CN107453850B - Detection method of physical uplink control channel - Google Patents
Detection method of physical uplink control channel Download PDFInfo
- Publication number
- CN107453850B CN107453850B CN201610370637.9A CN201610370637A CN107453850B CN 107453850 B CN107453850 B CN 107453850B CN 201610370637 A CN201610370637 A CN 201610370637A CN 107453850 B CN107453850 B CN 107453850B
- Authority
- CN
- China
- Prior art keywords
- interference
- detection
- pucch
- time slots
- weighting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
Abstract
The application discloses a detection method of a Physical Uplink Control Channel (PUCCH), which comprises the following steps: receiving a transmission signal on a PUCCH on two slots; carrying out interference detection on the transmission signals of the two time slots, judging the interference time slot according to the interference detection, and carrying out weighting processing on the transmission signals of the two time slots; the weighting coefficient of the transmission signal of the time slot with large interference is a numerical value smaller than 1, the transmission signal of the non-interference or interference small time slot is unchanged, and the weighting coefficient is determined by simulation according to the relative relation of the interference signal intensity of the two time slots; and carrying out PUCCH detection on the transmission signals after the weighting processing. By the application, the detection performance of the PUCCH can be improved in an interference environment.
Description
Technical Field
The present application relates to a channel detection technology in a communication system, and in particular, to a method for detecting a Physical Uplink Control Channel (PUCCH).
Background
In an actual networking environment, an lte (long Term evolution) system often encounters a situation of large interference at an edge of an operating frequency band. The Physical Uplink Control Channel (PUCCH) is located at both ends of the operating frequency band in two slots of one subframe. As shown in FIG. 1, the number of Resource Blocks (RBs) in the whole bandwidth is counted as
The RB index is denoted as nPRBIn the range of
There are two slots in a subframe, slot 0 and slot 1. One physical control channel is composed of RBs at both ends of the system operating band in two slots, respectively, i.e., RB resources having the same padding pattern in the drawing.
In the PUCCH format 1/1a/1b, two slots perform block spreading and spectrum spreading operations on a SR/ACK/NACK modulation symbol in time and frequency domains, the two slots carry the same information, and the receiving end performs combined detection on the received signals of the two slots, and if the signal of one slot is seriously interfered, the PUCCH signal detection performance is lost, thereby reducing the system throughput.
Fig. 2 is a schematic diagram of a current PUCCH detection process. In the context of figure 2 of the drawings,pilot received signal
And data receiving signal
Respectively with local pilot sequences RSslotAnd a Data sequence DataslotAnd (4) making correlation, and judging a correlation result by a maximum likelihood method so as to output a detection result. Where slot denotes a slot index and nr denotes an antenna index.
When the PUCCH detection is performed according to the method shown in fig. 2, if a system has a large interference signal on one side, the received signal of the corresponding slot will be distorted seriously, which greatly affects the PUCCH detection performance.
Disclosure of Invention
The application provides a PUCCH detection method which can improve the detection performance of the PUCCH in an interference environment.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a detection method of a Physical Uplink Control Channel (PUCCH) comprises the following steps:
receiving a transmission signal on a PUCCH on two slots;
carrying out interference detection on transmission signals of two time slots, and carrying out weighting processing on the transmission signals of the two time slots when at least one time slot of the two time slots has interference; wherein, the weighting coefficient of the transmission signal of the time slot with large interference is smaller than the weighting coefficient of the transmission signal of the time slot with non-interference or small interference;
and carrying out PUCCH detection on the transmission signals after the weighting processing.
Preferably, the weighting coefficients of the two time slots are determined by simulation according to the relative relationship of the interference signal strengths of the two time slots.
Preferably, the performing PUCCH detection on the weighted transmission signal includes: and correcting a detection threshold according to the detection result of the interference detection, and performing PUCCH detection by using the corrected detection threshold.
Preferably, the method further comprises: when no interference exists in the two time slots, the transmission signals of the two time slots are not weighted and PUCCH detection is directly carried out.
According to the technical scheme, in the application, the transmission signals on the PUCCH are received on two time slots; carrying out interference detection on transmission signals of two time slots, and carrying out weighting processing on the transmission signals of the two time slots when at least one time slot of the two time slots has interference; wherein, the weighting coefficient of the transmission signal of the time slot with large interference is smaller than that of the transmission signal of the time slot without interference or with small interference. Whether interference exists in the transmission signal of the PUCCH is determined through interference detection introduced in the processing process, and the transmission signal is weighted in advance when the interference exists, so that the detection performance of the PUCCH can be improved in an interference environment.
