CN104753545B - A kind of IF process method, apparatus and base station - Google Patents
A kind of IF process method, apparatus and base station Download PDFInfo
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- CN104753545B CN104753545B CN201310746972.0A CN201310746972A CN104753545B CN 104753545 B CN104753545 B CN 104753545B CN 201310746972 A CN201310746972 A CN 201310746972A CN 104753545 B CN104753545 B CN 104753545B
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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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
Abstract
The invention discloses a kind of IF process method, apparatus and base stations, wherein the described method includes: determining the limited situation of wireless channel；The bandwidth of medium frequency reception filter is adjusted according to the limited situation.Described device includes: limited determination unit, for determining the limited situation of wireless channel；Adjustment unit: for adjusting the bandwidth of medium frequency reception filter according to the limited situation of the wireless channel.
Description
Technical field
The present invention relates to the IF process of communication system, especially a kind of IF process method, apparatus and base station.
Background technique
In wireless communication field, it is often necessary to by the processing from simulation to intermediate frequency, from intermediate frequency to base band.Therefore, intermediate frequency
Processing be quite crucial a part for the performance of entire receiver, how reasonably to carry out intermediate frequency filtering, down coversion etc.
It will have a direct impact on the performance of receiver.The environment of wireless communication be often it is complicated and changeable, for some specific cell, some when
Between may be noise limited, some times may be that interference-limited, current wireless communication system does not account for IF process
Corresponding adaptive intermediate frequency filtering processing is carried out by filter bandwidht adjustment to the situation that specific wireless channel is limited, is passed through
The bandwidth of single fixation uniformly accounts for, and often has an impact to the receptivity of receiver, is unfavorable for receiver receptivity
Promotion.
Summary of the invention
To solve existing technical problem, the embodiment of the present invention provides a kind of IF process method, apparatus and base station.
IF process method provided by the invention, comprising: determine the limited situation of wireless channel；According to the limited situation
Adjust the bandwidth of medium frequency reception filter.
Preferably, the limited situation for determining wireless channel, including determined according to if sampling signal wireless channel by
Limit situation.The bandwidth of medium frequency reception filter is adjusted according to the limited situation, comprising: determine filter coefficient selection parameter；
According to the coefficient of configurable filter in the parameter change ADC device, or change the coefficient of the low-pass filter introduced, or
The coefficient of person's change medium frequency reception filter.
Preferably, above-mentioned determining filter coefficient selection parameter, comprising: receiving filter coefficient selection parameter, Huo Zhe
When determining the limited situation of wireless channel according to if sampling signal, the adaptive determination filter coefficient selection parameter in base station.
IF process device provided by the invention, including limited determination unit, for determining the limited situation of wireless channel；
Adjustment unit: for adjusting the bandwidth of medium frequency reception filter according to the limited situation of the wireless channel.
Preferably, above-mentioned limited determination unit is also used to receive the filter coefficient selection ginseng of operation and maintenance center's transmission
Number.Adjustment unit is also used to adjust the bandwidth of medium frequency reception filter according to filter coefficient selection parameter.
Preferably, the bandwidth of above-mentioned adjustment medium frequency reception filter includes: the coefficient by changing medium frequency reception filter
To adjust the bandwidth of medium frequency reception filter；Or it is adjusted by the coefficient of configurable filter in change base station ADC device
The bandwidth of medium frequency reception filter；Or medium frequency reception filter is adjusted by the coefficient for the low-pass filter for changing introducing
Bandwidth.
Preferably, above-mentioned limited determination unit is the limited situation that wireless channel is determined according to if sampling signal.
The present invention also provides a kind of base stations, including any of the above-described kind of IF process device.
It, can be according to limited situation, to reception machine filter wave using IF process method, apparatus proposed by the present invention or base station
Device bandwidth is flexibly controlled, and achievees the purpose that noise or co-channel interference or adjacent frequency interference is inhibited to improve base station receiver
Performance alleviates the pressure of network planning network optimization.
Detailed description of the invention
Fig. 1 is the basic step flow chart of IF process method of the present invention；
Fig. 2 is the flow chart that the first implementation of specific limited situation is determined according to if sampling signal；
Fig. 3 is the flow chart that second of implementation of specific limited situation is determined according to if sampling signal；
Fig. 4 is the flow diagram of first embodiment of the invention；
Fig. 5 is the flow diagram of second embodiment of the invention；
Fig. 6 is the flow diagram of third embodiment of the invention；
Fig. 7 is the structural schematic diagram of the embodiment of IF process device of the present invention.
