CN1133281C - Transceiver - Google Patents
Transceiver Download PDFInfo
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- CN1133281C CN1133281C CN00125885A CN00125885A CN1133281C CN 1133281 C CN1133281 C CN 1133281C CN 00125885 A CN00125885 A CN 00125885A CN 00125885 A CN00125885 A CN 00125885A CN 1133281 C CN1133281 C CN 1133281C
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- frequency
- radio
- receiving
- intermediate frequency
- local oscillator
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Abstract
The present invention relates to a transceiver, particularly to a reception and transmission technology which receives and transmits intermediate frequency and alien frequency in a TDD mode. The present invention comprises a reception and transmission radio frequency processing circuit, a radio frequency mixer, a reception and transmission high and intermediate frequency processing circuit, an intermediate frequency mixer, a low and intermediate frequency reception processing circuit, an IQ modulator and a radio frequency local oscillation source which are connected sequentially, wherein the radio frequency local oscillation source is connected with the radio frequency mixer, and the IQ modulator is connected with the reception and transmission high and intermediate frequency processing circuit. The intermediate frequency local oscillation source provides required local frequency for the IQ modulator and the intermediate frequency mixer. The present invention can realize the same interface in the air, and intermediate frequency and alien frequency are received and transmitted in the transceiver. Thus, the circuit is simplified, the power consumption and the cost are reduced, the reliability of the transceiver is improved, and the transceiver is miniaturized.
Description
The present invention relates to the transmit-receive technology of the transmitting-receiving intermediate frequency alien frequencies of a kind of time division duplex (to call TDD in the following text) working method.
Now in conjunction with the realization principle of the base station of Fig. 1 brief description existing TDD working method:
Among Fig. 1, the transmitting-receiving rf processing circuitry is finished the filtering and the low noise amplification of receiving front end and is reached rf filtering and the power amplification of sending out; Radio-frequency (RF) mixer is finished the down-conversion of receipts and the up-conversion of sending out; The radio-frequency (RF) local oscillator source is for realizing the time slot frequency hopping of TDD mode, two radio-frequency (RF) local oscillator sources of adopting table tennis to switch; Receive and dispatch high processing circuitry of intermediate frequency, finish the filtering and the amplification of the high intermediate frequency of transmitting-receiving; Intermediate frequency mixer is realized the frequency translation that transmitting-receiving requires; The intermediate frequency local oscillator source provides intermediate frequency mixer required local frequency; Receive the Low Medium Frequency treatment circuit, finish the filtering and the amplification of receiving Low Medium Frequency; Send out the Low Medium Frequency treatment circuit, finish filtering and the amplification of sending out Low Medium Frequency; The IQ modulator is finished the modulation of baseband I Q; The modulation local vibration source is for the IQ modulator provides required modulation local frequency.
Therefrom as can be seen: for the base station of traditional TDD work, R-T unit adopts double conversion usually.Because two intermediate frequencies of sending and receiving are identical, the IQ signal that is produced by base band is at first finished by base band to the signal transformation of sending out first intermediate frequency by baseband I Q modulator like this, the intermediate frequency mixer that needs the additional modulation local vibration source like this and send out the Low Medium Frequency treatment circuit and realize sending out, therefore be unfavorable for reducing base station power consumption and cost, complex circuit designs also is unfavorable for the miniaturization of equipment.Especially more unfavorable to the small-sized transceiver that will realize the far-end power supply.R-T unit realizes that aloft interface is identical, and the mode that can receive and dispatch the intermediate frequency alien frequencies in inside makes circuit obtain simplifying, and reduces power consumption and cost, realizes the miniaturization of equipment.
