CN104038299B - Frequency-sweeping apparatus and signal processing method - Google Patents

Abstract

The embodiment of the present application provides a kind of frequency-sweeping apparatus and signal processing method, and described device comprises baseband processing module, rf signal reception module, the D/A switch module being connected respectively and analog/digital conversion module with baseband processing module; The radiofrequency signal that the frequency that baseband processing module configures according to user receives, the local oscillator processing unit in control rf signal reception module provides local oscillation signal to Frequency mixing processing unit; When Frequency mixing processing unit radio frequency signal local oscillator configuration successful being detected, it is determined that the target chain gain value of radio frequency link; Variable gain in adjustment rf signal reception module amplifies unit and numerical control attenuation unit so that the current link gain value of radio frequency link and target chain gain value are in default limit of error; When current link gain value and target chain gain value are in default limit of error, radio frequency signal carries out data processing. The embodiment of the present application can effectively receive the radiofrequency signal of wide dynamic range, ensure that signal processing efficiency simultaneously.

Description

Frequency-sweeping apparatus and signal processing method

Technical field

The application relates to communication technical field, says more specifically and relates to a kind of frequency-sweeping apparatus and signal processing method.

Background technology

Frequency-sweeping apparatus is the surveying instrument of each stage indispensability in networking, it is possible to for applied in network performance test and network optimization test etc. provide reliable analytical data.

Along with the development of mobile communication technology and arranging net on a large scale of mobile operator, the frequency sweep speed of frequency-sweeping apparatus be it is also proposed higher requirement by mobile operator, the radiofrequency signal dynamicrange 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 ensure the processing speed of radiofrequency signal, become the technical problem that those skilled in the art are in the urgent need to address.

Summary of the invention

In view of this, this application provides a kind of frequency-sweeping apparatus and signal processing method so that can effectively receive the bigger radiofrequency signal of dynamicrange, and improve 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, rf signal reception module, the D/A switch module being connected respectively and analog/digital conversion module with described baseband processing module;

Described rf signal reception module comprises the antenna unit, the first low noise amplification unit, the first filter unit, numerical control attenuation unit, the 2nd low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplification unit, intermediate frequency filtering unit and the variable gain that connect successively and amplifies unit, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation unit, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplify unit respectively with described D/A switch module and described analog/digital conversion model calling;

The radiofrequency signal that described baseband processing module receives at the frequency that user configures according to described rf signal reception module, controlling described local oscillator processing unit provides local oscillation signal to described Frequency mixing processing unit; When described Frequency mixing processing unit being detected to described radiofrequency signal local oscillator configuration successful, it is determined that the target chain gain value of radio frequency link; Adjust described variable gain and amplify unit and described numerical control attenuation unit so that the current link gain value of radio frequency link and described target chain gain value are in default limit of error; When current link gain value and described target chain gain value are in default limit of error, described radiofrequency signal is carried out data processing.

Preferably, described baseband processing module adjusts described variable gain amplification unit and described numerical control attenuation unit so that current link gain value and target chain gain value comprise in default limit of error:

Obtain current link gain value;

Calculate current link gain value subtract described target chain gain value obtain link adjustment difference;

Exceed default limit of error when described link adjusts difference, and described link adjustment difference is when being greater than 0, calculate the maxgain value that described variable gain amplifies unit and subtract its current gain value and obtain the first adjustment allowance;

If described first adjustment allowance is greater than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described first adjustment allowance is less than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described maxgain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation unit, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

Exceed described predicated error scope when described link adjusts difference, and described link adjustment difference is when being less than 0, calculate the minimum gain value that described variable gain amplifies unit and subtract its current gain value and obtain the 2nd adjustment allowance;

If described 2nd adjustment allowance is less than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described 2nd adjustment allowance is greater than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described minimum gain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, reduce the gain compensation value of described numerical control attenuation unit simultaneously, return the step obtaining current link gain value to continue to perform, until current link gain value and described target chain gain value are in default limit of error.

Preferably, described baseband processing module is when described link adjustment difference exceeds default limit of error, detect the adjustment number of times that described variable gain amplifies unit or described numerical control attenuation unit when being greater than the first preset times, terminate described variable gain being amplified the adjustment of unit or described numerical control attenuation unit.

Preferably, described baseband processing module is when detecting described radiofrequency signal local oscillator and configure unsuccessfully, control described local oscillator processing unit to repeat to provide local oscillation signal to described Frequency mixing processing unit, until detecting that described radiofrequency signal local oscillator configuration successful or multiplicity are greater than the 2nd preset times by described Frequency mixing processing unit.

Preferably, described first filter unit comprises multiple wave filter of the radiofrequency signal for filtering different frequency range at least two kinds of communication standards;

Described rf signal reception module also comprises:

The the first multi-channel rf switch being arranged between described first low noise amplification unit and described first filter unit, for selecting the strainer of the radiofrequency signal for the frequency range filtering a kind of communication standard from described first filter unit;

The clipping unit being arranged between described antenna unit and described first low noise amplification unit;

The low-pass filter unit being arranged between described Frequency mixing processing unit and described local oscillator processing unit and wide-band amplify unit;

The 3rd low noise amplification unit being arranged between described intermediate frequency filtering unit and described variable gain amplification unit;

The 2nd multi-channel rf switch being arranged between described 2nd low noise amplification unit and described Frequency mixing processing unit and the 2nd filter unit, described 2nd filter unit comprises and one to one wave filter identical with described first filter unit, and described 2nd multi-channel rf switch is used for from described 2nd filter unit to select the wave filter corresponding with the wave filter selected in described first filter unit.

