CN101369838A - Apparatus for regulating automatic gain control voltage in diversity reception switch - Google Patents
Apparatus for regulating automatic gain control voltage in diversity reception switch Download PDFInfo
- Publication number
- CN101369838A CN101369838A CNA200710141174XA CN200710141174A CN101369838A CN 101369838 A CN101369838 A CN 101369838A CN A200710141174X A CNA200710141174X A CN A200710141174XA CN 200710141174 A CN200710141174 A CN 200710141174A CN 101369838 A CN101369838 A CN 101369838A
- Authority
- CN
- China
- Prior art keywords
- diversity
- diversity reception
- signal
- control section
- receiving device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A diversity reception apparatus comprises a first tune unit for down-conversion of a received communication signal to an if signal and amplification of the if signal; a second tune unit for down-conversion of a received communication signal to an if signal and amplification of the if signal; a diversity reception control part for switching between a single reception mode and the diversity reception mode according to the received signal quality; and an automatic grain control part for controlling the control voltage supplied for if amplifiers in the first tune unit and the second tune unit.
Description
Technical field
The present invention relates to a kind of signal receiving device, particularly, relate to a kind ofly when between single collection receiving mode and diversity reception pattern, switching, change automatic gain control (AGC) circuit that one tunnel received signal of before not working is handled the gain-controlled voltage of branch automatically
Background technology
In mobile communication system, the electromagnetic wave environment during the reflection that between the pile that stands in great numbers in the city electromagnetic wave is produced causes communicating by letter becomes complicated, and can produce multipath fading to transmission signals.In addition, be accompanied by the high-speed mobile of the vehicles (such as automobile, train), transmission signals is produced Doppler effect and rapid fading.These phenomenons all have a negative impact to the reception that is in the mobile device in the communications status.
In order to overcome multipath fading, Doppler effect and rapid fading, the diversity antenna receiving system has dropped into use.After using the diversity reception antenna, when decline takes place in received signal, the diversity antenna receiving system need be switched between a plurality of diversity antennas, to obtain the strongest received signal, perhaps the received signal of each diversity antenna is synthesized, by digital signal processing algorithm, obtain better reception.
Japanese patent gazette spy opens 2005-171984 (patent documentation 1) and discloses a kind of traditional diversity system.Fig. 6 shows the diversity system of prior art.As shown in Figure 6, this diversity system comprises tuner signal receiving unit 2, received signal quality control section 3, and diversity reception antenna 4,5.
Tuner signal receiving unit 2 comprises tuner circuit 6,7.Received signal quality control section 3 comprises digital demodulator 8,9, diversity reception part 10, error correcting section 11, lead-out terminal 12 and diversity reception control section 13.Diversity reception antenna 4,5 links to each other with tuner circuit 6,7 respectively.Carry out tuning to the signal that diversity reception antenna 4,5 receives respectively by tuner circuit 6,7.Tuner circuit 6,7 is two digital demodulators 8,9 that output to respectively through tuning signal in the received signal quality control section 3.
Antenna 4, tuner 6, digital demodulator 8 constitutes a branch road in signal diversifying reception and the processing; Antenna 5, tuner 7, digital demodulator 9 constitutes another branch road in signal diversifying reception and the processing.Signal by digital demodulator 8,9 demodulation is imported into diversity reception part 10.The output of diversity reception part 10 and error correcting section 11 link to each other with diversity reception control section 13.
When diversity system switches to the diversity reception pattern by single collection receiving mode, provide supply voltage by diversity control section 13 to No. one tuner and the digital demodulator of not working, make it switch to operating state from non operating state.Simultaneously, because the signal that reception antenna receives is strong and weak different, the relative variation of signal strength signal intensity is very big.Guarantee signal within the dynamic range of back-end circuit, need to use automatic gain control (AGC) circuit, according to the power of received signal, control the gain of intermediate frequency amplifier automatically, to keep the stable of output by controlling voltage.
Yet in the prior art, from diversity reception control section 13 output supply voltages, this supply voltage directly offers tuner circuit by the circuit feedback, as the control voltage of the intermediate frequency amplifier that has AGC.A branch of not working in the diversity system in the prior art, reaches stable operating state from starting working need the long time.
