CN104617965A - Method and device for improving receiver sensitivity - Google Patents
Method and device for improving receiver sensitivity Download PDFInfo
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- CN104617965A CN104617965A CN201410826933.6A CN201410826933A CN104617965A CN 104617965 A CN104617965 A CN 104617965A CN 201410826933 A CN201410826933 A CN 201410826933A CN 104617965 A CN104617965 A CN 104617965A
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- received signal
- signal strength
- signal quality
- interior interference
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Abstract
The invention provides a method and a device for improving receiver sensitivity. The method comprises obtaining receipt signals, and performing in-band interference elimination on the receipt signals according to the signal quality of the receipt signals. By means of the method and the device, white Gaussian noise in the receipt signals can be removed effectively, and the receiver sensitivity is improved.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method and the device that improve receiver sensitivity.
Background technology
In the development of modern communications, the utilization rate of digital system radio receiver is while improving constantly, analog fm (Frequency Modulation, being called for short FM) the FM receiver (being commonly called as broadcast receiver) of system is also very popular, and often come across in mobile phone and other electronic handset (as MP3 player).
In the prior art, usual employing monophony and stereo mix function (FM stereo-monoblending), sound high frequency filtering function (High Cut Control, HCC), and " soft quiet " function (Soft Mute) improves the receiving sensitivity of FM receiver, to provide stereosonic sound effect to user.
But, adopting above-mentioned prior art to improve in the process of FM receiving sensitivity, the white Gaussian noise of major effect receiver sensitivity but cannot be eliminated.
Summary of the invention
The invention provides a kind of method and the device that improve receiver sensitivity, in order to solve the problem of the white Gaussian noise of receiver sensitivity of cannot eliminating the effects of the act.
First aspect of the present invention is to provide a kind of method improving receiver sensitivity, comprising:
Obtain Received signal strength;
According to the signal quality of described Received signal strength, interior interference cancellation operation is with to described Received signal strength.
Optionally, the described signal quality according to described Received signal strength, interior interference cancellation operation is with to described Received signal strength, comprises:
Described signal quality and threshold value are compared, determines the tupe that described Received signal strength is eliminated with interior interference;
According to described tupe, interior interference cancellation operation is with to described Received signal strength.
Optionally, described described signal quality and threshold value to be compared, determine the tupe that described Received signal strength is eliminated with interior interference, comprising:
If determine, described signal quality is greater than first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or
If determine, described signal quality is less than or equal to described first threshold, then control described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
Optionally, described described signal quality and threshold value to be compared, determine the tupe that described Received signal strength is eliminated with interior interference, comprising:
If determine, described signal quality is within the scope of first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or
If determine, described signal quality is within the scope of Second Threshold, then control described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
Optionally, described tupe at least comprises: delay disposal and filtering process.
Second aspect of the present invention is to provide a kind of device improving receiver sensitivity, comprising:
Acquisition module, for obtaining Received signal strength;
In-band noise processor, for the signal quality according to described Received signal strength, is with interior interference cancellation operation to described Received signal strength.
Optionally, also comprise: described in-band noise Processing for removing device, comprising: in-band noise controller and in-band noise arrester;
Described in-band noise controller, for described signal quality and threshold value being compared, determines the tupe eliminated with interior interference described Received signal strength;
Described in-band noise arrester, for according to described tupe, is with interior interference cancellation operation to described Received signal strength.
Optionally, described in-band noise controller, if specifically for determining that described signal quality is greater than first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate delay disposal to described Received signal strength; Or described signal quality is less than or equal to described first threshold if determine, then controls described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate low-pass filtering operation to described Received signal strength.
Optionally, described in-band noise controls arrester, if specifically for determining that described signal quality is within the scope of first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or described signal quality is within the scope of Second Threshold if determine, then controls described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.。
Optionally, described tupe at least comprises: delay disposal and filtering process.
