CN102243308A - Single-channel radiofrequency receiver and frequency planning method thereof - Google Patents
Single-channel radiofrequency receiver and frequency planning method thereof Download PDFInfo
- Publication number
- CN102243308A CN102243308A CN2011101032773A CN201110103277A CN102243308A CN 102243308 A CN102243308 A CN 102243308A CN 2011101032773 A CN2011101032773 A CN 2011101032773A CN 201110103277 A CN201110103277 A CN 201110103277A CN 102243308 A CN102243308 A CN 102243308A
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- divider
- local
- filter
- 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 single-channel radiofrequency receiver and a frequency planning method thereof are disclosed, wherein the method comprises the following steps of: receiving a radiofrequency signal corresponding to any one mode and frequency band in all GNSS (Global Navigation Satellite System) satellites by means of time sharing, and adjusting the local frequency output by a voltage-controlled oscillator to a mixer correspondingly, thereby mixing a radiofrequency carrier frequency and outputting an intermediate frequency signal; performing parameter configuration on an intermediate frequency filter with image rejection to cause the filter to suppress an image interference signal in the matched intermediate frequency signals; configuring the frequency division value of a phase-locked loop synthesizer with a fractional frequency division to perform a feedback control on the local frequency; and configuring the sampling frequency of an analogue-digital converter to cause the sampling frequency to be the integer multiples of reduced frequency. Due to the method disclosed by the invention, the same single-channel GNSS radiofrequency receiver is adaptive for receiving GNSS radiofrequency signals with different modes and different frequencies, thereby simplifying the system and the interface design of the system with an off-chip baseband processing chip, reducing the system and radically eliminating the signal interference.
Description
Technical field
The present invention relates to a kind of communication chip and frequency planning method thereof, particularly a kind of single pass radio-frequency transmitter and frequency planning method thereof that is applicable to that Global Navigation System (GNSS) multi-frequency multi-mode receives.
Background technology
Global navigation satellite system GNSS (Global Navigation Satellite Systems) mainly comprises at present the global position system GPS (Global Positioning System) of the U.S., Muscovite GLONASS navigational satellite system GLONASS(GLObal Navigation Satellite System), the Galileo positioning system Galileo(Galileo Positioning System of European Union) and the Beidou satellite navigation system Compass of China, the Navsat of GNSS shown in Fig. 1 frequency spectrum profile is seen in its corresponding frequency range division.
The about 1156MHz of the spectrum distribution of GNSS is to the 1610MHz frequency range as can be seen from Figure 1.Accordingly can timesharing or receive the corresponding navigation signal simultaneously at the radio-frequency transmitter of GNSS also requirement.And the technology of existing single pass GNSS radio-frequency transmitter only provides correspondent frequency planning to the GNSS radio-frequency transmitter of single-mode or single frequency band.
Be existing a kind of gps satellite receiver radio frequency front end 101 as shown in Figure 2, it only can receive and handle the satellite-signal of the L1 frequency range that is positioned at gps system, is carried out the filter amplifying processing of front end by outer 103 pairs of these GPS-L1 signals of Surface Acoustic Wave Filter of sheet of two-stage low noise amplifier 102,104 and setting between the two.The local frequency of voltage controlled oscillator 112 outputs is defined as 1536f
0(cell frequency f
0Be 1.023MHz), i.e. 1571.328MHz; This local frequency forms the two paths of signals of quadrature by phase shifter 111, and exports the low-converter of two quadratures in the frequency mixer 105 to; Described frequency mixer 105 is according to 1536f
0Described local frequency, be 1540 f to frequency
0GPS L1 signal mixing after obtain 4f
0IF-FRE IF; The intermediate-frequency filter 107 that is suppressed by the band mirror image carries out the intermediate-frequency channel selection again, and the bandwidth of this intermediate-frequency filter 107 also is 4f
0Afterwards, undertaken exporting after the signal Processing by automatic gain controller 108, analog to digital converter 109 successively.
In addition, to wherein also having done frequency planning for frequency mixer 105 provides the part of local frequency: the output of voltage controlled oscillator 112 is handled by four-divider 113 and is obtained 384f
0, this frequency exports the phaselocked loop synthesizer 116 with decimal function to; Phaselocked loop synthesizer 116 is controlled by the output frequency of 117 pairs of described voltage controlled oscillators 112 of loop filter according to the reference clock of outside via described input clock Shaping Module 110 inputs.384f behind four frequency divisions
0Frequency is 16f by 20 four-dividers, 114 further frequency divisions also
0The back is as the sample frequency of analog to digital converter 109, and this sample frequency is also exported to outside baseband processing chip and used.Also be provided with interface control circuit, it receives and the encoded control signal, thereby the phaselocked loop synthesizer and the automatic gain controller of described fractional frequency division is configured respectively.
