CN116318046B - Method for compensating attenuator and phase shifter - Google Patents
Method for compensating attenuator and phase shifter Download PDFInfo
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- CN116318046B CN116318046B CN202310574705.3A CN202310574705A CN116318046B CN 116318046 B CN116318046 B CN 116318046B CN 202310574705 A CN202310574705 A CN 202310574705A CN 116318046 B CN116318046 B CN 116318046B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/24—Frequency-independent attenuators
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/16—Networks for phase shifting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method for compensating parasitic phase modulation of an attenuator, wherein the attenuator is communicated with a phase shifter, and the phase shifter shifts the phase of a signal from the attenuator. The invention also discloses a method for compensating the parasitic amplitude modulation of the phase shifter, wherein the phase shifter is communicated with an attenuator, and the attenuator attenuates the signal from the phase shifter. The invention also relates to a T/R component, a control unit, a medium and a program product of the radio frequency system.
Description
Technical Field
The present invention relates to the field of radio frequency communications, and in particular, to a method of compensating an attenuator, a phase shifter, a T/R assembly, a control unit, a medium, and a program product.
Background
In the prior art, the control circuits of the phase shifter module and the attenuator module are mutually independent, and although the control circuits are simple and easy to realize, the parasitic amplitude modulation and the parasitic phase modulation of the phase shifter and the attenuator cannot be changed, but larger parasitic amplitude modulation/phase exists in a link system, and for the phase shifter, the effect of compensating the parasitic amplitude modulation is generally achieved by making a redundant attenuator in the phase shifter in advance so as to finely adjust different phase shifting states, and the redundant phase shifter is not added in the attenuator in general, because the layout area of the phase shifter is larger and the cost is higher.
How to adjust the parasitic amplitude modulation of the phase shifter and the parasitic phase modulation of the attenuator without adding any additional components is a problem to be solved.
Disclosure of Invention
The invention aims to provide a method for compensating an attenuator, a phase shifter, a T/R assembly, a control unit, a medium and a program product, which aim to solve the problems of parasitic amplitude modulation of the phase shifter and parasitic phase modulation of the attenuator.
In a first aspect, embodiments of the present invention disclose a method of compensating for phase-shifting attenuation, the attenuator in communication with a phase shifter that phase-shifts a signal from the attenuator, the method comprising:
determining a current temperature value of the attenuator;
predicting a first parasitic phase modulation predicted value of the attenuator in a maximum attenuation state at the current temperature according to a first mathematical model;
determining the current attenuation control state of the attenuator;
determining a second parasitic phase modulation predicted value of the attenuator in the current temperature and current attenuation control state according to a second mathematical model and the first parasitic phase modulation predicted value, wherein the first mathematical model and the second mathematical model are linear interpolation methods;
generating a phase shifter control code based on the second spurious phase modulation prediction value, and transmitting the phase shifter control code to the phase shifter to adjust the phase shift amount of the phase shifter.
Optionally, predicting a first spurious phasing prediction value of a maximum attenuation state of the attenuator at the temperature according to a first mathematical model comprises:
obtaining a parasitic phase modulation value theta of the maximum attenuation state of the attenuator at the first temperature 1 Parasitic phase modulation value theta of maximum attenuation state at second temperature 2 ；
Parasitic phase modulation value θ based on the maximum attenuation state at the first temperature 1 Parasitic phase modulation value θ of maximum attenuation state at the second temperature 2 And predicting a first parasitic phase modulation predicted value of the maximum attenuation state at the current temperature by the first mathematical model.
Optionally, the first temperature is the lowest temperature T min The second temperature is the highest temperature T max 。
Optionally, obtaining the parasitic phase modulation value θ of the maximum attenuation state at the first temperature by using an empirical or simulated or measured value 1 And a parasitic phase modulation value θ of the maximum attenuation state at the second temperature 2 。
Optionally, the first parasitic phase modulation prediction value is
Optionally, the second parasitic phase modulation prediction value isWherein T is the current temperature value, N is the attenuator control bit number, and i is the attenuation control state.
