CN101510788A - Radio frequency receiving device and method capable of supporting multi-input and multi-output - Google Patents
Radio frequency receiving device and method capable of supporting multi-input and multi-output Download PDFInfo
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- CN101510788A CN101510788A CNA2009100810421A CN200910081042A CN101510788A CN 101510788 A CN101510788 A CN 101510788A CN A2009100810421 A CNA2009100810421 A CN A2009100810421A CN 200910081042 A CN200910081042 A CN 200910081042A CN 101510788 A CN101510788 A CN 101510788A
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Abstract
The invention discloses a radio frequency receiving device that supports multiple inputs and multiple outputs, comprising a radio frequency receiving chip which comprises at least two signal processing modules used for receiving a route of corresponding receiving signals and carrying out down-conversion to obtain a signal after frequency conversion, and a digital baseband chip which comprises an A/D switching module, a baseband and at least two filtering processing modules, wherein, the filtering processing modules are used for receiving a route of the corresponding signal after frequency conversion and carrying out filtering processing to obtain the signal after filtering, the A/D switching module is used for carrying out A/D switching to a route of combined signal obtained by the combination of all routes of signals after filtering, and the baseband is used for separating signals after A/D switching by the A/D switching module in a digital domain to obtain separate signals. In addition, the invention further discloses a radio frequency receiving method. By structural improvement, the device and the method can effectively reduce the device size and save manufacturing cost.
Description
Technical field
The present invention relates to the radio frequency reception technique field of mobile communication, refer in particular to a kind of radio-frequency (RF) Receiving Device and method of supporting multiple-input, multiple-output.
Background technology
Along with the continuous development of mobile communication technology, LTE (Long Term Evolution) is paid close attention to by increasing operator as one of evolution path of mobile wireless technology.As: Britain Waduven, Japanese NTT DoCoMo, U.S. AT﹠amp; The main telecom operators in the world such as T and Verizon, China Mobile have determined to adopt the LTE technology, so the LTE technology is more and more important for the development of future mobile communications.And multiple-input, multiple-output (Multiple-Input Multiple-Out-put, MIMO) transmission has caused that as one of standard of the wireless network evolution of LTE everybody pays close attention to widely and studies.
The MIMO transmission is to increase data transfer rate by send parallel sequence to the user, existing traditional mimo system all uses several antennas at transmitting terminal and receiving terminal, can be under the situation that does not increase bandwidth, improve the capability of communication system and the availability of frequency spectrum exponentially, channel capacity is linear the increase along with the increase of antenna amount, thereby under the situation that does not increase bandwidth and antenna transmission power, can improve the availability of frequency spectrum exponentially.In addition, this MIMO technology not only can improve channel capacity, has also improved the reliability of channel and has reduced the error rate simultaneously.
As shown in Figure 1, the MIMO receiver structure of prior art adopts two or more sets separate antennas 1 to receive usually, adopting two-way or multipath reception passage to carry out radio frequency receives and handles, has an independent receiving chip 100 as the every road of Fig. 1 receive path, each receiving chip 100 comprises a low noise amplifier 2 and a frequency mixer 3, and each receive path respectively has a filter 4 and an A/D converter 5, and the signal of each receive path of process inputs to base band 6 (Baseband) and carries out next step ground processing after radio frequency receives and handles.Yet for the MIMO receiver of said structure, have following limitation and shortcoming:
1. because therefore the passage that the MIMO receiver adopts the individual independently receiving chip of N to receive as the N road makes the receiver volume bigger;
2. because the number of the cost of chip and its nuclear is closely related, the individual independently chip of N increases the manufacturing cost of receiver, simultaneously the inevitable cost that also can increase receiver of the employing of a plurality of AD converter in the multipath reception passage;
3. in addition because the transmission otherness of each radio-frequency channel can cause the different distortions of MIMO signal, can cause signal degradation like this.
Therefore, above-mentioned limitation and the shortcoming development that will certainly influence and restrict the MIMO technology.
Summary of the invention
The purpose of technical solution of the present invention is to provide a kind of radio-frequency (RF) Receiving Device and method of supporting multiple-input, multiple-output, described apparatus and method are passed through architecture advances, can effectively reduce plant bulk, save manufacturing cost, avoid simultaneously because the problem of the distorted signals that the transmission otherness of different radio frequency passage causes.
