CN110278018B - Maximum ratio combining detection method and device, storage medium and electronic equipment - Google Patents
Maximum ratio combining detection method and device, storage medium and electronic equipment Download PDFInfo
- Publication number
- CN110278018B CN110278018B CN201810205836.3A CN201810205836A CN110278018B CN 110278018 B CN110278018 B CN 110278018B CN 201810205836 A CN201810205836 A CN 201810205836A CN 110278018 B CN110278018 B CN 110278018B
- Authority
- CN
- China
- Prior art keywords
- path
- determining
- energy
- target
- initial
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
- H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
- H04W40/16—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality based on interference
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present disclosure relates to a method, an apparatus, a storage medium, and an electronic device for detecting maximum ratio combining, the method comprising: acquiring energy values of sampling points corresponding to multipath in each cell of an active set; determining a target path from the multipath according to the energy values of the sampling points; acquiring the receiving quality of each cell through the energy value of the sampling point of the target path; and screening out a target cell from the cells according to the receiving quality, and detecting the maximum ratio combination of the receiver through the target cell.
Description
Technical Field
The present disclosure relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for detecting maximum ratio combining, a storage medium, and an electronic device.
Background
Since the multipath effect is caused by diffraction and diffraction of wireless signals in the channel communication process, the RAKE receiver can receive and demodulate the multipath signals in the multipath by using the multipath effect, and then combine the demodulated multipath signals according to the maximum ratio to obtain the best receiving benefit, therefore, the RAKE receiving technology is currently a diversity receiving technology commonly used in WCDMA (Wideband Code division multiple access; WCDMA) mobile communication systems.
However, since the signal strength of each cell in the active set is different and the mutual interference between the cells is strong, the signal strength of the cells changes greatly with the movement of the user terminal (for example, the user terminal performs mobile soft handover), and at this time, if the reception quality of signals of a part of the cells becomes poor, the part of the cells may deteriorate the cells with better reception quality, thereby affecting the reliability of the maximum ratio combining of the Rake receiver.
Disclosure of Invention
In order to solve the above problems, the present disclosure proposes a maximum ratio combining detection method, apparatus, storage medium, and electronic device.
According to a first aspect of the embodiments of the present disclosure, there is provided a method for detecting maximal ratio combining, applied to a receiver, including:
acquiring sampling point energy values corresponding to multipath in each cell of an active set;
determining a target path from the multi-paths according to the energy values of the sampling points;
acquiring the receiving quality of each cell through the energy value of the sampling point of the target path;
and screening out a target cell from the cells according to the receiving quality, and detecting the maximum ratio combination of the receiver through the target cell.
Optionally, the acquiring an energy value of a sampling point corresponding to a multipath in each cell of the active set includes:
determining the window center of a search window of each cell of the active set according to the energy value of a historical sampling point;
determining an offset position of the multipath in each of the cells relative to the center of the window;
and carrying out coherent channel estimation and incoherent channel estimation through the offset position to sequentially obtain a first estimation value and a second estimation value, and acquiring the energy value of the sampling point corresponding to the multipath according to the first estimation value and the second estimation value.
Optionally, the determining a target path from the multipaths according to the sample point energy values comprises:
screening at least one initial path from the multipath according to the energy values of the sampling points;
and determining the target path according to the initial path.
Optionally, the screening at least one initial path from the multi-paths according to the energy values of the sampling points includes:
determining the multipath of which the energy value of the sampling point is greater than or equal to a first screening parameter as the initial path; or the like, or, alternatively,
determining a preset number of multipaths as the initial paths according to the sequence of the energy values of the sampling points from large to small; or the like, or, alternatively,
And determining the multipath with the sampling point energy value larger than or equal to the first screening parameter as the initial path to be determined, and determining the initial paths to be determined in the preset number as the initial paths according to the sequence of the sampling point energy values from large to small.
Optionally, before the determining that the multipath with the energy value of the sampling point greater than or equal to the first screening parameter is the initial path, the method further includes:
determining a maximum sample point energy value from the sample point energy values;
and determining the first screening parameter according to the maximum sampling point energy value.
Optionally, when the initial path includes multiple paths, the determining the target path according to the initial path includes:
acquiring an energy failure area of each initial path; the energy failure area is an area where the energy value of the sampling point of the initial path is in a failure state;
determining whether the initial path is outside the energy failure region;
when the initial path is located outside the energy failure area, determining the initial path as a path to be determined;
and determining the target path according to the path to be determined.
Optionally, the acquiring the energy failure region of each initial path includes:
Acquiring an energy failure region of each initial path through a failure region acquisition step;
the failure region acquisition step includes:
acquiring a target initial path with energy value larger than the energy value of a sampling point of the current initial path from the plurality of initial paths;
and determining an energy failure region of the current initial path according to the target initial path.
Optionally, the determining the target path according to the path to be determined includes:
acquiring noise areas of all the paths to be determined;
acquiring a noise mean value according to the energy values of the sampling points in the noise area;
and acquiring the target path from the path to be determined according to the noise mean value.
Optionally, the obtaining the target path from the path to be determined according to the noise mean includes:
determining a second screening parameter according to the noise mean value and a first preset parameter;
and acquiring the target path from the path to be determined according to the second screening parameter.
Optionally, the obtaining the reception quality of each cell through the energy values of the sampling points of the target path includes:
acquiring the sum of the energy values of the sampling points of all the target paths;
Acquiring the total number of all the target paths;
and acquiring the receiving quality of each cell according to the sum value, the total number and the noise mean value.