Optionally, before generating the phase shifter control code, the method further includes: and automatically rounding the second parasitic phase modulation predicted value according to the step to determine the step multiple.
Optionally, a current temperature value of the attenuator is determined using a temperature sensor.
The embodiment of the invention discloses a T/R component of a radio frequency system, which comprises a phase shifter and an attenuator; the T/R assembly further comprises a control unit configured to perform the above-described method of compensating for spurious phase modulation of an attenuator to control the phase shifting of the phase shifter to cancel spurious phase modulation of the attenuator.
An embodiment of the invention discloses a control unit storing a processor and a memory of executable instructions configured to execute the instructions to implement the method of compensating for spurious phase modulation of an attenuator described above.
The embodiment of the invention discloses a computer readable storage medium, which is characterized in that at least one computer instruction is stored in the computer readable storage medium, and the at least one instruction is loaded and executed by a processor to realize the method for compensating the parasitic phase modulation of an attenuator.
An embodiment of the invention discloses a computer program product characterized in that the computer program product comprises computer instructions which, when executed, implement the above-mentioned method of compensating for spurious phase modulation of an attenuator.
Compared with the prior art, the embodiment of the invention has the following effects:
the invention can compensate the parasitic phase modulation of the attenuator through the phase shifting characteristic of the phase shifter, predicts the parasitic phase modulation under the current control state and temperature, determines the parasitic phase modulation value to be compensated according to the mathematical model, outputs the phase shifter control code for regulating the parasitic phase modulation to the phase shifter in the link system, does not need an additional phase shifting unit, can eliminate the parasitic phase modulation, and effectively reduces the area and the cost of the chip.
In a second aspect, embodiments of the present invention disclose a method of compensating for parasitic amplitude modulation of a phase shifter in communication with an attenuator that phase shifts a signal from the phase shifter, the method comprising:
determining a current temperature value of the phase shifter;
predicting a first parasitic amplitude modulation predicted value of the maximum phase shift state of the phase shifter at the current temperature according to a first mathematical model;
determining the current phase shift control state of the phase shifter;
determining a second parasitic amplitude modulation predicted value of the phase shifter in the current temperature and current phase shift control state according to a second mathematical model and the first parasitic amplitude modulation predicted value, wherein the first mathematical model and the second mathematical model are linear interpolation methods;
And generating an attenuator control code based on the second parasitic amplitude modulation predicted value, and sending the attenuator control code to the attenuator so as to adjust the attenuation of the attenuator.
Optionally, predicting a first parasitic amplitude modulation prediction value of a maximum phase shift state of the phase shifter at the temperature according to a first mathematical model comprises:
obtaining a parasitic phase modulation value A of the maximum phase shift state of the phase shifter at the first temperature 1 Parasitic phase modulation value A of maximum phase shift state at second temperature 2 ；
Parasitic modulation value A based on maximum phase shift state at the first temperature 1 A parasitic modulation value A of the maximum phase shift state at the second temperature 2 And predicting a first parasitic amplitude modulation predicted value of the maximum phase shift state at the current temperature by the first mathematical model.
Optionally, the first temperature is the lowest temperature T min The second temperature is the highest temperature T max 。
Optionally, obtaining the parasitic modulation value A of the maximum phase shift state at the first temperature by using an empirical value or a simulated value or an actual measured value 1 And the parasitic modulation value A of the maximum phase shift state at the second temperature 2 。
Optionally, the first parasitic amplitude modulation prediction value is
Optionally, the second parasitic amplitude modulation prediction value isWherein T is the current temperature value, N is the phase shifter control bit number, and i is the phase shift control state.
Optionally, before generating the attenuator control code, the method further includes: and automatically rounding the second parasitic amplitude modulation predicted value according to the step to determine the step multiple.