Preferably, described frequency-sweeping apparatus also comprises the local terminal being connected with described baseband processing module and safeguards backstage, for asking 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, rf signal reception module, the D/A switch module being connected respectively and analog/digital conversion module with described baseband processing module; Described rf signal reception module at least comprises the antenna unit, the first low noise amplification unit, the first filter unit, numerical control attenuation unit, the 2nd low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplification unit, intermediate frequency filtering unit and the variable gain that connect successively and amplifies unit, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation unit, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplify unit respectively with described D/A switch module and described analog/digital conversion model calling;

Described method comprises:

Described baseband processing module controls the frequency collection radiofrequency signal that described radio frequency reception module configures user;

Control described local oscillator processing unit and provide local oscillation signal to described Frequency mixing processing unit;

When detecting described radiofrequency signal local oscillator configuration successful, it is determined that radio frequency link target chain gain value;

Adjust described variable gain and amplify unit and described numerical control attenuation unit so that current link gain value and described target chain gain value are in default limit of error;

When current link gain value and described target chain gain value are in default limit of error, described radiofrequency signal is carried out data processing.

Preferably, described adjustment described variable gain amplification unit and described numerical control attenuation unit comprise:

Obtain current link gain value;

Calculate current link gain value subtract described target chain gain value obtain link adjustment difference;

Exceed default limit of error when described link adjusts difference, and described link adjustment difference is when being greater than 0, calculate the maxgain value that described variable gain amplifies unit and subtract current gain value and obtain the first adjustment allowance;

If described first adjustment allowance is greater than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described first adjustment allowance is less than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described maxgain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation unit, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

Exceed described predicated error scope when described link adjusts difference, and described link adjustment difference is when being less than 0, calculate the minimum gain value that described variable gain amplifies unit and subtract current gain value and obtain the 2nd adjustment allowance;

If described 2nd adjustment allowance is less than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described first adjustment allowance is greater than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described minimum gain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, reduce the gain compensation value of described numerical control attenuation unit simultaneously, return the step obtaining current link gain value to continue to perform, until current link gain value and described target chain gain value are in default limit of error.

Preferably, when described link adjustment difference exceeds described predicated error scope, described method also comprises:

Detect the adjustment number of times that described variable gain amplifies unit or described numerical control attenuation unit when being greater than the first preset times, terminate described variable gain being amplified the adjustment of unit or described numerical control attenuation unit.

Preferably, when detecting described radiofrequency signal local oscillator and configure unsuccessfully, described method also comprises:

Control described local oscillator processing unit to repeat to provide local oscillation signal to described Frequency mixing processing unit, until detecting that described radiofrequency signal local oscillator configuration successful or multiplicity are greater than the 2nd preset times by described Frequency mixing processing unit.

Known via above-mentioned technical scheme, compared with prior art, this application provides a kind of frequency-sweeping apparatus and signal processing method, described frequency-sweeping apparatus comprises baseband processing module, rf signal reception module, and the D/A switch module being connected with baseband processing module respectively and analog/digital conversion module, rf signal reception module comprises variable gain and amplifies unit and numerical control attenuation unit. By variable gain being amplified the adjustment of unit and numerical control attenuation unit, the automatic growth control of radio frequency link can be realized, according to the radiofrequency signal that current configuration frequency receives, can adjust by radio frequency link fast, such that it is able to complete frequency switching within a short period of time and ensure that radio frequency link is stablized, therefore, it is possible to effectively receive the bigger radiofrequency signal of dynamicrange, and improve the processing efficiency of radiofrequency signal, it is achieved that the object of rapid frequency-sweeping.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only the embodiment of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.

The structural representation of a kind of frequency-sweeping apparatus embodiment 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 schema of a kind of signal processing method embodiment that Fig. 4 provides for the embodiment of the present application;

Variable gain is amplified in the signal processing method that Fig. 5 provides for the embodiment of the present application a kind of of unit and numerical control attenuation unit may the schema of inflation method.

Embodiment

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, it is clear that described embodiment is only some embodiments of the present application, instead of whole embodiments. Based on the embodiment in the application, those of ordinary skill in the art are not making other embodiments all obtained 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, rf signal reception module, and the D/A switch module being connected with baseband processing module respectively and analog/digital conversion module, rf signal reception module comprises variable gain and amplifies unit and numerical control attenuation unit. By variable gain being amplified the adjustment of unit and numerical control attenuation unit, the automatic growth control of radio frequency link can be realized, according to the radiofrequency signal that current configuration frequency receives, can adjust by radio frequency link fast, such that it is able to complete frequency switching within a short period of time and ensure that radio frequency link is stablized, therefore, it is possible to effectively receive the bigger radiofrequency signal of dynamicrange, and improve the processing efficiency of radiofrequency signal, it is achieved that the object of rapid frequency-sweeping.

The structural representation of a kind of frequency-sweeping apparatus embodiment that Fig. 1 provides for the embodiment of the present application, this described frequency-sweeping apparatus can comprise:

Baseband processing module 101, rf signal reception module 102, and the D/A switch module 103 being connected with baseband processing module 101 respectively and analog/digital conversion module 104.

Wherein, rf signal reception module 102 is for gathering radiofrequency signal; The conversion for realizing between simulating signal and numerary signal of D/A switch module 103 and analog/digital conversion module 104, to facilitate the communication between baseband processing module 101 and rf signal reception module 102;

As a kind of possible implementation, in the present embodiment, described rf signal reception 102 can comprise:

Antenna unit 201, first low noise amplification unit 202, first filter unit 203, numerical control attenuation unit 204, the 2nd low noise amplification unit 205, Frequency mixing processing unit 206, intermediate frequency amplification unit 207, intermediate frequency filtering unit 208 and the variable gain that connect successively amplify unit 209;

And the local oscillator processing unit 210 being connected with described Frequency mixing processing unit 206.

Antenna unit 201 is for received RF signal;

First low noise amplification unit 202 is for carrying out amplification process to the radiofrequency signal that antenna unit 201 receives; The gain amplifier of the first low noise amplification unit 202 is fixed gain, and unit is decibel (dB).

First filter unit 203 for carrying out the filtering pre-selection process of in-band signalling to the radiofrequency signal of the first low noise amplification unit 202 amplification process;

Numerical control attenuation unit 204 is for carrying out gain compensation to the radiofrequency signal after the first filter unit 203 filtering pre-selection process.

2nd low noise amplification unit 205 is for carrying out amplification process to the radiofrequency signal after numerical control attenuation unit 204 gain compensation; The gain amplifier of the 2nd 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, the radiofrequency signal after the 2nd low noise amplification unit 205 amplification being processed carries out down conversion process, obtains intermediate frequency signal;

Intermediate frequency amplifies unit 207 for the radiofrequency signal after Frequency mixing processing unit 206 down conversion process is carried out amplification process.

Intermediate frequency filtering unit 208 carries out filtering process for intermediate frequency amplifies the radiofrequency signal of unit amplification process.

Variable gain amplifies unit 209 for the gain according to configuration, and the radiofrequency signal of intermediate frequency filter unit 208 filtering process is carried out gain amplification disposal.

Variable gain amplify unit 209 carry out gain amplification disposal after signal be namely converted into numerary signal by analog/digital conversion module 104, carry out data processing by baseband processing module 101, such as realize cell searching and cell information parsing etc. operation.

The bigger radiofrequency signal of dynamicrange can be effectively received at a high speed in order to realize rf signal reception module, in the embodiment of the present application, control by baseband processing module 101 radio frequency signal receiving module, the bigger radiofrequency signal of dynamicrange is received to realize, and when receiving the radiofrequency signal of different range, it is possible to control radio frequency link is stablized fast so that can complete frequency switching and link adjustment within a short period of time, improve the efficiency of data processing, it is achieved the object of rapid frequency-sweeping.

Concrete, in the present embodiment, baseband processing module 101 is connected with numerical control attenuation unit 204, local oscillator processing unit 210 respectively.

Variable gain is amplified unit 209 and is connected with D/A switch module 103 and analog/digital conversion module 104 respectively, and therefore baseband processing module 101 can realize the control that variable gain is amplified unit 209 by analog/digital 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 for electric unit, clock unit etc., is connected with baseband processing module respectively, to ensure the normal operation of frequency-sweeping apparatus.

Wherein, baseband processing module 101 completes the sequential configuration of system clock, power supply and each chip. Frequency-sweeping apparatus starts, and the radio frequency link passage of rf signal reception module 102 is set up, namely can at the frequency received RF signal of user's configuration.

Radiofrequency signal dynamicrange owing to receiving is bigger, in order to the rapid adjustment of the high-speed receiving and radio frequency link that ensure radiofrequency signal, improve data-handling efficiency, the radiofrequency signal that described baseband processing module 101 receives at the frequency that user configures according to described rf signal reception module 102, controlling described local oscillator processing unit 210 provides local oscillation signal to described Frequency mixing processing unit 206; When described Frequency mixing processing unit 206 radio frequency signal local oscillator configuration successful being detected, it is determined that radio frequency link target chain gain value; Adjust described variable gain and amplify unit 209 and described numerical control attenuation unit 204 so that current link gain value and target chain gain value are in default limit of error; When current link gain value and target chain gain value are in default limit of error, described radiofrequency signal is carried out data processing.

First baseband processing module controls local oscillator processing unit provides local oscillation signal to Frequency mixing processing unit, to realize the local oscillator configuration of radio frequency signal; During local oscillator configuration successful, local oscillator processing unit can feed back id signal to baseband processing module, after baseband processing module detects this feedback id signal, it may be determined that local oscillator configuration successful.

When baseband processing module determines local oscillator configuration successful, it may be determined that go out the target chain gain value of radio frequency link, also it is the radio frequency link of rf signal reception module generation, to the control objectives link gain value of the radiofrequency signal that current configuration frequency receives.

This target chain gain value can be determined according to the optimized parameter of the analog/digital conversion module interface that current signal to noise ratio (SNR, the SignaltoNoiseRatio) characteristic of analog/digital conversion module determines, to realize automatic growth control.

After baseband processing module determines target chain gain value, namely unit and described numerical control attenuation unit can be amplified by the described variable gain of adjustment, make current link gain value and this target chain gain value in default limit of error, make current link gain value near this target chain gain value, to guarantee the stability of radio frequency link, it is achieved the fast processing of radiofrequency signal.

If when current link gain value and described target chain gain value are in default limit of error, show that radio frequency link is stablized, thus namely described radiofrequency signal can be carried out data processing.

The frequency-sweeping apparatus that the embodiment of the present application provides is provided with in rf signal reception module numerical control attenuation unit and variable gain amplification unit, make frequency-sweeping apparatus can realize the automatic growth control of radio frequency link, thus according to the radiofrequency signal that current configuration frequency receives, the adjustment of fast and stable can be carried out by radio frequency link, frequency switching and link adjustment can be completed within a short period of time, so that frequency-sweeping apparatus can receive the bigger radiofrequency signal of dynamicrange, signal processing can be realized fast, it is achieved that the object of rapid frequency-sweeping.

Wherein, baseband processing module 101 adjusts variable gain and amplifies unit 209 and numerical control attenuation unit 206, make current link gain value and target chain gain value can have multiple possible implementation in default limit of error, in a kind of possibility implementation, baseband processing module 101 specifically can by performing following operation, it is achieved variable gain is amplified the adjustment of unit 209 and numerical control attenuation unit 206:

(1) current link gain value is obtained.

Wherein, current link gain value characterizes the current power of frequency-sweeping apparatus, by calculating the RSSI (ReceivedSignalStrengthIndication, the strength of signal instruction of reception) of radio frequency link, can take the logarithm after digital filtering and be converted into dB value.

Wherein, target chain gain value characterizes the expectation yield value of frequency-sweeping apparatus under the frequency of current configuration, can process radiofrequency signal fast and effectively.

This target chain gain value can be determined according to the mould that current signal to noise ratio (SNR, the SignaltoNoiseRatio) characteristic of analog/digital conversion module determines/number conversion module interface optimized parameter.

(2) calculate current link gain value subtract described target chain gain value obtain link adjustment difference.

Target setting link gain value is AGC_GOAL, and current link gain value is RSSI_dB.

Then link adjustment difference Delta=RSSI_dB-AGC_GOAL

(3) exceed default limit of error when described link adjusts difference, and described link adjustment difference is when being greater than 0, calculate the maxgain value that described variable gain amplifies unit and subtract current gain value and obtain the first adjustment allowance.

It is a that error is preset in setting, if | Delta | is < a, then can show that Delta is in default limit of error, and | Delta | > a, then think and exceed default limit of error. | Delta |=a can think that Delta or exceeds default limit of error in default limit of error.

When Delta exceeds default limit of error, and during Delta > 0, the first adjustment allowance Margin1=VGA_MAX-CURRENT_VGA.

VGA_MAX is the maxgain value that variable gain amplifies unit, and CURRENT_VGA is the current gain value that variable gain amplifies unit.

(4) if described first adjustment allowance is greater than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return (1) and continue to perform, until current link gain value and target chain gain value are in default limit of error.

Margin1 > Delta, illustrates that variable gain unit also has the space of adjustment, and it is NEW_GAIN=CURRENT_VGA+Delta that adjustment variable gain amplifies the yield value of unit.

Now namely NEW_GAIN becomes the current gain value that variable gain amplifies unit.

It is after NEW_GAIN that adjustment variable gain amplifies the yield value of unit, and now current link gain value also can change, and therefore returns (1) and continues to perform, carries out the adjustment that next is taken turns.

(5) if described first adjustment allowance is less than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described maxgain value, and return acquisition (1) and continue to perform, until current link gain value and target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation unit, and return (1) and continue to perform, until current link gain value and target chain gain value are in default limit of error.

If Margin1 < Delta, the now state of resulting number controlling attenuation unit, if numerical control attenuation unit is not decayed, the Gain tuning that variable gain is just amplified unit is NEW_GAIN=VGA_MAX; Now namely NEW_GAIN becomes the current gain value that variable gain amplifies unit. It is after NEW_GAIN that adjustment variable gain amplifies the yield value of unit, and current link gain value also can change, and therefore returns (1) and continues to perform, carries out the adjustment that next is taken turns.

And if numerical control attenuation unit decay, then numerical control attenuation unit is set to not attenuation state, simultaneously adjust variable gain amplify module gain value is NEW_GAIN=CURRENT_VGA+Delta+DATT_OPEN.

DATT_OPEN is the gain compensation value of numerical-control attenuator. Now namely NEW_GAIN becomes the current gain value that variable gain amplifies unit. It is after NEW_GAIN that adjustment variable gain amplifies the yield value of unit, and current link gain value also can change, and therefore returns (1) and continues to perform, carries out the adjustment that next is taken turns.

(6) exceed described predicated error scope when described link adjusts difference, and described link adjustment difference is when being less than 0, calculate the minimum gain value that described variable gain amplifies unit and subtract current gain value and obtain the 2nd adjustment allowance.

If when Delta exceeds default limit of error, and during Delta < 0, calculate the 2nd adjustment allowance Margin2=VGA_MIN-CURRENT_VGA.

VGA_MIN is the minimum gain value that variable gain amplifies unit.

(7) if described 2nd adjustment allowance is less than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and the step returning (1) continues to perform, until current link gain value and target chain gain value are in default limit of error.

Margin2 < Delta, illustrates that variable gain unit also has the space of adjustment, and it is NEW_GAIN=CURRENT_VGA+Delta that adjustment variable gain amplifies the yield value of unit.

Now namely NEW_GAIN becomes the current gain value that variable gain amplifies unit.

It is after NEW_GAIN that adjustment variable gain amplifies the yield value of unit, and now current link gain value also can change, and therefore returns (1) and continues to perform, carries out the adjustment that next is taken turns.

(8) if described 2nd adjustment allowance is greater than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described minimum gain value, and return (1) and continue to perform, until current link gain value and target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, reduce the gain compensation value of described numerical control attenuation unit simultaneously, return (1) to continue to perform, until current link gain value and target chain gain value are in default limit of error.

If Margin2 is > Delta, the now state of resulting number controlling attenuation unit, if the decay of numerical control attenuation unit, the Gain tuning that variable gain is just amplified unit is NEW_GAIN=VGA_MIN; Now namely NEW_GAIN becomes the current gain value that variable gain amplifies unit. It is after NEW_GAIN that adjustment variable gain amplifies the yield value of unit, and current link gain value also can change, and therefore returns (1) and continues to perform, carries out the adjustment that next is taken turns.

And if numerical control attenuation unit is not decayed, then numerical control attenuation unit being set to attenuation state, adjust variable gain amplification module gain value is NEW_GAIN=CURRENT_VGA+Delta-DATT_OPEN simultaneously. Now namely NEW_GAIN becomes the current gain value that variable gain amplifies unit. It is after NEW_GAIN that adjustment variable gain amplifies the yield value of unit, and current link gain value also can change, and therefore returns (1) and continues to perform, carries out the adjustment that next is taken turns.