In order to address this problem, people have proposed a kind of method, the control voltage that will be in the intermediate frequency amplifier of the tuner circuit in the operating state is directly delivered to the intermediate frequency amplifier of the tuner of not starting working, thereby saves the switching time from single collection receiving mode to the diversity reception pattern.Yet in the reception environment of complexity, the input signal strength of two-way tuner is very different usually, and is especially all the more so in the time must considering the rapid fading that multipath fading and Doppler effect cause.The voltage transfer circuit described in the above-mentioned patent documentation has only duplicated the control voltage of the intermediate frequency amplifier in the first collection receiving circuit, and this has just produced the intermediate frequency amplifier control voltage in the tuner circuit that needs to open and the problem of signal strength signal intensity mismatch.
In addition, existing diversity reception antenna system is to adopt direction diversity mostly.Even two or more correlations be zero and antenna that point to different directions between carry out the switching of received signal or synthetic, reaching the purpose that improves signal strength signal intensity, but the direction diversity antenna is to the not improvement of rapid fading of crest value blank signal 1/4 wavelength that produces owing to the receiving terminal high-speed mobile.
Summary of the invention
The purpose of this invention is to provide a kind of diversity receiving device, can be when collection receives more than Dan Ji switched to, intensity distribution AGC control voltage according to received signal, make AGC reach optimum Working sooner, and the reception antenna by configuration certain intervals distance improves the rapid fading influence of intensity to received signal.
According to an aspect of the present invention, provide a kind of diversity receiving device, comprising: first tuned cell is used for the signal of communication that receives is downconverted into intermediate-freuqncy signal, and intermediate-freuqncy signal is amplified; Second tuned cell is used for the signal of communication that receives is downconverted into intermediate-freuqncy signal, and intermediate-freuqncy signal is amplified; The diversity reception control section is used for the quality according to received signal, switches between single collection receiving mode and diversity reception pattern; With the automatic gain control section, be used for controlling the control voltage of the intermediate frequency amplifier that offers described first tuned cell and described second tuned cell.
According to another aspect of the present invention, provide a kind of control method of diversity reception, comprise step: the signal quality according to the signal of communication that receives determines whether to switch to the diversity reception pattern from single collection receiving mode; When single collection receiving mode switches to the diversity reception pattern, starting the intermediate frequency amplifier of automatic gain control section in first and second tuned cells provides branch pressure-controlled voltage.
Description of drawings
By below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 is the block diagram that shows according to the diversity receiving device of the embodiment of the invention;
Fig. 2 a is the schematic diagram of the explanation degraded signal quality that rapid fading causes when the receiving terminal high-speed mobile;
Fig. 2 b shows the schematic diagram that carries out the strength relationship of diversity switching time stage reception antenna signal because of rapid fading;
Fig. 3 is the flow chart of demonstration according to the operation of the diversity receiving device of the embodiment of the invention;
Fig. 4 shows the schematic diagram that concerns between AGC control voltage and the received signal intensity;
Fig. 5 is the structural representation that shows according to the control of the AGC in the diversity receiving device of the present invention voltage branch circuit; With
Fig. 6 is the block diagram that shows the diversity antenna receiver of prior art.
Embodiment
With reference to the accompanying drawings embodiments of the invention are elaborated, having omitted in the description process is unnecessary details and function for the present invention, obscures to prevent that the understanding of the present invention from causing.
The preferred embodiments of the present invention are described with reference to the drawings.Here adopt the diversity type mobile TV receiver as specific embodiment.Be noted that receiver of the present invention is not limited thereto, but go for range of application widely.
As shown in Figure 1, mainly form, comprise diversity reception antenna 37,38, tuner 21 and received signal quality control section 22 by three parts according to the diversity receiver of present embodiment. Diversity reception antenna 37,38 is used for received signal.Tuner 21 comprises the tuned cell 31 and 32 that links to each other with two diversity antennas 37,38 respectively, and they can be the receivers of super-heterodyne architecture, and function and structure are identical.Tuned cell 31 can be used as first tuned cell; Tuned cell 32 can be used as second tuned cell.Tuned cell 31 is by radio frequency amplifier 51, frequency mixer 52, and intermediate-frequency filter 53, intermediate frequency amplifier 54 constitutes, and oscillator 55 provides reference frequency to frequency mixer 52.The output of frequency mixer 52 links to each other with radio frequency amplifier 51 by radio frequency AGC controller 56, has added ground capacity 56a in this feedback loop, makes its change in voltage more level and smooth.Equally, tuned cell 32 is by radio frequency amplifier 61, frequency mixer 62, and intermediate-frequency filter 63, intermediate frequency amplifier 64 constitutes, and oscillator 65 provides reference frequency to frequency mixer 62.The output of frequency mixer 62 links to each other with radio frequency amplifier 61 by radio frequency AGC controller 66, has added ground capacity 66a in this feedback loop.
