CN108282421A - A kind of method of uplink control channel offset estimation - Google Patents
A kind of method of uplink control channel offset estimation Download PDFInfo
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- CN108282421A CN108282421A CN201710006422.3A CN201710006422A CN108282421A CN 108282421 A CN108282421 A CN 108282421A CN 201710006422 A CN201710006422 A CN 201710006422A CN 108282421 A CN108282421 A CN 108282421A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
This application discloses a kind of uplink control channel frequency deviation estimating methods, including：For the newest frequency deviation value that each user setting memory k, the interior user of storage setting time are measured, if frequency deviation is just, k=0；Otherwise k=1；The data for receiving the PRB where PUCCH format 2a or PUCCH format 2b carry out data despreading for each user；1st Slot symbol 1 obtains H11 after de-spreading, the 1st Slot symbol 5 obtains G15 after de-spreading, the 2nd Slot symbol 1 obtains H21 after de-spreading, the 2nd Slot symbol 5 obtains G25 after de-spreading；Calculate phase angleAnd according to k values pairIt is modified；On the basis of the channel estimation value of symbol 1 in each time slot, the channel estimation value of other each orthogonal frequency division multiplex OFDM symbols is calculated separately.Using technical solution disclosed in the present application, offset estimation when uplink control channel transmitting channel state information (CSI) under high-speed case can be solved the problems, such as.
Description
Technical field
This application involves mobile communication technology field, more particularly to a kind of method of uplink control channel offset estimation.
Background technology
In a communications system, the high-speed motion of terminal can cause Doppler frequency shift.For example, if terminal is with 300km/h's
Speed travels, and carrier frequency 2.6GHz, the then maximum doppler frequency generated is about 722Hz.In the uplink, it is moved by terminal
Caused Doppler frequency shift is at most by twice maximum Doppler frequency offset, that is to say, that when terminal is with the speed row of 300km/h
It sails, under conditions of not considering down-going synchronous error, uplink frequency offset can at most reach 1444Hz.Under this Frequency Offset,
If do not taken some measures, upstream data will be unable to be properly received.
In existing frequency excursion algorithm, some carries out utilizing physical uplink in offset estimation, such as LTE using pilot tone
The phase difference of two row pilot tones in subframe of channel (PUSCH) is shared to carry out offset estimation；Also have and utilize cyclic prefix
(CP) technology of offset estimation is carried out in time domain.But LTE uplink control channels, which are multiple users, carries out code division multiplexing, it is multiple
The control information of user is transmitted on the same resource block (RB) block, therefore can not carry out offset estimation with above-mentioned existing method,
Also the frequency offset calculation of multiple users in LTE uplink control channels can not just be come out, therefore frequency deviation compensation can not be carried out, caused
The receptivity of LTE uplink control channels is deteriorated under high-speed case.
Invention content
This application provides a kind of methods of uplink control channel offset estimation, are believed with solving upload control under high-speed case
Offset estimation problem when road transmitting channel state information (CSI).
This application provides a kind of uplink control channel frequency deviation estimating methods, including：
For each user setting memory k, the newest frequency deviation value that the user measures in setting time is stored, if frequency deviation
For just, then k=0；Otherwise k=1；
Receive the number of the Physical Resource Block PRB where Physical Uplink Control Channel PUCCH format 2a or PUCCH format 2b
According to for each user progress data despreading；
1st Slot symbol 1 obtains H11 after de-spreading, the 1st Slot symbol 5 obtains G15, the 2nd Slot symbol after de-spreading
H21 is obtained after 1 despreading, the 2nd Slot symbol 5 obtains G25 after de-spreading；
Calculate phase angleAnd according to k values pairIt is modified；
On the basis of the channel estimation value of symbol 1 in each time slot, other each orthogonal frequency division multiplex OFDM symbols are calculated separately
Number channel estimation value.
Preferably, described according to k values pairBe modified including：IfAnd k=1, thenIfAnd k=0, thenIn the case of otherIt is worth constant.
Preferably, on the basis of the channel estimation value of the symbol 1 in each time slot, other each orthogonal frequencies are calculated separately
Multiplexing OFDM symbol channel estimation value include：
Calculate the phase difference between adjacent-symbol：
According toThe channel estimation value of each Slot symbol 0 is calculated,
And so on.
As seen from the above technical solution, uplink control channel frequency deviation estimating method provided by the present application, by each to use
Memory k is arranged in family, stores the newest frequency deviation value that the user measures in setting time, if frequency deviation is just, k=0；Otherwise
K=1；The data for receiving the PRB where PUCCH format 2a/2b carry out data despreading for each user；By the 1st, 2 time slot
Symbol 1 and symbol 5 de-spread obtain H11, G15, H21 and G25 respectively, and calculate phase angleThen according to k values pairIt is modified；And with the letter of symbol 1 in each time slot
On the basis of road estimated value, the channel estimation value of other each orthogonal frequency division multiplex OFDM symbols is calculated separately, so as to solve height
Offset estimation problem in the case of speed when uplink control channel transmission CSI information.
Description of the drawings
Fig. 1 is that the symbol of existing PUCCH format 2 occupies schematic diagram；
Fig. 2 is the flow diagram of uplink control channel frequency deviation estimating method of the present invention.
Specific implementation mode
To make the object, technical solution and advantage of the application be more clearly understood, develop simultaneously embodiment referring to the drawings, right
The application is described in further detail.
