CN104038299A - Frequency sweeping device and signal processing method - Google Patents

Frequency sweeping device and signal processing method Download PDF

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Publication number
CN104038299A
CN104038299A CN201410276959.8A CN201410276959A CN104038299A CN 104038299 A CN104038299 A CN 104038299A CN 201410276959 A CN201410276959 A CN 201410276959A CN 104038299 A CN104038299 A CN 104038299A
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link
gain value
value
unit
numerical control
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CN104038299B (en
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施锋
朱宇霞
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Datang Lianyi Technology Co., Ltd.
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Beijing Northern Fiberhome Technologies Co Ltd
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Abstract

An embodiment of the invention provides a frequency sweeping device and a signal processing method. The frequency sweeping device comprises a base band processing module, a radio frequency signal receiving module, a digital-analog conversion module and an analog-digital conversion module, and the digital-analog conversion module and the analog-digital conversion module are connected with the base band processing module respectively. The signal processing method includes that the base band processing module controls a local oscillator processing unit in the radio frequency signal receiving module to provide local oscillator signals to a frequency mixing processing unit according to radio frequency signals received by a frequency point configured by a user; when the circumstance that a radio frequency signal local oscillator is configured successfully by the frequency mixing processing unit is detected, a target link gain value of a radio frequency link is determined; a variable gain amplifying unit and a numerical control attenuation unit in the radio frequency signal receiving module are adjusted to enable a current link gain value and the target link gain value of the radio frequency link to be within a preset error range; when the current link gain value and the target link gain value are within the preset error range, data processing is performed on the radio frequency signals. By the frequency sweeping device and the signal processing method, wide-dynamic-range radio frequency signals can be received effectively while signal processing efficiency is ensured.

Description

Frequency-sweeping apparatus and signal processing method
Technical field
The application relates to communication technical field, relates in particular a kind of frequency-sweeping apparatus and signal processing method.
Background technology
Frequency-sweeping apparatus is the measuring instrument of each stage indispensability in networking, can provide reliable analysis data for applied in network performance test and network optimization test etc.
Along with the development of mobile communication technology and arranging net on a large scale of mobile operator, mobile operator also has higher requirement to the sweep velocity of frequency-sweeping apparatus, the radiofrequency signal dynamic range that frequency-sweeping apparatus receives simultaneously also increases gradually, how therefore a kind of frequency-sweeping apparatus be provided, make it possible to effectively receive the radiofrequency signal of wide dynamic range, and the processing speed that ensures radiofrequency signal, becomes those skilled in the art's technical problem in the urgent need to address.
Summary of the invention
In view of this, the application provides a kind of frequency-sweeping apparatus and signal processing method, makes it possible to effectively receive the radiofrequency signal that dynamic range is larger, and has improved the processing speed of radiofrequency signal.
For achieving the above object, the application provides following technical scheme:
A kind of frequency-sweeping apparatus, comprises baseband processing module, radiofrequency signal receiver module, the D/A switch module and the mould/number conversion module that are connected with described baseband processing module respectively;
Described radiofrequency signal receiver module comprises the antenna element, the first low noise amplification unit, the first filter unit, numerical control attenuation units, the second low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplifying unit, intermediate frequency filtering unit and the variable gain amplifying unit that connect successively, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation units, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplifying unit is connected with described D/A switch module and described mould/number conversion module respectively;
The radiofrequency signal that described baseband processing module receives at user configured frequency according to described radiofrequency signal receiver module, controls described local oscillator processing unit and provides local oscillation signal to described Frequency mixing processing unit; In the time described Frequency mixing processing unit being detected described radiofrequency signal local oscillator configuration successful, determine the target link yield value of radio frequency link; Adjust described variable gain amplifying unit and described numerical control attenuation units, make the current link gain value of radio frequency link and described target link yield value in default error range; In the time that current link gain value and described target link yield value are in default error range, described radiofrequency signal is carried out to data processing.
Preferably, described baseband processing module is adjusted described variable gain amplifying unit and described numerical control attenuation units, and current link gain value and target link yield value are comprised in default error range:
Obtain current link gain value;
Calculate current link gain value deduct described target link yield value obtain link adjust difference;
Adjust difference when described link and exceed default error range, and described link adjusts difference and be greater than at 0 o'clock, the maxgain value of calculating described variable gain amplifying unit deducts its current gain value and obtains the first adjustment allowance;
Be greater than described link adjustment difference if described first adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be less than described link adjustment difference if described first adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described maxgain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation units, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Adjust difference when described link and exceed described predicated error scope, and described link adjusts difference and be less than at 0 o'clock, the minimum gain value that calculates described variable gain amplifying unit deducts its current gain value and obtains the second adjustment allowance;
Be less than described link adjustment difference if described second adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be greater than described link adjustment difference if described second adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described minimum gain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, reduce the gain compensation value of described numerical control attenuation units simultaneously, return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range.
Preferably, described baseband processing module is in the time that described link adjustment difference exceeds default error range, when the adjustment number of times that detects described variable gain amplifying unit or described numerical control attenuation units is greater than the first preset times, stop the adjustment to described variable gain amplifying unit or described numerical control attenuation units.
Preferably, described baseband processing module is in the time detecting described radiofrequency signal local oscillator configuration failure, control described local oscillator processing unit and repeat to provide local oscillation signal to described Frequency mixing processing unit, until detect that described Frequency mixing processing unit is greater than the second preset times to described radiofrequency signal local oscillator configuration successful or number of repetition.