Optionally, the screening out the target cell from the cells according to the reception quality includes:
obtaining a maximum reception quality from the reception qualities of all the cells;
determining a third screening parameter according to the maximum receiving quality and a second preset parameter;
and screening the target cell from the cells according to the third screening parameter.
According to a second aspect of the embodiments of the present disclosure, there is provided a maximum ratio combining detection apparatus, applied to a receiver, including:
the first acquisition module is used for acquiring the energy value of a sampling point corresponding to multipath in each cell of the active set;
the determining module is used for determining a target path from the multipath according to the energy values of the sampling points;
the second acquisition module is used for acquiring the receiving quality of each cell through the energy value of the sampling point of the target path;
and the processing module is used for screening out a target cell from the cells according to the receiving quality and detecting the maximum ratio combination of the receiver through the target cell.
Optionally, the first obtaining module includes:
the first determining submodule is used for determining the window center of a search window of each cell of the active set according to the energy value of a historical sampling point;
a second determining submodule, configured to determine offset positions of the multipaths in each of the cells with respect to the center of the window;
and the first obtaining submodule is used for carrying out coherent channel estimation and incoherent channel estimation through the offset position to sequentially obtain a first estimation value and a second estimation value, and obtaining the energy value of the sampling point corresponding to the multipath according to the first estimation value and the second estimation value.
Optionally, the determining module includes:
the first screening submodule is used for screening at least one initial path from the multipath according to the energy value of the sampling point;
and the third determining submodule is used for determining the target path according to the initial path.
Optionally, the first filtering sub-module is configured to determine, as the initial path, a multipath whose energy value of the sampling point is greater than or equal to a first filtering parameter; or the like, or, alternatively,
determining a preset number of multipaths as the initial paths according to the sequence of the energy values of the sampling points from large to small; or the like, or, alternatively,
And determining the multipath with the sampling point energy value larger than or equal to the first screening parameter as the initial path to be determined, and determining the initial paths to be determined in the preset number as the initial paths according to the sequence of the sampling point energy values from large to small.
Optionally, the determining module further comprises:
a fourth determining sub-module for determining a maximum sample point energy value from the sample point energy values;
and the fifth determining submodule is used for determining the first screening parameter according to the maximum sampling point energy value.
Optionally, when the initial path includes a plurality of paths, the third determining sub-module is configured to obtain an energy failure region of each initial path; the energy failure area is an area where the energy value of the sampling point of the initial path is in a failure state;
determining whether the initial path is outside the energy failure region;
when the initial path is located outside the energy failure area, determining the initial path as a path to be determined;
and determining the target path according to the path to be determined.
Optionally, the third determining submodule is configured to obtain an energy failure region of each initial path through a failure region obtaining step;
The failure region acquisition step includes:
acquiring a target initial path with energy value larger than the energy value of a sampling point of the current initial path from the plurality of initial paths;
and determining an energy failure area of the current initial path according to the target initial path.
Optionally, the third determining submodule is configured to acquire noise regions of all the paths to be determined;
acquiring a noise mean value according to the energy values of the sampling points in the noise area;
and acquiring the target path from the path to be determined according to the noise mean value.
Optionally, the third determining sub-module is configured to determine a second screening parameter according to the noise mean and a first preset parameter;
and acquiring the target path from the path to be determined according to the second screening parameter.
Optionally, the second obtaining module includes:
the second acquisition sub-module is used for acquiring the sum of the energy values of the sampling points of all the target paths;
a third obtaining submodule, configured to obtain the total number of all the target paths;
and the fourth obtaining submodule is used for obtaining the receiving quality of each cell according to the sum value, the total number and the noise mean value.
Optionally, the processing module includes:
a fifth obtaining sub-module, configured to obtain a maximum reception quality from the reception qualities of all the cells;
a sixth determining submodule, configured to determine a third filtering parameter according to the maximum receiving quality and a second preset parameter;
and the second screening submodule is used for screening the target cell from the cells according to the third screening parameter.
According to a third aspect of embodiments of the present disclosure, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
According to a fourth aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:
a memory having a computer program stored thereon; and
one or more processors configured to execute the programs in the memory to implement the steps of the method described above.
