slot as shown in Figure 71 or structure of time slot 2.In structure of time slot shown in Figure 71, data symbol occupies 768chip, and GP occupies 32chip, and the total length of whole time slot is 800chip, and therefore, the efficiency of transmission of structure of time slot 1 shown in Figure 7 is: 768/800=96%.And in the structure of time slot in the prior art; The total length of time slot is 864chip; And data symbol only occupies 704chip, and therefore the efficiency of transmission of structure of time slot of the prior art is: 704/864=81.5%, and than the efficiency of transmission ratio low 14.5% of structure of time slot in the present embodiment 1.
In the present embodiment, structure of time slot 2 can include only channel estimation sequence, can both comprise also that channel estimation sequence also comprised data symbol.For example, as shown in Figure 7, in structure of time slot 2, channel estimation sequence takies 64chip, and data symbol occupies 704chip, and GP occupies 32chip.Therefore, even in structure of time slot 2, efficiency of transmission also is: 704/800=88%, and apparently higher than the efficiency of transmission of structure of time slot of the prior art.
In the present embodiment, the mode that can be employed in same code channel interval transmission is sent the time slot that adopts structure of time slot 2, also can adopt the mode of in same code channel, sending continuously as shown in Figure 8 to send the time slot that adopts structure of time slot 2.As shown in Figure 8, SF is the abbreviation of structure of time slot (Slot Format), and SF1 representes to adopt the time slot of structure of time slot 1, and SF2 representes to adopt the time slot of structure of time slot 2, code 1 expression the 1st code channel, and code 2 expressions the 2nd code channel ..., code 16 expressions the 16th code channel.At this moment, the time slot in the wireless sub-frame in the 1st code channel all adopts structure of time slot 2, and the time slot in the wireless sub-frame in other code channels all adopts structure of time slot 1.After the wireless sub-frame in above-mentioned 16 code channels forms, send after these subframes are superposeed, thereby carry out full downlink traffic transmission.
Second preferred embodiment: when N=10.
Frame structure sketch map for wireless sub-frame in the present invention's second preferred embodiment shown in Figure 9.As shown in Figure 9, when N=10, can the wireless sub-frame of 5ms be divided into 10 downlink business time slots that length is identical, the total length of each business time-slot is 640chip.At this moment, the time slot in this wireless sub-frame can adopt structure of time slot shown in figure 10 1 or structure of time slot 2.In structure of time slot shown in Figure 10 1, data symbol occupies 608chip, and GP occupies 32chip; The total length of whole time slot is 640chip; Therefore, the efficiency of transmission of structure of time slot 1 shown in Figure 10 is: 608/640=95% is higher than the efficiency of transmission of structure of time slot of the prior art.
In the present embodiment, structure of time slot 2 can both comprise that channel estimation sequence also comprised data symbol, for example, and structure of time slot 2 shown in Figure 7; Also can include only channel estimation sequence, for example, structure of time slot 2 shown in Figure 10.Sketch map for structure of time slot 2 in the present invention's second preferred embodiment shown in Figure 10.Shown in figure 10, in structure of time slot 2, channel estimation sequence takies 608chip, and GP occupies 32chip.Therefore, data symbol not in this structure of time slot 2.
In the present embodiment, can be employed in the mode of sending continuously in the same code channel and send the time slot that adopts structure of time slot 2, also can adopt the mode in same code channel interval transmission shown in figure 11 to send the time slot that adopts structure of time slot 2.Shown in figure 11, SF is the abbreviation of structure of time slot (Slot Format), and the time slot of structure of time slot 1 is adopted in SF 1 expression, and SF2 representes to adopt the time slot of structure of time slot 2, code 1 expression the 1st code channel, and code 2 expressions the 2nd code channel ..., code 16 expressions the 16th code channel.At this moment, the employing structure of time slot 2 that the time slot in the wireless sub-frame in the 1st code channel has, the employing structure of time slot 1 that has; And the time slot in the wireless sub-frame in other code channels all adopts structure of time slot 1.After the wireless sub-frame in above-mentioned 16 code channels forms, send after these subframes are superposeed, thereby carry out full downlink traffic transmission.
In addition, shown in Figure 12 is the frame structure sketch map of another kind of wireless sub-frame in the embodiment of the invention.Shown in figure 12, if be applied in the scene that need carry out down-going synchronous, then need in the frame structure of wireless sub-frame, add downlink synchronization slot (DwPTS), thereby carry out down-going synchronous through DwPTS.
Shown in Figure 13 is the application sketch map of structure of time slot 2 in the embodiment of the invention.Shown in figure 13; The structure of time slot 2 that proposes in the embodiment of the invention also can be applied in the existing TD-SCDMA frame structure separately; Be used for channel estimating with the Midamble sign indicating number; Promptly in same wireless sub-frame, use Midamble sign indicating number and the channel estimation sequence in the structure of time slot 2 in the existing TD-SCDMA frame structure simultaneously, channel is estimated, obtain channel estimation value separately respectively through described Midamble sign indicating number and channel estimation sequence; And above-mentioned resulting channel estimation value carried out integrated treatment, thereby improve channel estimated accuracy.
