CN103036507B - Down conversion method and the system of Frequency mixing processing is suppressed based on mirror image - Google Patents
Down conversion method and the system of Frequency mixing processing is suppressed based on mirror image Download PDFInfo
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- CN103036507B CN103036507B CN201210529750.9A CN201210529750A CN103036507B CN 103036507 B CN103036507 B CN 103036507B CN 201210529750 A CN201210529750 A CN 201210529750A CN 103036507 B CN103036507 B CN 103036507B
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Abstract
The invention discloses a kind of down conversion method and the system that suppress Frequency mixing processing based on mirror image, the method is by carrying out segmentation to the signal in frequency range, then enlarge leadingly process, tracking filter process and mirror image are carried out respectively successively to each segment signal and suppress Frequency mixing processing, obtain down-conversion signal, this system comprises: switch put by hilted broadsword more, preamplifier, track filter and image-reject mixer.Method of the present invention is simple, circuit low in energy consumption, and system bulk is little, can be obtained the signal of the down-conversion of relative broad range by process of the present invention, can meet the demand of user to different frequency range.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of down conversion method and the system that suppress Frequency mixing processing based on mirror image.
Background technology
Along with the application of wireless technology and universal, the application that broadband test is measured is also more and more extensive, frequency microwave testing equipment under traditional PXI framework mostly is arrowband, broadband test in 26.5GHz band limits adopts YTF filtering mode, but its volume is large, and power consumption is high, limit the raising of PXI rf signal analysis performance.
Summary of the invention
In view of above-mentioned analysis, the present invention aims to provide a kind of down conversion method and the system that suppress Frequency mixing processing based on mirror image, in order to solve the problem.
Object of the present invention is mainly achieved through the following technical solutions:
Suppress a down conversion method for Frequency mixing processing based on mirror image, comprising:
The broadband signal received is divided into multistage, and carries out enlarge leadingly process for each segment signal;
And then the signal after amplifying process is carried out tracking filter process;
Finally carry out mirror image and suppress Frequency mixing processing, obtain down-conversion signal.
Preferably, described broadband signal is 9KHz-26.5GHz.
Preferably, before the broadband signal received is divided into multi-segment signal, comprise further;
The broadband signal received first is divided into two sections, more respectively above-mentioned two segment signals is carried out signal attenuation process.
Preferably, described broadband signal is divided into 5 sections according to the accessible signal frequency range of image-reject mixer.
Preferably, described down-conversion signal is the frequency signal of 500MHz-4GHz.
The embodiment of the present invention additionally provides a kind of down conversion system suppressing Frequency mixing processing based on mirror image, comprising:
Switch put by hilted broadsword more, for the broadband signal received is divided into multistage;
Preamplifier, carries out enlarge leadingly process for each segment signal after described hilted broadsword being put more to switch division;
Track filter, for carrying out tracking filter process by the signal after enlarge leadingly process;
Image-reject mixer, suppresses Frequency mixing processing for carrying out mirror image to the signal after tracking filter, obtains down-conversion signal.
Preferably, described broadband signal is 9KHz-26.5GHz.
Preferably, also comprise: hilted broadsword put more switch also for, formerly described broadband signal is divided into two sections, and then is divided into multistage by these two sections;
Attenuator, two segment signals separated for putting switch to described hilted broadsword carry out signal attenuation process more.
Preferably, described broadband signal is divided into 5 sections according to the accessible signal frequency range of image-reject mixer.
Preferably, the frequency of described down-conversion signal is 500MHz-4GHz.
Beneficial effect of the present invention is as follows:
A kind of down conversion method and system suppressing Frequency mixing processing based on mirror image provided by the invention, by carrying out segmentation to the signal in frequency range, then enlarge leadingly process, tracking filter process and mirror image are carried out respectively successively to each segment signal and suppress Frequency mixing processing, obtain down-conversion signal, the method of the embodiment of the present invention is simple, circuit low in energy consumption, and the signal of the down-conversion of relative broad range can be obtained by method process of the present invention, the demand of user to different frequency range can be met.
Other features and advantages of the present invention will be set forth in the following description, and, becoming apparent from specification of part, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Fig. 1 is the flow chart suppressing the down conversion method of Frequency mixing processing based on mirror image of the embodiment of the present invention 1;
Fig. 2 is the down conversion system schematic diagram suppressing Frequency mixing processing based on mirror image of the embodiment of the present invention 2.