Through the technical scheme, the energy value of the sampling point corresponding to the multipath in each cell of the active set is obtained; determining a target path from the multi-paths according to the energy values of the sampling points; acquiring the receiving quality of each cell through the energy value of the sampling point of the target path; and screening a target cell from the cells according to the receiving quality, and detecting the maximum ratio combination of the receiver through the target cell, so that the target cell participates in the detection of the maximum ratio combination by screening the multipath in each cell, evaluating the receiving quality of the cell through the screened multipath, and filtering the cell according to the receiving quality to obtain the target cell, thereby improving the reliability of the maximum ratio combination of the receiver (such as a RAKE receiver) and improving the communication quality.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:
FIG. 1 is a flow chart illustrating a method of maximum ratio combining detection in accordance with an exemplary embodiment of the present disclosure;
FIG. 2 is a flow chart illustrating yet another method of maximum ratio combining detection in an exemplary embodiment of the present disclosure;
FIG. 3 is a block diagram of a first maximum ratio combining detection apparatus shown in an exemplary embodiment of the present disclosure;
FIG. 4 is a block diagram of a second maximum ratio combining detection apparatus shown in an exemplary embodiment of the present disclosure;
FIG. 5 is a block diagram of a third maximum ratio combining detection apparatus shown in an exemplary embodiment of the present disclosure;
FIG. 6 is a block diagram of a fourth maximum ratio combining detection apparatus shown in an exemplary embodiment of the present disclosure;
FIG. 7 is a block diagram of a fifth maximum ratio combining detection apparatus shown in an exemplary embodiment of the present disclosure;
FIG. 8 is a block diagram of a sixth maximum ratio combining detection apparatus shown in an exemplary embodiment of the present disclosure;
Fig. 9 is a block diagram of an electronic device shown in an exemplary embodiment of the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
First, an application scenario of the present disclosure is described, and the present disclosure may be applied to a scenario in which diversity reception is performed by a RAKE receiver, in the scenario, due to obstacles (such as buildings, hills, and the like) existing in a space in a land mobile channel, a multipath propagation phenomenon is generated, and then a multipath signal exists in a user terminal, in a WCDMA system, if a time delay between multipath signals is greater than or equal to a preset threshold, the RAKE receiver may separate the multipath signals in the air, and demodulate and combine the separated multipath signals, so as to eliminate differences in phase, frequency, amplitude, and the like between the multipath signals, thereby avoiding multipath fading of the signals, and improving communication quality.
In the related art, firstly, after receiving signals of different cells, the RAKE receiver can perform multipath search on each cell to obtain multipath signals, so as to obtain multipath delays of each multipath signal in each cell, and then, for each cell, according to the multipath delays of the searched multipath signals, a plurality of RAKE receiving branches can be used to demodulate the multipath signals respectively (including descrambling, despreading, channel estimation, channel deviation rectification and the like), so that after the demodulation, the phases of the data sequences output by each RAKE receiving branch are basically consistent, the weight of the multipath signal with large signal amplitude is large, and the weight of the multipath signal with small signal amplitude is small, so as to realize the best combining effect when each multipath signal is subjected to maximum ratio combining, but the multipath signals are subjected to maximum ratio combining in the manner, there are the following problems: when a weak cell with poor reception quality exists in the plurality of cells, if a data sequence demodulated by the weak cell participates in the detection of the maximum ratio combining, the reliability of the maximum ratio combining of the RAKE receiver may be reduced, thereby reducing the communication quality.
In order to solve the above problems, the present disclosure provides a method, an apparatus, a storage medium, and an electronic device for detecting maximal ratio combining, by obtaining energy values of sampling points corresponding to multiple paths in each cell of an active set, determining a target path from the multiple paths according to the energy values of the sampling points, obtaining reception quality of each cell according to the energy values of the sampling points of the target path, screening out a target cell from the cell according to the reception quality, and detecting the maximal ratio combining of a receiver by the target cell, such that by screening the multiple paths in each cell, the reception quality of the cell is evaluated by the screened multiple paths, and the target cell is obtained by filtering the cell according to the reception quality, so that the target cell participates in the detection of the maximal ratio combining, and the reliability of the maximal ratio combining of the receiver (e.g., a RAKE receiver) is improved, and improves the communication quality.
The present disclosure is described in detail below with reference to specific examples.
Fig. 1 is a flowchart illustrating a maximum ratio combining detection method according to an exemplary embodiment of the present disclosure, applied to a receiver (which may include a RAKE receiver), as shown in fig. 1, the method includes:
S101, acquiring energy values of sampling points corresponding to multipath in each cell of the active set.
The active set is a set of cells connected with the user terminal, and the energy value of the sampling point is the energy value corresponding to the multipath in each cell determined by the search window.
And S102, determining a target path from the multipath according to the energy values of the sampling points.
In a land mobile communication system, a user terminal is often in an environment with complex terrain (such as buildings, hills and the like), so that diffraction, diffraction and the like can occur in the signal transmission process between a base station and the user terminal, and multipath effects are caused, so that multipath transmission exists in signals, the multipath can be screened by the method, and a target path can be obtained, and the receiving quality of a cell can be accurately obtained through the target path in subsequent steps.
And S103, acquiring the receiving quality of each cell through the energy value of the sampling point of the target path.
Wherein the reception quality may comprise a signal-to-noise ratio.
S104, screening out a target cell from the cells according to the receiving quality, and detecting the maximum ratio combination of the receiver through the target cell.
By adopting the method, the multipath in each cell is screened, so that the receiving quality of the cell is evaluated through the screened multipath, and the cell is filtered according to the receiving quality to obtain the target cell, so that the target cell participates in the detection of the maximum ratio combining, thereby improving the reliability of the maximum ratio combining of the RAKE receiver and improving the communication quality.
Fig. 2 is a flowchart illustrating a maximum ratio combining detection method according to an exemplary embodiment of the disclosure, applied to a receiver (which may include a RAKE receiver), as shown in fig. 2, the method includes:
s201, determining the window center of a search window of each cell of the active set according to the historical sampling point energy value.
The active set is a set of cells establishing a connection with the ue, and the window length N of the search window is preset, and may be known according to the WCDMA protocol, for example: the search path range of the cell is usually ± 80 chips, so the window length N of the search window may be 160 chips, and of course, the window length of the search window may also be adjusted accordingly according to the data processing capability of the RAKE receiver, but the window length of the search window cannot be set too short to prevent the occurrence of a phenomenon of serious path missing detection during the multipath search.