For realizing purpose of the present invention, adopted following technical scheme:
The present invention includes the transmitting-receiving rf processing circuitry that links to each other in turn, finish the filtering and the low noise amplification of receiving front end and reach rf filtering and the power amplification of sending out; Radio-frequency (RF) mixer, the down-conversion of finishing receipts reaches the up-conversion of sending out, and realization transmitting-receiving radio frequency is the intermediate frequency alien frequencies with frequency; Receive and dispatch high processing circuitry of intermediate frequency, finish the filtering and the amplification of the high intermediate frequency of transmitting-receiving; Intermediate frequency mixer realizes receiving the frequency translation that requires; Receive the Low Medium Frequency treatment circuit, finish the filtering and the amplification of receiving Low Medium Frequency; With the IQ modulator that the high processing circuitry of intermediate frequency of transmitting-receiving links to each other, finish modulation and the frequency translation of baseband I Q; The intermediate frequency local oscillator source is for described IQ modulator and described intermediate frequency mixer provide required local frequency; The radio-frequency (RF) local oscillator source that links to each other with radio-frequency (RF) mixer is for realizing the time slot frequency hopping of TDD mode, two radio-frequency (RF) local oscillator sources of adopting table tennis to switch.When realizing TDD time slot frequency hopping, it is corresponding one by one with the required frequency of sending and receiving state to make base band give the frequency control word in two radio-frequency (RF) local oscillator sources that table tennis switches, can finish the switching in sending and receiving radio-frequency (RF) local oscillator source, thereby the frequency that realizes air interface is identical.
By the R-T unit of time division duplex working method provided by the invention, can realize aloft that interface is identical, and inner at R-T unit for receiving and dispatching the intermediate frequency alien frequencies, thereby simplification circuit, reduce power consumption and cost, improved the reliability of equipment, and realized the miniaturization of equipment.
Below in conjunction with drawings and Examples, further describe technical scheme of the present invention.
Fig. 1 is the R-T unit theory diagram of existing TDD working method.
Fig. 2 is a R-T unit theory diagram of the present invention.
Fig. 3 realizes a concrete circuit block diagram of implementing of the present invention.
Fig. 4 is for using the block diagram of a transceiver of the present invention.
Fig. 1 is described in the background technology part.
As shown in Figure 2, R-T unit provided by the invention comprises the transmitting-receiving rf processing circuitry 1 that links to each other in turn, finishes the filtering and the low noise amplification of receiving front end and reaches rf filtering and the power amplification of sending out; Radio-frequency (RF) mixer 2 is finished the down-conversion of receipts and the up-conversion of sending out; Receive and dispatch high processing circuitry of intermediate frequency 4, finish the filtering and the amplification of the high intermediate frequency of transmitting-receiving; Intermediate frequency mixer 5 realizes receiving the frequency translation that requires; Receive Low Medium Frequency treatment circuit 7, finish the filtering and the amplification of receiving Low Medium Frequency; With the IQ modulator 9 that the high processing circuitry of intermediate frequency 4 of transmitting-receiving links to each other, finish modulation and the frequency translation of baseband I Q; Intermediate frequency local oscillator source 6 is for described IQ modulator 9 and described intermediate frequency mixer 5 provide required local frequency; The radio-frequency (RF) local oscillator source 3 that links to each other with radio-frequency (RF) mixer 2, the first radio-frequency (RF) local oscillator source and the second radio-frequency (RF) local oscillator source of adopting table tennis to switch cooperate with the radio-frequency (RF) local oscillator commutation circuit, have realized the time slot frequency hopping of TDD mode.When realizing TDD time slot frequency hopping, the frequency control word of giving two radio-frequency (RF) local oscillator sources by base band is corresponding one by one with the required frequency of sending and receiving state, thereby finish the switching of the rf frequency of sending and receiving local vibration source, realize that finally the frequency of air interface is identical.
Be to realize a concrete circuit block diagram of implementing of the present invention as shown in Figure 3, comprise the radio frequency application-specific integrated circuit 301 that links to each other in turn, multi-functional translation circuit 304, be serially connected in Surface Acoustic Wave Filter (to call SAW in the following text) 305, first amplifier 306, first match circuit 307 between described multi-functional translation circuit 304 and the intermediate frequency application-specific integrated circuit 308 successively, finish the high intermediate frequency process of receipts; Be serially connected in second amplifier 312, second match circuit 311, filter circuit 310 between described multi-functional translation circuit 304 and the intermediate frequency application-specific integrated circuit 308 successively, finish the high intermediate frequency process of sending out; In the present invention, two radio-frequency (RF) local oscillator sources that utilize traditional TDD working method when realizing that the different time-gap frequency is switched fast, to adopt table tennis to switch, special-purpose radio-frequency IC 301 that selects for use and intermediate frequency IC 308, send number setting when utilizing the combination of radio frequency IC 301 and intermediate frequency IC 308 and frequency hopping, thereby the realization low-power consumption, the transmitting-receiving scheme of the TDD working method of miniaturization.