Embodiment
Specifically describe the preferred embodiments of the present invention below in conjunction with accompanying drawing, wherein, accompanying drawing forms the application's part, and together with embodiments of the present invention for explaining principle of the present invention.For purpose of clarity and simplification, when it may make theme of the present invention smudgy, illustrating in detail of known function and structure in device described herein will be omitted.
Embodiment 1
Embodiments provide a kind of down conversion method suppressing Frequency mixing processing based on mirror image, see Fig. 1, the method comprises:
S101, the broadband signal received first is divided into two sections;
Described broadband signal in the embodiment of the present invention is 9KHz-26.5GHz, think that the frequency of below 4GHz can carry out down-converted separately, described the present embodiment only considers the frequency of more than 4GHz, at 11.6GHz place, above-mentioned broadband signal being divided into two sections, is 4GHz-11.6GHz and 11.6GHz-26.5GHz respectively;
S102, respectively signal attenuation process is carried out to above-mentioned two segment signals; When signal is very strong, attenuation processing is carried out to signal, to protect late-class circuit.
S103, by decay after above-mentioned two segment signals be further subdivided into multistage;
As the preferred embodiment of the embodiment of the present invention, described broadband signal is divided into 5 sections, if by very few for broadband signal calibration hop count, so the bandwidth of each section will be too large, after being unfavorable for, signal is processed, if but bandwidth is divided too thin, circuit design unit certainly will be increased, thus increase the volume of whole system.
Wherein, the signal of 4GHz-11.6GHz section is further divided into 4GHz-7.8GHz and 7.8GHz-11.6GHz;
The signal of 11.6GHz-26.5GHz section is further divided into 11.6GHz-15.4GHz, 15.4GHz-19.2GHz and 19.2GHz-26.5GHz.
Above-mentioned frequency range is relevant with the model of tracking filter with division, and namely above-mentioned each frequency range is the model of corresponding tracking filter.
The embodiment of the present invention carries out segmentation to the received signal according to the scope of the accessible signal of tracking filter.
S104, respectively enlarge leadingly process is carried out to each segment signal;
Being amplified by gain makes signal obtain suitable amplification.
S105, by carry out amplify process after signal carry out tracking filter process again;
S106, the signal after filtering process carried out to mirror image again and suppress Frequency mixing processing, obtain down-conversion signal.
The frequency range of the described down-conversion signal wherein obtained is 500MHz-4GHz.
A kind of down conversion method suppressing Frequency mixing processing based on mirror image that the embodiment of the present invention provides, by carrying out segmentation to the signal in frequency range, then enlarge leadingly process, tracking filter process and mirror image are carried out respectively successively to each segment signal and suppress Frequency mixing processing, obtain down-conversion signal, the method of the embodiment of the present invention is simple, circuit low in energy consumption, and the signal of the down-conversion of relative broad range can be obtained by method process of the present invention, the demand of user to different frequency range can be met.
Embodiment 2
Embodiments provide a kind of down conversion system suppressing Frequency mixing processing based on mirror image, see Fig. 2, this system comprises:
Switch 21 put by hilted broadsword more, for the broadband signal received is divided into multistage;
Wherein, described broadband signal is 9KHz-26.5GHz, and described broadband signal is divided into 5 sections.If by very few for broadband signal calibration hop count, so the bandwidth of each section will be too large, processes being unfavorable for after to signal, but if bandwidth is divided too thin, circuit design unit certainly will be increased, thus the volume of increase whole system.
Wherein, the signal of 4GHz-11.6GHz section is further divided into 4GHz-7.8GHz and 7.8GHz-11.6GHz;
The signal of 11.6GHz-26.5GHz section is further divided into 11.6GHz-15.4GHz, 15.4GHz-19.2GHz and 19.2GHz-26.5GHz.
Attenuator 22, for after the broadband signal of reception is divided into two sections, carries out signal attenuation process to above-mentioned two segment signals respectively.
Preamplifier 23, for carrying out enlarge leadingly process to each segment signal;
Tracking filter 24, for carrying out tracking filter process by the signal after enlarge leadingly process;
Image-reject mixer 25, suppress Frequency mixing processing for carrying out mirror image to the signal after tracking filter, obtain down-conversion signal, the frequency of the described down-conversion signal obtained is 500MHz-4GHz.