It should be noted that the window length of the search window corresponding to each cell may be the same, and the search window of each cell takes the historical strongest energy path in the cell as the window center, in a possible implementation manner, historical sample energy values may be obtained, and the historical strongest energy path is determined according to the historical sample energy values, that is, the path corresponding to the maximum historical sample energy value is the historical strongest energy path, where the historical sample energy values may be sample energy values of a previous frame of the RAKE receiver, and the above example is only an example, and the disclosure does not limit this.
S202, determining the offset position of the multipath in each cell relative to the center of the window.
Since there are multiple paths in each cell and the window center of the search window of the cell is the historical strongest energy path, after determining the window center, it is usually possible to detect other next strongest energy paths in the search window from the window center to both ends of the search window, so that the offset position can be the position of the multiple paths in the cell relative to the window center of the search window, respectively.
S203, coherent channel estimation and incoherent channel estimation are carried out through the offset position to obtain a first estimation value and a second estimation value in sequence, and the energy value of the sampling point corresponding to the multipath is obtained according to the first estimation value and the second estimation value.
In this step, in the search window, each path in the multipath is equivalent to one sampling point, so that an energy value of the sampling point of each path in the multipath can be obtained respectively, and a process of specifically obtaining the energy value of the sampling point can refer to the prior art and is not described in detail, so that a target path can be screened out from the multipath through the energy value of the sampling point in subsequent steps.
And S204, screening at least one initial path from the multipath according to the energy values of the sampling points.
In this step, screening at least one initial path from the multi-paths according to the energy values of the sampling points comprises: determining the multipath of which the energy value of the sampling point is greater than or equal to the first screening parameter as the initial path; or, determining a preset number of multipaths as the initial path according to the sequence of the energy values of the sampling points from large to small; or, determining the multipath whose sample point energy value is greater than or equal to the first screening parameter as the initial path to be determined, and determining the preset number of initial paths to be determined as the initial paths according to the sequence of the sample point energy values from large to small, so that the number of the multipath can be limited according to the data processing capacity of the RAKE receiver.
In addition, before determining the multipath with the energy value of the sampling point being greater than or equal to the first screening parameter as the initial path, the method further includes: determining a maximum sampling point energy value from the sampling point energy values, and determining the first filtering parameter according to the maximum sampling point energy value, in a possible implementation manner, sorting the sampling point energy values in a descending order, so as to determine the maximum sampling point energy value according to the sorting result, wherein a path corresponding to the maximum sampling point energy value is a maximum energy path, and exemplarily, the first filtering parameter may be a difference value between the maximum sampling point energy value and M1db, that is, between the maximum sampling point energy value and 10 -M1/10The above method for obtaining the first screening parameter is only an example, and the disclosure does not limit this.
It should be noted that, when the initial path includes one path, the initial path is determined to be the target path; when the initial path includes multiple paths, a path to be determined is determined according to the initial path, and a target path is determined according to the path to be determined, and the subsequent step S205 will specifically describe a process of acquiring the target path when the initial path includes multiple paths.
And S205, determining a target path according to the initial path.
In this step, the target path is determined by:
and S11, acquiring the energy failure area of each initial path.
In a possible implementation manner, the energy failure region of each initial path may be obtained through a failure region obtaining step, where the energy failure region is a region where the energy value of the sampling point of the initial path is in a failure state, and the failure state is a state where the energy value of the sampling point can be ignored when the energy value is in the energy failure region, and the failure region obtaining step includes: acquiring a target initial path with a larger energy value than the sampling point of a current initial path from a plurality of initial paths, determining an energy failure region of the current initial path according to the target initial path, if the current initial path has a plurality of target initial paths, a plurality of energy failure regions correspondingly exist, further, the energy failure region may be set as a region within +/-M2samples of the target initial path, M2 is smaller than 1chip, and the value of M2 may be determined according to a sampling rate, for example, when the sampling rate is 1 time of sampling, the value corresponding to M2 is 0; when the sampling rate is 2 times of sampling, the value corresponding to M2 is 1; when the sampling rate is 4 times of samples, M2 corresponds to a value of 3, it should be noted that the sampling rate is the number of samples of the RAKE receiver in a WCDMA minimum unit time of 1chip (10/38400ms), and the above example is only an example, and the disclosure does not limit this.
And S12, determining whether the initial path is positioned outside the energy failure area.
Performing S13 and S14 when the initial path is outside the energy failure region;
when the initial path is within the energy failure region, S15 is performed.
And S13, determining the initial path as the path to be determined.
And S14, determining a target path according to the path to be determined.
In this step, the target path may be determined from the paths to be determined by:
and S141, acquiring all noise areas of the path to be determined.
Wherein the noise region may be a region outside of +/-M2samples of all the paths to be determined.
And S142, acquiring a noise mean value according to the energy values of the sampling points in the noise area.
Optionally, the energy sum of all sampling point energy values in the noise region and the number of sampling points of the sampling points corresponding to all sampling point energy values in the noise region are obtained, so that the ratio between the energy sum and the number of sampling points is the noise mean.
And S143, acquiring the target path from the path to be determined according to the noise mean value.
The second filtering parameter is determined according to the noise mean value and a first preset parameter, and the target path is obtained from the path to be determined according to the second filtering parameter, the first preset parameter may be determined through algorithm simulation or actual test experience, the second filtering parameter may be a product of the noise mean value and the first preset parameter, for example, the first preset parameter may be 1.5, so that when the energy value of the sampling point of the path to be determined is greater than or equal to the second filtering parameter, the path to be determined is determined to be the target path, and when the energy value of the sampling point of the path to be determined is less than the second filtering parameter, the path to be determined is filtered.
