CN1777074A - Method for monitoring wireless high-frequency-amplification station isolation degree using pilot frequency multi-channel signal - Google Patents
Method for monitoring wireless high-frequency-amplification station isolation degree using pilot frequency multi-channel signal Download PDFInfo
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- CN1777074A CN1777074A CN 200510061733 CN200510061733A CN1777074A CN 1777074 A CN1777074 A CN 1777074A CN 200510061733 CN200510061733 CN 200510061733 CN 200510061733 A CN200510061733 A CN 200510061733A CN 1777074 A CN1777074 A CN 1777074A
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Abstract
The method includes following steps: (1) reading out process data in inner searcher of built in monitoring module inside wireless direct station system; the data includes ratio of carry and interfere Ec/Io and timing mark; (2) calculating out ratio of carry and interfere of pilot signal in main path for wireless direct station, and ratio of carry and interfere of pilot signal in multiple paths fed from the direct station under restriction of time window; (3) calculating out allowance of separation for system of direct station; allowance of separation = ratio of carry and interfere of pilot signal in main path - ratio of carry and interfere of pilot signal in multiple paths fed from the direct station. Useful effects are: monitoring allowance of separation at any time so that system of direct station is protected in state of enough allowance (adjusting gain of direct station). The invention makes system of direct station high reliable, high safe and high self-adaptive.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of method of utilizing pilot tone multi-path signal monitoring wireless repeater isolation.
Background technology
Mobile communication has huge effect in our life, wherein the wireless coverage technology of mobile communication is also in continuous development, the operation commercial city requires seamless covering now, there is China scarcely populated again, the population distribution inequality, in a lot of places, for example rural, highway, railway, the tunnel, small-sized underground parking, small building is indoor, pilot pollution district (cdma system), because telephone traffic is little, and the consideration of cost, and the consideration of mobile phone switch speed etc., all need a large amount of wireless discharging-directly stations to cover, and wireless discharging-directly station open and in service, the isolation of antenna is the major parameter that system considers and considers during project installation, if the isolation surplus between donor antenna and the retransmitting antenna is less than system requirements (generally requiring greater than 15dB), can cause systematic function to descend rapidly, distorted signals, waste power, can cause self-excitation when serious, disturb network, because the soft handoff mechanism uplink interference can expand a sheet of base station to, influence the covering of base station at cdma system (comprising WCDMA/CDMA2000), also can be inclined to one side by wind in the real system owing to environmental change such as antenna, antenna is side's newly-built reverberation etc. nearby, all can influence isolation; Monitoring isolation surplus becomes very important to the safe operation of network in real time.
Conventional method is, is with a signal source and a frequency spectrograph during installation, receives donor antenna and retransmitting antenna respectively and comes isolation between test antenna, and when only being fit to open, or personnel also will stop repeater work to on-the-spot; Another kind is to be with a signal source and frequency spectrograph (module) to detect isolation in inside, repeater, increase cost also because the certain signal of emission can disturb the network operation; Another kind method is that the down output power that detects the repeater makes it to produce never amplitude limit, because amplitude limit just might be self-excitation, but this method is to differentiating insufficient sensitivity (do not reach and detect the requirement of isolation surplus greater than 15dB) near the situation of self-excitation; Also having a kind of is frequency spectrum detection to the repeater output signal, promptly detect the frequency spectrograph (or module) of the flatness of (CDMA2000 and WCDMA system) in the channel strip, because can cause frequency spectrum unevenness in the delivery channel band when isolation surplus is not enough, but the sensitivity of this method also not high enough (do not reach and detect the requirement of isolation surplus greater than 15dB); Also increase cost.
Summary of the invention
The present invention will solve the defective of above-mentioned prior art, and a kind of method of utilizing pilot tone multi-path signal monitoring wireless repeater isolation is provided.
The present invention solves the technical scheme that its technical problem adopts.This method of utilizing pilot tone multi-path signal monitoring wireless repeater isolation, this method mainly comprises the steps:
1.1), the process data of the inside searcher by reading the built-in monitoring module of radio repeater system, i.e. the data value of a plurality of multipath pilot signals of receiving of receiver, this data value comprise and carry/do than Ec/Io and timescale data; When the network multicarrier, the working channel of monitoring module should be in the middle of the working channel of repeater;
1.2), the pilot tone of carrying/doing the multipath signal of repeater feedback when that calculates wireless discharging-directly station main path pilot signal carries/dried ratio, the pilot tone of above-mentioned repeater feedback multipath signal is carried/is done than comprising that time window retrains;
1.3), calculate direct discharging station isolation surplus, ratio is carried/done to the pilot tone that ratio-feedback multipath signal was carried/done to isolation surplus=main path pilot signal.
