CN202268986U - Multi-standard channel multiplexing circuit - Google Patents
Multi-standard channel multiplexing circuit Download PDFInfo
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- CN202268986U CN202268986U CN201120152629XU CN201120152629U CN202268986U CN 202268986 U CN202268986 U CN 202268986U CN 201120152629X U CN201120152629X U CN 201120152629XU CN 201120152629 U CN201120152629 U CN 201120152629U CN 202268986 U CN202268986 U CN 202268986U
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- low noise
- noise amplifier
- passage
- signal
- selector switch
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Abstract
The utility model provides a multi-standard channel multiplexing circuit. The multi-standard channel multiplexing circuit comprises an antenna port, a channel selection device, an uplink signal channel, and a low-noise amplifying circuit, a first selection switch and a frequency conversion processing multiplexing circuit of a monitoring channel with at least two standards. Wireless signals are input into the channel selection device via the multiplexed antenna port, after being separated, the wireless signals are output to the corresponding uplink channel or the low-noise amplifying circuit of the monitoring channel of a certain standard, and after being processed by the low-noise amplifying circuit, the wireless signals are selected by the selection switch to enter into the frequency conversion processing multiplexing circuit, wherein all the uplink signals and monitoring signals are processed with frequency conversion in the same frequency conversion processing multiplexing circuit so as to obtain digital signals, and the digital signals are output to a post-stage digital processing unit. With the technology of the multi-standard channel multiplexing circuit, a multi-channel circuit is multiplexed, so that complexity of the circuit is reduced, reliability of equipment is improved greatly, amount of used elements is reduced, volume of equipment is reduced, and cost is decreased.
Description
Technical field
The utility model relates to wireless network and intercepts circuit, particularly a kind of multi-modulation scheme channel multiplexing circuit.
Background technology
At present; Along with development of Communication Technique; The wireless signal that different systems such as 2G, 3G, different frequency range are all arranged in the same band of position usually; Novel base station system requires to realize that the wireless signal to the various standards of current region scans intercepts, and parses the information such as pilot power, sub-district ID of adjacent sub-district, and the intelligent updating cell list.Network intercepting can make the data of base station according to network intercepting, carries out distributing rationally of this base station cell, prevents presence of intercell interference; Simultaneously also can be in the base station busy or signal strength signal intensity when dying down, instruct UE to realize the switching of minizone.Realize this function, traditional way is to adopt the different circuits path to intercept to the different systems wireless signal.Though can realize the function that the base station requires like this; But the component number of circuit is many, and circuit is comparatively complicated, and reliability is on the low side; The volume of equipment is bigger than normal simultaneously; Cost is also higher relatively, particularly for this little and low equipment of cost of cube of wanting of Home eNodeB, in use has bigger defective.
The utility model content
In order to address the above problem, the utility model provides a kind of multi-modulation scheme channel multiplexing circuit.
A kind of multi-modulation scheme channel multiplexing circuit; Comprise: antenna port; The channel selection device that is connected with said antenna port; The low noise amplifier circuit that is connected with said channel selection device, first selector switch that is connected with said low noise amplifier circuit, the frequency-conversion processing multiplex circuit that is connected with said first selector switch;
Said low noise amplifier circuit comprises the low noise amplifier circuit of a upward signal passage and the low noise amplifier circuit that at least two kinds of standards are intercepted passage;
Wireless signal is transported to said channel selection device by antenna port;
Said channel selection device will separate from the said wireless signal of said antenna port input, obtains upward signal and exports the low noise amplifier circuit of said upward signal passage to or obtain intercepting signal and export said low noise amplifier circuit of intercepting passage to;
Said low noise amplifier circuit is exported said first selector switch then to from the said upward signal of said channel selection device input or intercept signal and carry out the low noise processing and amplifying;
Said first selector switch select with the low noise amplifier circuit of said upward signal passage or said intercept passage the low noise amplifier circuit input said upward signal or intercept signal and export said frequency-conversion processing multiplex circuit to;
Said frequency-conversion processing multiplex circuit will or be intercepted signal and carry out frequency-conversion processing and obtain digital signal and export back stages of digital processing unit to by the said upward signal of first selector switch input;
Said channel selection device and said first selector switch are switched to the low noise amplifier circuit of said upward signal passage or synchronously with a kind of said low noise amplifier circuit of intercepting passage of standard.
Compared with prior art; The technical scheme of the utility model; Wireless signal is by multiplexing antenna port input channel choice device; Through exporting the low noise amplifier of intercepting passage of corresponding upward signal passage or certain standard after separating to; Handle the back and select to get into the frequency-conversion processing multiplex circuit through amplifying low noise amplifier by selector switch, all upward signals with intercept signal and carry out frequency-conversion processing at same frequency-conversion processing multiplex circuit, obtain digital signal and export back stages of digital processing unit to.