And S15, determining the initial path as an invalid path.
Therefore, the invalid path can be filtered, so that the invalid path does not need to be evaluated in the subsequent step, and the accuracy of the receiving quality of the cell is improved.
And S206, acquiring the receiving quality of each cell through the energy value of the sampling point of the target path.
In this step, the reception quality of each cell is obtained by: acquiring a sum of energy values of all sampling points of the target path, and acquiring a total number of all the target paths, thereby acquiring a reception quality of each cell according to the sum and the total number and the noise mean, where the reception quality may include a signal-to-noise ratio, and specifically, first, a ratio between the sum and the total number may be calculated to obtain an energy mean, and then, determining the reception quality of the cell according to the energy mean and the noise mean, where a calculation formula of the reception quality of the cell may be represented as: SNR is (RSCP-NOISE)/NOISE, where SNR represents reception quality, RSCP represents energy mean, and NOISE represents NOISE mean.
S207, obtains the maximum reception quality from the reception qualities of all the cells.
For example, the receiving qualities of all the cells may be sorted in a descending order, so that the maximum receiving quality may be determined according to the sorting result, and the above example is only an example, and the disclosure does not limit this.
And S208, determining a third screening parameter according to the maximum receiving quality and a second preset parameter.
In this step, the third screening parameter may be a product of the maximum reception quality and a second preset parameter, and the second preset parameter may also be determined through algorithm simulation or actual test experience, for example, the second preset parameter may be 0.25, so that all cells are screened through the third screening parameter in the subsequent step.
S209, screening the target cell from the cell according to the third screening parameter.
Determining whether the receiving quality of the cell is greater than or equal to the third screening parameter, and determining the cell as a target cell when the receiving quality of the cell is greater than or equal to the third screening parameter; and filtering the cell when the receiving quality of the cell is less than the third screening parameter.
S210, detecting the maximum ratio combining of the receivers through the target cell.
The obtained target path of the target cell is used as a receiving path of a service channel (such as a DPDCH, an AGCH, an SCCPCH, a DPCCH, an RGCH, an HICH, and the like), each receiving path has related service channel data, and maximum ratio combining can be performed on the service channel data between different cells and then obtained after demodulation.
By adopting the method, the multipath in each cell is screened, so that the reception quality of the cell is evaluated through the screened multipath, and the cell is filtered according to the reception quality to obtain the target cell, so that the target cell participates in the detection of the maximum ratio combining, thereby improving the reliability of the maximum ratio combining of the RAKE receiver and improving the communication quality.
Fig. 3 is a block diagram of a maximum ratio combining detection apparatus according to an exemplary embodiment of the present disclosure, which is applied to a receiver, and is shown in fig. 3, including:
a first obtaining module 301, configured to obtain energy values of sampling points corresponding to multipaths in each cell of an active set;
a determining module 302, configured to determine a target path from the multipath according to the energy values of the sampling points;
a second obtaining module 303, configured to obtain the reception quality of each cell according to the energy value of the sampling point of the target path;
A processing module 304, configured to screen out a target cell from the cells according to the reception quality, and perform detection of maximum ratio combining of the receiver through the target cell.
Fig. 4 is a block diagram of a maximum ratio combining detection apparatus according to an exemplary embodiment of the disclosure, and as shown in fig. 4, the first obtaining module 301 includes:
a first determining submodule 3011, configured to determine, according to energy values of historical sampling points, a window center of a search window of each cell of the active set;
a second determining submodule 3012, configured to determine an offset position of the multipath in each of the cells with respect to the center of the window;
the first obtaining sub-module 3013 is configured to perform coherent channel estimation and non-coherent channel estimation through the offset position to sequentially obtain a first estimation value and a second estimation value, and obtain an energy value of a sampling point corresponding to the multipath according to the first estimation value and the second estimation value.
Fig. 5 is a block diagram of a maximum ratio combining detection apparatus according to an exemplary embodiment of the disclosure, and as shown in fig. 5, the determining module 302 includes:
a first filtering sub-module 3021, configured to filter at least one initial path from the multiple paths according to the energy values of the sampling points;
A third determining submodule 3022 is configured to determine the target path according to the initial path.
Optionally, the first filtering sub-module 3021 is configured to determine, as the initial path, a multipath having an energy value of the sampling point greater than or equal to a first filtering parameter; or the like, or a combination thereof,
determining a preset number of multipaths as the initial path according to the sequence of the energy values of the sampling points from large to small; or the like, or a combination thereof,
and determining the multipath of which the energy value of the sampling point is greater than or equal to the first screening parameter as an initial path to be determined, and determining the preset number of initial paths to be determined as the initial paths according to the sequence of the energy values of the sampling points from large to small.
Fig. 6 is a block diagram of a maximum ratio combining detection apparatus according to an exemplary embodiment of the disclosure, and as shown in fig. 6, the determining module 302 further includes:
a fourth determining sub-module 3023 for determining a maximum sample point energy value from the sample point energy values;
a fifth determining sub-module 3024, configured to determine the first filtering parameter according to the maximum sampling point energy value.