Received signal quality control section 22 is by digital demodulating circuit 42,43, diversity reception part 44, and error code correction part 45, diversity reception control section 46 constitutes.An output 86a of error code correction part 45 is as an input of BER determinant 86.Another input of BER determinant 86 is BER reference signal 86c.
The input 46a of diversity reception control section 46 links to each other with the output 81b of diversity reception part 44, two other input 46b of diversity reception control section 46,46c respectively with the output 33a of AGC control section 33,33b links to each other.The output port 46d of diversity reception control section 46 is connected to the input 33c of AGC control section 33, be used for to AGC control section 33 input signals, as the input 33c of AGC control section 33, so that the dividing potential drop control section of control voltage to be provided to intermediate frequency amplifier in the conduction and cut-off AGC control section 33.In addition, as the power supply output 46e of the power supply port of diversity reception control section 46,46f respectively with the power input mouth 31b of tuned cell 31,32,32b links to each other, so that to tuned cell 31,32 power supplies.
When single collection receives, tuned cell 31 and digital demodulator 42, the branch road work arbitrarily in tuned cell 32 and the digital demodulator 43, receiving communication signal.When switching to diversity reception, tuned cell 31,32 and digital demodulator 42,43 are worked simultaneously.The restituted signal of digital demodulator 42,43 outputs enters diversity reception part 44 and synthesizes, then output.When single collection received, it all was of equal value using the tuned cell of any one branch and digital demodulating circuit.For simplicity, can selecting tuning unit 31 and digital demodulating circuit 42 describe.
Fig. 3 shows the flow chart according to the operation of the diversity receiving device of the embodiment of the invention.When receiving system is just started working,,,, take the diversity reception pattern to receive in order to guarantee the quality of received signal because the situation of received signal is not clear in step 401 shown in Figure 3.The power supply output 46e of diversity reception control section 46,46f are respectively to tuned cell 31 and 32, and digital demodulator 42,43 power supplies.The output 33a of the output port control AGC control section 33 of the 46d of diversity reception control section 46,33b is an open mode.In addition, with the output 33a of AGC control section 33, the AGC input 54a of the intermediate frequency amplifier 54,64 that 33b links to each other, 64a is an open mode simultaneously, is independent of each other.The digital signal that receives by antenna 37,38 enters radio frequency amplifier 51,61 by the input port 35,36 of tuned cell 31,32 respectively.The radiofrequency signal of 51,61 pairs of receptions of radio frequency amplifier is amplified respectively, and amplifying signal is offered frequency mixer 52,62 respectively.The radiofrequency signal of 52,62 pairs of amplifications of frequency mixer is carried out down-conversion, and the intermediate-freuqncy signal that obtains is outputed to intermediate frequency amplifier 54,64 respectively.The intermediate-freuqncy signal of 54,64 pairs of inputs of intermediate frequency amplifier is amplified, and the intermediate frequency amplifying signal that obtains is outputed to digital demodulator 42,43 respectively.
42,43 pairs of intermediate-freuqncy signals of digital demodulator are carried out demodulation, and output is through the digital signal of demodulation.The digital signal of demodulation is input to diversity reception part 44 by the input 44a and the 44b of diversity reception part 44.44 pairs of signal strength signal intensities of diversity reception part and signal to noise ratio are judged, and the result are outputed to diversity reception control section 46 by output 46a.Simultaneously, 44 pairs of two-way digital demodulation signals of diversity reception part synthesize.Under this situation, the carrier-to-noise ratio of signal can be improved 2 times usually.The sub-carrier signal that process is synthesized is input to error correcting section 45 by the output 44c of diversity reception part 44, and the output 45b by error correcting section 45 outputs to rear end equipment then.In addition, the output result of error correcting section 45 also offers the error rate (BER) judgement part 86 by its output.