Method concrete steps of the present invention are as follows:
2.1), read one group of multipath pilot signal by the monitoring repeater module after, find earlier to carry/do than maximum main path pilot signal and with this signal the time be designated as the time point location, find out to be equivalent to whether have in the time delay window that the repeater time delay adds antenna feeder coupling path time delay (scope that the time delay that varies in size according to the engineering different delay may change is the time delay window) another or a plurality of multipath pilot signal after this time;
2.2) if having, then this multipath pilot signal is carried/done to carry/do than (Ec/Io) with the main path pilot signal and compare than (Ec/Io), if this difference, promptly present actual isolation surplus is greater than isolation surplus set point (as 15dB), and then system is safe;
2.3) if this difference less than set point, then need to get rid of whether this identical multipath pilot signal is arranged on the main path, method is to test once again after reducing the repeater gain, the multipath pilot signal that promptly reduces after the gain again in the time for reading window is carried/dried ratio (Ec/Io), and compares with the main path pilot signal of this moment; What proof recorded if its difference becomes big in proportion is isolation surplus (isolation is constant, and when gain diminished, it is big that the isolation surplus becomes), need take measures to prevent the generation (as reducing gain) of self-excitation; As not changing this multipath pilot signal then is multipath pilot signal on the main RX path, recovers former gain back and continues to detect; If its difference changes and change in gain is not to change in proportion, it then may be the multipath signal mixing on isolation residual signal and the alms giver's RX path, this method of testing accuracy is influenced at this moment (can be by changing the direct discharging station time delay as increasing cable to avoid the identical time delay multi-path problem on alms giver's RX path, or the direction of change donor antenna, or the lobe of change donor antenna etc., to eliminate this responsive multipath), need to continue monitoring (in case of necessity and give to report to the police).
2.4) if the interior no multipath pilot signal of time window, then system's isolation surplus is on detection sensitivity, (the I of the monitoring of pilot tone multipath (Ec/Io) reaches-30dB, just feedback pilot tone this moment (Ec/Io) is lower than-30dB, the carrying of main path/when dried ratio (Ec/Io) is the worst generally all greater than-15dB), promptly the isolation surplus is fine.
2.5) if a plurality of qualified multipath pilot signals are arranged, subtract each other with the main path pilot signal again after then should being converted into the power addition to a plurality of qualified multipath pilot signals; Ask for the isolation surplus again.
Ec/Io subtracts each other (between each Ec/Io that the same time is obtained) except utilization, also can calculate isolation surplus (because the pilot power value of base station is constant) with the pilot power (also can accumulate) of main pilot power (also can accumulate) and feedback.(pilot power=RX receives the Ec/Io of gross power * pilot tone).These method concrete steps are as follows: try to achieve earlier the energy of the pilot energy of main path and feedback pilot tone and repeatedly accumulation try to achieve its smooth value and measure the randomness error to eliminate part, get the dBm scale value of the logarithm value of its energy again, try to achieve the isolation surplus again, the dBm scale value of the smooth value of the energy of the dBm scale value-feedback multipath signal of the smooth value of the energy of isolation surplus=main path pilot signal.
The effect that the present invention is useful is: monitor the isolation surplus at any time; the protection direct discharging station can not be in the not enough state of isolation surplus (regulating repeater gain etc.) and cooperate some other network quality detection technique; make direct discharging station highly reliable, high safety, self adaptation.
Characteristics contrast other technologies of the present invention:
Onlinely need not shut down.
Utilize the original monitoring module of system not need to increase monitoring hardware.
Description of drawings
Fig. 1 is that feedback signal of the present invention flows to schematic diagram;
Fig. 2 is a direct discharging station schematic diagram of the present invention;
Fig. 3 is a time window schematic diagram of the present invention;
Fig. 4 is a feedback pilot signal time-domain diagram of the present invention;
Fig. 5 is the sub-process figure of isolation residual signal of the present invention;
Fig. 6 is the main flow chart that band of the present invention is got rid of alms giver's multipath interference;
Fig. 7 is that system simulation test of the present invention connects block diagram.
