CN102611475A - Direct variable-frequency transmitter-receiver for 60 GHz wireless communication - Google Patents
Direct variable-frequency transmitter-receiver for 60 GHz wireless communication Download PDFInfo
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Abstract
The invention discloses a direct variable-frequency transmitter-receiver for 60 GHz wireless communication, comprising a 59-64 GHz antenna, a 59-64 GHz band-pass filter, a 59-64 GHz switch, a 59-64 GHz low-noise amplifier, a 59-64 GHz demodulator, a variable bandwidth low-pass filter for receiving 1.08 GHz and 540 MHz, a variable bandwidth gain amplifier for receiving 1.08 GHz and 540 MHz, and an analog to digital converter of a 2.16 Gsps sampling rate, which are serially connected in sequence; the direct variable-frequency transmitter-receiver further comprises a digital to analog converter of a 2.16 Gsps sampling rate, a variable bandwidth gain amplifier for emitting 1.08 GHz and 540 MHz, a variable bandwidth low-pass filter for emitting 1.08 GHz and 540 MHz, a 59-64 GHz modulator and a 59-64 GHz power amplifier, which are serially connected in sequence; and the direct variable-frequency transmitter-receiver further comprises a 59-64 GHz frequency synthesizer which is respectively connected with the 59-64 GHz demodulator and the 59-64 GHz modulator. With the adoption of the direct variable-frequency transmitter-receiver disclosed by the invention, the direct variable-frequency transmitter-receiver which is suitable for a 60 GHz frequency spectrum plan of China is designed.
Description
Technical field
The present invention relates to high speed short distance radio communication system technical field; Relate in particular to a kind of Direct Conversion transceiver of the 60GHz of being used for radio communication, be applied to the 60GHz high speed short distance radio communication system among the WPAN (Wireless Personal Area Network).
Background technology
The advantage of 60GHz radio communication is the transmission rate that can realize up to the Gbps magnitude, and this technology will become the mainstream technology of ultrahigh speed Wireless Personal Network.Consumer electronics manufacturers such as NEC, Samsung, Panasonic and LG have set up WirelessHD alliance jointly and have promoted the application of 60GHz technology in no compression high definition video transmission at present, visible its huge market potential.Present 60GHz technology in the world becomes the focus of academia and industrial quarters concern; ISSCC (International Solid State Circuits Conference) is offered special topic every year and is collected the relevant paper of 60GHz technology, and the difficult point of many aspects such as the design of 60GHz millimetre-wave circuit, test receives extensive concern.
China has opened 59 to 64GHz frequency ranges and used frequency range as the 60GHz technology at present, and is still because technical difficulty is bigger, at the early-stage to the application study of this frequency range, also do not have to realize can be used for the Direct Conversion transceiver of 60GHz radio communication.
Summary of the invention
The technical problem that (one) will solve
In view of this, main purpose of the present invention is to provide a kind of Direct Conversion transceiver of the 60GHz of being used for radio communication, to design the Direct Conversion structure transceiver of the 60GHz frequency spectrum planning that is applicable to China.
(2) technical scheme
For achieving the above object, the invention provides a kind of Direct Conversion transceiver of the 60GHz of being used for radio communication, this Direct Conversion transceiver comprises:
The analog to digital converter 11 of 59 to 64GHz antenna 1,59 to 64GHz band pass filter 2,59 to 64GHz switch 3,59 to 64GHz low noise amplifier 4,59 to the 64GHz demodulators 5 that are connected in series successively, reception 1.08GHz and 540MHz bandwidth varying low pass filter 6, reception 1.08GHz and 540MHz bandwidth varying and gain amplifier 7 and 2.16Gsps sample rate;
The digital to analog converter 12 of the 2.16Gsps sample rate that is connected in series successively, emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14, emission 1.08GHz and 540MHz bandwidth varying low pass filter 13,59 to 64GHz modulator 9 and 59 to 64GHz power amplifiers 10, and 59 to 64GHz power amplifiers 10 also are connected in 59 to 64GHz switches 3; And
Be connected to 59 to 64GHz frequency synthesizers 8 of 59 to 64GHz demodulators 5 and 59 to 64GHz modulators 9.
In the such scheme, the analog to digital converter 11 of said 59 to 64GHz antenna 1,59 to 64GHz band pass filter 2,59 to 64GHz switch 3,59 to 64GHz low noise amplifier 4,59 to 64GHz demodulators 5, reception 1.08GHz and 540MHz bandwidth varying low pass filter 6, reception 1.08GHz and 540MHz bandwidth varying and gain amplifier 7,2.16Gsps sample rate and 59 to 64GHz frequency synthesizers 8 constitute the reception links.
In the such scheme; Receive in the link at this; 59 to 64GHz wireless signal at first receives through said 59 to 64GHz antennas 1; Remove interference outside the band through said 59 to 64GHz band pass filters 2, input to said 59 to 64GHz low noise amplifiers 4 behind the control selective reception path through said 59 to 64GHz switches 3 and amplify; Amplifying signal inputs to said 59 to 64GHz demodulators 5; RF input port as said 59 to 64GHz demodulators 5; Simultaneously the local oscillator port of local oscillation signal to said 59 to 64GHz demodulators 5 is provided by said 59 to 64GHz frequency synthesizers 8; Through after the down-conversion radiofrequency signal is converted to analog baseband signal, after the down-conversion one tunnel radiofrequency signal frequency conversion is handled for the IQ two-way; Analog baseband signal inputs to said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 carries out filtering; The output of said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 offers the analog to digital converter 11 that signal that said reception 1.08GHz and 540MHz bandwidth varying and gain amplifier 7 be amplified to 0dBm offers said 2.16Gsps sample rate afterwards and samples; Wherein said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 with said receive 1.08GHz and 540MHz bandwidth varying and gain amplifier 7 according to actual reception to signal bandwidth switch; When antenna 1 receives 2.16GHz bandwidth RF signal, select the 1.08GHz bandwidth, when said 59 to 64GHz antennas 1 receive 1.08GHz bandwidth RF signal, select the 540MHz bandwidth.
In the such scheme, the digital to analog converter 12 of said 2.16Gsps sample rate, emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14, emission 1.08GHz and 540MHz bandwidth varying low pass filter 13,59 to 64GHz modulator 9 and 59 to 64GHz power amplifier 10,59 to 64GHz switch 3,59 to 64GHz band pass filter 2,59 to 64GHz antennas 1 and 59 to 64GHz frequency synthesizers 8 constitute transmitting chain.
In the such scheme; In this transmitting chain; Digital baseband signal converts analog baseband signal into through the digital to analog converter 12 of said 2.16Gsps sample rate; At first inputing to said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14 amplifies; And its Gain Adjustable joint, amplified signal said emission 1.08GHz of input and 540MHz bandwidth varying low pass filter 13 carry out filtering, and said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14 are regulated according to system's actual transmit signal with the bandwidth of said emission 1.08GHz and 540MHz bandwidth varying low pass filter 13; When the emission 2.16GHz of system bandwidth signal, select bandwidth 1.08GHz, when the emission 1.08GHz of system bandwidth signal, select bandwidth 540MHz; Import the intermediate frequency input port of said 59 to 64GHz modulators 9 subsequently; The local oscillator port of said 59 to 64GHz modulators 9 is provided by said 59 to 64GHz frequency synthesizers 8; IQ two paths of signals through after the up-conversion adds up to one road signal and inputs to said 59 to 64GHz power amplifiers 10; Said 59 to 64GHz power amplifiers 10 export said 59 to 64GHz switches 3 to and select the emission path, launch through getting into said 59 to 64GHz antennas 1 after the filtering outside said 59 to the 64GHz band pass filters 2 of entering are with behind the switch.
In the such scheme, this Direct Conversion transceiver adopts the method for single-conversion, and direct radiofrequency signal with 59 to 64GHz is converted to 0 to 1.08GHz and 0 to 540MHz analog baseband signal.
In the such scheme, said reception 1.08GHz and 540MHz bandwidth varying and gain amplifier 7 and said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14 are used between 1.08GHz bandwidth and 540MHz bandwidth, switching.
In the such scheme, said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 and said emission 1.08GHz and 540MHz bandwidth varying low pass filter 13 are used between 1.08GHz bandwidth and 540MHz bandwidth, switching.
In the such scheme, this Direct Conversion transceiver adopts the local frequency that equates with radio-frequency carrier, makes signal directly be converted to ABB from carrier wave.
In the such scheme, this Direct Conversion transceiver is realized the analog baseband signal of 1.08GHz bandwidth and 540MHz bandwidth is switched, thereby is made transceiver can handle the signal of two kinds of bandwidth through changing the bandwidth of variable gain amplifier; Through changing the bandwidth of low pass filter, realize the analog baseband signal of 1.08GHz bandwidth and 540MHz bandwidth is switched, thereby make transceiver can handle the signal of two kinds of bandwidth.
(3) beneficial effect
Can find out that from technique scheme the present invention has following beneficial effect:
1, utilizes the present invention, adopted single-conversion, reduced device count, increased the integrated level of chip design, can further reduce the realization cost.
2, utilize the present invention,,, increased the flexibility of system so can handle 2.16GHz and two kinds of bandwidth RF signals of 1.08GHz owing to adopted the low pass filter and the variable gain amplifier of bandwidth varying.
3, utilize the present invention, owing to adopted the frequency synthesizer in broadband can produce 6 local oscillation signals in the 59-64GHz frequency band, thus can cover 6 band of Chinese 60GHz standard, improved the utilization ratio of hardware.
Description of drawings
Fig. 1 is the structural representation of the Direct Conversion transceiver of the 60GHz of being used for radio communication provided by the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, to further explain of the present invention.
This Direct Conversion transceiver that is used for the 60GHz radio communication provided by the invention; Adopt the method for single-conversion; Direct radiofrequency signal with 59 to 64GHz is converted to 0 to 1.08GHz and 0 to 540MHz analog baseband signal; Can handle carrier wave in 59 to 64GHz scopes, bandwidth is the radiofrequency signal of 2.16GHz and 1.08GHz.
As shown in Figure 1; Fig. 1 is the structural representation of the Direct Conversion transceiver of the 60GHz of being used for radio communication provided by the invention, and this Direct Conversion transceiver comprises: 59 to the 64GHz antennas 1,59 that are connected in series successively to 64GHz band pass filter BPF 2,59 to 64GHz switch S witch3,59 to 64GHz low noise amplifier LNA4,59 to 64GHz demodulator Demodulator 5, receive 1.08GHz and 540MHz bandwidth varying low pass filter 6, receive the analog to digital converter ADC 11 of 1.08GHz and 540MHz bandwidth varying and gain amplifier VGA 7 and 2.16Gsps sample rate; The digital to analog converter DAC 12 of the 2.16Gsps sample rate that is connected in series successively, emission 1.08GHz and 540MHz bandwidth varying and gain amplifier VGA 14, emission 1.08GHz and 540MHz bandwidth varying low pass filter 13,59 are to 64GHz modulator Modulator 9 and 59 to 64GHz power amplifiers 10, and 59 to 64GHz power amplifiers 10 also are connected in 59 to 64GHz switch S witch3; And 59 to the 64GHz frequency synthesizer Frequency Synthesizer 8 that are connected to 59 to 64GHz demodulator Demodulator 5 and 59 to 64GHz modulator Modulator 9.
Wherein, the analog to digital converter 11 of said 59 to 64GHz antenna 1,59 to 64GHz band pass filter 2,59 to 64GHz switch 3,59 to 64GHz low noise amplifier 4,59 to 64GHz demodulators 5, reception 1.08GHz and 540MHz bandwidth varying low pass filter 6, reception 1.08GHz and 540MHz bandwidth varying and gain amplifier 7,2.16Gsps sample rate and 59 to 64GHz frequency synthesizers 8 constitute the reception links.
Receive in the link at this; 59 to 64GHz wireless signal at first receives through said 59 to 64GHz antennas 1; Remove interference outside the band through said 59 to 64GHz band pass filters 2, input to said 59 to 64GHz low noise amplifiers 4 behind the control selective reception path through said 59 to 64GHz switches 3 and amplify; Amplifying signal inputs to said 59 to 64GHz demodulators 5; RF input port as said 59 to 64GHz demodulators 5; Simultaneously the local oscillator port of local oscillation signal to said 59 to 64GHz demodulators 5 is provided by said 59 to 64GHz frequency synthesizers 8; Through after the down-conversion radiofrequency signal is converted to analog baseband signal, after the down-conversion one tunnel radiofrequency signal frequency conversion is handled for the IQ two-way; Analog baseband signal inputs to said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 carries out filtering; The output of said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 offers the analog to digital converter 11 that signal that said reception 1.08GHz and 540MHz bandwidth varying and gain amplifier 7 be amplified to 0dBm offers said 2.16Gsps sample rate afterwards and samples; Wherein said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 with said receive 1.08GHz and 540MHz bandwidth varying and gain amplifier 7 according to actual reception to signal bandwidth switch; When antenna 1 receives 2.16GHz bandwidth RF signal, select the 1.08GHz bandwidth, when said 59 to 64GHz antennas 1 receive 1.08GHz bandwidth RF signal, select the 540MHz bandwidth.
The digital to analog converter 12 of said 2.16Gsps sample rate, emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14, emission 1.08GHz and 540MHz bandwidth varying low pass filter 13,59 to 64GHz modulator 9 and 59 to 64GHz power amplifier 10,59 to 64GHz switch 3,59 to 64GHz band pass filter 2,59 to 64GHz antennas 1 and 59 to 64GHz frequency synthesizers 8 constitute transmitting chain.
In this transmitting chain; Digital baseband signal converts analog baseband signal into through the digital to analog converter 12 of said 2.16Gsps sample rate; At first inputing to said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14 amplifies; And its Gain Adjustable joint; Amplified signal said emission 1.08GHz of input and 540MHz bandwidth varying low pass filter 13 carry out filtering; Said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14 are regulated according to system's actual transmit signal with the bandwidth of said emission 1.08GHz and 540MHz bandwidth varying low pass filter 13, when the emission 2.16GHz of system bandwidth signal, select bandwidth 1.08GHz, when the emission 1.08GHz of system bandwidth signal, select bandwidth 540MHz; Import the intermediate frequency input port of said 59 to 64GHz modulators 9 subsequently; The local oscillator port of said 59 to 64GHz modulators 9 is provided by said 59 to 64GHz frequency synthesizers 8; IQ two paths of signals through after the up-conversion adds up to one road signal and inputs to said 59 to 64GHz power amplifiers 10; Said 59 to 64GHz power amplifiers 10 export said 59 to 64GHz switches 3 to and select the emission path, launch through getting into said 59 to 64GHz antennas 1 after the filtering outside said 59 to the 64GHz band pass filters 2 of entering are with behind the switch.
In the present invention, said reception 1.08GHz and 540MHz bandwidth varying and gain amplifier 7 and said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier 14 are used between 1.08GHz bandwidth and 540MHz bandwidth, switching.Said reception 1.08GHz and 540MHz bandwidth varying low pass filter 6 and said emission 1.08GHz and 540MHz bandwidth varying low pass filter 13 are used between 1.08GHz bandwidth and 540MHz bandwidth, switching.
In the present invention, this Direct Conversion transceiver adopts the local frequency that equates with radio-frequency carrier, makes signal directly be converted to ABB from carrier wave.This Direct Conversion transceiver is realized the analog baseband signal of 1.08GHz bandwidth and 540MHz bandwidth is switched, thereby is made transceiver can handle the signal of two kinds of bandwidth through changing the bandwidth of variable gain amplifier; Through changing the bandwidth of low pass filter, realize the analog baseband signal of 1.08GHz bandwidth and 540MHz bandwidth is switched, thereby make transceiver can handle the signal of two kinds of bandwidth.
Above-described specific embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely specific embodiment of the present invention; Be not limited to the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Direct Conversion transceiver that is used for the 60GHz radio communication is characterized in that, this Direct Conversion transceiver comprises:
The analog to digital converter (11) of 59 to the 64GHz antennas (1) that are connected in series successively, 59 to 64GHz band pass filters (2), 59 to 64GHz switches (3), 59 to 64GHz low noise amplifiers (4), 59 to 64GHz demodulators (5), reception 1.08GHz and 540MHz bandwidth varying low pass filter (6), reception 1.08GHz and 540MHz bandwidth varying and gain amplifier (7) and 2.16Gsps sample rate;
The digital to analog converter (12) of the 2.16Gsps sample rate that is connected in series successively, emission 1.08GHz and 540MHz bandwidth varying and gain amplifier (14), emission 1.08GHz and 540MHz bandwidth varying low pass filter (13), 59 to 64GHz modulators (9) and 59 to 64GHz power amplifiers (10), and 59 to 64GHz power amplifiers (10) also are connected in 59 to 64GHz switches (3); And
Be connected to 59 to 64GHz frequency synthesizers (8) of 59 to 64GHz demodulators (5) and 59 to 64GHz modulators (9).
2. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 1; It is characterized in that the analog to digital converter (11) of said 59 to 64GHz antennas (1), 59 to 64GHz band pass filters (2), 59 to 64GHz switches (3), 59 to 64GHz low noise amplifiers (4), 59 to 64GHz demodulators (5), reception 1.08GHz and 540MHz bandwidth varying low pass filter (6), reception 1.08GHz and 540MHz bandwidth varying and gain amplifier (7), 2.16Gsps sample rate and 59 to 64GHz frequency synthesizers (8) constitute the reception link.
3. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 2; It is characterized in that; Receive in the link at this; 59 to 64GHz wireless signal at first passes through said 59 to 64GHz antennas (1) and receives, and removes outside the band through said 59 to 64GHz band pass filters (2) and disturbs, and inputs to said 59 to 64GHz low noise amplifiers (4) behind the control selective reception path through said 59 to 64GHz switches (3) and amplifies; Amplifying signal inputs to said 59 to 64GHz demodulators (5); RF input port as said 59 to 64GHz demodulators (5); Simultaneously the local oscillator port of local oscillation signal to said 59 to 64GHz demodulators (5) is provided by said 59 to 64GHz frequency synthesizers (8); Through after the down-conversion radiofrequency signal is converted to analog baseband signal, after the down-conversion one tunnel radiofrequency signal frequency conversion is handled for the IQ two-way; Analog baseband signal inputs to said reception 1.08GHz and 540MHz bandwidth varying low pass filter (6) carries out filtering; The output of said reception 1.08GHz and 540MHz bandwidth varying low pass filter (6) offers the analog to digital converter (11) that signal that said reception 1.08GHz and 540MHz bandwidth varying and gain amplifier (7) be amplified to 0dBm offers said 2.16Gsps sample rate afterwards and samples; Wherein said reception 1.08GHz and 540MHz bandwidth varying low pass filter (6) and said receive 1.08GHz and 540MHz bandwidth varying and gain amplifier (7) according to actual reception to signal bandwidth switch; When antenna 1 receives 2.16GHz bandwidth RF signal, select the 1.08GHz bandwidth, when said 59 to 64GHz antennas (1) receive 1.08GHz bandwidth RF signal, select the 540MHz bandwidth.
4. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 1; It is characterized in that the digital to analog converter of said 2.16Gsps sample rate (12), emission 1.08GHz and 540MHz bandwidth varying and gain amplifier (14), emission 1.08GHz and 540MHz bandwidth varying low pass filter (13), 59 to 64GHz modulators (9) and 59 to 64GHz power amplifiers (10), 59 to 64GHz switches (3), 59 to 64GHz band pass filters (2), 59 to 64GHz antennas (1) and 59 to 64GHz frequency synthesizers (8) constitute transmitting chain.
5. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 4; It is characterized in that; In this transmitting chain; Digital baseband signal converts analog baseband signal into through the digital to analog converter (12) of said 2.16Gsps sample rate; At first input to said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier (14) amplifies; And its Gain Adjustable joint, amplified signal said emission 1.08GHz of input and 540MHz bandwidth varying low pass filter (13) carry out filtering, and the bandwidth of said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier (14) and said emission 1.08GHz and 540MHz bandwidth varying low pass filter (13) is regulated according to system's actual transmit signal; When the emission 2.16GHz of system bandwidth signal, select bandwidth 1.08GHz, when the emission 1.08GHz of system bandwidth signal, select bandwidth 540MHz; Import the intermediate frequency input port of said 59 to 64GHz modulators (9) subsequently; The local oscillator port of said 59 to 64GHz modulators (9) is provided by said 59 to 64GHz frequency synthesizers (8); IQ two paths of signals through after the up-conversion adds up to one road signal and inputs to said 59 to 64GHz power amplifiers (10); Said 59 to 64GHz power amplifiers (10) export said 59 to 64GHz switches (3) to and select the emission path, launch through getting into said 59 to 64GHz antennas (1) after the filtering outside said 59 to the 64GHz band pass filters (2) of entering are with behind the switch.
6. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 1; It is characterized in that; This Direct Conversion transceiver adopts the method for single-conversion, and direct radiofrequency signal with 59 to 64GHz is converted to 0 to 1.08GHz and 0 to 540MHz analog baseband signal.
7. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 1; It is characterized in that said reception 1.08GHz and 540MHz bandwidth varying and gain amplifier (7) and said emission 1.08GHz and 540MHz bandwidth varying and gain amplifier (14) are used between 1.08GHz bandwidth and 540MHz bandwidth, switching.
8. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 1; It is characterized in that said reception 1.08GHz and 540MHz bandwidth varying low pass filter (6) and said emission 1.08GHz and 540MHz bandwidth varying low pass filter (13) are used between 1.08GHz bandwidth and 540MHz bandwidth, switching.
9. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 1 is characterized in that, this Direct Conversion transceiver adopts the local frequency that equates with radio-frequency carrier, makes signal directly be converted to ABB from carrier wave.
10. the Direct Conversion transceiver that is used for the 60GHz radio communication according to claim 1; It is characterized in that; This Direct Conversion transceiver is through changing the bandwidth of variable gain amplifier; Realization is switched the analog baseband signal of 1.08GHz bandwidth and 540MHz bandwidth, thereby makes transceiver can handle the signal of two kinds of bandwidth; Through changing the bandwidth of low pass filter, realize the analog baseband signal of 1.08GHz bandwidth and 540MHz bandwidth is switched, thereby make transceiver can handle the signal of two kinds of bandwidth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100231892A CN102611475A (en) | 2011-01-20 | 2011-01-20 | Direct variable-frequency transmitter-receiver for 60 GHz wireless communication |
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| CN2011100231892A CN102611475A (en) | 2011-01-20 | 2011-01-20 | Direct variable-frequency transmitter-receiver for 60 GHz wireless communication |
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Cited By (8)
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| CN103117768A (en) * | 2013-01-25 | 2013-05-22 | 中国科学院微电子研究所 | Wireless transceiving device |
| CN104852750A (en) * | 2015-04-20 | 2015-08-19 | 国家无线电监测中心陕西监测站 | Data stream processing circuit used for short wave positioning |
| CN105577219A (en) * | 2014-10-10 | 2016-05-11 | 中国科学院上海高等研究院 | Broadband transceiver used for wired coaxial Ethernet |
| CN106941365A (en) * | 2017-04-12 | 2017-07-11 | 电子科技大学 | A kind of multi-standard full duplex Direct Conversion formula transceiver |
| CN108123724A (en) * | 2017-12-22 | 2018-06-05 | 西安烽火电子科技有限责任公司 | A kind of communication system based on shortwave narrowband waveform |
| CN108736909A (en) * | 2018-05-09 | 2018-11-02 | 深圳市盛路物联通讯技术有限公司 | The radio circuit and terminal of SAW filter combination anti aliasing purposes filter |
| CN109361409A (en) * | 2018-12-05 | 2019-02-19 | 京信通信系统（中国）有限公司 | A kind of radio frequency system of effective optimization noise coefficient |
| CN111835372A (en) * | 2019-04-18 | 2020-10-27 | 北京小米移动软件有限公司 | Radio frequency circuit and wireless communication equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104852750A (en) * | 2015-04-20 | 2015-08-19 | 国家无线电监测中心陕西监测站 | Data stream processing circuit used for short wave positioning |
| CN106941365A (en) * | 2017-04-12 | 2017-07-11 | 电子科技大学 | A kind of multi-standard full duplex Direct Conversion formula transceiver |
| CN108123724A (en) * | 2017-12-22 | 2018-06-05 | 西安烽火电子科技有限责任公司 | A kind of communication system based on shortwave narrowband waveform |
| CN108736909A (en) * | 2018-05-09 | 2018-11-02 | 深圳市盛路物联通讯技术有限公司 | The radio circuit and terminal of SAW filter combination anti aliasing purposes filter |
| CN109361409A (en) * | 2018-12-05 | 2019-02-19 | 京信通信系统（中国）有限公司 | A kind of radio frequency system of effective optimization noise coefficient |
| CN111835372A (en) * | 2019-04-18 | 2020-10-27 | 北京小米移动软件有限公司 | Radio frequency circuit and wireless communication equipment |
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Application publication date: 20120725 |