CN103944533B - Fluting wave filter - Google Patents
Fluting wave filter Download PDFInfo
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- CN103944533B CN103944533B CN201410135057.2A CN201410135057A CN103944533B CN 103944533 B CN103944533 B CN 103944533B CN 201410135057 A CN201410135057 A CN 201410135057A CN 103944533 B CN103944533 B CN 103944533B
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- groove width
- shift register
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Abstract
The invention discloses one kind fluting wave filter, including first adder, second adder, multiplier, shift register, groove width adjusting module and modulo operation module, the output end of the first adder and the input of second adder are connected, the output end of the second adder and the input of multiplier are connected, another road input input constant exp (j* θ) of the multiplier, the output end of the multiplier and the input of shift register are connected, the output end of the shift register is connected with groove width adjusting module all the way, another road of output end of shift register and the input of second adder are connected, the output end of the groove width adjusting module is connected with the input of first adder all the way, another road of output end of groove width adjusting module is connected with the input of modulo operation module.The influence of single tone jamming is greatly removed, system receptivity is improved.
Description
Technical field
The present invention relates to digital processing field, in particular it relates to a kind of fluting wave filter.
Background technology
At present, in a communications system, especially in wide-band communication system, due to the factor such as harmonic wave or spuious and external environment
Influence so that system often receives single tone jamming, influences system receptivity.If at this moment being carried out to interference at correspondingly fluting
Reason, can be greatly enhanced system receptivity.Although existing notching construction computing is simple, store smaller, function is single,
As shown in Figure 1.
The content of the invention
It is an object of the present invention to which in view of the above-mentioned problems, a kind of multi-functional fluting wave filter of proposition, greatly removes single-tone
The influence of interference, improves system receptivity.
To achieve the above object, the technical solution adopted by the present invention is：
One kind fluting wave filter, including first adder, second adder, multiplier, shift register, groove width adjustment mould
Block and modulo operation module, the output end of the first adder and the input of second adder are connected, second addition
The output end of device and the input of multiplier are connected, another road input input constant exp (j* θ) of the multiplier, described
The output end of multiplier and the input of shift register are connected, and the output end of the shift register adjusts mould with groove width all the way
Block is connected, and the input of another road of output end of shift register and second adder is connected, the groove width adjusting module it is defeated
Go out end to be connected with the input of first adder all the way, another road of output end of groove width adjusting module is defeated with modulo operation module
Enter end connection.
According to being preferable to carry out for the present invention, the initial value in the shift register is 0.
According to being preferable to carry out for the present invention, the numerical value of N in groove width adjusting module determines groove width, and N more vats are narrower, wherein
N round numbers is based only on the convenient consideration of realization, corresponds toSituation.
According to being preferable to carry out for the present invention, the output signal of modulo operation module reflects the intensity of single tone jamming, as
Single-tone detection or extraction are used.
Technical scheme has the advantages that：
1）It can do with the situation of gradual single-tone
2）Slotting position is controllable：When, deteriorate to DC case.
3）Modulo operation module output result Tone_Amp reflects the intensity of single tone jamming, can be used as single-tone detection or list
Sound abstraction function is used.
4）When the time is not bottleneck, it may be considered that several frequency locations of care are scanned for, so as to meet fluting
During condition, corresponding frequency position is slotted.
5）Groove width is controllable, and N determines groove width, and N is bigger, and groove is narrower.
6）If changing the number of shift register, it is possible to achieve the equal portions fluting in the range of nyquist frequency.As moved
The number of bit register be 2, then can exceptPlace's fluting is outer, while will bePlace's fluting, two groove groove width phases
Deng, and groove width respectively for single groove when half.
Technical scheme, by drawings and examples, does to technical scheme and further retouches in detail
State.
Brief description of the drawings
Fig. 1 is time domain transfer principle schematic diagram；
Fig. 2 realizes structure chart for fluting wave filter floating-point；
Fig. 3 is the fluting Filter Principle schematic diagram described in technical solution of the present invention.
With reference to accompanying drawing, reference is as follows in the embodiment of the present invention：
1- first adders；2- second adders；3- multipliers；4- shift registers；5- groove width adjusting modules；6- modulus
Computing module.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein
Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fluting filter transfer function is again
Corresponding time domain impulse response is,
,
Obvious time domain impulse response is an exponential decay curve.Its is corresponding to realize that structure has many kinds.Common transposition
Two type structures are as shown in Figure 1.