Embodiment
The invention will be described further below in conjunction with drawings and Examples:
As shown in Figure 2: A, donor antenna, effect are to receive the signal of coming in the base station; Monitoring in B, the repeater and using coupler, effect is to give monitoring module a signal coupling part of coming in the base station; The duplexer of BS in C, the repeater (base station end); D, descending LNA; E, intermediate frequency filtering and gain-adjusted etc. generally contain the time delay bigger (2～10 microsecond) of these parts of Surface Acoustic Wave Filter (or digital filter adds digital-to-analogue and analog to digital converter); F, power amplifier; G, MS (cellular service district end) duplexer; H, retransmitting antenna (area of coverage antenna) effect is that the signal that has amplified is sent to service area; I, up loop (principle is equal to descending loop), effect are the upward signal of mobile phone to be amplified beam back the base station; J, wireless monitor module, former effect are the communication modems that usefulness is safeguarded in transmission alarm signal and remote debugging, and be existing again as pilot tone multipath parameter extraction signal source; The control centre of K, repeater (CPU), the management of original work repeater now increases isolation surplus processing capacity (comprising alarm) (read the pilot tone multipath signal data of monitoring module and handled differentiation etc.).The big arrow at figure top is the signal feedback path (isolation between antennae) between antenna.
As shown in Figure 3: briefly illustrate a pilot signal through a plurality of pilot tone feedback signal time domain distribution maps that the feedback behind the direct discharging station produces (back for the third time more than too for a short time omission of feedback).
This method of utilizing pilot tone multi-path signal monitoring wireless repeater isolation, concrete steps are as follows:
2.1), read one group of multipath pilot signal by the monitoring repeater module after, find earlier to carry/do than maximum main path pilot signal and with this signal the time be designated as the time point location, find out to be equivalent to whether have in the time delay window that the repeater time delay adds antenna feeder coupling path time delay (scope that the time delay that varies in size according to the engineering different delay may change is the time delay window) another or a plurality of multipath pilot signal after this time;
2.2) if having, then this multipath pilot signal is carried/done to carry/do than (Ec/Io) with the main path pilot signal and compare than (Ec/Io), if this difference, promptly present actual isolation surplus is greater than isolation surplus set point (as 15dB), and then system is safe;
2.3) if this difference less than set point, then need to get rid of whether this identical multipath pilot signal is arranged on the main path, method is to test once again after reducing the repeater gain, the multipath pilot signal that promptly reduces after the gain again in the time for reading window is carried/dried ratio (Ec/Io), and compares with the main path pilot signal of this moment; What proof recorded if its difference becomes big in proportion is isolation surplus (isolation is constant, and when gain diminished, it is big that the isolation surplus becomes), need take measures to prevent the generation (as reducing gain) of self-excitation; As not changing this multipath pilot signal then is multipath pilot signal on the main RX path, recovers former gain back and continues to detect; If its difference changes and change in gain is not to change in proportion, it then may be the multipath signal mixing on isolation residual signal and the alms giver's RX path, this method of testing accuracy is influenced at this moment (can be by changing the direct discharging station time delay as increasing cable to avoid the identical time delay multi-path problem on alms giver's RX path, or the direction of change donor antenna, or the lobe of change donor antenna etc., to eliminate this responsive multipath), need to continue monitoring (in case of necessity and give to report to the police).
2.4) if the interior no multipath pilot signal of time window, then system's isolation surplus is on detection sensitivity, (the I of the monitoring of pilot tone multipath (Ec/Io) reaches-30dB, just feedback pilot tone this moment (Ec/Io) is lower than-30dB, the carrying of main path/when dried ratio (Ec/Io) is the worst generally all greater than-15dB), promptly the isolation surplus is fine.
The explanation of time window: promptly the possible 60 meters time delays of maximum feeder line length from repeater time delay (feeder line length is 0) to conventional engineering add antenna the feedback path time delay as 50 meters overall delays corresponding to time delay for till (60/0.88*0.0033+50*0.0033=0.39 microsecond); If the time delay of repeater is 3.67 microseconds, then the time delay window is 3.67～4.06 microseconds (promptly using the scope of the different possible feedback time of environment).See Fig. 3.
2.5) if a plurality of qualified multipath pilot signals are arranged, subtract each other with the main path pilot signal again after then should being converted into the power addition to a plurality of qualified multipath pilot signals; Ask for the isolation surplus again.
The explanation of isolation surplus method of real-time:
3.1, the isolation surplus of wireless discharging-directly station (is that isolation deducts the direct discharging station gain, annotate: change in gain, change with isolation and all can make the isolation surplus change) under the not enough condition, also just (radio repeater system) is equivalent to the signal that has been exaggerated is fetched amplification (time delay is that the time delay of repeater adds the time delay between antenna feeder) once more, (repeater main frame time delay (known) is (according to machine between 2～10 microseconds because direct discharging station has enough time delays, concrete machine is definite value such as we in order to the machine of test is 3.67 microseconds) add external feedback antenna feeder path (according to different approximately (feeder line length is that 0 time delay is 0) of engineering to possible 60 meters time delays of maximum feeder line length of conventional engineering add between antenna the feedback path time delay as 50 meters overall delays corresponding to time delay be (60/0.88*0.0033+50*0.0033=0.39 microsecond) till) time delay), because time window is known, (0～-30dB in) can be detected as long as the carrying of this pilot tone/dried ratio (Ec/Io) satisfies detection range.
3.2, pilot signal itself is that the repeating signal of fixing is to adopt Synchronous Detection, can detect (for example: the Ec/Io that actual mobile phone utilization combined synchronous demodulation technique can reach the multipath weight of pilot frequency is the sensitivity of-30dB) in the environment of low carrier-to-noise ratio.
3.3, pilot signal can distinguish the different multipath signal of time delay detect respectively obtain different time scale values (many through between the time delay difference=each the time scale value representative the difference of clock); Temporal resolution is WCDMA's (1/ (3840000*8)=3.255*10
-8Second)) and (1/ (1228800*8)=1.017*10 of CDMA2000
-7Second).
3.4, pilot signal is the WCDMA system basis of (comprising CDMA2000), just the process data of the searcher of the receiver inside of monitoring module (parameter of the multipath signal of the inside pilot tone of wireless system network (comprise and carry/do than (Ec/Io) and timescale data)) need only be read promptly available (needing relevant password and the instruction and the decoding etc. of monitoring module producer).
3.5, because might existing the repeater to receive, actual environment itself comprises the multipath signal of making (direct discharging station time delay) in the time delay window that isolation detects with our repeater in the donor signal, then needed the gain 1～2dB that turns down the repeater to distinguish if distinguish, if the signal of isolation then this moment, to carry/do than subtracting each other the value that draws be that the isolation surplus can become greatly that (notes: isolation is constant on many pilot tone ground through signal and main path, when gain diminishes, it is big that the isolation surplus becomes), if the many isolation surpluses (the isolation surplus of supposing) through then trying to achieve of alms giver can be constant; Can come they branches according to above-mentioned difference.
3.6, because the influence of tested person precision, can consider to avoid to be lower than-data of the Ec/Io of 20dB (only assess, make trust data to being higher than this value), at the Ec/Io of main multipath during less than-6dB, Ec/Io value for feedback is lower, can use filtration and smoothing technique or reduce isolation surplus (dropping to 10dB etc.) temporarily, the Ec/Io of main multipath during greater than-6dB (return difference that adds 1dB to-5dB) remake accurate measurement (the isolation surplus is greater than 15dB).
3.7, calculate to derive
As shown in Figure 1, donor signal comes to make gross energy increase the Io change greatly with the signal stack of feedback, but the component energy values of each pilot tone does not superpose, because markers is different, the Ec/Io of each pilot tone diminishes (gross energy increases Io and becomes big) relatively, and the difference (logarithm value) of dominant pilot and feedback pilot tone equals the isolation surplus; The difference of the Ec/Io of dominant pilot and feedback pilot tone (prerequisite of synchronization) just.
The Pd=donor signal; Pdp=alms giver's pilot signal; The Pr=feedback signal; Prp=feedback pilot signal; Pout=repeater output signal; The Ec/Io of the dominant pilot at N=Pin place; The Ec/Io of the feedback pilot tone at M=Pin place; The gain of G=repeater; L=isolation surplus; I=repeater isolation; Unit is dB or dBm.
Then: repeater total input signal Pin=10log (10
Pd/10+ 10
Pr/10) since feedback can be infinite time circulation, we only calculate a feedback (be higher than 10dB when above at I greater than G, back more and more littler ignored)
Pout＝Pin+G
Pr＝Pout-I＝(Pin+G)-I
Prp＝(Pdp+G)-I
N＝Pdp-Pin
M＝Prp-Pin＝(Pdp+G)-I-Pin＝N-(I-G)
Two formula drew above N-M=I-G=L was comprehensive
Just: the pilot tone Ec/Io=isolation surplus of the many warps of pilot tone Ec/Io-feedback of main path
The monitoring principle explanation:
The multipath signal principle of stacking:
Wireless discharging-directly station is sneaked into the donor signal of reception to the signal that had amplified again because the isolation surplus is not enough, meets the signal mixing principle: the energy that the resultant signal that enters the reception of machine equals donor signal and feedback signal superposes
Resultant signal (input)=donor signal+feedback signal (principle of energy superposition)
Isolation surplus=isolation-repeater gain (logarithm value)
Feedback signal=repeater output-isolation=(resultant signal (input)+repeater gain)-isolation (logarithm value)
Isolation surplus=resultant signal (input)-feedback signal (logarithm value) (by top two derivations of equation)
The pilot tone of feedback=alms giver's pilot tone+repeater gain-isolation (logarithm value)
The Ec/Io=isolation surplus (top formula changes) (logarithm value) of the Ec/Io-feedback of the pilot tone=isolation of alms giver's pilot tone-feedback-repeater gain=(alms giver's pilot tone-resultant signal)-(with the pilot tone-resultant signal of feedback)=main path
Example 1: suppose isolation surplus=15dB, donor signal is unified to be 0dBm
The energy of the energy=0dBm of energy+feedback of total signal energy=alms giver+(total signal energy of 15dB) gets resultant signal ≈ 0.1dBm has promptly increased 0.1dB than donor signal
The deterioration 0.1dB that just main Ec/Io comes than the alms giver (pilot tone that the alms giver comes reduces 0.1dB)
Be the main Ec/Io-0.1 that the main Ec/Io=alms giver in the resultant signal comes
The Ec/Io-0.1 that main Ec/Io+ repeater gain-isolation=(isolation surplus)+alms giver comes that in like manner can draw in the dominant pilot=resultant signal after the feedback annotates: ignore the secondary feedback signal
Suppose: alms giver's Ec/Io=-5dB is the main Ec/Io=-5-0.1=-5.1dB in the resultant signal then
The Ec/Io=-5-0.1-15=-20.1dBm of the multipath of feedback then
CPU tries to achieve: Ec/Io=-5.1-(the 15.1)=15dB of the main Ec/Io-feedback pilot tone multipath in isolation surplus=resultant signal
Example 2: isolation surplus=10dB, donor signal is unified to be 0dBm
The energy of the energy=0dBm of energy+feedback of resultant signal=alms giver+(total signal energy of 10dB) draws resultant signal ≈ 0.4dBm has promptly increased 0.4dB than the alms giver
The deterioration 0.4dB that just main Ec/Io comes than the alms giver (all pilot tones that the alms giver comes reduce 0.4dB)
Be the main Ec/Io that the main Ec/Io=-0.4+ alms giver in the resultant signal comes
The Ec/Io-0.1 that main Ec/Io+ repeater gain-isolation=(isolation surplus)+alms giver comes that in like manner can draw in the dominant pilot=resultant signal after the feedback annotates: ignore the secondary feedback signal
Suppose: the main Ec/Io=-5.4dB in alms giver's the Ec/Io=-5dB resultant signal
The Ec/Io=-0.4-5-10=-15.4dBm of the multipath of feedback
CPU tries to achieve: Ec/Io=-5.4-(the 15.4)=10dB of the multipath of the main Ec/Io-feedback in isolation surplus=resultant signal
Lime light: the method for the test data of multipath, if on the base station arrives the alms giver path of reception antenna of repeater, include with the multipath signal of the same delay inequality of direct discharging station isolation surplus (when time delay numerical value is identical) and carry/do bigger frequently the time, system can not that be the multipath of isolation surplus respectively, system loses accuracy, (if can change parameter; As system's time delay (jumper) of repeater, with the direction of considering to avoid this responsive multipath or changing donor antenna, or the lobe of change donor antenna etc.); If be equal to the delay inequality of direct discharging station isolation feedback in main path and with the delay inequality of main path before receiving alms giver's multipath signal and having, and carry/do under the bigger frequently situation at this signal, can change carrying/the dried numerical value that compares of main path on the main path signal after the feedback meeting is added to feedback, can make that also measurement data is forbidden (to change the direction of donor antenna, or the lobe of change donor antenna etc., to eliminate this responsive multipath); In addition, owing to the descending power of wireless communication system load is that the Ec/Io of information source just of the base station just that changes of the situation along with the user also can change, so the Ec/Io of the main path that receives also can change, the Ec/Io of the multipath of feedback also can change, notice that the data error that obtains when multipath when feedback carries/do than (Ec/Io) near the demodulation lowest limit can become greatly, handling procedure to note multipath signal carrying/doing monitoring sensitivity when relatively lower (as filtration with smoothly); The calculating of isolation surplus only is suitable between one group of pilot tone multipath that synchronization obtains (otherwise after base station power changed, the Ec/Io of base station was also changing, front and back do not have comparativity); Note data smoothing and filtration.When the quantity of the multipath of direct discharging station alms giver pilot tone is too much, also be that disadvantageous (and the Ec/Io value of main path pilot tone is descending in addition to the demodulation of repeater area of coverage user mobile phone, reduce the monitoring availability of dynamic range), native system can provide repeater installation point received signal alms giver's pilot tone multipath quantity and size cases and show and (pass through OMT, that is: be used for the auxiliary repeater alms giver's receiving system (to obtain best source signal) of adjusting, repeater function software).When alms giver's main path have a plurality of and carry/when doing the pilot tone multipath that is more or less the same than (Ec/Io), software will be respectively is that main path is respectively reference time scale and differentiates respectively the not multipath of feedback is arranged with each pilot tone, handle more complicated, be also noted that and avoid the part of conflicting with the feedback time window.
The repeater isolation detects data
System simulation is tested as shown in Figure 6:
Test data analysis when one, not having positive feedback
2005-09-30 16:29:58.654 0x4003 WCDMA Finger Info for TA
Tx Pos(Cx8) ＝Not Valid(0xffff ffff)
Coherent Integration Length ＝1792
Non-Coherent Integration Length ＝1
Number of Paths ＝2
Path[0]：
Ec/Io ＝-3.9678
Position(Cx8) ＝234887
PSC and SSC ＝(21，0)
SSC of Primary CPICH ＝0
Primary CPICH OVSF ＝0
Finger index ＝0
Path[1]：
Ec/Io ＝-19.0338
Position(Cx8) ＝234875
PSC and SSC ＝(21，0)
SSC of Primary CPICH ＝0
Primary CPICH OVSF ＝0
Finger index ＝1
The test result statistics:
| Path[0]：Ec/Io | -3.9678dB |
| Path[1]：Ec/Io | -19.0338dB |
Number of Fingers ＝2
Finger[0]：
Finger ID ＝0
Lock Status ＝0x0f
TPC Combiner ID ＝0
Position(Cx8) ＝234889
Finger assigned state ＝0[Assigned to active set]
Finger state ＝0[Newly assigned finger]
CPICH divetsity indicator ＝YES
CPICH Ec/Io(primary) ＝-4.93dB
CPICH Ec/Io(diversity) ＝-31.69dB
CPICH Ec/Io(total) ＝-4.92dB
Scrambling Code(prim) ＝21
Chan(OVSF)Code ＝0
Finger[1]：
Finger ID ＝1
Lock Status ＝0x0f
TPC Combinet ID ＝0
Position(Cx8) ＝234876
Finger assigned state ＝0[Assigned to active set]
Finger state ＝0[Newly assigned finger]
CPICH diversity indicator ＝YES
CPICH Ec/Io(primary) ＝-20.44dB
CPICH Ec/Io(diversity) ＝-30.48dB
CPICH Ec/Io(total) ＝-20.03dB
Scrambling Code(prim) ＝21
Chan(OVSF)Code ＝0
The test result statistics:
| Finger[0]：CPICH Ec/Io(primary) | -4.93dB |
| Finger[1]；CPICH Ec/Io(primary) | -20.44dB |
Can analyze finger[0 from test data] and finger[1] the multidiameter delay of phase difference correspondence be 0.423 μ s, can affirm finger[0] be finger[1] the alms giver path on the pilot tone multipath.
Two, the test data analysis during the weak 4dB of positive feedback
The test result statistics:
| Path[0]：Ec/Io | -5.9725dB |
| Path[1]：Ec/Io | -10.1561dB |
| Path[2]：Ec/Io | -13.7518dB |
The test result statistics:
| Finger[0]：CPICH Ec/Io(primary) | -7.23dB |
| Finger[1]：CPICH Ec/Io(primary) | -11.26dB |
| Finger[2]：CPICH Ec/Io(primary) | -14.77dB |
Can analyze finger[0 from test data] and finger[1] the pilot tone multidiameter delay of phase difference correspondence be 3.678 μ s, can affirm finger[1] be finger[0] positive and negatively be fed to the pilot tone multipath that mobile phone receives behind the repeater; Finger[2] and finger[1] the multidiameter delay of phase difference correspondence be 3.776 μ s, can affirm finger[2] be finger[1] positive and negatively be fed to the pilot tone multipath that mobile phone receives behind the repeater;
Three, the test data analysis during the weak 9.5dB of positive feedback
2005-09-30 16:35:05.249 0x4003 WCDMA Finger Info for TA
Tx Pos(Cx8) ＝Not Valid(0xffff ffff)
Coherent Integration Length ＝1792
Non-Coherent Integration Length ＝1
Number of Paths ＝2
Path[0]：
Ec/Io ＝-3.8107
Position(Cx8) ＝249716
PSC and SSC ＝(21，0)
SSC of Primary CPICH ＝0
Primary CPICH OVSF ＝0
Finger index ＝0
Path[1]：
Ec/Io ＝-13.2522
Position(Cx8) ＝249828
PSC and SSC ＝(21，0)
SSC of Primary CPICH ＝0
Primary CPICH OVSF ＝0
Finger index ＝1
The test result statistics:
| Path[0]：Ec/Io | -3.8107dB |
| Path[1]：Ec/Io | -13.2522dB |
Number of Fingers ＝2
Finger[0]：
Finger ID ＝0
Lock Status ＝0x0f
TPC Combiner ID ＝0
Position(Cx8) ＝249717
Finger assigned state ＝0[Assigned to active set]
Finger state ＝0[Newly assigned finger]
CPICH diversity indicator ＝YES
CPICH Ec/Io(primary) ＝-5.58dB
CPICH Ec/Io(diversity) ＝-31.04dB
CPICH Ec/Io(total) ＝-5.57dB
Scrambling Code(prim) ＝21
Chan(OVSF)Code ＝0
Finger[1]：
Finger ID ＝1
Lock Status ＝0x0f
TPC Combiner ID ＝0
Position(Cx8) ＝249831
Finger assigned state ＝0[Assigned to active set]
Finger state ＝0[Newly assigned finger]
CPICH diversi ty indicator ＝YES
CPICH Ec/Io(primary) ＝-14.30dB
CPICH Ec/Io(diversity) ＝-31.04dB
CPICH Ec/Io(total) ＝-14.21dB
Scrambling Code(prim) ＝21
Chan(OVSF)Code ＝0
The test result statistics:
| Finger[0]：CPICH Ec/Io(primary) | -5.58dB |
| Finger[1]：CPICH Ec/Io(primary) | -14.30dB |
Can analyze finger[0 from test data] and finger[1] the pilot tone multidiameter delay of phase difference correspondence be 3.7109357 μ s, can affirm finger[1] be finger[0] positive and negatively be fed to the pilot tone multipath that mobile phone receives behind the repeater.Being calculated as of delay inequality (finger[1] Position (Cx8))-(finger[0] Position (Cx8))=114 Position (Cx8)=114* (1/ (3.84*10
6* 8))=3.7109357*10
-6Second
Four, the test data analysis during the weak 14.5dB of positive feedback
The test result statistics:
| Path[0]：Ec/Io | -4.3334dB |
| Path[1]：Ec/Io | -18.0733dB |
| Path[2]：Ec/Io | -18.4658dB |
The test result statistics:
| Finger[0]：CPICH Ec/Io(primary) | -5.15dB |
| Finger[1]：CPICH Ec/Io(primary) | -19.78dB |
| Finger[2]：CPICH Ec/Io(primary) | -18.80dB |
Can analyze finger[2 from test data] and finger[0] the pilot tone multidiameter delay of phase difference correspondence be 3.6783 μ s, can affirm finger[2] be finger[0] positive and negatively be fed to the pilot tone multipath that mobile phone receives behind the repeater.
Annotate: delay inequality is calculated as (finger[1] Position (Cx8))-(finger[0] Position (Cx8))=114Position (Cx8)=114* (1/ (3.84*106*8)) ≈ 3.71*10-6 second
Claims (4)
1, a kind of method of utilizing pilot tone multi-path signal monitoring wireless repeater isolation, it is characterized in that: this method mainly comprises the steps:
1.1), the process data of the inside searcher by reading the built-in monitoring module of radio repeater system, i.e. the data value of a plurality of multipath pilot signals of receiving of receiver, this data value comprise and carry/do than Ec/Io and timescale data;
1.2), the pilot tone of carrying/doing the multipath signal of repeater feedback when that calculates wireless discharging-directly station main path pilot signal carries/dried ratio, the pilot tone of above-mentioned repeater feedback multipath signal is carried/is done than comprising that time window retrains;
1.3), calculate direct discharging station isolation surplus, ratio is carried/done to the pilot tone that ratio-feedback multipath signal was carried/done to isolation surplus=main path pilot signal.
2, the method for utilizing pilot tone multi-path signal monitoring wireless repeater isolation according to claim 1, it is characterized in that: the said method concrete steps are as follows:
2.1), read one group of multipath pilot signal by the monitoring repeater module after, find earlier to carry/do than maximum main path pilot signal and with this signal the time be designated as the time point location, find out to be equivalent to whether have in the time delay window that the repeater time delay adds antenna feeder coupling path time delay another or a plurality of multipath pilot signal after this time;
2.2) if having, then this multipath pilot signal is carried/done than carrying/do than comparing with the main path pilot signal, if this difference, promptly present actual isolation surplus is greater than isolation surplus set point, then system is safe;
2.3) if this difference less than set point, then need to get rid of whether this identical multipath pilot signal is arranged on the main path, method is to test once again after reducing the repeater gain, the multipath pilot signal that promptly reduces after the gain again in the time for reading window is carried/dried ratio, and compares with the main path pilot signal of this moment; What proof recorded if its difference becomes big in proportion is the isolation surplus, need take measures to prevent the generation of self-excitation; As not changing this multipath pilot signal then is multipath pilot signal on the main RX path, recovers former gain back and continues to detect; If its difference changes and change in gain is not to change in proportion, eliminate this responsive multipath signal, need to continue monitoring;
2.4) if the interior no multipath pilot signal of time window, then system's isolation surplus is on detection sensitivity, and promptly the isolation surplus is fine;
2.5) if a plurality of qualified multipath pilot signals are arranged, compare with the main path pilot signal again after then should being converted into the power addition to a plurality of qualified multipath pilot signals; Ask for the isolation surplus again.
3, the method for utilizing pilot tone multi-path signal monitoring wireless repeater isolation according to claim 2, it is characterized in that: if its difference changes and change in gain is not to change in proportion, then many on isolation residual signal and the alms giver's RX path mix through signal, by changing the direction of direct discharging station time delay or change donor antenna, or the lobe of change donor antenna, to eliminate this responsive multipath signal.
4, a kind of method of utilizing pilot tone multi-path signal monitoring wireless repeater isolation, it is characterized in that: this method mainly comprise the steps: to try to achieve earlier the energy of the pilot energy of main path and feedback pilot tone and repeatedly accumulation try to achieve its smooth value and measure the randomness error to eliminate part, get the dBm scale value of the logarithm value of its energy again, try to achieve the isolation surplus again, the dBm scale value of the smooth value of the energy of the dBm scale value-feedback multipath signal of the smooth value of the energy of isolation surplus=main path pilot signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296471B (en) * | 2008-06-30 | 2012-02-29 | 华为技术有限公司 | Interference detection device and interference detection method |
| CN105929279A (en) * | 2016-05-16 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Multichannel microwave receiving assembly inter-channel isolation index testing device and method |
| CN113840365A (en) * | 2021-10-27 | 2021-12-24 | 广州市瀚云信息技术有限公司 | Power control method and device for repeater |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7035321B2 (en) * | 2002-11-20 | 2006-04-25 | Spotwave Wireless Canada, Inc. | Monitoring stability of an on-frequency repeater |
| CN1324911C (en) * | 2004-01-14 | 2007-07-04 | 中兴通讯股份有限公司 | Test apparatus and test method for isolation between antennas of wireless co-frequency direct amplifying station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296471B (en) * | 2008-06-30 | 2012-02-29 | 华为技术有限公司 | Interference detection device and interference detection method |
| CN105929279A (en) * | 2016-05-16 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Multichannel microwave receiving assembly inter-channel isolation index testing device and method |
| CN105929279B (en) * | 2016-05-16 | 2018-08-24 | 中国电子科技集团公司第四十一研究所 | Index testing device and method are isolated between a kind of Multi-channel microwave receiving unit road |
| CN113840365A (en) * | 2021-10-27 | 2021-12-24 | 广州市瀚云信息技术有限公司 | Power control method and device for repeater |
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