Preferably, described the first filter unit comprises multiple filters of the radiofrequency signal for filtering at least two kinds of communication standard different frequency ranges;
Described radiofrequency signal receiver module also comprises:
Be arranged on the first multi-channel rf switch between described the first low noise amplification unit and described the first filter unit, for select the filter of the radiofrequency signal of a frequency range for filtering a kind of communication standard from described the first filter unit;
Be arranged on the amplitude limit unit between described antenna element and described the first low noise amplification unit;
Be arranged on low-pass filter unit and broadband amplifying unit between described Frequency mixing processing unit and described local oscillator processing unit;
Be arranged on the 3rd low noise amplification unit between described intermediate frequency filtering unit and described variable gain amplifying unit;
Be arranged on the second multi-channel rf switch and the second filter unit between described the second low noise amplification unit and described Frequency mixing processing unit, described the second filter unit comprises and one to one filter identical with described the first filter unit, and described the second multi-channel rf switch is for selecting and a selecteed filter that filter is corresponding described the first filter unit from described the second filter unit.
Preferably, described frequency-sweeping apparatus also comprises that the local terminal being connected with described baseband processing module safeguards backstage, for ask configure user parameter according to user; Show described radiofrequency signal data processed result.
A kind of signal processing method, is applied in frequency-sweeping apparatus, and described frequency-sweeping apparatus comprises baseband processing module, radiofrequency signal receiver module, the D/A switch module and the mould/number conversion module that are connected with described baseband processing module respectively; Described radiofrequency signal receiver module at least comprises the antenna element, the first low noise amplification unit, the first filter unit, numerical control attenuation units, the second low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplifying unit, intermediate frequency filtering unit and the variable gain amplifying unit that connect successively, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation units, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplifying unit is connected with described D/A switch module and described mould/number conversion module respectively;
Described method comprises:
Described in described baseband processing module control, Receiver Module gathers radiofrequency signal at user configured frequency;
Control described local oscillator processing unit and provide local oscillation signal to described Frequency mixing processing unit;
In the time detecting described radiofrequency signal local oscillator configuration successful, determine radio frequency link target link yield value;
Adjust described variable gain amplifying unit and described numerical control attenuation units, make current link gain value and described target link yield value in default error range;
In the time that current link gain value and described target link yield value are in default error range, described radiofrequency signal is carried out to data processing.
Preferably, the described variable gain amplifying unit of described adjustment and described numerical control attenuation units comprise:
Obtain current link gain value;
Calculate current link gain value deduct described target link yield value obtain link adjust difference;
Adjust difference when described link and exceed default error range, and described link adjusts difference and be greater than at 0 o'clock, the maxgain value of calculating described variable gain amplifying unit deducts current gain value and obtains the first adjustment allowance;
Be greater than described link adjustment difference if described first adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be less than described link adjustment difference if described first adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described maxgain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation units, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Adjust difference when described link and exceed described predicated error scope, and described link adjusts difference and be less than at 0 o'clock, the minimum gain value that calculates described variable gain amplifying unit deducts current gain value and obtains the second adjustment allowance;
Be less than described link adjustment difference if described second adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be greater than described link adjustment difference if described first adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described minimum gain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, reduce the gain compensation value of described numerical control attenuation units simultaneously, return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range.
Preferably, in the time that described link adjustment difference exceeds described predicated error scope, described method also comprises:
When the adjustment number of times that detects described variable gain amplifying unit or described numerical control attenuation units is greater than the first preset times, stop the adjustment to described variable gain amplifying unit or described numerical control attenuation units.
Preferably, in the time detecting described radiofrequency signal local oscillator configuration failure, described method also comprises:
Control described local oscillator processing unit and repeat to provide local oscillation signal to described Frequency mixing processing unit, until detect that described Frequency mixing processing unit is greater than the second preset times to described radiofrequency signal local oscillator configuration successful or number of repetition.
Known via above-mentioned technical scheme, compared with prior art, the application provides a kind of frequency-sweeping apparatus and signal processing method, described frequency-sweeping apparatus comprises baseband processing module, radiofrequency signal receiver module, and the D/A switch module being connected with baseband processing module respectively and mould/number conversion module, radiofrequency signal receiver module comprises variable gain amplifying unit and numerical control attenuation units.By the adjustment to variable gain amplifying unit and numerical control attenuation units, can realize the automatic gain control of radio frequency link, the radiofrequency signal receiving according to current configuration frequency, can adjust radio frequency link fast, thereby can complete frequency within a short period of time switches and ensures that radio frequency link is stable, therefore can effectively receive the radiofrequency signal that dynamic range is larger, and improve the treatment effeciency of radiofrequency signal, realize the object of rapid frequency-sweeping.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only the application's embodiment, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
The structural representation of the embodiment of a kind of frequency-sweeping apparatus that Fig. 1 provides for the embodiment of the present application;
The structural representation of a kind of another embodiment of frequency-sweeping apparatus that Fig. 2 provides for the embodiment of the present application;
The structural representation of a kind of another embodiment of frequency-sweeping apparatus that Fig. 3 provides for the embodiment of the present application;
The flow chart of the embodiment of a kind of signal processing method that Fig. 4 provides for the embodiment of the present application;
A kind of flow chart that may method of adjustment to variable gain amplifying unit and numerical control attenuation units in the signal processing method that Fig. 5 provides for the embodiment of the present application.
Body execution mode
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
The frequency-sweeping apparatus that the embodiment of the present application provides comprises baseband processing module, radiofrequency signal receiver module, and the D/A switch module being connected with baseband processing module respectively and mould/number conversion module, radiofrequency signal receiver module comprises variable gain amplifying unit and numerical control attenuation units.By the adjustment to variable gain amplifying unit and numerical control attenuation units, can realize the automatic gain control of radio frequency link, the radiofrequency signal receiving according to current configuration frequency, can adjust radio frequency link fast, thereby can complete frequency within a short period of time switches and ensures that radio frequency link is stable, therefore can effectively receive the radiofrequency signal that dynamic range is larger, and improve the treatment effeciency of radiofrequency signal, realize the object of rapid frequency-sweeping.
The structural representation of the embodiment of a kind of frequency-sweeping apparatus that Fig. 1 provides for the embodiment of the present application, this described frequency-sweeping apparatus can comprise:
Baseband processing module 101, radiofrequency signal receiver module 102, and the D/A switch module 103 being connected with baseband processing module 101 respectively and mould/number conversion module 104.