The method of raising receiver sensitivity provided by the invention and device, by obtaining Received signal strength, then, according to the signal quality of this Received signal strength, carry out to received signal being with interior interference cancellation operation, thus the white Gaussian noise can effectively removed in Received signal strength, and then improve the sensitivity of receiver.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the present invention improves method one embodiment of receiver sensitivity;
Fig. 2 is the schematic flow sheet that the present invention improves another embodiment of method of receiver sensitivity;
Fig. 3 is the signal flow diagram that the present invention improves method one embodiment of receiver sensitivity;
Fig. 4 is the structural representation that the present invention improves the lower frequency device of method one embodiment of receiver sensitivity;
Fig. 5 is the design sketch that the present invention improves receiver sensitivity method one embodiment;
Fig. 6 is the structural representation that the present invention improves device one embodiment of receiver sensitivity;
Fig. 7 is the structural representation that the present invention improves another embodiment of device of receiver sensitivity;
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is 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 making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The method of the raising receiver sensitivity that the embodiment of the present invention provides and device can be applied to receiver when receiving Received signal strength.The method of the raising receiver sensitivity that the present embodiment provides specifically can perform by improving receiver sensitivity device, and this receiver sensitivity device can adopt the mode of software and/or hardware to realize.Below the method for the raising receiver sensitivity that the present embodiment provides and device are described in detail.
Fig. 1 is the schematic flow sheet that the present invention improves method one embodiment of receiver sensitivity, and as shown in Figure 1, the executive agent of the present embodiment is receiver, and wherein, this receiver can receive and export monophonic signal and/or stereophonic signal.The applicable scene of the present embodiment is that receiver is when receiving Received signal strength.The method of this raising receiver sensitivity comprises the steps:
Step 101, acquisition Received signal strength;
In the present embodiment, receiver can receive Received signal strength on channel predetermined, or, after receiver can receive broadcast singal, obtain Received signal strength through resolving.
Step 102, signal quality according to this Received signal strength, carry out being with interior interference cancellation operation to received signal.
In the present embodiment, this signal quality is what determine according to Received signal strength, or this signal quality is that those skilled in the art are according to being suitable for the default value of scene.Further, this signal quality is that the specific implementation determined according to Received signal strength comprises, obtains with calculating through carrying out add up to multiple Received signal strength, that is, and the multiple Received signal strength carrying out from restraining calculating acquisition of sampling.
Concrete, the in-band noise controller in receiver can according to unlike signal quality, interference cancellation operation in the band that in corresponding control cincture, noise eliminator carries out different mode to received signal.
For example, the in-band noise controller in receiver is according to signal quality, and in control cincture, noise eliminator carries out being with interior interference cancellation operation to received signal, can comprise following implementation.
The first implementation, determines that signal quality is greater than first threshold, and in control cincture, noise eliminator carries out delay disposal to received signal;
The second implementation, determines that signal quality is less than first threshold, and in control cincture, noise eliminator carries out low-pass filtering operation to received signal.Wherein, this first threshold can be that art technology people is according to the value being suitable for scene settings.
In the present embodiment, by obtaining Received signal strength, then, according to the signal quality of this Received signal strength, carrying out to received signal being with interior interference cancellation operation, thus effectively can remove the white Gaussian noise in Received signal strength, and then improve the sensitivity of receiver.
Fig. 2 is the schematic flow sheet that the present invention improves another embodiment of method of receiver sensitivity, and Fig. 3 is the signal flow diagram that the present invention improves method one embodiment of receiver sensitivity, and as shown in Figure 2, as shown in Figure 3, the method can comprise:
Step 201, acquisition Received signal strength;
In the present embodiment, receiver can be intercepted on channel predetermined and receive Received signal strength, or, after receiver can receive broadcast singal, obtain Received signal strength through resolving.
For example, this Received signal strength can be analog if signal.
Step 202, by this Received signal strength by analog to digital converter, obtain digital signal.
For example, by analog if signal by analog to digital converter, obtain digital medium-frequency signal.
Step 203, by this digital signal by low-converter, obtain baseband signal.
For example, the center frequency point of signal spectrum can be transformed into 0Hz from non-zero Hz by lower frequency device.
Fig. 4 is the structural representation that the present invention improves the lower frequency device of method one embodiment of receiver sensitivity, as shown in Figure 4, this digital signal is digital medium-frequency signal, this digital medium-frequency signal is divided into two-way, lead up to Cos (wt) multiplier, namely the cosine signal of oscillator output IF-FRE obtains mutually multiplied baseband I road signal, separately lead up to Sin (wt) multiplier, namely oscillator exports IF-FRE after 90 degree phase shifts, obtains sinusoidal signal and to be multiplied acquisition base band Q road signal.
Step 204, by baseband signal by band outer interference eliminator, obtain be with outer denoised signal.
