CN110324051B - Method and device for enhancing adaptability of transmission channel orthogonal correction - Google Patents
Method and device for enhancing adaptability of transmission channel orthogonal correction Download PDFInfo
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- CN110324051B CN110324051B CN201910549611.4A CN201910549611A CN110324051B CN 110324051 B CN110324051 B CN 110324051B CN 201910549611 A CN201910549611 A CN 201910549611A CN 110324051 B CN110324051 B CN 110324051B
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Abstract
The invention discloses a method and a device for enhancing the adaptability of orthogonal correction of a transmission channel, and relates to the field of communication. The method for enhancing the adaptability of the orthogonal correction of the transmission channel is applied to a wireless communication transmission module and comprises the following steps: segmenting the frequency of a sending channel to obtain a plurality of frequency segments; determining a corresponding target frequency segment according to a predefined local oscillation frequency; and selecting preset numbers corresponding to the target frequency segment to carry out amplitude and phase adjustment on the digital baseband signal so as to enable the amplitude deviation and the phase deviation of the digital baseband signal to be within a preset range. The method and the device for enhancing the adaptability of the orthogonal correction of the transmitting channel can greatly improve the application range of the orthogonal correction algorithm, thereby improving the orthogonal performance of the channel.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to an adaptive enhancement method and apparatus for orthogonal correction of a transmission channel.
Background
In a wireless communication transmitting module, the orthogonality of a transmitting channel is usually improved by an orthogonality correction algorithm, which can correct a certain amplitude deviation and phase deviation, and for the amplitude deviation or the phase deviation exceeding the range, the correction algorithm cannot work or even deteriorates the orthogonality, especially when the working frequency is very wide, the orthogonality changes greatly due to the process deviation, and if the correctable range of the algorithm is to be improved, a more complex algorithm and more hardware resources are required.
Disclosure of Invention
In view of the above, the present invention provides an adaptive method and apparatus for transmit channel orthogonal correction 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 an adaptive enhancement method for orthogonal correction of a transmission channel, which is applied to a wireless communication transmission module, and the method includes:
segmenting the frequency of a sending 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 adjust the amplitude and the phase of the digital baseband signal so as to enable the amplitude deviation and the phase deviation of the digital baseband signal to be within a preset range.
The method for adaptively enhancing the quadrature correction of the transmission channel as described above, optionally, the method further includes:
and carrying out quadrature correction on the transmission channel.
Optionally, the method for adaptively enhancing quadrature correction of a transmission channel, where segmenting a frequency of the transmission channel includes:
and segmenting the frequency of the transmission channel according to the fixed frequency segment.
Optionally, the selecting a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the digital baseband signal, so that the amplitude deviation and the phase deviation of the digital baseband signal are within a preset range, where the method for enhancing the adaptability of the quadrature correction of the transmission channel includes:
and selecting a preset number corresponding to the target frequency segment to adjust the amplitude and the phase of the digital baseband signal, so that the amplitude deviation of the digital baseband signal is within 5dB, and the phase deviation is within 10 degrees.
In a second aspect, an embodiment of the present invention provides an apparatus for adaptively enhancing quadrature correction of a transmission channel, which is applied to a wireless communication transmission module, where the apparatus for adaptively enhancing quadrature correction of a transmission channel includes:
the segmentation module is used for segmenting the frequency of the transmission 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 adjust the amplitude and the phase of the digital baseband signal so as to enable the amplitude deviation and the phase deviation of the digital baseband signal to be within a preset range.
Optionally, the adaptive enhancing apparatus for orthogonal correction of a transmission channel as described above further includes:
and the correction module is used for carrying out orthogonal correction on the sending channel.
Optionally, the segmentation module is configured to segment the frequency of the transmission channel according to a fixed frequency segment.
Optionally, the adjusting module is configured to select a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the digital baseband signal, so that an amplitude deviation of the digital baseband signal is within 5dB and a phase deviation is within 10 °.
Compared with the prior art, the invention has the beneficial effects that:
the method and the device for enhancing the adaptability of the orthogonal correction of the transmitting channel can greatly improve the application range of the orthogonal correction algorithm without changing the algorithm, thereby improving the orthogonal performance of the channel and being particularly suitable for wide working frequency. Meanwhile, the consumed hardware resources are few, and the algorithm is not increased easily.
Drawings
Fig. 1 is a flowchart of an adaptive enhancement method for transmit channel orthogonality correction according to a preferred embodiment of the present invention.
Fig. 2 is a block diagram of an adaptive boosting apparatus for transmit channel orthogonal correction according to a preferred embodiment of the present invention.