A kind of down conversion system suppressing Frequency mixing processing based on mirror image that the embodiment of the present invention provides, put switch by hilted broadsword more and signal is divided into multistage, then by attenuator, preamplifier and tracking filter, enlarge leadingly process, tracking filter process and mirror image are carried out respectively to each segment signal and suppress Frequency mixing processing, obtain down-conversion signal, the system configuration of the embodiment of the present invention is simple, overall volume is little, circuit low in energy consumption, and the signal of the down-conversion of relative broad range after logical native system process, can be obtained, the demand of user to different frequency range can be met.
In sum, embodiments provide a kind of down conversion method and the system that suppress Frequency mixing processing based on mirror image, by carrying out segmentation to the signal in frequency range, then enlarge leadingly process, tracking filter process and mirror image are carried out respectively successively to each segment signal and suppress Frequency mixing processing, obtain down-conversion signal, the method of the embodiment of the present invention is simple, circuit low in energy consumption, and the signal of the down-conversion of relative broad range can be obtained by method process of the present invention, the demand of user to different frequency range can be met.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (2)
1. suppress a down conversion method for Frequency mixing processing based on mirror image, it is characterized in that, comprising:
The broadband signal received is divided into multistage, and carries out enlarge leadingly process for each segment signal;
And then the signal after amplifying process is carried out tracking filter process;
Finally carry out mirror image and suppress Frequency mixing processing, obtain down-conversion signal;
Described broadband signal is 9KHz-26.5GHz;
Before the broadband signal received is divided into multi-segment signal, comprise further;
The broadband signal received first is divided into two sections, more respectively above-mentioned two segment signals is carried out signal attenuation process;
Described broadband signal is divided into 5 sections according to the accessible signal frequency range of image-reject mixer;
Described down-conversion signal is the frequency signal of 500MHz-4GHz.
2. suppress a down conversion system for Frequency mixing processing based on mirror image, it is characterized in that, comprising:
Switch put by hilted broadsword more, for the broadband signal received is divided into multistage;
Preamplifier, carries out enlarge leadingly process for each segment signal after described hilted broadsword being put more to switch division;
Tracking filter, for carrying out tracking filter process by the signal after enlarge leadingly process;
Image-reject mixer, suppresses Frequency mixing processing for carrying out mirror image to the signal after tracking filter, obtains down-conversion signal;
Described broadband signal is 9KHz-26.5GHz, and the frequency of described down-conversion signal is 500MHz-4GHz;
Hilted broadsword put more switch also for, formerly described broadband signal is divided into two sections, and then is divided into multistage by these two sections;
Attenuator, two segment signals separated for putting switch to described hilted broadsword carry out signal attenuation process more;
Described broadband signal is divided into 5 sections according to the accessible signal frequency range of image-reject mixer.
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| CN201210529750.9A CN103036507B (en) | 2012-12-10 | 2012-12-10 | Down conversion method and the system of Frequency mixing processing is suppressed based on mirror image |
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| CN104459317B (en) * | 2013-09-17 | 2019-09-17 | 苏州普源精电科技有限公司 | A kind of spectrum analyzer that can inhibit image frequency |
| CN105629226A (en) * | 2015-12-19 | 2016-06-01 | 潘小胜 | Novel and high-efficiency explosion-proof device for electronic explosive |
| CN108337204B (en) * | 2017-12-26 | 2020-12-25 | 北京航天测控技术有限公司 | Miniaturized broadband vector signal up-conversion circuit |
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| CN1866754A (en) * | 2005-05-17 | 2006-11-22 | 松下电器产业株式会社 | Receiver IF system having image rejection mixer and band-pass filter |
| CN102004242A (en) * | 2010-09-30 | 2011-04-06 | 中国船舶重工集团公司第七二三研究所 | Low-stray low-harmonic and high-dynamic signal generation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866754A (en) * | 2005-05-17 | 2006-11-22 | 松下电器产业株式会社 | Receiver IF system having image rejection mixer and band-pass filter |
| CN102004242A (en) * | 2010-09-30 | 2011-04-06 | 中国船舶重工集团公司第七二三研究所 | Low-stray low-harmonic and high-dynamic signal generation method |
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| Title |
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| A 900 Dual-conversion Low-IF GSM Receiver in 0.35-um CMOS;Shahrzad Tadjpour et al;《IEEE JOURNAL OF SOLID-STATE CIRCUITS》;20011231;第36卷(第12期);第1992-2002页 * |
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