Specific embodiment
In various embodiments of the present invention: medium frequency reception filter is adjusted according to the limited situation of wireless channel locating for base station
The bandwidth of wave device.
Fig. 1 is the flow chart of the basic step of IF process method of the present invention, as shown, this method comprises:
Step 101: determining the limited situation of wireless channel；
Step 102: the bandwidth of medium frequency reception filter is adjusted according to limited situation.
Wherein, the limited situation of wireless channel includes noise limited and interference-limited, it is interference-limited include co-channel interference by
Limit and adjacent frequency are interference-limited.Specific limited situation can be joined by network management personnel by the signal-to-noise ratio or other correlations for extracting base station
Number information, such as Carrier interference ratio, determine according to the state of the art and experience；It can also be by base station in
Frequency sampling signal determines.
Base station determines specific limited situation there are two types of implementation according to if sampling signal, and Fig. 2 shows the first realities
The flow chart of existing mode, as shown in Figure 2, comprising the following steps:
Step 201: determining if sampling signal；
Step 202: determining the power P of the if sampling signal of current frequency point；
Step 203: the if sampling signal of left adjacent frequency being moved to right, is filtered, determines the intermediate-freuqncy signal for falling in left adjacent frequency
Power P r；
Step 204: the if sampling signal of right adjacent frequency being moved to left, is filtered, determines the intermediate-freuqncy signal for falling in right adjacent frequency
Power P l；
Step 205: determining CIR_Right(Carrier-To-Interference Ratio Right, right adjacent frequency carrier wave
Interference ratio)；
Specifically, can be equal to P according to CIR_Right divided by Pr, i.e. CIR_Right=P/Pr determines CIR_Right.
Step 206: determining that CIR_Left(Carrier-To-Interference Ratio Left, left adjacent frequency carrier wave are dry
Disturb ratio)；
Specifically, can be equal to P according to CIR_Left divided by Pl, i.e. CIR_Left=P/Pl is determined.
Step 207: determining that SINR(Signal to Interference plus Noise Ratio, signal and noise are dry
The power ratio disturbed, abbreviation signal-to-noise ratio)；
Specifically, lesser one can be equal in CIR_Left and CIR_Right according to SINR, i.e. SINR=min
(CIR_Left, CIR_Right) is determined.
Step 208: determining specific limited situation；
Specifically, determination is that adjacent frequency is interference-limited when SINR is less than the low threshold prestored；When SINR is greater than the height prestored
When thresholding, it is limited to be determined as co-channel interference；Other situations are then determined as noise limited.
Fig. 3 shows the process that base station determines second of implementation of specific limited situation according to if sampling signal
Figure, as shown in the figure, comprising the following steps:
Step 301: determining if sampling signal；
Step 302: determining the power P of the if sampling signal of current frequency point；
Step 303: the if sampling signal of left adjacent frequency being moved to right, is filtered, determines the intermediate-freuqncy signal for falling in left adjacent frequency
Power P r；
Step 304: the if sampling signal of right adjacent frequency being moved to left, is filtered, determines the intermediate-freuqncy signal for falling in right adjacent frequency
Power P l；
Step 305: if P is divided by the sum of Pr and Pl less than the low threshold prestored, it is determined that be that adjacent frequency is interference-limited；It is no
Then, 306 are gone to step；
Step 306: determining the autocorrelation matrix of if sampling signal, determine the quadratic sum of the mould of the diagonal element of this matrix
C1 determines the quadratic sum C2 of other off-diagonal elements, if C1 is greater than the high threshold prestored divided by C2, then it is assumed that be co-channel interference
It is limited, otherwise it is assumed that being noise limited.
Above-mentioned base station determines in two kinds of implementations of specific limited situation according to if sampling signal, is with channel width
It determines that if sampling signal can be for the gsm communication system of 200KHz, in step 201 and step 301 to adopt reception signal
It is filtered to obtain the if sampling signal of 2 samplings with 4 sampling three dB bandwidth 224KHz filters.Because of gsm communication system
The bandwidth of channel is 200KHz, so moving to right in step 203 and step 303, which can be, moves to right 200KHz, step 204 and step
Moving to left in 304, which can be, moves to left 200KHz.Step 203, being filtered in 204,303,304 can be using three dB bandwidth
45KHz filter is filtered；The high threshold that the low threshold prestored in the first implementation can be -5dB, prestore can be
3dB；The high threshold that the low threshold prestored in second of embodiment can be -3dB, prestore can be 10.Both realization sides
In formula in the determination method of P, Pr, Pl and second of implementation, the determination side of the autocorrelation matrix of if sampling signal
Method, the quadratic sum C1 of the mould of the diagonal element of the matrix, the determination method of the quadratic sum C2 of the mould of other off-diagonal elements all belong to
In the state of the art, repeat no more.