Described radio frequency application-specific integrated circuit 301, just can finish the low noise of receiving front end by the radio-frequency filter of external a small amount of biasing circuit, match circuit and used frequency range amplifies, filtering, down-conversion and the up-conversion of sending out, filtering and power amplifier prime drive amplifies, the power control function that provides of this device is highly susceptible to realizing the quick switching of receiving and dispatching simultaneously, and low level local vibration source demand, can save necessary vibration magnifier of traditional scheme, be easy to the requirement that the realization system suppresses local oscillator again.The function that described radio frequency application-specific integrated circuit 301 and peripheral circuit thereof are finished is equivalent to the function that transmitting-receiving rf processing circuitry 1 and radio-frequency (RF) mixer 2 are finished among Fig. 2.
Wherein the frequency conversion that realizes is closed and is:
F
RF-F
RFLO=IF
HR→ radio frequency application-specific integrated circuit is finished accepts frequency conversion;
IF
HT+ f
RFLO=F
RFThe up-conversion that → radio frequency application-specific integrated circuit is finished;
Radio-frequency (RF) local oscillator source 3 comprises radio-frequency (RF) local oscillator source commutation circuit 302, finishes the switching in two radio-frequency (RF) local oscillator sources, also comprises two identical radio-frequency (RF) local oscillator sources 303, and the frequency of mainly finishing TDD working method different time-gap is switched; Because the frequency hopping of different time-gap requires local vibration source to want quick lock in, common local vibration source locking is generally the hundreds of microsecond, do not satisfy the locking requirement in the 10 μ s, so adopt two identical phase locked sources, making each local vibration source carry previous time slot prepares, switch with switch then, thereby satisfy the quick saltus step of rf frequency.The control signal of now establishing the local oscillator commutation circuit is SEL, (when being high level) commutation circuit is connected to radio frequency application-specific integrated circuit 301 with the output in the first radio-frequency (RF) local oscillator source when SEL=1, and (when being low level) is connected to radio frequency application-specific integrated circuit 301 with the output in the second radio-frequency (RF) local oscillator source when SEL=0.The present invention has utilized these two identical phase locked sources just when realizing TDD time slot frequency hopping, finish the switching in transmitting-receiving radio-frequency (RF) local oscillator source, thereby the frequency that has realized air interface is identical.And in traditional time slot frequency was switched, the frequency control word of giving two radio-frequency (RF) local oscillator sources was identical corresponding to receiving with the state of sending out.In the present invention, as long as make the frequency control word of giving these two radio-frequency (RF) local oscillator sources corresponding one by one, just can finish the conversion in transmitting-receiving radio-frequency (RF) local oscillator source with the required frequency of sending and receiving state.
Described multi-functional translation circuit 304 is used to finish the function that single two conversion, impedance conversion, receiving and transmitting signal separate;
Described SAW filter 305 is mainly used in the out of band signal that suppresses receipts;
Described first amplifier 306 is used to satisfy the gain requirement of whole passage, should select the single tube amplifier for use with circuit, and is lower than monolithic integrated amplifier power consumption under the prerequisite that realizes said function, low price;
Described first match circuit 307 is used to realize the coupling to special-purpose intermediate frequency IC collection of letters input;
Described special-purpose intermediate frequency IC 308, external a spot of biasing circuit, the intermediate-frequency filter of match circuit and special use is with the intermediate frequency local oscillator source, can finish the double conversion of receipts, filtering, the amplitude limit of high-gain amplifies and collection of letters field intensity indication (RSSI) signal extraction, thereby provide intermediate-freuqncy signal and collection of letters field intensity indication (RSSI) signal of appropriate level for base band, also can finish IQ modulation and the variable gain sent out simultaneously amplifies, and utilize the gain control end that provides in the sheet to realize adjusting to the power of posting a letter, this device inside has power control function equally, can accept the transmitting-receiving control that its base band provides in the lump with the radio frequency application-specific integrated circuit, realize the quick switching of transmitting-receiving.A receipts IF interface and an IQ interface that the present invention utilizes this device to provide just utilize same intermediate frequency local oscillator source to realize the modulation of IQ, thereby have saved special-purpose IQ modulation circuit, again in conjunction with above-mentioned a series of controls, have realized the transmission-receiving function of intermediate frequency alien frequencies.The function that described special-purpose intermediate frequency IC308 is finished be Fig. 2 intermediate frequency mixer 5, receive the function that Low Medium Frequency treatment circuit 7, IQ modulator 9 are finished.