Optionally, a current temperature value of the phase shifter is determined using a temperature sensor.
The embodiment of the invention discloses a T/R component of a radio frequency system, which comprises a phase shifter and an attenuator; the T/R assembly further comprises a control unit configured to perform the above-described method of compensating for spurious phase modulation of an attenuator to control the phase shifting of the phase shifter to cancel spurious phase modulation of the attenuator.
An embodiment of the invention discloses a control unit storing a processor and a memory of executable instructions configured to execute the instructions to implement the method of compensating for spurious amplitude modulation of a phase shifter described above.
The embodiment of the invention discloses a computer readable storage medium, wherein at least one computer instruction is stored in the computer readable storage medium, and the at least one instruction is loaded and executed by a processor to realize the method for compensating the parasitic amplitude modulation of the phase shifter.
Embodiments of the present invention disclose a computer program product comprising computer instructions which, when executed, implement the above-described method of compensating for spurious amplitude modulation of a phase shifter.
Compared with the prior art, the embodiment of the invention has the following effects:
the invention can compensate the parasitic amplitude modulation of the phase shifter through the attenuation characteristic of the attenuator, predicts the parasitic amplitude modulation under the current control state and temperature, determines the parasitic amplitude modulation value to be compensated according to a mathematical model, outputs the attenuator control code for adjusting the parasitic amplitude modulation to the attenuator in a link system, does not need an additional attenuation unit, can eliminate the parasitic amplitude modulation, and effectively reduces the area and the cost of a chip.
Drawings
FIG. 1 is a schematic diagram of a prior art method of compensating for phase-shifting attenuation;
FIG. 2a is a flow chart of a method of compensating for spurious phase modulation of an attenuator in accordance with an embodiment of the present invention;
FIG. 2b is a schematic diagram of spurious phase modulation prediction of an attenuator in accordance with an embodiment of the present invention;
FIG. 3a is a flow chart of a method of compensating for parasitic amplitude modulation of a phase shifter in accordance with an embodiment of the present invention;
FIG. 3b is a schematic diagram of parasitic amplitude modulation prediction of a phase shifter according to an embodiment of the present invention;
FIG. 4 is a block diagram of a radio frequency system T/R assembly according to an embodiment of the present invention;
fig. 5 is a block diagram of a control unit according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to specific examples and figures. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. Furthermore, for convenience of description, only some, but not all, structures or processes related to the present invention are shown in the drawings. It should be noted that in the present specification, like reference numerals and letters denote like items in the following drawings.
It will be understood that, although the terms "first," "second," etc. may be used herein to describe various features, these features should not be limited by these terms. These terms are used merely for distinguishing and are not to be construed as indicating or implying relative importance. For example, a first feature may be referred to as a second feature, and similarly a second feature may be referred to as a first feature, without departing from the scope of the example embodiments.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a prior art method of compensating for phase-shifting attenuation.
As shown in fig. 1, the existing compensation scheme of the phase-shifting attenuation requires the coordination of the control unit 110, the phase shifter 120, the redundant attenuator 130 and the attenuator 140.
In the prior art, the phase shifter and the attenuator are generally controlled independently of each other, and although the control circuit is easy to realize, due to the physical characteristics of the phase shifter and the attenuator, larger parasitic amplitude modulation and parasitic phase modulation can be generated in a link.
For the solution of larger parasitic amplitude modulation, a redundant attenuator 130 is generally built in the phase shifter 120, the control unit 110 receives the phase shifter control signal, determines the parasitic amplitude modulation to be compensated, converts the parasitic amplitude modulation into a binary code form and transmits the binary code form to the redundant attenuator 130, and the gain of different phase shifting states is finely adjusted through the redundant attenuator which is arranged in the phase shifter 120 in advance, so that the effect of compensating the parasitic amplitude modulation is achieved.