Behind the steady quality of output signal, can judge by the received signal quality of 44 pairs of two-way inputs of diversity reception part.In the step 402 of Fig. 3, whether the carrier-to-noise ratio of the signal that the single collection of detection receives (can be carried out by diversity reception part 44) and the error rate (BER) (can judge part 86 execution by BER) are lower than set point.If wherein the signal quality of any one branch road has reached the requirement (being to be judged as in the step 402 not) of normal reception, flow process then proceeds to step 403, can close the receiving circuit on another road, in the present embodiment, switching off diversity receives one road power supply output of control section 46, to tuned cell 31 power supplies, and stops to tuned cell 32 power supplies, thereby the diversity reception state is switched to single collection accepting state, to reduce power consumption.Can as carrier-to-noise ratio C/N, judge by the criterion of setting in the diversity reception part 44.
After the step 403, in step 404, in the process that single collection receives, the signal quality that the single collection of monitoring receives for example, judge the carrier-to-noise ratio of the signal that single collection receives, or whether the error rate is lower than predetermined set value.If the signal quality that single collection receives is normal, that is, be not less than predetermined set value, flow process is then returned step 403, continues to receive with single mode set.At this moment, diversity reception part 44 and/or BER judge that part 86 detected received signal qualities are in normal condition, to the normal information of quality of diversity reception control section 46 relevant received signals.When the judged result of step 404 for certainly the time, the signal quality deteriorates that promptly single collection receives need switch to the diversity reception state, flow process then forwards step 405 to.In this case, diversity reception part 44 and/or BER judge that part 86 detected received signal qualities descend, and are lower than predetermined value, and the information that descends to the quality of diversity reception control section 46 relevant received signals by output 81b separately and/or 86 respectively.Diversity reception control section 46 is to being in the not No. one receiving circuit power supply of operating state, to start diversity reception.
After starting the diversity reception pattern, divide the AGC control section 33 of compression functions to distribute voltage by band, to transmit AGC control voltage to tuned cell 31,32.Then, flow process turns back to step 401, receives with the diversity reception pattern.In addition, when in the judged result of step 402 for certainly the time, the signal quality that promptly single collection receives reduces, and when being lower than the predefined carrier-to-noise ratio or the error rate, flow process is then returned step 401, continues to receive with the diversity reception pattern.At this, the criterion in the diversity reception part 44 can be revised, so can corresponding different applicable cases.
Return below with reference to figure 1, the situation that is in single collection reception with tuned cell 31 and digital demodulating circuit 42 one tunnel is an example, illustrates from list to collect the switching that receives to diversity reception.The signal strength signal intensity that is received when antenna 37 descends, for example, reach-when 80dBm is following, the also corresponding thereupon decline of quality of the digital signal 42b of process digital demodulator 42 outputs.When the carrier-to-noise ratio C/N of the received signal that offers diversity reception part 44 drops to below the mark that diversity reception part 44 sets, perhaps BER judges that single collection received and can not guarantee normal reception when the error rate that part 86 is detected was lower than the standard value that sets.At this moment, need switch to the diversity reception pattern from single collection receiving mode.Diversity reception part 44 and/or BER judge the information that part 86 provides the quality of relevant received signal to descend in aforesaid mode to diversity reception control section 46.Diversity reception control section 46 is to being in the not No. one receiving circuit power supply of operating state, to start diversity reception.
At this, the deterioration of signal may be caused by multiple reason.For example, because vehicle is in the numerous environment of building, causes transmission signals repeatedly to be reflected and cause multipath fading by building.In this case, need the continuous receiving circuit of another collection reception antenna that directivity is different in the diversity receiving system usually, to improve signal quality.
In addition, when vehicle entered high-speed moving state, the rapid fading owing to Doppler effect produces can cause the deterioration of received signal equally.Fig. 2 a shows the schematic diagram of the rapid fading situation that explanation provides according to prior art.The trough of rapid fading is spaced apart 1/2 wavelength, and the degree of depth can reach more than the 30dB.According to embodiments of the invention, can be 1/4 wavelength of received signal and compensating by setting interval location between the diversity antenna 37,36 because the signal degradation that rapid fading produces.At this, as an example, the distance that can set between the received signal intensity the best part (geometric center) of the received signal intensity the best part (geometric center) of antenna 37 and antenna 38 is 1/4 of institute's acknowledge(ment) signal frequency band signal wavelength.In addition, need to prove that antenna 37 and 38 can be the antenna of arbitrary shape.