Description of reference numerals: 100-transmission channel orthogonal correction 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 present invention provides an adaptive enhancement method for orthogonal correction of a transmission channel, which is applied to a wireless communication transmission module. The method described in fig. 1 will be explained in detail below.
Step S101, segmenting the frequency of the transmission channel.
The method provided by the embodiment of the invention can be applied to a wireless communication sending module, the wireless communication sending module is used for sending radio frequency signals to a wireless communication receiving module in communication connection with the wireless communication sending module, and the wireless communication sending module can be, but is not limited to a WiFi communication module, a ZigBee communication module and the like.
Before sending signals to the wireless communication receiving module, the wireless communication sending module firstly segments the frequency of a sending channel according to a rule preset by a user to obtain a plurality of frequency segments. When segmenting, the frequency of the transmission channel may be segmented according to fixed frequency segments, for example, the frequency of the transmission channel is 100MHZ-400MHZ, and when segmenting, one frequency segment may be divided every 100MHZ interval, that is, the frequency of the transmission channel may be divided into three frequency segments of 100MHZ-200MHZ, 200MHZ-300MHZ, and 300MHZ-400 MHZ. The frequency of the transmission channel may also be segmented according to the characteristics of the frequency, for example, a certain segment of frequency has the same characteristics, and then the segment can be divided into segments. In the embodiments of the present invention, no specific limitation is imposed.
It will be appreciated that in other embodiments, the frequency bins of the transmit channels may be pre-divided by the user.
And step S102, determining a corresponding target frequency segment according to the predefined local oscillation frequency.
The wireless communication sending module is predefined with a corresponding local oscillator frequency, which is related to the type of the signal sent by the wireless communication sending module, for example, the WCDMA communication module and the GSM communication module have different local oscillator frequencies corresponding to each other.
When the digital baseband signal is corrected, the wireless communication sending module determines the local oscillation frequency according to the type of the sent signal, and determines a target frequency segment corresponding to the local oscillation frequency from the multiple frequency segments according to the local oscillation frequency.
Step S103, selecting preset numbers corresponding to the target frequency segment to adjust the amplitude and the phase of the digital baseband signal.
Each frequency bin is predefined with a corresponding preset number that is used for amplitude and phase adjustment of the digital baseband signal. After the target frequency section is determined, the wireless communication sending module selects a preset number corresponding to the target frequency section according to the target frequency section and adjusts the amplitude and the phase of the digital baseband signal output by the wireless communication sending module, so that the amplitude deviation and the phase deviation of the digital baseband signal are within a preset range. In the embodiment of the present invention, the digital baseband signal may be an intermediate frequency signal or a low frequency signal.
The quality of the output signal of the transmission channel is closely related to the orthogonality of the transmission channel, and for the wireless communication transmission module, the orthogonality of the transmission channel usually needs to be improved by an orthogonality correction algorithm, and when the orthogonality correction algorithm is performed, if the orthogonality deviation exceeds a certain range, the orthogonality correction algorithm cannot work or even deteriorates the orthogonality, and the range is generally that the amplitude deviation is less than or equal to 5dB, and the phase deviation is less than or equal to 10 degrees. Therefore, in the embodiment of the present invention, the value of the preset range is that the amplitude range of the digital baseband signal is within 5dB, and the phase deviation of the digital baseband signal is within 10 °.
In the embodiment of the present invention, a calculation formula for adjusting the amplitude and the phase of the digital baseband 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 baseband quadrature signals dinIAnd dinQI and Q signals, cos (E), being the original digital baseband 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 orthogonal correction is performed on the transmission channel.
After the amplitude and phase adjustment of the digital baseband signal is carried out, the amplitude deviation of the digital baseband signal is kept within 5dB, and the phase deviation of the digital baseband signal is kept within 10 degrees. At this time, the wireless communication transmitting module inputs the digital baseband signal after amplitude and phase adjustment into the transmitting channel to perform quadrature correction on the transmitting channel. The orthogonal algorithm uses another local oscillation signal with the same frequency as the local oscillation signal of the sending channel to carry out down-conversion on the output signal of the sending channel and carry out analog-to-digital conversion on the output signal of the sending channel to a baseband, then the orthogonal error of the sending channel is obtained after the digital domain processing, and then the digital baseband signal which is input to the sending channel and is subjected to amplitude and phase adjustment is further adjusted, so that the orthogonal performance of the sending channel is improved, and the quality of the output signal is improved.