Pass through foregoing circuit; Need not to receive the wireless signal of different systems, also need not simultaneously the signal of different systems to be carried out frequency-conversion processing respectively, the complexity of circuit is reduced by different frequency-variable modules by the different antennae port; Improved the reliability of equipment; Reduce the usage quantity of components and parts, reduced the volume of equipment, reduced the cost of equipment.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model embodiment;
Fig. 2 to Fig. 5 is the electrical block diagram of the utility model application example.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is elaborated.
See also Fig. 1, Fig. 1 is the electrical block diagram of the utility model embodiment.Comprise: antenna port, the channel selection device that is connected with antenna port, the low noise amplifier circuit that is connected with channel selection device, first selector switch that is connected with low noise amplifier circuit, the frequency-conversion processing multiplex circuit that is connected with first selector switch; Low noise amplifier circuit specifically comprises the low noise amplifier circuit of a upward signal passage and the low noise amplifier circuit of intercepting passage of at least two kinds of standards.
Its operation principle is: channel selection device will separate from the wireless signal of antenna port input, obtains upward signal and exports the low noise amplifier circuit of upward signal passage to or obtain intercepting signal and export the low noise amplifier circuit of intercepting passage to; Low noise amplifier circuit is exported said first selector switch then to from the upward signal of said channel selection device input or intercept signal and carry out the low noise processing and amplifying; First selector switch select with the low noise amplifier circuit of upward signal passage or said intercept passage the low noise amplifier input upward signal or intercept signal and export the frequency-conversion processing multiplex circuit to; The frequency-conversion processing multiplex circuit will or be intercepted signal and carry out frequency-conversion processing and obtain digital signal and export back stages of digital processing unit to by the upward signal of first selector switch input.
Wherein, the channel selection device and first selector switch are switched to the low noise amplifier circuit of upward signal passage or synchronously with a kind of low noise amplifier circuit of intercepting passage of standard.
In order more clearly to set forth the technical scheme of the utility model, describe in further detail to application example shown in Figure 5 circuit the utility model below in conjunction with Fig. 2.
For the frequency-conversion processing multiplex circuit, preferably, comprising: the frequency mixer, low pass filter, the analog to digital converter that connect successively; And the local oscillation circuit that is connected with above-mentioned frequency mixer; Wherein, frequency mixer connects first selector switch, and analog to digital converter connects back stages of digital processing unit.
Its operation principle is: frequency mixer, low pass filter and analog to digital converter will or intercept respectively that signal carries out down-converted, low pass filtered involves analog-to-digital conversion from the upward signal of first selector switch input, and wherein, local oscillation circuit output local oscillation signal is to frequency mixer.
Further, the frequency-conversion processing multiplex circuit also comprises the variable gain amplifier that is connected between low pass filter and the analog to digital converter, and this variable gain amplifier can be adjusted upward signal or intercept the power of signal.
Low noise amplifier circuit and the low noise amplifier circuit of intercepting passage for the upward signal passage; Preferably; Include the low noise amplifier of corresponding standard; This low noise amplifier is mainly used in the upward signal of channel selection device input or intercepts signal and carry out exporting said first selector switch to after the low noise processing and amplifying.
Further; The low noise amplifier circuit of upward signal passage and the low noise amplifier circuit of intercepting passage also comprise the adjustable attenuator that is connected between the low noise amplifier and first selector switch; This adjustable attenuator is with upward signal or intercept signal and carry out power attenuation and handle, and exports first selector switch then to.
Further; The low noise amplifier circuit of upward signal passage and the low noise amplifier circuit of intercepting passage all also comprise first filter that is connected between the adjustable attenuator and first selector switch; This first filter is mainly used in upward signal or intercepts signal and carry out Filtering Processing, exports first selector switch then to.
See also Fig. 2, Fig. 2 is an application example electrical block diagram of the utility model.
To intercept passage with first standard be identical standard to the upward signal passage in this circuit.
For channel selection device; Particularly; Comprise: second selector switch that is connected with antenna port; Be connected the duplexer between the low noise amplifier of second selector switch and upward signal passage, be connected second selector switch and intercept second filter (comprising n kind standard, n >=2) between the low noise amplifier of passage.
Its operation principle is: wireless signal is transported to second selector switch by antenna port, and second selector switch has two kinds of situation to the processing of wireless signal, promptly selects to be switched to the duplexer or second filter.