Wherein, radiofrequency signal receiver module 102 is for gathering radiofrequency signal; D/A switch module 103 and mould/number conversion module 104 are for realizing the conversion between analog signal and digital signal, to facilitate the communication between baseband processing module 101 and radiofrequency signal receiver module 102;
As a kind of possible implementation, in the present embodiment, described radiofrequency signal receives 102 and can comprise:
The antenna element 201, the first low noise amplification unit 202, the first filter unit 203, numerical control attenuation units 204, the second low noise amplification unit 205, Frequency mixing processing unit 206, intermediate frequency amplifying unit 207, intermediate frequency filtering unit 208 and the variable gain amplifying unit 209 that connect successively;
And the local oscillator processing unit 210 being connected with described Frequency mixing processing unit 206.
Antenna element 201 is for received RF signal;
The first low noise amplification unit 202 amplifies processing for the radiofrequency signal that antenna element 201 is received; The gain amplifier of the first low noise amplification unit 202 is fixed gain, and unit is decibel (dB).
The first filter unit 203 carries out the filtering pre-selection process of inband signaling for the first low noise amplification unit 202 is amplified to the radiofrequency signal of processing;
Numerical control attenuation units 204 is for carrying out gain compensation to the radiofrequency signal after the first filter unit 203 filtering pre-selection process.
The radiofrequency signal of the second low noise amplification unit 205 after for logarithm controlling attenuation unit 204 gain compensations amplified processing; The gain amplifier of the second low noise amplification unit 205 is fixed gain, and unit is dB.
Local oscillator processing unit 210 is for providing local oscillation signal to Frequency mixing processing unit 206.
The local oscillation signal of Frequency mixing processing unit 206 for providing according to local oscillator processing unit 210, amplifies radiofrequency signal after treatment to the second low noise amplification unit 205 and carries out down conversion process, obtains intermediate-freuqncy signal;
Intermediate frequency amplifying unit 207 is for amplifying processing to the radiofrequency signal after Frequency mixing processing unit 206 down conversion process.
Intermediate frequency filtering unit 208 carries out filtering processing for intermediate frequency amplifying unit is amplified to the radiofrequency signal of processing.
Variable gain amplifying unit 209, for according to the gain of configuration, carries out gain amplification disposal to the radiofrequency signal of intermediate frequency filter unit 208 filtering processing.
The signal that variable gain amplifying unit 209 carries out after gain amplification disposal can be converted into digital signal by mould/number conversion module 104, carries out data processing by baseband processing module 101, for example, realize the operation such as Cell searching and cell information parsing.
Can effectively receive at a high speed in order to realize radiofrequency signal receiver module the radiofrequency signal that dynamic range is larger, in the embodiment of the present application, by baseband processing module 101, radio frequency signal receiving module is controlled, receive the larger radiofrequency signal of dynamic range to realize, and in the time receiving the radiofrequency signal of different range, can control fast radio frequency link stable, make to complete within a short period of time frequency and switch and link adjustment, improve the efficiency of data processing, realize the object of rapid frequency-sweeping.
Concrete, in the present embodiment, baseband processing module 101 is connected with numerical control attenuation units 204, local oscillator processing unit 210 respectively.
Variable gain amplifying unit 209 is connected with D/A switch module 103 and mould/number conversion module 104 respectively, and therefore baseband processing module 101 can be realized the control to variable gain amplifying unit 209 by mould/number conversion module 104 or D/A switch module 103.
Certainly, the frequency-sweeping apparatus that the embodiment of the present application provides must also comprise power supply unit, clock unit etc., is connected respectively, to ensure the normal operation of frequency-sweeping apparatus with baseband processing module.
Wherein, the sequential of baseband processing module 101 completion system clocks, power supply and each chip configuration.Frequency-sweeping apparatus starts, and the radio frequency link Path Setup of radiofrequency signal receiver module 102, can be at user configured frequency received RF signal.
Because the radiofrequency signal dynamic range receiving is larger, in order to ensure the rapid adjustment of high-speed receiving and radio frequency link of radiofrequency signal, improve data-handling efficiency, the radiofrequency signal that described baseband processing module 101 receives at user configured frequency according to described radiofrequency signal receiver module 102, controls described local oscillator processing unit 210 and provides local oscillation signal to described Frequency mixing processing unit 206; In the time detecting that described Frequency mixing processing unit 206 shakes configuration successful to radio frequency code book, determine radio frequency link target link yield value; Adjust described variable gain amplifying unit 209 and described numerical control attenuation units 204, make current link gain value and target link yield value in default error range; In the time that current link gain value and target link yield value are in default error range, described radiofrequency signal is carried out to data processing.
First baseband processing module is controlled local oscillator processing unit and is provided local oscillation signal to Frequency mixing processing unit, to realize the local oscillator configuration to radiofrequency signal; When local oscillator configuration successful, local oscillator processing unit can feed back id signal to baseband processing module, and baseband processing module detects after this feedback id signal, can determine local oscillator configuration successful.
When baseband processing module is determined local oscillator configuration successful, can determine the target link yield value of radio frequency link, be also the radio frequency link that radiofrequency signal receiver module forms, the control target link yield value of the radiofrequency signal that current configuration frequency is received.
The optimized parameter of mould/number conversion module interface that this target link yield value can determine according to the current signal to noise ratio of mould/number conversion module (SNR, Signal to Noise Ratio) characteristic is determined, to realize automatic gain control.
Baseband processing module is determined after target link yield value, can be by adjusting described variable gain amplifying unit and described numerical control attenuation units, make current link gain value and this target link yield value in default error range, make current link gain value near this target link yield value, to guarantee the stability of radio frequency link, realize the fast processing of radiofrequency signal.
If current link gain value and described target link yield value in the time presetting in error range, show that radio frequency link is stable, thereby can carry out data processing to described radiofrequency signal.
