CN102932814A - Signal detection method, device and system for mobile terminal - Google Patents

Abstract

The invention discloses a signal detection method for a mobile terminal. The signal detection method comprises the following steps of: acquiring cell configuration information of a wireless communication system in a monitoring range by monitoring a downlink signal of the wireless communication system in the monitoring range; monitoring an uplink signal of a target monitoring cell in the monitoring range and calculating uplink characteristic information for reflecting whether the uplink signal of the target monitoring cell exists according to the cell configuration information; and comparing the uplink characteristic information with a preset threshold and judging whether the uplink signal of the mobile terminal is detected according to the comparison result. The invention further discloses a signal detection device and system of the mobile terminal. The signal detection method, device and system disclosed by the invention have the capability of improving the accuracy of detecting the uplink signal of the mobile terminal in the target monitoring cell.

Description

Mobile terminal signal detection method, Apparatus and system

Technical field

The present invention relates to communication technical field, particularly a kind of mobile terminal signal detection method, Apparatus and system.

Background technology

Modern society, the portable terminals such as mobile phone become indispensable important tool in people's work and the life day by day.It is self-evident that the extensive use of mobile phone brings the facility in the communication, but has also produced many hidden danger that can not be ignored simultaneously.For example at the prison, detention house, examination scene, gas station, gas station, chemical industry warehouse, power scheduling chamber, hospital outpatient, ward, operating room, and in a lot of sensitive sites of intelligence department, the military and important government department, Civil Aviation ATM Sector etc. of country, the hidden danger that the signal of portable terminal all may become safety and maintain secrecy need to strictly be monitored.

In order to obtain the uplink signal transmissions situation of portable terminal in the monitoring range, as shown in Figure 1, normal operation mobile terminal signal detector is realized, traditional mobile terminal signal detector is by detecting the broadband signal power in the monitoring range, judge whether to exist mobile terminal signal, if there is broadband signal power unusual in the monitoring range, the upward signal that then can judge portable terminal exists.Yet traditional movable signal detector can't obtain the possible operating frequency range of portable terminal in the monitoring range, bandwidth and timing, can only be in a larger frequency range continuous detecting, detection efficiency is lower, poor accuracy, easily produce and make a false report the situation of reporting by mistake and failing to report.

Summary of the invention

The invention provides a kind of mobile terminal signal detection method, Apparatus and system, can improve the accuracy that the portable terminal upward signal detects.

For reaching above-mentioned purpose, technical scheme of the present invention specifically is achieved in that

A kind of mobile terminal signal detection method, the method comprises:

Obtain the community configured information of the wireless communication system in the monitoring range by the downstream signal of intercepting the wireless communication system in the monitoring range;

Intercept the upward signal of the target monitoring residential quarter in the monitoring range, and calculate the up characteristic information that whether exists for reflection target monitoring cell uplink signal according to described community configured information;

Described up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result.

Preferably, described calculating according to described community configured information is used for the up characteristic information whether reflection target monitoring cell uplink signal exists, up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result, comprising:

According to cell timing information, frequency information, the signal bandwidth in the described community configured information, the upward signal of target monitoring residential quarter is sampled, by the signal of sampling and the uplink receiving power of the conjugation accumulation calculating target monitoring residential quarter of this sampled signal;

Described uplink receiving power and the thresholding of presetting are compared, if greater than default thresholding, then judge the upward signal that detects portable terminal.

Preferably, the uplink receiving power of described calculating target monitoring residential quarter; Comprise:

For Frequency Division Duplexing (FDD) (FDD) system, calculate uplink receiving power in up operating frequency by time slot;

For time division duplex (TDD) system, calculate uplink receiving power at ascending time slot by time slot.

Preferably, described calculating according to described community configured information is used for the up characteristic information whether reflection target monitoring cell uplink signal exists, up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result, comprising:

Carry out channel estimating according to the ascending pilot channel in the described community configured information or pilot information, calculate the upward signal power of target monitoring residential quarter and the ratio of interference power;

Described ratio and the window signal-noise ratio threshold of presetting are compared, if greater than described window signal-noise ratio threshold, then judge the upward signal that detects portable terminal.

Preferably, the described up characteristic information that is used for reflection target monitoring cell uplink RST that calculates according to described community configured information, up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result, comprising:

According to Random Access Channel and the random access code group information of the residential quarter in the described district configuration information, the random access sequence that carries out the target monitoring residential quarter detects, and calculates the poor of the power of relevant peaks and the mean value in the average window before and after the relevant peaks;

The power of described relevant peaks and the difference of the mean value in the average window before and after the relevant peaks are compared with the contrast thresholding of presetting, if greater than described contrast thresholding, then judge the upward signal that detects portable terminal.