The frequency planning technology of existing as can be seen GNSS radio-frequency transmitter is single, only can receive at the radiofrequency signal of single-mode or single frequency band, the requirement that the multi-frequency multi-mode GNSS radio frequency that is difficult to adapt to navigation application comprehensively and is proposed receives.The shortcoming of the prior art mainly contains: the first, can only receive the Navsat of single-mode or frequency range, fail to make full use of the advantage that the different frequency range navigation satellite signal is brought; The second, the Navsat that will receive different mode or frequency range just needs the receiving chip of a plurality of corresponding frequencies planning, and one side can increase the cost of system like this; Also can increase the interference between the different radio frequency receiver chip on the other hand, even can cause correctly to receive corresponding GNSS signal.Three, increased the complicacy of GNSS receiving system, increased complexity and difficulty when partly integrating with Base-Band Processing.
Summary of the invention
The purpose of this invention is to provide a kind of single channel radio-frequency transmitter and frequency planning method thereof, make same single pass GNSS radio-frequency transmitter can adapt to the GNSS radiofrequency signal that receives the different mode different frequency, thereby the simplified system design reduces system cost, and fundamentally erasure signal disturbs.
In order to achieve the above object, technical scheme of the present invention provides a kind of single channel radio-frequency transmitter and frequency planning method thereof; Wherein said a kind of single channel radio-frequency transmitter comprises:
First order low noise amplifier, its timesharing receives any one pattern and the pairing radiofrequency signal of frequency range thereof in the global navigational satellite, and carries out Filtering Processing with exporting the outer connected Surface Acoustic Wave Filter of sheet after the radiofrequency signal amplification to;
Second level low noise amplifier is connected with the output terminal of described Surface Acoustic Wave Filter, radiofrequency signal is taken back in the chip further amplify;
Frequency mixer is connected with the output terminal of described second level low noise amplifier, and according to its local frequency signal that receives in addition, the radiofrequency signal after the amplification of secondary low noise is carried out mixing, and output IF-FRE signal;
The configurable intermediate-frequency filter that the band mirror image suppresses is connected with the output terminal of described frequency mixer, and corresponding mirror image undesired signal in the IF-FRE signal is suppressed filtering, obtains needed intermediate-freuqncy signal;
Automatic gain amplifier is connected with the output terminal of described intermediate-frequency filter, amplifies needed intermediate-freuqncy signal and makes it have certain signal intensity;
Analog to digital converter is connected with the output terminal of described automatic gain amplifier, and needed intermediate-freuqncy signal is converted to digital baseband signal, and the baseband processing chip outside sheet sends;
Also comprise, voltage controlled oscillator, it is connected with described frequency mixer by a phase shifter, with the local frequency signal that provides mixing to need.
Described single channel radio-frequency transmitter also comprises:
The four-divider of Lian Jieing, phaselocked loop synthesizer, loop filter successively with fractional frequency division function; Described four-divider is connected with the output terminal of described voltage controlled oscillator; The output terminal of described loop filter is connected to form the loop with described voltage controlled oscillator again;
The local frequency that described voltage controlled oscillator sends, after handling by described four-divider, the frequency values that is obtained after with local frequency four frequency divisions by described phaselocked loop synthesizer is with the outer 16f via described input clock Shaping Module input of sheet
0Reference clock is divided by, and the frequency division numerical value of the fractional frequency division that obtains thus is sent to described voltage controlled oscillator by loop filter again, and the local frequency of its output is controlled.
Described single channel radio-frequency transmitter also comprises:
Programmable frequency divider is connected with described four-divider, described analog to digital converter respectively; The divide ratio mating reaction of described programmable frequency divider and described four-divider, the local frequency of described voltage controlled oscillator output carried out the integral multiple frequency reducing after, be sent to described analog to digital converter as its sample frequency; Described programmable frequency divider also is sent to described sample frequency the outer baseband processing chip of sheet.
Described single channel radio-frequency transmitter also comprises:
Interface control circuit, it receives and deciphers the control signal that the outer baseband processing chip of sheet sends by the control signal interface;
Described interface control circuit also is connected with described intermediate-frequency filter, according to the bandwidth and the intermediate frequency requirement of different radio frequency signal, and the corresponding signal bandwidth value of described intermediate-frequency filter and the intermediate frequency value of employing thereof adjusted;
Described interface control circuit also is connected with described phaselocked loop synthesizer, and the frequency division numerical value of its fractional frequency division is carried out parameter configuration;
Described interface control circuit also is connected with described programmable frequency divider, and its divide ratio is configured, and described programmable frequency divider is cooperated with the divide ratio of four-divider, forms the even-multiple frequency reducing to the local frequency of described voltage controlled oscillator output;
Described interface control circuit also is connected with described automatic gain controller, and its signal gain amount is carried out parameter configuration.