For the solution of larger spurious phase modulation, a redundant phase shifter needs to be arranged in the attenuator 140, and the control unit 110 receives the attenuator control signal, determines the spurious phase modulation to be compensated, converts the spurious phase modulation into a binary code form and transmits the binary code form to the redundant phase shifter. However, no redundant phase shifter is added in the attenuator 140, because the phase shifter has a large layout area and is high in cost.
The redundant attenuator is added in the phase shifter in the prior art, so that the area of the phase shifter is increased, the redundant phase shifter cannot be added in the attenuator, and the layout area is large if the redundant phase shifter needs to be increased.
To solve the above problems, the present invention proposes a method of compensating for spurious phase modulation of an attenuator, the attenuator being in communication with a phase shifter, the phase shifter compensating for phase modulation of a signal from the attenuator, comprising: determining a current temperature value of the attenuator; predicting a first parasitic phase modulation predicted value of the attenuator in a maximum attenuation state at the current temperature according to a first mathematical model; determining the current attenuation control state of the attenuator; determining a second parasitic phase modulation predicted value of the attenuator in the current temperature and current attenuation control state according to a second mathematical model and the first parasitic phase modulation predicted value; generating a phase shifter control code based on the second spurious phase modulation prediction value, and transmitting the phase shifter control code to the phase shifter to adjust the phase shift amount of the phase shifter.
The invention also proposes a method of compensating for parasitic amplitude modulation of a phase shifter in communication with an attenuator that amplitude-modulates a signal from the phase shifter, comprising: determining a current temperature value of the phase shifter; predicting a first parasitic amplitude modulation predicted value of the maximum phase shift state of the phase shifter at the current temperature according to a first mathematical model; determining the current phase shift control state of the phase shifter; determining a second parasitic amplitude modulation predicted value of the phase shifter in the current temperature and current phase shift control state according to a second mathematical model and the first parasitic amplitude modulation predicted value; and generating an attenuator control code based on the second parasitic amplitude modulation predicted value, and sending the attenuator control code to the attenuator so as to adjust the attenuation of the attenuator.
The parasitic phase modulation of the attenuator is compensated by the phase shifting characteristic of the phase shifter, the parasitic amplitude modulation of the phase shifter is compensated by the attenuation characteristic of the attenuator, and a signal with small parasitic amplitude modulation/phase modulation is output in a link system. Therefore, an additional attenuation phase shift unit is not needed, the chip area is small, the cost can be reduced, and meanwhile, the parasitic amplitude modulation and parasitic phase modulation of a link system are improved.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
This embodiment is a method of compensating for spurious phase modulation of an attenuator.
According to the characteristics of the attenuator, the phase information of the attenuator control signal input into the attenuator in different attenuation states can change, namely parasitic phase modulation is generated, so that the parasitic phase modulation of the attenuator needs to be compensated to output a compensated phase shifter control signal, the parasitic phase modulation is eliminated, and the phase shifter can compensate the parasitic phase modulation of the attenuator.
The parasitic phase modulation is compensated by the phase shifter, and the phase shift precision of the phase shifter needs to be considered, wherein the phase shift precision refers to the minimum phase shift quantity which can be realized by the phase shifter, and the phase shift precision is related to the number of stepping bits for the digital phase shifter. The usual phase shifting accuracy is 22.5 °, 11.25 ° and 5.625 °, and the corresponding phase shifter bit numbers are 4 bits, 5 bits and 6 bits, respectively. In one example, a 6-bit phase shifter, a complete circuit is formed by sequentially connecting 6 phase shifting units, and each of the different phase shifting units can generate a desired phase. By switching the control voltage of the switch in each phase shifting circuit, if the phase shifter is realized within the period of 0-360 degrees, the stepping value is 5.625 degrees, and 2 degrees can be reached 6 Different phases. The phase shift ranges commonly used in current phase shifters are 0-180 ° and 0-360 °.
A method of compensating for spurious phase modulation of an attenuator according to the present invention will be described with reference to fig. 2 and 4.
Fig. 2a is a flow chart of a method of compensating for spurious phase modulation of an attenuator according to an embodiment of the present invention, as shown in fig. 2a, and referring to fig. 4 in combination, the method of compensating for spurious phase modulation of an attenuator of the present invention requires the cooperation of a control unit 410, a phase shifter 420 and an attenuator 430.
By predicting the spurious phase modulation of the attenuator 430, then determining the phase shift amount to be compensated, determining the final phase shift amount according to the phase shift amount to be compensated, inputting the binary phase shifter control code corresponding to the final phase shift amount into the phase shifter 420 communicated with the attenuator 430, and shifting the phase of the signal output by the attenuator 430 by the phase shifter 420, wherein the spurious phase modulation is considered by the phase shifter 420, so that the spurious phase modulation is compensated by the final phase shift, and finally the phase shifter 420 outputs the adjusted radio frequency signal.
Referring to fig. 2, a method of compensating for spurious phase modulation of an attenuator according to an embodiment of the present invention includes:
step S100: determining a current temperature value of the attenuator 430;
As one embodiment, a temperature sensor is utilized to determine the current temperature value of the attenuator 430.
For compensating for spurious phase modulation of the attenuator 430, the control unit 410 generates a control code for compensating the phase shifter, and the control unit 410 may receive a signal from the attenuator 430 and a current temperature value signal of the attenuator 430, wherein the signal needs to be binary converted from a decimal value.
The temperature is one of the bases for influencing the judgment of the predicted value of the parasitic phase modulation, and the parasitic phase modulation of the maximum attenuation state at different temperatures is different.
Referring to fig. 2b, in one example, maximum spurious phase modulation occurs at full attenuation, the maximum spurious phase modulation is affected by temperature, the spurious phase modulation value of the maximum attenuation state at a minimum temperature of-40 ℃ is greater than the spurious phase modulation value of the maximum attenuation state at a temperature of 20 ℃, and the spurious phase modulation value of the maximum attenuation state at a minimum temperature of-40 ℃ is much greater than the spurious phase modulation value of the maximum attenuation state at a temperature of 105 ℃, so that the maximum spurious phase modulation is achieved at a minimum temperature of-40 ℃.
Step S200: the first spurious phasing prediction of the maximum attenuation state of attenuator 430 at the current temperature is predicted based on the first mathematical model.
Specifically, the prediction method includes: obtaining a parasitic phase modulation value θ for a maximum attenuation state of the attenuator 430 at a first temperature 1 Parasitic phase modulation value theta of maximum attenuation state at second temperature 2 The method comprises the steps of carrying out a first treatment on the surface of the Parasitic phase modulation value theta based on maximum attenuation state at first temperature 1 Parasitic phase modulation value theta of maximum attenuation state at second temperature 2 And predicting a first parasitic phase modulation predicted value of the maximum attenuation state at the current temperature by the first mathematical model.
As one embodiment, the first temperature is the lowest temperature T min The second temperature is the highest temperature T max 。
As an embodiment, use is made of empirical or simulated values or actualityObtaining parasitic phase modulation value theta of maximum attenuation state at first temperature by measuring value 1 And a parasitic phase modulation value θ of the maximum attenuation state at the second temperature 2 。
As one embodiment, the first mathematical model is a linear interpolation.
When the first mathematical model is linear interpolation, the first parasitic phase modulation predicted value isWherein T is the current temperature value, and N is the attenuator control bit number; referring to FIG. 2b, in the above example, the operating temperature, the minimum operating temperature T, of the 6Bit attenuator min At-40 ℃ and maximum working temperature T max 105 ℃, the current measured temperature T of the attenuator is 20 ℃, and theta 1 Represents the parasitic phase modulation value, theta, of the attenuator in the maximum attenuation state at-40 DEG C 2 Indicating the spurious phase modulation value of the attenuator at 105 c at the maximum attenuation state.