In the present embodiment, by baseband signal by the outer interference eliminator of band, two frequency-doubled signals of the digital medium-frequency signal produced in the process by low-converter can be removed, and the outer interference of other band that may exist.
For example, the outer interference eliminator of the band in the present embodiment can be low pass filter.
Step 205, will be with outer denoised signal by band in interference eliminator.
Concrete, in-band noise controller, according to signal quality, is with interior interference cancellation operation to the outer denoised signal of band.
In the present embodiment, this signal quality can be through multiple Received signal strength, be alternatively, outer denoised signal is with to carry out adding up and obtain with calculating, that is, sample multiple Received signal strength carry out calculating from convergence obtaining, or this signal quality also can be that those skilled in the art rule of thumb set.
Concrete, the in-band noise controller in receiver is according to signal quality, and in control cincture, noise eliminator carries out being with interior interference cancellation operation to received signal.
Step 206, turn frequency-domain operations by by the signal of interference cancellation operation in band by time domain, obtain frequency-region signal.
For example, first carry out getting phase operation by by the signal of interference cancellation operation in band, then, carry out difference operation, that is, the phase place of current demand signal is deducted the phase place of preceding signal, obtaining differential phase, is exactly frequency-region signal.
Step 207, by frequency-region signal by signal quality estimator, obtain signal quality.
In the present embodiment, be that SNR estimator is set forth with quality estimator, but be not that SNR estimator is limited with signal quality estimator.
Step 208, signal quality is transferred to operation control in band, carries out being with interior denoising to operate to make in this band noise eliminator in operation control control cincture.
It should be noted that, the signal quality of the present embodiment can be signal to noise ratio, but is not limited successively, and in the embodiment of the present invention, signal quality can be the parameter of any description signal quality.
Step 207, according to signal quality, to received signal noise Processing for removing is carried out to noise eliminator in control cincture.
The implementation of the present embodiment at least comprises following two kinds:
The first implementation, if determine, described signal quality is greater than first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate delay disposal to described Received signal strength; Or, if determine, described signal quality is less than or equal to described first threshold, then controlling described in-band noise arrester adopts the second tupe in described tupe to be with interior interference to eliminate through checking to described Received signal strength, and the receiving sensitivity that new departure that the present invention proposes can improve FM receiver is about 2.5dB.
The second implementation, if determine, described signal quality is within the scope of first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or described signal quality is within the scope of Second Threshold if determine, then controls described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
In the present embodiment, achieve the white Gaussian noise eliminated in Received signal strength, and then improve the sensitivity of receiver.
It should be noted that, the tupe in the present embodiment at least comprises: delay disposal and filtering process.Fig. 5 is the design sketch that the present invention improves receiver sensitivity method one embodiment, as shown in Figure 5, for the design sketch of the raising receiver sensitivity method that uses the present invention to propose in FM receiver, wherein abscissa is actual system signal noise ratio, and the longitudinal axis is the frequency domain signal to noise ratio estimated.According to the display of Fig. 5, the frequency domain signal to noise ratio fluctuation of the present embodiment process is less, comparatively accurately.
Fig. 6 is the structural representation that the present invention improves device one embodiment of receiver sensitivity, as shown in Figure 6, and the device of this raising receiver sensitivity, comprise: acquisition module 61 and in-band noise processing module 62, wherein, acquisition module 61, for obtaining Received signal strength; In-band noise processing module 62, for the signal quality according to described Received signal strength, is with interior interference cancellation operation to described Received signal strength.
In the present embodiment, by obtaining Received signal strength, then, according to the signal quality of Received signal strength, carrying out to received signal being with interior interference cancellation operation, thus effectively can remove the white Gaussian noise in Received signal strength, and then improve the sensitivity of receiver.
Fig. 7 is the structural representation that the present invention improves another embodiment of device of receiver sensitivity, and as shown in Figure 7, on the basis of above-described embodiment, this in-band noise Processing for removing module 62, comprising: in-band noise controller 621 and in-band noise arrester 622;
Described in-band noise controller 621, for described signal quality and threshold value being compared, determines the tupe eliminated with interior interference described Received signal strength;
Described in-band noise arrester 622, for according to described tupe, is with interior interference cancellation operation to described Received signal strength.
