CN110365350B - Method and device for enhancing adaptability of receiving channel orthogonal correction algorithm - Google Patents
Method and device for enhancing adaptability of receiving channel orthogonal correction algorithm Download PDFInfo
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- CN110365350B CN110365350B CN201910550631.3A CN201910550631A CN110365350B CN 110365350 B CN110365350 B CN 110365350B CN 201910550631 A CN201910550631 A CN 201910550631A CN 110365350 B CN110365350 B CN 110365350B
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Abstract
The invention discloses a method and a device for enhancing the adaptability of a receiving channel orthogonal correction algorithm, and relates to the field of communication. The receiving channel orthogonal correction algorithm adaptability enhancement technology is applied to a wireless communication receiving module and used for improving the adaptability of a receiving channel orthogonal correction algorithm. The receiving channel orthogonal correction algorithm adaptability enhancing technology comprises the following steps: segmenting the frequency of a receiving channel to obtain a plurality of frequency segments; determining a corresponding target frequency segment according to a predefined local oscillation frequency; and selecting a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the received digital intermediate frequency signal so as to enable the amplitude deviation and the phase deviation of the digital intermediate frequency signal to be within a preset range. The adaptability enhancing technology and the device for the receiving channel orthogonal correction algorithm can reduce the orthogonal error range of the digital intermediate frequency signals of the receiving channel, thereby reducing the difficulty of the orthogonal correction algorithm, improving the convergence of the orthogonal correction algorithm and consuming less hardware resources.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for enhancing the adaptability of a receive channel orthogonal correction algorithm.
Background
In a wireless communication receiving module, the orthogonality of a receiving channel is generally improved by an orthogonal correction algorithm, which may be implemented by blind correction (tracking) or training signal (tracking).
The blind correction technique performs statistical analysis on the quadrature characteristic of the received digital intermediate frequency signal to obtain the quadrature error characteristic of the channel for compensation, and the training signal performs compensation by applying a signal to test the quadrature performance of the channel, both of which are usually implemented by a digital filter. In the orthogonal correction technology, in order to increase the range of the orthogonal error that can be compensated by the orthogonal correction algorithm, the order of the compensation filter is usually increased, which greatly increases the difficulty and the actual convergence of the algorithm, or even cannot be realized.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for enhancing the adaptability of the receiving channel orthogonal correction algorithm to improve the above problem.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for enhancing an adaptability of a receive channel orthogonal correction algorithm, which is applied to a wireless communication receive module, and the method includes:
segmenting the frequency of a receiving channel to obtain a plurality of frequency segments;
determining a corresponding target frequency segment according to a predefined local oscillation frequency;
and selecting a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the received digital intermediate frequency signal so as to enable the amplitude deviation and the phase deviation of the digital intermediate frequency signal to be within a preset range.
The method for adaptively enhancing the receiving channel orthogonal correction algorithm as described above, optionally, the method further includes:
and carrying out quadrature correction on the receiving channel.
Optionally, the method for enhancing the adaptability of the receiving channel orthogonal correction algorithm, where segmenting the frequency of the receiving channel includes:
the frequency of the receive channel is segmented according to fixed frequency segments.
Optionally, the method for enhancing the adaptability of the receiving channel orthogonal correction algorithm, where segmenting the frequency of the receiving channel includes:
and segmenting the frequency of the receiving channel according to the similarity of the frequency characteristics.
In a second aspect, an embodiment of the present invention provides an apparatus for enhancing adaptability of a receiving channel orthogonal correction algorithm, which is applied to a wireless communication receiving module, where the apparatus for enhancing adaptability of a receiving channel orthogonal correction algorithm includes:
the segmentation module is used for segmenting the frequency of the receiving channel to obtain a plurality of frequency segments;
the determining module is used for determining a corresponding target frequency segment according to a predefined local oscillation frequency;
and the adjusting module is used for selecting a preset number corresponding to the target frequency segment to carry out amplitude and phase adjustment on the received digital intermediate frequency signal so as to enable the amplitude deviation and the phase deviation of the digital intermediate frequency signal to be within a preset range.
As described above, the apparatus for adaptively enhancing a receive channel orthogonal correction algorithm optionally further includes:
and the correction module is used for carrying out orthogonal correction on the receiving channel.
Optionally, the segmentation module is configured to segment the frequency of the receiving channel according to a fixed frequency segment.
