CN105827254B - A kind of RF transceiver - Google Patents
A kind of RF transceiver Download PDFInfo
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- CN105827254B CN105827254B CN201610252255.6A CN201610252255A CN105827254B CN 105827254 B CN105827254 B CN 105827254B CN 201610252255 A CN201610252255 A CN 201610252255A CN 105827254 B CN105827254 B CN 105827254B
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- 230000010355 oscillation Effects 0.000 claims abstract description 70
- 238000006116 polymerization reaction Methods 0.000 claims description 18
- 230000002776 aggregation Effects 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
- H04B1/0082—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands with a common local oscillator for more than one band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
The invention discloses a kind of RF transceivers, are applied to field of mobile terminals, RF transceiver includes: a local oscillation circuit group, including at least two local oscillation circuits；One radio frequency transmitting channel connects the local oscillation circuit group, to export a radio frequency analog signal；One RF receiving circuit group, including at least two RF receiving circuits, the RF receiving circuit group is to receive radio frequency analog signal；One frequency changer circuit group, including at least two frequency changer circuits, the frequency changer circuit group connect the local oscillation circuit group；One selecting unit is separately connected the RF receiving circuit group and the frequency changer circuit group, to be that the RF receiving circuit selects a frequency changer circuit according to preset strategy；One modem module connects the frequency changer circuit group, and the digital signal to export to the frequency changer circuit is modulated demodulation.
Description
Technical field
The present invention relates to field of mobile terminals more particularly to a kind of RF transceivers.
Background technique
As demand of the people to the mobile data of mobile terminal is increasing, mobile transmission speed is also required to increasingly
Fastly.From 2G network, the 4G network of 3G network till now, the downstream transmission data of mobile terminal the more become the more big, therefore 4G LTE
Carrier aggregation technology is produced in (Long Term Evolution, long term evolution) technology, so that the transmission speed of terminal mentions again
A class is risen.LTE carrier aggregation technology has in frequency range and the fundamental characteristics of across frequency range integration of wireless channel, can mention
Delay is reduced while rising the message transmission rate of user.Although current LTE mobile terminal can support multiple LTE radios to believe
Road, but can only be downloaded every time by a channel；And LTE carrier aggregation may be implemented to penetrate in two or more LTE simultaneously
Downloading on frequency channel facilitates the specified LTE set of data rates for making full use of chipset.Carrier aggregation technology is in radio frequency at present
It needs to realize the downloading on two or more LTE radio channels using multiple RF transceivers when applying in circuit, circuit is set
Meter aspect is more complex.
Summary of the invention
Under needing to realize on multiple LTE radio channels using multiple RF transceivers for existing carrier aggregation technology
The problem of load, now provides a kind of downloading that aims at and can be realized on multiple LTE radio channels using a RF transceiver
RF transceiver.
Specific technical solution is as follows:
A kind of RF transceiver, comprising:
One local oscillation circuit group, including at least two local oscillation circuits；
One radio frequency transmitting channel connects the local oscillation circuit group, to export a radio frequency analog signal；
One RF receiving circuit group, including at least two RF receiving circuits, the RF receiving circuit group is to receive
Radio frequency analog signal；
One frequency changer circuit group, including at least two frequency changer circuits, the frequency changer circuit group connect the local oscillation circuit group；
One selecting unit is separately connected the RF receiving circuit group and the frequency changer circuit group, to according to default plan
The slightly described RF receiving circuit selects a frequency changer circuit；
One modem module connects the frequency changer circuit group, to digital signal that the frequency changer circuit is exported into
Row modulation /demodulation.
Preferably, the local oscillation circuit group includes:
One first local oscillation circuit, to generate one first local oscillation signal and receive a clock signal；
One second local oscillation circuit, to generate one second local oscillation signal and receive the clock signal.
Preferably, the radio frequency transmitting channel includes:
One first frequency changer circuit is believed to receive the first digital signal according to first local oscillation signal and the clock
Number, first digital signal is converted into the second digital signal of default frequency range and is exported；
One radio frequency transmitter circuitry connects first frequency changer circuit, second digital signal is converted to first
First analog signal output of frequency range, or
First analog signal output of the radio frequency transmitter circuitry second digital signal to be converted to the second frequency range.
Preferably, first digital signal is digital uplink signal.
Preferably, the RF receiving circuit group includes:
One first RF receiving circuit, to receive the second analog signal of the first frequency range；
One second RF receiving circuit, to receive the second analog signal of the second frequency range.