In summary, the method for enhancing the adaptability of the quadrature correction of the transmission channel according to the embodiment of the present invention may perform amplitude and phase adjustment on the digital baseband signal by segmenting the quadrature error of the channel according to frequency and by using the predefined corresponding preset number before the quadrature correction, so that the amplitude and the limit of the digital baseband signal are within the effective coverage range of the quadrature correction algorithm, and then perform correction by using the quadrature correction algorithm. Therefore, the application range of the orthogonal correction algorithm can be greatly expanded without changing the algorithm, so that the orthogonal performance of the channel is improved, and the method is particularly suitable for wide working frequency. Meanwhile, the consumed hardware resources are few, the algorithm difficulty is not increased, and the power consumption of the wireless communication sending module is hardly increased.
Referring to fig. 2, a functional block diagram of an apparatus 100 for adaptively enhancing transmit channel orthogonality correction according to a preferred embodiment of the present invention is shown, wherein the apparatus 100 for adaptively enhancing transmit channel orthogonality correction 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 transmission 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 digital baseband signal, so that the amplitude deviation and the phase deviation of the digital baseband 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 transmission channel.
It is understood that the correction module 140 can be used to perform the step S104.
In summary, the adaptive enhancement apparatus 100 for quadrature correction of a transmission channel according to the embodiment of the present invention may perform amplitude and phase adjustment on a digital baseband signal by segmenting a quadrature error of the channel according to a frequency and by using a predefined corresponding preset number before the quadrature correction, so that an amplitude and a limit of the digital baseband signal are within an effective coverage range of a quadrature correction algorithm, and then perform correction by using the quadrature correction algorithm. Therefore, the application range of the orthogonal correction algorithm can be greatly expanded without changing the algorithm, so that the orthogonal performance of the channel is improved, and the method is particularly suitable for wide working frequency. Meanwhile, the consumed hardware resources are few, the algorithm difficulty is not increased, and the power consumption of the wireless communication sending 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.
It is to be understood that the present invention is not limited to the precise embodiments disclosed, and that various changes and modifications may be effected therein by one of ordinary skill in the pertinent 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.
Therefore, the invention is not limited to the above embodiments, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. An adaptive enhancement method for transmission channel orthogonal correction, applied to a wireless communication transmission module, is characterized in that the method comprises:
before the orthogonal correction, segmenting the frequency of a transmitting channel to obtain a plurality of frequency segments;
determining a corresponding target frequency segment according to a predefined local oscillation frequency; the wireless communication sending module defines a corresponding local oscillator frequency in advance, determines the local oscillator frequency according to the type of a signal sent by the wireless communication sending module, 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 carry out amplitude and phase adjustment on the output digital baseband signal so as to enable the amplitude deviation and the phase deviation of the digital baseband signal to be within a preset range.
2. The method for adaptively enhancing the orthogonality correction of a transmission channel according to claim 1, further comprising:
and carrying out quadrature correction on the transmission channel.
3. The method of claim 1, wherein the segmenting the frequency of the transmission channel comprises:
and segmenting the frequency of the transmission channel according to the fixed frequency segment.
4. The method of claim 1, wherein the selecting a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the digital baseband signal so that an amplitude deviation and a phase deviation of the digital baseband signal are within a preset range comprises:
and selecting a preset number corresponding to the target frequency segment to adjust the amplitude and the phase of the digital baseband signal, so that the amplitude deviation of the digital baseband signal is within 5dB, and the phase deviation is within 10 degrees.
5. An adaptive enhancement device for transmission channel orthogonal correction, applied to a wireless communication transmission module, is characterized in that the adaptive enhancement device for transmission channel orthogonal correction comprises:
the segmentation module is used for segmenting the frequency of the sending 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 sending module defines a corresponding local oscillator frequency in advance, determines the local oscillator frequency according to the type of a signal sent by the wireless communication sending module, 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 section to adjust the amplitude and the phase of the output digital baseband signal so as to enable the amplitude deviation and the phase deviation of the digital baseband signal to be within a preset range.
6. The apparatus for adaptively enhancing orthogonal correction of transmission channel as claimed in claim 5, wherein said apparatus for adaptively enhancing orthogonal correction of transmission channel further comprises:
and the correction module is used for carrying out orthogonal correction on the sending channel.
7. The apparatus as claimed in claim 5, wherein the segmentation module is configured to segment the frequency of the transmission channel according to a fixed frequency segment.
8. The apparatus of claim 5, wherein the adjusting module is configured to select a preset number corresponding to the target frequency segment to perform amplitude and phase adjustment on the digital baseband signal, so that the amplitude deviation of the digital baseband signal is within 5dB and the phase deviation is within 10 °.
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