Optionally, the segmentation module is configured to segment the frequency of the receiving channel according to similarity of frequency characteristics.
Compared with the prior art, the invention has the beneficial effects that:
the method and the device for enhancing the adaptability of the receiving channel orthogonal correction algorithm can reduce the orthogonal error range of the receiving channel, thereby reducing the difficulty of the orthogonal correction algorithm, consuming less hardware resources, hardly increasing the power consumption and simultaneously improving the convergence of the orthogonal correction algorithm.
Drawings
Fig. 1 is a flowchart illustrating a method for adaptively enhancing an orthogonal correction algorithm of a receiving channel according to a preferred embodiment of the present invention.
Fig. 2 is a block diagram of an apparatus for adaptively enhancing an orthogonal correction algorithm of a receiving channel according to a preferred embodiment of the present invention.
Description of reference numerals: 100-a receiving channel orthogonal correction algorithm adaptability enhancing device; 110-a segmentation module; 120-a determination module; 130-a regulation module; 140-correction module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, an embodiment of the invention provides a method for adaptively enhancing an orthogonal correction algorithm of a receiving channel, which is applied to a wireless communication receiving module. The method described in fig. 1 will be explained in detail below.
Step S101, segmenting the frequency of the receiving channel.
The method for enhancing the adaptability of the receiving channel orthogonal correction algorithm provided by the embodiment of the invention can be applied to a wireless communication receiving module, and the wireless communication receiving module can be, but is not limited to a WiFi communication module, a ZigBee communication module and the like.
The method provided by the embodiment of the invention can adjust the orthogonality of the received digital intermediate frequency signal. Before adjusting the orthogonality of the received digital intermediate frequency signals, the wireless communication receiving module firstly segments the frequency of a receiving channel to obtain a plurality of frequency segments. The frequency of the receiving channel can be segmented according to the fixed frequency segment during segmentation, for example, the frequency of the receiving channel is 100MHZ-400MHZ, and one frequency segment can be divided every 100MHZ interval during segmentation, that is, the frequency of the receiving channel can be divided into three frequency segments of 100MHZ-200MHZ, 200MHZ-300MHZ, and 300MHZ-400 MHZ. For another example, the frequencies of the receiving channels may be segmented according to the similarity of the frequency characteristics, and if the signals in a certain frequency interval range have the same or similar characteristics, the frequency interval range may be divided into a segment.
It will be appreciated that in other embodiments, the frequency bins of the receive channel may be pre-divided by the user.
And step S102, determining a corresponding target frequency segment according to a predefined local oscillation frequency.
The wireless communication receiving module is predefined with a corresponding local oscillator frequency, which is related to the type of the signal received by the wireless communication receiving module, for example, the WCDMA communication module and the GSM communication module have different local oscillator frequencies corresponding to each other.
When the quadrature performance of the digital intermediate frequency signal is adjusted, the wireless communication receiving module determines the local oscillation frequency according to the type of the received signal, and determines a corresponding frequency segment, namely a target frequency segment, from the plurality of frequency segments according to the local oscillation frequency.
Step S103, selecting a preset number corresponding to the target frequency segment to carry out amplitude and phase adjustment on the received digital intermediate frequency signal.
Each frequency bin is predefined with a corresponding preset number for amplitude and phase adjustment of the digital intermediate frequency signal. After the target frequency segment is determined, the wireless communication receiving module selects a preset number corresponding to the target frequency segment according to the target frequency segment and adjusts the amplitude and the phase of the received digital intermediate frequency signal, so that the amplitude deviation and the phase deviation of the digital intermediate frequency signal are within a preset range.
The quality of the output signal of the receiving channel is closely related to the orthogonality of the receiving channel, and for the wireless communication receiving module, the orthogonality of the receiving channel generally needs to be improved by an orthogonality correction algorithm, the complexity of the algorithm is sharply increased along with the increase of the orthogonality error when the correction is carried out, and meanwhile, the convergence of the algorithm is also reduced. When the deviation of the orthogonal performance of the general receiving channel is less than or equal to 5dB in amplitude deviation and less than or equal to 10 degrees in phase deviation, the complexity of an orthogonal correction algorithm is relatively low and the convergence is relatively high. Therefore, in the embodiment of the present invention, the value of the preset range is that the amplitude range of the radio frequency signal is within 5dB, and the phase deviation of the radio frequency signal is within 10 °.