Preferably, the frequency changer circuit group includes:
One second frequency changer circuit, to according to first local oscillation signal and the clock signal, by first frequency range
The second analog signal be converted to the third digital signal of the first frequency range, and export, or
Second frequency changer circuit is to according to first local oscillation signal and the clock signal, by second frequency range
The second analog signal be converted to the third digital signal of the second frequency range, and export.
Preferably, the third digital signal of first frequency range is downstream digital signal, or
The third digital signal of second frequency range is downstream digital signal.
Preferably, the frequency changer circuit group further include:
One third frequency changer circuit, to according to second local oscillation signal and the clock signal, by first frequency range
The second analog signal be converted to the 4th digital signal of the first frequency range, and export, or
The third frequency changer circuit is to according to second local oscillation signal and the clock signal, by second frequency range
The second analog signal be converted to the 4th digital signal of the second frequency range, and export.
Preferably, the 4th digital signal of first frequency range is downstream digital signal, or
4th digital signal of second frequency range is downstream digital signal.
Preferably, the preset strategy are as follows:
When carrierfree polymerization, the radio frequency transmitter circuitry exports the first analog signal of first frequency range, and described the
Two frequency changer circuits are to according to first local oscillation signal and the clock signal, by the second analog signal of first frequency range
The third digital signal of the first frequency range is converted to, and is exported；Or
When carrierfree polymerization, the radio frequency transmitter circuitry exports the first analog signal of second frequency range, and described the
Three frequency changer circuits are to according to second local oscillation signal and the clock signal, by the second analog signal of second frequency range
The 4th digital signal of the second frequency range is converted to, and is exported.
Preferably, the preset strategy are as follows:
When there is carrier wave polymerization, the radio frequency transmitter circuitry exports the first analog signal of first frequency range, and described
Two frequency changer circuits are to according to first local oscillation signal and the clock signal, by the second analog signal of first frequency range
The third digital signal of the first frequency range is converted to, and is exported；The third frequency changer circuit is to according to second local oscillation signal
With the clock signal, the second analog signal of second frequency range is converted to the 4th digital signal of the second frequency range, and defeated
Out；Or
When there is carrier wave polymerization, the radio frequency transmitter circuitry exports the first analog signal of second frequency range, and described
Two frequency changer circuits are to according to first local oscillation signal and the clock signal, by the second analog signal of second frequency range
The third digital signal of the second frequency range is converted to, and is exported；Third frequency changer circuit is to according to second local oscillation signal and institute
Clock signal is stated, the second analog signal of first frequency range is converted to the 4th digital signal of the first frequency range, and is exported.
Above-mentioned technical proposal the utility model has the advantages that
The technical program is connect when using descending carrier polymerization technique by addition local oscillation circuit, frequency changer circuit and radio frequency
Receiving circuit realizes the purpose that can support to demodulate the reception signal of at least two frequency ranges while one group of transmitting signal output, reaches
The effect of the quantity of RF transceiver is reduced, while reducing the volume and quality of mobile terminal.
Detailed description of the invention
Fig. 1 is a kind of whole circuit diagram of RF transceiver of the present invention；
Fig. 2 is the schematic diagram of the first embodiment of RF transceiver of the present invention；
Fig. 3 is the schematic diagram of second of embodiment of RF transceiver of the present invention；
Fig. 4 is the schematic diagram of the third embodiment of RF transceiver of the present invention；
Fig. 5 is the schematic diagram of the 4th kind of embodiment of RF transceiver of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
As shown in Figure 1, a kind of RF transceiver, comprising:
One local oscillation circuit group 4, including at least two local oscillation circuits；
One radio frequency transmitting channel 1 connects local oscillation circuit group 4, to export a radio frequency analog signal；
One RF receiving circuit group 3, including at least two RF receiving circuits, RF receiving circuit group 3 are penetrated to receive
Frequency analog signal；
One frequency changer circuit group 5, including at least two frequency changer circuits, frequency changer circuit group 5 connect local oscillation circuit group 4；
One selecting unit 6, is separately connected RF receiving circuit group 3 and frequency changer circuit group 5, to be to penetrate according to preset strategy
Frequency receives circuit and selects a frequency changer circuit；
One modem module 2 connects frequency changer circuit group 5, to be modulated to the digital signal that frequency changer circuit exports
Demodulation.
In the present embodiment, pass through addition local oscillation circuit, frequency changer circuit and radio frequency when using descending carrier polymerization technique
Receiving circuit realizes the purpose that can support to demodulate the reception signal of at least two frequency ranges while one group of transmitting signal output, reaches
The effect for reducing the quantity of RF transceiver has been arrived, while having reduced the volume and quality of mobile terminal.