The frequency planning method of single channel radio-frequency transmitter of the present invention is to carry out in the process that pairing radiofrequency signal timesharing receives to any one pattern and frequency range thereof in the global navigational satellite;
Adapt with the radio frequency carrier frequency of each navigation mode, described frequency planning method comprises following steps:
1, adjust the local frequency of described voltage controlled oscillator output, make described frequency mixer according to this local frequency, radio frequency carrier frequency is to received signal carried out mixing, with the signal of correspondence output IF-FRE;
2, the described intermediate-frequency filter that the band mirror image is suppressed carries out parameter configuration, and the parameter of described intermediate-frequency filter and the signal of described IF-FRE are complementary, thereby wherein corresponding mirror image undesired signal is suppressed filtering, obtains needed intermediate-freuqncy signal;
3, the frequency division numerical value to the fractional frequency division of described phaselocked loop synthesizer is configured;
The frequency values that is obtained after with the local frequency frequency division by described phaselocked loop synthesizer be divided by with the reference clock of the outer input of sheet, and the frequency division numerical value of the fractional frequency division that will obtain thus is as the parameter of described local frequency being carried out FEEDBACK CONTROL;
4, the sample frequency to described analog to digital converter is configured, and making described sample frequency is the integral multiple frequency reducing of described local frequency.
In the step 2, described interface control circuit is according to control signal, and the signal bandwidth value of described intermediate-frequency filter and the intermediate frequency value of employing thereof are adjusted in the bandwidth of corresponding different radio frequency signal and intermediate frequency requirement.
In the step 2, during the parameter adjustment of described intermediate-frequency filter,, under condition, choose the described intermediate frequency value that adapts with it greater than 1/2 bandwidth of described signal according to the signal bandwidth of respective radio-frequency signals.
In the step 3, the reference clock of described outer input, its frequency is 16f
0f
0Represent cell frequency 1.023MHz.
In the step 4, the sample frequency of described analog to digital converter promptly is the frequency values of described programmable frequency divider output;
Be configured by the frequency division parameter of described interface control circuit described programmable frequency divider, thereby making the described sample frequency of exporting behind described four-divider, the cooperation frequency division of programmable frequency divider to described local frequency, is the even-multiple frequency reducing of described local frequency.
In the step 4, the sample frequency of described analog to digital converter is greater than 4 times described IF-FRE.
Single channel radio-frequency transmitter of the present invention and frequency planning method thereof, the requirement that the multi-frequency multi-mode GNSS radiofrequency signal that can adapt to navigation application comprehensively and proposed receives has solved existing GNSS radio-frequency transmitter and frequency planning thereof effectively and only can carry out the problem that signal receives at single-mode or single frequency band.
Compared with prior art, single channel radio-frequency transmitter of the present invention has following advantage:
The first, the single chip of single channel radio-frequency transmitter of the present invention can be realized the GNSS radiofrequency signal that comprises the different mode different frequency that timesharing reception table 1 is listed, also can make full use of the technical advantage that the different frequency range navigation satellite signal is brought.
The second, the radio-frequency transmitter chip that designs according to frequency planning provided by the invention, can be according to the mode of operation of the outer baseband processing chip of sheet, carry out parameter configuration by the interface control circuit that is attached thereto, simplify the product systems design proposal greatly, reduced system cost; Also reduced simultaneously requirement, reduced the complexity of system design for system development.
Three, because system can use the reception of the signal of unified support multimode multifrequency GNSS, do not need to use a plurality of different radio-frequency front-end receiving chips in the system, fundamentally eliminated the interference between the different radio frequency receiver chip, avoided causing correctly to receive the situation of corresponding GNSS signal well owing to interference each other.
Four, owing to only use same radiofrequency receiving chip, can receive the GNSS radiofrequency signal of corresponding different mode different frequency, unified and simplified and baseband processing chip between Interface design, reduced difficulty with the baseband processing chip integration.
By utilizing the frequency planning method of the GNSS radiofrequency signal of carrying out multimode multifrequency proposed by the invention, also further have following technique effect:
The first, because the sample frequency that described analog to digital converter uses, be that the local frequency that is directly produced by voltage controlled oscillator is obtained through the even-multiple frequency division, thereby the corresponding higher harmonic components of described GNSS radiofrequency signal is carrying out will just in time equaling local frequency after the LNA device is handled, promptly Dui Ying higher harmonic components will become DC component after mixing, and by follow-up intermediate-frequency filter institute filtering.For example at the GNSS pattern of gps system L5 frequency range, 16 higher harmonic components of its correspondence just just in time with this GNSS pattern in corresponding 1134f
0Local frequency equate, thereby be suppressed filtering.
The second, same owing to adopted rational analog to digital converter sample frequency, owing in each GNSS pattern, this sample frequency is also bigger than 4 times of selected IF-FRE usually, satisfies the requirement of sampling thheorem.Therefore mention the higher hamonic wave in above-mentioned first, other harmonic frequency signal also can be suppressed effectively.