Step S300: the current attenuation control state of the attenuator 430 is determined.
The amount of attenuation of the digitally controlled attenuator depends on the control signal.
Physically, the same instruction and the phase shifter have only one state at the same time, and different control states can be formed through different control under the actual control of a person skilled in the art, and the phase shift is performed to any specific phase shift quantity based on a stepping value in the phase shift range.
In one example, a 6Bit phase shifter has a 64 Bit state with a step value of 5.625 degrees, a phase shift corresponding to state 1 of 5.625 degrees, and a phase shift corresponding to state 31 of 174.375 degrees.
Step S400: a second spurious phasing prediction value for the current temperature and current attenuation control state of attenuator 430 is determined based on the second mathematical model and the first spurious phasing prediction value.
As one embodiment, the second mathematical model is a linear interpolation.
When the second mathematical model is linear interpolation, the second parasitic phase modulation prediction value is Wherein T is the current temperature value, N is the attenuator control bit number, and i is the attenuation control state.
Step S500: a phase shifter control code is generated based on the second spurious phase modulation prediction value and is sent to the phase shifter 420 to adjust the phase shift amount of the phase shifter to eliminate spurious phase modulation of the attenuator. It should be noted that the cancellation of the present invention does not represent a complete cancellation, but rather a reduction of spurious phase modulation relative to the prior art.
As one embodiment, the step multiple is determined from the step auto-rounding for the second spurious phasing prediction.
The spurious phase modulation value of the attenuator 430 currently required to be compensated is determined according to the step automatic rounding method based on the second spurious phase modulation predicted value, the phase shifter control code is determined according to the compensation value, the phase shifter control code is a binary signal, and finally the adjusted phase shifter control code is input to the phase shifter 420, and the phase information is adjusted, namely phase modulation, so that the spurious phase modulation is eliminated.
The step auto-rounding method for determining the step multiple of the phasor may include rounding or sorting the mathematical model of the median from the integer differences.
In one example, a 7Bit phase shifter has a step value of 360 DEG/2 7 The minimum phase shift quantity is 2.8125 degrees, when the predicted value of the parasitic phase modulation of the attenuator is 3 degrees according to automatic rounding, the stepping multiple is determined to be 1 by using stepping automatic rounding, and the phase shift quantity which needs to be actually compensated by the phase shifter is 2.8125 degrees; when the predicted value of the parasitic phase modulation of the attenuator is 5 degrees, the stepping multiple is determined to be 2 by utilizing stepping automatic rounding, and the phase shift quantity which needs to be actually compensated by the phase shifter is 5.625 degrees; when the predicted value of the parasitic phase modulation of the attenuator is 6 degrees, the stepping multiple is determined to be 2 by utilizing stepping automatic rounding, and the phase shift quantity which needs to be actually compensated by the phase shifter is 5.625 degrees; automatic rounding and determination using stepping when the predicted value of spurious phase modulation of attenuator is 11 DEG The fixed step multiple is 4 and the phase shifter needs to actually compensate for the phase shift amount of 11.25 °.
And determining the phase shift amount to be compensated by the phase shifter according to the second parasitic phase modulation predicted value, thereby determining the phase shifter control code to be input, wherein the phase shifter control code is a binary code.
In an example, a 6Bit phase shifter is used, a user needs to shift a phase by 90 ° system, an input attenuator control signal is a binary code 010000, through prediction of parasitic phase modulation by a first mathematical model and a second mathematical model, the parasitic phase modulation of the predicted attenuator is 6 °, a control unit determines that the final phase shift amount to be compensated is 5.625 °, a step multiple is 1, and then a binary value corresponding to the phase shifter control code which should be actually input into the phase shifter is 001111, that is, the final phase shifter phase shift amount is 84.375 °.
In this embodiment, the execution sequence of the steps is not strictly in the illustrated order, for example, the step S100 and the step S300 may be performed simultaneously, or the step S300 may be performed first, and the order of the steps is based on the achievement of the object of the present invention.