Preferably, local oscillation circuit group 4 can include:
One first local oscillation circuit 41, to generate one first local oscillation signal and receive a clock signal；
One second local oscillation circuit 42, to generate one second local oscillation signal and receive clock signal.
It can produce the radio frequency analog of a frequency (local frequency) and RF receiving circuit received by local oscillation circuit
The frequency of signal is mixed, to generate the intermediate-freuqncy signal of fixed frequency, the frequency fixing-stable of intermediate-freuqncy signal is easily processed.
In a preferred embodiment, radio frequency transmitting channel 1 includes:
One first frequency changer circuit 11, to receive the first digital signal, according to the first local oscillation signal and clock signal, by
One digital signal is converted to the second digital signal of default frequency range and exports；
One radio frequency transmitter circuitry 12 connects the first frequency changer circuit 11, the second digital signal is converted to the first frequency range
The first analog signal output, or
First analog signal output of the radio frequency transmitter circuitry 12 the second digital signal to be converted to the second frequency range.
Further, the first digital signal is digital uplink signal.
In a preferred embodiment, RF receiving circuit group 3 includes:
One first RF receiving circuit 31, to receive the second analog signal of the first frequency range；
One second RF receiving circuit 32, to receive the second analog signal of the second frequency range.
In the present embodiment, RF receiving circuit group 3 may include multiple for receiving the RF receiving circuit of different frequency range,
The purpose downloaded on multiple LTE radio channels is realized by the cooperation with frequency changer circuit group 5.
In a preferred embodiment, frequency changer circuit group 5 can include:
Second frequency changer circuit 51, according to the first local oscillation signal and clock signal, the second simulation of the first frequency range to be believed
Number the third digital signal of the first frequency range is converted to, and exported, or
Second frequency changer circuit 51 is to according to the first local oscillation signal and clock signal, by the second analog signal of the second frequency range
The third digital signal of the second frequency range is converted to, and is exported.
One ground of progress, the third digital signal of the first frequency range are downstream digital signal, the third digital signal of the second frequency range
For downstream digital signal.
In a preferred embodiment, frequency changer circuit group 5 may also include that
Third frequency changer circuit 52, according to the second local oscillation signal and clock signal, the second simulation of the first frequency range to be believed
Number the 4th digital signal of the first frequency range is converted to, and exported, or
Third frequency changer circuit 52 is to according to the second local oscillation signal and clock signal, by the second analog signal of the second frequency range
The 4th digital signal of the second frequency range is converted to, and is exported.
Further, the 4th digital signal of the first frequency range is downstream digital signal, the 4th digital signal of the second frequency range
For downstream digital signal.
As shown in Fig. 2, in a preferred embodiment, preset strategy are as follows: when carrierfree polymerization, radio frequency transmitter circuitry 12 is defeated
First analog signal of the first frequency range out, the second frequency changer circuit 51 are separately connected the first local oscillation circuit 41 and the first radio frequency reception electricity
Road 31, the second frequency changer circuit 51 is to the first local oscillation signal and clock signal that are generated according to the first local oscillation circuit 41, by first
Second analog signal of received first frequency range of RF receiving circuit 31 is converted to the third digital signal of the first frequency range, and defeated
Out.
In carrierfree polymerization, what the radio frequency analog signal and RF receiving circuit that radio frequency transmitting channel 1 emits received
The frequency range of radio frequency analog signal is consistent, and works in only one RF receiving circuit of RF receiving circuit group 3.
As shown in figure 3, in a preferred embodiment, preset strategy are as follows:
When carrierfree polymerization, radio frequency transmitter circuitry 12 exports the first analog signal of the second frequency range, third frequency changer circuit
52 are separately connected the second local oscillation circuit 42 and the second RF receiving circuit 32, and third frequency changer circuit 52 is to according to the second local oscillator electricity
The second local oscillation signal and clock signal that road 42 generates, by the second simulation of received second frequency range of the second RF receiving circuit 32
Signal is converted to the 4th digital signal of the second frequency range, and exports.
In carrierfree polymerization, the work of only one RF receiving circuit of RF receiving circuit group 3, and the radio frequency to work connects
The frequency range for receiving the received radio frequency analog signal of circuit is identical as the frequency range of radio frequency analog signal that radio frequency transmitting channel 1 emits.