Fig. 2 b shows the schematic diagram that carries out diversity strength relationship of diversity reception antenna signal when switching because of rapid fading.Shown in Fig. 2 b, when the signal strength signal intensity that receives when the antenna of working is in the trough that rapid fading produces, another collection reception antenna of 1/4 wavelength of being separated by with it is in the crest of rapid fading, so its received signal intensity, can have the above raising of 10dB with respect to the antenna of working.This moment, the output 46d by diversity reception control section 46 gave an order to AGC control section 33, opened AGC control section 33.Simultaneously, diversity reception controller 46, starts another and receives branch to tuned cell 32 and digital demodulator 43 power supplies by power output end 46f, makes diversity receiving device switch to the diversity reception pattern from single collection receiving mode.
Should be noted that, no matter be to cause the receiving system must be when single collection receive mode switches to diversity reception mode because of the rapid fading that multipath fading or Doppler effect cause, another collection reception antenna (for example, antenna 38 among Fig. 1) signal strength signal intensity of Jie Shouing, the signal strength signal intensity that the antenna 37 that necessarily is better than receiving receives.Otherwise receiving system can't operate as normal.Concerning in-car TV, will mean that the user can not watch gratifying program.And with respect to just at the antenna 37 of received signal, the intensity of 64 amplifying signals of intermediate frequency amplifier in the tuned cell 32 also necessarily is higher than the intensity of 54 amplifying signals of intermediate frequency amplifier in the tuned cell 31 that is receiving.And according to the characteristic of AGC control, as shown in Figure 4, in the adjustable range of amplifier, the intensity of input signal and control the curve that voltage becomes the approximate reverse ratio.Therefore, the control voltage of intermediate frequency amplifier 64 is less than the control voltage of intermediate frequency amplifier 54.Therefore, AGC control section 33 not only needs to give intermediate frequency amplifier 64 in the tuned cell 32 with the control voltage transmission of the intermediate frequency amplifier in the tuned cell 31 54, also needs the control voltage of intermediate frequency amplifier 64 is adjusted to a less relatively level.In other words, the AGC control magnitude of voltage that offers above-mentioned intermediate frequency amplifier 54 is offered intermediate frequency amplifier 64 in another diversity branch after correcting.
Fig. 5 shows the structural representation according to the voltage branch circuit in the AGC control section 33 in the diversity receiving device of the present invention.As shown in Figure 5, according to present embodiment, AGC control section 33 can be realized this function by the bleeder circuit that has switch.Can use transistor such as field-effect transistor as switch sections.Be connected with divider resistance respectively at transistorized source electrode and drain electrode.The terminal 32a of intermediate frequency amplifier 64 power supplies in second tuned cell 32 is connected between two grouping resistance (as shown in Figure 5), and the control voltage of dividing potential drop is provided to intermediate frequency amplifier 64.Be appreciated that to the invention is not restricted to this, also can utilize other device as switch sections.When diversity reception control section 46 judges that according to diversity reception part 44 and/or BER information decision that part 86 provides starts diversity reception, diversity reception control section 46 is to tuned cell 32 power supplies, make its never operating state switch to operating state, thereby switch to the diversity reception pattern from single collection receiving mode.Simultaneously, the input 33c that diversity reception control section 46 passes through AGC control section 33 makes transistor turns to transistorized grid input high level.Determined to offer the ratio of the branch pressure voltage of tuned cell 31 and 32 respectively with the resistance of transistorized source electrode and the resistance that links to each other of drain electrode, thereby the control voltage of the intermediate frequency amplifier in the tuned cell 31 54 after correcting, is applied to the intermediate frequency amplifier 64 in the tuned cell 32.At this, can select the divider resistance of different resistance ratios according to the different receiving systems and the intermediate frequency amplifier of different qualities.
By having switching device and dividing the AGC control section 33 of compression functions to provide branch pressure-controlled voltage to the intermediate frequency amplifier in the tuned cell of new startup, can in the very short time (about 3ms), receiver be switched to the diversity reception pattern by single collection receiving mode.And when handoff procedure was finished, the control magnitude of voltage of intermediate frequency amplifier 64 also was clamped at a proper level position, had shortened the stabilization time of tuned cell 32.
According to the present invention, tuned cell is switching to the process of diversity reception pattern from single collection receiving mode, and the used time is short, and working condition is stable, and can compensate the signal strength signal intensity deterioration that rapid fading causes, can use in any portable terminal.
According to the present invention, can be based on the input signal strength in the tuned cell of carrying out diversity reception, the proportional intermediate frequency amplifier in the tuned cell of new startup of supply power voltage that is collected the intermediate frequency amplifier in the tuned cell of reception by automatic gain control circuit and fill order provides control voltage, make the intermediate frequency amplifier control voltage in the new tuned cell of opening match, thereby shorten the stabilization time of tuned cell 32 with the signal strength signal intensity that it is received.