In the embodiment of the present invention, a calculation formula for adjusting the amplitude and the phase of the received digital intermediate frequency signal is as follows:
I＝dinI*cos(EΦ_value)*Eg_value+dinQ*sin(EΦ_value)*Eg_value
Q＝dinQ
wherein I and Q are compensated digital intermediate frequency signals dinIAnd dinQI and Q signals, cos (E), being the original digital intermediate frequency signalΦ_value) And sin (E)Φ_value) For a preset number corresponding to the phase, Eg_valueThe configuration number corresponding to the amplitude.
Step S104, the receiving channel is subjected to orthogonal correction.
After the amplitude and phase adjustment of the digital intermediate frequency signal is carried out, the amplitude deviation of the digital intermediate frequency signal is kept within 5dB, and the phase deviation of the digital intermediate frequency signal is kept within 10 degrees. At this time, the wireless communication receiving module performs quadrature correction on the receiving channel, thereby improving the quality of the output signal.
The process of the orthogonal correction is as follows:
the orthogonal correction is realized by applying a training signal to a radio frequency receiving end, detecting the orthogonal error of a receiving channel in a digital domain, or directly detecting the orthogonal error of the receiving channel in the digital domain in a statistical mode (the training signal is not needed), and then adjusting the coefficient of a programmable digital filter in the receiving channel.
In summary, the method for enhancing the adaptability of the receiving channel orthogonal correction algorithm provided in the embodiment of the present invention may be implemented before the orthogonal correction, by segmenting the orthogonal error of the receiving channel according to frequency, and performing amplitude and phase adjustment on the digital intermediate frequency signal according to the predefined preset number, so that the orthogonal error of the receiving channel is reduced to a certain range, and then performing the correction through the orthogonal correction algorithm. Therefore, the orthogonal error of the channel is reduced, the complexity of the orthogonal correction algorithm is reduced, the convergence of the algorithm is improved, and the channel frequency segmentation method is particularly suitable for the condition that the working frequency is wide. And secondly, because the orthogonal error of the channel is reduced, the consumed hardware resource is less, the difficulty of the algorithm is not increased, and the power consumption of the wireless communication receiving module is hardly increased.
Referring to fig. 2, a functional block diagram of an apparatus 100 for adaptively enhancing a receiving channel orthogonal correction algorithm according to a preferred embodiment of the present invention is shown, wherein the apparatus 100 for adaptively enhancing a receiving channel orthogonal correction algorithm includes a segmentation module 110, a determination module 120, an adjustment module 130, and a correction module 140.
The segmenting module 110 is configured to segment the frequency of the receiving channel to obtain a plurality of frequency segments.
It is understood that the segmentation module 110 may be configured to perform the step S101.
The determining module 120 is configured to determine a corresponding target frequency segment according to a predefined local oscillation frequency.
It is understood that the determining module 120 may be configured to perform the step S102.
The adjusting module 130 is configured to select a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the received digital intermediate frequency signal, so that the amplitude deviation and the phase deviation of the digital intermediate frequency signal are within a preset range.
It is understood that the adjusting module 130 may be configured to perform the step S103.
The correction module 140 is used for performing quadrature correction on the receiving channel.
It is understood that the correction module 140 can be used to perform the step S104.
In summary, the adaptive enhancing apparatus 100 for quadrature correction algorithm of the receiving channel according to the embodiment of the present invention may perform amplitude and phase adjustment on the digital intermediate frequency signal by segmenting the quadrature error of the receiving channel according to frequency and by using a predefined corresponding preset number before the quadrature correction, so that the quadrature error of the receiving channel is reduced to a certain range, and then perform correction by the quadrature correction algorithm. Therefore, the orthogonal error of the channel is reduced, the complexity of the orthogonal correction algorithm is reduced, the convergence of the algorithm is improved, and the channel frequency segmentation method is particularly suitable for the condition that the working frequency is wide. And secondly, because the orthogonal error of the channel is reduced, the consumed hardware resource is less, the difficulty of the algorithm is not increased, and the power consumption of the wireless communication receiving module is hardly increased.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A method for enhancing adaptability of a receiving channel orthogonal correction algorithm is applied to a wireless communication receiving module, and is characterized in that the method comprises the following steps:
before the orthogonal correction, the frequency of a receiving channel is segmented to obtain a plurality of frequency segments;
determining a corresponding target frequency segment according to a predefined local oscillation frequency; the wireless communication receiving module defines a corresponding local oscillator frequency in advance, determines the local oscillator frequency according to the type of a received signal and determines a target frequency segment corresponding to the local oscillator frequency from a plurality of frequency segments according to the local oscillator frequency;
and selecting a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the received digital intermediate frequency signal so as to enable the amplitude deviation and the phase deviation of the digital intermediate frequency signal to be within a preset range.
