CN105553534A - Signal processing method and device and baseband processing chip - Google Patents
Signal processing method and device and baseband processing chip Download PDFInfo
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- CN105553534A CN105553534A CN201510907400.5A CN201510907400A CN105553534A CN 105553534 A CN105553534 A CN 105553534A CN 201510907400 A CN201510907400 A CN 201510907400A CN 105553534 A CN105553534 A CN 105553534A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- 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
- H04B7/0802—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 antenna selection
- H04B7/0822—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 antenna selection according to predefined selection scheme
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- 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
- H04B7/0802—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 antenna selection
- H04B7/0825—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 antenna selection with main and with auxiliary or diversity antennas
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- 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]
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Abstract
The embodiment of the invention discloses a signal processing method and device and a baseband processing chip. The baseband processing chip has two working modes, carries out the moving correlation of a local main synchronizing signal sequence with signal received by a main antenna circuit and a signal received by an auxiliary antenna circuit, and processes the obtained correlation result. The working mode of the baseband processing chip is automatically determined, thereby achieving a purpose of enabling the baseband processing chip to be adaptive to the antenna working modes. Therefore, a designer does not need to pay attention to the working mode (a single-antenna working mode and a double-antenna working mode) of the baseband processing chip when the designer carries out system design, thereby bringing convenience to the designer.
Description
Technical field
The present invention relates to signal processing technology field, more particularly, relate to a kind of signal processing method, device and baseband processing chip.
Background technology
In the practical application of LTE system, how reducing the factor that terminal cost is the consideration when carrying out system of industry manufacturer always, the particularly use occasion of some dedicated networks, even can sacrifice some performances to bring lower product cost.A kind of possible reception antenna number being designed to reduce terminal reduced costs, thus bring antenna, simulation and radio-frequency devices, the cost of modulus switching device reduces.
As shown in Figure 1, be the basic structure schematic diagram of LTE communication module, comprise baseband processing chip, analog radio frequency device, A/D converter, digital to analog converter etc.Wherein, main body antennas paths is responsible for transceiving data, and auxiliary antennas paths is responsible for receiving data.If electronic equipment is the electronic equipment of double antenna mode of operation, then two antennas paths need to receive simultaneously, if electronic equipment is the electronic equipment of single antenna mode of operation, then in order to reduce costs, auxiliary antennas paths (in Fig. 1 shown in dotted line frame) in LTE communication module is non-existent, namely a road antennas paths is only had, now, if electronic equipment still uses the baseband processing chip by two reception antenna designs, then baseband processing chip will still calculate by two antenna receiving paths, throughput or the sensitivity of system will be reduced, therefore, the baseband processing chip by a reception antenna design must be selected.
Visible, designer, in the process of design of electronic devices, must select the baseband processing chip corresponding with antenna receive mode, makes troubles to the design of electronic equipment.Inventor is realizing finding in process of the present invention, if baseband processing chip can adaptive antenna mode of operation, and not need designer to pay close attention to baseband processing chip be chip by the design of two reception antennas, or press the chip of single receive antenna design, convenience will be brought to designer.
Therefore, baseband processing chip adaptive antenna mode of operation how is allowed to become problem demanding prompt solution.
Summary of the invention
The object of this invention is to provide a kind of signal processing method, device and baseband processing chip, to allow baseband processing chip adaptive antenna mode of operation.
For achieving the above object, the invention provides following technical scheme:
A kind of signal processing method, be applied to baseband processing chip, described baseband processing chip has main antenna path and auxiliary antennas paths, and described method comprises:
Utilize local master sync signal sequence to carry out slip to described main antenna the path signal received and the signal that described auxiliary antennas paths receives respectively relevant, obtain the some correlated results corresponding with described main antenna path and the some correlated results corresponding with described auxiliary antennas paths;
Calculate the performance number of each slip correlated results;
Determine the first sliding position that the maximum power value corresponding with described main antenna path is corresponding and the second sliding position that the maximum power value corresponding with described auxiliary antennas paths is corresponding;
If the distance between described first sliding position and described second sliding position is greater than predetermined threshold value, described baseband processing chip is configured to single antenna mode of operation, otherwise, described baseband processing chip is configured to double antenna mode of operation.
Said method, preferably, described baseband processing chip adopts maximum-ratio combing receiver architecture, describedly described baseband processing chip is configured to single antenna mode of operation comprises:
The merge coefficient of described main antenna path is set to 1, the merge coefficient of described auxiliary antennas paths is set to 0.
Said method, preferably, described baseband processing chip adopts maximum-ratio combing receiver architecture, describedly described baseband processing chip is configured to double antenna mode of operation comprises:
Determine the first yield value of the automatic gain control circuit corresponding with described main antenna path and the second yield value of the automatic gain control circuit corresponding with described auxiliary antennas paths;
Based on described first yield value and described second yield value, determine the merge coefficient of described main antenna path and the merge coefficient of described auxiliary antennas paths.
Said method, preferably, described based on described first yield value and described second yield value, determine that the merge coefficient of described main antenna path and the merge coefficient of described auxiliary antennas paths comprise:
If described first yield value is more than or equal to described second yield value, the merge coefficient of described main antenna path is the inverse of the absolute value of described first yield value and described second yield value difference, and the merge coefficient of described auxiliary antennas paths is 1;
If described first yield value is less than described second yield value, the merge coefficient of described main antenna path is 1, and the merge coefficient of described auxiliary antennas paths is the inverse of the absolute value of described first yield value and described second yield value difference.
Said method, preferably, described utilization local master sync signal sequence carries out that slip is relevant to be comprised respectively to described main antenna the path signal received and the signal that described auxiliary antennas paths receives:
When utilizing signal that described in described local master sync signal sequence pair, main antenna path receives to carry out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that described main antenna path receives; The termination sliding position of described sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that described main antenna path receives;
When utilizing signal that described in described local master sync signal sequence pair, auxiliary antennas paths receives to carry out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that described auxiliary antennas paths receives; The termination sliding position of described sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that described auxiliary antennas paths receives.
A kind of signal processing apparatus, be applied to baseband processing chip, described baseband processing chip has main antenna path and auxiliary antennas paths, and described device comprises:
Slip correlation module, relevant for utilizing local master sync signal sequence to carry out slip to described main antenna the path signal received and the signal that described auxiliary antennas paths receives respectively, obtain the some correlated results corresponding with described main antenna path and the some correlated results corresponding with described auxiliary antennas paths;
Computing module, for calculating the performance number of each slip correlated results;
First determination module, for determining the first sliding position that the maximum power value corresponding with described main antenna is corresponding, and the second sliding position that the maximum power value corresponding with described auxiliary antenna is corresponding;
Second determination module, if be greater than predetermined threshold value for the distance between described first sliding position and described second sliding position, described baseband processing chip is configured to single antenna mode of operation, otherwise, described baseband processing chip is configured to double antenna mode of operation.
Said apparatus, preferably, described baseband processing chip adopts maximum-ratio combing receiver architecture, is being configured in single antenna mode of operation by described baseband processing chip, described second determination module specifically for,
The merge coefficient of described main antenna path is set to 1, the merge coefficient of described auxiliary antennas paths is set to 0.
Said apparatus, preferably, described baseband processing chip adopts maximum-ratio combing receiver architecture, is being configured in double antenna mode of operation by described baseband processing chip, described second determination module specifically for,
Determine the first yield value of the automatic gain control circuit corresponding with described main antenna path and the second yield value of the automatic gain control circuit corresponding with described auxiliary antennas paths;
Based on described first yield value and described second yield value, determine the merge coefficient of described main antenna path and the merge coefficient of described auxiliary antennas paths.
Said apparatus, preferably, based on described first yield value and described second yield value, determines the merge coefficient of described main antenna path and the merge coefficient aspect of described auxiliary antennas paths, described second determination module specifically for,
If described first yield value is more than or equal to described second yield value, the merge coefficient of described main antenna path is the inverse of the absolute value of described first yield value and described second yield value difference, and the merge coefficient of described auxiliary antennas paths is 1;
If described first yield value is less than described second yield value, the merge coefficient of described main antenna path is 1, and the merge coefficient of described auxiliary antennas paths is the inverse of the absolute value of described first yield value and described second yield value difference.
A kind of baseband processing chip, comprises main antenna path, auxiliary antennas paths and the signal processing apparatus as above described in any one.
Known by above scheme, a kind of signal processing method, device and baseband processing chip that the application provides, utilize local master sync signal sequence to carry out slip to main antenna the path signal received and the signal that auxiliary antennas paths receives respectively relevant, calculate the performance number of each slip correlated results; Determine the first sliding position that the maximum power value corresponding with main antenna path is corresponding and the second sliding position that the maximum power value corresponding with auxiliary antennas paths is corresponding; If the distance between the first sliding position and the second sliding position is greater than predetermined threshold value, baseband processing chip is configured to single antenna mode of operation, otherwise, baseband processing chip is configured to double antenna mode of operation.That is, the signal processing method that the embodiment of the present invention provides, device and baseband processing chip, baseband processing chip has two kinds of mode of operations, local master sync signal sequence is carried out slip to main antenna the path signal received and the signal that auxiliary antennas paths receives respectively relevant, and the correlated results obtained is processed, automatically the mode of operation of baseband processing chip is determined, realization allows baseband processing chip adaptive antenna mode of operation, thus designer is when carrying out system, need not pay close attention to baseband processing chip is again single antenna mode of operation or double antenna mode of operation, thus provide convenient to designer.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the basic structure schematic diagram of general LTE communication module;
A kind of realization flow figure of the signal processing method that Fig. 2 provides for the embodiment of the present application;
One baseband processing chip being configured to double antenna mode of operation that Fig. 3 provides for the embodiment of the present application realizes flow graph;
A kind of structural representation of the signal processing apparatus that Fig. 4 provides for the embodiment of the present application.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification and claims and above-mentioned accompanying drawing are for distinguishing similar part, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so that the embodiment of the application described herein can be implemented with the order except illustrated here.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not paying the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The signal processing method that the embodiment of the present invention provides and application of installation are in baseband processing chip, and this baseband processing chip is integrated with main antenna path and auxiliary antennas paths, and wherein, transceiving data is responsible for by main antenna path, and auxiliary antennas paths is responsible for receiving data.
Refer to Fig. 2, a kind of realization flow figure of the signal processing method that Fig. 2 provides for the embodiment of the present application, can comprise:
Step S21: utilize the local master sync signal sequence (being called for short PSS) produced to carry out slip to main antenna the path signal received and the signal that auxiliary antennas paths receives respectively relevant, obtain the some correlated results corresponding with main antenna path and the some correlated results corresponding with auxiliary antennas paths;
Namely local master sync signal sequence is the local master sync signal sequence produced.In the embodiment of the present invention, the signal not only utilizing local master sync signal sequence pair main antenna path to receive carries out slip and is correlated with, and the signal also utilizing the auxiliary antennas paths of local master sync signal sequence pair to receive carries out slip and is correlated with.
When carrying out sliding relevant, the length of sliding window is the length of local PSS, as shown in Figure 1, baseband processing chip from main antenna path receive signal that signal and auxiliary antennas paths receive be all sampled by A/D converter after signal, i.e. digital signal.Therefore, in the embodiment of the present invention, the signal that sliding window is receiving slides by sampled point, often slides once, and the signal received local PSS and sliding window covered carries out correlation computations.
The PSS produced due to this locality has three, therefore, in the position of each sliding window, the signal received that each local PSS all covers with sliding window carries out a correlation computations, that is, for the signal that main antenna path receives, three correlation computations are all carried out in each sliding window position, in like manner, for the signal that auxiliary antennas paths receives, three correlation computations are also all carried out in each sliding window position.
Step S22: the performance number calculating each slip correlated results;
To the result with correlation computations each time, all calculate the performance number of correlated results.Concrete, the performance number of correlated results can be the mould of correlated results square.
Step S23: determine the first sliding position that the maximum power value corresponding with main antenna path is corresponding and the second sliding position that the maximum power value corresponding with auxiliary antennas paths is corresponding;
In the embodiment of the present invention, from the performance number of the some slip correlated results corresponding with main antenna, determine maximum power value, and determine maximum power value from the performance number of some slip correlated results corresponding with auxiliary antennas paths.
The first sliding position that the maximum power value corresponding with main antenna path is corresponding can think the original position of master sync signal sequence place symbol in the LTE subframe received by main antenna path.The second sliding position that the maximum power value corresponding with auxiliary antennas paths is corresponding can think the original position of master sync signal sequence place symbol in the LTE subframe received by auxiliary antennas paths.
Step S24: if the distance between the first sliding position and the second sliding position is greater than predetermined threshold value, baseband processing chip is configured to single antenna mode of operation, otherwise, baseband processing chip is configured to double antenna mode of operation.
If the distance between the first sliding position and the second sliding position is greater than predetermined threshold value, illustrate that the auxiliary antenna receiving path of baseband processing chip does not have the devices such as external antenna, analog radio frequency device and A/D converter, and only have the devices such as main antenna path external antenna, analog radio frequency device and A/D converter.
If the distance between the first sliding position and the second sliding position is less than or equal to predetermined threshold value, the device such as auxiliary antenna receiving path and the equal external antenna of main antenna path, analog radio frequency device and A/D converter of baseband processing chip is described.
Optionally, predetermined threshold value can be 20 sampled points.
That is, in the embodiment of the present invention, baseband processing chip both can be operated in single antenna mode of operation, also can be operated in double antenna mode of operation.Specific works, in which kind of pattern, is determined according to the distance between the original position (i.e. the second sliding position) of master sync signal sequence place symbol in the signal received in the original position (i.e. the first sliding position) of master sync signal sequence place symbol in the signal received in main antenna path and auxiliary antennas paths by baseband processing chip.If this distance is greater than predetermined threshold value, determine that baseband processing chip is with single antenna mode of operation, otherwise, determine that baseband processing chip is with double antenna mode of operation.
The signal processing method that the embodiment of the present invention provides, baseband processing chip has two kinds of mode of operations, local master sync signal sequence is carried out slip to main antenna the path signal received and the signal that auxiliary antennas paths receives respectively relevant, and the correlated results obtained is processed, automatically the mode of operation of baseband processing chip is determined, realization allows baseband processing chip adaptive antenna mode of operation, thus designer is when carrying out system, need not pay close attention to baseband processing chip is again single antenna mode of operation or double antenna mode of operation, thus provide convenient to designer.
Optionally, in the embodiment of the present invention, baseband processing chip adopts maximum-ratio combing (maximumratiocombining, MRC) receiver architecture.
In maximum-ratio combing receiver architecture, need to obtain the merge coefficient of main antenna path and the merge coefficient of auxiliary antennas paths, so that the signal that the signal received main antenna path and auxiliary antennas paths receive carries out merging treatment.
Optionally, by a kind of implementation stating baseband processing chip and be configured to single antenna mode of operation can be:
The merge coefficient of main antenna path is set to 1, the merge coefficient of auxiliary antennas paths is set to 0.
That is, in the embodiment of the present invention, baseband processing chip still calculates by two antenna receiving paths, but because the merge coefficient of auxiliary antennas paths is set to 0, be equivalent to auxiliary antennas paths side and do not receive signal, baseband processing chip is equivalent to calculate by single antenna path, can not reduce throughput and the sensitivity of system.
Optionally, one baseband processing chip being configured to double antenna mode of operation realizes flow graph as shown in Figure 3, can comprise:
Step S31: the first yield value determining the automatic gain control circuit corresponding with main antenna path, and the second yield value determining the automatic gain control circuit corresponding with auxiliary antennas paths;
Step S32: based on the first yield value and the second yield value, determines the merge coefficient of main antenna path and the merge coefficient of auxiliary antennas paths.
In the embodiment of the present invention, according to the merge coefficient of the yield value determination two-way antenna receiving path of the automatic gain control circuit of two-way antenna receiving path.
Optionally, based on the first yield value and the second yield value, determine that a kind of implementation of the merge coefficient of main antenna path and the merge coefficient of auxiliary antennas paths can be:
If the first yield value is more than or equal to the second yield value, then the merge coefficient of main antenna path is: the inverse of the absolute value of the first yield value and the second yield value difference; The merge coefficient of auxiliary antennas paths is 1;
The merge coefficient formula of main antenna path can be expressed as:
α＝1/|gain0-gain1|(1)
Wherein, α is the merge coefficient of main antenna path, and gain0 is the first yield value, and gain1 is the second yield value.
If the first yield value is less than the second yield value, then the merge coefficient of main antenna path is 1; The merge coefficient of auxiliary antennas paths is: the inverse of the absolute value of the first yield value and the second yield value difference.
The merge coefficient formula of auxiliary antennas paths can be expressed as:
β＝1/|gain0-gain1|(2)
Wherein, β is the merge coefficient of auxiliary antennas paths, and gain0 is the first yield value, and gain1 is the second yield value.
Optionally, utilize local master sync signal sequence respectively to main antenna the path signal received and the signal that auxiliary antennas paths receives carry out slide relevant specific implementation can be:
When the signal utilizing local master sync signal sequence pair main antenna path to receive carries out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that main antenna path receives; The termination sliding position of sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that main antenna path receives;
When the signal utilizing the auxiliary antennas paths of local master sync signal sequence pair to receive carries out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that auxiliary antennas paths receives; The termination sliding position of sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that auxiliary antennas paths receives.
That is, in the embodiment of the present invention, the signal utilizing local master sync signal sequence pair main antenna path to receive carries out relevant mode of sliding, identical with the signal utilizing the auxiliary antennas paths of local master sync signal sequence pair to receive carry out the sliding mode of being correlated with.The position of each N number of sampled point before and after the original position of sliding position PSS sequence place symbol in the signal received, altogether 2N sliding position.Such as, in the LTE subframe received, if the original position of PSS sequence place symbol is M sampled point, then in the embodiment of the present invention, sliding window slides M-N sampled point from LTE subframe, and next sliding position is M-N+1 sampled point, more next sampled point is M-N+1 sampled point, the rest may be inferred, stops sliding until sliding window slides into M+N sampled point.
Optionally, correlation computations can be carried out by following formula:
Wherein, subscript
rXfor distinguishing main antenna path and auxiliary antennas paths, as
rX=0represent main antenna path,
rX=1represent auxiliary antennas paths; Nid2 represents the index of the master sync signal of current area, and value is 0,1,2; Local_PSS is the local master sync signal sequence produced; Local_PSS
*(Nid2, i) represents that call number is the conjugation value of i-th value of the local master sync signal sequence of Nid2; Rx_Data is the time-domain signal sequence that antenna receives; Corr_Result is correlated results; N is the original position of sliding window, and value can be 0 ~ 199, totally 200 points, and front 100 sampled points of PSS place symbol original position in the LTE subframe be currently received can be selected in reality to rear 100 sampled points.
Corresponding with embodiment of the method, the embodiment of the present invention also provides a kind of signal processing apparatus, and a kind of structural representation of the signal processing apparatus that the embodiment of the present invention provides as shown in Figure 4, can comprise:
Slip correlation module 41, computing module 42, the first determination module 43 and the second determination module 44; Wherein,
Slip correlation module 41 is relevant for utilizing local master sync signal sequence to carry out slip to main antenna the path signal received and the signal that auxiliary antennas paths receives respectively, obtains the some correlated results corresponding with main antenna path and the some correlated results corresponding with auxiliary antennas paths;
Namely local master sync signal sequence is the local master sync signal sequence produced.In the embodiment of the present invention, the signal not only utilizing local master sync signal sequence pair main antenna path to receive carries out slip and is correlated with, and the signal also utilizing the auxiliary antennas paths of local master sync signal sequence pair to receive carries out slip and is correlated with.
When carrying out sliding relevant, the length of sliding window is the length of local PSS, as shown in Figure 1, baseband processing chip from main antenna path receive signal that signal and auxiliary antennas paths receive be all sampled by A/D converter after signal, i.e. digital signal.Therefore, in the embodiment of the present invention, the signal that sliding window is receiving slides by sampled point, often slides once, and the signal received local PSS and sliding window covered carries out correlation computations.
The PSS produced due to this locality has three, therefore, in the position of each sliding window, the signal received that each local PSS all covers with sliding window carries out a correlation computations, that is, for the signal that main antenna path receives, three correlation computations are all carried out in each sliding window position, in like manner, for the signal that auxiliary antennas paths receives, three correlation computations are also all carried out in each sliding window position.
Computing module 42 is for calculating the performance number of each slip correlated results;
To the result with correlation computations each time, all calculate the performance number of correlated results.Concrete, the performance number of correlated results can be the mould of correlated results square.
First determination module 43 is for determining the first sliding position that the maximum power value corresponding with main antenna is corresponding, and the second sliding position that the maximum power value corresponding with auxiliary antenna is corresponding;
In the embodiment of the present invention, from the performance number of the some slip correlated results corresponding with main antenna, determine maximum power value, and determine maximum power value from the performance number of some slip correlated results corresponding with auxiliary antennas paths.
The first sliding position that the maximum power value corresponding with main antenna path is corresponding can think the original position of master sync signal sequence place symbol in the LTE subframe received by main antenna path.The second sliding position that the maximum power value corresponding with auxiliary antennas paths is corresponding can think the original position of master sync signal sequence place symbol in the LTE subframe received by auxiliary antennas paths.
If the second determination module 44 is greater than predetermined threshold value for the distance between the first sliding position and the second sliding position, baseband processing chip is configured to single antenna mode of operation, otherwise, baseband processing chip is configured to double antenna mode of operation.
If the distance between the first sliding position and the second sliding position is greater than predetermined threshold value, illustrate that the auxiliary antenna receiving path of baseband processing chip does not have the devices such as external antenna, analog radio frequency device and A/D converter, and only have the devices such as main antenna path external antenna, analog radio frequency device and A/D converter.
If the distance between the first sliding position and the second sliding position is less than or equal to predetermined threshold value, the device such as auxiliary antenna receiving path and the equal external antenna of main antenna path, analog radio frequency device and A/D converter of baseband processing chip is described.
Optionally, predetermined threshold value can be 20 sampled points.
That is, in the embodiment of the present invention, baseband processing chip both can be operated in single antenna mode of operation, also can be operated in double antenna mode of operation.Specific works, in which kind of pattern, is determined according to the distance between the original position (i.e. the second sliding position) of master sync signal sequence place symbol in the signal received in the original position (i.e. the first sliding position) of master sync signal sequence place symbol in the signal received in main antenna path and auxiliary antennas paths by baseband processing chip.If this distance is greater than predetermined threshold value, determine that baseband processing chip is with single antenna mode of operation, otherwise, determine that baseband processing chip is with double antenna mode of operation.
The signal processing apparatus that the embodiment of the present invention provides, baseband processing chip has two kinds of mode of operations, local master sync signal sequence is carried out slip to main antenna the path signal received and the signal that auxiliary antennas paths receives respectively relevant, and the correlated results obtained is processed, automatically the mode of operation of baseband processing chip is determined, realization allows baseband processing chip adaptive antenna mode of operation, thus designer is when carrying out system, need not pay close attention to baseband processing chip is again single antenna mode of operation or double antenna mode of operation, thus provide convenient to designer.
Optionally, in the embodiment of the present invention, baseband processing chip adopts maximum-ratio combing (maximumratiocombining, MRC) receiver architecture.
In maximum-ratio combing receiver architecture, need to obtain the merge coefficient of main antenna path and the merge coefficient of auxiliary antennas paths, so that the signal that the signal received main antenna path and auxiliary antennas paths receive carries out merging treatment.
Optionally, be configured to by baseband processing chip in single antenna mode of operation, the second determination module 44 specifically may be used for,
The merge coefficient of main antenna path is set to 1, the merge coefficient of auxiliary antennas paths is set to 0.
That is, in the embodiment of the present invention, baseband processing chip still calculates by two antenna receiving paths, but because the merge coefficient of auxiliary antennas paths is set to 0, be equivalent to auxiliary antennas paths side and do not receive signal, baseband processing chip is equivalent to calculate by single antenna path, can not reduce throughput and the sensitivity of system.
Optionally, be configured to by baseband processing chip in double antenna mode of operation, the second determination module 44 specifically may be used for,
Determine the first yield value of the automatic gain control circuit corresponding with main antenna path, and determine the second yield value of the automatic gain control circuit corresponding with auxiliary antennas paths;
Based on the first yield value and the second yield value, determine the merge coefficient of main antenna path and the merge coefficient of auxiliary antennas paths.
In the embodiment of the present invention, according to the merge coefficient of the yield value determination two-way antenna receiving path of the automatic gain control circuit of two-way antenna receiving path.
Optionally, based on the first yield value and the second yield value, determine the merge coefficient of main antenna path and the merge coefficient aspect of auxiliary antennas paths, the second determination module 44 specifically may be used for,
If the first yield value is more than or equal to the second yield value, the merge coefficient of main antenna path is the inverse of the absolute value of the first yield value and the second yield value difference, and the merge coefficient of auxiliary antennas paths is 1;
If the first yield value is less than the second yield value, the merge coefficient of main antenna path is 1, and the merge coefficient of auxiliary antennas paths is the inverse of the absolute value of the first yield value and the second yield value difference.
Optionally, slip correlation module 41 specifically may be used for, when the signal utilizing local master sync signal sequence pair main antenna path to receive carries out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that main antenna path receives; The termination sliding position of sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that main antenna path receives;
When the signal utilizing the auxiliary antennas paths of local master sync signal sequence pair to receive carries out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that auxiliary antennas paths receives; The termination sliding position of sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that auxiliary antennas paths receives.
That is, in the embodiment of the present invention, the signal utilizing local master sync signal sequence pair main antenna path to receive carries out relevant mode of sliding, identical with the signal utilizing the auxiliary antennas paths of local master sync signal sequence pair to receive carry out the sliding mode of being correlated with.The position of each N number of sampled point before and after the original position of sliding position PSS sequence place symbol in the signal received, altogether 2N sliding position.Such as, in the LTE subframe received, if the original position of PSS sequence place symbol is M sampled point, then in the embodiment of the present invention, sliding window slides M-N sampled point from LTE subframe, and next sliding position is M-N+1 sampled point, more next sampled point is M-N+1 sampled point, the rest may be inferred, stops sliding until sliding window slides into M+N sampled point.
The embodiment of the present invention also discloses a kind of baseband processing chip, and this baseband processing chip has main antenna path, auxiliary antennas paths and signal processing apparatus as above.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a signal processing method, is applied to baseband processing chip, and described baseband processing chip has main antenna path and auxiliary antennas paths, it is characterized in that, described method comprises:
Utilize local master sync signal sequence to carry out slip to described main antenna the path signal received and the signal that described auxiliary antennas paths receives respectively relevant, obtain the some correlated results corresponding with described main antenna path and the some correlated results corresponding with described auxiliary antennas paths;
Calculate the performance number of each slip correlated results;
Determine the first sliding position that the maximum power value corresponding with described main antenna path is corresponding and the second sliding position that the maximum power value corresponding with described auxiliary antennas paths is corresponding;
If the distance between described first sliding position and described second sliding position is greater than predetermined threshold value, described baseband processing chip is configured to single antenna mode of operation, otherwise, described baseband processing chip is configured to double antenna mode of operation.
2. method according to claim 1, is characterized in that, described baseband processing chip adopts maximum-ratio combing receiver architecture, describedly described baseband processing chip is configured to single antenna mode of operation comprises:
The merge coefficient of described main antenna path is set to 1, the merge coefficient of described auxiliary antennas paths is set to 0.
3. method according to claim 1, is characterized in that, described baseband processing chip adopts maximum-ratio combing receiver architecture, describedly described baseband processing chip is configured to double antenna mode of operation comprises:
Determine the first yield value of the automatic gain control circuit corresponding with described main antenna path and the second yield value of the automatic gain control circuit corresponding with described auxiliary antennas paths;
Based on described first yield value and described second yield value, determine the merge coefficient of described main antenna path and the merge coefficient of described auxiliary antennas paths.
4. method according to claim 3, is characterized in that, described based on described first yield value and described second yield value, determines that the merge coefficient of described main antenna path and the merge coefficient of described auxiliary antennas paths comprise:
If described first yield value is more than or equal to described second yield value, the merge coefficient of described main antenna path is the inverse of the absolute value of described first yield value and described second yield value difference, and the merge coefficient of described auxiliary antennas paths is 1;
If described first yield value is less than described second yield value, the merge coefficient of described main antenna path is 1, and the merge coefficient of described auxiliary antennas paths is the inverse of the absolute value of described first yield value and described second yield value difference.
5. method according to claim 1, is characterized in that, described utilization local master sync signal sequence carries out that slip is relevant to be comprised respectively to described main antenna the path signal received and the signal that described auxiliary antennas paths receives:
When utilizing signal that described in described local master sync signal sequence pair, main antenna path receives to carry out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that described main antenna path receives; The termination sliding position of described sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that described main antenna path receives;
When utilizing signal that described in described local master sync signal sequence pair, auxiliary antennas paths receives to carry out sliding relevant, the initial sliding position of sliding window is arranged in the position of the N number of point before the original position of the signal PSS sequence place symbol that described auxiliary antennas paths receives; The termination sliding position of described sliding window is arranged in the position of the N number of point after the original position of the signal PSS sequence place symbol that described auxiliary antennas paths receives.
6. a signal processing apparatus, is applied to baseband processing chip, and described baseband processing chip has main antenna path and auxiliary antennas paths, it is characterized in that, described device comprises:
Slip correlation module, relevant for utilizing local master sync signal sequence to carry out slip to described main antenna the path signal received and the signal that described auxiliary antennas paths receives respectively, obtain the some correlated results corresponding with described main antenna path and the some correlated results corresponding with described auxiliary antennas paths;
Computing module, for calculating the performance number of each slip correlated results;
First determination module, for determining the first sliding position that the maximum power value corresponding with described main antenna is corresponding, and the second sliding position that the maximum power value corresponding with described auxiliary antenna is corresponding;
Second determination module, if be greater than predetermined threshold value for the distance between described first sliding position and described second sliding position, described baseband processing chip is configured to single antenna mode of operation, otherwise, described baseband processing chip is configured to double antenna mode of operation.
7. device according to claim 6, is characterized in that, described baseband processing chip adopts maximum-ratio combing receiver architecture, is being configured in single antenna mode of operation by described baseband processing chip, described second determination module specifically for,
The merge coefficient of described main antenna path is set to 1, the merge coefficient of described auxiliary antennas paths is set to 0.
8. device according to claim 6, is characterized in that, described baseband processing chip adopts maximum-ratio combing receiver architecture, is being configured in double antenna mode of operation by described baseband processing chip, described second determination module specifically for,
Determine the first yield value of the automatic gain control circuit corresponding with described main antenna path and the second yield value of the automatic gain control circuit corresponding with described auxiliary antennas paths;
Based on described first yield value and described second yield value, determine the merge coefficient of described main antenna path and the merge coefficient of described auxiliary antennas paths.
9. device according to claim 8, it is characterized in that, based on described first yield value and described second yield value, determine the merge coefficient of described main antenna path and the merge coefficient aspect of described auxiliary antennas paths, described second determination module specifically for
If described first yield value is more than or equal to described second yield value, the merge coefficient of described main antenna path is the inverse of the absolute value of described first yield value and described second yield value difference, and the merge coefficient of described auxiliary antennas paths is 1;
If described first yield value is less than described second yield value, the merge coefficient of described main antenna path is 1, and the merge coefficient of described auxiliary antennas paths is the inverse of the absolute value of described first yield value and described second yield value difference.
10. a baseband processing chip, is characterized in that, comprises main antenna path, auxiliary antennas paths and the signal processing apparatus as described in claim 6-9 any one.
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