In an embodiment of the present invention, the treatment circuit with two branch roads is the mode that example has illustrated the ride gain voltage in the diversity reception.Be appreciated that to the invention is not restricted to this, but can be applied in the diversity reception pattern of multiple branch circuit.
Can be used for portable terminal communication system such as mobile phone, the personal digital assistant according to diversity receiving device of the present invention, and on other communication equipment.
So far invention has been described in conjunction with the preferred embodiments.It should be appreciated by those skilled in the art that under the situation that does not break away from the spirit and scope of the present invention, can carry out various other change, replacement and interpolations.Therefore, scope of the present invention should not be understood that to be limited to above-mentioned specific embodiment, and should be limited by claims.
Claims (16)
1. diversity receiving device comprises:
First tuned cell is used for the signal of communication that receives is downconverted into intermediate-freuqncy signal, and intermediate-freuqncy signal is amplified;
Second tuned cell is used for the signal of communication that receives is downconverted into intermediate-freuqncy signal, and intermediate-freuqncy signal is amplified;
The diversity reception control section is used for the quality according to received signal, switches between single collection receiving mode and diversity reception pattern; With
The automatic gain control section is used for controlling the control voltage of the intermediate frequency amplifier that offers described first tuned cell and described second tuned cell.
2. diversity receiving device according to claim 1, wherein when single collection receiving mode switches to the diversity reception pattern, described automatic gain control section is corrected the control voltage of the intermediate frequency amplifier in the tuned cell that offers new startup according to the control voltage of the intermediate frequency amplifier in the tuned cell that is in single collection receiving mode.
3. diversity receiving device according to claim 1, when wherein said diversity reception control section switched to the diversity reception pattern at described first and second tuned cells of control from singly collecting receiving mode, starting the intermediate frequency amplifier of described automatic gain control section in described first and second tuned cells provided branch pressure-controlled voltage.
4. diversity receiving device according to claim 3, wherein when single collection receiving mode switches to the diversity reception pattern, the automatic gain control section is adjusted the control voltage of the intermediate frequency amplifier that will be applied in the tuned cell of not working according to the control voltage of the intermediate frequency amplifier in the tuned cell of working in single collection receiving mode.
5. diversity receiving device according to claim 1, wherein said automatic gain control section comprise switching device and are connected respectively to the divider resistance formation at the two ends of switching device.
6. diversity receiving device according to claim 5, wherein said switching device is a field-effect transistor, described divider resistance is connected respectively to the source electrode and the drain electrode of described field-effect transistor.
7. diversity receiving device according to claim 6, the power supply terminal of wherein said diversity reception control section links to each other with the grid of described field-effect transistor.
8. diversity receiving device according to claim 1, wherein said diversity receiving device also comprises:
The diversity reception part is used to detect the carrier-to-noise ratio of received signal, and testing result is offered described diversity reception control section;
Error rate judgment part is used to detect the error rate of received signal, and testing result is offered described diversity reception control section.
9. diversity receiving device according to claim 8, wherein said diversity reception control section determines whether to start the diversity reception pattern according to the described carrier-to-noise ratio and/or the described error rate.
10. diversity receiving device according to claim 1, wherein said diversity receiving device also comprises:
First antenna with described first tuned cell is connected is used for receiving communication signal; With
Second antenna with described second tuned cell is connected is used for receiving communication signal.
11. diversity receiving device according to claim 10, the geometric center of wherein said first antenna and described second antenna be received signal wavelength 1/4.
12. diversity receiving device according to claim 10, the antenna that wherein said first antenna and described second antenna are Any shape.
13. a Wireless Telecom Equipment is comprising according to any one the described diversity receiving device in the claim 1 to 12.
14. the control method of a diversity reception comprises step:
Signal quality according to the signal of communication that receives determines whether to switch to the diversity reception pattern from single collection receiving mode;
When single collection receiving mode switches to the diversity reception pattern, starting the intermediate frequency amplifier of automatic gain control section in first and second tuned cells provides branch pressure-controlled voltage.
15. method according to claim 14, the wherein said step of branch pressure-controlled voltage that provides comprises the control voltage of adjusting the intermediate frequency amplifier that will be applied in the tuned cell of not working according to the control voltage of the intermediate frequency amplifier in the tuned cell of working in single collection receiving mode.