As shown in figure 3, a kind of fluting wave filter, including first adder, second adder, multiplier, shift register,
Groove width adjusting module and modulo operation module, the output end of first adder and the input of second adder are connected, and second adds
The output end of musical instruments used in a Buddhist or Taoist mass and the input of multiplier are connected, another road input input constant exp (j* θ) of multiplier, multiplier
Output end and the input of shift register connect, the output end of shift register be connected with groove width adjusting module all the way, shifting
The input of another road of output end of bit register and second adder is connected, and the output end of groove width adjusting module is all the way with first
The input connection of adder, another road of output end of groove width adjusting module is connected with the input of modulo operation module.
Wherein, the initial value in shift register is 0.Numerical value of N in groove width adjusting module determines groove width, and N is bigger
Groove is narrower.The output signal of modulo operation module reflects the intensity of single tone jamming, is used as single-tone detection or extraction.
Numeric format in Fig. 2 and Fig. 3 is represented with (S, I, F):
S:Sign bit, 0 is unsigned number；1 is signed number
I:Integer bit number
F:Fractional bits number
For example：(1,9,2) it is 9 bit integers, the signed number of 2 bit fractionals
Sat to S10 in Fig. 2：10 are saturated to than peculiar symbol plural number.
Exp (j* θ)=cos (θ)+j*sin (θ), θ is the angular frequency in above-mentioned formula。
Twiddle factor：
Modulo operation module output result, Tone_Amp is single-tone amplitude.
D is initialized as 0.For normalized radian frequency, f is the monotony frequency wanted to set up, and Fs is sampling
Frequency.The real and imaginary parts mode rotated again by register configuration is realized（1,1,14）.When realizing, by configuring cos_reg
= round(cosθ*214), sin_reg = round(sinθ*214), naturally it is also possible to realized by CORDIC.
Abs is to ask for the modulus of complex numberOperation, can use lower aprons such as to realize
Simplify, it is only necessary to which displacement relatively can be achieved：
, can be with mode be implemented as described below to improve precision：
“>>" it is right-shift operation.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (3)
1. one kind fluting wave filter, it is characterised in that including first adder, second adder, multiplier, shift register,
Groove width adjusting module and modulo operation module, the output end of the first adder and the input of second adder are connected, institute
State the output end of second adder and the input of multiplier is connected, another road input input constant exp of the multiplier
The input of (j* θ), the output end of the multiplier and shift register is connected, the output end of the shift register all the way with
Groove width adjusting module is connected, and another road of output end of shift register and the input of second adder are connected, and the groove width is adjusted
The output end of mould preparation block is connected with the input of first adder all the way, and another road of output end and the modulus of groove width adjusting module are transported
Calculate the input connection of module.
2. fluting wave filter according to claim 1, it is characterised in that the initial value of the shift register is 0.
3. fluting wave filter according to claim 2, it is characterised in that the output signal reflection of above-mentioned modulo operation module
The intensity of single tone jamming, is used as single-tone detection or extract.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410135057.2A CN103944533B (en) | 2014-04-04 | 2014-04-04 | Fluting wave filter |
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| CN201410135057.2A CN103944533B (en) | 2014-04-04 | 2014-04-04 | Fluting wave filter |
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| CN103944533A CN103944533A (en) | 2014-07-23 |
| CN103944533B true CN103944533B (en) | 2017-08-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108133239A (en) * | 2018-01-17 | 2018-06-08 | 北京中星微人工智能芯片技术有限公司 | For the method and apparatus for the treatment of classification device sample |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621285A (en) * | 2003-06-25 | 2010-01-06 | 美商内数位科技公司 | Digital high pass filter compensation module and wireless transmission/reception unit |
| CN102185587A (en) * | 2011-03-21 | 2011-09-14 | 浙江大学 | Low-power-consumption multi-order interpolation half-band filter with two-phase structure |
| CN102201797A (en) * | 2010-03-23 | 2011-09-28 | 卓胜微电子（上海）有限公司 | Digital filter device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4296518B2 (en) * | 2006-12-07 | 2009-07-15 | ソニー株式会社 | Information processing apparatus and information processing method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621285A (en) * | 2003-06-25 | 2010-01-06 | 美商内数位科技公司 | Digital high pass filter compensation module and wireless transmission/reception unit |
| CN102201797A (en) * | 2010-03-23 | 2011-09-28 | 卓胜微电子（上海）有限公司 | Digital filter device |
| CN102185587A (en) * | 2011-03-21 | 2011-09-14 | 浙江大学 | Low-power-consumption multi-order interpolation half-band filter with two-phase structure |
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Address after: 214000 A3 building, No. 777 West building, Binhu District, Binhu District, Jiangsu, Wuxi, 11 Patentee after: Jiangsu Zhuo Sheng microelectronics Limited by Share Ltd Address before: 214000 Jiangsu province Binhu District of Wuxi City Liyuan Economic Development Zone No. 1 building, twelve floor 530 room 1203 Patentee before: JIANGSU MAXSCEND TECHNOLOGY CO., LTD. |