When being switched to duplexer, duplexer separates wireless signal and obtains the low noise amplifier that upward signal exports the upward signal passage to; When being switched to second filter, second filter separates the low noise amplifier of intercepting passage that signal exports corresponding standard to of intercepting that obtains corresponding standard to wireless signal.
For the circuit in the present embodiment; Particularly, the upward signal passage that has connected and composed successively by antenna port, second selector switch, duplexer, low noise amplifier, adjustable attenuator, upstream filter (first filter), first selector switch, frequency mixer, low pass filter, variable gain amplifier, local oscillation circuit and analog to digital converter; Connected and composed the passage of intercepting of first standard to the n standard successively by antenna port, second selector switch, second filter, low noise amplifier, adjustable attenuator, first filter, first selector switch, frequency mixer, low pass filter, variable gain amplifier, local oscillation circuit and analog to digital converter.
When being operated in the upward signal passage, wireless signal is transported to second selector switch by antenna port, and second selector switch is switched to duplexer (end also connects the downstream signal passage); Through diplexer separates; Obtain upward signal and enter into low noise amplifier, through entering into adjustable attenuator after the low noise processing and amplifying, according to the size of signal strength signal intensity; Can select decay or inoperation; The upward signal of process amplitude adjustment is sent to upstream filter and carries out filtering, exports first selector switch to through filtered upward signal, and first selector switch selects to be communicated to frequency mixer; The local oscillation signal that this moment, local oscillation circuit exported frequency mixer to is the required local frequency of upward signal passage frequency-conversion processing; Upward signal through behind the frequency mixer is downconverted into intermediate frequency or zero intermediate frequency signals, is sent to analog to digital converter through low pass filter filtering, variable gain amplifier after amplifying, and converts digital signal then to and exports back stages of digital processing unit to.
In like manner; When be operated in corresponding first standard to the n standard intercept passage the time; Wireless signal is received by antenna end and exports second selector switch to, and second selector switch is switched to second filter, after separating through second filter; Signal enters into low noise amplifier, adjustable attenuator, first filter, first selector switch; Selection is switched to frequency mixer, the local oscillation signal that this moment, local oscillation circuit exported frequency mixer to be corresponding first standard to the n standard intercept the required local frequency of passage frequency-conversion processing, through low pass filter filtering; Variable gain amplifier is sent to analog to digital converter after amplifying, and converts digital signal then to and exports back stages of digital processing unit processes to.
See also Fig. 3, Fig. 3 is the Another application example circuit structural representation of the utility model.In the present embodiment; For channel selection device, particularly, comprising: second selector switch that is connected with antenna port; The duplexer that is connected with the low noise amplifier of second selector switch and upward signal passage; Connect the duplexer and first standard and intercept the 3rd selector switch between the low noise amplifier of passage, be connected second selector switch and intercept second filter (comprising n kind standard, n >=2) between the low noise amplifier of intercepting passage of all the other each standards the passage except that first standard;
Its operation principle is: wireless signal is transported to second selector switch by antenna port, and second selector switch has two kinds of situation to the processing of wireless signal, promptly selects to be switched to the duplexer or second filter.
When second selector switch is selected to be switched to duplexer; Duplexer separates wireless signal and obtains the low noise amplifier that upward signal exports the upward signal passage to; Perhaps obtain first standard and intercept signal and export the 3rd selector switch to, the 3rd selector switch is selected first standard to intercept signal and is exported the low noise amplifier of intercepting passage to.
When second selector switch was selected to be switched to second filter, second filter separated the signal of intercepting that obtains corresponding second standard to the n standard to wireless signal and exports the low noise amplifier of intercepting passage to.
Wherein, the upward signal passage and first standard are intercepted passage through after the diplexer separates, are selected to be operated in the passage of intercepting of the first standard down going channel or first standard again by the 3rd selector switch.
Further feature in the present embodiment is same as the previously described embodiments, repeats no more at this.
See also Fig. 4, Fig. 4 is another application example electrical block diagram of the utility model.In the present embodiment,, particularly, comprising: first antenna port and second antenna port for antenna port; For channel selection device; Particularly; Comprise: be connected the duplexer between the low noise amplifier of first antenna port and upward signal passage; Second selector switch that is connected with second antenna port is connected second selector switch and connects and intercept second filter between the low noise amplifier of passage.
Its operation principle is: wireless signal is transported to the duplexer and second selector switch respectively by first antenna port and second antenna port.
Duplexer separates wireless signal and obtains the low noise amplifier that upward signal exports the upward signal passage to.
Second selector switch is selected to be switched to second filter, and second filter separates the signal of intercepting that obtains corresponding first standard to the n standard to wireless signal and exports the low noise amplifier of intercepting passage to.