In addition, the time slot structure that is proposed in the embodiment of the invention is suitable for the MBMS business, uses with MBMS professionally but be not limited in, and in other has the applied environment of similar characteristic, also can use the embodiment of the invention to dash the time slot structure that is proposed.
More than the method for the radio frame transmission in the embodiment of the invention is described in detail, again the radio frame transmission system in the embodiment of the invention is described in detail below.
Figure 14 is the structure chart of radio frame transmission system in the embodiment of the invention.Shown in figure 14, this system comprises: base station 1401 and subscriber equipment (UE) 1402.
Said base station 1401; Be used to be provided for the structure of time slot of the time slot of wireless sub-frame; Wherein, include intermediate code, data symbol and protection former structure of time slot at interval and be set to only comprise data symbol and protection first structure of time slot at interval, be used for the downlink business time slot of wireless sub-frame; Be provided for second structure of time slot of the channel estimating time slot of wireless sub-frame, comprise in the said channel estimating time slot that protection is used for the channel estimation sequence of channel estimating with at least one at interval; Time slot according to having above-mentioned first structure of time slot or second structure of time slot forms wireless sub-frame waiting for transmission, utilizes the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission.
Said subscriber equipment 1402 is used to receive the above-mentioned wireless sub-frame that carries out full downlink traffic transmission, and wireless sub-frame is resolved.
Said base station 1401 comprises: wireless sub-frame is provided with module 1403 and professional transport module 1404.
Said wireless sub-frame is provided with module 1403; Be used to be provided for the structure of time slot of the time slot of wireless sub-frame; Wherein, include intermediate code, data symbol and protection former structure of time slot at interval and be set to only comprise data symbol and protection first structure of time slot at interval, be used for the downlink business time slot of wireless sub-frame; Be provided for second structure of time slot of the channel estimating time slot of wireless sub-frame, comprise in the said channel estimating time slot that protection is used for the channel estimation sequence of channel estimating with at least one at interval;
Said professional transport module 1404 is used for forming wireless sub-frame waiting for transmission according to the time slot with above-mentioned first structure of time slot or second structure of time slot, utilizes the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission.
Said subscriber equipment 1402 comprises: receiver module 1405 and detection module 1406.
Said receiver module 1405 is used to receive the wireless sub-frame that carries out professional transmission, and the wireless sub-frame that is received is offered detection module 1406.
Said detection module 1406 is used for the wireless sub-frame that receives is carried out joint-detection.
In addition, detection module 1406 can specifically comprise: channel estimating submodule 1407 and joint-detection submodule 1408.
Said channel estimating submodule 1407 is used for carrying out channel estimating according to the channel estimation sequence in the wireless sub-frame channel estimating time slot, obtains the channel estimation value of corresponding time slot; Obtain having the channel estimation value of the time slot of first structure of time slot according to the channel estimation value of channel estimating time slot; The channel estimation value of resulting each time slot is offered joint-detection submodule 1408.
Said joint-detection submodule 1408 is used to utilize the channel estimation value of each time slot that the channel estimating submodule provides, to the respective channel estimated value the data symbol of corresponding time slot carry out joint-detection.
Each module that above-mentioned subscriber equipment is inner and the specific operation process of submodule can be consistent with the operating process described in the method flow shown in Figure 2, give unnecessary details no longer one by one here.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.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 (12)
1. the transmission method of a wireless sub-frame is characterized in that, this method comprises:
Include intermediate code, data symbol and protection former time slot at interval and be set to only comprise data symbol and protection downlink business time slot at interval;
Be provided for the channel estimating time slot of wireless sub-frame, in said channel estimating time slot, comprise that protection is used for the channel estimation sequence of channel estimating with at least one at interval;
According to above-mentioned downlink business time slot and/or channel estimating time slot, form wireless sub-frame waiting for transmission, utilize the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission.
2. method according to claim 1 is characterized in that: also comprise data symbol in the said channel estimating time slot.
3. method according to claim 1 is characterized in that, said formation wireless sub-frame waiting for transmission comprises:
In each code channel; Spreading code and scrambler according to each code channel carry out spread spectrum and scrambling process to the data or the channel estimation sequence of required processing; To pass through data or channel estimation sequence after spread spectrum and the scrambling process then and carry out framing and handle, form said wireless sub-frame waiting for transmission.
4. method according to claim 3 is characterized in that: comprise in the said wireless sub-frame waiting for transmission that at least one downlink business time slot that passes through after being provided with passes through the channel estimating time slot after being provided with at least one.
5. method according to claim 1 is characterized in that, also comprise before the said formation wireless sub-frame waiting for transmission: in described wireless sub-frame waiting for transmission, add downlink synchronization slot, said downlink synchronization slot is used to carry out down-going synchronous.