Drawings
Fig. 1 is a schematic diagram of the location of PUCCH resources in one subframe;
fig. 2 is a basic flow diagram of a current PUCCH detection method;
fig. 3 is a schematic basic flow chart of a PUCCH detection method in the present application;
fig. 4 is a schematic processing flow diagram of a PUCCH detection method in the embodiment of the present application;
fig. 5 is a schematic diagram illustrating comparison of the performance of the PUCCH detection method in the present application and the PUCCH detection method in the background art.
Detailed Description
For the purpose of making the objects, technical means and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings.
The basic idea of the application is: interference detection is performed on received signals on two slots of the PUCCH in advance, and signal detection is performed in a targeted manner according to an interference detection result.
Fig. 3 is a basic flowchart of a PUCCH detection method in the present application. As shown in fig. 3, the method includes:
in step 301, a transmission signal on the PUCCH is received on two slots.
The specific interference detection may be performed in the existing manner, for example, during the system silence time, power detection is performed on signals that can be received in the receiving frequency band, and the detected signal strength is the strength of the interference signal. The method for determining whether there is interference may be: and when the strength of the detected interference signal reaches a set interference detection threshold, determining that interference exists.
Wherein, the weighting coefficient of the transmission signal of the time slot with large interference is smaller than that of the transmission signal of the time slot without interference or with small interference. In general, the non-interference or small-interference time slot may not be weighted, that is, the weighting coefficient is set to 1, in this case, the weighting coefficient of the large-interference time slot is a value smaller than 1; alternatively, the weighting process may be performed for a slot with low interference, and in this case, the weighting coefficient of the slot with low interference is larger than that of the slot with high interference. The weighting factor may be predetermined, for example, determined by simulation based on the relative relationship between the interference signal strengths of the two time slots.
Here, the time slot with large interference and the time slot with small interference mean: two time slots of the received signal are compared to a time slot with greater interference and a time slot with less interference. The magnitude of the interference value may be an absolute value of the interference signal strength determined after the interference detection, or the magnitude of the interference value may also refer to an interference level to which the determined absolute value of the interference signal strength belongs. For example, a plurality of interference levels are preset, and if interference exists in both slots, although the strength values of the interference signals of the two slots are not completely the same, the interference values of the two slots are considered to be the same.
Through the weighting processing, the influence of the transmission signal of the interference time slot on the subsequent detection judgment is correspondingly reduced when the interference detection is carried out subsequently, and the detection performance of the PUCCH is favorably improved.
When the PUCCH is detected, preferably, the detection threshold may be modified according to the detection result of the interference detection, and the PUCCH detection may be performed using the modified detection threshold, so that the detection threshold may be matched with the transmission signal after the weighting processing, and the PUCCH detection performance is ensured.
So far, the basic method flow of PUCCH detection in the present application is ended. In the above process, for compatibility with the existing PUCCH detection method, when it is detected that there is no interference in both slots, PUCCH detection may be directly performed in the existing manner without performing weighting processing on transmission signals of both slots.
The following describes a specific implementation of the PUCCH detection method according to the present application with a specific embodiment.
Fig. 4 is a schematic processing flow diagram of a PUCCH detection method in the embodiment of the present application. In this embodiment, in order to be compatible with the detection method of the PUCCH in the non-interference scenario, an interference indication is added after the data received in the PUCCH format 1/1a/1b, and the interference detection module obtains an indication of whether there is interference on the sideband, so as to determine a weight of the data received in the corresponding slot, and correct a dtx (discontinuous transmission) decision threshold. Other processing is the same as the PUCCH detection of two slots described in the background art.
As shown in fig. 4, the specific implementation steps are as follows:
step one, an interference detection module carries out interference detection on a channel of the PUCCH, indicates whether interference exists in a time slot where the PUCCH is located, and a system judges whether weighting processing needs to be carried out on a time slot receiving signal in the PUCCH format 1/1a/1 b.
And judging whether the time slot of the PUCCH has interference according to the interference detection result, and determining to perform weighting processing if the interference value reaches a set interference detection threshold.