It should be known to those skilled in the art that falling in the power of the intermediate-freuqncy signal of left adjacent frequency in above two implementation
Pr and fall in right adjacent frequency intermediate-freuqncy signal power P l can because wireless channel be in co-channel interference or adjacent frequency interference due to it is different,
The autocorrelation matrix of if sampling signal can reflect the situation limited with frequency, therefore, in the first implementation can be with
The specific limited situation of wireless channel is determined by the range of the SINR obtained by P, Pl, Pr；In the second implementation
Can determine whether it is that adjacent frequency is interference-limited, then determining by the value of C1/C2 is co-channel interference by the value of P/ (Pr+Pl)
Limited or noise limited.And it the determination method of the above-mentioned if sampling signal provided by taking gsm communication system as an example, moves to left and right
The specific range moved, the filter specifically used, the specific value of the high threshold and low threshold that prestore are only a kind of preferred, in reality
Border realize during can also requirement according to communication system to receiver performance and simulation result determine.For other logical
The limited situation of letter system, wireless channel can also be determined according to the above method in conjunction with the features such as this communication system channel bandwidth
The interval (the i.e. above-mentioned amplitude for moving to right, moving to left) of frequency spectrum shift, high threshold and low threshold specific value and if sampling signal
Deng.
In general, in a wireless communication system, the bandwidth of medium frequency reception filter is larger for inhibiting co-channel interference
Be it is relatively good, bandwidth it is smaller for inhibit adjacent frequency interference be relatively good.It therefore, can be when adjacent frequency is interference-limited
The Bandwidth adjustment of medium frequency reception filter is lower bandwidth；It, can be the band of medium frequency reception filter in co-channel interference by prescribing a time limit
Width is adjusted to higher bandwidth；It can be Medium-bandwidth the Bandwidth adjustment of medium frequency reception filter in noise limited.
It should be known to those skilled in the art that the definitions of bandwidth of different communication systems is different, above-mentioned higher bandwidth,
Medium-bandwidth, lower bandwidth can be according to the concrete conditions of different communication systems come reasonable definition.Such as: for gsm system, compared with
Low bandwidth can be defined as 85kHz, and Medium-bandwidth is defined as 110kHz, and higher bandwidth can be defined as 135kHz；And for LTE
System, lower bandwidth can be defined as 9.5MHz, and Medium-bandwidth is defined as 10MHz, and higher bandwidth can be defined as 10.5MHz.
Wherein, the adjustment of medium frequency reception filter bandwidht can be realized one of in the following manner:
(1) bandwidth of medium frequency reception filter is adjusted by changing the coefficient of medium frequency reception filter；
(2) by change base station ADC(Analog to Digital Converter, analog-digital converter) in can match
The coefficient of filter is set to adjust the bandwidth of medium frequency reception filter；
Which needs ADC device used by hardware single board to support the configuration to filter coefficient.
(3) bandwidth of medium frequency reception filter is adjusted by changing the coefficient of the low-pass filter introduced.
Filter coefficient corresponding with lower bandwidth, Medium-bandwidth and higher bandwidth can design work by filter in advance
Tool provides, and belongs to the state of the art, does not elaborate here.
The method for changing above-mentioned filter coefficient, which can be, is arranged filter coefficient selection parameter in operation and maintenance center, so
Afterwards by parameter configuration message by the parameter dispensing base station, base station according to this parameter change filter coefficient of acquisition to adjust in
The bandwidth of frequency receiving filter；In the case that limited situation is to be determined by base station according to if sampling signal, it is also possible to base
It stands and changes the coefficient of filter according to limited situation, or filter coefficient selection parameter is determined according to limited situation, then root
According to the coefficient of the parameter change filter, so as to adjust the bandwidth of medium frequency reception filter.Wherein, limited situation and filter system
The corresponding relationship of several corresponding relationship and/or filter selection parameter and filter coefficient can be pre-stored in the memory of base station
In.