Description of drawings
Fig. 1 is a GNSS Navsat frequency spectrum profile;
Fig. 2 is radio-frequency transmitter and the frequency planning synoptic diagram thereof that has now at the LI frequency range of gps system;
Fig. 3 is single channel radio-frequency transmitter of the present invention and frequency planning synoptic diagram thereof.
Embodiment
As shown in Figure 3, single channel radio-frequency transmitter of the present invention, its one-piece construction and prior art are similar, and difference is wherein configurable with the intermediate-frequency filter 207 of mirror image inhibition; Simultaneously, with 20 four-divider 114(in programmable frequency divider 213 alternate figures 1 only at the L1 frequency range of gps system); And, interface control circuit by control signal reception and decoding, phaselocked loop synthesizer 217, automatic gain controller 208 correspondences to described intermediate-frequency filter 207, programmable frequency divider 213, fractional frequency division are configured, adjust the divide ratio, bandwidth value, intermediate frequency respective value, analog-to-digital sample frequency of the local frequency of radio-frequency transmitter of the present invention etc., thereby make single pass radio-frequency transmitter of the present invention can adapt to GLONASS (Global Navigation Satellite System) (hereinafter to be referred as the GNSS) radiofrequency signal that receives the different mode different frequency.
Concrete, first order low noise amplifier 202 receives any one pairing radiofrequency signal in whole GNSS satellites, and the Surface Acoustic Wave Filter 203 that exports the outer biobelt of chip or two respective radio-frequency after signal amplifies to is carried out Filtering Processing; Afterwards, take back in the chip and further amplify by second level low noise amplifier 204.
In addition, for frequency mixer 207 provides the described voltage controlled oscillator 216 of local frequency signal, its frequency output is sent to phaselocked loop synthesizer 217 and programmable frequency divider 213 with fractional frequency division function respectively after handling by four-divider 212.The outer 16f of sheet
0Reference clock input to described phaselocked loop synthesizer 217 via described input clock Shaping Module 210, described input clock Shaping Module 210 is shaped as the square wave clock signal with the sinusoidal clock signal of reference clock, increases its signal driving force by a driving buffer circuit simultaneously.
According to the parameter configuration of described interface control circuit 219, the phaselocked loop synthesizer 217 of described fractional frequency division is with the described 16f that imports outward with sheet behind local frequency four frequency divisions
0Reference clock is divided by, and the frequency division numerical value that obtains is thus controlled by the local frequency of 218 pairs of described voltage controlled oscillator 216 outputs of loop filter.Simultaneously, described interface control circuit 219 also is configured the parameter of programmable frequency divider 213, thereby under the acting in conjunction of described four-divider 212, programmable frequency divider 213,, and be sent to analog to digital converter 209 as its sample frequency with the frequency reducing of local frequency even-multiple; This sample frequency also is sent to the outer baseband processing chip of sheet in addition and is used for the synchronous of signal sampling.
Based on above-mentioned single pass radio-frequency transmitter, the invention allows for the corresponding frequency planning that receives described multi-frequency multi-mode GNSS radiofrequency signal of energy, specifically be shown in Table 1, wherein f
0Represent cell frequency 1.023MHz.
At first, after GNSS Navsat frequency spectrum profile shown in Figure 1 analyzed, wherein each GNSS pattern and GNSS radio frequency carrier frequency thereof were organized in respectively in the 1st, 2 row of table 1.
Described frequency planning method specifically comprises following steps:
1, adjusts the local frequency of described voltage controlled oscillator 216 label 215 places output in Fig. 3, see Table shown in 1 the 5th row.
Corresponding different described GNSS pattern (the 1st row of table 1), local frequency (the 5th row) according to described voltage controlled oscillator 216 corresponding outputs, described GNSS radio frequency carrier frequency (the 2nd row) after 205 pairs of processes of described frequency mixer secondary low noise is amplified is carried out mixing, with the IF-FRE signal of output shown in the 4th row.
2, the configurable intermediate-frequency filter 207 that the band mirror image is suppressed carries out parameter configuration.
Receive and the interface control circuit 219 of decoding by described control signal, adjust the signal bandwidth value of described intermediate-frequency filter 207 and the intermediate frequency value of selecting for use, see Table the frequency values shown in 1 the 3rd, 4 row.Described intermediate-frequency filter 207 is the corresponding mirror image undesired signal of filtering from the frequency of described frequency mixer 205 outputs, obtains needed GNSS intermediate-freuqncy signal, and exports automatic gain controller 208 and analog to digital converter 209 to.