Step two, if the weighting processing of the received signals is needed, multiplying the received signals of the two time slots by corresponding weighting coefficients according to the detection result; if the weighting processing of the received signal is not needed, the procedure goes to step three directly.
The setting of the weighting coefficients may be according to the foregoing step 302, and will not be described herein again.
Step three, calculating the cross-correlation value sum of the pilot frequency symbols of each symbol and each time slot of each receiving antenna
Cross correlation value of data symbols
Step four, utilizing
And
carrying out ACK/NACK/DTX detection, and correcting a DTX decision threshold when the received signals of the two time slots are subjected to weighting processing through the second step; and when the received signals of the two time slots do not execute the step two and directly execute the step three, the DTX decision threshold is not corrected.
The existing DTX decision threshold is mainly a simulation experience value. For convenience, the DTX decision threshold may be modified as follows: and correcting the DTX decision threshold in proportion according to the weighting coefficient of the time slot receiving signal. For example, assuming that the DTX decision threshold is N when unweighting is performed, interference detection finds that interference in a certain time slot is serious, interference in another time slot is very small, and the interference does not reach the lowest interference detection threshold, the weighting coefficients of received signals in the two time slots are 0 and 1 respectively, that is, only single-time-slot detection is performed, and simulation verification shows that the DTX decision threshold in this scenario is M, and the corrected decision threshold is M
Only the original DTX detection threshold needs to be multiplied by a constant
That is, for the same reason, the proportionality constant exists between other weighting coefficient relations
Thereby realizing the correction of the DTX detection threshold.
The PUCCH detection method in the embodiment of the present application is ended.
As can be seen from the above detailed description of the present application, in the present application, whether the sideband where the PUCCH is located has interference or not and the band region where the interference is located are determined by using the output indication of the interference detection, an indication switch is set, and the PUCCH detection is performed after the received signals of the interference slot and the non-interference slot are multiplied by different weights. During detection, the detection threshold needs to be corrected, the difference between the detection thresholds is a constant, and the threshold is correspondingly changed while the switch is switched.
In order to illustrate the performance of the PUCCH detection method in the present application, the background art and the PUCCH detection method in the present application are simulated in a simulation scenario in which an interference signal is added to a frequency band where the PUCCH is located. The single time slot detection means that the weight of a received signal of an interference time slot in the PUCCH detection method is set to be zero, and the weight of a non-interference time slot is set to be 1. The double-slot detection is a PUCCH detection method in the background technology, and the received signals of two slots are directly used for detection without weighting pretreatment. Fig. 5 is a performance comparison diagram of simulation results, and it can be seen from fig. 5 that the performance of the detection for weighting the two-slot received signals in the present application is significantly better than that of the two-slot detection in the background art.
In the processing of the present application, the system detection mode can be set according to information of an interference frequency band to which the system is subjected. When a communication system is interfered at a certain sideband, PUCCH detection is carried out in a mode of weighting a receiving signal of a time slot, so that the detection performance loss can be reduced.
More specifically, the present application has the following advantages through the processing of the present application:
1. the PUCCH processing flow and architecture are not changed. Carrying out weighting pretreatment on the received signals, and simultaneously changing corresponding detection threshold values to realize detection compatibility under interference and non-interference scenes;
2. under the condition that one side has large interference, the detection performance of the weighting processing mode of the input signal is superior to the double-sideband detection performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. A method for detecting a Physical Uplink Control Channel (PUCCH) is characterized by comprising the following steps:
receiving a transmission signal on a PUCCH on two slots;
carrying out interference detection on transmission signals of two time slots, and carrying out weighting processing on the transmission signals of the two time slots when at least one time slot of the two time slots has interference; the transmission signals of the same time slot correspond to a weighting coefficient, and the weighting coefficient of the transmission signal of the time slot with large interference is smaller than the weighting coefficient of the transmission signal of the time slot with non-interference or small interference;
carrying out PUCCH detection on the transmission signals after weighting processing;
the PUCCH detection of the transmission signal after the weighting process includes: and correcting a detection threshold according to the detection result of the interference detection, and performing PUCCH detection by using the corrected detection threshold.
2. The method of claim 1, wherein the weighting coefficients of the two time slots are determined by simulation based on the relative relationship between the strengths of the interference signals of the two time slots.