Further feature in the present embodiment is same as the previously described embodiments, repeats no more at this.
See also Fig. 5, Fig. 5 is another application example electrical block diagram of the utility model.In the present embodiment,, particularly, comprising: first antenna port and second antenna port for antenna port; For channel selection device, particularly, comprising: be connected the duplexer between the low noise amplifier of first antenna port and upward signal passage, be connected second antenna port and intercept the multiplexer between the low noise amplifier of passage.
Its operation principle is: wireless signal is transported to duplexer and multiplexer respectively by first antenna port and second antenna port.
Duplexer separates wireless signal and obtains the low noise amplifier that upward signal exports the upward signal passage to.
Multiplexer separates the signal of intercepting that obtains corresponding first standard to the n standard to wireless signal and exports the low noise amplifier of intercepting passage to.
Further feature in the present embodiment is same as the previously described embodiments, repeats no more at this.
Above-described the utility model execution mode does not constitute the qualification to the utility model protection range.The modification of being done within any spirit and principle at the utility model, be equal to replacement and improvement etc., all should be included within the claim protection range of the utility model.
Claims (10)
1. multi-modulation scheme channel multiplexing circuit; It is characterized in that; Comprise: antenna port, the channel selection device that is connected with said antenna port, the low noise amplifier circuit that is connected with said channel selection device; First selector switch that is connected with said low noise amplifier circuit, the frequency-conversion processing multiplex circuit that is connected with said first selector switch;
Said low noise amplifier circuit comprises the low noise amplifier circuit of a upward signal passage and the low noise amplifier circuit that at least two kinds of standards are intercepted passage;
Wireless signal is transported to said channel selection device by antenna port;
Said channel selection device will separate from the said wireless signal of said antenna port input, obtains upward signal and exports the low noise amplifier circuit of said upward signal passage to or obtain intercepting signal and export said low noise amplifier circuit of intercepting passage to;
Said low noise amplifier circuit is exported said first selector switch then to from the said upward signal of said channel selection device input or intercept signal and carry out the low noise processing and amplifying;
Said first selector switch select with the low noise amplifier circuit of said upward signal passage or said intercept passage the low noise amplifier circuit input said upward signal or intercept signal and export said frequency-conversion processing multiplex circuit to;
Said frequency-conversion processing multiplex circuit will or be intercepted signal and carry out frequency-conversion processing and obtain digital signal and export back stages of digital processing unit to by the said upward signal of first selector switch input;
Said channel selection device and said first selector switch are switched to the low noise amplifier circuit of said upward signal passage or synchronously with a kind of said low noise amplifier circuit of intercepting passage of standard.
2. multi-modulation scheme channel multiplexing circuit according to claim 1 is characterized in that, said frequency-conversion processing multiplex circuit comprises frequency mixer, low pass filter, the analog to digital converter that connects successively, and the local oscillation circuit that is connected with said frequency mixer;
Said frequency mixer connects first selector switch, and said analog to digital converter connects back stages of digital processing unit;
Said frequency mixer, low pass filter and analog to digital converter will carry out down-converted from the said wireless signal of said first selector switch input respectively, low pass filtered involves analog-to-digital conversion and obtains digital signal;
Said local oscillation circuit output local oscillation signal is to said frequency mixer.
3. multi-modulation scheme channel multiplexing circuit according to claim 2 is characterized in that said frequency-conversion processing multiplex circuit also comprises the variable gain amplifier that is connected between said low pass filter and the analog to digital converter;
The power that said variable gain amplifier is used to adjust said upward signal or intercepts signal.
4. multi-modulation scheme channel multiplexing circuit according to claim 1 is characterized in that, the low noise amplifier circuit of said upward signal passage and said low noise amplifier circuit of intercepting passage include low noise amplifier;
Said low noise amplifier is with the said upward signal of said channel selection device input or intercept signal and carry out exporting said first selector switch to after the low noise processing and amplifying.
5. multi-modulation scheme channel multiplexing circuit according to claim 4; It is characterized in that; The low noise amplifier circuit of said upward signal passage and said low noise amplifier circuit of intercepting passage all further comprise the adjustable attenuator that is connected between said low noise amplifier and said first selector switch;
Said adjustable attenuator carries out said wireless signal to export said first selector switch to after power attenuation is handled.
6. multi-modulation scheme channel multiplexing circuit according to claim 5; It is characterized in that the low noise amplifier circuit of said upward signal passage and said low noise amplifier circuit of intercepting passage all further comprise first filter that is connected between said adjustable attenuator and said first selector switch;
Said first filter is to said upward signal or intercept signal and carry out exporting said first selector switch to after the Filtering Processing.