16. method according to claim 14 further comprises the step that the carrier-to-noise ratio and/or the error rate according to received signal determine whether to start the diversity reception pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710141174XA CN101369838A (en) | 2007-08-13 | 2007-08-13 | Apparatus for regulating automatic gain control voltage in diversity reception switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200710141174XA CN101369838A (en) | 2007-08-13 | 2007-08-13 | Apparatus for regulating automatic gain control voltage in diversity reception switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101369838A true CN101369838A (en) | 2009-02-18 |
Family
ID=40413499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200710141174XA Pending CN101369838A (en) | 2007-08-13 | 2007-08-13 | Apparatus for regulating automatic gain control voltage in diversity reception switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101369838A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647221A (en) * | 2011-02-17 | 2012-08-22 | 中国移动通信集团公司 | Diversity reception, switch and control method and diversity reception machine |
| CN109831238A (en) * | 2019-01-14 | 2019-05-31 | 西安外事学院 | A kind of choosing based on high specific stops diversity combining method |
| CN111034072A (en) * | 2017-09-05 | 2020-04-17 | 法国大陆汽车公司 | Method for updating radio station list receivable by radio receiving system |
-
2007
- 2007-08-13 CN CNA200710141174XA patent/CN101369838A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647221A (en) * | 2011-02-17 | 2012-08-22 | 中国移动通信集团公司 | Diversity reception, switch and control method and diversity reception machine |
| CN102647221B (en) * | 2011-02-17 | 2014-12-31 | 中国移动通信集团公司 | Diversity reception, switch and control method and diversity reception machine |
| CN111034072A (en) * | 2017-09-05 | 2020-04-17 | 法国大陆汽车公司 | Method for updating radio station list receivable by radio receiving system |
| CN111034072B (en) * | 2017-09-05 | 2021-11-30 | 法国大陆汽车公司 | Method for updating radio station list receivable by radio receiving system |
| US11272435B2 (en) | 2017-09-05 | 2022-03-08 | Continental Automotive France | Method for updating a list of stations that can be received by a radio receiver system |
| CN109831238A (en) * | 2019-01-14 | 2019-05-31 | 西安外事学院 | A kind of choosing based on high specific stops diversity combining method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8155610B2 (en) | Combining multiple frequency modulation (FM) signals in a receiver | |
| US7454180B2 (en) | Vehicle-mounted receiving apparatus for reducing distortion, improving reception sensitivity, and saving power | |
| EP2107640A1 (en) | Receiver system for receiving analog and digital signals | |
| US20080119148A1 (en) | Radio receiver and method of dynamically setting tuning parameters based on location | |
| WO1999039457A1 (en) | Apparatus and method for selecting between a plurality of antennas utilized by a microcellular communications terminal for reception of a signal | |
| US7317894B2 (en) | Satellite digital radio broadcast receiver | |
| JP5351327B2 (en) | Diversity receiver | |
| US20060209216A1 (en) | Analog/digital-compatible front-end module | |
| US6931081B2 (en) | Antenna diversity receiver | |
| CN101369838A (en) | Apparatus for regulating automatic gain control voltage in diversity reception switch | |
| US20090080559A1 (en) | Antenna diversity by means of its through connection for receivers of digital radio signals | |
| CN101505158A (en) | Composite tuner capable of preventing mutual interference between terrestrial broadcast and satellite broadcast | |
| JP3852706B2 (en) | Terrestrial digital broadcast receiver | |
| US20070010193A1 (en) | Broadcasting receiver and method of receiving a broadcasting wave | |
| JP5238233B2 (en) | Radio receiving apparatus and radio receiving method | |
| US20060018286A1 (en) | Digital broadcast receiver apparatus | |
| US20080119152A1 (en) | Automatic gain control apparatus and method in mobile communication system | |
| JPH0865233A (en) | Portable telephone set | |
| JP2006101245A (en) | Receiver | |
| KR20150063721A (en) | Device and method for adaptive data processing between FM and RDS in the diversity antenna system | |
| JPH04111621A (en) | Diversity receiver | |
| EP1080378A1 (en) | Mobile radio receiver | |
| JP2001028509A (en) | Diversity receiver and portable terminal | |
| US20050026586A1 (en) | Radio receiver for vehicle and control method thereof | |
| JP3208343B2 (en) | Diversity device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090218 |