Optionally, in-band noise controller 622, if specifically for determining that described signal quality is greater than first threshold, then in control cincture, noise eliminator 621 adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or described signal quality is less than or equal to described first threshold if determine, then controls described in-band noise arrester 621 and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
Optionally, in-band noise controls arrester 622, if specifically for determining that described signal quality is within the scope of first threshold, then in control cincture, noise eliminator 621 adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or described signal quality is within the scope of Second Threshold if determine, then controls described in-band noise arrester 621 and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
On the basis of above-described embodiment, tupe at least comprises: delay disposal and filtering process.
In the present embodiment, effectively can remove the white Gaussian noise in Received signal strength, and then improve the sensitivity of receiver.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. improve a method for receiver sensitivity, it is characterized in that, comprising:
Obtain Received signal strength;
According to the signal quality of described Received signal strength, interior interference cancellation operation is with to described Received signal strength.
2. method according to claim 1, is characterized in that, the described signal quality according to described Received signal strength, is with interior interference cancellation operation, comprises described Received signal strength:
Described signal quality and threshold value are compared, determines the tupe that described Received signal strength is eliminated with interior interference;
According to described tupe, interior interference cancellation operation is with to described Received signal strength.
3. method according to claim 2, is characterized in that, describedly described signal quality and threshold value is compared, and determines the tupe eliminated with interior interference described Received signal strength, comprising:
If determine, described signal quality is greater than first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or
If determine, described signal quality is less than or equal to described first threshold, then control described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
4. method according to claim 2, is characterized in that, describedly described signal quality and threshold value is compared, and determines the tupe eliminated with interior interference described Received signal strength, comprising:
If determine, described signal quality is within the scope of first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or
If determine, described signal quality is within the scope of Second Threshold, then control described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
5. the method according to claim 3 or 4, is characterized in that, described tupe at least comprises: delay disposal and filtering process.
6. improve a device for receiver sensitivity, it is characterized in that, comprising:
Acquisition module, for obtaining Received signal strength;
In-band noise processing module, for the signal quality according to described Received signal strength, is with interior interference cancellation operation to described Received signal strength.
7. device according to claim 6, is characterized in that, also comprises: described in-band noise Processing for removing module, comprising: in-band noise controller and in-band noise arrester;
Described in-band noise controller, for described signal quality and threshold value being compared, determines the tupe eliminated with interior interference described Received signal strength;
Described in-band noise arrester, for according to described tupe, is with interior interference cancellation operation to described Received signal strength.
8. device according to claim 7, it is characterized in that, described in-band noise controller, if specifically for determining that described signal quality is greater than first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or described signal quality is less than or equal to described first threshold if determine, then controls described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
9. device according to claim 7, it is characterized in that, described in-band noise controls arrester, if specifically for determining that described signal quality is within the scope of first threshold, then in control cincture, noise eliminator adopts the first tupe in described tupe to be with interior interference to eliminate to described Received signal strength; Or described signal quality is within the scope of Second Threshold if determine, then controls described in-band noise arrester and adopt the second tupe in described tupe to be with interior interference to eliminate to described Received signal strength.
10. device according to claim 9, is characterized in that, described tupe at least comprises: delay disposal and filtering process.
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| CN201410826933.6A CN104617965B (en) | 2014-12-25 | 2014-12-25 | Improve the method and device of receiver sensitivity |
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| US7508778B2 (en) * | 2001-12-05 | 2009-03-24 | Qualcomm, Incorporated | System and method for adjusting quality of service in a communication system |
| CN101777874A (en) * | 2009-01-13 | 2010-07-14 | 联发科技股份有限公司 | Method for performing active jammer suppression on electronic device, and associated apparatus |
| CN102195660A (en) * | 2010-02-26 | 2011-09-21 | 英特赛尔美国股份有限公司 | Cascaded filter based noise and interference canceller |
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Effective date of registration: 20190410 Address after: 266100 No. 1, Keyuan Wei Road, Laoshan District, Qingdao City, Shandong Province Patentee after: Datang Semiconductor Technology Co., Ltd. Address before: 100094 No. 6 Yongjia North Road, Beijing, Haidian District Patentee before: Datang Semiconductor Design Co., Ltd. |
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Application publication date: 20150513 Assignee: Meitang Zhilian Health Technology (Jiangsu) Co., Ltd Assignor: Datang Semiconductor Technology Co.,Ltd. Contract record no.: X2020990000495 Denomination of invention: Methods and devices for improving receiver sensitivity Granted publication date: 20170627 License type: Common License Record date: 20200916 |
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