Example 2
According to the characteristics of the phase shifter, amplitude information of a phase shifter control signal input to the phase shifter in different phase shift states changes, namely parasitic amplitude modulation is generated, the parasitic amplitude modulation of the phase shifter needs to be compensated, so that a compensated attenuator control signal is output, the parasitic amplitude modulation is eliminated, and the attenuator can compensate the parasitic amplitude modulation of the phase shifter.
Fig. 3a is a flow chart of a method of compensating for parasitic amplitude modulation of a phase shifter according to an embodiment of the present invention, with reference to fig. 3 and 4 in combination. The invention relates to a compensating method of parasitic amplitude modulation of a phase shifter, which comprises the steps of firstly predicting the parasitic amplitude modulation of the phase shifter 420, then determining the attenuation amount to be compensated, determining the final attenuation amount according to the attenuation amount to be compensated, inputting a binary attenuator control code corresponding to the final attenuation amount into an attenuator 430 communicated with the phase shifter 420, and carrying out amplitude modulation on a signal output by the phase shifter 420 by the attenuator 430.
Referring to fig. 3a, a method for compensating for parasitic amplitude modulation of a specific phase shifter includes:
step S600: a current temperature value of the phase shifter 420 is determined.
As one embodiment, a temperature sensor is utilized to determine the current temperature value of the phase shifter 420.
For compensating for the spurious amplitude modulation of the phase shifter 420, the control unit 410 generates a control code of the compensated attenuator and finally inputs the adjusted attenuator control code to the attenuator, performing an adjustment of the amplitude information, i.e. the amplitude modulation, which has eliminated the spurious amplitude modulation. The control unit may receive a signal from the phase shifter 420 and a current temperature value signal of the phase shifter 420, wherein the signal needs to be binary converted by a decimal value.
The temperature is one of the bases for influencing the judgment of the predictive value of the parasitic amplitude modulation, and the maximum phase shift state of the parasitic amplitude modulation at different temperatures is different.
Referring to fig. 3b, in one example, maximum spurious amplitude modulation occurs at full phase shift, the maximum spurious amplitude modulation is affected by temperature, the spurious amplitude modulation of the maximum phase shift state at a minimum temperature of-40 ℃ is less than the spurious amplitude modulation of the maximum phase shift state at a temperature of 20 ℃, and the spurious amplitude modulation of the maximum phase shift state at a minimum temperature of-40 ℃ is in turn much less than the spurious amplitude modulation of the maximum phase shift state at a temperature of 105 ℃, so that the maximum spurious amplitude modulation is achieved at a temperature of 105 ℃.
Step S700: a first parasitic amplitude modulation prediction value for the maximum phase shift state of the phase shifter 420 at the current temperature is predicted based on the first mathematical model.
Specifically, the prediction method includes: obtaining a parasitic phase modulation value A of the maximum phase shift state of the phase shifter 420 at the first temperature 1 Parasitic phase modulation value A of maximum phase shift state at second temperature 2 The method comprises the steps of carrying out a first treatment on the surface of the Parasitic modulation value A based on maximum phase shift state at first temperature 1 Parasitic modulation value A of maximum phase shift state at second temperature 2 First mathematical modelAnd predicting a first parasitic amplitude modulation predicted value of the maximum phase shift state at the current temperature.
As one embodiment, the first temperature is the lowest temperature T min The second temperature is the highest temperature T max 。
As one embodiment, the parasitic modulation value A of the maximum phase shift state at the first temperature is obtained by using an empirical value or an imitation value or an actual measurement value 1 And the parasitic modulation value A of the maximum phase shift state at the second temperature 2 。
As one embodiment, the first mathematical model is a linear interpolation.