2. The receive channel orthogonality correction algorithm adaptability enhancement method of claim 1, further comprising:
and carrying out quadrature correction on the receiving channel.
3. The method for adaptively enhancing the receiving channel orthogonal correction algorithm according to claim 1, wherein the segmenting the frequency of the receiving channel comprises:
the frequency of the receive channel is segmented according to fixed frequency segments.
4. The method for adaptively enhancing the receiving channel orthogonal correction algorithm according to claim 1, wherein the segmenting the frequency of the receiving channel comprises:
and segmenting the frequency of the receiving channel according to the similarity of the frequency characteristics.
5. A receiving channel orthogonal correction algorithm adaptability enhancing device applied to a wireless communication receiving module is characterized in that the receiving channel orthogonal correction algorithm adaptability enhancing device comprises:
the segmentation module is used for segmenting the frequency of the receiving channel before the orthogonal correction to obtain a plurality of frequency segments;
the determining module is used for determining a corresponding target frequency segment according to a predefined local oscillation frequency; the wireless communication receiving module defines a corresponding local oscillator frequency in advance, determines the local oscillator frequency according to the type of a received signal and determines a target frequency segment corresponding to the local oscillator frequency from a plurality of frequency segments according to the local oscillator frequency;
and the adjusting module is used for selecting a preset number corresponding to the target frequency segment to carry out amplitude and phase adjustment on the received digital intermediate frequency signal so as to enable the amplitude deviation and the phase deviation of the digital intermediate frequency signal to be within a preset range.
6. The apparatus for adaptively enhancing a receiving channel orthogonal correction algorithm according to claim 5, further comprising:
and the correction module is used for carrying out orthogonal correction on the receiving channel.
7. The apparatus as claimed in claim 5, wherein the segmentation module is configured to segment the frequency of the receiving channel according to a fixed frequency segment.
8. The apparatus as claimed in claim 5, wherein the segmentation module is configured to segment the frequency of the receiving channel according to the similarity of the frequency characteristics.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104811139A (en) * | 2015-04-20 | 2015-07-29 | 浙江科技学院 | Vector network analysis method based on DDS spurious frequency application |
| CN107809293A (en) * | 2017-10-09 | 2018-03-16 | 武汉滨湖电子有限责任公司 | A kind of receiving channel multichannel phase and amplitude correction device and bearing calibration |
| CN108173558A (en) * | 2018-03-12 | 2018-06-15 | 浙江传媒学院 | Stenode circuit and signal acceptance method |
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| CN104009765B (en) * | 2014-06-13 | 2015-12-30 | 东南大学 | A kind of high-performance LTE channel simulator radio frequency sending set |
| CN104540155B (en) * | 2014-12-15 | 2018-11-16 | 大唐移动通信设备有限公司 | A kind of base station frequency method of adjustment and device |
| US20170279597A1 (en) * | 2016-03-25 | 2017-09-28 | Qualcomm Incorporated | Systems and methods for fast local oscillator phase flip |
| CN107017879B (en) * | 2017-04-06 | 2021-06-22 | 上海航天测控通信研究所 | System and method for subcarrier decoding of high-frequency signal with subcarrier modulation |
| CN109327229B (en) * | 2018-10-28 | 2021-05-07 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Broadband satellite-borne receiver anti-interference system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104811139A (en) * | 2015-04-20 | 2015-07-29 | 浙江科技学院 | Vector network analysis method based on DDS spurious frequency application |
| CN107809293A (en) * | 2017-10-09 | 2018-03-16 | 武汉滨湖电子有限责任公司 | A kind of receiving channel multichannel phase and amplitude correction device and bearing calibration |
| CN108173558A (en) * | 2018-03-12 | 2018-06-15 | 浙江传媒学院 | Stenode circuit and signal acceptance method |
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