CN102811072B - Signal transmission method and device - Google Patents
Signal transmission method and device Download PDFInfo
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- CN102811072B CN102811072B CN201210262541.2A CN201210262541A CN102811072B CN 102811072 B CN102811072 B CN 102811072B CN 201210262541 A CN201210262541 A CN 201210262541A CN 102811072 B CN102811072 B CN 102811072B
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Abstract
The invention discloses a signal transmission method and a signal transmission device. The signal transmission method and the signal transmission device are used for solving the problem of reduction in signal transmission quality during the signal transmission of a microwave remote system in the prior art. The method comprises the following steps of: receiving an intermediate frequency signal comprising an intermediate frequency main signal and an intermediate frequency pilot signal, mixing the received intermediate frequency main signal and the received intermediate frequency pilot signal to obtain a mixed intermediate frequency signal, converting the mixed intermediate frequency signal into a radio frequency signal, and transmitting the radio frequency signal. The frequency offset of the received intermediate frequency pilot signal relative to set pilot carrier frequency is the same as that of the intermediate frequency main signal, so that the frequency offset of the two signals can be eliminated by mixing the intermediate frequency pilot signal and the intermediate frequency main signal, which have the same frequency offset, and the mixed intermediate frequency signal does not have any frequency offset component; and the intermediate frequency signal without the frequency offset is converted into the radio frequency signal for transmission, so that the signal transmission quality is improved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method for transmitting signals and device.
Background technology
In mobile communication system, conventionally use repeater as relaying, downstream signal to base station and the upward signal of mobile terminal amplify and forward, and have realized the extension to base station functions with the cost lower than base station, make the covering of mobile communication signal further perfect.At present, this system that realizes the extension to base station functions by repeater mainly comprises: micro-wave extension system, optical fiber zooming system, netting twine far-drawing system, coaxial line far-drawing system etc.
Micro-wave extension system, by micro-wave extension repeater, using microwave as transmission medium, has more excellent communication reliability and wiring networking efficiency than other far-drawing systems, and concrete micro-wave extension system configuration as shown in Figure 1.
Fig. 1 is micro-wave extension system configuration schematic diagram of the prior art, and this micro-wave extension system is mainly made up of inserting of microwave unit (MAU), micro-wave extension unit (MRU), the microwave modem module (M & DU) 1 being connected with MAU, the microwave transmission unit (MTU) 1 being connected with M & DU1, the M & DU2 being connected with MRU, the MTU2 that is connected with M & DU2.
MAU converts intermediate-freuqncy signal to for the radiofrequency signal that base transceiver station (Base Transceiver Station, BTS) is sent, and sends to M & DU1; M & DU1 is used for converting the intermediate-freuqncy signal receiving to microwave signal, and sends to MTU2 by MTU1.Or M & DU1, for receive the microwave signal that MTU2 sends by MTU1, converts the microwave signal receiving intermediate-freuqncy signal to and sends to MAU; MAU is for converting the intermediate-freuqncy signal receiving radiofrequency signal to and send to BTS.
M & DU2, for receive the microwave signal that MTU1 sends by MTU2, converts the microwave signal receiving to intermediate-freuqncy signal, and sends to MRU; MRU is for converting the intermediate-freuqncy signal receiving radiofrequency signal to and send to terminal.Or MRU converts intermediate-freuqncy signal to and sends to M & DU2 for the radiofrequency signal that terminal is sent; M & DU2 is used for converting the intermediate-freuqncy signal receiving to microwave signal, and sends to MTU1 by MTU2.
Wherein, MAU comprises: intermediate frequency unit (IFU) 1, feed combiner unit (FE & CU) 1, power subsystem (PSU) 1, control unit (MCU) 1.In MAU, the function of each unit is as follows:
IFU1, converts intermediate-freuqncy signal to for the radiofrequency signal that BTS is sent, and sends to FE & CU1, or the intermediate-freuqncy signal that FE & CU1 is sent converts radiofrequency signal to and sends to BTS;
FE & CU1, for the intermediate-freuqncy signal that IFU1 is sent, and MCU1 closes road to the control signal of M & DU 1, M & DU1 is powered, or, receive the intermediate-freuqncy signal that M & DU1 sends, and send to IFU1;
PSU1, for the each unit power supply to MAU;
MCU1, monitors for the each unit to MAU.
MRU comprises: FE & CU2, IFU2, MCU2, PSU2.In MRU, the function of each unit is as follows:
FE & CU2, the intermediate-freuqncy signal sending for receiving M & DU2, and send to IFU2, or, the intermediate-freuqncy signal that IFU 2 is sent, and MCU2 closes road to the control signal of M & DU2, and M & DU2 is powered;
IFU2, converts radiofrequency signal to for the intermediate-freuqncy signal that FE & CU 2 is sent and sends to terminal, or the radiofrequency signal that terminal is sent converts intermediate-freuqncy signal to, and sends to FE & CU 2;
MCU2, monitors for the each unit to MRU;
PSU2, for the each unit power supply to MRU.
In the time that BTS sends downstream signal by micro-wave extension system as shown in Figure 1 to terminal, the radiofrequency signal that BTS sends first can be through the processing of MAU, convert radiofrequency signal to intermediate-freuqncy signal, after converting intermediate-freuqncy signal to microwave signal by M & DU1 again, send to MTU2 by MTU1, M & DU2 converts microwave signal to convert intermediate-freuqncy signal to radiofrequency signal by MRU after intermediate-freuqncy signal and send to terminal to.
But, due to MAU and not homology of M & DU1, intermediate-freuqncy signal is converted in the process of microwave signal at M & DU1, in fact the microwave signal of conversion will certainly produce frequency departure with the microwave signal that need to convert to, and also the microwave signal of conversion exists frequency deviation.Same, when M & DU2 converts microwave signal to intermediate-freuqncy signal, also there is frequency deviation with the intermediate-freuqncy signal that need to convert in the intermediate-freuqncy signal of conversion in fact.And in actual applications, the microwave signal itself that M & DU2 receives is exactly the microwave signal that has M & DU1 frequency deviation, process self is processed the frequency deviation that can produce again M & DU2 self while being converted to intermediate-freuqncy signal again, and this will cause the decline of signal transmission quality.
Accordingly, in the time that terminal sends upward signal by micro-wave extension system as shown in Figure 1 to BTS, its process is equivalent to BTS and passes through the inverse process of this micro-wave extension system to terminal transmission downstream signal, also there is frequency deviation in the microwave signal that M & DU2 and MAU process respectively in this process and intermediate-freuqncy signal, also can cause the decline of signal transmission quality.
Summary of the invention
The embodiment of the present invention provides a kind of method for transmitting signals and device, when solving in prior art by micro-wave extension system signal transmission, and the problem that exists frequency deviation to cause signal transmission quality to decline due to microwave signal and the intermediate-freuqncy signal of conversion.
A kind of method for transmitting signals that the embodiment of the present invention provides, comprising:
Receive the intermediate-freuqncy signal of the microwave modem module transmission connecting, described intermediate-freuqncy signal comprises: need to be converted to radiofrequency signal and have the intermediate frequency main signal of frequency deviation, and compare the intermediate frequency pilot signal with identical frequency deviation with the pilot carrier frequency of setting, wherein, described intermediate-freuqncy signal is by described microwave modem module, the microwave signal that comprises microwave main signal and microwave pilot signal receiving to be carried out to intermediate frequency conversion process to obtain;
The described intermediate frequency main signal receiving and described intermediate frequency pilot signal are carried out to Frequency mixing processing, obtain the intermediate-freuqncy signal after mixing;
Convert the intermediate-freuqncy signal after mixing to radiofrequency signal transmission.
A kind of signal transmitting apparatus that the embodiment of the present invention provides, comprising:
Feed combiner unit, the intermediate-freuqncy signal sending for receiving the microwave modem module of connection, described intermediate-freuqncy signal comprises: need to be converted to radiofrequency signal and have the intermediate frequency main signal of frequency deviation, and compare the intermediate frequency pilot signal with identical frequency deviation with the pilot carrier frequency of setting, wherein, described intermediate-freuqncy signal is by described microwave modem module, the microwave signal that comprises microwave main signal and microwave pilot signal receiving to be carried out to intermediate frequency conversion process to obtain;
Frequency deviation is eliminated unit, for the described intermediate frequency main signal receiving and described intermediate frequency pilot signal are carried out to Frequency mixing processing, obtains the intermediate-freuqncy signal after mixing;
Intermediate frequency unit, for converting the intermediate-freuqncy signal after mixing to radiofrequency signal transmission.
A kind of inserting of microwave unit that the embodiment of the present invention provides, comprises signal transmitting apparatus as above.
A kind of micro-wave extension unit that the embodiment of the present invention provides, comprises signal transmitting apparatus as above.
A kind of micro-wave extension system that the embodiment of the present invention provides, comprises inserting of microwave as above unit, and micro-wave extension as above unit.
The embodiment of the present invention provides a kind of method for transmitting signals and device, the method receives the intermediate-freuqncy signal that comprises intermediate frequency main signal and intermediate frequency pilot signal, the intermediate frequency main signal receiving and intermediate frequency pilot signal are carried out to mixing and obtain the intermediate-freuqncy signal after mixing, convert the intermediate-freuqncy signal after mixing to radiofrequency signal transmission.Due to the frequency deviation having compared with the pilot carrier frequency of the intermediate frequency pilot signal receiving and setting, the frequency deviation having with intermediate frequency main signal is identical, therefore carry out Frequency mixing processing and just can eliminate two frequency deviations in signal thering is the intermediate frequency pilot signal of identical frequency deviation and intermediate frequency main signal, make in the intermediate-freuqncy signal after Frequency mixing processing without frequency deviation component, convert again the intermediate-freuqncy signal without frequency deviation to radio signal transmission, improved the transmission quality of signal.
Brief description of the drawings
Fig. 1 is micro-wave extension system configuration schematic diagram of the prior art;
The signals transmission that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 processes intermediate frequency pilot signal for the preset phase-locked loop that passes through that the embodiment of the present invention provides, and the schematic diagram that signal after treatment and intermediate frequency main signal are carried out to mixing;
Fig. 4 processes intermediate frequency pilot signal for the phase-locked loop that passing through of providing of the embodiment of the present invention increased the first frequency divider and the second frequency divider, and the schematic diagram that signal after treatment and intermediate frequency main signal are carried out to mixing;
The signal transmitting apparatus structural representation that Fig. 5 provides for the embodiment of the present invention;
The micro-wave extension system configuration schematic diagram that Fig. 6 provides for the embodiment of the present invention.
Embodiment
No matter be for the M & DU1 shown in Fig. 1 or M & is DU2, intermediate-freuqncy signal is being converted to microwave signal, and while converting microwave signal to intermediate-freuqncy signal, there is certain frequency deviation compared with the frequency range that in fact frequency range after conversion converts to needs.And with regard to the micro-wave extension system shown in Fig. 1, while changing multiple signal, the frequency deviation that produces is but changeless, the frequency deviation for example, producing when M & DU1 converts a microwave signal to intermediate-freuqncy signal, the frequency deviation producing while converting another microwave signal to intermediate-freuqncy signal with this M & DU1 is identical.
The embodiment of the present invention is in order to eliminate frequency deviation, improve signal transmission quality, make an appointment one the intermediate frequency pilot signal of the pilot carrier frequency F2 with setting of MAU and MRU, and determine and the frequency of the microwave pilot signal that this pilot carrier frequency is F2 in theory intermediate frequency pilot signal converts to be designated as F2'.When the radio frequency main signal that need to be converted to microwave when the one end in MAU and MRU is converted to microwave main signal and is sent to the other end by M & DU1 or M & DU2, first this radio frequency main signal is converted to intermediate frequency main signal, then the intermediate frequency pilot signal that is simultaneously F2 by this intermediate frequency main signal and frequency by M & DU1 or M & DU2 is converted to microwave main signal and microwave pilot signal sends to the other end.Now, the microwave main signal being converted to by this intermediate frequency main signal has just had frequency deviation, the frequency of the microwave pilot signal that the intermediate frequency pilot signal that is F2 by frequency converts to is not the pilot carrier frequency F2' setting, but also there is the microwave pilot signal of frequency deviation compared with the pilot carrier frequency F2' setting, and these two frequency deviations equate.The M & DU of the other end receives after these two the microwave main signals and microwave pilot signal with identical frequency deviation, can carry out again intermediate frequency conversion process, while being converted to intermediate frequency, can on the basis of original frequency deviation, again produce again frequency deviation, and the frequency deviation again producing equates, thereby these two signals are carried out the frequency deviation that the intermediate frequency main signal that obtains after intermediate frequency conversion and intermediate frequency pilot signal have by the other end still to be equated, therefore, the intermediate frequency main signal of carrying out obtaining after intermediate frequency conversion process and intermediate frequency pilot signal are carried out Frequency mixing processing by the other end, just can eliminate all frequency deviations that these two signals have, be converted to radio signal transmission by having eliminated frequency deviation intermediate-freuqncy signal afterwards, just can improve the transmission quality of signal.
Below in conjunction with Figure of description, send upward signal as example by micro-wave extension system as shown in Figure 1 to BTS taking terminal, the embodiment of the present invention is described in detail.
Fig. 2 is the signals transmission that the embodiment of the present invention provides, and specifically comprises the following steps:
S201: the M & DU1 being connected with MAU receives the microwave signal of the M & DU2 transmission being connected with MRU, this microwave signal comprises: need to be converted to radiofrequency signal and have the microwave main signal of frequency deviation, and compare the microwave pilot signal with identical frequency deviation with the frequency F2' that in theory the intermediate frequency pilot signal of pilot carrier frequency F2 with this setting is converted to microwave pilot signal.
In embodiments of the present invention, make an appointment one the intermediate frequency pilot signal of the pilot carrier frequency with setting of MAU and MRU, the pilot carrier frequency of this setting is designated as F2, and the frequency of determining the microwave pilot signal that this pilot carrier frequency is F2 in theory intermediate frequency pilot signal converts to is not (if produce frequency deviation while changing, the frequency of the microwave pilot signal that the intermediate frequency pilot signal that is F2 by pilot carrier frequency converts to), be designated as F2 '.
The upward signal that MRU receiving terminal sends, this upward signal is radio frequency main signal, and the radio frequency main signal receiving is converted to intermediate frequency main signal, and the frequency of the intermediate frequency main signal of conversion is designated as to F1.The intermediate frequency pilot signal of the pilot carrier frequency F2 with this setting of the intermediate frequency main signal that MRU is F1 by frequency and agreement sends to M & DU2, this intermediate frequency main signal is converted to microwave main signal by M & DU2, meanwhile, the intermediate frequency pilot signal that is F2 by frequency is converted to microwave pilot signal.Because M & DU2 is in the time carrying out intermediate-freuqncy signal to be converted to the microwave conversion process of microwave signal, the signal of conversion can produce frequency deviation, the frequency of supposing the microwave main signal that the intermediate frequency main signal that need to be F1 by frequency converts to is F1 ', the frequency deviation of generation is designated as to Δ f, and the frequency of the microwave main signal that actual converted becomes is F1 '+Δ f.The frequency deviation producing while carrying out microwave conversion due to M & DU2 is equal, and the frequency of the microwave pilot signal that the intermediate frequency pilot signal that therefore reality is F2 by frequency converts to is not F2' yet, but F2'+ Δ f.Also, microwave main signal and the microwave pilot signal of M & DU2 conversion have identical frequency deviation.M & DU2 is the microwave main signal into F1 '+Δ f by the frequency of changing, and frequency is that the microwave pilot signal of F2'+ Δ f sends to M & DU1.
Therefore the microwave signal that, M & DU1 receives comprises microwave main signal and the microwave pilot signal with identical frequency deviation.
S202:M & DU1 carries out intermediate frequency conversion process to the microwave signal receiving, convert the microwave main signal in this microwave signal to intermediate frequency main signal, convert the microwave pilot signal in this microwave signal to intermediate frequency pilot signal, will comprise that this intermediate frequency main signal of conversion and the intermediate-freuqncy signal of intermediate frequency pilot signal send to MAU.
In embodiments of the present invention, the microwave main signal and the microwave pilot signal that receive due to M & DU1 have identical frequency deviation, and M & DU1 also equates in the frequency deviation of carrying out producing while converting microwave signal the intermediate frequency conversion process of intermediate-freuqncy signal to, therefore supposing that the frequency deviation that M & DU2 is carried out to produce when frequency deviation that microwave when conversion produces and M & DU1 carry out intermediate frequency conversion merges is designated as Δ F, the frequency of the intermediate frequency main signal that the microwave main signal that M & DU1 is F1'+ Δ f by frequency converts to is F1+ Δ F, the frequency of the intermediate frequency pilot signal that the microwave pilot signal that is F2'+ Δ f by frequency converts to is F2+ Δ F.
Visible, the frequency being converted to by MRU is that the intermediate frequency main signal of F1 is changed through the intermediate frequency of microwave conversion, transmission and the M & DU1 of M & DU2, the frequency of the intermediate frequency main signal again reverting to is F1+ Δ F, the frequency deviation producing is Δ F, the frequency being produced by MRU is that the intermediate frequency pilot signal of F2 is changed through the intermediate frequency of microwave conversion, transmission and the M & DU1 of M & DU2, the frequency of the intermediate frequency pilot signal again reverting to is F2+ Δ F, and the frequency deviation of generation is also Δ F.
The intermediate frequency main signal receiving and intermediate frequency pilot signal are carried out Frequency mixing processing by S203:MAU, obtains the intermediate-freuqncy signal after mixing.
In embodiments of the present invention, because the intermediate frequency main signal of M & DU1 after intermediate frequency conversion process and the frequency of intermediate frequency pilot signal are respectively F1+ Δ F and F2+ Δ F, two signals have identical frequency deviation, therefore MAU is undertaken these two signals after Frequency mixing processing by frequency mixer, and the frequency of the intermediate-freuqncy signal after the mixing obtaining is: | (F1+ Δ F)-(F2+ Δ F) |=| F1-F2|.Visible, in the intermediate-freuqncy signal after the mixing obtaining without the frequency deviation component of Δ F.
S204: convert the intermediate-freuqncy signal after mixing to radiofrequency signal transmission.
Because the intermediate-freuqncy signal after mixing is without frequency deviation, and the frequency F2 of intermediate frequency pilot signal is wherein that MAU and MRU are predefined, also be that F2 is known, therefore MAU by the frequency obtaining is | the intermediate-freuqncy signal of F1-F2| is carried out radio frequency conversion process, converts the radiofrequency signal needing to and sends to BTS.
In said process, the frequency deviation that the microwave pilot signal receiving due to M & DU1 has compared with the microwave pilot signal in theory the intermediate frequency pilot signal of pilot carrier frequency with setting being converted to, the frequency deviation having with microwave main signal is identical, thereby the intermediate frequency pilot signal obtaining after intermediate frequency conversion process also has identical frequency deviation with intermediate frequency main signal, therefore intermediate frequency pilot signal and the intermediate frequency main signal with identical frequency deviation are carried out Frequency mixing processing by MAU, just can eliminate two frequency deviations in signal, make in the intermediate-freuqncy signal after Frequency mixing processing without frequency deviation component, convert again the intermediate-freuqncy signal without frequency deviation component to radio signal transmission, improve the transmission quality of signal.
And the signals transmission shown in Fig. 2 describes to BTS transmission upward signal as example by micro-wave extension system taking terminal.In the time that BTS sends downstream signal by micro-wave extension system to terminal, to be sent microwave main signal and the microwave pilot signal with identical frequency deviation to the M & DU2 connected with MRU by M & DU1 by MAU, by M & DU2, this microwave main signal and microwave pilot signal are carried out to intermediate frequency conversion process, obtain intermediate frequency main signal and intermediate frequency pilot signal and send to MRU, intermediate frequency main signal and intermediate frequency pilot signal are carried out Frequency mixing processing by MRU, convert the intermediate-freuqncy signal after Frequency mixing processing to radiofrequency signal, and send to terminal.Signals transmission when terminal shown in this process and Fig. 2 sends from upward signal to BTS is basic identical, just repeats no longer one by one here.
In the process of transmitting due to microwave pilot signal, can produce larger phase noise between M & DU1 and M & DU2, if therefore MAU or MRU are directly by the intermediate frequency pilot signal receiving and the mixing of intermediate frequency main signal, although can eliminate frequency deviation wherein, but also can make phase noise increase, reduce signal quality.Therefore, in the embodiment of the present invention in order further to improve the quality of signal transmission, before intermediate frequency main signal and intermediate frequency pilot signal are carried out to Frequency mixing processing, need to re-construct a phase noise lower, and there is the signal of the frequency deviation identical with intermediate frequency pilot signal with intermediate frequency main signal, adopt this signal of structure to replace intermediate frequency pilot signal and intermediate frequency main signal to carry out Frequency mixing processing, to reduce phase noise.Concrete, can, by the phase-locked loop that comprises phase discriminator and voltage controlled oscillator arranging, the intermediate frequency pilot signal receiving be processed, again obtain carrying out with intermediate frequency main signal the intermediate frequency pilot signal of Frequency mixing processing, as shown in Figure 3.
Fig. 3 processes intermediate frequency pilot signal for the preset phase-locked loop that passes through that the embodiment of the present invention provides, and the schematic diagram that signal after treatment and intermediate frequency main signal are carried out to mixing.In Fig. 3, phase-locked loop is made up of phase discriminator and voltage controlled oscillator.Wherein:
Voltage controlled oscillator is for receiving the regulation voltage of phase discriminator output, and the frequency of the conditioning signal of self being exported according to this regulation voltage regulates;
Phase discriminator is for comparing the frequency of feedback signal and reference signal, according to comparative result output regulation voltage, the frequency of the conditioning signal of exporting with adjusting voltage controlled oscillator, wherein, the conditioning signal that feedback signal is exported by voltage controlled oscillator and intermediate frequency pilot signal are carried out mixing and are obtained.
Because phase noise in the conditioning signal of voltage controlled oscillator output is lower, therefore only need to be in the time of stabilized, make the conditioning signal of voltage controlled oscillator output there is the frequency deviation identical with intermediate frequency pilot signal with intermediate frequency main signal, can using the conditioning signal of voltage controlled oscillator output again as will with the intermediate frequency pilot signal of intermediate frequency main signal mixing.
In embodiments of the present invention, in the time of stabilized, also, in the time that phase discriminator locks, need the conditioning signal of voltage controlled oscillator output to there is identical frequency deviation with intermediate frequency main signal and intermediate frequency pilot signal.The frequency of the conditioning signal of voltage controlled oscillator output can preset, the frequency of follow-up this conditioning signal can be on the basis of the frequency of predefined conditioning signal, regulate according to the regulation voltage of phase discriminator output, the frequency of the conditioning signal of setting is designated as to F3.
Reference frequency with reference to signal is designated as Fref, because feedback signal is obtained by conditioning signal and the mixing of intermediate frequency pilot signal, the absolute value of the difference of the frequency that therefore frequency of feedback signal is conditioning signal and the frequency of intermediate frequency pilot signal, is | (F3)-(F2+ Δ F) |.The frequency that is two signals of input due to the condition of phase discriminator locking equates, also be that the frequency of feedback signal and the reference frequency of reference signal equate, in the time that the frequency of two signals equates, phase discriminator no longer regulates the frequency of the conditioning signal of voltage controlled oscillator output, whole stabilized, therefore in the embodiment of the present invention in the time of preset phase-locked loop, the reference frequency Fref of the reference signal of setting, the frequency F3 of the conditioning signal of voltage controlled oscillator output, with the frequency F2(of intermediate frequency pilot signal of pilot carrier frequency with setting also without the frequency of the intermediate frequency pilot signal of frequency deviation), meet following relation: | F3-F2|=Fref.
Set according to the method described above after the reference frequency and regulating frequency of reference signal, the intermediate frequency pilot signal receiving is processed, again the process that obtains carrying out the intermediate frequency pilot signal of Frequency mixing processing with intermediate frequency main signal is specially: the conditioning signal F3 of the intermediate frequency pilot signal F2+ Δ F receiving and voltage controlled oscillator output is carried out to Frequency mixing processing, obtain feedback signal | (F3)-(F2+ Δ F) |; By the feedback signal obtaining, and reference signal Fref input phase discriminator, the regulation voltage that phase discriminator is exported obtained; By the regulation voltage input voltage controlled oscillator obtaining, regulate the frequency of the conditioning signal of voltage controlled oscillator output, the frequency of the conditioning signal of the voltage controlled oscillator output after adjusting is designated as F3+ Δ f1; Conditioning signal and this intermediate frequency pilot signal F2+ Δ F after regulating are re-started to mixing, again obtain feedback signal | (F3+ Δ f1)-(F2+ Δ F) |, and the feedback signal again obtaining and reference signal are continued to input phase discriminator, to continue the frequency of the conditioning signal that regulates voltage controlled oscillator output, until phase discriminator locking.
Due to the reference frequency Fref setting, the frequency F3 of the conditioning signal of voltage controlled oscillator output, meet with the frequency F2 of the intermediate frequency pilot signal without frequency deviation | F3-F2|=Fref, and only have the frequency when feedback signal | (F3+ Δ f1)-(F2+ Δ F) | while equating with the frequency Fref of reference signal, phase discriminator could lock, therefore only have and work as | (F3+ Δ f1)-(F2+ Δ F) |=| F3-F2|, also while being Δ f1=Δ F, phase discriminator could lock, the frequency F3+ Δ f1=F3+ Δ F of the conditioning signal of now voltage controlled oscillator output, visible, the frequency deviation of the frequency F3 of the frequency of conditioning signal now and the conditioning signal of setting is also Δ F, there is identical frequency deviation with intermediate frequency pilot signal F2+ Δ F and intermediate frequency main signal F1+ Δ F, and phase noise is lower.
Therefore, in the embodiment of the present invention in the time that phase discriminator locks, the conditioning signal that voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with intermediate frequency main signal Frequency mixing processing obtaining, also carry out mixing by conditioning signal F3+ Δ F and intermediate frequency main signal F1+ Δ F, obtain the intermediate-freuqncy signal after mixing | F1-F3|, because F3 is the artificial given frequency of setting, therefore can be directly by the intermediate-freuqncy signal after mixing | F1-F3| carries out radio frequency conversion process, is converted to the radiofrequency signal needing and transmits.
Consider in actual applications, the also frequency F3 of the inconvenient conditioning signal of directly exporting with reference to the voltage controlled oscillator of frequency Fref, setting, be set as meeting with the frequency F2 of the intermediate frequency pilot signal without frequency deviation | F3-F2|=Fref, therefore, in the embodiment of the present invention, can in the phase-locked loop based on Fig. 3, increase the first frequency divider and the second frequency divider, as shown in Figure 4.
Fig. 4 processes intermediate frequency pilot signal for the phase-locked loop that passing through of providing of the embodiment of the present invention increased the first frequency divider and the second frequency divider, and the schematic diagram that signal after treatment and intermediate frequency main signal are carried out to mixing.In Fig. 4, the first frequency divider is for carrying out frequency division processing to feedback signal, and by feedback signal input phase discriminator after treatment frequency division, also be, the business of the frequency that the frequency of the signal of the first frequency divider input phase discriminator is feedback signal and the frequency division parameter of the first frequency divider, the frequency division parameter of the first frequency divider is designated as R; The second frequency divider is for carrying out frequency division processing to reference signal, and by reference signal input phase discriminator after treatment frequency division, also be, the business of the reference frequency that the frequency of the signal of the second frequency divider input phase discriminator is reference signal and the frequency division parameter of the second frequency divider, the frequency division parameter of the second frequency divider is designated as N.
When employing phase-locked loop is as shown in Figure 4 processed intermediate frequency pilot signal, frequency F3, the frequency division parameter R of the first frequency divider, the frequency division parameter N of the second frequency divider of the conditioning signal of the reference frequency Fref of the reference signal of setting input the second frequency divider, the voltage controlled oscillator output of setting, meet with the frequency F2 of the intermediate frequency pilot signal without frequency deviation:
Set according to the method described above after the frequency division parameter of frequency division parameter, the second frequency divider of frequency, first frequency divider of reference frequency, the conditioning signal of reference signal, the intermediate frequency pilot signal receiving is processed, again the process that obtains carrying out the intermediate frequency pilot signal of Frequency mixing processing with intermediate frequency main signal is specially: the conditioning signal F3 of the intermediate frequency pilot signal F2+ Δ F receiving and voltage controlled oscillator output is carried out to Frequency mixing processing, obtain feedback signal | (F3)-(F2+ Δ F) |; The feedback signal obtaining is inputted to the first frequency divider, obtain frequency division feedback signal after treatment
the reference signal with this reference frequency Fref is inputted to the second frequency divider, obtain frequency division reference signal after treatment
by the feedback signal after treatment frequency division obtaining
and frequency division reference signal after treatment
input phase discriminator, obtains the regulation voltage that phase discriminator is exported; By the regulation voltage input voltage controlled oscillator obtaining, regulate the frequency of the conditioning signal of voltage controlled oscillator output, the frequency of the conditioning signal after adjusting is designated as F3+ Δ f1; Conditioning signal and intermediate frequency pilot signal F2+ Δ F after regulating are re-started to mixing, again obtain feedback signal | (F3+ Δ f1)-(F2+ Δ F) |, and the feedback signal again obtaining is inputted to the first frequency divider, again obtain frequency division feedback signal after treatment
again the feedback signal after treatment frequency division obtaining and frequency division reference signal after treatment are continued to input phase discriminator, to continue the frequency of the conditioning signal that regulates voltage controlled oscillator output, until phase discriminator locking.
Due to frequency F3, the frequency division parameter R of the first frequency divider, the frequency division parameter N of the second frequency divider of the conditioning signal of the voltage controlled oscillator output of reference frequency Fref, the setting set, meet with the frequency F2 of the intermediate frequency pilot signal without frequency deviation
and only has the frequency when frequency division feedback signal after treatment
frequency with frequency division reference signal after treatment
while equating, phase discriminator could lock, and therefore only has and works as
also while being Δ f1=Δ F, phase discriminator could lock, the frequency F3+ Δ f1=F3+ Δ F of the conditioning signal of now voltage controlled oscillator output, visible, the frequency deviation of the frequency F3 of the frequency of conditioning signal now and the conditioning signal of setting is also Δ F, there is identical frequency deviation with intermediate frequency pilot signal F2+ Δ F and intermediate frequency main signal F1+ Δ F, and phase noise is lower.
Therefore, in the embodiment of the present invention in the time that phase discriminator locks, the conditioning signal that voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with intermediate frequency main signal Frequency mixing processing obtaining, also carry out mixing by conditioning signal F3+ Δ F and intermediate frequency main signal F1+ Δ F, obtain the intermediate-freuqncy signal after mixing | F1-F3|, because F3 is the artificial given frequency of setting, therefore can be directly by the intermediate-freuqncy signal after mixing | F1-F3| carries out radio frequency conversion process, is converted to the radiofrequency signal needing and transmits.
Certainly, in order to make the conditioning signal that in phase-locked loop, phase discriminator can regulate voltage controlled oscillator to export more accurately, between phase discriminator and voltage controlled oscillator, can also increase loop filter, just repeat no longer one by one here.
Fig. 5 is the signal transmitting apparatus structural representation that the embodiment of the present invention provides, and specifically comprises:
Frequency deviation is eliminated unit 502, for the described intermediate frequency main signal receiving and described intermediate frequency pilot signal are carried out to Frequency mixing processing, obtains the intermediate-freuqncy signal after mixing;
Described device also comprises:
Intermediate frequency pilot signal processing unit 504, for the described intermediate frequency pilot signal receiving being processed by the phase-locked loop arranging, wherein, the phase-locked loop of setting comprises phase discriminator and voltage controlled oscillator.
Described intermediate frequency pilot signal processing unit 504 specifically for, the conditioning signal of the described intermediate frequency pilot signal receiving and described voltage controlled oscillator output is carried out to Frequency mixing processing, obtain feedback signal; By the described feedback signal obtaining, and the reference signal with the reference frequency of setting inputs described phase discriminator, obtains the regulation voltage of described phase discriminator output; The described regulation voltage obtaining is inputted to described voltage controlled oscillator, regulate the frequency of the conditioning signal of described voltage controlled oscillator output; Conditioning signal and described intermediate frequency pilot signal after regulating are re-started to mixing, again obtain feedback signal, and the feedback signal again obtaining and described reference signal are continued to the described phase discriminator of input, continue the frequency of the conditioning signal that regulates described voltage controlled oscillator output, until the locking of described phase discriminator; In the time of described phase discriminator locking, the conditioning signal that described voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with described intermediate frequency main signal Frequency mixing processing obtaining; Wherein, the frequency F3 of the conditioning signal of the reference frequency Fref of the reference signal of the described phase discriminator of input of setting, described voltage controlled oscillator output, and the frequency F2 with the intermediate frequency pilot signal of the pilot carrier frequency of described setting meets: | F3-F2|=Fref.
Described device also comprises:
Intermediate frequency pilot signal processing unit 504, for the described intermediate frequency pilot signal receiving being processed by the phase-locked loop arranging, wherein, the phase-locked loop of setting comprises the first frequency divider, the second frequency divider, phase discriminator and voltage controlled oscillator.
Described intermediate frequency pilot signal processing unit 504 specifically for, the conditioning signal of the described intermediate frequency pilot signal receiving and described voltage controlled oscillator output is carried out to Frequency mixing processing, obtain feedback signal; The feedback signal obtaining is inputted to described the first frequency divider, obtain frequency division feedback signal after treatment, the reference signal of the reference frequency with setting is inputted to described the second frequency divider, obtain frequency division reference signal after treatment; By the feedback signal after treatment frequency division obtaining and frequency division reference signal input after treatment phase discriminator, obtain the regulation voltage of described phase discriminator output; The described regulation voltage obtaining is inputted to described voltage controlled oscillator, regulate the frequency of the conditioning signal of described voltage controlled oscillator output; Conditioning signal and described intermediate frequency pilot signal after regulating are re-started to mixing, again obtain feedback signal, and the feedback signal again obtaining is inputted to described the first frequency divider, again obtain frequency division feedback signal after treatment, again the feedback signal after treatment frequency division obtaining and frequency division reference signal after treatment are continued to the described phase discriminator of input, continue the frequency of the conditioning signal that regulates described voltage controlled oscillator output, until the locking of described phase discriminator; In the time of described phase discriminator locking, the conditioning signal that described voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with described intermediate frequency main signal Frequency mixing processing obtaining; Wherein, frequency F3, the frequency division parameter R of described the first frequency divider, the frequency division parameter N of described the second frequency divider of the conditioning signal of reference frequency Fref, the described voltage controlled oscillator output of the reference signal of described the second frequency divider of input of setting, and the frequency F2 with the intermediate frequency pilot signal of the pilot carrier frequency of described setting meets:
The device of above-mentioned signal transmission can be arranged in MAU or MRU, also can be arranged in the IFU of MAU or MRU, for example, be arranged in IFU1 and IFU2 as shown in Figure 1.
The micro-wave extension system configuration schematic diagram that Fig. 6 provides for the embodiment of the present invention, as shown in Figure 6, this micro-wave extension system is mainly made up of inserting of microwave unit (MAU), micro-wave extension unit (MRU), the microwave modem module (M & DU) 1 being connected with MAU, the microwave transmission unit (MTU) 1 being connected with M & DU1, the M & DU2 being connected with MRU, the MTU2 that is connected with M & DU2.MAU is except comprising intermediate frequency unit (IFU) 1 as shown in Figure 1, feed combiner unit (FE & CU) 1, power subsystem (PSU) 1, control unit (MCU) 1, also comprise intermediate frequency pilot signal processing unit 1 and frequency deviation elimination unit 1, for eliminating the frequency deviation producing when microwave signal MRU being sent as M & DU1 converts intermediate-freuqncy signal to.Accordingly, MRU is except comprising intermediate frequency unit (IFU) 2 as shown in Figure 1, feed combiner unit (FE & CU) 2, power subsystem (PSU) 2, control unit (MCU) 2, also comprise intermediate frequency pilot signal processing unit 2 and frequency deviation elimination unit 2, for eliminating the frequency deviation producing when microwave signal MAU being sent as M & DU2 converts intermediate-freuqncy signal to.Wherein, between M & DU1 and M & DU2, in the time of transmission microwave main signal, also transmit microwave pilot signal, this microwave main signal and microwave pilot signal have identical frequency deviation.
In the time that terminal sends upward signal by micro-wave extension system as shown in Figure 6 to BTS, the radio frequency main signal that in MRU, IFU2 receiving terminal sends, convert radio frequency main signal to intermediate frequency main signal, and produce intermediate frequency pilot signal, intermediate frequency main signal and intermediate frequency pilot signal are sent to M & DU2 by FE & CU2, M & DU2 converts intermediate frequency main signal to microwave main signal, convert intermediate frequency pilot signal to microwave pilot signal, this microwave main signal and microwave pilot signal have identical frequency deviation.Microwave main signal and microwave pilot signal are passed through MTU2 by M & DU2, MTU1 sends to M & DU1, M & DU1 converts microwave main signal and microwave pilot signal to intermediate frequency main signal and intermediate frequency pilot signal, and send to intermediate frequency pilot signal processing unit 1 by the FE & CU1 in MAU, intermediate frequency pilot signal processing unit 1 is processed intermediate frequency pilot signal, again obtain intermediate frequency pilot signal, and eliminate unit 1 by frequency deviation the intermediate frequency pilot signal again obtaining and intermediate frequency main signal are carried out to Frequency mixing processing, eliminate frequency deviation, send to IFU1 by having eliminated the intermediate-freuqncy signal after frequency deviation, IFU1 converts intermediate-freuqncy signal to radiofrequency signal and sends to BTS, the transmission of settling signal.
In the time that BTS sends downstream signal by micro-wave extension system as shown in Figure 6 to terminal, the radio frequency main signal that BTS sends first can be through the processing of MAU, convert radio frequency main signal to intermediate frequency main signal, simultaneously by intermediate frequency pilot signal with intermediate frequency main signal sends to M & DU1 to convert microwave pilot signal to and microwave main signal sends to M & DU2, , by M & DU2, this microwave main signal and microwave pilot signal are converted to intermediate frequency main signal and intermediate frequency pilot signal and send to MRU, and eliminate unit 2 and eliminate the frequency deviation of intermediate frequency main signal and intermediate frequency pilot signal by the intermediate frequency pilot signal processing unit 2 in MRU and frequency deviation, convert radiofrequency signal to and send to terminal having eliminated the intermediate-freuqncy signal after frequency deviation, the process that this process and terminal send upward signal to BTS is basic identical, here just repeat no longer one by one.
The embodiment of the present invention provides a kind of method for transmitting signals and device, the method receives the intermediate-freuqncy signal that comprises intermediate frequency main signal and intermediate frequency pilot signal, the intermediate frequency main signal receiving and intermediate frequency pilot signal are carried out to mixing and obtain the intermediate-freuqncy signal after mixing, convert the intermediate-freuqncy signal after mixing to radiofrequency signal transmission.Due to the frequency deviation having compared with the pilot carrier frequency of the intermediate frequency pilot signal receiving and setting, the frequency deviation having with intermediate frequency main signal is identical, therefore carry out Frequency mixing processing and just can eliminate two frequency deviations in signal thering is the intermediate frequency pilot signal of identical frequency deviation and intermediate frequency main signal, make in the intermediate-freuqncy signal after Frequency mixing processing without frequency deviation component, convert again the intermediate-freuqncy signal without frequency deviation to radio signal transmission, improved the transmission quality of signal.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if these amendments of the present invention and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (13)
1. a method for transmitting signals, is characterized in that, comprising:
Receive the intermediate-freuqncy signal that microwave modem module sends, described intermediate-freuqncy signal comprises: need to be converted to radiofrequency signal and have the intermediate frequency main signal of frequency deviation, and compare the intermediate frequency pilot signal with identical frequency deviation with the pilot carrier frequency of setting, wherein, described intermediate-freuqncy signal is by described microwave modem module, the microwave signal that comprises microwave main signal and microwave pilot signal receiving to be carried out to intermediate frequency conversion process to obtain;
The described intermediate frequency main signal receiving and described intermediate frequency pilot signal are carried out to Frequency mixing processing, obtain the intermediate-freuqncy signal after mixing;
Convert the intermediate-freuqncy signal after mixing to radiofrequency signal transmission.
2. the method for claim 1, is characterized in that, before the described intermediate frequency main signal receiving and described intermediate frequency pilot signal are carried out to Frequency mixing processing, described method also comprises:
Setting comprises the phase-locked loop of phase discriminator and voltage controlled oscillator, and uses the phase-locked loop arranging to process the described intermediate frequency pilot signal receiving.
3. method as claimed in claim 2, is characterized in that, the phase-locked loop that comprises phase discriminator and voltage controlled oscillator is set, and specifically comprises:
Set the reference frequency Fref of the reference signal of the described phase discriminator of input, and the frequency F3 of the conditioning signal of described voltage controlled oscillator output;
Wherein, have the frequency F2 of the intermediate frequency pilot signal of the pilot carrier frequency of described setting, described reference frequency Fref, described conditioning signal frequency F3 meet: | F3-F2|=Fref;
The described intermediate frequency pilot signal receiving is processed, is specifically comprised:
The conditioning signal of the described intermediate frequency pilot signal receiving and the output of described voltage controlled oscillator is carried out to Frequency mixing processing, obtain feedback signal;
By the described feedback signal obtaining, and the reference signal with described reference frequency inputs described phase discriminator, obtains the regulation voltage of described phase discriminator output;
The described regulation voltage obtaining is inputted to described voltage controlled oscillator, regulate the frequency of the conditioning signal of described voltage controlled oscillator output;
Conditioning signal and described intermediate frequency pilot signal after regulating are re-started to mixing, again obtain feedback signal, and the feedback signal again obtaining and described reference signal are continued to the described phase discriminator of input, continue the frequency of the conditioning signal that regulates described voltage controlled oscillator output, until the locking of described phase discriminator;
In the time of described phase discriminator locking, the conditioning signal that described voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with described intermediate frequency main signal Frequency mixing processing obtaining.
4. the method for claim 1, is characterized in that, before the described intermediate frequency main signal receiving and described intermediate frequency pilot signal are carried out to Frequency mixing processing, described method also comprises:
Setting comprises the phase-locked loop of the first frequency divider, the second frequency divider, phase discriminator and voltage controlled oscillator, uses the phase-locked loop arranging to process the described intermediate frequency pilot signal receiving.
5. method as claimed in claim 4, is characterized in that, the phase-locked loop that comprises the first frequency divider, the second frequency divider, phase discriminator and voltage controlled oscillator is set, and specifically comprises:
Set frequency F3, the frequency division parameter R of the first frequency divider, the frequency division parameter N of the second frequency divider of the conditioning signal of the reference frequency Fref of the reference signal of described the second frequency divider of input, the output of described voltage controlled oscillator;
Wherein, have the frequency division parameter R of the frequency F3 of the frequency F2 of the intermediate frequency pilot signal of the pilot carrier frequency of described setting, described reference frequency Fref, described conditioning signal, described the first frequency divider, described the second frequency divider frequency division parameter N meet:
The described intermediate frequency pilot signal receiving is processed, is specifically comprised:
The conditioning signal of the described intermediate frequency pilot signal receiving and the output of described voltage controlled oscillator is carried out to Frequency mixing processing, obtain feedback signal;
The feedback signal obtaining is inputted to described the first frequency divider, obtain frequency division feedback signal after treatment, the reference signal with described reference frequency is inputted to described the second frequency divider, obtain frequency division reference signal after treatment;
The feedback signal after treatment frequency division obtaining and frequency division reference signal after treatment are inputted to described phase discriminator, obtain the regulation voltage of described phase discriminator output;
The described regulation voltage obtaining is inputted to described voltage controlled oscillator, regulate the frequency of the conditioning signal of described voltage controlled oscillator output;
Conditioning signal and described intermediate frequency pilot signal after regulating are re-started to mixing, again obtain feedback signal, and the feedback signal again obtaining is inputted to described the first frequency divider, again obtain frequency division feedback signal after treatment, again the feedback signal after treatment frequency division obtaining and frequency division reference signal after treatment are continued to the described phase discriminator of input, continue the frequency of the conditioning signal that regulates described voltage controlled oscillator output, until the locking of described phase discriminator;
In the time of described phase discriminator locking, the conditioning signal that described voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with described intermediate frequency main signal Frequency mixing processing obtaining.
6. a signal transmitting apparatus, is characterized in that, comprising:
Feed combiner unit, the intermediate-freuqncy signal sending for receiving microwave modem module, described intermediate-freuqncy signal comprises: need to be converted to radiofrequency signal and have the intermediate frequency main signal of frequency deviation, and compare the intermediate frequency pilot signal with identical frequency deviation with the pilot carrier frequency of setting, wherein, described intermediate-freuqncy signal is by described microwave modem module, the microwave signal that comprises microwave main signal and microwave pilot signal receiving to be carried out to intermediate frequency conversion process to obtain;
Frequency deviation is eliminated unit, for the described intermediate frequency main signal receiving and described intermediate frequency pilot signal are carried out to Frequency mixing processing, obtains the intermediate-freuqncy signal after mixing;
Intermediate frequency unit, for converting the intermediate-freuqncy signal after mixing to radiofrequency signal transmission.
7. device as claimed in claim 6, is characterized in that, described device also comprises:
Intermediate frequency pilot signal processing unit, for the described intermediate frequency pilot signal receiving being processed by the phase-locked loop arranging, wherein, the phase-locked loop of setting comprises phase discriminator and voltage controlled oscillator.
8. device as claimed in claim 7, is characterized in that, described intermediate frequency pilot signal processing unit specifically for, the conditioning signal of the described intermediate frequency pilot signal receiving and described voltage controlled oscillator output is carried out to Frequency mixing processing, obtain feedback signal; By the described feedback signal obtaining, and the reference signal with the reference frequency of setting inputs described phase discriminator, obtains the regulation voltage of described phase discriminator output; The described regulation voltage obtaining is inputted to described voltage controlled oscillator, regulate the frequency of the conditioning signal of described voltage controlled oscillator output; Conditioning signal and described intermediate frequency pilot signal after regulating are re-started to mixing, again obtain feedback signal, and the feedback signal again obtaining and described reference signal are continued to the described phase discriminator of input, continue the frequency of the conditioning signal that regulates described voltage controlled oscillator output, until the locking of described phase discriminator; In the time of described phase discriminator locking, the conditioning signal that described voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with described intermediate frequency main signal Frequency mixing processing obtaining; Wherein, the frequency F3 of the conditioning signal of the reference frequency Fref of the reference signal of the described phase discriminator of input of setting, described voltage controlled oscillator output, and the frequency F2 with the intermediate frequency pilot signal of the pilot carrier frequency of described setting meets: | F3-F2|=Fref.
9. device as claimed in claim 6, is characterized in that, described device also comprises:
Intermediate frequency pilot signal processing unit, for the described intermediate frequency pilot signal receiving being processed by the phase-locked loop arranging, wherein, the phase-locked loop of setting comprises the first frequency divider, the second frequency divider, phase discriminator and voltage controlled oscillator.
10. device as claimed in claim 9, is characterized in that, described intermediate frequency pilot signal processing unit specifically for, the conditioning signal of the described intermediate frequency pilot signal receiving and described voltage controlled oscillator output is carried out to Frequency mixing processing, obtain feedback signal; The feedback signal obtaining is inputted to described the first frequency divider, obtain frequency division feedback signal after treatment, the reference signal of the reference frequency with setting is inputted to described the second frequency divider, obtain frequency division reference signal after treatment; By the feedback signal after treatment frequency division obtaining and frequency division reference signal input after treatment phase discriminator, obtain the regulation voltage of described phase discriminator output; The described regulation voltage obtaining is inputted to described voltage controlled oscillator, regulate the frequency of the conditioning signal of described voltage controlled oscillator output; Conditioning signal and described intermediate frequency pilot signal after regulating are re-started to mixing, again obtain feedback signal, and the feedback signal again obtaining is inputted to described the first frequency divider, again obtain frequency division feedback signal after treatment, again the feedback signal after treatment frequency division obtaining and frequency division reference signal after treatment are continued to the described phase discriminator of input, continue the frequency of the conditioning signal that regulates described voltage controlled oscillator output, until the locking of described phase discriminator; In the time of described phase discriminator locking, the conditioning signal that described voltage controlled oscillator is exported is again as the intermediate frequency pilot signal that will carry out with described intermediate frequency main signal Frequency mixing processing obtaining; Wherein, frequency F3, the frequency division parameter R of described the first frequency divider, the frequency division parameter N of described the second frequency divider of the conditioning signal of reference frequency Fref, the described voltage controlled oscillator output of the reference signal of described the second frequency divider of input of setting, and the frequency F2 with the intermediate frequency pilot signal of the pilot carrier frequency of described setting meets:
11. 1 kinds of inserting of microwave unit, is characterized in that, comprise the device as described in as arbitrary in claim 6～10.
12. 1 kinds of micro-wave extension unit, is characterized in that, comprise the device as described in as arbitrary in claim 6～10.
13. 1 kinds of micro-wave extension systems, is characterized in that, comprise inserting of microwave as claimed in claim 11 unit, and micro-wave extension as claimed in claim 12 unit.
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| US5926067A (en) * | 1998-09-29 | 1999-07-20 | Lucent Technologies Inc. | Sweep pilot technique for a control system that reduces distortion produced by electrical circuits |
| CN1289216A (en) * | 1999-09-14 | 2001-03-28 | 朗迅科技公司 | Method and device for self-adaptive regulation of user's detection signals |
| CN101075752A (en) * | 2006-05-19 | 2007-11-21 | 上海航天卫星应用有限公司 | Satellite controlling system of photovoltaic power station |
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