Wherein the frequency conversion that realizes is closed and is:
IF
HR-f
IFLO=IF
RThe receipts double conversion that → intermediate frequency application-specific integrated circuit is finished;
IF
HT=f
IFLDThe IQ that sends out that → intermediate frequency application-specific integrated circuit is finished modulates;
Intermediate frequency local oscillator source 309 is for intermediate frequency application-specific integrated circuit 308 provides the intermediate frequency local oscillator frequency;
More clear for the frequency relation that makes whole proposal, the frequency translation that now provides whole proposal concerns:
F
RF-F
RFLO=I
FHRThe down-conversion that → radio frequency application-specific integrated circuit is finished;
F
RF=IF
HT+ f
RFLOThe up-conversion that → radio frequency application-specific integrated circuit is finished;
IF
HR-f
IFLO=I
FRThe receipts double conversion that → intermediate frequency application-specific integrated circuit is finished;
IF
HT=f
IFLOThe IQ modulation that → intermediate frequency application-specific integrated circuit is finished; F wherein
RFThe expression air frequencies, f
RFLOExpression radio-frequency (RF) local oscillator source frequency, IF
HRAn intermediate frequency, IF are received in expression
HTIntermediate frequency, f are sent out in expression
IFLOExpression intermediate frequency local oscillator source frequency, IF
RTwo intermediate frequencies are received in expression.This shows: frequency ratio is received low one an of intermediate frequency and is received two intermediate frequency value in sending out, and two intermediate frequency value are received than high one of the frequency that provides for receipts just for the local vibration source that provides is provided in the radio-frequency (RF) local oscillator source.Realized that promptly the intermediate frequency in R-T unit inside is an alien frequencies, and the frequency of air interface is identical.
Fig. 4 is for using the theory diagram of a transceiver of the present invention.Among the figure:
401 expressions, the first special-purpose radio-frequency filter;
402 expressions R-T unit of the present invention;
403 expression one chip amplifiers;
404 expressions, the second special-purpose radio-frequency filter;
405 expression power amplifiers;
406 expressions the 3rd radio frequency filter;
Behind the first special-purpose radio-frequency filter 401, enter R-T unit 402 of the present invention from the small-signal of receiving antenna, finally send the specific intermediate signal that is fit to Base-Band Processing, and directly enter R-T unit 402 of the present invention by the IQ signal that base band is sent, and send radiofrequency signal with certain power level by it, be amplified into the second special-purpose radio-frequency filter 404 through one chip amplifier 403 again, after filtering, add to the power level that power amplifier 405 is amplified to requirement, and once more by delivering to transmitting antenna after 406 filtering of the 3rd radio frequency filter, so just can realize that reliably air interface is identical, the transceiver scheme of transmitting-receiving intermediate frequency alien frequencies with simple circuit.
Claims (3)
1, a kind of R-T unit comprises the transmitting-receiving rf processing circuitry (1) that links to each other in turn, finishes the filtering and the low noise amplification of receiving front end and reaches rf filtering and the power amplification of sending out; Radio-frequency (RF) mixer (2), the down-conversion of finishing receipts reaches the up-conversion of sending out, and realization transmitting-receiving radio frequency is the intermediate frequency alien frequencies with frequency; Receive and dispatch high processing circuitry of intermediate frequency (4), finish the filtering and the amplification of the high intermediate frequency of transmitting-receiving; Intermediate frequency mixer (5) realizes receiving the frequency translation that requires; Receive Low Medium Frequency treatment circuit (7), finish the filtering and the amplification of receiving Low Medium Frequency; With the IQ modulator (9) that the high processing circuitry of intermediate frequency of transmitting-receiving (4) links to each other, finish modulation and the frequency translation of baseband I Q; Intermediate frequency local oscillator source (6) is for described IQ modulator (9) and described intermediate frequency mixer (5) provide required local frequency; The radio-frequency (RF) local oscillator source (3) that links to each other with radio-frequency (RF) mixer (2), the time slot frequency hopping of realization TDD mode.