According to the requirement of sampling thheorem, the sample frequency of described analog to digital converter 209 is greater than 2 times of highest frequency of signal at least; But frequency is excessive, can cause system power dissipation increase, stability to reduce, increase the debugging difficulty of hardware circuit again.Therefore should be according to described signal bandwidth, under condition, get suitable IF-FRE as far as possible greater than 1/2 bandwidth of corresponding signal.
3, the frequency division numerical value to the phaselocked loop synthesizer 217 of fractional frequency division is configured, and is organized in the 6th row of table 1.
According to the parameter configuration of described interface control circuit 219, the phaselocked loop synthesizer 217 of described fractional frequency division is with the 16f that imports outward with sheet behind local frequency (the 5th row) four frequency divisions
0Reference clock is divided by, and obtains the frequency division numerical value shown in the 6th row thus; This frequency division numerical value will be controlled by the output of 218 pairs of described voltage controlled oscillators 216 of loop filter.
4, the sample frequency to analog to digital converter 209 is configured, and is organized in the 7th row of table 1.The sample frequency of described analog to digital converter promptly is the frequency values of described programmable frequency divider 213 outputs.
Because the frequency reducing of integral multiple is easy to realize that especially the frequency reducing of even-multiple is easier to realize on circuit.Therefore, parameter by 219 pairs of described programmable frequency dividers 213 of described interface control circuit is configured, thereby under the acting in conjunction of described four-divider 212, programmable frequency divider 213, the local frequency of voltage controlled oscillator 216 outputs is carried out the even-multiple frequency reducing, and be sent to analog to digital converter 209 as its sample frequency; The also other circuit via label 214 of this sample frequency is sent to the outer baseband processing chip of sheet and is used for the synchronous of signal sampling.
Table 1
In sum, single channel radio-frequency transmitter of the present invention and frequency planning method thereof, the requirement that the multi-frequency multi-mode GNSS radiofrequency signal that can adapt to navigation application comprehensively and proposed receives has solved existing GNSS radio-frequency transmitter and frequency planning thereof effectively and only can carry out the problem that signal receives at single-mode or single frequency band.
Therefore, single channel radio-frequency transmitter of the present invention has following advantage:
The first, the single chip of single channel radio-frequency transmitter of the present invention can be realized the GNSS radiofrequency signal that comprises the different mode different frequency that timesharing reception table 1 is listed, also can make full use of the technical advantage that the different frequency range navigation satellite signal is brought.
The second, the radio-frequency transmitter chip that designs according to frequency planning provided by the invention, can be according to the mode of operation of the outer baseband processing chip of sheet, carry out parameter configuration by the interface control circuit 219 that is attached thereto, simplify the product systems design proposal greatly, reduced system cost; Also reduced simultaneously requirement, reduced the complexity of system design for system development.
Three, because system can use the reception of the signal of unified support multimode multifrequency GNSS, do not need to use a plurality of different radio-frequency front-end receiving chips in the system, fundamentally eliminated the interference between the different radio frequency receiver chip, avoided causing correctly to receive the situation of corresponding GNSS signal well owing to interference each other.
Four, owing to only use same radiofrequency receiving chip, can receive the GNSS radiofrequency signal of corresponding different mode different frequency, unified and simplified and baseband processing chip between Interface design, reduced difficulty with the baseband processing chip integration.
By utilizing the frequency planning method of the GNSS radiofrequency signal of carrying out multimode multifrequency proposed by the invention, also further have following technique effect:
The first, because the sample frequency that described analog to digital converter 209 uses, be that the local frequency that is directly produced by voltage controlled oscillator 216 is obtained through the even-multiple frequency division, thereby the corresponding higher harmonic components of described GNSS radiofrequency signal is carrying out will just in time equaling local frequency after LNA device 204 is handled, promptly Dui Ying higher harmonic components will become DC component after mixing, and by 207 filterings of follow-up intermediate-frequency filter.For example at the GNSS pattern of gps system L5 frequency range, 16 higher harmonic components of its correspondence just just in time with this GNSS pattern in corresponding 1134f
0Local frequency equate, thereby be suppressed filtering.