6. according to each described method in the claim 1 to 5, it is characterized in that this method further comprises:
The wireless sub-frame waiting for transmission that forms is sent to subscriber equipment; Subscriber equipment carries out joint-detection to received above-mentioned wireless sub-frame.
7. method according to claim 6 is characterized in that, said subscriber equipment carries out joint-detection to received above-mentioned wireless sub-frame and comprises:
Channel estimation sequence according in each channel estimating time slot of said wireless sub-frame is carried out channel estimating, according to resulting channel estimation value the data symbol in the time slot of the pairing said wireless sub-frame of this channel estimation value is carried out joint-detection;
Obtain the channel estimation value of said downlink business time slot according to the channel estimation value of channel estimating time slot, and the data symbol in the said downlink business time slot is carried out joint-detection.
8. method according to claim 7 is characterized in that, the channel estimation value that said channel estimation value according to the channel estimating time slot obtains said downlink business time slot comprises:
Channel estimation value according at least two adjacent channel estimating time slots carries out interpolative operation, obtains the channel estimation value that these two adjacent channels are estimated the said downlink business time slot between the time slot;
Perhaps, with the channel estimation value of channel estimating time slot directly as the channel estimation value of adjacent said downlink business time slot.
9. method according to claim 7 is characterized in that, saidly carries out channel estimating according to the channel estimation sequence in each channel estimating time slot of said wireless sub-frame and comprises:
When being provided with at least two channel estimation sequence in the same channel estimating time slot, carry out channel estimating respectively according to each channel estimation sequence, comprehensive income to each channel estimation results obtain the channel estimation value of this channel estimating time slot.
10. a base station is characterized in that, this base station comprises: wireless sub-frame is provided with module and professional transport module;
Said wireless sub-frame is provided with module; Be used for being provided with the time slot of wireless sub-frame; Wherein, Include intermediate code, data symbol and protection former time slot at interval and be set to only comprise data symbol and protection downlink business time slot at interval, be provided for the channel estimating time slot of wireless sub-frame, comprise in the said channel estimating time slot that protection is used for the channel estimation sequence of channel estimating with at least one at interval;
Said professional transport module is used for forming wireless sub-frame waiting for transmission according to above-mentioned downlink business time slot and/or channel estimating time slot, utilizes the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission.
11. a subscriber equipment is characterized in that, this subscriber equipment comprises: receiver module and detection module;
Said receiver module is used to receive the wireless sub-frame that carries out professional transmission, and the wireless sub-frame that is received is offered detection module; Wherein, only comprise data symbol and protection interval in the downlink business time slot of said wireless sub-frame, and be provided with the channel estimating time slot in the said wireless sub-frame; In said channel estimating time slot, comprise that protection is used for the channel estimation sequence of channel estimating with at least one at interval;
Said detection module is used for the wireless sub-frame that receives is carried out joint-detection;
Said detection module comprises: channel estimating submodule and joint-detection submodule;
Said channel estimating submodule is used for carrying out channel estimating according to the channel estimation sequence in the wireless sub-frame channel estimating time slot, obtains the channel estimation value of corresponding time slot; Obtain the channel estimation value of downlink business time slot according to the channel estimation value of channel estimating time slot; The channel estimation value of resulting each time slot is offered the joint-detection submodule;
Said joint-detection submodule is used to utilize the channel estimation value of each time slot that the channel estimating submodule provides, to the respective channel estimated value the data symbol of corresponding time slot carry out joint-detection.
12. a radio frame transmission system is characterized in that, this system comprises: base station and subscriber equipment;
Said base station; Be used for being provided with the time slot of wireless sub-frame; Wherein, Include intermediate code, data symbol and protection former time slot at interval and be set to only comprise data symbol and protection downlink business time slot at interval, be provided for the channel estimating time slot of wireless sub-frame, comprise in the said channel estimating time slot that protection is used for the channel estimation sequence of channel estimating with at least one at interval; According to above-mentioned downlink business time slot and/or channel estimating time slot, form wireless sub-frame waiting for transmission, utilize the wireless sub-frame waiting for transmission of said formation to carry out full downlink traffic transmission;
Said subscriber equipment is used to receive the above-mentioned wireless sub-frame that carries out full downlink traffic transmission, and wireless sub-frame is resolved.
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| CN113439421B (en) * | 2021-03-22 | 2023-05-23 | 北京小米移动软件有限公司 | Combined channel estimation method and device |
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| CN1674455A (en) * | 2004-03-25 | 2005-09-28 | 皇家飞利浦电子股份有限公司 | Method and apparatus for realizing down link joint detection in TDD CDMA communication system |
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| CN1622653A (en) * | 2003-11-28 | 2005-06-01 | 皇家飞利浦电子股份有限公司 | Apparatus and method for frequency estimation of TD-SCDMA system downlink |
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