In the frequency-sweeping apparatus that the embodiment of the present application provides, in radiofrequency signal receiver module, be provided with numerical control attenuation units and variable gain amplifying unit, make frequency-sweeping apparatus can realize the automatic gain control to radio frequency link, thereby the radiofrequency signal receiving according to current configuration frequency, can carry out to radio frequency link the adjustment of fast and stable, can complete frequency within a short period of time switches and link adjustment, thereby make frequency-sweeping apparatus can receive the radiofrequency signal that dynamic range is larger, can realize fast signal processing, realize the object of rapid frequency-sweeping.
Wherein, baseband processing module 101 is adjusted variable gain amplifying unit 209 and numerical control attenuation units 206, make current link gain value and target link yield value can have multiple possible implementation in default error range, in a kind of possibility implementation, baseband processing module 101 specifically can, by carrying out following operation, be realized the adjustment to variable gain amplifying unit 209 and numerical control attenuation units 206:
(1) obtain current link gain value.
Wherein, current link gain value characterizes the current power of frequency-sweeping apparatus, can, by calculating the RSSI (Received Signal Strength Indication, the signal strength signal intensity instruction of reception) of radio frequency link, after digital filtering, take the logarithm and be converted into dB value.
Wherein, target link yield value characterizes the expected gain value of frequency-sweeping apparatus under the frequency of current configuration, can process fast and effectively radiofrequency signal.
Mould/number conversion module interface optimized parameter that this target link yield value can determine according to the current signal to noise ratio of mould/number conversion module (SNR, Signal to Noise Ratio) characteristic is determined.
(2) calculate current link gain value deduct described target link yield value obtain link adjust difference.
Target setting link gain value is AGC_GOAL, and current link gain value is RSSI_dB.
Link is adjusted difference Delta=RSSI_dB-AGC_GOAL
(3) adjust difference when described link and exceed default error range, and described link adjusts difference and be greater than at 0 o'clock, the maxgain value of calculating described variable gain amplifying unit deducts current gain value and obtains the first adjustment allowance.
Setting default error is a, if | Delta| < a, can show that Delta is in default error range, | Delta| > a, thinks and exceeds default error range.| Delta|=a can think Delta in default error range or exceed default error range.
In the time that Delta exceeds default error range, and when Delta > 0, first adjusts allowance Margin1=VGA_MAX-CURRENT_VGA.
VGA_MAX is the maxgain value of variable gain amplifying unit, and CURRENT_VGA is the current gain value of variable gain amplifying unit.
(4) if being greater than described link, described the first adjustment allowance adjusts difference, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to (1) and continue to carry out, until current link gain value and target link yield value are in default error range.
Margin1 > Delta, illustrates that variable gain unit also has the space of adjusting, and the yield value of adjusting variable gain amplifying unit is NEW_GAIN=CURRENT_VGA+Delta.
Now NEW_GAIN becomes the current gain value of variable gain amplifying unit.
After the yield value of adjustment variable gain amplifying unit is NEW_GAIN, now current link gain value also can change, and therefore returns to (1) and continues to carry out, and carries out the adjustment of next round.
(5) if being less than described link, described the first adjustment allowance adjusts difference, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described maxgain value, and return and obtain (1) continuation execution, until current link gain value and target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation units, and return to (1) and continue to carry out, until current link gain value and target link yield value are in default error range.
If Margin1<Delta, now judges and the state of numerical control attenuation units if numerical control attenuation units is unattenuated, just the gain of variable gain amplifying unit is adjusted into NEW_GAIN=VGA_MAX; Now NEW_GAIN becomes the current gain value of variable gain amplifying unit.After the yield value of adjustment variable gain amplifying unit is NEW_GAIN, current link gain value also can change, and therefore returns to (1) and continues to carry out, and carries out the adjustment of next round.
And if numerical control attenuation units decays, numerical control attenuation units is set to unattenuated state, adjust variable gain amplifying unit yield value is NEW_GAIN=CURRENT_VGA+Delta+DATT_OPEN simultaneously.
DATT_OPEN is the gain compensation value of numerical-control attenuator.Now NEW_GAIN becomes the current gain value of variable gain amplifying unit.After the yield value of adjustment variable gain amplifying unit is NEW_GAIN, current link gain value also can change, and therefore returns to (1) and continues to carry out, and carries out the adjustment of next round.
(6) adjust difference when described link and exceed described predicated error scope, and described link adjusts difference and be less than at 0 o'clock, the minimum gain value that calculates described variable gain amplifying unit deducts current gain value and obtains the second adjustment allowance.
If in the time that Delta exceeds default error range, and when Delta < 0, calculate second and adjust allowance Margin2=VGA_MIN-CURRENT_VGA.
VGA_MIN is the minimum gain value of variable gain amplifying unit.
(7) if being less than described link, described the second adjustment allowance adjusts difference, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and the step of returning to (1) continues to carry out, until current link gain value and target link yield value are presetting in error range.
Margin2 < Delta, illustrates that variable gain unit also has the space of adjusting, and the yield value of adjusting variable gain amplifying unit is NEW_GAIN=CURRENT_VGA+Delta.
Now NEW_GAIN becomes the current gain value of variable gain amplifying unit.
After the yield value of adjustment variable gain amplifying unit is NEW_GAIN, now current link gain value also can change, and therefore returns to (1) and continues to carry out, and carries out the adjustment of next round.
(8) if being greater than described link, described the second adjustment allowance adjusts difference, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described minimum gain value, and return to (1) and continue to carry out, until current link gain value and target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, reduce the gain compensation value of described numerical control attenuation units simultaneously, return to (1) and continue to carry out, until current link gain value and target link yield value are in default error range.