Optionally, when the initial path includes multiple paths, the third determining submodule 3022 is configured to obtain an energy failure region of each of the initial paths; the energy failure area is an area where the energy value of the sampling point of the initial path is in a failure state;
Determining whether the initial path is outside the energy failure region;
when the initial path is positioned outside the energy failure area, determining the initial path as a path to be determined;
and determining the target path according to the path to be determined.
Optionally, the third determining submodule 3022 is configured to obtain an energy failure region of each initial path through a failure region obtaining step;
the failure region acquisition step includes:
acquiring a plurality of target initial paths with energy values larger than the energy values of sampling points of the current initial path from the plurality of initial paths;
and determining the energy failure area of the current initial path according to the target initial path.
Optionally, the third determining submodule 3022 is configured to obtain noise regions of all the paths to be determined;
acquiring a noise mean value according to the energy value of the sampling point in the noise area;
and acquiring the target path from the path to be determined according to the noise mean value.
Optionally, the third determining sub-module 3022 is configured to determine a second filtering parameter according to the noise mean and a first preset parameter;
and acquiring the target path from the path to be determined according to the second screening parameter.
Fig. 7 is a block diagram of a maximum ratio combining detection apparatus according to an exemplary embodiment of the disclosure, and as shown in fig. 7, the second obtaining module 303 includes:
A second obtaining sub-module 3031, configured to obtain a sum of energy values of sampling points of all the target paths;
a third obtaining submodule 3032, configured to obtain the total number of all the target paths;
a fourth obtaining submodule 3033, configured to obtain the reception quality of each cell according to the sum, the total number and the noise mean.
Fig. 8 is a block diagram of a maximum ratio combining detection apparatus according to an exemplary embodiment of the disclosure, and as shown in fig. 8, the processing module 304 includes:
a fifth obtaining submodule 3041 for obtaining the maximum reception quality from the reception qualities of all the cells;
a sixth determining submodule 3042, configured to determine a third filtering parameter according to the maximum receiving quality and the second preset parameter;
a second filtering submodule 3043, configured to filter the target cell from the cells according to the third filtering parameter.
By adopting the device, the multipath in each cell is screened, so that the receiving quality of the cell is evaluated through the screened multipath, and the cell is filtered according to the receiving quality to obtain the target cell, so that the target cell participates in the detection of the maximum ratio combining, thereby improving the reliability of the maximum ratio combining of the RAKE receiver and improving the communication quality.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 9 is a block diagram illustrating an electronic device 900 in accordance with an example embodiment. As shown in fig. 9, the electronic device 900 may include: a processor 901 and a memory 902. The electronic device 900 may also include one or more of a multimedia component 903, an input/output (I/O) interface 904, and a communications component 905.
The processor 901 is configured to control the overall operation of the electronic device 900 to complete all or part of the steps in the above-mentioned maximum ratio combining detection method. The memory 902 is used to store various types of data to support operation of the electronic device 900, such as instructions for any application or method operating on the electronic device 900 and application-related data. The Memory 902 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk or optical disk. The multimedia component 903 may include a screen and an audio component. Wherein the screen may be, for example, a touch screen and the audio component is used for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving an external audio signal. The received audio signal may further be stored in the memory 902 or transmitted through the communication component 905. The audio assembly also includes at least one speaker for outputting audio signals. The I/O interface 904 provides an interface between the processor 901 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 905 is used for wired or wireless communication between the electronic device 900 and other devices. Wireless Communication, such as Wi-Fi, bluetooth, Near Field Communication (NFC), 2G, 3G, or 4G, or a combination of one or more of them, so that the corresponding Communication component 905 may include: Wi-Fi module, bluetooth module, NFC module.
In an exemplary embodiment, the electronic Device 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described maximum ratio combining detection method.
In another exemplary embodiment, a computer readable storage medium including program instructions which, when executed by a processor, implement the steps of the maximum ratio combining detection method described above is also provided.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (22)
1. A method for maximum ratio combining detection, applied to a receiver, comprising:
acquiring sampling point energy values corresponding to multipath in each cell of an active set;
determining a target path from the multi-paths according to the energy values of the sampling points;
acquiring the receiving quality of each cell through the energy value of the sampling point of the target path;
screening out a target cell from the cells according to the receiving quality, and detecting the maximum ratio combination of a receiver through the target cell;
the acquiring of the energy value of the sampling point corresponding to the multipath in each cell of the active set includes:
determining the window center of a search window of each cell of the active set according to the energy value of a historical sampling point;
Determining an offset position of the multipath in each of the cells relative to the center of the window;
and carrying out coherent channel estimation and incoherent channel estimation through the offset position to sequentially obtain a first estimation value and a second estimation value, and acquiring the energy value of the sampling point corresponding to the multipath according to the first estimation value and the second estimation value.
2. The method of claim 1, wherein determining a target path from the multipaths based on the sample point energy values comprises:
screening at least one initial path from the multipath according to the energy values of the sampling points;
and determining the target path according to the initial path.
3. The method of claim 2, wherein the screening at least one initial path from the multipaths based on the sample point energy values comprises:
determining the multipath of which the energy value of the sampling point is greater than or equal to a first screening parameter as the initial path; or the like, or, alternatively,
determining a preset number of multipaths as the initial paths according to the sequence of the energy values of the sampling points from large to small; or the like, or, alternatively,
and determining the multipath of which the energy value of the sampling point is greater than or equal to the first screening parameter as an initial path to be determined, and determining the preset number of initial paths to be determined as the initial paths according to the sequence of the energy values of the sampling points from large to small.