7. multi-modulation scheme channel multiplexing circuit according to claim 1 is characterized in that said channel selection device comprises:
Second selector switch that is connected with said antenna port; Be connected the duplexer between the low noise amplifier circuit of said second selector switch and said upward signal passage, be connected said second selector switch and intercept second filter between the low noise amplifier circuit of passage;
Said antenna port receives said wireless signal and exports said second selector switch to;
Said second selector switch selects to be switched to said duplexer, and said duplexer separates said wireless signal and obtains the low noise amplifier circuit that upward signal exports said upward signal passage to,
Or
Said second selector switch is selected to be switched to said second filter, and said second filter separates the signal of intercepting that obtains corresponding standard to said wireless signal and exports said low noise amplifier circuit of intercepting passage to.
8. multi-modulation scheme channel multiplexing circuit according to claim 1 is characterized in that said channel selection device comprises:
Second selector switch that is connected with said antenna port; The duplexer that is connected with the low noise amplifier circuit of said second selector switch and said upward signal passage; Connect the said duplexer and first standard and intercept the 3rd selector switch between the low noise amplifier of passage, be connected said second selector switch and intercept second filter between the low noise amplifier circuit of intercepting passage of all the other each standards the passage except that first standard;
Said antenna port receives said wireless signal and exports said second selector switch to;
Said second selector switch selects to be switched to said duplexer; Said duplexer separates said wireless signal and obtains the low noise amplifier circuit that upward signal exports said upward signal passage to; Or obtain first standard and intercept signal and export said the 3rd selector switch to; Said the 3rd selector switch is selected said first standard to intercept signal and is exported the low noise amplifier circuit of intercepting passage to
Or
Said second selector switch is selected to be switched to said second filter, and said second filter separates the signal of intercepting that obtains corresponding first standard to the n standard to said wireless signal and exports the low noise amplifier of intercepting passage to;
It is identical standard that said upward signal passage is intercepted passage with said first standard.
9. multi-modulation scheme channel multiplexing circuit according to claim 1 is characterized in that,
Said antenna port comprises first antenna port and second antenna port;
Said channel selection device comprises: be connected the duplexer between the low noise amplifier circuit of said first antenna port and said upward signal passage; With second selector switch that said second antenna port is connected, be connected that said second selector switch connects and said low noise amplifier circuit of intercepting passage between second filter;
Said first antenna port and second antenna port receive said wireless signal and export said duplexer and said second selector switch respectively to;
Said duplexer separates said wireless signal and obtains the low noise amplifier circuit that upward signal exports said upward signal passage to;
Said second selector switch is selected to be switched to said second filter, and said second filter separates the signal of intercepting that obtains corresponding standard to said wireless signal and exports said low noise amplifier circuit of intercepting passage to.
10. multi-modulation scheme channel multiplexing circuit according to claim 1 is characterized in that,
Said antenna port comprises first antenna port and second antenna port;
Said channel selection device comprises: be connected the duplexer between the low noise amplifier circuit of said first antenna port and said upward signal passage, be connected said second antenna port and said and intercept the multiplexer between the low noise amplifier circuit of passage;
Said first antenna port and second antenna port receive said wireless signal and export said duplexer and said multiplexer respectively to;
Said duplexer separates said wireless signal and obtains the low noise amplifier circuit that upward signal exports said upward signal passage to;
Said multiplexer separates the signal of intercepting that obtains corresponding standard to said wireless signal and exports said low noise amplifier circuit of intercepting passage to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120152629XU CN202268986U (en) | 2011-05-13 | 2011-05-13 | Multi-standard channel multiplexing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120152629XU CN202268986U (en) | 2011-05-13 | 2011-05-13 | Multi-standard channel multiplexing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202268986U true CN202268986U (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120152629XU Expired - Lifetime CN202268986U (en) | 2011-05-13 | 2011-05-13 | Multi-standard channel multiplexing circuit |
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| Country | Link |
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| CN (1) | CN202268986U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291157A (en) * | 2011-05-13 | 2011-12-21 | 京信通信系统（中国）有限公司 | Multi-system channel multiplex circuit |
-
2011
- 2011-05-13 CN CN201120152629XU patent/CN202268986U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291157A (en) * | 2011-05-13 | 2011-12-21 | 京信通信系统（中国）有限公司 | Multi-system channel multiplex circuit |
| CN102291157B (en) * | 2011-05-13 | 2014-01-01 | 京信通信系统（中国）有限公司 | Multi-system channel multiplex circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120606 Effective date of abandoning: 20140101 |
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| RGAV | Abandon patent right to avoid regrant |