For achieving the above object, one aspect of the present invention provides a kind of radio-frequency (RF) Receiving Device of supporting multiple-input, multiple-output, described radio-frequency (RF) Receiving Device comprises: radiofrequency receiving chip, described radiofrequency receiving chip comprises at least two signal processing modules, described signal processing module is used for: receive the received signal of one tunnel correspondence and carry out down-conversion, signal after the acquisition frequency conversion; Digital baseband chip, described digital baseband chip comprise A/D modular converter, base band and at least two Filtering Processing modules; Described Filtering Processing module is used for: receive after the described frequency conversion of one tunnel correspondence signal and carry out Filtering Processing, obtain signal after the filtering; Described A/D modular converter is used for: carry out the A/D conversion to be merged into one tunnel combined signal that obtains by signal after the described filtering in each road; Described base band is used for: the signal after numeric field will carry out the A/D conversion through described A/D modular converter separates, and obtains separation signal.
Preferably, above-mentioned radio-frequency (RF) Receiving Device, each described signal processing module comprises a low noise amplifier and a frequency mixer, described low noise amplifier is used to amplify described received signal, described frequency mixer is used for described received signal is carried out down-conversion, obtain signal after the described frequency conversion, signal is positioned at different frequency bands after each described frequency conversion, and variant frequency band is adjacent successively.
Preferably, above-mentioned radio-frequency (RF) Receiving Device, reception antenna of all corresponding connection of each described signal processing module, described reception antenna is used to corresponding described signal processing module to receive described received signal.
Preferably, above-mentioned radio-frequency (RF) Receiving Device, described Filtering Processing module comprises a filter, described A/D modular converter comprises an A/D converter, the corresponding output that connects a described signal processing module of the input of each described filter, and the output of each described filter all is connected to the input of described A/D converter.
Preferably, above-mentioned described radio-frequency (RF) Receiving Device, described base band also is used for: with described separation signal decode, digital processing and demodulation, and the base band sign indicating number is interpreted as audio signal.
The present invention also provides a kind of radio frequency receiving method of supporting multiple-input, multiple-output on the other hand, described radio frequency receiving method comprises: corresponding respectively one tunnel received signal that receives of at least two signal processing modules that are arranged at a radiofrequency receiving chip, described received signal is carried out down-conversion, signal after the acquisition frequency conversion; Receive after the described frequency conversion of one tunnel correspondence signal at least by two Filtering Processing modules that are arranged at a digital baseband chip respectively and carry out Filtering Processing, obtain signal after the filtering; Signal merges into one the tunnel after the described filtering in each road, obtains combined signal, by the A/D modular converter that is provided with on the described digital baseband chip described combined signal is carried out the A/D conversion; Separate by the signal of a base band after numeric field will carry out the A/D conversion through described A/D modular converter that is provided with on the described digital baseband chip, obtain separation signal.
Preferably, above-mentioned radio frequency receiving method, described at least two signal processing modules are respectively by the corresponding one tunnel described received signal that receives of a reception antenna.
Preferably, above-mentioned radio frequency receiving method obtains also to comprise after the step of described separation signal: by described base band with described separation signal decode, digital processing and demodulation, and the base band sign indicating number is interpreted as audio signal.
In the technique scheme at least one has following beneficial effect: described radio-frequency (RF) Receiving Device and method, realize with a receiving chip by independently a plurality of receiving chips of tradition being supported the MIMO transmission, and adopt each the road signal after the down-conversion is merged into one road signal, by an A/D converter this road signal is carried out the mode that A/D changes and carries out next step digital processing, finally reach the manufacturing cost that reduces the MIMO radio-frequency unit, and the purpose of reduction means volume; Carry out the A/D conversion process because each the road signal after the down-conversion is merged into one road signal simultaneously, also avoided because the problem of the distorted signals that the transmission otherness of different radio frequency passage causes.