A kind of mobile terminal signal checkout gear, this device comprises:

Signal receiving module is used for timesharing and receives the downstream signal of wireless communication system in the monitoring range and the upward signal of target monitoring residential quarter;

Signal processing module for the downstream signal of intercepting the wireless communication system in the monitoring range by described signal receiving module, obtains the community configured information of the wireless communication system in the monitoring range; Intercept the upward signal of the target monitoring residential quarter in the monitoring range by described signal receiving module, calculate the up characteristic information that whether exists for reflection target monitoring cell uplink signal;

Preferably, described signal processing module comprises:

Power calculation unit, according to cell timing information, frequency information, the signal bandwidth in the described community configured information, upward signal to the target monitoring residential quarter is sampled, by the signal of sampling and the uplink receiving power of the conjugation accumulation calculating target monitoring residential quarter of this sampled signal;

Identifying unit compares described uplink receiving power and the thresholding of presetting, if greater than default thresholding, then judges the upward signal that detects portable terminal.

Preferably, described signal processing module comprises:

The ratio calculation unit carries out channel estimating according to the ascending pilot channel in the described community configured information or pilot information, calculates the upward signal power of target monitoring residential quarter and the ratio of interference power;

Identifying unit compares described ratio and the window signal-noise ratio threshold of presetting, if greater than described window signal-noise ratio threshold, then judges the upward signal that detects portable terminal.

Preferably, described signal processing module comprises:

Difference computational unit, Random Access Channel and random access code group information according to the residential quarter in the described district configuration information, the random access sequence that carries out the target monitoring residential quarter detects, calculate average power poor of the power of relevant peaks window and relevant peaks front window, and the average power of the power of relevant peaks and relevant peaks rear window is poor;

Identifying unit, poor with the average power of the power of described relevant peaks window and relevant peaks front window, and the difference of the average power of the power of relevant peaks and relevant peaks rear window compares with default contrast thresholding, if all greater than described contrast thresholding, then judges the upward signal that detects portable terminal.

A kind of mobile terminal signal detection system, this system comprises: mobile terminal signal checkout gear and control terminal;

Described mobile terminal signal checkout gear is used for the community configured information by the wireless communication system in the signal acquisition monitoring range of intercepting the wireless communication system in the monitoring range;

Described community configured information is reported described control terminal; Receive described control terminal and generate the signal monitoring parameter of corresponding target monitoring residential quarter according to described community configured information; According to the signal monitoring parameter that receives from described control terminal, calculate the up characteristic information that whether exists for reflection target monitoring cell uplink signal; Described up characteristic information and the thresholding of presetting are compared;

Described control terminal is used for receiving the community configured information that described mobile terminal signal checkout gear reports, and generates the signal monitoring parameter of corresponding target monitoring residential quarter, sends to described mobile terminal signal checkout gear.

As seen from the above technical solution, this mobile terminal signal detection method of the present invention, Apparatus and system, by the mobile communication signal that may exist in the monitoring range is intercepted, can search the residential quarter of the wireless communication system that can listen in the monitoring range, and get access to the community configured information of these residential quarters; Pass through community configured information, can carry out the calculating of upward signal situation at the ascending time slot of target monitoring residential quarter, compare by be used for reflection target monitoring cell uplink the signal up characteristic information that whether exists and the thresholding of presetting that will calculate, just can know that whether the ascending time slot in the target monitoring residential quarter has portable terminal carrying out the signal transmission, reaches the purpose that the portable terminal upward signal detects.Because by intercepting the configuration information that has obtained the target monitoring residential quarter, thus can accurately calculate targetedly up characteristic information, thus improved efficient and accuracy that mobile terminal signal detects.

Description of drawings

Fig. 1 is existing mobile terminal signal detector application scenarios schematic diagram.

Fig. 2 is the mobile terminal signal detection method flow chart of the embodiment of the invention one.

Fig. 3 is that the signal of the LTE system of the embodiment of the invention is intercepted flow chart.

Fig. 4 is that the signal of the WCDMA system of the embodiment of the invention is intercepted flow chart.

Fig. 5 is that the signal of the CDMA1X/EVDO system of the embodiment of the invention is intercepted flow chart.

Fig. 6 is that the signal of the TD-SCDMA system of the embodiment of the invention is intercepted flow chart.

Fig. 7 is that the signal of the gsm system of the embodiment of the invention is intercepted flow chart.

Fig. 8 is the mobile terminal signal structure of the detecting device schematic diagram of the embodiment of the invention.

Fig. 9 is the threshold comparison method schematic diagram of the embodiment of the invention.

Figure 10 is the mobile terminal signal detection system structure chart of the embodiment of the invention.

Figure 11 is the signal processing module structural representation of the embodiment of the invention one.

Figure 12 is the signal processing module structural representation of the embodiment of the invention two.

Figure 13 is the signal processing module structural representation of the embodiment of the invention three.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

As shown in Figure 2, the mobile terminal signal detection method of the embodiment of the invention one comprises the steps:

Step 201 is obtained the community configured information of the wireless communication system in the monitoring range by the downstream signal of intercepting the wireless communication system in the monitoring range.

Monitoring range refers to that signal monitoring apparatus can realize the coverage of signal monitoring; In this monitoring range, may there be the signal of various wireless communication system, so may listen to the downstream signal of one or more wireless communication systems in this step.