2, a kind of R-T unit according to claim 1, it is characterized in that: described radio-frequency (RF) local oscillator source (3) comprises radio-frequency (RF) local oscillator commutation circuit, two identical first and second radio-frequency (RF) local oscillator sources, each local vibration source is carried previous time slot and is prepared, switch with switch then, thereby satisfy the quick saltus step of rf frequency.
3, a kind of R-T unit according to claim 1 and 2, it is characterized in that: described radio-frequency (RF) local oscillator source (3) is that to give the frequency control word in the first radio-frequency (RF) local oscillator source and the second radio-frequency (RF) local oscillator source by base band corresponding one by one with the required frequency of sending and receiving state, finish the switching of the rf frequency of sending and receiving local vibration source when realizing TDD time slot frequency hopping, realize that finally the frequency of air interface is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00125885A CN1133281C (en) | 2000-10-24 | 2000-10-24 | Transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00125885A CN1133281C (en) | 2000-10-24 | 2000-10-24 | Transceiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1350370A CN1350370A (en) | 2002-05-22 |
| CN1133281C true CN1133281C (en) | 2003-12-31 |
Family
ID=4591667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00125885A Expired - Fee Related CN1133281C (en) | 2000-10-24 | 2000-10-24 | Transceiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1133281C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905087A (en) * | 2012-12-24 | 2014-07-02 | 中国电子科技集团公司第五十研究所 | Broadband frequency-hopping radio frequency receiving system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100417036C (en) * | 2004-04-02 | 2008-09-03 | 大唐移动通信设备有限公司 | Message machine of receiving-transmitting time-division duplex wireless communication system |
| CN1984101B (en) * | 2005-12-13 | 2010-04-21 | 联芯科技有限公司 | Method for aligning receiver I/Q in TDD system and receiver-transmitter platform |
| CN101132382B (en) * | 2006-08-22 | 2012-02-22 | 豪威国际控股有限公司 | Frequency modulation transmitter |
| CN101286761B (en) * | 2007-04-11 | 2011-08-24 | 中兴通讯股份有限公司 | Implementing method for frequency-hopping, device and transceiver thereof |
| CN101686064A (en) * | 2008-09-23 | 2010-03-31 | 国民技术股份有限公司 | Double frequency conversion receiving circuit and method for radio-frequency SIM card |
| CN101478320A (en) * | 2008-11-17 | 2009-07-08 | 华为技术有限公司 | Microwave device radio frequency circuit and transmitting and receiving interval regulating method for the circuit |
| US8090327B2 (en) * | 2008-12-02 | 2012-01-03 | Broadcom Corporation | Configurable baseband processing for receiver and transmitter and methods for use therewith |
| CN101877917B (en) * | 2009-04-28 | 2012-09-05 | 电信科学技术研究院 | Remote radio unit |
| CN102684754B (en) * | 2011-03-11 | 2015-05-13 | 赖之安 | Bluetooth transmission module and bluetooth device with same |
| CN103645662B (en) * | 2013-12-09 | 2016-11-02 | 湖南工学院 | For the data acquisition of industrial flow-line and communicator and method |
| CN106093566B (en) * | 2016-05-18 | 2018-10-30 | 中国电子科技集团公司第四十一研究所 | A kind of switch frequency conversion component |
| CN109818596B (en) * | 2019-01-29 | 2021-03-12 | 中国科学院上海微系统与信息技术研究所 | Multi-channel radio frequency signal waveform and phase accurate control circuit |
-
2000
- 2000-10-24 CN CN00125885A patent/CN1133281C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103905087A (en) * | 2012-12-24 | 2014-07-02 | 中国电子科技集团公司第五十研究所 | Broadband frequency-hopping radio frequency receiving system |
| CN103905087B (en) * | 2012-12-24 | 2016-05-04 | 中国电子科技集团公司第五十研究所 | Wide interval frequency hopping radio-frequency receiving system |
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| Publication number | Publication date |
|---|---|
| CN1350370A (en) | 2002-05-22 |
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Owner name: ZTE CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHENZHENG CITY ZTE CO., LTD. |
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Address after: 518057 Department of law, Zhongxing building, South hi tech Industrial Park, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee after: ZTE Corporation Address before: 518057 Department of law, Zhongxing building, South Road, Nanshan District hi tech Industrial Park, Guangdong, Shenzhen Patentee before: Zhongxing Communication Co., Ltd., Shenzhen City |
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Granted publication date: 20031231 Termination date: 20131024 |