Above-mentioned filter coefficient selection parameter can indicate that the different values of the parameter are corresponding with RecvFilterPara
The different filter coefficients of selection are needed, the channel limitation scene that can need to distinguish according to receiver determines
RecvFilterPara value range and the corresponding filter coefficient of each value.Such as: RecvFilterPara value range can
Think 0,1, the value of 2, RecvFilterPara be 0 to indicate to need to select the corresponding coefficient of lower bandwidth filter,
The value of RecvFilterPara is that 1 expression needs to select the corresponding coefficient of Medium-bandwidth filter, RecvFilterPara's
Value is that 2 expressions need to select the corresponding coefficient of higher bandwidth filter.
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail as follows:
Fig. 4 is the schematic diagram of the first embodiment of the present invention.ADC device in base station is supported to intermediate-frequency filter in the present embodiment
The configuration of coefficient.Such as: common ADC device has three-level filtering device, is iir filter (Infinite Impulse respectively
Response Filter, wireless pulses responding digital filter), RCF filter (RAM Coefficient Filter, RAM
Coefficient filter), cic filter (Cascaded Integrator-Comb Filter, cascade integral comb filter),
Middle RCF filter is configurable, this allows for configuration of the ADC device support to intermediate frequency filter coefficient.Therefore, this implementation
Change the coefficient of the RCF filter in example by programmable configuration to realize the adjustment to intermediate frequency receiving filters bandwidth.
As shown, in the present embodiment IF process method, comprising:
Step 401: network management personnel determine the limited situation of wireless channel, and are set according to limited situation in operation and maintenance center
Set filter coefficient selection parameter；
Specifically, network management personnel can be true according to the state of the art and experience with the signal-to-noise ratio of reference base station
Determine the limited situation of base station.In the present embodiment, it is assumed that limited situation is interference-limited and interference is very big, filter coefficient selection ginseng
Number indicates that the value of RecvFilterPara is 2, and expression needs to select higher bandwidth filter pair with RecvFilterPara
The coefficient answered；
Step 402: filter coefficient selection parameter is sent to base station by operation and maintenance center；Parameter can specifically be passed through
Configuration message sends the parameters to base station；
Step 403: base station changes ADC device by programmable configuration according to the filter coefficient selection parameter received
In can configure RCF filter coefficient.
Specifically, in ADC device, RAM(Random Access Memory, random access memory) in have one section of memory block
For storing the coefficient of configurable RCF filter, base station is somebody's turn to do according to the filter coefficient selection parameter received with what is prestored
The coefficient for the low-pass filter that the selection of the corresponding relationship of parameter and filter coefficient introduces, and write again in the memory block RAM
Enter selected coefficient, the configuration to RCF filter can be realized, to achieve the purpose that adjust medium frequency reception filter bandwidht.
Fig. 5 is the schematic diagram of the second embodiment of the present invention.Low-pass filter is introduced in the present embodiment, wherein introduce
Filter can be RRC filter (Root Raised Cosine Filter, root cosine filter), by changing the filter
The coefficient of wave device realizes the adjustment to intermediate frequency receiving filters bandwidth.As shown, IF process method in the present embodiment, packet
It includes:
Step 501: network management personnel determine the limited situation of base station, and table is arranged in operation and maintenance center according to limited situation
Show the parameter to filter coefficient selection；
Specifically, network management personnel can be true according to the state of the art and experience with the signal-to-noise ratio of reference base station
Determine the limited situation of base station.In the present embodiment, limited situation is noise limited, and filter coefficient selection parameter is used
RecvFilterPara indicates that value 0, expression needs to select the corresponding coefficient of lower bandwidth filter.
Step 502: filter coefficient selection parameter is sent to base station by operation and maintenance center；
Specifically base station can be sent the parameters to by parameter configuration message.
Step 503: base station changes the coefficient of the low-pass filter introduced according to the filter coefficient selection parameter received；
Specifically, base station is according to the filter coefficient selection parameter received and the parameter prestored and filter coefficient
Corresponding relationship selection determines the coefficient of the low-pass filter introduced.