The second, same owing to adopted rational analog to digital converter as shown in table 1 209 sample frequency, owing in each GNSS pattern, this sample frequency is also bigger than 4 times of selected IF-FRE usually, satisfies the requirement of sampling thheorem.Therefore mention the higher hamonic wave in above-mentioned first, other harmonic frequency signal also can be suppressed effectively.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a single channel radio-frequency transmitter is characterized in that, comprises:
First order low noise amplifier (202), its timesharing receives any one pattern and the pairing radiofrequency signal of frequency range thereof in the global navigational satellite, and carries out Filtering Processing with exporting the outer connected Surface Acoustic Wave Filter (203) of sheet after the radiofrequency signal amplification to;
Second level low noise amplifier (204) is connected with the output terminal of described Surface Acoustic Wave Filter (203), radiofrequency signal is taken back in the chip further amplify;
Frequency mixer (205) is connected with the output terminal of described second level low noise amplifier (204), and according to its local frequency signal that receives in addition, the radiofrequency signal after the amplification of secondary low noise is carried out mixing, and output IF-FRE signal;
The configurable intermediate-frequency filter (207) that the band mirror image suppresses is connected with the output terminal of described frequency mixer (205), and corresponding mirror image undesired signal in the IF-FRE signal is suppressed filtering, obtains needed intermediate-freuqncy signal;
Automatic gain amplifier (208) is connected with the output terminal of described intermediate-frequency filter (207), amplifies needed intermediate-freuqncy signal and makes it have certain signal intensity;
Analog to digital converter (209) is connected with the output terminal of described automatic gain amplifier (208), and needed intermediate-freuqncy signal is converted to digital baseband signal, and the baseband processing chip outside sheet sends;
Also comprise, voltage controlled oscillator (216), it is connected with described frequency mixer (205) by a phase shifter (211), with the local frequency signal that provides mixing to need.
2. single channel radio-frequency transmitter according to claim 1 is characterized in that, also comprises:
The four-divider of Lian Jieing (212), phaselocked loop synthesizer (217), loop filter (218) successively with fractional frequency division function; Described four-divider (212) is connected with the output terminal of described voltage controlled oscillator (216); The output terminal of described loop filter (218) is connected to form the loop with described voltage controlled oscillator (216) again;
The local frequency that described voltage controlled oscillator (216) sends, after described four-divider (212) processing, the frequency values that is obtained after with local frequency four frequency divisions by described phaselocked loop synthesizer (217) is with the outer 16f via described input clock Shaping Module (210) input of sheet
0Reference clock is divided by, and the frequency division numerical value of the fractional frequency division that obtains thus is sent to described voltage controlled oscillator (216) by loop filter (218) again, and the local frequency of its output is controlled.
3. as single channel radio-frequency transmitter as described in the claim 2, it is characterized in that, also comprise:
Programmable frequency divider (213) is connected with described four-divider (212), described analog to digital converter (209) respectively; The divide ratio mating reaction of described programmable frequency divider (213) and described four-divider (212), after the local frequency of described voltage controlled oscillator (216) output carried out the integral multiple frequency reducing, be sent to described analog to digital converter (209) as its sample frequency; Described programmable frequency divider (213) also is sent to described sample frequency the outer baseband processing chip of sheet.
4. as single channel radio-frequency transmitter as described in the claim 3, it is characterized in that, also comprise:
Interface control circuit (219), it receives and deciphers the control signal that the outer baseband processing chip of sheet sends by the control signal interface;
Described interface control circuit (219) also is connected with described intermediate-frequency filter (207), according to the bandwidth and the intermediate frequency requirement of different radio frequency signal, and the corresponding signal bandwidth value of described intermediate-frequency filter (207) and the intermediate frequency value of employing thereof adjusted;
Described interface control circuit (219) also is connected with described phaselocked loop synthesizer (217), and the frequency division numerical value of its fractional frequency division is carried out parameter configuration;
Described interface control circuit (219) also is connected with described programmable frequency divider (213), its divide ratio is configured, described programmable frequency divider (213) is cooperated with the divide ratio of four-divider (212), form even-multiple frequency reducing the local frequency of described voltage controlled oscillator (216) output;
Described interface control circuit (219) also is connected with described automatic gain controller (208), and its signal gain amount is carried out parameter configuration.
5. the frequency planning method of a single channel radio-frequency transmitter is characterized in that, described frequency planning method is to carry out in the process that pairing radiofrequency signal timesharing receives to any one pattern and frequency range thereof in the global navigational satellite;
Adapt with the radio frequency carrier frequency of each navigation mode, described frequency planning method comprises following steps:
1, adjust the local frequency of described voltage controlled oscillator (216) output, make described frequency mixer (205) according to this local frequency, radio frequency carrier frequency is to received signal carried out mixing, with the signal of correspondence output IF-FRE;
2, the described intermediate-frequency filter (207) that the band mirror image is suppressed carries out parameter configuration, the parameter of described intermediate-frequency filter (207) and the signal of described IF-FRE are complementary, thereby wherein corresponding mirror image undesired signal is suppressed filtering, obtain needed intermediate-freuqncy signal;
3, the frequency division numerical value to the fractional frequency division of described phaselocked loop synthesizer (217) is configured;
The frequency values that is obtained after with the local frequency frequency division by described phaselocked loop synthesizer (217) be divided by with the reference clock of the outer input of sheet, and the frequency division numerical value of the fractional frequency division that will obtain thus is as the parameter of described local frequency being carried out FEEDBACK CONTROL;
4, the sample frequency to described analog to digital converter (209) is configured, and making described sample frequency is the integral multiple frequency reducing of described local frequency.