In LTE, uplink control channel Physical Uplink Control Channel (PUCCH) format 2,2a, 2b transmission is down channel
Channel state information (CSI).In PUCCH format 2, data occupy 5 symbols in each time slot, and pilot tone occupies 2 symbols, such as
Shown in Fig. 1：Symbol 1 and symbol 5 are used for transmission pilot tone, and symbol 0,2,3,4 and 6 is used for transmission data.
In PUCCH format 2a and 2b, the pilot frequency locations transmission of the symbol 5 of each time slot is ACK/NACK information, because
This, each time slot only has a row pilot tone in PUCCH 2a and 2b.
In LTE, the downlink CSI information of multiple users is multiplexed together by Spread Spectrum Sequences point, then in PUCCH
It is transmitted on 2X.At high speeds, due to the influence of Doppler frequency shift, the receptivity of PUCCH 2X is caused to be deteriorated, it can not
It is correctly obtained the CSI information of user.For this purpose, the present invention proposes the offset estimation side when transmitting PUCCH2a and PUCCH2b
Method, so as to improve the channel information of highspeed user.Specific method is as shown in Fig. 2, include the following steps：
Step 1：Each user setting memory k, the newest frequency deviation value that the user measures in storage a period of time, if
Frequency deviation is just then k=0；Otherwise k=1.
Step 2：Receive the data of the Physical Resource Block (PRB) where PUCCH format 2a/2b.
Step 3：Data despreading is carried out for each user.Here, it is to carry out data despreading with local sequence with channel to estimate
Meter.
Step 4：1st Slot symbol 1 obtains H11 after de-spreading, the 1st Slot symbol 5 obtains G15 after de-spreading, at the 2nd
Gap symbol 1 and symbol 5 respectively obtain H21 and G25 after de-spreading.
Step 5：Relevant operation is done respectively with H11 and G15 and H21 and G25, and phase angle is taken to sum of the two, is obtained
Phase angle
Step 6：According to the value pair of kValue is modified, and specially carries out following judgements：IfAnd k=1, thenIfAnd k=0, thenOther situationsIt is worth constant.Wherein, pi indicates pi
π。
Step 7：Calculate the phase difference between adjacent-symbol：With the channel estimation value of symbol 1 in each time slot
On the basis of, calculate separately the channel estimation value of other each OFDM symbols.For example, being with the channel estimation value of the 1st Slot symbol 1
Basis, calculating symbol 0,2,3,..., 6 channel estimation value.It is shown below：
Step 8：It is detected according to channel estimation value and receives CSI and ACK/NACK information.
The foregoing is merely the preferred embodiments of the application, not limiting the application, all essences in the application
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of the application protection god.
Claims (3)
1. a kind of uplink control channel frequency deviation estimating method, which is characterized in that including：
For each user setting memory k, the newest frequency deviation value that the user measures in setting time is stored, if frequency deviation is
Just, then k=0；Otherwise k=1；
Receive the data of the Physical Resource Block PRB where Physical Uplink Control Channel PUCCH format 2a or PUCCH format 2b, needle
Data despreading is carried out to each user；
1st Slot symbol 1 obtains H11 after de-spreading, the 1st Slot symbol 5 obtains G15 after de-spreading, the 2nd Slot symbol 1 solves
H21 is obtained after expansion, the 2nd Slot symbol 5 obtains G25 after de-spreading；
Calculate phase angleAnd according to k values pairIt is modified；
On the basis of the channel estimation value of symbol 1 in each time slot, other each orthogonal frequency division multiplex OFDM symbols are calculated separately
Channel estimation value.
2. according to the method described in claim 1, it is characterized in that：
It is described according to k values pairBe modified including：IfAnd k=1, thenIfAnd k=
0, thenIn the case of otherIt is worth constant.
3. method according to claim 1 or 2, it is characterised in that：
On the basis of the channel estimation value of the symbol 1 in each time slot, other each orthogonal frequency division multiplex OFDM symbols are calculated separately
Number channel estimation value include：
Calculate the phase difference between adjacent-symbol：
According toThe channel estimation value for calculating each Slot symbol 0, with this
Analogize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710006422.3A CN108282421B (en) | 2017-01-05 | 2017-01-05 | Method for estimating frequency offset of uplink control channel |
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| CN201710006422.3A CN108282421B (en) | 2017-01-05 | 2017-01-05 | Method for estimating frequency offset of uplink control channel |
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| CN108282421B CN108282421B (en) | 2020-11-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011945A (en) * | 2019-04-22 | 2019-07-12 | 武汉虹信通信技术有限责任公司 | PUCCH processing method and processing device |
| CN113489661A (en) * | 2021-07-19 | 2021-10-08 | 杭州红岭通信息科技有限公司 | Channel estimation method of uplink control channel |
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| CN103516654A (en) * | 2012-06-20 | 2014-01-15 | 华为技术有限公司 | Frequency offset estimation method and system |
| CN104243381A (en) * | 2013-06-09 | 2014-12-24 | 普天信息技术研究院有限公司 | Method for uplink control channel frequency synchronization |
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| CN110011945A (en) * | 2019-04-22 | 2019-07-12 | 武汉虹信通信技术有限责任公司 | PUCCH processing method and processing device |
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| CN113489661A (en) * | 2021-07-19 | 2021-10-08 | 杭州红岭通信息科技有限公司 | Channel estimation method of uplink control channel |
| CN113489661B (en) * | 2021-07-19 | 2024-02-13 | 杭州红岭通信息科技有限公司 | Channel estimation method of uplink control channel |
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| CN108282421B (en) | 2020-11-27 |
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