Fig. 6 is the schematic diagram of the third embodiment of the present invention.The limited situation of wireless channel is by base station root in the present embodiment
It is determined according to if sampling signal using the first aforementioned implementation.By changing medium frequency reception filter in the present embodiment
Coefficient realizes the adjustment to intermediate frequency receiving filters bandwidth.As shown, the IF process method of the present embodiment, comprising:
Step 601: determining if sampling signal；
It is filtered to obtain 2 times using 4 sampling three dB bandwidth 224KHz filters specifically, can be and will receive signal
The if sampling signal of sampling；
Step 602: determining the power P of the if sampling signal of current frequency point；
Step 603: the if sampling signal of left adjacent frequency being moved to right into 200kHz, is filtered, determination is fallen in left adjacent frequency
The power P r of frequency signal；
It is filtered specifically, can be using three dB bandwidth 45KHZ filter；
Step 604: the if sampling signal of right adjacent frequency being moved to left into 200kHz, is filtered, determination is fallen in right adjacent frequency
The power P l of frequency signal；
It is filtered specifically, can be using three dB bandwidth 45KHZ filter；
The method of above-mentioned determining P, Pr, Pl belong to the state of the art, repeat no more.
Step 605: determining CIR_Right and CIR_Left；
Specifically, can be equal to P according to CIR_Left divided by Pl, i.e. CIR_Left=P/Pl determines CIR_Left；According to
CIR_Right is equal to P divided by Pr, i.e. CIR_Right=P/Pr determines CIR_Right.
Step 606: determining SINR；
Specifically, lesser one can be equal in CIR_Left and CIR_Right according to SINR, i.e. SINR=min
(CIR_Left, CIR_Right) is determined.
Step 607: determining specific limited situation；
Specifically, determination is that adjacent frequency is interference-limited when SINR is less than -5dB, i.e. SINR < -5dB；When SINR be greater than 3dB,
That is when SINR > 3dB, it is limited to be determined as co-channel interference；Other situations are then determined as noise limited.
Step 608: changing the coefficient of medium frequency reception filter according to limited situation.
Specifically, can be by base station according to limited situation, and each limited situation for prestoring and corresponding filter coefficient
Corresponding relationship selects the coefficient for determining medium frequency reception filter, such as: when adjacent frequency is interference-limited, select lower bandwidth corresponding
Medium frequency reception filter coefficient；Co-channel interference is selected the corresponding medium frequency reception filter coefficient of higher bandwidth by prescribing a time limit；Noise by
In limited time, the corresponding medium frequency reception filter coefficient of selection Medium-bandwidth；
Or base station determines filter coefficient selection parameter according to limited situation, then according to the parameter and filter coefficient
Corresponding relationship select determine medium frequency reception filter coefficient.Such as: filter coefficient selection parameter is used
The value of RecvFilterPara indicates, RecvFilterPara value range is 0,1, the value of 2, RecvFilterPara be
0 indicates to need to select the corresponding coefficient of lower bandwidth filter, and the value of RecvFilterPara indicates to need to select medium for 1
The corresponding coefficient of bandwidth filter, the value of RecvFilterPara are that 2 expressions need to select higher bandwidth filter corresponding
Coefficient.
Specifically, setting RecvFilterPara is 2, selects the corresponding intermediate frequency of higher bandwidth in co-channel interference by limited time
Receiving filter coefficient, when adjacent frequency is interference-limited, setting RecvFilterPara is 1, and option and installment Medium-bandwidth is corresponding
Medium frequency reception filter coefficient；In noise limited, setting RecvFilterPara is 0, selects the corresponding intermediate frequency of lower bandwidth
Receiving filter coefficient.
Fig. 7 is the schematic diagram of IF process device of the present invention, as shown, the device includes: limited 701 He of determination unit
Adjustment unit 702.Wherein: adjustment unit 702: limited determination unit 701 is used for for determining the limited situation of wireless channel
The bandwidth of medium frequency reception filter is adjusted according to the limited situation of the wireless channel.
Specifically, limited determination unit 701, can be determined according to if sampling signal wireless channel locating for base station by
Limit situation；
Preferably, it is limited the filter coefficient selection parameter that determination unit 701 is also used to receive operation and maintenance center's transmission,
The parameter can be arranged according to limited situation in operation and maintenance center by network management personnel, then be sent to by operation and maintenance center limited
Determination unit 701；
Adjustment unit 702 can adjust the bandwidth of medium frequency reception filter according to the limited situation of wireless channel, can also be with
The bandwidth of medium frequency reception filter is adjusted according to filter coefficient selection parameter.
The adjustment of medium frequency reception filter bandwidht can be realized one of in the following manner:
(1) bandwidth of medium frequency reception filter is adjusted by changing the coefficient of medium frequency reception filter；
(2) bandwidth of medium frequency reception filter is adjusted by changing the coefficient of configurable filter in base station ADC device；
(3) bandwidth of medium frequency reception filter is adjusted by changing the coefficient of the low-pass filter introduced；
Filter coefficient corresponding with lower bandwidth, Medium-bandwidth and higher bandwidth can design work by filter in advance
Tool provides, and belongs to the state of the art, does not elaborate here.