6. as the frequency planning method of single channel radio-frequency transmitter as described in the claim 5, it is characterized in that,
In the step 2, described interface control circuit (219) is according to control signal, and the signal bandwidth value of described intermediate-frequency filter (207) and the intermediate frequency value of employing thereof are adjusted in the bandwidth of corresponding different radio frequency signal and intermediate frequency requirement.
7. as the frequency planning method of single channel radio-frequency transmitter as described in the claim 6, it is characterized in that,
In the step 2, during the parameter adjustment of described intermediate-frequency filter (207),, under condition, choose the described intermediate frequency value that adapts with it greater than 1/2 bandwidth of described signal according to the signal bandwidth of respective radio-frequency signals.
8. the frequency planning method of single channel radio-frequency transmitter described in claim 6 or 7 is characterized in that,
In the step 3, the reference clock of described outer input, its frequency is 16f
0f
0Represent cell frequency 1.023MHz.
9. as the frequency planning method of single channel radio-frequency transmitter as described in the claim 8, it is characterized in that,
In the step 4, the sample frequency of described analog to digital converter (209) promptly is the frequency values of described programmable frequency divider (213) output;
Be configured by the frequency division parameter of described interface control circuit (219) described programmable frequency divider (213), thereby making the described sample frequency of exporting behind described four-divider (212), the cooperation frequency division of programmable frequency divider (213) to described local frequency, is the even-multiple frequency reducing of described local frequency.
10. as the frequency planning method of single channel radio-frequency transmitter as described in the claim 9, it is characterized in that,
In the step 4, the sample frequency of described analog to digital converter (209) is greater than 4 times described IF-FRE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101032773A CN102243308A (en) | 2011-04-25 | 2011-04-25 | Single-channel radiofrequency receiver and frequency planning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101032773A CN102243308A (en) | 2011-04-25 | 2011-04-25 | Single-channel radiofrequency receiver and frequency planning method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102243308A true CN102243308A (en) | 2011-11-16 |
Family
ID=44961465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101032773A Pending CN102243308A (en) | 2011-04-25 | 2011-04-25 | Single-channel radiofrequency receiver and frequency planning method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102243308A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882536A (en) * | 2012-08-28 | 2013-01-16 | 叶松 | Radio frequency receiver of BeiDou radio determination satellite service (RDSS) satellite navigation system |
| CN104135296A (en) * | 2014-07-12 | 2014-11-05 | 无锡中星微电子有限公司 | Adjustable intermediate frequency wireless receiver and Bluetooth module |
| 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 |
| CN104868883A (en) * | 2015-05-08 | 2015-08-26 | 长安大学 | Signal processing circuit for output signal of acoustic surface wave oscillator |
| CN107659321A (en) * | 2017-11-06 | 2018-02-02 | 深圳市夸克云电子信息技术有限公司 | A kind of AIS single-channel receivers of automatic frequency-hopping |
| CN108072884A (en) * | 2017-09-18 | 2018-05-25 | 西安交通大学 | Global positioning system and Beidou satellite navigation system single channel dual-mode radio frequency receiver |
| CN108303587A (en) * | 2017-01-12 | 2018-07-20 | 北京普源精电科技有限公司 | Improve the spectrum analyzer that bottom is made an uproar |
| CN109581417A (en) * | 2018-11-29 | 2019-04-05 | 金石临(广州)科技有限公司 | A kind of dual-mode radio frequency signal receiving device and method of reseptance |
| CN109889218A (en) * | 2019-04-02 | 2019-06-14 | 成都云溯新起点科技有限公司 | A kind of identification of single channel co-channel interference and counteracting method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055309A (en) * | 2007-05-25 | 2007-10-17 | 北京东方联星科技有限公司 | Configurable general radio frequency processing method and system of navigation satellite signal |
| CN101303403A (en) * | 2007-06-11 | 2008-11-12 | 杭州中科微电子有限公司 | Multi-mode satellite navigation receiving radio frequency front end chip |
| CN101629996A (en) * | 2009-08-18 | 2010-01-20 | 上海华测导航技术有限公司 | Radio frequency structure for realizing function of switching dual-band GPS satellite signal into base band signal |
| US20100302100A1 (en) * | 2009-06-01 | 2010-12-02 | Mstar Semiconductor, Inc. | Signal Processing Apparatus for Multi-mode Satellite Positioning System and Method Thereof |
-
2011