As shown in figure 4, in a preferred embodiment, preset strategy are as follows: when there is carrier wave polymerization, radio frequency transmitter circuitry 12 is defeated
First analog signal of the first frequency range out, the second frequency changer circuit 51 is to according to the first local oscillation signal and clock signal, by first
Second analog signal of frequency range is converted to the third digital signal of the first frequency range, and exports；Third frequency changer circuit 52 is to basis
Second analog signal of the second frequency range is converted to the 4th digital signal of the second frequency range by the second local oscillation signal and clock signal,
And it exports.
When there is carrier wave polymerization, if radio frequency transmitter circuitry 12 exports the first analog signal of the first frequency range, selecting unit 6
The first RF receiving circuit 31 is selected to connect with the second frequency changer circuit 51, the second RF receiving circuit 32 and third frequency changer circuit
52, the second analog signal of the first frequency range is converted to the third digital signal of the first frequency range using the second frequency changer circuit 51, benefit
The 4th digital signal that second analog signal of the second frequency range is converted to the second frequency range with third frequency changer circuit 52, passes through modulation
Demodulating unit 2 is modulated demodulation to the 4th digital signal of the third digital signal of the first frequency range and the second frequency range respectively with defeated
Out to baseband chip, to complete the downloading on multiple LTE radio channels.
As shown in figure 5, in a preferred embodiment, preset strategy are as follows: when there is carrier wave polymerization, radio frequency transmitter circuitry 12 is defeated
First analog signal of the second frequency range out, the second frequency changer circuit 51 is to according to the first local oscillation signal and clock signal, by second
Second analog signal of frequency range is converted to the third digital signal of the second frequency range, and exports；Third frequency changer circuit 52 is to basis
Second analog signal of the first frequency range is converted to the 4th digital signal of the first frequency range by the second local oscillation signal and clock signal,
And it exports.
When there is carrier wave polymerization, if radio frequency transmitter circuitry 12 exports the first analog signal of the second frequency range, selecting unit 6
The first RF receiving circuit 31 is selected to connect with third frequency changer circuit 52, the second RF receiving circuit 32 and the second frequency changer circuit
51, the second analog signal of the second frequency range is converted to the third digital signal of the second frequency range using the second frequency changer circuit 51；Benefit
The 4th digital signal that second analog signal of the first frequency range is converted to the first frequency range with third frequency changer circuit 52, passes through modulation
Demodulating unit 2 is modulated demodulation to the 4th digital signal of the third digital signal of the second frequency range and the first frequency range respectively with defeated
Out to baseband chip, to complete the downloading on multiple LTE radio channels.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all be included within the scope of the present invention.
Claims (4)
1. a kind of RF transceiver characterized by comprising
One local oscillation circuit group, including at least two local oscillation circuits；
One radio frequency transmitting channel connects the local oscillation circuit group, to export a radio frequency analog signal；
One RF receiving circuit group, including at least two RF receiving circuits, the RF receiving circuit group is to receive radio frequency
Analog signal；
One frequency changer circuit group, including at least two frequency changer circuits, the frequency changer circuit group connect the local oscillation circuit group；
One selecting unit is separately connected the RF receiving circuit group and the frequency changer circuit group, to be according to preset strategy
The RF receiving circuit selects a frequency changer circuit；
One modem module connects the frequency changer circuit group, and the digital signal to export to the frequency changer circuit is adjusted
System demodulation；
The local oscillation circuit group includes:
One first local oscillation circuit, to generate one first local oscillation signal and receive a clock signal；
One second local oscillation circuit, to generate one second local oscillation signal and receive the clock signal；
The radio frequency transmitting channel includes:
One first frequency changer circuit, will according to first local oscillation signal and the clock signal to receive the first digital signal
First digital signal is converted to the second digital signal of default frequency range and exports；
One radio frequency transmitter circuitry connects first frequency changer circuit, second digital signal is converted to the first frequency range
The first analog signal output, or
First analog signal output of the radio frequency transmitter circuitry second digital signal to be converted to the second frequency range；
The RF receiving circuit group includes:
One first RF receiving circuit, to receive the second analog signal of the first frequency range；
One second RF receiving circuit, to receive the second analog signal of the second frequency range；
The frequency changer circuit group includes:
One second frequency changer circuit, to according to first local oscillation signal and the clock signal, by the of first frequency range
Two analog signals are converted to the third digital signal of the first frequency range, and export, or
Second frequency changer circuit is to according to first local oscillation signal and the clock signal, by the of second frequency range
Two analog signals are converted to the third digital signal of the second frequency range, and export；
One third frequency changer circuit, to according to second local oscillation signal and the clock signal, by the of first frequency range
Two analog signals are converted to the 4th digital signal of the first frequency range, and export, or
The third frequency changer circuit is to according to second local oscillation signal and the clock signal, by second frequency range
Second analog signal is converted to the 4th digital signal of the second frequency range, and exports；
The preset strategy are as follows:
When carrierfree polymerization, the radio frequency transmitter circuitry exports the first analog signal of first frequency range, and described second becomes
Frequency circuit is according to first local oscillation signal and the clock signal, the second analog signal of first frequency range to be converted
For the third digital signal of the first frequency range, and export；Or
When carrierfree polymerization, the radio frequency transmitter circuitry exports the first analog signal of second frequency range, and the third becomes
Frequency circuit is according to second local oscillation signal and the clock signal, the second analog signal of second frequency range to be converted
For the 4th digital signal of the second frequency range, and export；
When there is carrier wave polymerization, the radio frequency transmitter circuitry exports the first analog signal of first frequency range, and described second becomes
Frequency circuit is according to first local oscillation signal and the clock signal, the second analog signal of first frequency range to be converted
For the third digital signal of the first frequency range, and export；The third frequency changer circuit is to according to second local oscillation signal and institute
Clock signal is stated, the second analog signal of second frequency range is converted to the 4th digital signal of the second frequency range, and is exported；Or
When there is carrier wave polymerization, the radio frequency transmitter circuitry exports the first analog signal of second frequency range, and described second becomes
Frequency circuit is according to first local oscillation signal and the clock signal, the second analog signal of second frequency range to be converted
For the third digital signal of the second frequency range, and export；Third frequency changer circuit to according to second local oscillation signal and it is described when
Second analog signal of first frequency range, is converted to the 4th digital signal of the first frequency range by clock signal, and is exported.
2. RF transceiver as described in claim 1, which is characterized in that first digital signal is digital uplink signal.
3. RF transceiver as described in claim 1, which is characterized in that the third digital signal of first frequency range is downlink
Digital signal, or
The third digital signal of second frequency range is downstream digital signal.
4. RF transceiver as described in claim 1, which is characterized in that the 4th digital signal of first frequency range is downlink
Digital signal, or
4th digital signal of second frequency range is downstream digital signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252255.6A CN105827254B (en) | 2016-04-21 | 2016-04-21 | A kind of RF transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610252255.6A CN105827254B (en) | 2016-04-21 | 2016-04-21 | A kind of RF transceiver |
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| Publication Number | Publication Date |
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| CN105827254A CN105827254A (en) | 2016-08-03 |
| CN105827254B true CN105827254B (en) | 2019-08-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694567A (en) * | 2012-06-11 | 2012-09-26 | 天津里外科技有限公司 | Front end radio frequency transceiver system for multi-standard fully-compatible mobile user terminal chip |
| CN103534974A (en) * | 2011-05-17 | 2014-01-22 | 高通股份有限公司 | Non-adjacent carrier aggregation architecture |
| CN104081706A (en) * | 2011-11-04 | 2014-10-01 | 爱立信调制解调器有限公司 | Non-contiguous carrier aggregation |
| CN104782050A (en) * | 2012-08-15 | 2015-07-15 | 美国博通公司 | Direct conversion receiver circuit for concurrent reception of multiple carriers |
| CN105308868A (en) * | 2013-06-17 | 2016-02-03 | 高通股份有限公司 | Method and apparatus for concurrent communication with multiple wireless communication systems of different radio access technologies |
-
2016
- 2016-04-21 CN CN201610252255.6A patent/CN105827254B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103534974A (en) * | 2011-05-17 | 2014-01-22 | 高通股份有限公司 | Non-adjacent carrier aggregation architecture |
| CN104081706A (en) * | 2011-11-04 | 2014-10-01 | 爱立信调制解调器有限公司 | Non-contiguous carrier aggregation |
| CN102694567A (en) * | 2012-06-11 | 2012-09-26 | 天津里外科技有限公司 | Front end radio frequency transceiver system for multi-standard fully-compatible mobile user terminal chip |
| CN104782050A (en) * | 2012-08-15 | 2015-07-15 | 美国博通公司 | Direct conversion receiver circuit for concurrent reception of multiple carriers |
| CN105308868A (en) * | 2013-06-17 | 2016-02-03 | 高通股份有限公司 | Method and apparatus for concurrent communication with multiple wireless communication systems of different radio access technologies |
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| Publication number | Publication date |
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| CN105827254A (en) | 2016-08-03 |
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