4. The method according to claim 3, wherein before said determining that the multipath having the sample point energy value greater than or equal to the first filtering parameter is the initial path, further comprising:
determining a maximum sample point energy value from the sample point energy values;
and determining the first screening parameter according to the maximum sampling point energy value.
5. The method according to any one of claims 2-4, wherein when the initial path comprises a plurality of paths, the determining the target path from the initial path comprises:
acquiring an energy failure area of each initial path; the energy failure area is an area where the energy value of the sampling point of the initial path is in a failure state;
determining whether the initial path is outside the energy failure region;
when the initial path is located outside the energy failure area, determining the initial path as a path to be determined;
and determining the target path according to the path to be determined.
6. The method of claim 5, wherein said obtaining an energy failure region for each of said initial paths comprises: acquiring an energy failure area of each initial path through a failure area acquisition step;
The failure region acquisition step includes:
acquiring a target initial path with energy value larger than the energy value of a sampling point of the current initial path from the plurality of initial paths;
and determining an energy failure area of the current initial path according to the target initial path.
7. The method of claim 6, wherein the determining the target path according to the path to be determined comprises:
acquiring noise areas of all the paths to be determined;
acquiring a noise mean value according to the energy values of the sampling points in the noise area;
and acquiring the target path from the path to be determined according to the noise mean value.
8. The method of claim 7, wherein the obtaining the target path from the path to be determined according to the noise mean comprises:
determining a second screening parameter according to the noise mean value and a first preset parameter;
and acquiring the target path from the path to be determined according to the second screening parameter.
9. The method according to claim 7 or 8, wherein the obtaining the reception quality of each cell through the energy values of the sampling points of the target path comprises:
acquiring the sum of the energy values of the sampling points of all the target paths;
Acquiring the total number of all the target paths;
and acquiring the receiving quality of each cell according to the sum value, the total number and the noise mean value.
10. The method of claim 1, wherein the screening the cells for a target cell based on the reception quality comprises:
obtaining a maximum reception quality from the reception qualities of all the cells;
determining a third screening parameter according to the maximum receiving quality and a second preset parameter;
and screening the target cell from the cells according to the third screening parameter.
11. A maximum ratio combining detection apparatus, applied to a receiver, comprising:
the first acquisition module is used for acquiring the energy value of a sampling point corresponding to multipath in each cell of the active set;
the determining module is used for determining a target path from the multipath according to the energy values of the sampling points;
the second acquisition module is used for acquiring the receiving quality of each cell through the energy value of the sampling point of the target path;
a processing module, configured to screen a target cell from the cells according to the reception quality, and detect maximum ratio combining of a receiver through the target cell;
The first acquisition module comprises:
the first determining submodule is used for determining the window center of a search window of each cell of the active set according to the energy value of a historical sampling point;
a second determining submodule, configured to determine offset positions of the multipaths in each of the cells with respect to the center of the window;
and the first obtaining submodule is used for carrying out coherent channel estimation and incoherent channel estimation through the offset position to sequentially obtain a first estimation value and a second estimation value, and obtaining the energy value of the sampling point corresponding to the multipath according to the first estimation value and the second estimation value.
12. The apparatus of claim 11, wherein the determining means comprises:
the first screening submodule is used for screening at least one initial path from the multipath according to the energy value of the sampling point;
and the third determining submodule is used for determining the target path according to the initial path.
13. The apparatus of claim 12 wherein the first filtering sub-module is configured to determine multipath having the energy value of the sampling point greater than or equal to a first filtering parameter as the initial path; or the like, or, alternatively,
determining a preset number of multipaths as the initial paths according to the sequence of the energy values of the sampling points from large to small; or the like, or, alternatively,
And determining the multipath with the sampling point energy value larger than or equal to the first screening parameter as the initial path to be determined, and determining the initial paths to be determined in the preset number as the initial paths according to the sequence of the sampling point energy values from large to small.
14. The apparatus of claim 13, wherein the determining module further comprises:
a fourth determining sub-module for determining a maximum sampling point energy value from the sampling point energy values;
and the fifth determining submodule is used for determining the first screening parameter according to the maximum sampling point energy value.
15. The apparatus according to any one of claims 12-14, wherein when the initial path includes a plurality of paths, the third determining submodule is configured to obtain an energy failure region of each of the initial paths; the energy failure area is an area where the energy value of the sampling point of the initial path is in a failure state;
determining whether the initial path is outside the energy failure region;
when the initial path is located outside the energy failure area, determining the initial path as a path to be determined;
and determining the target path according to the path to be determined.
16. The apparatus according to claim 15, wherein the third determining submodule is configured to obtain an energy failure region of each of the initial paths through a failure region obtaining step;
the failure region acquisition step includes:
acquiring a target initial path with energy value larger than the energy value of a sampling point of the current initial path from the plurality of initial paths;
and determining an energy failure area of the current initial path according to the target initial path.
17. The apparatus according to claim 16, wherein the third determining submodule is configured to obtain noise regions of all the paths to be determined;
acquiring a noise mean value according to the energy values of the sampling points in the noise area;
and acquiring the target path from the path to be determined according to the noise mean value.
18. The apparatus of claim 17, wherein the third determining sub-module is configured to determine a second filtering parameter according to the noise mean and a first preset parameter;
and acquiring the target path from the path to be determined according to the second screening parameter.
