CN103002460B - A kind of signal combining method - Google Patents
A kind of signal combining method Download PDFInfo
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- CN103002460B CN103002460B CN201110275146.3A CN201110275146A CN103002460B CN 103002460 B CN103002460 B CN 103002460B CN 201110275146 A CN201110275146 A CN 201110275146A CN 103002460 B CN103002460 B CN 103002460B
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Abstract
The invention discloses signal combining method, by introducing threshold mechanism, the merging arranging a received signal quality evaluation and test parameter participates in thresholding, when the quality of the actual restituted signal received participates in thresholding higher than this merging, just allow the merging of this restituted signal, thus only noisy antenna demodulation result can be avoided to merge, improve systematic function.
Description
Technical field
The present invention relates to the signal processing technology in mobile communication system, particularly relate to multiple antennas and cover lower signal combining method.
Background technology
In real network planning/optimization, may there is some region cannot solve covering problem by conventional network planning/network optimization means.Multiple coverage areas scheme can well address this problem.In the scheme of multiple coverage areas, eachly littlely divide into two or more area of coverage, each area of coverage has 1 or 1 group of antenna, and different aerial arrays covers different regions; Certainly in order to the continuity of ensuring coverage, certain overlapping area is also had jointly to be covered by two or more sets antennas.So for certain user be in community, its upward signal may only be received by wherein one group of antenna, also may be received by two or more sets antennas simultaneously.
In the scheme of multiple coverage areas, for the reception process of upward signal, having a kind of is at present the method for the Received signal strength of many group antennas being carried out to maximum-ratio combing, in the method, the Received signal strength of each group of antenna is all merged.Like this, under group antenna covers jointly more than being in user, the merging gain from different antennae signal can be obtained, promote uplink receiving performance.
In actual applications, if under user is only in the covering of wherein one group of antenna of many group antennas, adopt the method for many group aerial signal maximum-ratio combing, can other do not have Received signal strength only noisy antenna demodulation result merge to come in, reduce the signal to noise ratio of final combined signal, can performance loss be caused.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of signal combining method, and the method can avoid only noisy antenna demodulation result to merge, and improves systematic function.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A kind of signal combining method, the method comprises the following steps:
A, at present sub-frame, for each antenna sets, obtain its restituted signal received signal quality evaluation and test parameter value;
B, for each described antenna sets, if described received signal quality evaluation and test parameter value is greater than default merging and participates in thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame;
C, the restituted signal that the signal of determined participation present sub-frame merges to be merged.
A kind of signal combining method, the method comprises the following steps:
A, at present sub-frame, for each antenna sets, obtain its restituted signal received signal quality evaluation and test parameter value;
B, for each described antenna sets, when this antenna sets does not participate in signal merging at the restituted signal of a upper subframe, if the described received signal quality evaluation and test parameter value of present frame is greater than default merging and participates in thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame;
When this antenna sets participates in signal merging at the restituted signal of a upper subframe, if the described received signal quality evaluation and test parameter value of present frame is greater than default merging and exits thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame; Described merging is exited thresholding and is less than described merging participation thresholding;
C, the restituted signal that the signal of determined participation present sub-frame merges to be merged.
In sum, the signal combining method that the present invention proposes, by introducing threshold mechanism, the merging arranging a received signal quality evaluation and test parameter participates in thresholding, when the quality of the actual restituted signal received participates in thresholding higher than this merging, just allow the merging of this restituted signal, thus only noisy antenna demodulation result can be avoided to merge, improve systematic function.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one;
Fig. 2 is the schematic flow sheet of the embodiment of the present invention two.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: introduce threshold mechanism, by current received signal quality evaluation and test parameter value compared with this thresholding, judge whether the merging participating in signal, like this, only noisy antenna demodulation result can be avoided to merge, improve systematic function.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one, and as shown in Figure 1, the method comprises;
Step 101, at present sub-frame, for each antenna sets, obtain its restituted signal received signal quality evaluation and test parameter value.
Particularly, described received signal quality evaluation and test parameter can be amplitude and noise ratio ANR or signal to noise ratio snr or carrier interference ratio C/I.Specifically how to obtain described received signal quality evaluation and test parameter value, existing method can be adopted to realize, do not repeat them here.
Step 102, for each described antenna sets, if described received signal quality evaluation and test parameter value is greater than default merging and participates in thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame.
Step 103, the restituted signal that the signal of determined participation present sub-frame merges to be merged.
Here, specifically how determined signal is merged, by those skilled in the art are grasped, do not repeat them here.
Further, consider if judge whether antenna sets signal participates in merging, only adopt a thresholding, so under the obvious sight of channel fading, its amplitude and noise ratio of signal in certain antenna sets may fluctuate up and down back and forth at this thresholding, so this antenna sets signal will time and participate in merge time and do not participate in merge.In order to avoid in these cases, the fluctuation of merging, improves the convergence of power control, further improving performance, can also introduce another one and merge and exit thresholding.Be described below by the specific implementation of embodiments of the invention two to this thought.
Fig. 2 is the schematic flow sheet of the embodiment of the present invention two, and as shown in Figure 2, the method comprises the following steps:
Step 201, at present sub-frame, for each antenna sets, obtain its restituted signal received signal quality evaluation and test parameter value.
This step is identical with step 101, does not repeat them here.
Particularly, described received signal quality evaluation and test parameter can be amplitude and noise ratio ANR or signal to noise ratio snr or carrier interference ratio C/I.
Step 202, for each described antenna sets, when this antenna sets does not participate in signal merging at the restituted signal of a upper subframe, if the described received signal quality evaluation and test parameter value of present frame is greater than default merging and participates in thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame;
When this antenna sets participates in signal merging at the restituted signal of a upper subframe, if the described received signal quality evaluation and test parameter value of present frame is greater than default merging and exits thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame; Described merging is exited thresholding and is less than described merging participation thresholding.
Here, by arrange merging exit thresholding be less than described merging participate in thresholding, make antenna sets after the restituted signal of a upper subframe participates in signal merging, merging can not be exited easily in next subframe, thus the fluctuation of the power control caused by fluctuation merged under effectively can avoiding the obvious sight of channel fading.
Step 203, the restituted signal that the signal of determined participation present sub-frame merges to be merged.
This step, with step 103, does not repeat them here.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a signal combining method, is characterized in that, the method comprises the following steps:
A, at present sub-frame, for each antenna sets, obtain its restituted signal received signal quality evaluation and test parameter value;
B, for each described antenna sets, when this antenna sets does not participate in signal merging at the restituted signal of a upper subframe, if the described received signal quality evaluation and test parameter value of present frame is greater than default merging and participates in thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame;
When this antenna sets participates in signal merging at the restituted signal of a upper subframe, if the described received signal quality evaluation and test parameter value of present frame is greater than default merging and exits thresholding, then determine that the restituted signal of this antenna sets participates in the signal merging of present sub-frame, otherwise, determine that the restituted signal of this antenna sets does not participate in the signal merging of present sub-frame; Described merging is exited thresholding and is less than described merging participation thresholding;
C, the restituted signal that the signal of determined participation present sub-frame merges to be merged.
2. method according to claim 1, is characterized in that, described received signal quality evaluation and test parameter is amplitude and noise ratio ANR or signal to noise ratio snr or carrier interference ratio C/I.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110275146.3A CN103002460B (en) | 2011-09-16 | 2011-09-16 | A kind of signal combining method |
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| CN201110275146.3A CN103002460B (en) | 2011-09-16 | 2011-09-16 | A kind of signal combining method |
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| CN103002460A CN103002460A (en) | 2013-03-27 |
| CN103002460B true CN103002460B (en) | 2015-09-02 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1681224A (en) * | 2004-04-07 | 2005-10-12 | 华为技术有限公司 | Up-link signal receiving and processing method of CDMA |
| CN101902260A (en) * | 2010-07-27 | 2010-12-01 | 华为技术有限公司 | Cooperative antenna selection method and device and base station thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1681224A (en) * | 2004-04-07 | 2005-10-12 | 华为技术有限公司 | Up-link signal receiving and processing method of CDMA |
| CN101902260A (en) * | 2010-07-27 | 2010-12-01 | 华为技术有限公司 | Cooperative antenna selection method and device and base station thereof |
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| CN103002460A (en) | 2013-03-27 |
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Granted publication date: 20150902 Termination date: 20210916 |