If Margin2 > is Delta, now judge the state of numerical control attenuation units, if the decay of numerical control attenuation units is just adjusted into NEW_GAIN=VGA_MIN by the gain of variable gain amplifying unit; Now NEW_GAIN becomes the current gain value of variable gain amplifying unit.After the yield value of adjustment variable gain amplifying unit is NEW_GAIN, current link gain value also can change, and therefore returns to (1) and continues to carry out, and carries out the adjustment of next round.
And if numerical control attenuation units is unattenuated, numerical control attenuation units is set to attenuation state, and adjust variable gain amplifying unit yield value is NEW_GAIN=CURRENT_VGA+Delta-DATT_OPEN simultaneously.Now NEW_GAIN becomes the current gain value of variable gain amplifying unit.After the yield value of adjustment variable gain amplifying unit is NEW_GAIN, current link gain value also can change, and therefore returns to (1) and continues to carry out, and carries out the adjustment of next round.
Baseband processing module 101 is by carrying out the operation of (1)～(8), can realize fast radio frequency link adjustment, can complete frequency switching within a short period of time time, quick-recovery link is stable soon, makes effectively to receive the radiofrequency signal that dynamic range is larger.
Wherein, for fear of the wasting of resources, if baseband processing module 101 detects when the adjustment number of times of variable gain amplifying unit 209 or described numerical control attenuation units 204 is greater than to the first preset times, can stop the adjustment to variable gain amplifying unit or described numerical control attenuation units, can also directly carry out data processing to radiofrequency signal simultaneously.
Wherein, baseband processing module 101 is controlled local oscillator processing unit 210 and is provided local oscillation signal to Frequency mixing processing unit 206, to trigger Frequency mixing processing unit 206, radiofrequency signal is carried out to local oscillator configuration; If when local oscillator configuration failure, baseband processing module 101 can be controlled local oscillator processing unit 210 and repeat to provide local oscillation signal to Frequency mixing processing unit 206, until described radiofrequency signal local oscillator configuration successful; Certainly,, for the waste of minimizing data, if detect when number of repetition is greater than the second preset times, can directly stop local oscillator configuration.
Wherein, when baseband processing module 101 provides local oscillation signal according to user configured each frequency control local oscillator processing unit 210, all need variable gain unit and numerical control attenuation units to carry out corresponding initial configuration, initial configuration parameter comprises the yield value of variable gain unit and the attenuation state of numerical control attenuation units etc., this initial configuration parameter can arrange according to the frequency of active user's configuration, and the initial configuration parameter that each frequency is corresponding may be different.
In order to facilitate user that configuration parameter and monitoring are set or to search frequency sweep result etc., as shown in Figure 1, described frequency-sweeping apparatus can also comprise that local terminal safeguards (LMT, Local Maintenance Terminal) backstage 105, this LMT backstage 105 has configure user parameter and Presentation Function etc., it can ask configure user parameter according to user, and can show data processed result of radiofrequency signal etc.Customer parameter comprises the initial configuration parameter of Frequency Band Selection, local oscillator configuration parameter, frequency configuration parameter and each chip etc.
Certainly, as other possible implementation, in radiofrequency signal receiver module in the frequency-sweeping apparatus that the embodiment of the present application provides, the first low noise amplification unit can also be arranged between the first filter unit and numerical control attenuation units, thereby being radiofrequency signal that antenna element is received, the first filtering list carries out the filtering pre-selection process of inband signaling, the first low noise amplification unit is that the radiofrequency signal after the first filtering unit filters pre-selection process is amplified to processing, numerical control attenuation units is the first low noise amplification unit to be amplified to the radiofrequency signal of processing carry out gain compensation.
Certainly, radiofrequency signal receiver module can also adopt other forms to realize, for supporting can be to the frequency sweep of the radiofrequency signal under the different frequency range of different communication standard, as shown in Figure 2, the structural representation of a kind of another embodiment of frequency-sweeping apparatus providing for the embodiment of the present application, the radiofrequency signal receiver module 102 in described frequency-sweeping apparatus can comprise:
The antenna element 201, the first low noise amplification unit 202, the first multi-channel rf switch 211, the first filter unit 203, numerical control attenuation units 204, the second low noise amplification unit 205, Frequency mixing processing unit 206, intermediate frequency amplifying unit 207, intermediate frequency filtering unit 208 and the variable gain amplifying unit 209 that connect successively, and the local oscillator processing unit 210 being connected with described Frequency mixing processing unit 206.
In the present embodiment, described the first filter unit 203 comprises multiple filters of the radiofrequency signal of different frequency range at least two kinds of communication standards of filtration.
The first multi-channel rf switch 211 is for selecting the filter of the radiofrequency signal of a frequency range for filtering a kind of communication standard from described the first filter unit 203.
The selecteed filter of the first filter element 203 carries out inband signaling filtering pre-selection process for the first low noise amplification unit 202 is amplified to radiofrequency signal after treatment.
Shown in frequency-sweeping apparatus shown in Fig. 2 and Fig. 1, frequency-sweeping apparatus difference is:
Between described the first low noise amplification unit 201 and described the first filter unit 202, be provided with the first multi-channel rf switch 211; The first filter element 202 specifically comprises multiple filters of the radiofrequency signal of different frequency range at least two kinds of communication standards of filtration, thereby makes frequency-sweeping apparatus can support the reception of the radiofrequency signal of the different frequency range of at least two kinds of communication standards.Other structure members and annexation can refer to the corresponding embodiment of Fig. 1.
The concrete function of baseband processing module 101 can refer to described in the embodiment that Fig. 1 is corresponding, and its control local oscillator layoutprocedure and radio frequency link adjustment process are identical with the corresponding embodiment of Fig. 1, do not repeat them here.
Wherein, the first multi-channel rf switch 211 can be connected with baseband processing module 101, baseband processing module 101 can generate control command according to customer parameter, and control the first multi-channel rf switch 211 is selected the filter of the radiofrequency signal of a frequency range for filtering a kind of communication standard from the first filter element 202.