Description of drawings
Fig. 1 is the structural representation of prior art MIMO receiver apparatus;
Fig. 2 is the structural representation of the described radio-frequency (RF) Receiving Device of first embodiment of the invention;
Fig. 3 is the spectrogram of described radio-frequency (RF) Receiving Device institute received RF signal;
Fig. 4 is the spectrogram of two-way radiofrequency signal after down-conversion;
Fig. 5 is the structural representation of the described radio-frequency (RF) Receiving Device of second embodiment of the invention;
Fig. 6 is the flow chart of the described radio frequency receiving method of the specific embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 2 is the structural representation of the described MIMO radio-frequency (RF) Receiving Device of first embodiment of the invention, consults Fig. 2, and the described MIMO radio-frequency (RF) Receiving Device of first embodiment of the invention comprises a radiofrequency receiving chip 10 and a digital baseband chip 20, wherein:
This radiofrequency receiving chip 10, comprise at least two signal processing modules, present embodiment is that example describes with two signal processing modules 11,12, the corresponding respectively reception of this signal processing module 11,12 is also handled one tunnel received signal, described received signal is carried out frequency-conversion processing, signal after the acquisition frequency conversion;
This digital baseband chip 20, comprise at least two Filtering Processing modules and an A/D modular converter 23, the corresponding respectively output that is connected to a signal processing module of the input of each Filtering Processing module, present embodiment is to comprise that two Filtering Processing modules 21,22 are that example describes, wherein Filtering Processing module 21 is connected with signal processing module 11, Filtering Processing module 22 is connected with signal processing module 12, Filtering Processing module 21,22 is used to receive after the frequency conversion of one tunnel correspondence signal and carries out Filtering Processing, obtains signal after the filtering; Signal is merged into one road signal after each road filtering that Filtering Processing module 21,12 Filtering Processing obtain afterwards, and the signal after this merging carries out the A/D conversion by A/D modular converter 23.
In addition, this digital baseband chip 20 also comprises a base band 24, wherein the output of A/D modular converter 23 is connected with the input of base band 24, to do further digital processing through the digital signal of A/D conversion in this base band 24, to separate through the signal of A/D conversion at numeric field, and the signal after will separating is decoded, digital processing and demodulation, and the base band sign indicating number is interpreted as audio signal.
In the first embodiment of the invention, described MIMO radio-frequency (RF) Receiving Device also comprises antenna 30,31, and each signal processing module 11,12 is connected to a reception antenna 30 or 31 respectively, obtains received signal by reception antenna.
In the described MIMO radio-frequency (RF) Receiving Device of first embodiment of the invention, receive respectively with frequency or difference two paths of signals frequently by each signal processing module 11,12 that is provided with on the radiofrequency receiving chip 10, each signal processing module 11,12 can receive local frequency by frequency mixer, respectively the signal that is received is carried out frequency-conversion processing, respectively two paths of signals is down-converted to different frequency ranges by different frequency mixers; Afterwards through each road signal of each signal processing module 11,12 frequency-conversion processing, input to respectively in the digital baseband chip 20, different Filtering Processing modules by this digital baseband chip 20 are distinguished filtering to signal, then two paths of signals is merged into one road signal and carried out the A/D conversion, utilize two paths of signals to merge the nonoverlapping characteristic of back frequency domain, two paths of signals is for further processing at numeric field.
Be illustrated in figure 3 as the spectrogram of antenna institute received RF signal, Figure 4 shows that the spectrogram of two paths of signals after down-conversion.Consult Fig. 3 and Fig. 4, through above-mentioned radio-frequency (RF) Receiving Device, antenna 30,31 the two-way radiofrequency signal that receives become the adjacent two paths of signals of frequency spectrum on the frequency domain through after signal processing module 11,12 down-conversions, the adjacent two paths of signals of this frequency spectrum, merge the back by behind the A/D modular converter 23, be for further processing at numeric field.
As Fig. 5 is the structural representation of MIMO radio-frequency (RF) Receiving Device as described in the second embodiment of the invention.Particularly, in this second embodiment, described MIMO radio-frequency (RF) Receiving Device comprises a radiofrequency receiving chip 40 and a digital baseband chip 50.
Wherein, in this radiofrequency receiving chip 40, comprise two signal processing modules, wherein first signal processing module comprises low noise amplifier 410 (LNA, Low Noise Amplifier) and frequency mixer 411, the secondary signal processing module comprises low noise amplifier 420 and frequency mixer 421, low noise amplifier 410,420 is used to amplify the noise of received signal, and frequency mixer 411,421 is used for carrying out to received signal down-conversion.The low noise amplifier of each signal processing module is connected with an antenna respectively in addition, comes received signal by antenna 60 or 61.
Pass through said structure, each signal processing module of radiofrequency receiving chip 40 is realized the frequency-conversion processing of received signal respectively by low noise amplifier and frequency mixer, wherein frequency mixer utilizes local frequency that described received signal is carried out down-conversion by receiving local frequency f1 or f2.