The limited determination unit 701 can be realized in base station baseband processor.Adjustment unit 702 can be at intermediate frequency
It is realized in reason device.
A kind of base station provided by the invention, including any of the above-described kind of IF process device.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, the shape of hardware embodiment, software implementation or embodiment combining software and hardware aspects can be used in the present invention
Formula.Moreover, the present invention, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage and optical memory etc.).
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (8)
1. a kind of IF process method, which is characterized in that the described method includes:
Determine that the limited situation of wireless channel belongs to the limited still adjacent frequency of noise limited, co-channel interference according to if sampling signal
It is interference-limited；
The bandwidth of medium frequency reception filter is adjusted according to the limited situation；
It wherein, is lower bandwidth the Bandwidth adjustment of medium frequency reception filter when adjacent frequency is interference-limited；It is limited in co-channel interference
When, it is higher bandwidth the Bandwidth adjustment of medium frequency reception filter；In noise limited, the bandwidth tune of medium frequency reception filter
Whole is Medium-bandwidth.
2. the method according to claim 1, wherein described adjust medium frequency reception filtering according to the limited situation
The bandwidth of device, comprising:
Determine filter coefficient selection parameter；
According to the coefficient of configurable filter in the parameter change analog-digital converter ADC, or change the low pass introduced
The coefficient of filter, or change the coefficient of medium frequency reception filter.
3. according to the method described in claim 2, it is characterized in that, the determining filter coefficient selection parameter, comprising:
Receiving filter coefficient selection parameter, or
When determining the limited situation of wireless channel according to if sampling signal, the adaptive determination filter coefficient selection in base station
Parameter.
4. a kind of IF process device, which is characterized in that described device includes:
Limited determination unit, for determining that the limited situation of wireless channel belongs to noise limited, same according to if sampling signal
Frequently interference-limited or adjacent frequency is interference-limited；
Adjustment unit, for adjusting the bandwidth of medium frequency reception filter according to the limited situation of the wireless channel；
Wherein, the adjustment unit is specifically used for, when adjacent frequency is interference-limited, the Bandwidth adjustment of medium frequency reception filter be compared with
Low bandwidth；It is higher bandwidth the Bandwidth adjustment of medium frequency reception filter in co-channel interference by prescribing a time limit；In noise limited,
The Bandwidth adjustment of medium frequency reception filter is Medium-bandwidth.
5. device according to claim 4, which is characterized in that the limited determination unit is also used to receive Operation and Maintenance
The filter coefficient selection parameter that center is sent.
6. device according to claim 5, which is characterized in that the adjustment unit is also used to be selected according to filter coefficient
Parameter is selected to adjust the bandwidth of medium frequency reception filter.
7. according to the described in any item devices of claim 4 to 6, which is characterized in that the band of the adjustment medium frequency reception filter
Width includes:
The bandwidth of medium frequency reception filter is adjusted by changing the coefficient of medium frequency reception filter；Or
The band of medium frequency reception filter is adjusted by changing the coefficient of configurable filter in base station analog-digital converter ADC
It is wide；Or
The bandwidth of medium frequency reception filter is adjusted by changing the coefficient of the low-pass filter introduced.
8. a kind of base station, which is characterized in that the base station includes the described in any item IF process devices of claim 4 to 7.
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| CN201310746972.0A CN104753545B (en) | 2013-12-30 | 2013-12-30 | A kind of IF process method, apparatus and base station |
| PCT/CN2014/079399 WO2014187395A1 (en) | 2013-12-30 | 2014-06-06 | Intermediate frequency processing method, device, and base station, and computer storage medium |
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| CN103138856B (en) * | 2011-11-23 | 2016-12-14 | 南京中兴软件有限责任公司 | A kind of method and device detecting interference |
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- 2013-12-30 CN CN201310746972.0A patent/CN104753545B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101820299A (en) * | 2010-02-09 | 2010-09-01 | 北京创毅视讯科技有限公司 | Method and device for solving multipath interference and mobile multimedia broadcasting receiver |
| CN102185586A (en) * | 2011-02-25 | 2011-09-14 | 华为技术有限公司 | Scene-based filtering method and self-adapting filter |
| CN102647387A (en) * | 2012-04-09 | 2012-08-22 | 华为技术有限公司 | Same frequency interference elimination method and device |
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| CN104753545A (en) | 2015-07-01 |
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