As another embodiment, in Fig. 2, the first low noise amplification unit can also be arranged between the first filter unit and numerical control attenuation units, and the first filter unit is connected with antenna element.The first filtering list is the filtering pre-selection process that radiofrequency signal that antenna element is received is carried out inband signaling, the first low noise amplification unit is that the radiofrequency signal after the first filtering unit filters pre-selection process is amplified to processing, and numerical control attenuation units is the first low noise amplification unit to be amplified to the radiofrequency signal of processing carry out gain compensation.
As another embodiment, shown in Figure 3, the radiofrequency signal receiver module 102 of this frequency-sweeping apparatus can comprise:
The antenna element 201 connecting successively, amplitude limit unit 212, the first low noise amplification unit 202, the first multi-channel rf switch 211, the first filter unit 203, numerical control attenuation units 204, the second low noise amplification unit 205, the second multi-channel rf switch 213, the second filter unit 214, Frequency mixing processing unit 206, intermediate frequency amplifying unit 207, intermediate frequency filtering unit 208, the 3rd low noise amplification unit 215 and variable gain amplifying unit 209, and the low-pass filter unit 215 being connected with described Frequency mixing processing unit 206, the broadband amplifying unit 217 being connected with low-pass filter unit 216, the local oscillator processing unit 210 being connected with broadband amplifying unit 217.
Described in Fig. 3, in frequency-sweeping apparatus, radiofrequency signal receiver module 102 is with radiofrequency signal receiver module 102 differences of frequency-sweeping apparatus shown in Fig. 2:
Before the first low noise amplification unit 202, be provided with amplitude limit unit 212, this amplitude limit unit 212 carries out amplitude limiting processing for the radiofrequency signal that antenna element 201 is received, and therefore the first low noise amplification unit 202 specifically amplifies processing to the radiofrequency signal of carrying out after amplitude limiting processing.
Between the second low noise amplification unit 205 and Frequency mixing processing unit 206, be provided with the second multi-channel rf switch 213 and the second filter unit 214.
Low-pass filter unit 216 and broadband amplifying unit 217 are set between Frequency mixing processing unit 206 and local oscillator processing unit 210.
The 3rd low noise amplification unit 215 is set between intermediate frequency filtering unit 208 and variable gain amplifying unit 209, amplify processing for the radiofrequency signal that intermediate frequency filter unit 201 is processed, therefore variable gain amplifying unit specifically carries out gain amplification disposal to the radiofrequency signal after the 3rd low noise amplification cell processing.
The second filter unit 214 comprises and one to one filter identical with described the first filter unit 203, and described the second multi-channel rf switch 213 is for selecting and the selecteed filters that filter is corresponding described the first filter unit 203 from described the second filter unit 214.
In the second filter unit 214, a selecteed filter is for carrying out the inhibition processing of mirror image interference to the radiofrequency signal of the second low noise amplification cell processing.
Wherein, the second multi-channel rf switch 213 can be connected with baseband processing module 101, baseband processing module 101 can generate control command according to customer parameter, controls the second multi-channel rf switch 213 and from described the second filter unit 214, selects and a selecteed filter that filter is corresponding in described the first filter unit 203.
Broadband amplifying unit 216 amplifies processing for the local oscillation signal that described local oscillator processing unit is provided;
Low-pass filter unit 215 carries out harmonic wave inhibition processing for wide-band amplifier being amplified to the local oscillation signal of processing.
Thereby Frequency mixing processing unit 206, specifically for according to low-pass filter unit 215 local oscillation signal after treatment, the second filter unit radiofrequency signal after treatment being carried out to down conversion process, obtains intermediate-freuqncy signal.
Certainly, as another embodiment, frequency-sweeping apparatus shown in Fig. 3, Frequency mixing processing unit 206 can also directly be connected with local oscillator processing unit, and local oscillation signal is without processing and harmonic wave inhibition processing through amplifying.
As another embodiment, frequency-sweeping apparatus shown in Fig. 3 also can not comprise amplitude limit unit.
As another embodiment, frequency-sweeping apparatus shown in Fig. 4 also can not comprise the 3rd low noise amplification unit.
As another embodiment, shown in Fig. 4, in frequency-sweeping apparatus, the first low noise amplification unit can also be arranged between the first filter unit and numerical control attenuation units, and the first filter unit is connected with amplitude limit unit.
It should be noted that the frequency-sweeping apparatus structure shown in Fig. 1～Fig. 3 is the possible implementation of the frequency-sweeping apparatus that provides of the embodiment of the present application, the frequency-sweeping apparatus that the embodiment of the present application provides can also adopt other forms certainly, ensure that radiofrequency signal receiver module comprises numerical control attenuation units and variable gain amplifying unit, realizing automatic gain control by baseband processing module control.
The frequency-sweeping apparatus providing by the embodiment of the present application can effectively receive the radiofrequency signal that dynamic range is larger, and frequency is short switching time, can realize fast the stable modulation of radio frequency link.
In the embodiment of the present application, Frequency mixing processing unit can adopt frequency mixer, local oscillator processing unit can adopt Frequency Synthesizer, the first low noise amplification unit, the second low noise amplification unit are corresponding amplifier, numerical control attenuation units can adopt numerical-control attenuator (DATT, Digital Attenuator), variable gain amplifying unit can adopt variable gain amplifier (VGA, variable gain amplifier).
Mould/number conversion module adopts A/D converter (ADC, Analog to Digital Converter); D/A switch module adopts D/A converter (DAC, Digital to analog converter).
Amplitude limit unit can adopt amplitude limiter, and low-pass filter unit can adopt low pass filter, broadband amplifying unit can adopt wide-band amplifier etc.