Intercept the downstream signal of wireless communication system, can adopt and intercept arbitrarily mode, its objective is the community configured information that obtains the residential quarter of this wireless communication system in monitoring range, as long as can be by intercepting the community configured information that obtains in the monitoring range, cell search process that for example can the analog wireless communication system terminal, for different wireless communication systems, because its frequency range, standard, power, the concrete system parameters such as channel is different, the detailed process that realization is intercepted is different, but can realize by the cell search process in the respective wireless communication system, to the wireless communication system that may exist in the monitoring range, may exist the frequency range of residential quarter to carry out Cell searching, and carry out down-going synchronous with all residential quarters that search, obtain the community configured information of all residential quarters that search.

When carrying out Cell searching, can search for by full frequency band; Certainly, in order to improve search efficiency, the radio-frequency channel grid that also can require according to the wireless communication system protocol specification are step-length, in the working frequency range scope at the down channel place of wireless communication system, carry out Cell searching, and with the residential quarter that searches carry out on downgoing time and the frequency synchronously, thereby obtain the described community configured information of the residential quarter that searches.

Search band limits (being used in China) when specifically carrying out Cell searching can be with reference to following table.

Table one, existing different communication systems frequency allocation table.

According to different wireless communication systems, the signal frequency of specifically intercepting can comprise 869-894MHz; 825-960MHz; 1805-1880MHz; 1880-1900MHz; 1900-1990MHz; 2010-2025MHz; 2130-2145MHz; 2110-2125MHz etc.

The process of specifically intercepting for the different wireless communication system will be given an example below.

The community configured information of intercepting all residential quarters that listen to that will obtain in the process in step 201, the signal frequency that comprises the wireless communication system that the residential quarter is corresponding, standard, signal strength signal intensity and concrete cell parameter (such as residential quarter ID etc.), and obtain the descending timing information of all residential quarters that listen to, and other necessary system informations etc.

As long as get access to these community configured informations, just can obtain corresponding mobile terminal signal monitoring parameter and (comprise frequency, code word, frame timing, frame format, power, transmitting-receiving timing controlled etc.), and according to these monitoring parameters the portable terminal in the monitoring range is intercepted.

Certainly, signal monitoring parameter corresponding to community configured information can directly be generated by the default rule in this locality, also can be by the residential quarter relevant information being reported outside control terminal, and obtain from the mode of the control terminal reception signal monitoring parameter of outside.

For example, the community configured information of the wireless communication system that listens to is recorded in this locality, and generates the signal monitoring parameter of corresponding target monitoring residential quarter according to the community configured information of local record; According to signal monitoring parameter monitoring cell uplink signal.

Perhaps, the community configured information with the wireless communication system that listens to reports outside control terminal; The control terminal of reception outside generates according to community configured information, the signal monitoring parameter of corresponding target monitoring residential quarter; The signal monitoring parameter monitoring cell uplink signal that receives according to the control terminal from the outside.

Step 202 is intercepted the upward signal of the target monitoring residential quarter in the monitoring range, and calculates according to described community configured information and to be used for the up characteristic information whether reflection target monitoring cell uplink signal exists.

Wherein, described up characteristic information for reflecting whether target monitoring cell uplink signal exists can be the uplink receiving power of residential quarter; Or the upward signal power of residential quarter and the ratio of average interference power, perhaps comprise simultaneously both, or be other feature that can reflect the cell uplink RST etc.

Finish the residential quarter that might exist in the monitoring range intercept with search procedure after, the residential quarter of all mobile communication system that can receive will be identified, and finish down-going synchronous to them, and receive the downlink broadcast information of these residential quarters, obtain the community configured information of each residential quarter, in this configuration information, the timing information of each residential quarter, frequency information and signal bandwidth, can intercept sampling to the upward signal of target monitoring residential quarter, and calculate up characteristic information.

Wherein, the calculating of upward signal characteristic value, can adopt time slot power judgement method to carry out ascending power and calculate, namely the upward signal of target monitoring residential quarter be sampled, the uplink receiving power of the signal by sampling and the conjugation accumulation calculating target monitoring residential quarter of this sampled signal; Specific formula for calculation can for:

$P=\underset{L}{\mathrm{\Σ}}{[I\left(i\right)+\mathrm{jQ}\left(i\right)]\×[I\left(i\right)+\mathrm{jQ}\left(i\right)]}^{*}$

Wherein, P is the power of cell uplink time slot, and L represents the sampling number of signal in the ascending time slot, and I (i)+jQ (i) represents i signal sampling.

Namely for a complex signal, signal times is with the cumulative power that obtains it of the conjugation of signal.

In addition, uplink receiving power can also adopt the normalized power computing formula:

$P=\frac{1}{L}\underset{L}{\mathrm{\Σ}}{[I\left(i\right)+\mathrm{jQ}\left(i\right)]\×[I\left(i\right)+\mathrm{jQ}\left(i\right)]}^{*}$

Wherein, P is the power of cell uplink time slot, and L is this time slot signal sampling number, and I (i)+jQ (i) represents i signal sampling.

Attention: the power for each cell uplink time slot that detects of above measurement, wherein the timing information of ascending time slot, frequency information, signal bandwidth come from the above-mentioned community configured information that process obtains of intercepting.

Wherein, the FDD systems such as GSM/CDMA2000/WCDMA/LTE FDD are carried out pursuing on the up operating frequency calculating received power of time slot, the TDD systems such as TD-SCDMA/LTE TDD are carried out the calculating received power by time slot of ascending time slot.

Afterwards, the power P of this calculating gained is compared with a thresholding, if greater than thresholding, just judged that having detected portable terminal is carrying out the upward signal transmission, otherwise just think that not having portable terminal to carry out upward signal sends.Wherein thresholding can be that absolute thresholding also can be relative threshold.

Except whether detecting greater than thresholding by received power, can also try to achieve to detect whether the portable terminal upward signal is arranged by the method that the ascending pilot channel/pilot information of the residential quarter that detects is carried out channel estimating.Channel impulse response is to try to achieve according to the pilot signal that receives the user, adopts channel estimation methods ripe in the present mobile communication, and the channel impulse response of supposing the user is impulse_resp (1:L)=h _n" (1:L), we think wherein effectively signal directly for K (namely | h _i" | ²Maximum front K bar footpath), remaining is to disturb and noise, cumulative the part in all non-signal footpaths, as noise power, thereby tries to achieve interference power

${\mathrm{\σ}}^2\left(n\right)=\frac{L}{\begin{array}{c}(\mathrm{Number}\_\mathrm{of}\_\mathrm{all}\\ \mathrm{taps}\_\mathrm{not}\_\mathrm{signal})\end{array}}\underset{\mathrm{not}\_\mathrm{signal}}{\underset{\mathrm{all}\_\mathrm{taps}}{\mathrm{\Σ}}}{\left|h_n^{\′\′}\left(i\right)\right|}^2$

Thereby obtain normalization average interference power on the every antenna:

$\stackrel{\‾}{\mathrm{\σ}}\left(n\right)=\mathrm{p\σ}\left(n\right)+(1-p)\stackrel{\‾}{\mathrm{\σ}}(n-1)$

Wherein, p is forgetting factor, and it can obtain by M average period,

Average period, M can preset.

In the recursive resolve process, getting the interference power that calculates for the first time is initial value.

Simultaneously, signal power

Obtain following mobile terminal signal detection algorithm formula: $r_{\mathrm{userSNR}}^{\left(k_m\right)}=\frac{p\left(n\right)}{\stackrel{\‾}{{\mathrm{\σ}}^2}\left(n\right)}>\mathrm{\β}$

Wherein, P (n) is time slot upward signal power, σ ²(n) be interference power, β is the window signal-noise ratio threshold, when the ratio of the upward signal power of time slot and interference power greater than the window signal-noise ratio threshold, can judge that then the upward signal that detects portable terminal exists, otherwise can judge the upward signal that does not have portable terminal.

In addition, can also by Random Access Channel and the random access code group information of the residential quarter that detects, by random access sequence detection method commonly used in the mobile communication, such as the matched filtering algorithm, catch the upward signal of portable terminal.

For example in TD-SCDMA, realize being correlated with matched filter:

Rx_sync1[ante] [256] be 256 complex points of the ante antenna in GP+UpPTS interval regularly, base station.Sync1_code[j] [1:128] be the preorder (preamble) of j signature sequence.

sync1_code_256[j][1:128]=sync1_code[j][1:128]

sync1_code_256[j][129:256]=0

FFT_code[j][1:256]=FFT(sync1_code_256)

Rx_cor_cyc[ante][j][1:256]=IFFT(FFT_code*[j][1:256]*FFT(Rx_sync1[ant?e][1:256]))

Rx_power_cyc[ante][j][k]=Rx_cor_cyc_r ²[ante][j][k]+Rx_cor_cyc_i ²[ante][j][k]

In addition, when considering the energy stack of different antennae, can be according to the state of current bay, the number of the bay of addition is wanted in decision, and the computing formula that finally obtains relevant peaks power is:

$\mathrm{Rx}\_\mathrm{pow}\left[j\right]\left[k\right]=\underset{\mathrm{ante}=1}{\overset{\mathrm{ante}\_\mathrm{num}}{\mathrm{\Σ}}}\mathrm{Rx}\_\mathrm{power}\left[\mathrm{ante}\right]\left[j\right]\left[k\right]$

Wherein, Rx_pow[j] [k] be time slot upward signal power, _{Ante_num}The antenna sum that expression receives, j represents the signature sequence sequence number, k represents the out of phase point.

Step 203 compares described up characteristic information and the thresholding of presetting, and judges whether to detect the upward signal of portable terminal according to comparative result.

For power judgement method, the power P of this calculating gained can be compared with a thresholding, if greater than thresholding, just judge to have detected mobile phone in up transmission, otherwise just think do not have mobile phone to send.Wherein thresholding can be that absolute thresholding also can be relative threshold.

Illegally occupy method for signal to noise ratio, then can be with upward signal power and the ratio of interference power, the i.e. signal to noise ratio that calculates, compare with a default signal-noise ratio threshold, if greater than thresholding, so just judge to have detected mobile phone in up transmission, otherwise just think do not have mobile phone to send.Wherein thresholding can be that absolute thresholding also can be relative threshold.

For the random access sequence detection method, then can check correlator output, see whether satisfy following testing conditions:

As shown in Figure 9, the average power (P_aver_befo) of the power of relevant peaks window (P_peak) and relevant peaks front window poor, and whether the difference of the power of relevant peaks (P_peak) and the average power (P_aver_afte) of relevant peaks rear window is all greater than peak value threshold Pd.

Namely satisfy condition: (P_peak-P_aver_befo) Pd and (P_peak-P_aver_afte) Pd.

Wherein, the scope of relevant peaks front window from the peak point (Po_peak) of relevant peaks front-32-[△ T/3] to-[△ T/3], the scope of relevant peaks rear window be behind the Po_peak [2 △ T/3] to 32+[2 △ T/3].The scope of relevant peaks window is the 2 △ T/3s of front △ T/3 behind the Po_peak of Po_peak.Wherein △ T is the channel window width, and Pd, and △ T is pre-configured variable element.

If the time slot upward signal power Rx_pow[j of target monitoring residential quarter] satisfy above condition, the then SYNC1[j in the code character] be detected, thereby obtain to detect SYNC1[j] SRN(signature reference number), namely detected portable terminal and sent upstream data.

Computational methods for further feature information are similar with manner of comparison, just no longer give an example here.

In addition, for in the step 202, calculate the embodiment of a plurality of characteristic informations, such as calculating simultaneously uplink receiving power, also calculate up signal to noise ratio, relatively the time, can comprehensively compare, namely consider the result that all compare separately, carry out synthetic determination according to default rule, concrete decision procedure can be determined as required.

In addition, synchronous for guaranteeing with the signal of wireless communication system, realize the time of wireless communication system and the synchronous tracking of frequency, to adapt to the situation of wireless communication system network configuration variation in the monitor procedure, can be according to the Preset Time interval, re-start Cell searching according to the community configured information of described local record in the upper frequency that has once searched the residential quarter; Perhaps again take wireless communication system radio-frequency channel grid as step-length, in the working frequency range scope at the down channel place of wireless communication system, carry out Cell searching; Perhaps re-start the full range search; Again carry out down-going synchronous with the residential quarter that searches, obtain the community configured information of the residential quarter that searches.

The below is exemplified below with different wireless communication systems for the process of intercepting in the step 201:

The signal of embodiment one, Long Term Evolution (LTE) system is intercepted flow process, as shown in Figure 3, comprising:

Step 301, carrier frequency detects; Obtain carrier frequency.

Step 302, symbol timing detection.

Step 303, ID identification in residential quarter in the group.

Step 304, radio frames regularly detects; Obtain frame timing information.

Step 305, residential quarter ID organizes identification; Obtain residential quarter ID group information.

Step 306, physics are broadcast the many antenna sets identifications of channel (PBCH); Obtain aerial information.

Step 307, Cyclic Prefix (CP) the length identification of PBCH place subframe; Obtain the CP length information.

Step 308, temporal frequency is synchronous; Carry out the synchronous of time and frequency with wireless communication system.

Step 309, system information reads, and comprises the information such as system bandwidth, physical mixed ARQ indicating channel (PHICH) resource, antenna number.

The information that wherein will obtain in step 301 ~ 303 can be obtained by using primary synchronization channel (P-SCH), the information that will obtain in step 304 ~ 307 can use auxiliary synchronization channel (S-SCH) to obtain, and the information that will obtain in the step 308,309 can be used downlink reference signal (DL-CRS) and physics to broadcast channel (PBCH) channel and obtain.

The signal of embodiment two, Wideband Code Division Multiple Access (WCDMA) (WCDMA) system is intercepted flow process, as shown in Figure 4, comprising:

Step 401, carrier frequency detects; Obtain carrier frequency.

Step 402, slot synchronization;

Step 403, scrambler code group identification and frame synchronization; Obtain scrambler group information.

Step 404, scrambler identification; Obtain scrambling code information.

Step 405, system information reads.

The information that wherein will obtain in the step 401,402 can use primary synchronization channel (P-SCH) to obtain, the information that will obtain in the step 403 can use the S-SCH channel to obtain, and the information that will obtain in the step 404,405 can use Primary Common Control Physical Channel (P-CCPCH) to obtain.

The signal of embodiment three, code division multiple access and evolution thereof (CDMA1X or EVDO) system is intercepted flow process as shown in Figure 5, comprising:

Step 501, carrier frequency detects; Obtain carrier frequency.

Step 502, the skew identification of local pseudorandom (PN) sequence; Obtain PN sequence offset information.

Step 503, time synchronized can be undertaken synchronously by obtaining the parameters such as long code state (LC_STATE), system time (SYS_TIME), pilot offset (PILOT_PN);

Step 504, system information reads.

The information that wherein will obtain in the step 501,502 can use Forward Pilot Channel (F-PICH) to obtain, the information that will obtain in the step 503 can be used synchronously (F-SYNC) signal acquisition of forward direction, and the information that will obtain in the step 504 can use Forward Paging Channel (F-PCH), forward broadcast control channel (F-BCCH), Forward Common Control Channel (F-CCCH) to obtain.

The signal of embodiment four, TD SDMA (TD-SCDMA) system is intercepted flow process as shown in Figure 6, comprising:

Step 601, carrier frequency detects; Obtain carrier frequency.

Step 602, down-going synchronous (SYNC_DL) recognition sequence and downlink frame synchronization; Obtain the SYNC_DL sequence information.

Step 603, the identification of scrambler and basic training sequences (midamble) code; Obtain scrambler and midamble code.

Step 604, system information reads.

The information that wherein will obtain in the step 601,602 can use descending pilot frequency time slot (DwPTS) to obtain, the information that will obtain in the step 603 can use Primary Common Control Physical Channel (P-CCPCH) to obtain, and the information that will obtain in the step 604 can use the P-CCPCH channel to obtain.

The signal of embodiment five, global mobile communication (GSM) system is intercepted flow process as shown in Figure 7, comprising:

Step 701, carrier frequency detects; Obtain carrier frequency.

Step 702, Frequency Synchronization and time are slightly synchronous; Obtaining the thick time synchronized line frequency of going forward side by side by frequency correction bursts sequence (FB) corrects partially.

Step 703, the time essence is obtained base station identity code (BSIC) and frame number synchronously; By the thick position of estimating synchronously Synchronization Burst sequence (SB), obtain exact time synchronization, by the decoding of SB being obtained BSIC and the frame number of base station.

Step 704, system information reads.

The information that wherein will obtain in the step 701,702 can be obtained by frequency of utilization correction channel (FCCH), the information that will obtain in the step 703 can use synchronizing channel (SCH) to obtain, and the information that will obtain in the step 704 can use broadcast channel (BCH) to obtain.

In addition, just no longer given an example here for the flow process of intercepting of other wireless communication systems such as personal handhold telephone system (PHS) system, Digital Cellular System (DCS) system.

The signal of above-mentioned wireless communication system is intercepted and can be carried out successively, also can carry out simultaneously, specifically to the order of intercepting of the wireless communication system that may exist, and the wireless communication system that need to intercept, can decide according to actual needs, namely can only intercept the signal of a certain wireless communication system, the signal of any a plurality of wireless communication systems that also can intercept needs is intercepted.

The embodiment of the invention also provides a kind of mobile terminal signal checkout gear, as shown in Figure 8, comprising:

Signal receiving module 801 is used for timesharing and receives the downstream signal of wireless communication system in the monitoring range and the upward signal of target monitoring residential quarter;

Signal processing module 802 for the downstream signal of intercepting the wireless communication system in the monitoring range by described signal receiving module, obtains the community configured information of the wireless communication system in the monitoring range; Intercept the upward signal of the target monitoring residential quarter in the monitoring range by described signal receiving module, calculate the up characteristic information that whether exists for reflection target monitoring cell uplink signal;

Compare according to described up characteristic information and the thresholding of presetting, judge whether to detect the upward signal of portable terminal according to comparative result.

Wherein, described signal receiving module 801 can comprise one or more radio frequency processing links; Each described radio frequency processing link can corresponding one or more wireless communication systems signal receive.

For example shown in Fig. 8, comprise the LTE radio frequency processing link 807 of CDMA1x/EVDO radio frequency processing link 806, corresponding LTE TDD or LTE FDD system of WCDMA radio frequency processing link 805, corresponding CDMA1X or the EVDO system of the TD-SCDMA radio frequency processing link 804 of the GSM radio frequency processing link 803 of corresponding GSM or DCS system, corresponding TD-SCDMA system, corresponding WCDMA system in the signal receiving module 801; All intercepting module 802 with signal links to each other.

Certainly, can also comprise the radio frequency processing link of corresponding other wireless communication system in the transceiver module 801, just give an example no longer one by one here.

Wherein, include in each radio frequency processing link: filter 808, amplifier 809, receiver unit 810, D/A conversion unit 811, antenna 812.

Filter 808 is used for the wireless telecommunication system signal of the correspondence that receives by antenna 812 is carried out filtering;

Amplifier 809 is used for described filter 808 filtered signals are amplified;

Transceiver unit 810 is used for the signal after described amplifier 809 amplifications is carried out demodulation;

D/A conversion unit 811 is used for being converted to digital signal from the restituted signal that receiver unit 810 receives and sends to signal comparison module 802.

When listening to a plurality of different districts of same standard wireless communication system in the monitoring range, if need to monitor these a plurality of different districts, can monitor simultaneously, also can adopt the mode of time-division, in turn by the upward signal to radio frequency processing link monitoring respective cell that should the standard wireless communication system, the cycle of concrete time division way can be configured according to actual needs in different time sections.

As other embodiment, intercept and monitor needs according to actual, can include only the radio frequency processing link of corresponding some wireless communication systems in the signal receiving module 801, also can comprise a plurality of radio frequency processing links of corresponding any a plurality of wireless communication systems.

In addition, for the signal that guarantees mobile terminal signal checkout gear and outside mobile network synchronous, the mobile terminal signal checkout gear of the embodiment of the invention can re-start the process of intercepting at work at a certain time interval, with the synchronous tracking of realization time and frequency and to the adaptation of wireless communication system configuration variation in the monitoring range, can re-start according to the community configured information of described local record time and the Frequency Synchronization of residential quarter in the upper frequency that has once searched the residential quarter; Perhaps again take wireless communication system radio-frequency channel grid as step-length, in the working frequency range scope at the down channel place of wireless communication system, carry out Cell searching.

For described signal processing module 802, according to 3 kinds that enumerate in the embodiment of the method up characteristic information computational methods and corresponding threshold comparison method, correspondingly for following 3 kinds of embodiment.

Embodiment one, as shown in figure 11 comprises:

Power calculation unit 1101, according to cell timing information, frequency information, the signal bandwidth in the described community configured information, upward signal to the target monitoring residential quarter is sampled, by the signal of sampling and the uplink receiving power of the conjugation accumulation calculating target monitoring residential quarter of this sampled signal;

Identifying unit 1102 compares described uplink receiving power and the thresholding of presetting, if greater than default thresholding, then judges the upward signal that detects portable terminal.

Embodiment two, as shown in figure 12 comprises:

Ratio calculation unit 1201 carries out channel estimating according to the ascending pilot channel in the described community configured information or pilot information, calculates the upward signal power of target monitoring residential quarter and the ratio of interference power;

Identifying unit 1202 compares described ratio and the window signal-noise ratio threshold of presetting, if greater than described window signal-noise ratio threshold, then judges the upward signal that detects portable terminal.

Embodiment three, as shown in figure 13 comprises:

Difference computational unit 1301, Random Access Channel and random access code group information according to the residential quarter in the described district configuration information, the random access sequence that carries out the target monitoring residential quarter detects, calculate average power poor of the power of relevant peaks window and relevant peaks front window, and the average power of the power of relevant peaks and relevant peaks rear window is poor;

Identifying unit 1302, poor with the average power of the power of described relevant peaks window and relevant peaks front window, and the difference of the average power of the power of relevant peaks and relevant peaks rear window compares with the contrast thresholding of presetting, if all greater than described contrast thresholding, then judge the upward signal that detects portable terminal.

Above-mentioned each unit, the concrete operation of carrying out and step can reference method embodiment, repeat no more here.

In addition, as shown in figure 10, the embodiment of the invention also provides a kind of signal detection system of portable terminal, comprises the signal supervisory instrument 1001 of one or more portable terminals, one or more control terminals 1002.

The signal supervisory instrument 1001 of one or more portable terminals can be placed on different job sites according to user and operational environment different, they can pass through power line, Serial Port Line, the different mode such as netting twine is connected to control terminal 1002, control terminal 1002 does not require and is arranged on the job site, also can carry out Long-distance Control to the signal supervisory instrument 1001 of portable terminal by network, control terminal 1002 can be computer or server etc.

Wherein, the signal supervisory instrument 1001 of described portable terminal is used for the community configured information by the wireless communication system in the signal acquisition monitoring range of intercepting the wireless communication system in the monitoring range; The community configured information of the described wireless communication system that listens to is reported described control terminal 1002; Receive described control terminal 1002 and generate the signal monitoring parameter of corresponding target monitoring residential quarter according to described community configured information; According to the signal monitoring parameter that receives from described control terminal, calculate the up characteristic information that is used for reflection target monitoring cell uplink signal power situation; Described up characteristic information and the thresholding of presetting are compared;

Described control terminal 1002 is used for receiving the community configured information that described mobile terminal signal checkout gear 1001 reports, and generates the signal monitoring parameter of corresponding target monitoring residential quarter, sends to described mobile terminal signal checkout gear 1001.

In addition, control terminal 1002 can also be used for the signal supervisory instrument 1001 of described portable terminal is realized parameter configuration, fault management, status monitoring and daily record (log) record etc.

The concrete structure of the signal supervisory instrument 1001 of the portable terminal in the native system and function can with reference to said apparatus embodiment, repeat no more here.

The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (10)

1. a mobile terminal signal detection method is characterized in that, the method comprises:

Obtain the community configured information of the wireless communication system in the monitoring range by the downstream signal of intercepting the wireless communication system in the monitoring range;

Intercept the upward signal of the target monitoring residential quarter in the monitoring range, and calculate the up characteristic information that whether exists for reflection target monitoring cell uplink signal according to described community configured information;

Described up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result.

2. mobile terminal signal detection method as claimed in claim 1, it is characterized in that, described calculating according to described community configured information is used for the up characteristic information whether reflection target monitoring cell uplink signal exists, up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result, comprising:

According to cell timing information, frequency information, the signal bandwidth in the described community configured information, the upward signal of target monitoring residential quarter is sampled, by the signal of sampling and the uplink receiving power of the conjugation accumulation calculating target monitoring residential quarter of this sampled signal;

Described uplink receiving power and the thresholding of presetting are compared, if greater than default thresholding, then judge the upward signal that detects portable terminal.

3. mobile terminal signal detection method as claimed in claim 2 is characterized in that, the uplink receiving power of described calculating target monitoring residential quarter comprises:

For FDD system, calculate uplink receiving power in up operating frequency by time slot;

For TDD system, calculate uplink receiving power at ascending time slot by time slot.

4. mobile terminal signal detection method as claimed in claim 1, it is characterized in that, described calculating according to described community configured information is used for the up characteristic information whether reflection target monitoring cell uplink signal exists, up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result, comprising:

Carry out channel estimating according to the ascending pilot channel in the described community configured information or pilot information, calculate the upward signal power of target monitoring residential quarter and the ratio of interference power;

Described ratio and the window signal-noise ratio threshold of presetting are compared, if greater than described window signal-noise ratio threshold, then judge the upward signal that detects portable terminal.

5. mobile terminal signal detection method as claimed in claim 1, it is characterized in that, the described up characteristic information that is used for reflection target monitoring cell uplink RST that calculates according to described community configured information, up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result, comprising:

According to Random Access Channel and the random access code group information of the residential quarter in the described district configuration information, the random access sequence that carries out the target monitoring residential quarter detects, and calculates the poor of the power of relevant peaks and the mean value in the average window before and after the relevant peaks;

The power of described relevant peaks and the difference of the mean value in the average window before and after the relevant peaks are compared with the contrast thresholding of presetting, if greater than described contrast thresholding, then judge the upward signal that detects portable terminal.

6. a mobile terminal signal checkout gear is characterized in that, this device comprises:

Signal receiving module is used for timesharing and receives the downstream signal of wireless communication system in the monitoring range and the upward signal of target monitoring residential quarter;

Signal processing module for the downstream signal of intercepting the wireless communication system in the monitoring range by described signal receiving module, obtains the community configured information of the wireless communication system in the monitoring range; Intercept the upward signal of the target monitoring residential quarter in the monitoring range by described signal receiving module, calculate the up characteristic information that whether exists for reflection target monitoring cell uplink signal;

Described up characteristic information and the thresholding of presetting are compared, judge whether to detect the upward signal of portable terminal according to comparative result.

7. mobile terminal signal checkout gear as claimed in claim 6 is characterized in that, described signal processing module comprises:

Power calculation unit, according to cell timing information, frequency information, the signal bandwidth in the described community configured information, upward signal to the target monitoring residential quarter is sampled, by the signal of sampling and the uplink receiving power of the conjugation accumulation calculating target monitoring residential quarter of this sampled signal;

Identifying unit compares described uplink receiving power and the thresholding of presetting, if greater than default thresholding, then judges the upward signal that detects portable terminal.

8. mobile terminal signal checkout gear as claimed in claim 6 is characterized in that, described signal processing module comprises:

The ratio calculation unit carries out channel estimating according to the ascending pilot channel in the described community configured information or pilot information, calculates the upward signal power of target monitoring residential quarter and the ratio of interference power;

Identifying unit compares described ratio and the window signal-noise ratio threshold of presetting, if greater than described window signal-noise ratio threshold, then judges the upward signal that detects portable terminal.

9. mobile terminal signal checkout gear as claimed in claim 6 is characterized in that, described signal processing module comprises:

Difference computational unit, Random Access Channel and random access code group information according to the residential quarter in the described district configuration information, the random access sequence that carries out the target monitoring residential quarter detects, calculate average power poor of the power of relevant peaks window and relevant peaks front window, and the average power of the power of relevant peaks and relevant peaks rear window is poor;

Identifying unit, poor with the average power of the power of described relevant peaks window and relevant peaks front window, and the difference of the average power of the power of relevant peaks and relevant peaks rear window compares with default contrast thresholding, if all greater than described contrast thresholding, then judges the upward signal that detects portable terminal.

10. a mobile terminal signal detection system is characterized in that, this system comprises: mobile terminal signal checkout gear and control terminal;

Described mobile terminal signal checkout gear is used for the community configured information by the wireless communication system in the signal acquisition monitoring range of intercepting the wireless communication system in the monitoring range;

Described community configured information is reported described control terminal; Receive described control terminal and generate the signal monitoring parameter of corresponding target monitoring residential quarter according to described community configured information; According to the signal monitoring parameter that receives from described control terminal, calculate the up characteristic information that whether exists for reflection target monitoring cell uplink signal; Described up characteristic information and the thresholding of presetting are compared;

Described control terminal is used for receiving the community configured information that described mobile terminal signal checkout gear reports, and generates the signal monitoring parameter of corresponding target monitoring residential quarter, sends to described mobile terminal signal checkout gear.

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