- 2011-04-25 CN CN2011101032773A patent/CN102243308A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101055309A (en) * | 2007-05-25 | 2007-10-17 | 北京东方联星科技有限公司 | Configurable general radio frequency processing method and system of navigation satellite signal |
| CN101303403A (en) * | 2007-06-11 | 2008-11-12 | 杭州中科微电子有限公司 | Multi-mode satellite navigation receiving radio frequency front end chip |
| US20100302100A1 (en) * | 2009-06-01 | 2010-12-02 | Mstar Semiconductor, Inc. | Signal Processing Apparatus for Multi-mode Satellite Positioning System and Method Thereof |
| CN101629996A (en) * | 2009-08-18 | 2010-01-20 | 上海华测导航技术有限公司 | Radio frequency structure for realizing function of switching dual-band GPS satellite signal into base band signal |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882536A (en) * | 2012-08-28 | 2013-01-16 | 叶松 | Radio frequency receiver of BeiDou radio determination satellite service (RDSS) satellite navigation system |
| CN102882536B (en) * | 2012-08-28 | 2014-07-09 | 叶松 | Radio frequency receiver of BeiDou radio determination satellite service (RDSS) satellite navigation system |
| CN104135296A (en) * | 2014-07-12 | 2014-11-05 | 无锡中星微电子有限公司 | Adjustable intermediate frequency wireless receiver and Bluetooth module |
| CN104135296B (en) * | 2014-07-12 | 2017-03-15 | 无锡中星微电子有限公司 | Adjustable mean frequency wireless receiver and bluetooth module |
| 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 |
| CN104868883A (en) * | 2015-05-08 | 2015-08-26 | 长安大学 | Signal processing circuit for output signal of acoustic surface wave oscillator |
| CN108303587A (en) * | 2017-01-12 | 2018-07-20 | 北京普源精电科技有限公司 | Improve the spectrum analyzer that bottom is made an uproar |
| CN108072884A (en) * | 2017-09-18 | 2018-05-25 | 西安交通大学 | Global positioning system and Beidou satellite navigation system single channel dual-mode radio frequency receiver |
| CN107659321A (en) * | 2017-11-06 | 2018-02-02 | 深圳市夸克云电子信息技术有限公司 | A kind of AIS single-channel receivers of automatic frequency-hopping |
| CN107659321B (en) * | 2017-11-06 | 2020-05-08 | 深圳市夸克云电子信息技术有限公司 | Automatic frequency hopping AIS single channel receiver |
| CN109581417A (en) * | 2018-11-29 | 2019-04-05 | 金石临(广州)科技有限公司 | A kind of dual-mode radio frequency signal receiving device and method of reseptance |
| CN109889218A (en) * | 2019-04-02 | 2019-06-14 | 成都云溯新起点科技有限公司 | A kind of identification of single channel co-channel interference and counteracting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102243308A (en) | Single-channel radiofrequency receiver and frequency planning method thereof | |
| CN102243313A (en) | Dual-channel radio frequency receiver and frequency planning method thereof | |
| US10101461B2 (en) | Radio frequency circuit structure for implementing function of converting GNSS satellite signal into baseband signal | |
| CN102231636B (en) | Radio frequency front end device of receiver and signal receiving method thereof | |
| CN108872925B (en) | Four-channel multi-frequency-band satellite navigation signal receiver | |
| US9766347B2 (en) | Receiver for receiving a plurality of GNSS (Global Navigation Satellite System) signals | |
| EP1947777A2 (en) | Multi-band RF receiver | |
| US8306154B2 (en) | Multi-frequency band receiver | |
| CN105549038B (en) | L1 and L2 two-band satellite navigation receiver RF front-end circuits | |
| CN102323600A (en) | System architecture of dual-channel navigation radio-frequency receiver | |
| CN101908896B (en) | Multi-frequency band radio-frequency receiver | |
| CN210351144U (en) | Multimode multiband three-channel radio frequency receiver | |
| EP2965435B1 (en) | Simultaneous signal receiver with interspersed frequency allocation | |
| CN110907962A (en) | Beidou double-frequency satellite signal radio frequency receiver | |
| CN102445699A (en) | System structure for double-channel navigating radio-frequency receiver sharing radio-frequency front end | |
| CN202182942U (en) | Global navigation system double-channel radio frequency receiver with low power consumption | |
| US8213879B2 (en) | Radio-frequency signal reception and/or transmission device with noise reduction | |
| KR100895886B1 (en) | A dual band gps/galileo satellite receiver | |
| CN202305808U (en) | Dual-channel navigation RF (radio-frequency) receiver system architecture on front end of shared RF | |
| CN102508262B (en) | Double-channel radiofrequency receiver capable of realizing multiplex analog-to-digital conversion output and data processing method of double-channel radiofrequency receiver | |
| CN102928856A (en) | Global positioning system (GPS) and Beidou double-module navigation radio frequency receiving system | |
| US10228469B2 (en) | Reception device | |
| CN106547007B (en) | Dual-channel multimode navigation radio frequency receiving circuit | |
| CN113037307B (en) | Satellite receiver chip and satellite receiver system | |
| JP5015833B2 (en) | CIC filter, filter system, and satellite signal receiving circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111116 |