The structural representation of the embodiment of a kind of signal processing method that Fig. 4 provides for the embodiment of the present application, described method can be applied in frequency-sweeping apparatus, and described frequency-sweeping apparatus comprises baseband processing module, radiofrequency signal receiver module, the D/A switch module and the mould/number conversion module that are connected with described baseband processing module respectively; Described radiofrequency signal receiver module at least comprises the antenna element, the first low noise amplification unit, the first filter unit, numerical control attenuation units, the second low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplifying unit, intermediate frequency filtering unit and the variable gain amplifying unit that connect successively, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation units, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplifying unit is connected with described D/A switch module and described mould/number conversion module respectively.Described frequency-sweeping apparatus can be specially the frequency-sweeping apparatus described in the arbitrary embodiment of Fig. 1～Fig. 4.
Described method can comprise following step:
401: described in baseband processing module control, Receiver Module gathers radiofrequency signal at user configured frequency.
402: control described local oscillator processing unit and provide local oscillation signal to Frequency mixing processing unit;
403: in the time detecting described radiofrequency signal local oscillator configuration successful, determine radio frequency link target link yield value.
404: adjust described variable gain amplifying unit and described numerical control attenuation units, make current link gain value and target link yield value in default error range.
405: in the time that current link gain value and described target link yield value are in default error range, described radiofrequency signal is carried out to data processing.
Wherein, adjust variable gain amplifying unit and described numerical control attenuation units, make current link gain value and target link yield value in default error range, can have multiple possibility implementation, as a kind of possible implementation, as shown in Figure 5, described adjustment variable gain amplifying unit and described numerical control attenuation units can comprise following step:
501: obtain current link gain value;
502: calculate current link gain value deduct described target link yield value obtain link adjust difference;
503: judge that described link adjustment difference, whether presetting in error range, if so, performs step 405, if not, execution step 504.
504: judge whether described link adjustment difference is greater than 0, if so, execution step 505, if not, execution step 511.
505: the maxgain value of calculating described variable gain amplifying unit deducts current gain value and obtains the first adjustment allowance.
506: judge whether described the first adjustment allowance is greater than described link and adjusts difference, if so, execution step 507, if not, execution step 508.
507: the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, return to step 501 and continue to carry out.
508: the attenuation state that detects described numerical control attenuation units.
509: when described numerical control attenuation units is unattenuated, the current gain value of adjusting described variable gain amplifying unit is described maxgain value, and returns to step 501.
510: when described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts the gain compensation value of difference and described numerical control attenuation units, and returns to step 502.
511: the minimum gain value that calculates described variable gain amplifying unit deducts current gain value and obtains the second adjustment allowance.
512: judge whether described the second adjustment allowance is greater than described link and adjusts difference, if not, execution step 513, if so, execution step 514.
513: the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and returns to step 501.
514: the attenuation state that detects described numerical control attenuation units.
515: when described numerical control attenuation units is unattenuated, the current gain value of adjusting described variable gain amplifying unit is described minimum gain value, and returns to step 501.
516:: when described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, reduces the gain compensation value of described numerical control attenuation units simultaneously, returns to step 501.
For fear of the wasting of resources, when the adjustment number of times that baseband processing module detects described variable gain amplifying unit or described numerical control attenuation units is greater than the first preset times, can stop the adjustment to described variable gain amplifying unit or described numerical control attenuation units.
Wherein, baseband processing module is in the time detecting described radiofrequency signal local oscillator configuration failure, and described method can also comprise:
Control described local oscillator processing unit and repeat to provide local oscillation signal to described Frequency mixing processing unit, until detect that described Frequency mixing processing unit is greater than the second preset times to described radiofrequency signal local oscillator configuration successful or number of repetition.
In the embodiment of the present application, baseband processing module is by the adjustment to variable gain amplifying unit and numerical control attenuation units, can realize the automatic gain control of radio frequency link, the radiofrequency signal receiving according to current configuration frequency, can adjust radio frequency link fast, thereby can complete within a short period of time, frequency switches and link is stable, makes it possible to effectively receive the radiofrequency signal that dynamic range is larger, and ensure the fast processing of radiofrequency signal, realized the object of rapid frequency-sweeping.
For aforesaid each embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the application is not subject to the restriction of described sequence of movement, because according to the application, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and related action and module might not be that the application is necessary.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.For the disclosed device of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates referring to method part.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the application.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the case of not departing from the application's spirit or scope, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a frequency-sweeping apparatus, is characterized in that, comprises baseband processing module, radiofrequency signal receiver module, the D/A switch module and the mould/number conversion module that are connected with described baseband processing module respectively;
Described radiofrequency signal receiver module comprises the antenna element, the first low noise amplification unit, the first filter unit, numerical control attenuation units, the second low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplifying unit, intermediate frequency filtering unit and the variable gain amplifying unit that connect successively, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation units, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplifying unit is connected with described D/A switch module and described mould/number conversion module respectively;
The radiofrequency signal that described baseband processing module receives at user configured frequency according to described radiofrequency signal receiver module, controls described local oscillator processing unit and provides local oscillation signal to described Frequency mixing processing unit; In the time described Frequency mixing processing unit being detected described radiofrequency signal local oscillator configuration successful, determine the target link yield value of radio frequency link; Adjust described variable gain amplifying unit and described numerical control attenuation units, make the current link gain value of radio frequency link and described target link yield value in default error range; In the time that current link gain value and described target link yield value are in default error range, described radiofrequency signal is carried out to data processing.
2. device according to claim 1, is characterized in that, described baseband processing module is adjusted described variable gain amplifying unit and described numerical control attenuation units, and current link gain value and target link yield value are comprised in default error range:
Obtain current link gain value;
Calculate current link gain value deduct described target link yield value obtain link adjust difference;
Adjust difference when described link and exceed default error range, and described link adjusts difference and be greater than at 0 o'clock, the maxgain value of calculating described variable gain amplifying unit deducts its current gain value and obtains the first adjustment allowance;
Be greater than described link adjustment difference if described first adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be less than described link adjustment difference if described first adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described maxgain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation units, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Adjust difference when described link and exceed described predicated error scope, and described link adjusts difference and be less than at 0 o'clock, the minimum gain value that calculates described variable gain amplifying unit deducts its current gain value and obtains the second adjustment allowance;
Be less than described link adjustment difference if described second adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be greater than described link adjustment difference if described second adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described minimum gain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, reduce the gain compensation value of described numerical control attenuation units simultaneously, return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range.