3. A method according to claim 1 or 2, characterized in that the method further comprises: when no interference exists in the two time slots, the transmission signals of the two time slots are not weighted and PUCCH detection is directly carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610370637.9A CN107453850B (en) | 2016-05-30 | 2016-05-30 | Detection method of physical uplink control channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610370637.9A CN107453850B (en) | 2016-05-30 | 2016-05-30 | Detection method of physical uplink control channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107453850A CN107453850A (en) | 2017-12-08 |
| CN107453850B true CN107453850B (en) | 2020-10-20 |
Family
ID=60484897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610370637.9A Expired - Fee Related CN107453850B (en) | 2016-05-30 | 2016-05-30 | Detection method of physical uplink control channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107453850B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11186958A (en) * | 1997-12-24 | 1999-07-09 | Nec Corp | Automatic gain control method for receiver for frequency hopping communication |
| CN1346525A (en) * | 1999-03-26 | 2002-04-24 | 诺基亚网络有限公司 | Beamforming method and device |
| CN1933361A (en) * | 2006-10-18 | 2007-03-21 | 普天信息技术研究院 | Up inserting detection method |
| CN101098208A (en) * | 2006-06-27 | 2008-01-02 | 大唐移动通信设备有限公司 | TD-SCDMA associated detection technology based channel estimation method |
| CN101588335A (en) * | 2008-05-19 | 2009-11-25 | 三星电子株式会社 | Utilize the MIMO detection method and the system of channel relevancy |
-
2016
- 2016-05-30 CN CN201610370637.9A patent/CN107453850B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11186958A (en) * | 1997-12-24 | 1999-07-09 | Nec Corp | Automatic gain control method for receiver for frequency hopping communication |
| CN1346525A (en) * | 1999-03-26 | 2002-04-24 | 诺基亚网络有限公司 | Beamforming method and device |
| CN101098208A (en) * | 2006-06-27 | 2008-01-02 | 大唐移动通信设备有限公司 | TD-SCDMA associated detection technology based channel estimation method |
| CN1933361A (en) * | 2006-10-18 | 2007-03-21 | 普天信息技术研究院 | Up inserting detection method |
| CN101588335A (en) * | 2008-05-19 | 2009-11-25 | 三星电子株式会社 | Utilize the MIMO detection method and the system of channel relevancy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107453850A (en) | 2017-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9461807B2 (en) | Transmitting device and transmitting method | |
| US20130005269A1 (en) | Method and Apparatus for Reducing Co-Channel Interference | |
| KR102191290B1 (en) | Method and apparatus for estimate communication channel in mobile communication system | |
| CN103155502B (en) | Interference signal parameters method of estimation and device | |
| EP3220564B1 (en) | Data transmission method and device | |
| KR102244207B1 (en) | Apparatus and method for downlink channel estimation in wireless communication system | |
| CN103179670A (en) | Method and device of transmission channel | |
| EP3282603A1 (en) | Interference cancellation method and base station apparatus therefor | |
| EP3264647B1 (en) | Terminal apparatus, base station apparatus, and communication method | |
| CN104081674A (en) | Extending the set of addressable interferers for interference mitigation | |
| CN108494525B (en) | Self-adaptive selection method for combining repetition times and transmission block size in NB-IoT (NB-IoT) | |
| CN103916229A (en) | Interference suppression method and device | |
| US20130279547A1 (en) | Blind Detection of Modulation Configuration for Interfering Signals | |
| EP2962415B1 (en) | Signal detection method and apparatus | |
| CN104854833A (en) | Tracking received power in wireless communications | |
| CN107453850B (en) | Detection method of physical uplink control channel | |
| KR101670599B1 (en) | Hybrid Receiver based on System Level Simulation in Backhaul System | |
| CN113424504A (en) | Wireless telecommunications base station and procedure for high mobility scenarios | |
| CN107205273B (en) | DCI blind detection data processing method and device | |
| TWI590597B (en) | Radio communication devices and methods for controlling a radio communication device | |
| CN112055379B (en) | Method and device for measuring interference noise intensity | |
| KR102375186B1 (en) | Apparatus and method for performing channel decoding operation in communication system | |
| CN107204817B (en) | Interference detection method and terminal | |
| US20170181168A1 (en) | Communication device and method for processing a signal | |
| CN112449413B (en) | Power indication method, power determination device, network equipment and terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201020 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |