CN101826903B - Method and device for calibrating magnitude-phase characteristics of multichannel communication system - Google Patents
Method and device for calibrating magnitude-phase characteristics of multichannel communication system Download PDFInfo
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Abstract
The invention provides a method and a device for calibrating magnitude-phase characteristics of a multichannel communication system. The method comprises the following steps of: sending calibrating signals to each data channel of the multichannel communication system for transmission; receiving general signal flows including the calibrating signals passing through the data channels from the each data channel; carrying out related operations on the general signal flows and the calibrating signals not passing through the data channels; extracting a calibrating signal passing through the corresponding data channel from each general signal flow when the results of the related operations reach a maximum value; calculating a value for compensating the magnitude and the phase of the corresponding data channel according to an offset value of the magnitude and the phase of the calibrating signals passing through the corresponding data channel; and compensating the magnitude and the phase of the corresponding data channel according to the compensating value of magnitude and phase. The method and the device for calibrating magnitude-phase characteristics of a multichannel communication system are accurate in calibrating the magnitude and the phase of the data channel.
Description
Technical field
The present invention relates to a kind of magnitude-phase characteristics calibration steps of multi-channel communication systems, the invention still further relates to a kind of magnitude-phase characteristics calibrating installation of multi-channel communication systems.
Background technology
Intelligent antenna technology is the core technology in the 3G (Third Generation) Moblie technology, and smart antenna needs each interchannel of radio frequency to have good amplitude-phase consistency.Consistently need to carry out to each passage the calibration of amplitude and phase place in order to reach interchannel.The magnitude-phase characteristics calibration steps of present multi-channel communication systems mainly contains two kinds:
First method is amplitude and the phase place of utilizing analogue device to detect and adjusting passage, the characteristics of this method are directly simple, but precision is lower, and also can there be inconsistency in the performance of analogue device itself, can not realize well multichannel amplitude and phase place adjustment.
Second method is to utilize the mode of Digital Signal Processing to detect and adjust amplitude and the phase place of passage, and the characteristics of this method are that to adjust precision higher.This method mainly is at first calibrating signal to be sent to a plurality of data channel at transmitting terminal, then transfers to the coupled end of smart antenna by described a plurality of data channel, is sent to by described coupled end and is transferred to the user in the space.In described coupled end, the signal that sends by the calibrated channel feedback that is exclusively used in channel calibration is to described receiving terminal, and described signal comprises described calibrating signal and other data-signals.The close passage that described data channel and described calibrated channel form is called alignment loop.
Described calibrating signal is reacted amplitude and phase deviation characteristic in described each passage through being subject to amplitude in each passage and the impact of phase deviation characteristic after each passage of described multi-channel system.
In theory, described calibrating signal is just finished the transmission in described alignment loop and is back to transmitting terminal after the intrinsic time delay through an alignment loop.Therefore be starting point after the intrinsic time delay through a described alignment loop, the signal that extracts from the signal stream of described calibrating signal and downlink data signal composition is the calibrating signal of returning.Therefore, just can calculate offset to each passage according to the amplitude of the described calibrating signal of returning and phase pushing figure, amplitude and the phase place of each passage are adjusted, the magnitude-phase characteristics of each passage is consistent.
But in above-mentioned second method, when extracting this calibrating signal, the intrinsic time delay that must depend on described alignment loop is constant, could extract exactly the described calibrating signal of returning after described intrinsic time delay.In case the actual time delay of alignment loop and described intrinsic time delay are inconsistent, just can accurately not extract the described calibrating signal of returning, can not accurately calculate the magnitude-phase characteristics of described multi-channel system.Therefore, the magnitude-phase characteristics calibration steps of described multi-channel communication systems is not high to amplitude and the phase alignment accuracy of each data channel.
Summary of the invention
For solving the not high problem of magnitude-phase characteristics calibration steps accuracy of prior art multi-channel communication systems, the invention provides the calibration steps of the magnitude-phase characteristics of the more much higher tunneling traffic of a kind of accuracy system.
A kind of calibration steps of magnitude-phase characteristics of multi-channel communication systems, it may further comprise the steps: will be sent to by the calibrating signal that pseudo noise code forms in each data channel of multi-channel communication systems and transmit; In the downlink data channel calibration process, at the transmitting terminal of described calibrating signal described calibrating signal is sent to the antenna-coupled end of described multi-channel communication systems with downlink data signal by described a plurality of data channel, described calibrating signal and described downlink data signal are transferred to the transmitting terminal of described calibrating signal via a calibrated channel at described antenna-coupled end; In upstream data calibrate process, at the transmitting terminal of described calibrating signal described calibrating signal is transferred to the antenna-coupled end of described multi-channel communication systems by a calibrated channel, described calibrating signal and upstream data. signals is transferred to the transmitting terminal of described calibrating signal by described each data channel at described antenna-coupled end; The transmitting terminal resultant signal that described data channel reception comprises through the described calibrating signal after the described data channel from each in described calibrating signal flows; Described resultant signal stream and the described calibrating signal through described data channel are not carried out related operation, when maximum appears in the result of described related operation, from each described resultant signal stream, extract the calibrating signal through corresponding described data channel; Calculate respectively amplitude and phase pushing figure through the calibrating signal of corresponding described data channel, calculate amplitude and phase compensation value to corresponding described data channel according to described amplitude and phase pushing figure; According to described amplitude and phase compensation value corresponding data channel is carried out amplitude and phase compensation.
Compared with prior art, in the calibration steps of the magnitude-phase characteristics of multi-channel communication systems of the present invention, described calibrating signal adopts pseudo noise code, the resultant signal stream that receives is carried out related operation with described calibrating signal, utilize the characteristic of communications field related operation, when maximum appears in the result of described related operation, extract data slot corresponding in the described resultant signal stream as the calibrating signal of returning, needn't depend on the intrinsic time delay of multi-channel communication systems.When the actual time delay of multi-channel communication systems and described intrinsic time delay are inconsistent, can not affect the extraction to described calibrating signal yet.Therefore the calibration steps of the magnitude-phase characteristics of multi-channel communication systems of the present invention is more accurate, is subjected to the time delay influence of communication system less.
For solving the not high problem of magnitude-phase characteristics calibrating installation accuracy of prior art multi-channel communication systems, the invention provides the calibrating installation of the magnitude-phase characteristics of the more much higher tunneling traffic of a kind of accuracy system.
A kind of calibrating installation of magnitude-phase characteristics of multi-channel communication systems comprises: a calibrating signal sending module, transmit for each data channel that will be sent to by the calibrating signal that pseudo noise code forms multi-channel communication systems;
In the downlink data channel calibration process, at the transmitting terminal of described calibrating signal described calibrating signal is sent to the antenna-coupled end of described multi-channel communication systems with downlink data signal by described a plurality of data channel, described calibrating signal and described downlink data signal are transferred to the transmitting terminal of described calibrating signal via a calibrated channel at described antenna-coupled end;
In upstream data calibrate process, at the transmitting terminal of described calibrating signal described calibrating signal is transferred to the antenna-coupled end of described multi-channel communication systems by a calibrated channel, described calibrating signal and upstream data. signals is transferred to the transmitting terminal of described calibrating signal by described each data channel at described antenna-coupled end; A calibrating signal extraction module, be used for flowing at the transmitting terminal resultant signal that described data channel reception comprises through the described calibrating signal after the described data channel from each of described calibrating signal, and described resultant signal stream and the described calibrating signal through described data channel not carried out related operation, when maximum appears in the result of described related operation, from each described resultant signal stream, extract the calibrating signal through corresponding described data channel; A compensation value calculation module is used for calculating respectively amplitude and phase pushing figure through the calibrating signal of corresponding described data channel, calculates amplitude and phase compensation value to corresponding described data channel according to described amplitude and phase pushing figure; One channel compensation module is used for according to described amplitude and phase compensation value corresponding data channel being carried out amplitude and phase compensation.
Compared with prior art, in the calibrating installation of the magnitude-phase characteristics of multi-channel communication systems of the present invention, described calibrating signal adopts pseudo noise code, described calibrating signal extraction module carries out related operation with the resultant signal stream that receives with described calibrating signal, utilize the characteristic of communications field related operation, when maximum appears in the result of described related operation, extract data slot corresponding in the described resultant signal stream as the calibrating signal of returning, needn't depend on the intrinsic time delay of multi-channel communication systems.When the actual time delay of multi-channel communication systems and described intrinsic time delay are inconsistent, can not affect the extraction to described calibrating signal yet.Therefore the calibration steps of the magnitude-phase characteristics of multi-channel communication systems of the present invention is more accurate, is subjected to the time delay influence of communication system less.
Description of drawings
Fig. 1 is the flow chart of the magnitude-phase characteristics calibration steps of multi-channel communication systems of the present invention;
Fig. 2 is that the signal of magnitude-phase characteristics calibration steps in the downlink data channel calibration process of multi-channel communication systems of the present invention flows to schematic diagram;
Fig. 3 is that the signal of magnitude-phase characteristics calibration steps in upstream data calibrate process of multi-channel communication systems of the present invention flows to schematic diagram;
Fig. 4 is the structural representation of the magnitude-phase characteristics calibrating installation of multi-channel communication systems of the present invention;
Fig. 5 is the structural representation of calibrating signal extraction module of a kind of preferred implementation of magnitude-phase characteristics calibrating installation of multi-channel communication systems of the present invention.
Wherein, the magnitude-phase characteristics calibrating installation of 10 multi-channel communication systems; 11 calibrating signal sending modules; 13 calibrating signal extraction modules; 131 preliminary position calculation submodules; 133 subsignals stream intercepting submodule; 135 related operation submodules; 137 extract implementation sub-module; 15 compensation value calculation modules; 17 channel compensation modules; 171 phase compensation submodules; 173 Amplitude Compensation submodules.
Embodiment
See also Fig. 1, Fig. 1 is the flow chart of the magnitude-phase characteristics calibration steps of multi-channel communication systems of the present invention.
The flow process of the magnitude-phase characteristics calibration steps of described multi-channel communication systems starts from step S101.
Then, in step S102, will be sent to by the calibrating signal that pseudo noise code forms in each data channel of multi-channel communication systems and transmit.
When the calibrating signal that described pseudo noise code forms was propagated in described data channel, itself can produce different amplitudes and phase pushing figure along with the transmission course in each passage.Described amplitude and phase pushing figure are that the data channel by correspondence causes, and therefore can react amplitude and the phase deviation characteristic of described data channel.
Described calibrating signal being sent to when transmitting in described each data channel, both can send separately described calibrating signal, also described calibrating signal can be sent with other data-signals.The following describes in the uplink and downlink data channel calibration process the preferred send mode of described calibrating signal.
See also Fig. 2, Fig. 2 is that the signal of magnitude-phase characteristics calibration steps in the downlink data channel calibration process of multi-channel communication systems of the present invention flows to schematic diagram.
In multi-channel system downlink data channel calibration process, at the calibrating signal transmitting terminal described calibrating signal is sent to the user with needs downlink data signal is sent in described a plurality of data channel, be transferred to the antenna-coupled end by described data channel, extract the resultant signal stream that is formed by described calibrating signal and described downlink data signal at described antenna-coupled end, by a calibrated channel that is exclusively used in communication channel calibration, described resultant signal stream is fed back to described calibrating signal transmitting terminal.
See also Fig. 3, Fig. 3 is that the signal of magnitude-phase characteristics calibration steps in upstream data calibrate process of multi-channel communication systems of the present invention flows to schematic diagram.
In multi-channel system upstream data calibrate process, described calibrating signal is sent in the calibrated channel that is exclusively used in communication channel calibration at described calibrating signal transmitting terminal, and be transferred to the antenna-coupled end by described calibrated channel.Then, at described antenna-coupled end with described calibrating signal with transferring to described calibrating signal transmitting terminal from user's upstream data. signals each data channel by described multi-channel communication systems.
In step S104, receive the resultant signal stream that comprises through the described calibrating signal after the described data channel from each described data channel.
In multi-channel system downlink data channel calibration process, receive the described calibrating signal and the downlink data signal that return from described antenna-coupled end.
In multi-channel system upstream data calibrate process, receive described calibrating signal and upstream data. signals.
In step S106, described resultant signal stream and the described calibrating signal of not passing through described data channel are carried out related operation, when maximum appears in the result of described related operation, from each described resultant signal stream, extract the calibrating signal through corresponding described data channel.
According to the characteristic of pseudo noise code and the relation of related operation: carry out related operation, the position that the most similar burst starting point is exactly correlated results maximum place with known pseudo-random code sequence and the burst that receives.
Therefore, resultant signal stream to described reception carries out related operation with the described calibrating signal of not passing through described data channel, when the correlated results maximum occurs, be the sequence starting point the most similar to described calibrating signal in the described resultant signal stream, the starting point of the calibrating signal of namely returning.Take described the most similar sequence starting point as the basis, to extract in the described resultant signal stream, the data of the equal in length of length and described calibrating signal obtain through the described calibrating signal after the described data channel.
Simultaneously, as a kind of preferred implementation, in order to reduce computing, can be in advance according to after the described data channel of the described calibrating signal of the intrinsic latency prediction separately of each described data channel through correspondence, the preliminary position in described resultant signal stream.After receiving described resultant signal stream, comprise the subsignal stream of described calibrating signal according to the intercepting in described resultant signal stream of described preliminary position.Described subsignal stream and the described calibrating signal through described data channel are not carried out related operation, and when maximum appears in the result of described related operation, extract data corresponding in the described subsignal stream as the calibrating signal of returning.
Because in theory, described calibrating signal can be returned after described intrinsic time delay, therefore, can calculate described calibrating signal by after each described data channel according to described intrinsic time delay, corresponding position in described resultant signal stream.Yet, because the time delay real-time change situation of described data channel, described calibrating signal by each described data channel after physical location in described resultant signal flows may be incomplete same with described preliminary position.Therefore, in order necessarily to comprise described calibrating signal in the subsignal stream that guarantees to intercept, described preliminary position should add certain error range on the basis of the exact value that calculates.That is to say that described subsignal stream comprises the described calibrating signal of returning and other data-signals in described error range.
When in described subsignal stream, extracting the described calibrating signal of returning, described subsignal stream is carried out related operation with described calibrating signal.If the calibrating signal through described data channel is not S (t-t
0), described data channel is simplified modeling, the subsignal stream that then is truncated to is k*exp (j* θ) * S (t-t
1), wherein, k*exp (j* θ) is amplitude and the phase deviation that described data channel is brought, t0 and t1 are respectively the time delays of calibrating signal and acknowledge(ment) signal, by the characteristic of related operation as can be known, when t0=t1, the result of related operation reaches maximum, that is the calibrating signal of the signal that receives during with transmission reaches the most similar sequence starting point.This moment, the described sequence starting point of intercepting began in described subsignal stream, with described calibrating signal equal in length data slot, was through the described calibrating signal after the described data channel.
Predicting function by described preliminary position, the described subsignal stream of intercepting carries out related operation in described resultant signal stream, do not need again whole resultant signal stream all to be carried out related operation, can reduce the data volume of computing, make the magnitude-phase characteristics calibration steps of described multi-channel communication systems easier, fast.
In step S108, calculate respectively amplitude and phase pushing figure through the calibrating signal of corresponding described data channel, calculate amplitude and phase compensation value to corresponding described data channel according to described amplitude and phase pushing figure.
Calculate described calibrating signal through amplitude and the phase pushing figure of the calibrating signal of corresponding described data channel, the amplitude of described calibrating signal and phase pushing figure are owing to causing by each described data channel, it has represented amplitude and phase pushing figure that corresponding described data channel causes the signal that transmits therein, and each described data channel all has amplitude and the phase pushing figure of oneself.
When calculating described amplitude and phase compensation value, at first choose a standard value, described standard value can be the mean value of amplitude and the phase pushing figure of each described data channel.Also wherein the amplitude of any one described data channel and phase pushing figure as described standard value.Take described standard value as the basis, the difference of each described data channel and described standard value is exactly to the amplitude of described data channel and phase compensation value, comprises to the amplitude compensation value of each described data channel with to the phase compensation value of each described data channel.
In step S110, according to described amplitude and phase compensation value corresponding data channel is carried out amplitude and phase compensation.
According to described phase compensation value, the described data-signal that transmits is carried out phase compensation in each passage.According to described amplitude compensation value, the described data-signal that transmits is carried out Amplitude Compensation in each passage.
At step S112, the flow process of the magnitude-phase characteristics calibration steps of described multi-channel communication systems finishes.
Compared with prior art, in the calibration steps of the magnitude-phase characteristics of multi-channel communication systems of the present invention, described calibrating signal adopts pseudo noise code, the resultant signal stream that receives and the described calibrating signal of not passing through described data channel are carried out related operation, utilize the characteristic of communications field related operation, when maximum appears in the result of described related operation, from described resultant signal stream, extract through the described calibrating signal after the described data channel, the intrinsic time delay of the multi-channel communication systems that needn't place one's entire reliance upon.When the actual time delay of multi-channel communication systems and described intrinsic time delay are inconsistent, can not affect the extraction to described calibrating signal yet.Therefore the calibration steps of the magnitude-phase characteristics of multi-channel communication systems of the present invention is more accurate, is subjected to the time delay influence of communication system less.
Simultaneously, in the downlink data channel calibration process, described calibrating signal sent in described a plurality of data channel with downlink data signal transmit, and in the data feedback channel calibration process, described calibrating signal is transmitted with upstream data. signals.Carry out the magnitude-phase characteristics calibration of described data channel when transmission uplink and downlink data are carried out basic communication, save system channel resource.And what can guarantee described calibrating signal reaction is the real-time magnitude-phase characteristics of described uplink and downlink data channel, adjust in real time, make described amplitude and phase compensation more meet amplitude and the phase pushing figure actual change situation of described data channel, the calibration steps of the magnitude-phase characteristics of described multi-channel communication systems is more accurate.
When in described resultant signal stream, extracting the described calibrating signal of returning, at first by the described preliminary position of the intrinsic time-delay calculation of described data channel, the described subsignal stream of intercepting in described resultant signal stream, again described subsignal stream and the described calibrating signal of not passing through described data channel are carried out related operation, again whole resultant signal stream is all carried out related operation with regard to not needing, can reduce the data volume of computing, make the magnitude-phase characteristics calibration steps of described multi-channel communication systems easier, fast.
See also Fig. 4, Fig. 4 is the structural representation of the magnitude-phase characteristics calibrating installation of multi-channel communication systems of the present invention.
The magnitude-phase characteristics calibrating installation 10 of described multi-channel communication systems comprises calibrating signal sending module 11, calibrating signal extraction module 13, compensation value calculation module 15 and channel compensation module 17.
Described calibrating signal sending module 11 transmits for each data channel that will be sent to by the calibrating signal that pseudo noise code forms multi-channel communication systems.
When the calibrating signal that described pseudo noise code forms was transmitted in described data channel, itself can produce different amplitudes and phase pushing figure along with the transmission course in each passage.Described amplitude and phase pushing figure are that the data channel by correspondence causes, and therefore can react amplitude and the phase deviation characteristic of described data channel.
Described calibrating signal being sent to when transmitting in described each data channel, both can send separately described calibrating signal, also described calibrating signal can be sent with other data-signals.The following describes in the uplink and downlink data channel calibration process the preferred send mode of 11 pairs of described calibrating signals of described calibrating signal sending module.
In multi-channel system downlink data channel calibration process, described calibrating signal sending module 11 is controlled at the calibrating signal transmitting terminal described calibrating signal is sent in described a plurality of data channel with the downlink data signal that needs are sent to the user, be transferred to the antenna-coupled end by described data channel, extract the resultant signal stream that is formed by described calibrating signal and described downlink data signal at described antenna-coupled end, by a calibrated channel that is exclusively used in communication channel calibration, described resultant signal stream is fed back to described calibrating signal transmitting terminal.
In multi-channel system upstream data calibrate process, described calibrating signal sending module 11 sends to described calibrating signal in the calibrated channel that is exclusively used in communication channel calibration, and is transferred to the antenna-coupled end by described calibrated channel.Then, at described antenna-coupled end with described calibrating signal with transferring to described calibrating signal transmitting terminal from user's upstream data. signals each data channel by described multi-channel communication systems.
As a kind of preferred implementation, described calibrating signal sending module 11 comprises that one sends control submodule (not shown), a calibrating signal sub module stored (not shown) and a transmission submodule (not shown), described transmission control submodule is used for the output control command, controls described calibrating signal sub module stored and described transmission submodule; Described calibrating signal sub module stored is used for storing described calibrating signal, and according to the control command of described transmission control submodule described calibrating signal is sent to described transmission submodule; Described transmission submodule is used for the control command according to described transmission control submodule, in the downlink data channel calibration process, described calibrating signal is inserted in the downlink data signal, and described calibrating signal sent in described a plurality of data channel with described downlink data signal transmits; In upstream data calibrate process, described transmission submodule is used for the control command according to described transmission control submodule, and described calibrating signal is sent in the calibrated channel that is exclusively used in communication channel calibration.
Described calibrating signal extraction module 13 is used for receiving the resultant signal stream that comprises through the described calibrating signal after the described data channel from each described data channel.
In multi-channel system downlink data channel calibration process, described calibrating signal extraction module 13 receives described calibrating signal and the downlink data signal that returns from described antenna-coupled end.In multi-channel system upstream data calibrate process, described calibrating signal extraction module 13 receives described calibrating signal and upstream data. signals.
After described calibrating signal extraction module 13 receives described resultant signal stream, described resultant signal stream and the described calibrating signal of not passing through described data channel are carried out related operation, when maximum appears in the result of described related operation, from each described resultant signal stream, extract the calibrating signal through corresponding described data channel.
According to the characteristic of pseudo noise code and the relation of related operation: carry out related operation, the position that the most similar burst starting point is exactly correlated results maximum place with known pseudo-random code sequence and the burst that receives.
Therefore, in described calibrating signal extraction module 13, resultant signal stream to described reception carries out related operation with the described calibrating signal of not passing through described data channel, when the correlated results maximum occurs, be the sequence starting point the most similar to described calibrating signal in the described resultant signal stream, the starting point of the calibrating signal of namely returning.Take described the most similar sequence starting point as the basis, to extract in the described resultant signal stream, the data of the equal in length of length and described calibrating signal obtain through the described calibrating signal after the described data channel.
See also Fig. 5, Fig. 5 is the structural representation of calibrating signal extraction module of a kind of preferred implementation of magnitude-phase characteristics calibrating installation of multi-channel communication systems of the present invention.
As a kind of preferred implementation, described calibrating signal extraction module 13 comprises preliminary position calculation submodule 131, subsignal stream intercepting submodule 133, related operation submodule 135 and extracts implementation sub-module 137.
After described preliminary position calculation submodule 131 is used for passing through corresponding described data channel according to the described calibrating signal of the intrinsic latency prediction separately of each described data channel in advance, the preliminary position in described resultant signal stream.
Described subsignal stream intercepting submodule 133 is used for after receiving described resultant signal stream, comprises the subsignal stream of described calibrating signal according to the intercepting in described resultant signal stream of described preliminary position.
Described related operation submodule 135 is used for described subsignal stream and does not carry out related operation through the described calibrating signal of described data channel.
Described extraction implementation sub-module 137 is used for when maximum appears in the result of described related operation, extracts data corresponding in the described subsignal stream as the calibrating signal of returning.
Because in theory, described calibrating signal can be returned after described intrinsic time delay, therefore, described preliminary position calculation submodule 131 can calculate described calibrating signal by after each described data channel according to described intrinsic time delay, corresponding position in described resultant signal stream.Yet, because the time delay real-time change situation of described data channel, described calibrating signal by each described data channel after physical location in described resultant signal flows may be incomplete same with described preliminary position.Therefore, in order necessarily to comprise described calibrating signal in the subsignal stream that guarantees to intercept, when described subsignal stream intercepting submodule 133 calculates described preliminary position, add certain error range on the basis of the exact value that calculates.That is to say that described subsignal stream comprises the described calibrating signal of returning and other data-signals in described error range.
When described related operation submodule 135 extracts the described calibrating signal of returning in described subsignal stream, described subsignal stream is carried out related operation with described calibrating signal.If the calibrating signal through described data channel is not S (t-t
0), described data channel is simplified modeling, the subsignal stream that then is truncated to is k*exp (j* θ) * S (t-t
1), wherein, k*exp (j* θ) is amplitude and the phase deviation that described data channel is brought, t0 and t1 are respectively calibrating signal and the time delay that receives signal, by the characteristic of related operation as can be known, when t0=t1, the result of related operation reaches maximum, that is the calibrating signal of the signal that receives during with transmission reaches the most similar sequence starting point.
Described extraction implementation sub-module 137 described sequence starting point of intercepting in described subsignal stream begins, and with described calibrating signal equal in length data slot, is through the described calibrating signal after the described data channel.Calculate described preliminary position by described subsignal stream intercepting submodule 133, the described subsignal stream of intercepting in described resultant signal stream, then 135 of described related operation submodules flow to the line correlation computing to described subsignal, do not need again whole resultant signal stream all to be carried out related operation, can reduce the data volume of computing, magnitude-phase characteristics calibration to described multi-channel communication systems is easier, fast.
As another kind of preferred implementation, described calibrating signal extraction module 13 comprises that one receives control submodule (not shown), reception signal storage submodule (not shown) and an implementation sub-module (not shown).Described reception control submodule is used for the output control command and controls described reception signal storage submodule and described implementation sub-module.Described implementation sub-module is used for according to after the described data channel of the described calibrating signal of the intrinsic latency prediction separately of each described data channel through correspondence, the preliminary position in described resultant signal stream.After receiving described resultant signal stream, comprise the subsignal stream of described calibrating signal according to the intercepting in described resultant signal stream of described preliminary position.Described subsignal stream and the described calibrating signal through described data channel are not carried out related operation, and when maximum appears in the result of described related operation, extract data corresponding in the described subsignal stream as the calibrating signal of returning.Described reception signal storage submodule is used for storing subsignal stream and the described calibrating signal of returning of intercepting.
Described compensation value calculation module 15 is used for calculating respectively amplitude and the phase pushing figure through the calibrating signal of corresponding described data channel, calculates amplitude and phase compensation value to corresponding described data channel according to described amplitude and phase pushing figure.
Described compensation value calculation module 15 is calculated respectively described calibrating signal through amplitude and the phase pushing figure of the calibrating signal of corresponding described data channel, the amplitude of described calibrating signal and phase pushing figure are owing to causing by described data channel, it has represented amplitude and phase pushing figure that corresponding described data channel causes the signal that transmits therein, and each described data channel all has amplitude and the phase pushing figure of oneself.
When described compensation value calculation module 15 is calculated described amplitude and phase compensation value, at first choose a standard value, described standard value can be the mean value of amplitude and the phase pushing figure of each described data channel.Also wherein the amplitude of any one described data channel and phase pushing figure as described standard value.Take described standard value as the basis, the difference of each described data channel and described standard value is exactly to the amplitude of described data channel and phase compensation value, comprises to the amplitude compensation value of each described data channel with to the phase compensation value of each described data channel.
As a kind of preferred implementation, described compensation value calculation module 15 comprises a phase compensation value computing module (not shown) and an amplitude compensation value computing module (not shown).Described phase compensation value computing module is used for calculating the phase compensation value to each data channel; Described amplitude compensation value computing module is used for calculating the amplitude compensation value to each data channel.
Described channel compensation module 17 is used for according to described amplitude and phase compensation value corresponding data channel being carried out amplitude and phase compensation.Described channel compensation module 17 comprises phase compensation submodule 171 and Amplitude Compensation submodule 172.
Described phase compensation submodule 171 is used for according to described phase compensation value, and the described data-signal that transmits in each passage is carried out phase compensation.
Described Amplitude Compensation submodule 172 is used for according to described amplitude compensation value, and the described data-signal that transmits in each passage is carried out Amplitude Compensation.
Compared with prior art, in the calibrating installation of the magnitude-phase characteristics of multi-channel communication systems of the present invention, described calibrating signal adopts pseudo noise code, described calibrating signal extraction module 13 flows the resultant signal that receives and does not carry out related operation through the described calibrating signal of described data channel, utilize the characteristic of communications field related operation, when maximum appears in the result of described related operation, from described resultant signal stream, extract through the described calibrating signal after the described data channel, the intrinsic time delay of the multi-channel communication systems that needn't place one's entire reliance upon.When the actual time delay of multi-channel communication systems and described intrinsic time delay are inconsistent, can not affect the extraction to described calibrating signal yet.Therefore the calibrating installation of the magnitude-phase characteristics of multi-channel communication systems of the present invention is more accurate, is subjected to the time delay influence of communication system less.
Simultaneously, in the downlink data channel calibration process, described calibrating signal sending module 11 sends to described calibrating signal in described a plurality of data channel with downlink data signal and transmits, and in the data feedback channel calibration process, described calibrating signal sending module 11 transmits described calibrating signal with upstream data. signals.Carry out the magnitude-phase characteristics calibration of described data channel when transmission uplink and downlink data are carried out basic communication, save system channel resource.And what can guarantee described calibrating signal reaction is the real-time magnitude-phase characteristics of described uplink and downlink data channel, adjust in real time, make described amplitude and phase compensation more meet amplitude and the phase pushing figure actual change situation of described data channel, the calibration steps of the magnitude-phase characteristics of described multi-channel communication systems is more accurate.
When described calibrating signal extraction module 13 extracts the described calibrating signal of returning in described resultant signal stream, at first calculate described preliminary position by described preliminary position calculation submodule 131, then described subsignal stream intercepting submodule 133 described subsignal of intercepting in described resultant signal stream flows, transfer to again 135 pairs of described subsignal streams of described related operation submodule and do not carry out related operation through the described calibrating signal of described data channel, again whole resultant signal stream is all carried out related operation with regard to not needing, can reduce the data volume of computing, make the magnitude-phase characteristics calibrating installation operation of described multi-channel communication systems easier, fast.
Above-described embodiment of the present invention does not consist of the restriction to protection range of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (8)
1. the calibration steps of the magnitude-phase characteristics of a multi-channel communication systems is characterized in that may further comprise the steps:
To be sent to by the calibrating signal that pseudo noise code forms in each data channel of multi-channel communication systems and transmit; In the downlink data channel calibration process, at the transmitting terminal of described calibrating signal described calibrating signal is sent to the antenna-coupled end of described multi-channel communication systems with downlink data signal by described a plurality of data channel, described calibrating signal and described downlink data signal are transferred to the transmitting terminal of described calibrating signal via a calibrated channel at described antenna-coupled end;
In upstream data calibrate process, at the transmitting terminal of described calibrating signal described calibrating signal is transferred to the antenna-coupled end of described multi-channel communication systems by a calibrated channel, described calibrating signal and upstream data. signals is transferred to the transmitting terminal of described calibrating signal by described each data channel at described antenna-coupled end; The transmitting terminal resultant signal that described data channel reception comprises through the described calibrating signal after the described data channel from each in described calibrating signal flows;
Described resultant signal stream and the described calibrating signal through described data channel are not carried out related operation, when maximum appears in the result of described related operation, from each described resultant signal stream, extract the calibrating signal through corresponding described data channel;
Calculate respectively amplitude and phase pushing figure through the calibrating signal of corresponding described data channel, calculate amplitude and phase compensation value to corresponding described data channel according to described amplitude and phase pushing figure;
According to described amplitude and phase compensation value corresponding data channel is carried out amplitude and phase compensation.
2. the magnitude-phase characteristics calibration steps of multi-channel communication systems as claimed in claim 1, it is characterized in that, described described resultant signal is flowed with the described calibrating signal of not passing through described data channel carried out related operation, when maximum appearred in the result of described related operation, the step of extracting the calibrating signal of described data channel corresponding to process from each described resultant signal stream comprised:
After intrinsic each described data channel of time-delay calculation process according to each described data channel, the preliminary position of described calibrating signal in each described resultant signal stream;
The subsignal stream that comprises described calibrating signal according to the intercepting in each described resultant signal stream of described preliminary position;
Described subsignal flow point and is not carried out related operation through the calibrating signal of described data channel;
When maximum appears in the result of described related operation, from described subsignal stream, extract described calibrating signal.
3. the magnitude-phase characteristics calibration steps of multi-channel communication systems as claimed in claim 1 is characterized in that, described step of corresponding data channel being carried out amplitude and phase compensation according to described amplitude and phase compensation value comprises:
According to described phase compensation value, the data-signal that transmits is carried out the phase place adjustment in each described data channel;
According to described amplitude compensation value, the data-signal that transmits is carried out the amplitude adjustment in each described data channel.
4. the calibrating installation of the magnitude-phase characteristics of a multi-channel communication systems is characterized in that comprising:
The calibrating signal sending module transmits for each data channel that will be sent to by the calibrating signal that pseudo noise code forms multi-channel communication systems; In the downlink data channel calibration process, described calibrating signal sending module sends to the antenna-coupled end of described multi-channel communication systems with downlink data signal by described a plurality of data channel with described calibrating signal, described calibrating signal and described downlink data signal is transferred to the transmitting terminal of described calibrating signal at described antenna-coupled end via a calibrated channel; In the data feedback channel calibration process, described calibrating signal sending module is transferred to the antenna-coupled end of described multi-channel communication systems with described calibrating signal by a calibrated channel, described calibrating signal and upstream data. signals is transferred to the transmitting terminal of described calibrating signal at described antenna-coupled end by described each data channel;
The calibrating signal extraction module, be used for flowing at the transmitting terminal resultant signal that described data channel reception comprises through the described calibrating signal after the described data channel from each of described calibrating signal, and described resultant signal stream and the described calibrating signal through described data channel not carried out related operation, when maximum appears in the result of described related operation, from each described resultant signal stream, extract the calibrating signal through corresponding described data channel;
The compensation value calculation module is used for calculating respectively amplitude and phase pushing figure through the calibrating signal of corresponding described data channel, calculates amplitude and phase compensation value to corresponding described data channel according to described amplitude and phase pushing figure;
The channel compensation module is used for according to described amplitude and phase compensation value corresponding data channel being carried out amplitude and phase compensation.
5. the magnitude-phase characteristics calibrating installation of multi-channel communication systems as claimed in claim 4 is characterized in that, described calibrating signal extraction module comprises:
Preliminary position calculation submodule, be used for according to the described calibrating signal of the intrinsic time-delay calculation of each described data channel through after each described data channel in the preliminary position of each described resultant signal stream;
Subsignal stream intercepting submodule is used for intercepting the subsignal stream that comprises described calibrating signal according to described preliminary position at each described resultant signal stream;
The related operation submodule is used for described subsignal flow point and is not carried out related operation through the calibrating signal of described data channel;
Extract implementation sub-module, be used for when maximum appears in the result of described related operation, from described subsignal stream, extract described calibrating signal.
6. the magnitude-phase characteristics calibrating installation of multi-channel communication systems as claimed in claim 4 is characterized in that, described channel compensation module comprises:
The phase compensation submodule is used for according to described phase compensation value, and the data-signal that transmits in each described data channel is carried out the phase place adjustment;
The Amplitude Compensation submodule is used for according to described amplitude compensation value, and the data-signal that transmits in each described data channel is carried out the amplitude adjustment.
7. the magnitude-phase characteristics calibrating installation of multi-channel communication systems as claimed in claim 4 is characterized in that: described calibrating signal sending module comprises and sends control submodule, calibrating signal sub module stored and send submodule;
Described transmission control submodule is used for the output control command, controls described calibrating signal sub module stored and described transmission submodule;
Described calibrating signal sub module stored is used for storing described calibrating signal, and according to the control command of described transmission control submodule described calibrating signal is sent to described transmission submodule;
Described transmission submodule is used for the control command according to described transmission control submodule, described calibrating signal is inserted in the downlink data signal, and described calibrating signal sent in described a plurality of data channel with described downlink data signal transmits.
8. the magnitude-phase characteristics calibrating installation of multi-channel communication systems as claimed in claim 4 is characterized in that: described calibrating signal extraction module comprises and receives the control submodule, receives signal storage submodule and implementation sub-module;
Described reception control submodule is used for the output control command and controls described reception signal storage submodule and described implementation sub-module;
Described implementation sub-module be used for according to the described calibrating signal of the intrinsic time-delay calculation of each described data channel through after each described data channel in the preliminary position of each described resultant signal stream; The subsignal stream that comprises described calibrating signal according to the intercepting in each described resultant signal stream of described preliminary position; Described subsignal flow point and is not carried out related operation through the calibrating signal of described data channel; When maximum appears in the result of described related operation, from described subsignal stream, extract the calibrating signal through returning after the described data channel;
Described reception signal storage submodule be used for to store the calibrating signal of returning after the subsignal stream of intercepting and the described data channel of described process.
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| CN104158601A (en) * | 2013-12-31 | 2014-11-19 | 南京长峰航天电子科技有限公司 | Amplitude and phase calibration method based on digital channelization |
| ES2748170T3 (en) * | 2014-09-11 | 2020-03-13 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Method and apparatus to facilitate antenna and transceiver calibration |
| CN106302302B (en) * | 2015-05-20 | 2017-12-08 | 北京理工大学 | A kind of width of multi channel signals transmitting terminal is mutually monitored on-line and real-time compensation method |
| CN107689842A (en) * | 2016-08-05 | 2018-02-13 | 北京信威通信技术股份有限公司 | A kind of method and device of calibration data |
| WO2019094324A1 (en) * | 2017-11-13 | 2019-05-16 | X Development Llc | Beamforming calibration |
| US20230018017A1 (en) * | 2019-12-13 | 2023-01-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for antenna calibration |
| CN111490835B (en) * | 2020-03-05 | 2022-08-26 | 西安宇飞电子技术有限公司 | Self-calibration method, device and equipment for narrow-band signal |
| CN113296064B (en) * | 2021-04-13 | 2024-07-02 | 武汉卓目科技股份有限公司 | SAR radar receiving channel time delay calibration method and system based on Frank code |
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