19. The apparatus of claim 17 or 18, wherein the second obtaining module comprises:
The second acquisition sub-module is used for acquiring the sum of the energy values of the sampling points of all the target paths;
a third obtaining submodule, configured to obtain the total number of all the target paths;
and the fourth acquisition submodule is used for acquiring the receiving quality of each cell according to the sum value, the total number and the noise mean value.
20. The apparatus of claim 11, wherein the processing module comprises:
a fifth obtaining sub-module, configured to obtain a maximum reception quality from the reception qualities of all the cells;
a sixth determining submodule, configured to determine a third filtering parameter according to the maximum receiving quality and a second preset parameter;
and the second screening submodule is used for screening the target cell from the cells according to the third screening parameter.
21. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 10.
22. An electronic device, comprising:
a memory having a computer program stored thereon; and
one or more processors configured to execute the programs in the memory to implement the method of any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205836.3A CN110278018B (en) | 2018-03-13 | 2018-03-13 | Maximum ratio combining detection method and device, storage medium and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810205836.3A CN110278018B (en) | 2018-03-13 | 2018-03-13 | Maximum ratio combining detection method and device, storage medium and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110278018A CN110278018A (en) | 2019-09-24 |
| CN110278018B true CN110278018B (en) | 2022-06-10 |
Family
ID=67958593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810205836.3A Active CN110278018B (en) | 2018-03-13 | 2018-03-13 | Maximum ratio combining detection method and device, storage medium and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110278018B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101390319A (en) * | 2006-06-29 | 2009-03-18 | 中兴通讯股份有限公司 | A demodulation method for downlink received signal in CDMA |
| CN106231643A (en) * | 2016-07-14 | 2016-12-14 | 华为技术有限公司 | A kind of signal combining method and wireless terminal |
| CN106559102A (en) * | 2015-09-30 | 2017-04-05 | 上海摩波彼克半导体有限公司 | A kind of multipath signal merging treatment method and system and mobile terminal |
| CN107733464A (en) * | 2017-11-01 | 2018-02-23 | 中山大学花都产业科技研究院 | A kind of associated detecting method and system of Chirp spread spectrum communication systems |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7058399B2 (en) * | 2001-07-11 | 2006-06-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Search window delay tracking in code division multiple access communication systems |
| US7894507B2 (en) * | 2004-10-06 | 2011-02-22 | Broadcom Corporation | Method and system for HSDPA maximum ratio combination (MRC) and equalization switching |
-
2018
- 2018-03-13 CN CN201810205836.3A patent/CN110278018B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101390319A (en) * | 2006-06-29 | 2009-03-18 | 中兴通讯股份有限公司 | A demodulation method for downlink received signal in CDMA |
| CN106559102A (en) * | 2015-09-30 | 2017-04-05 | 上海摩波彼克半导体有限公司 | A kind of multipath signal merging treatment method and system and mobile terminal |
| CN106231643A (en) * | 2016-07-14 | 2016-12-14 | 华为技术有限公司 | A kind of signal combining method and wireless terminal |
| CN107733464A (en) * | 2017-11-01 | 2018-02-23 | 中山大学花都产业科技研究院 | A kind of associated detecting method and system of Chirp spread spectrum communication systems |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110278018A (en) | 2019-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101059053B1 (en) | Systems, Methods, and Apparatus for Setting Finger Lock Status | |
| EP2436212B1 (en) | Movement sensor uses in communication systems | |
| US9706458B2 (en) | Method of interference cancellation and method of detection of erroneous neighbour cell measurements | |
| US9264123B2 (en) | Antenna activity detection in multi-antenna communication | |
| JP5868901B2 (en) | Method and apparatus for performing a search using multiple receive diversity (RXD) search modes | |
| JP2001524790A (en) | Method and system for determining position of mobile radio terminal | |
| KR100453423B1 (en) | Radio base station apparatus and radio communication method | |
| US20070287510A1 (en) | Efficient radio environment condition recognition | |
| CN102694573B (en) | Detecting and eliminating potential performance degradation caused by neighboring identical scrambling codes | |
| JP2001024551A (en) | Communication terminal equipment and radio receiving method | |
| CN110278018B (en) | Maximum ratio combining detection method and device, storage medium and electronic equipment | |
| US7724808B2 (en) | Efficient delay profile computation with receive diversity | |
| JP4165238B2 (en) | Path search circuit, method and program | |
| EP2326027B1 (en) | Multi-path searching apparatus and method supporting transmission diversity mode detection | |
| JP4877197B2 (en) | Radio diversity receiving apparatus and receiving method | |
| KR20090018975A (en) | Apparatus and method for interference cancellation | |
| US20080151969A1 (en) | Efficient Delay Profile Computation with Receive Diversity | |
| US9264098B2 (en) | Process for finger insertion and removal in a rake receiver and receiver for carrying out the process | |
| US9654171B2 (en) | Apparatus and method for jointly selecting the tap values and delays of the fingers for a rake receiver of two carriers | |
| JP2006135966A (en) | Method for calculating path profile in cellular communication system | |
| JP2004007177A (en) | Method and apparatus for searching reception path timing in cdma communication system |
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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100085 unit C, building C, lin66, Zhufang Road, Qinghe, Haidian District, Beijing Applicant after: Beijing Xiaomi pinecone Electronic Co., Ltd Address before: 100085 Beijing city Haidian District Qinghe Shun Yip things Park Building 3 unit A Applicant before: BEIJING PINECONE ELECTRONICS Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |