CN102457297A - Radio transceiver - Google Patents
Radio transceiver Download PDFInfo
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- CN102457297A CN102457297A CN2010105116716A CN201010511671A CN102457297A CN 102457297 A CN102457297 A CN 102457297A CN 2010105116716 A CN2010105116716 A CN 2010105116716A CN 201010511671 A CN201010511671 A CN 201010511671A CN 102457297 A CN102457297 A CN 102457297A
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Abstract
The invention relates to the communication technology field, more particularly to a radio transceiver that is compatible with a TD-LTE frequency range of 2.3 to 2.4 GHz and is oriented to an IMT-Advanced frequency range of 3.4 to 3.6 GHz. The radio transceiver comprises: an antenna module, which is used for receiving and transmitting a signal; a switch, which is used for completing switching between a transmitting link and a reception link; a frequency synthesizer, which is used for providing a local oscillator signal; the reception link, which is used for dividing a received radio frequency signal into two paths of signals, carrying out mixing respectively on the two paths of signals and the local oscillator signal provided by the frequency synthesizer, carrying out down conversion processing and then providing the processed signals for a base band to carry out digital signal processing; the transmitting link, which is used for carrying out mixing on two paths of base band signals and the local oscillator signal provided by the frequency synthesizer, carrying out up conversion processing, generating two paths of emitted radio frequency signals that are combined into one path of signal and then carrying out power amplification. According to the invention, receiving and sending of wireless signals can be realized; and control on a gain, frequency, a bandwidth, time division multiplex, and transmitting power is contained.
Description
Technical field
The present invention relates to be applied to the transceiver of the 4th third-generation mobile communication IMT-Advanced, be specifically related to a kind of transceiver of compatible TD-LTE 2.3-2.4GHz frequency range towards IMT-Advanced 3.4-3.6GHz frequency range.
Background technology
According to relevant analysis, the demand of mobile communication data business amount increases by 100 times speed fast development with every 6-7.By 2010, will there be the mobile phone more than 60% to have the PDA function that inserts WLAN, but the cell-phone function of the PDA tool access mobile communication net more than 40%.The data business volume of mobile radio communication will reach more than 80%.Estimate 2015, the demand of mobile data services amount will reach present 100-1000 times.In in the past 20 years, International Telecommunication Association is devoted to coordinate the strength of national governments, industry and private sector always, to develop global wideband multimedia international telecommunication system, also is called IMT (International MobileTelecommunications).Since two thousand, begun to be introduced in conceptive first standard family that grows up of IMT.Since in May, 2007, global IMT-2000 user has reached 1,000,000,000 more than." IMT-Advanced " provides a global platform, on this platform, can release various mobile services of future generation--and the rapid data that occurs with breathtaking novel interactive form of service obtains, unified message is handled and business such as wideband multimedia.
Along with (the International Telecommunication Union of International Telecommunications Union; ITU) the formal startup of IMT-Advanced (4G) standardized process, each country, international and domestic standardization body, telecom operators, communications equipment manufacturer, scientific research institutions etc. are all participating in IMT-Advanced system standard formulation work energetically.According to the minimum essential requirement target of ITU to the IMT-Advanced system, IMT-Advanced need realize the data rate of 100Mbps to 1Gbps, and the radio-frequency front-end performance of system is proposed higher requirement.Current, standardization bodies such as 3GPP, 3GPP2, IETF are actively developing towards the work of IMT-Advanced system standardization.But in the world still not to the radio frequency front end chip of IMT-Advanced technology, can't or organize the related key technical that proposes to carry out comprehensively, effectively verify and assess to each country at present, this be unfavorable for effectively carrying out of standardization effort.At this crucial hour; Take the lead in breaking through the country of this bottleneck; Just can walk in the prostatitis of IMT-Advanced (4G) standardization effort, could seize the commanding elevation of this great communications field as early as possible, lay a good foundation for IMT-Advanced (4G) further develops.
Because characteristics such as the broadband of the 4th third-generation mobile communication (4G), many antennas; Brought great challenge for the design of its transceiver; Industrial circle focuses mostly on aspect the transceiver research of LTE at present, and China has also proposed the TD-LTE standard of oneself, and this just needs the transceiver design of a kind of compatible TD-LTE 2.3-2.4GHz of research and development and IMT-Advanced 3.4-3.6GHz frequency range; Shared core circuits such as frequency synthesizer wherein, and realize integrated design and control.
Summary of the invention
The object of the present invention is to provide the transceiver of a kind of IMT-Advanced of satisfying 3.4-3.6GHz frequency range requirement and compatible TD-LTE 2.3-2.4GHz frequency range, can realize the transmitting-receiving of wireless signal.
In order to achieve the above object, the technical scheme of the present invention's employing is: a kind of transceiver comprises:
Anneta module is used for receiving and transmitting;
Switch is used to accomplish transmitting chain and receives the switching between link;
Frequency synthesizer is used to provide local oscillation signal;
Receive link, be used for the radiofrequency signal that receives is divided into two-way, the local oscillation signal mixing that provides with frequency synthesizer is respectively carried out Digital Signal Processing after down-converted offers base band;
Transmitting chain, the local oscillation signal mixing that is used for respectively two-way baseband signal and said frequency synthesizer are provided are after upconversion process, and the radiofrequency signal that produces the two-way emission synthesizes one road signal and carries out power amplification.
In the such scheme, said Anneta module is connected with the transmitting chain selectivity with the reception link through the time division duplex control module.
In the such scheme, said time division duplex control module is come the working frequency range of selective reception link through control signal.
In the such scheme, said reception link comprises:
Band pass filter is used for the filtering base band and disturbs outward;
Low noise amplifier is used for the radiofrequency signal that receives is amplified, and reduces to introduce noise simultaneously;
Low-converter is used for the local oscillation signal that radiofrequency signal and frequency synthesizer provide is converted to I, Q two-way analog baseband signal;
Low pass filter is used for other signals outside the filtering analog baseband signal useful signal;
Variable gain amplifier is used for the signal of low pass filter output is amplified;
Analog to digital converter is used for converting analog baseband signal to digital baseband signal;
The working frequency range of said reception link is 2.3-2.4GHz or 3.4-3.6GHz, and the working frequency range of said band pass filter and said low noise amplifier is corresponding with the working frequency range that receives link.
In the such scheme, said time division duplex control module is selected the working frequency range of transmitting chain through control signal.
In the such scheme, said transmitting chain comprises:
Digital to analog converter is used for converting digital baseband signal to analog baseband signal;
Variable gain amplifier is used for analog baseband signal is amplified;
Low pass filter is used for other signals outside the filtering analog baseband signal useful signal;
Upconverter is used for the local oscillation signal that the signal after the filtering and frequency synthesizer provide is carried out frequency conversion, and I, Q two paths of signals synthesize one road signal after the frequency conversion;
Power driving amplifier is used for signal power is driven amplification;
Band pass filter is used for the filtering base band and disturbs outward;
Power amplifier is used for filtered signal is amplified to the power of system requirements;
The working frequency range of said transmitting chain is 2.3-2.4GHz or 3.4-3.6GHz, and the working frequency range of said power driving amplifier and said band pass filter is corresponding with the working frequency range of transmitting chain.
In the such scheme; Said transceiver also comprises frequency synthesizer, said frequency synthesizer through voltage controlled oscillator (VCO) and frequency divider produce 2.3-2.4GHz or and the local oscillation signal of 3.4-3.6GHz operating frequency for receiving the use of link down-conversion and transmitting chain up-conversion.
In the such scheme, said transceiver also comprises power mode control module (PMC), is used for the operating state of control power amplifiers (PA), regulates the transmission power level of transmitting chain, satisfies the demand of different distance communication.
In the such scheme, said transceiver also comprises the DC maladjustment calibration module, is used for after low-converter and upconverter output, carrying out the digital calibration of DC quantity.
In the such scheme, said transceiver also comprises automatic gain control module (AGC), is used to control the gain of low noise amplifier (LNA), variable gain amplifier (PGA) and power driving amplifier (PA Driver) and regulate.
In the such scheme, said transceiver also comprises automatic frequency control module (AFC), is used to change the frequency dividing ratio of frequency synthesizer, realizes frequency hopping and frequency calibration.
Compared with prior art, the beneficial effect of technical scheme generation of the present invention is following:
Transceiver of the present invention satisfies IMT-Advanced 3.4-3.6GHz frequency range and requires and compatible TD-LTE 2.3-2.4GHz frequency range, can realize the transmitting-receiving of wireless signal, and comprise the control of gain, frequency, bandwidth, time division multiplexing and transmitting power.
Description of drawings
The structured flowchart of the transceiver that Fig. 1 provides for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment technical scheme of the present invention is described in detail.
Referring to Fig. 1, the present invention provides a kind of transceiver, comprising:
Anneta module is used for receiving and transmitting;
Switch is used to accomplish transmitting chain and receives the switching between link;
Frequency synthesizer is used to provide local oscillation signal;
Receive link, be used for the radiofrequency signal that receives is divided into two-way, the local oscillation signal mixing that provides with frequency synthesizer is respectively carried out Digital Signal Processing after down-converted offers base band;
Transmitting chain, the local oscillation signal mixing that is used for respectively two-way baseband signal and said frequency synthesizer are provided are after upconversion process, and the radiofrequency signal that produces the two-way emission synthesizes one road signal and carries out power amplification.
Receive link and transmitting chain and be two-way, two-way is realized identical on hardware, therefore here only the embodiment that receives link RX1 and transmitting chain TX1 is set forth.
Receive link at RX1; Wireless signal at first receives through antenna, selects the 2.3-2.4GHz frequency range to receive or the reception of 3.4-3.6GHz frequency range through the control of switch, is band pass filter after the switch; Signal disturbs outward with the filtering band through the band pass filter (BPF) of relevant work frequency range; Filtered signal inputs to low noise amplifier (LNA) and amplifies, and introduces as far as possible little noise simultaneously; Amplifying signal inputs to low-converter (Down converter), as its rf inputs mouth, by frequency synthesizer the local oscillator port of local oscillation signal to low-converter is provided simultaneously, is converted to I, Q two-way analog baseband signal through radiofrequency signal after the down-conversion; Analog baseband signal inputs to low pass filter (LPF) and carries out filtering; Other signals outside its useful signal of filtering; The output of filter offers variable gain amplifier (PGA) and is amplified to and offers analog to digital converter (ADC) after the signal about 0dBm and sample, and obtains digital signal.Described low-converter is characterized in that comprising two input ports and an output port, is respectively rf inputs mouth and local oscillator input port and down-conversion output port.
At the TX1 transmitting chain; Digital baseband signal converts analog baseband signal into through digital to analog converter (DAC); Analog baseband signal inputs to variable gain amplifier (PGA) and amplifies, and its gain can regulate, and the signal input low pass filter (LPF) after the amplification carries out filtering; The intermediate frequency input port of filtered signal input upconverter (Up converter); The local oscillator input end signal of upconverter is provided by frequency synthesizer, and I, the Q two paths of signals after the process up-conversion synthesizes one road signal and input to the power driving amplifier (PA Driver) of relevant work frequency range, inputs to band pass filter (BPF) again and is with outer filtering; Signal after the filtering inputs to the power of power amplifier (PA) with power amplification to system requirements, and power amplifier connects switch and launches and be connected to antenna after the selection and launch.
Also comprise time division duplex control module (Time Division DuplexingControl), power mode control module (Power Mode Control), DC maladjustment correction module (DCoffset Calibration), automatic gain control module (AGC), automatic frequency control module (AFC) and auto-bandwidth control module (ABC) in the present invention, thereby realized complete time-division radio transmission-receiving function.
The time division duplex control module is the wide-band microwave switch that a double-pole eight is thrown, thereby comes the break-make of selector switch to realize time division duplex control through control signal.
Power mode control (PMC) is through the control to the operating state of power amplifier (PA), thereby regulates the transmission power level of transmitter, satisfies the demand of different distance communication.
The local oscillation signal that frequency synthesizer utilizes voltage controlled oscillator (VCO) and frequency divider to produce corresponding frequencies (2.3-2.4GHz and 3.4-3.6GHz) uses for receiving link down-conversion and transmitting chain up-conversion.
The DC maladjustment calibration module improves the DC maladjustment phenomenon of the receiver of Direct Conversion structure through the digital calibration that after frequency mixer output, carries out DC quantity.
Automatic gain control module (AGC) is through regulating the gain of low noise amplifier (LNA), variable gain amplifier (PGA) and power driving amplifier (PADriver), thereby realizes that modulus (AD) input signal keeps function constant and that transmitting power is adjusted according to actual scene.
Automatic frequency control module (AFC) thus be to realize that through the frequency dividing ratio that changes frequency synthesizer carrier frequency switches and real-time frequency self calibration at different interchannels.
Above-described specific embodiment has carried out further explain to the object of the invention, technical scheme and beneficial effect.Will be appreciated that the above content is merely embodiment of the present invention, is not limited to the present invention.All within essence of the present invention and basic 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 transceiver is characterized in that, comprising:
Anneta module is used for receiving and transmitting;
Switch is used to accomplish transmitting chain and receives the switching between link;
Frequency synthesizer is used to provide local oscillation signal;
Receive link, be used for the radiofrequency signal that receives is divided into two-way, the local oscillation signal mixing that provides with frequency synthesizer is respectively carried out Digital Signal Processing after down-converted offers base band;
Transmitting chain, the local oscillation signal mixing that is used for respectively two-way baseband signal and said frequency synthesizer are provided are after upconversion process, and the radiofrequency signal that produces the two-way emission synthesizes one road signal and carries out power amplification.
2. transceiver as claimed in claim 1 is characterized in that: said Anneta module is connected with the transmitting chain selectivity with the reception link through the time division duplex control module.
3. transceiver as claimed in claim 2 is characterized in that: said time division duplex control module is come the working frequency range of selective reception link and transmitting chain through control signal.
4. transceiver as claimed in claim 3 is characterized in that: said reception link comprises:
Band pass filter is used for the filtering base band and disturbs outward;
Low noise amplifier is used for the radiofrequency signal that receives is amplified, and reduces to introduce noise simultaneously;
Low-converter is used for the local oscillation signal that radiofrequency signal and frequency synthesizer provide is converted to I, Q two-way analog baseband signal;
Low pass filter is used for other signals outside the filtering analog baseband signal useful signal;
Variable gain amplifier is used for the signal of low pass filter output is amplified;
Analog to digital converter is used for converting analog baseband signal to digital baseband signal;
The working frequency range of said reception link is 2.3-2.4GHz or 3.4-3.6GHz, and the working frequency range of said band pass filter and said low noise amplifier is corresponding with the working frequency range that receives link.
5. transceiver as claimed in claim 4 is characterized in that: said transmitting chain comprises:
Digital to analog converter is used for converting digital baseband signal to analog baseband signal;
Variable gain amplifier is used for analog baseband signal is amplified;
Low pass filter is used for other signals outside the filtering analog baseband signal useful signal;
Upconverter is used for the local oscillation signal that the signal after the filtering and frequency synthesizer provide is carried out frequency conversion, and I, Q two paths of signals synthesize one road signal after the frequency conversion;
Power driving amplifier is used for signal power is driven amplification;
Band pass filter is used for the filtering base band and disturbs outward;
Power amplifier is used for filtered signal is amplified to the power of system requirements;
The working frequency range of said transmitting chain is 2.3-2.4GHz or 3.4-3.6GHz, and the working frequency range of said power driving amplifier and said band pass filter is corresponding with the working frequency range of transmitting chain.
6. transceiver as claimed in claim 5 is characterized in that: said frequency synthesizer through voltage controlled oscillator (VCO) and frequency divider produce 2.3-2.4GHz or and the local oscillation signal of 3.4-3.6GHz operating frequency for receiving the use of link down-conversion and transmitting chain up-conversion.
7. transceiver as claimed in claim 6; It is characterized in that: said transceiver also comprises power mode control module (PMC); The operating state that is used for control power amplifiers (PA), the transmission power level of adjusting transmitting chain satisfies the demand that different distance is communicated by letter.
8. transceiver as claimed in claim 7 is characterized in that: said transceiver also comprises the DC maladjustment calibration module, is used for after low-converter and upconverter output, carrying out the digital calibration of DC quantity.
9. transceiver as claimed in claim 8; It is characterized in that: said transceiver also comprises automatic gain control module (AGC), is used to control the gain of low noise amplifier (LNA), variable gain amplifier (PGA) and power driving amplifier (PA Driver) and regulate.
10. transceiver as claimed in claim 9 is characterized in that: said transceiver also comprises automatic frequency control module (AFC), is used to change the frequency dividing ratio of frequency synthesizer, realizes frequency hopping and frequency calibration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105116716A CN102457297A (en) | 2010-10-19 | 2010-10-19 | Radio transceiver |
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| CN2010105116716A CN102457297A (en) | 2010-10-19 | 2010-10-19 | Radio transceiver |
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| CN102457297A true CN102457297A (en) | 2012-05-16 |
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| CN2010105116716A Pending CN102457297A (en) | 2010-10-19 | 2010-10-19 | Radio transceiver |
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| CN103095381A (en) * | 2013-01-22 | 2013-05-08 | 长沙五维地科勘察技术有限责任公司 | Underground life calling system |
| CN103259559A (en) * | 2013-05-20 | 2013-08-21 | 成都雷电微力科技有限公司 | W-band receiving and transmitting assembly |
| CN103517458A (en) * | 2013-09-29 | 2014-01-15 | 苏州华士无线科技有限公司 | WIFI long-distance transmission module with double-direction frequency conversion technology |
| CN103812521A (en) * | 2012-11-01 | 2014-05-21 | 联发科技股份有限公司 | Communication system |
| CN104079317A (en) * | 2014-07-21 | 2014-10-01 | 无锡中星微电子有限公司 | Wireless duplexing transceiver |
| CN104270098A (en) * | 2014-10-17 | 2015-01-07 | 成都九华圆通科技发展有限公司 | Microwave broadband down converter |
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| CN103517458A (en) * | 2013-09-29 | 2014-01-15 | 苏州华士无线科技有限公司 | WIFI long-distance transmission module with double-direction frequency conversion technology |
| CN103517458B (en) * | 2013-09-29 | 2017-04-12 | 苏州华士无线科技有限公司 | WIFI long-distance transmission module with double-direction frequency conversion technology |
| CN104079317A (en) * | 2014-07-21 | 2014-10-01 | 无锡中星微电子有限公司 | Wireless duplexing transceiver |
| CN104079317B (en) * | 2014-07-21 | 2016-06-29 | 无锡中感微电子股份有限公司 | wireless duplex transceiver |
| CN104702334A (en) * | 2014-08-11 | 2015-06-10 | 庄昆杰 | TD-LTE (time division-long term evolution) macro base station indoor extension coverage system and TD-LTE small cell radiofrequency front terminal component |
| CN104270098A (en) * | 2014-10-17 | 2015-01-07 | 成都九华圆通科技发展有限公司 | Microwave broadband down converter |
| CN104320155A (en) * | 2014-11-11 | 2015-01-28 | 济南鼎润电子科技有限公司 | Beidou I navigation chip front-end transmit-receive circuit system and work method thereof |
| CN104378136A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院微电子研究所 | Wireless transceiver |
| CN104617966A (en) * | 2014-12-31 | 2015-05-13 | 杭州敦崇科技股份有限公司 | WLAN (wireless local area network) adjacent channel interference resisting device and method thereof |
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