Baseband processing module 101 is by performing the operation of (1)��(8), radio frequency link adjustment can be realized fast, when can complete frequency switching within a short period of time, it is possible to fast quick-recovery link is stablized so that can effectively receive the bigger radiofrequency signal of dynamicrange.

Wherein, in order to avoid the wasting of resources, if when baseband processing module 101 detects that the adjustment number of times that variable gain is amplified unit 209 or described numerical control attenuation unit 204 is greater than the first preset times, then can terminate variable gain being amplified the adjustment of unit or described numerical control attenuation unit, directly can also carry out data processing by radio frequency signal simultaneously.

Wherein, baseband processing module 101 controls local oscillator processing unit 210 provides local oscillation signal to Frequency mixing processing unit 206, carries out local oscillator configuration to trigger Frequency mixing processing unit 206 radio frequency signal; If when local oscillator configures unsuccessfully, baseband processing module 101 can control 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, in order to reduce data waste, if when detecting that multiplicity is greater than the 2nd preset times, then can directly terminate local oscillator configuration.

Wherein, when each frequency control local oscillator processing unit 210 that baseband processing module 101 configures according to user provides local oscillation signal, all need variable gain unit and numerical control attenuation unit are carried out corresponding initial configuration, initial configuration parameter comprises the yield value of variable gain unit and the attenuation state etc. of numerical control attenuation unit, this initial configuration parameter can be arranged 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 arrange configuration parameter and monitoring or search frequency sweep result etc., as shown in Figure 1, described frequency-sweeping apparatus can also comprise local terminal and safeguard (LMT, LocalMaintenanceTerminal) backstage 105, this LMT backstage 105 has configure user parameter and display function etc., it can ask configure user parameter according to user, it is possible to the data processed result etc. of display radiofrequency signal. Customer parameter comprises the initial configuration parameter etc. of Frequency Band Selection, local oscillator configuration parameter, frequency configuration parameter and each chip.

Certainly, as other possible implementation, in rf signal reception module in the frequency-sweeping apparatus that the embodiment of the present application provides, first low noise amplification unit can also be arranged between the first filter unit and numerical control attenuation unit, thus the first filtering list is the filtering pre-selection process that the radiofrequency signal received by antenna unit carries out in-band signalling, first low noise amplification unit is that the radiofrequency signal after the first filtering unit filters pre-selection process is carried out amplification process, numerical control attenuation unit is that the radiofrequency signal to the first low noise amplification unit amplification process carries out gain compensation.

Certainly, rf signal reception module can also adopt other forms to realize, in order to support can to the frequency sweep of the radiofrequency signal under the different frequency range of different communication standard, as shown in Figure 2, for the structural representation of a kind of another embodiment of frequency-sweeping apparatus that the embodiment of the present application provides, the rf signal reception module 102 in described frequency-sweeping apparatus can comprise:

Antenna unit 201, first low noise amplification unit 202, first multi-channel rf switch 211, first filter unit 203, numerical control attenuation unit 204, the 2nd low noise amplification unit 205, Frequency mixing processing unit 206, intermediate frequency amplification unit 207, intermediate frequency filtering unit 208 and the variable gain that connect successively amplify unit 209, and the local oscillator processing unit 210 being connected with described Frequency mixing processing unit 206.

In the present embodiment, described first filter unit 203 comprises the multiple wave filters filtering the radiofrequency signal of different frequency range at least two kinds of communication standards.

First multi-channel rf switch 211 for selecting the strainer of the radiofrequency signal for the frequency range filtering a kind of communication standard from described first filter unit 203.

The strainer that first filtering unit 203 is selected is for carrying out in-band signalling filtering pre-selection process to the radiofrequency signal after the first low noise amplification unit 202 amplification process.

Frequency-sweeping apparatus shown in Fig. 2 and the difference of frequency-sweeping apparatus shown in Fig. 1 are:

It is provided with the first multi-channel rf switch 211 between described first low noise amplification unit 201 and described first filter unit 202; First filtering unit 202 specifically comprises the multiple wave filters filtering the radiofrequency signal of different frequency range at least two kinds of communication standards, so that 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 units and connection relation can refer to the corresponding embodiment of Fig. 1.

The concrete function of baseband processing module 101 can refer to described in embodiment corresponding to Fig. 1, and its control local oscillator configuration process and radio frequency link adjustment process embodiment corresponding to Fig. 1 are identical, do not repeat them here.

Wherein, first multi-channel rf switch 211 can be connected with baseband processing module 101, baseband processing module 101 can generate steering order according to customer parameter, controls the strainer that the radiofrequency signal for the frequency range filtering a kind of communication standard selected by the first multi-channel rf switch 211 from the first filtering unit 202.

As an embodiment again, in Fig. 2, the first low noise amplification unit can also be arranged between the first filter unit and numerical control attenuation unit, and the first filter unit is connected with antenna unit. First filtering list is the filtering pre-selection process that the radiofrequency signal received by antenna unit carries out in-band signalling, first low noise amplification unit is that the radiofrequency signal after the first filtering unit filters pre-selection process is carried out amplification process, and numerical control attenuation unit is that the radiofrequency signal to the first low noise amplification unit amplification process carries out gain compensation.

As an embodiment again, shown in Figure 3, the rf signal reception module 102 of this frequency-sweeping apparatus can comprise:

The antenna unit 201 connected successively, clipping unit 212, first low noise amplification unit 202, first multi-channel rf switch 211, first filter unit 203, numerical control attenuation unit 204, 2nd low noise amplification unit 205, 2nd multi-channel rf switch 213, 2nd filter unit 214, Frequency mixing processing unit 206, intermediate frequency amplifies unit 207, intermediate frequency filtering unit 208, 3rd low noise amplification unit 215 and variable gain amplify unit 209, and the low-pass filter unit 215 being connected with described Frequency mixing processing unit 206, the wide-band amplify unit 217 being connected with low-pass filter unit 216, the local oscillator processing unit 210 being connected with wide-band amplify unit 217.

In frequency-sweeping apparatus described in Fig. 3, rf signal reception module 102 is with rf signal reception module 102 difference of frequency-sweeping apparatus shown in Fig. 2:

It was provided with clipping unit 212 before the first low noise amplification unit 202, this clipping unit 212 is for carrying out amplitude limiting processing to the radiofrequency signal that antenna unit 201 receives, and therefore the radiofrequency signal after carrying out amplitude limiting processing is specifically carried out amplification process by the first low noise amplification unit 202.

It is provided with the 2nd multi-channel rf switch 213 and the 2nd filter unit 214 between 2nd low noise amplification unit 205 and Frequency mixing processing unit 206.

Low-pass filter unit 216 and wide-band amplify unit 217 are set between Frequency mixing processing unit 206 and local oscillator processing unit 210.

Between intermediate frequency filtering unit 208 and variable gain amplification unit 209, the 3rd low noise amplification unit 215 is set, for the radiofrequency signal that intermediate frequency filter unit 201 processes is carried out amplification process, therefore variable gain is amplified unit and specifically the radiofrequency signal after the 3rd low noise amplification cell processing is carried out gain amplification disposal.

2nd filter unit 214 comprises and one to one wave filter identical with described first filter unit 203, and described 2nd multi-channel rf switch 213 for selecting the wave filter corresponding with the wave filter selected in described first filter unit 203 from described 2nd filter unit 214.

The wave filter selected in 2nd filter unit 214 processes for the radiofrequency signal of the 2nd low noise amplification cell processing carries out the suppression of Image interference.

Wherein, 2nd multi-channel rf switch 213 can be connected with baseband processing module 101, baseband processing module 101 can generate steering order according to customer parameter, and the wave filter corresponding with the wave filter selected in described first filter unit 203 selected by control the 2nd multi-channel rf switch 213 from described 2nd filter unit 214.

Wide-band amplify unit 216 is for carrying out amplification process to the local oscillation signal that described local oscillator processing unit provides;

Low-pass filter unit 215 is for carrying out harmonics restraint process to the local oscillation signal that broad band amplifier amplification processes.

Thus Frequency mixing processing unit 206 is specifically for carrying out down conversion process according to the local oscillation signal after low-pass filter unit 215 process to the radiofrequency signal after the 2nd filter unit process, obtains intermediate frequency signal.

Certainly, as an embodiment again, 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 the need to processing through amplification process and harmonics restraint.

As an embodiment again, frequency-sweeping apparatus shown in Fig. 3 can not also comprise clipping unit.

As an embodiment again, frequency-sweeping apparatus shown in Fig. 4 can not also comprise the 3rd low noise amplification unit.

As an embodiment again, in frequency-sweeping apparatus shown in Fig. 4, the first low noise amplification unit can also be arranged between the first filter unit and numerical control attenuation unit, and the first filter unit is connected with clipping 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 the embodiment of the present application provides, the frequency-sweeping apparatus that the embodiment of the present application provides can also adopt other forms certainly, ensure that rf signal reception module comprises numerical control attenuation unit and variable gain and amplifies unit, with can by baseband processing module control realization automatic growth control.

The frequency-sweeping apparatus provided by the embodiment of the present application can effectively receive the bigger radiofrequency signal of dynamicrange, and frequency is short for switching time, it is possible to realizes the stable modulation of radio frequency link fast.

In the embodiment of the present application, Frequency mixing processing unit can adopt frequency mixer, local oscillator processing unit can adopt Frequency Synthesizer, first low noise amplification unit, the 2nd low noise amplification unit are corresponding amplifier, numerical control attenuation unit can adopt numerical-control attenuator (DATT, DigitalAttenuator), variable gain amplification unit can adopt variable gain amplifier (VGA, variablegainamplifier).

Analog/digital conversion module adopts A/D converter (ADC, AnalogtoDigitalConverter); D/A switch module adopts D/A converter (DAC, Digitaltoanalogconverter).

Clipping unit can adopt limiter, and low-pass filter unit can adopt low-pass filter, wide-band amplify unit can adopt broad band amplifier etc.

The structural representation of a kind of signal processing method embodiment 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, rf signal reception module, the D/A switch module being connected respectively and analog/digital conversion module with described baseband processing module; Described rf signal reception module at least comprises the antenna unit, the first low noise amplification unit, the first filter unit, numerical control attenuation unit, the 2nd low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplification unit, intermediate frequency filtering unit and the variable gain that connect successively and amplifies unit, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation unit, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplify unit respectively with described D/A switch module and described analog/digital conversion model calling. Described frequency-sweeping apparatus can be specially the frequency-sweeping apparatus described in Fig. 1��Fig. 4 any embodiment.

Described method can comprise following step:

401: baseband processing module controls the frequency collection radiofrequency signal that described radio frequency reception module configures user.

402: controlling described local oscillator processing unit provides local oscillation signal to Frequency mixing processing unit;

403: when detecting described radiofrequency signal local oscillator configuration successful, it is determined that radio frequency link target chain gain value.

404: adjust described variable gain and amplify unit and described numerical control attenuation unit so that current link gain value and target chain gain value are in default limit of error.

405: when current link gain value and described target chain gain value are in default limit of error, described radiofrequency signal is carried out data processing.

Wherein, adjustment variable gain amplifies unit and described numerical control attenuation unit, make current link gain value and target chain gain value can have multiple possibility implementation in default limit of error, as a kind of possible implementation, as shown in Figure 5, described adjustment variable gain amplification unit and described numerical control attenuation unit can comprise following step:

501: obtain current link gain value;

502: calculate current link gain value subtract described target chain gain value obtain link adjustment difference;

503: judge that described link adjustment difference is whether in default limit of error, if it does, perform step 405, if not, performs step 504.

504: judge whether described link adjustment difference is greater than 0, if it does, perform step 505, if not, perform step 511.

505: calculate the maxgain value that described variable gain amplifies unit and subtract current gain value and obtain the first adjustment allowance.

506: judge whether described first adjustment allowance is greater than described link adjustment difference, if it does, perform step 507, if not, perform step 508.

507: the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, returns step 501 and continues to perform.

508: the attenuation state detecting described numerical control attenuation unit.

509: when described numerical control attenuation unit is not decayed, the current gain value adjusting described variable gain amplification unit is described maxgain value, and returns step 501.

510: when described numerical control attenuation unit is decayed, control described numerical control attenuation unit and do not decay, the current gain value adjusting described variable gain amplification unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation unit, and returns step 502.

511: calculate described variable gain amplify unit minimum gain value subtract current gain value obtain the 2nd adjustment allowance.

512: judge whether described 2nd adjustment allowance is greater than described link adjustment difference, if not, perform step 513, if it does, perform step 514.

513: the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and returns step 501.

514: the attenuation state detecting described numerical control attenuation unit.

515: when described numerical control attenuation unit is not decayed, the current gain value adjusting described variable gain amplification unit is described minimum gain value, and returns step 501.

516:: when described numerical control attenuation unit is decayed, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, reduces the gain compensation value of described numerical control attenuation unit simultaneously, returns step 501.

In order to avoid the wasting of resources, baseband processing module detects the adjustment number of times that described variable gain amplifies unit or described numerical control attenuation unit when being greater than the first preset times, then can terminate described variable gain being amplified the adjustment of unit or described numerical control attenuation unit.

Wherein, baseband processing module is when detecting described radiofrequency signal local oscillator and configure unsuccessfully, and described method can also comprise:

Control described local oscillator processing unit to repeat to provide local oscillation signal to described Frequency mixing processing unit, until detecting that described radiofrequency signal local oscillator configuration successful or multiplicity are greater than the 2nd preset times by described Frequency mixing processing unit.

In the embodiment of the present application, baseband processing module by amplifying the adjustment of unit and numerical control attenuation unit to variable gain, the automatic growth control of radio frequency link can be realized, according to the radiofrequency signal that current configuration frequency receives, can adjust by radio frequency link fast, such that it is able to complete within a short period of time frequency switching and link stablize so that can effectively receive the bigger radiofrequency signal of dynamicrange, and ensure that the fast processing of radiofrequency signal, it is achieved the object of rapid frequency-sweeping.

For aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the application is not by the restriction of described sequence of operation, 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 sheets all belongs to preferred embodiment, and involved action and module might not be that the application is necessary.

In this specification sheets, each embodiment adopts the mode gone forward one by one to describe, and what each embodiment emphasis illustrated is the difference with other embodiments, between each embodiment identical similar portion mutually see. For device disclosed in embodiment, owing to it corresponds to the method disclosed in Example, so what describe is fairly simple, relevant part illustrates see method part.

Finally, also it should be noted that, herein, the such as relational terms of first and second grades and so on is only used for separating an entity or operation with another entity or operational zone, and not necessarily requires or imply to there is any this kind of actual relation or sequentially between these entities or operation. And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, so that comprise the process of a series of key element, method, article or equipment not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise the key element intrinsic for this kind of process, method, article or equipment. When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.

To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are enable to realize or use the application. To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments. Therefore, the application can not be limited in these embodiments shown in this article, but be met the widest scope consistent with principle disclosed herein and features of novelty.

Claims (8)

1. a frequency-sweeping apparatus, it is characterised in that, comprise baseband processing module, rf signal reception module, the D/A switch module being connected respectively and analog/digital conversion module with described baseband processing module;

Described rf signal reception module comprises the antenna unit, the first low noise amplification unit, the first filter unit, numerical control attenuation unit, the 2nd low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplification unit, intermediate frequency filtering unit and the variable gain that connect successively and amplifies unit, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation unit, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplify unit respectively with described D/A switch module and described analog/digital conversion model calling;

The radiofrequency signal that described baseband processing module receives at the frequency that user configures according to described rf signal reception module, controlling described local oscillator processing unit provides local oscillation signal to described Frequency mixing processing unit; When described Frequency mixing processing unit being detected to described radiofrequency signal local oscillator configuration successful, it is determined that the target chain gain value of radio frequency link; Adjust described variable gain and amplify unit and described numerical control attenuation unit so that the current link gain value of radio frequency link and described target chain gain value are in default limit of error; When current link gain value and described target chain gain value are in default limit of error, described radiofrequency signal is carried out data processing;

Wherein, described baseband processing module adjusts described variable gain amplification unit and described numerical control attenuation unit so that current link gain value and target chain gain value comprise in default limit of error:

Obtain current link gain value;

Calculate current link gain value subtract described target chain gain value obtain link adjustment difference;

Exceed default limit of error when described link adjusts difference, and described link adjustment difference is when being greater than 0, calculate the maxgain value that described variable gain amplifies unit and subtract its current gain value and obtain the first adjustment allowance;

If described first adjustment allowance is greater than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described first adjustment allowance is less than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described maxgain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation unit, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

Exceed described default limit of error when described link adjusts difference, and described link adjustment difference is when being less than 0, calculate the minimum gain value that described variable gain amplifies unit and subtract its current gain value and obtain the 2nd adjustment allowance;

If described 2nd adjustment allowance is less than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described 2nd adjustment allowance is greater than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described minimum gain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, reduce the gain compensation value of described numerical control attenuation unit simultaneously, return the step obtaining current link gain value to continue to perform, until current link gain value and described target chain gain value are in default limit of error.

2. device according to claim 1, it is characterized in that, described baseband processing module is when described link adjustment difference exceeds default limit of error, detect the adjustment number of times that described variable gain amplifies unit or described numerical control attenuation unit when being greater than the first preset times, terminate described variable gain being amplified the adjustment of unit or described numerical control attenuation unit.

3. device according to claim 1 and 2, it is characterized in that, described baseband processing module is when detecting described radiofrequency signal local oscillator and configure unsuccessfully, control described local oscillator processing unit to repeat to provide local oscillation signal to described Frequency mixing processing unit, until detecting that described radiofrequency signal local oscillator configuration successful or multiplicity are greater than the 2nd preset times by described Frequency mixing processing unit.

4. device according to claim 1 and 2, it is characterised in that, described first filter unit comprises multiple wave filter of the radiofrequency signal for filtering different frequency range at least two kinds of communication standards;

Described rf signal reception module also comprises:

The the first multi-channel rf switch being arranged between described first low noise amplification unit and described first filter unit, for selecting the strainer of the radiofrequency signal for the frequency range filtering a kind of communication standard from described first filter unit;

The clipping unit being arranged between described antenna unit and described first low noise amplification unit;

The low-pass filter unit being arranged between described Frequency mixing processing unit and described local oscillator processing unit and wide-band amplify unit;

The 3rd low noise amplification unit being arranged between described intermediate frequency filtering unit and described variable gain amplification unit;

The 2nd multi-channel rf switch being arranged between described 2nd low noise amplification unit and described Frequency mixing processing unit and the 2nd filter unit, described 2nd filter unit comprises and one to one wave filter identical with described first filter unit, and described 2nd multi-channel rf switch is used for from described 2nd filter unit to select the wave filter corresponding with the wave filter selected in described first filter unit.

5. device according to claim 1, it is characterised in that, described frequency-sweeping apparatus also comprises the local terminal being connected with described baseband processing module and safeguards backstage, for asking configure user parameter according to user; Show described radiofrequency signal data processed result.

6. a signal processing method, it is characterised in that, it is applied in frequency-sweeping apparatus, described frequency-sweeping apparatus comprises baseband processing module, rf signal reception module, the D/A switch module being connected respectively and analog/digital conversion module with described baseband processing module; Described rf signal reception module at least comprises the antenna unit, the first low noise amplification unit, the first filter unit, numerical control attenuation unit, the 2nd low noise amplification unit, Frequency mixing processing unit, intermediate frequency amplification unit, intermediate frequency filtering unit and the variable gain that connect successively and amplifies unit, and the local oscillator processing unit being connected with described Frequency mixing processing unit; Described numerical control attenuation unit, described local oscillator processing unit are connected with described baseband processing module respectively; Described variable gain amplify unit respectively with described D/A switch module and described analog/digital conversion model calling;

Described method comprises:

Described baseband processing module controls the frequency collection radiofrequency signal that described radio frequency reception module configures user;

Control described local oscillator processing unit and provide local oscillation signal to described Frequency mixing processing unit;

When detecting described radiofrequency signal local oscillator configuration successful, it is determined that radio frequency link target chain gain value;

Adjust described variable gain and amplify unit and described numerical control attenuation unit so that current link gain value and described target chain gain value are in default limit of error;

When current link gain value and described target chain gain value are in default limit of error, described radiofrequency signal is carried out data processing;

Wherein, described adjustment described variable gain amplification unit and described numerical control attenuation unit comprise:

Obtain current link gain value;

Calculate current link gain value subtract described target chain gain value obtain link adjustment difference;

Exceed default limit of error when described link adjusts difference, and described link adjustment difference is when being greater than 0, calculate the maxgain value that described variable gain amplifies unit and subtract current gain value and obtain the first adjustment allowance;

If described first adjustment allowance is greater than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described first adjustment allowance is less than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described maxgain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases the gain compensation value of described link adjustment difference and described numerical control attenuation unit, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

Exceed described default limit of error when described link adjusts difference, and described link adjustment difference is when being less than 0, calculate the minimum gain value that described variable gain amplifies unit and subtract current gain value and obtain the 2nd adjustment allowance;

If described 2nd adjustment allowance is less than described link adjustment difference, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, and return the step obtaining current link gain value and continue to perform, until current link gain value and described target chain gain value are in default limit of error;

If described first adjustment allowance is greater than described link adjustment difference, detect described numerical control attenuation unit when not decaying, the current gain value adjusting described variable gain amplification unit is described minimum gain value, and return the step obtaining current link gain value and continue to perform, until current link gain value and target chain gain value are in default limit of error; When detecting the decay of described numerical control attenuation unit, control described numerical control attenuation unit not decay, the current gain value adjusting described variable gain amplification unit increases described link adjustment difference, reduce the gain compensation value of described numerical control attenuation unit simultaneously, return the step obtaining current link gain value to continue to perform, until current link gain value and described target chain gain value are in default limit of error.

7. method according to claim 6, it is characterised in that, when described link adjustment difference exceeds described default limit of error, described method also comprises:

Detect the adjustment number of times that described variable gain amplifies unit or described numerical control attenuation unit when being greater than the first preset times, terminate described variable gain being amplified the adjustment of unit or described numerical control attenuation unit.

8. method according to claim 6 or 7, it is characterised in that, when detecting described radiofrequency signal local oscillator and configure unsuccessfully, described method also comprises:

Control described local oscillator processing unit to repeat to provide local oscillation signal to described Frequency mixing processing unit, until detecting that described radiofrequency signal local oscillator configuration successful or multiplicity are greater than the 2nd preset times by described Frequency mixing processing unit.