The technical staff in field of the present invention is appreciated that, MIMO radio-frequency transmitter received signal is not limited to only have two-way, based on this, in the described MIMO radio-frequency (RF) Receiving Device of the specific embodiment of the invention, set signal processing module is not limited to only have two-way in the radiofrequency receiving chip 10 or 40, the quantity of set Filtering Processing module also is not limited to two paths in the respective digital baseband chip 20 or 50, specifically can be according to the actual reception signal sets.
More than comprehensive, the described MIMO radio-frequency (RF) Receiving Device of the specific embodiment of the invention, supporting MIMO to use required discrete a plurality of radiofrequency receiving chips tradition is realized by a receiving chip, supporting MIMO to use needed a plurality of A/D converter tradition only changes into and need realize by an A/D converter, for the signal that receives same frequency, on same receiving chip, adopt the multichannel frequency mixer to carry out down-conversion, adopt a plurality of different local frequencies to supply with a plurality of corresponding frequency mixers respectively simultaneously, make the multiple signals after the down-conversion drop in the different frequency bands, and variant frequency band is adjacent successively, and multiple signals are merged into one road signal and carry out ADC and next step digital processing afterwards.
So described MIMO radio-frequency (RF) Receiving Device of the specific embodiment of the invention, on the basis of supporting MIMO, not only can effectively reduce the receiver size, reduce the number of ADC, save the radio-frequency transmitter cost, and can evade because the distorted signals that the transmission otherness of different radio frequency receiver causes.
The specific embodiment of the invention also provides a kind of radio frequency receiving method of supporting multiple-input, multiple-output on the other hand, and this radio frequency receiving method also comprises step from step S601:
S602 is by each antenna receiving signal;
S603, corresponding respectively one tunnel received signal that receives of at least two signal processing modules that are arranged at a radiofrequency receiving chip is carried out frequency conversion with described received signal, signal after the acquisition frequency conversion, wherein each signal processing module is connected with an antenna respectively; In addition, this signal processing module also comprised before described received signal is carried out the step of frequency conversion: receive local frequency, utilize described local frequency that described received signal is carried out down-conversion;
S604 receives after the described frequency conversion of one tunnel correspondence signal at least respectively and carries out Filtering Processing by two Filtering Processing modules that are arranged at a digital baseband chip, obtain signal after the filtering;
S605, signal is merged into one the tunnel and is obtained combined signal after the described filtering in each road, by the A/D modular converter that is provided with on the described digital baseband chip described combined signal is carried out the A/D conversion;
S606 will separate through the signal of A/D conversion at numeric field by a base band, and the signal after will separating is decoded, digital processing and demodulation, and the base band sign indicating number is interpreted as audio signal;
S607 finishes.
Particularly, each signal processing module is realized by a low noise amplifier and a frequency mixer; In addition, the Filtering Processing module comprises a filter, and the A/D modular converter comprises an A/D converter, and the input of each filter is corresponding respectively to be connected with the output of a frequency mixer, and the output of each filter is connected to A/D converter respectively.
Like this, receive frequency or not homogenous frequency signal together respectively by the unlike signal processing module that is provided with on the radiofrequency receiving chip, adopt different reception local oscillators, respectively the signal that is received is handled, respectively two paths of signals is down-converted to different frequency ranges by different frequency mixers; The different Filtering Processing modules of passing through digital baseband chip afterwards are to signal filtering respectively, then two paths of signals is merged into one road signal and carried out the A/D conversion, utilize two paths of signals to merge the nonoverlapping characteristic of back frequency domain, two paths of signals is for further processing at numeric field.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a radio-frequency (RF) Receiving Device of supporting multiple-input, multiple-output is characterized in that, described radio-frequency (RF) Receiving Device comprises:
Radiofrequency receiving chip, described radiofrequency receiving chip comprises at least two signal processing modules, described signal processing module is used for: receive the received signal of one tunnel correspondence and carry out down-conversion, signal after the acquisition frequency conversion;
Digital baseband chip, described digital baseband chip comprise A/D modular converter, base band and at least two Filtering Processing modules; Described Filtering Processing module is used for: receive after the described frequency conversion of one tunnel correspondence signal and carry out Filtering Processing, obtain signal after the filtering; Described A/D modular converter is used for: carry out the A/D conversion to be merged into one tunnel combined signal that obtains by signal after the described filtering in each road; Described base band is used for: the signal after numeric field will carry out the A/D conversion through described A/D modular converter separates, and obtains separation signal.
2. radio-frequency (RF) Receiving Device as claimed in claim 1, it is characterized in that, each described signal processing module comprises a low noise amplifier and a frequency mixer, described low noise amplifier is used to amplify described received signal, described frequency mixer is used for described received signal is carried out down-conversion, obtain signal after the described frequency conversion, signal is positioned at different frequency bands after each described frequency conversion, and variant frequency band is adjacent successively.
3. radio-frequency (RF) Receiving Device as claimed in claim 1 is characterized in that, reception antenna of all corresponding connection of each described signal processing module, and described reception antenna is used to corresponding described signal processing module to receive described received signal.
4. radio-frequency (RF) Receiving Device as claimed in claim 1, it is characterized in that, described Filtering Processing module comprises a filter, described A/D modular converter comprises an A/D converter, the corresponding output that connects a described signal processing module of the input of each described filter, and the output of each described filter all is connected to the input of described A/D converter.
5. radio-frequency (RF) Receiving Device as claimed in claim 1 is characterized in that, described base band also is used for: with described separation signal decode, digital processing and demodulation, and the base band sign indicating number is interpreted as audio signal.
6. a radio frequency receiving method of supporting multiple-input, multiple-output is characterized in that, described radio frequency receiving method comprises:
Corresponding respectively one tunnel received signal that receives of at least two signal processing modules that are arranged at a radiofrequency receiving chip is carried out down-conversion with described received signal, signal after the acquisition frequency conversion;
Receive after the described frequency conversion of one tunnel correspondence signal at least by two Filtering Processing modules that are arranged at a digital baseband chip respectively and carry out Filtering Processing, obtain signal after the filtering;
Signal merges into one the tunnel after the described filtering in each road, obtains combined signal, by the A/D modular converter that is provided with on the described digital baseband chip described combined signal is carried out the A/D conversion;
Separate by the signal of a base band after numeric field will carry out the A/D conversion through described A/D modular converter that is provided with on the described digital baseband chip, obtain separation signal.
7. radio frequency receiving method as claimed in claim 6 is characterized in that, described at least two signal processing modules are respectively by the corresponding one tunnel described received signal that receives of a reception antenna.
8. radio frequency receiving method as claimed in claim 6 is characterized in that, obtains also to comprise after the step of described separation signal:
By described base band with described separation signal decode, digital processing and demodulation, and the base band sign indicating number is interpreted as audio signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100810421A CN101510788A (en) | 2009-03-31 | 2009-03-31 | Radio frequency receiving device and method capable of supporting multi-input and multi-output |
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| CNA2009100810421A CN101510788A (en) | 2009-03-31 | 2009-03-31 | Radio frequency receiving device and method capable of supporting multi-input and multi-output |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011076076A1 (en) * | 2009-12-25 | 2011-06-30 | 华为技术有限公司 | Multi-path reception apparatus, receiver and base station |
| CN102946257A (en) * | 2012-11-05 | 2013-02-27 | 中兴通讯股份有限公司 | Multi-mode receiver and receiving method of multi-mode receiver |
| CN106533518A (en) * | 2016-10-31 | 2017-03-22 | 东南大学 | Multichannel radio receiver and transmitter of reusing analog baseband unit |
| WO2025007279A1 (en) * | 2023-07-03 | 2025-01-09 | 上海磐启微电子有限公司 | Multi-antenna signal cascade apparatus based on linear frequency modulation signal |
-
2009
- 2009-03-31 CN CNA2009100810421A patent/CN101510788A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011076076A1 (en) * | 2009-12-25 | 2011-06-30 | 华为技术有限公司 | Multi-path reception apparatus, receiver and base station |
| CN102946257A (en) * | 2012-11-05 | 2013-02-27 | 中兴通讯股份有限公司 | Multi-mode receiver and receiving method of multi-mode receiver |
| CN102946257B (en) * | 2012-11-05 | 2016-01-20 | 中兴通讯股份有限公司 | A kind of multimode rake receiver and method of reseptance thereof |
| US9634872B2 (en) | 2012-11-05 | 2017-04-25 | Zte Corporation | Multimode receiver and receiving method therefor |
| CN106533518A (en) * | 2016-10-31 | 2017-03-22 | 东南大学 | Multichannel radio receiver and transmitter of reusing analog baseband unit |
| WO2025007279A1 (en) * | 2023-07-03 | 2025-01-09 | 上海磐启微电子有限公司 | Multi-antenna signal cascade apparatus based on linear frequency modulation signal |
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Application publication date: 20090819 |