3. device according to claim 2, it is characterized in that, described baseband processing module is in the time that described link adjustment difference exceeds default error range, when the adjustment number of times that detects described variable gain amplifying unit or described numerical control attenuation units is greater than the first preset times, stop the adjustment to described variable gain amplifying unit or described numerical control attenuation units.
4. according to the device described in claim 1～3 any one, it is characterized in that, described baseband processing module is in the time detecting described radiofrequency signal local oscillator configuration failure, control described local oscillator processing unit and repeat to provide local oscillation signal to described Frequency mixing processing unit, until detect that described Frequency mixing processing unit is greater than the second preset times to described radiofrequency signal local oscillator configuration successful or number of repetition.
5. according to the device described in claim 1～3 any one, it is characterized in that, described the first filter unit comprises multiple filters of the radiofrequency signal for filtering at least two kinds of communication standard different frequency ranges;
Described radiofrequency signal receiver module also comprises:
Be arranged on the first multi-channel rf switch between described the first low noise amplification unit and described the first filter unit, for select the filter of the radiofrequency signal of a frequency range for filtering a kind of communication standard from described the first filter unit;
Be arranged on the amplitude limit unit between described antenna element and described the first low noise amplification unit;
Be arranged on low-pass filter unit and broadband amplifying unit between described Frequency mixing processing unit and described local oscillator processing unit;
Be arranged on the 3rd low noise amplification unit between described intermediate frequency filtering unit and described variable gain amplifying unit;
Be arranged on the second multi-channel rf switch and the second filter unit between described the second low noise amplification unit and described Frequency mixing processing unit, described the second filter unit comprises and one to one filter identical with described the first filter unit, and described the second multi-channel rf switch is for selecting and a selecteed filter that filter is corresponding described the first filter unit from described the second filter unit.
6. device according to claim 1, is characterized in that, described frequency-sweeping apparatus also comprises that the local terminal being connected with described baseband processing module safeguards backstage, for ask configure user parameter according to user; Show described radiofrequency signal data processed result.
7. a signal processing method, is characterized in that, is applied in frequency-sweeping apparatus, and described frequency-sweeping apparatus comprises baseband processing module, radiofrequency signal receiver module, the D/A switch module and the mould/number conversion module that are connected with described baseband processing module respectively; Described radiofrequency signal receiver module at least comprises the antenna element, the first low noise amplification unit, the first filter unit, numerical control attenuation units, the second low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplifying unit, intermediate frequency filtering unit and the variable gain amplifying unit that connect successively, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation units, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplifying unit is connected with described D/A switch module and described mould/number conversion module respectively;
Described method comprises:
Described in described baseband processing module control, Receiver Module gathers radiofrequency signal at user configured frequency;
Control described local oscillator processing unit and provide local oscillation signal to described Frequency mixing processing unit;
In the time detecting described radiofrequency signal local oscillator configuration successful, determine radio frequency link target link yield value;
Adjust described variable gain amplifying unit and described numerical control attenuation units, make current link gain value and described target link yield value in default error range;
In the time that current link gain value and described target link yield value are in default error range, described radiofrequency signal is carried out to data processing.
8. method according to claim 7, is characterized in that, the described variable gain amplifying unit of described adjustment and described numerical control attenuation units comprise:
Obtain current link gain value;
Calculate current link gain value deduct described target link yield value obtain link adjust difference;
Adjust difference when described link and exceed default error range, and described link adjusts difference and be greater than at 0 o'clock, the maxgain value of calculating described variable gain amplifying unit deducts current gain value and obtains the first adjustment allowance;
Be greater than described link adjustment difference if described first adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be less than described link adjustment difference if described first adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described maxgain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation units, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Adjust difference when described link and exceed described predicated error scope, and described link adjusts difference and be less than at 0 o'clock, the minimum gain value that calculates described variable gain amplifying unit deducts current gain value and obtains the second adjustment allowance;
Be less than described link adjustment difference if described second adjusts allowance, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, and return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range;
Be greater than described link adjustment difference if described first adjusts allowance, detect described numerical control attenuation units when unattenuated, the current gain value of adjusting described variable gain amplifying unit is described minimum gain value, and return to the step continuation execution of obtaining current link gain value, until current link gain value and target link yield value are in default error range; While detecting described numerical control attenuation units decay, control described numerical control attenuation units unattenuated, the current gain value of adjusting described variable gain amplifying unit increases described link and adjusts difference, reduce the gain compensation value of described numerical control attenuation units simultaneously, return to the step continuation execution of obtaining current link gain value, until current link gain value and described target link yield value are in default error range.
9. method according to claim 8, is characterized in that, in the time that described link adjustment difference exceeds described predicated error scope, described method also comprises:
When the adjustment number of times that detects described variable gain amplifying unit or described numerical control attenuation units is greater than the first preset times, stop the adjustment to described variable gain amplifying unit or described numerical control attenuation units.
10. according to the method described in claim 7～9 any one, it is characterized in that, in the time detecting described radiofrequency signal local oscillator configuration failure, described method also comprises:
Control described local oscillator processing unit and repeat to provide local oscillation signal to described Frequency mixing processing unit, until detect that described Frequency mixing processing unit is greater than the second preset times to described radiofrequency signal local oscillator configuration successful or number of repetition.
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CN112134599A (en) * 2020-09-17 2020-12-25 展讯通信（上海）有限公司 Frequency sweeping method, equipment, device and storage medium
CN112152738A (en) * 2020-09-25 2020-12-29 广州粒子微电子有限公司 NB-IoT-based rapid frequency sweeping method and device
CN112152738B (en) * 2020-09-25 2022-08-19 广州粒子微电子有限公司 NB-IoT-based rapid frequency sweeping method and device

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