When the first mathematical model is linear interpolation, the first parasitic amplitude modulation predicted value isWherein T is the current temperature value, N is the control Bit number of the phase shifter, and in the above example, the 6Bit phase shifter T min at-40deg.C, T max 105 ℃, the current measured temperature T of the attenuator is 20 ℃, A 1 Representing the parasitic modulation value of the phase shifter at the maximum phase shift state of minus 40 ℃, A 2 Representing the parasitic amplitude of the phase shifter at a maximum phase shift state of 105 c.
Step S800: the current phase shift control state of phase shifter 420 is determined.
The phasor of the digitally controlled phase shifter depends on the control signal.
In a physical sense, the same instruction attenuator has only one state at the same time, and different control states can be formed through different controls under the actual control of a person skilled in the art, and the attenuation is carried out to any specific attenuation amount based on a stepping value in the working frequency band range of the attenuator.
In one example, a 6Bit attenuator has a 64 Bit state with a step value of 7.5dB for attenuation of 0.5dB for attenuation of 1 st state and 7.5dB for attenuation of 15 th state.
Step S900: and determining a second parasitic amplitude modulation predicted value of the current temperature and the current phase shift control state of the phase shifter 420 according to the second mathematical model and the first parasitic amplitude modulation predicted value.
As one embodiment, the second mathematical model is a linear interpolation.
When the second mathematical model is linear interpolation, the second parasitic amplitude modulation prediction value is Wherein T is the current temperature value, N is the control bit number of the phase shifter, and i is the phase shift control state.
Step S1000: an attenuator control code is generated based on the second parasitic amplitude modulation predictor and sent to the attenuator 430 to adjust the amplitude information of the phase shifter 420 to eliminate the parasitic amplitude modulation.
As an embodiment, the step multiple is determined from the step auto-rounding for the second parasitic amplitude modulation predictor.
The spurious amplitude modulation value of the phase shifter 420 which is required to be compensated currently is determined according to the stepping automatic rounding method based on the second spurious amplitude modulation predicted value, the attenuator control code is determined according to the compensation value, the attenuator control code is a binary signal, and finally the adjusted attenuator control code is input to the attenuator 430 to adjust amplitude information, namely amplitude modulation, and the amplitude information after adjustment eliminates the spurious amplitude modulation.
The step auto-rounding method for determining the step multiple of the delta attenuation may include rounding or sorting the mathematical model of the median from the integer differences.
In one example, a Bit 6Bit attenuator, the system is a 10dB attenuation system, and when the parasitic amplitude modulation of the phase shifter is 0.5dB, the system attenuates to 9.5dB.
Based on the second parasitic amplitude modulation prediction value, the amount of attenuation that the attenuator 430 needs to compensate for is determined, thereby determining the attenuator control code that needs to be input, which should be a binary code.
In an example, a 6Bit attenuator is used, a user needs to attenuate a system with 10dB, an input control signal of a phase shifter is a binary code 010100, the parasitic amplitude modulation of the phase shifter is predicted to be 0.5dB through the prediction of a first mathematical model and a second mathematical model, the final parasitic amplitude modulation to be compensated is determined to be 0.5dB, and a stepping multiple is determined by stepping automatic rounding, so that a binary value corresponding to the control code of the attenuator which is actually required to be input is 010011, namely the final attenuation is 9.5dB.
In this embodiment, the execution sequence of the steps is not strictly in the illustrated order, for example, the step S600 and the step S800 may be performed simultaneously, or the step S800 may be performed first, and the order of the steps is based on the order in which the objects of the present invention can be achieved.
Example 3
Fig. 4 is a block diagram of a radio frequency system T/R assembly according to an embodiment of the present invention.
As shown in fig. 4, the present invention provides a T/R assembly of a radio frequency system, which includes a phase shifter 420, an attenuator 430, and a control unit 410. The control unit generates a phase shifter control code and an attenuator control code with compensation information based on the phase shifter control signal of the phase shifter 420 or the attenuator control signal of the attenuator 430, respectively, and the current operating temperature.
The phase shifter 420 is mutually communicated with the attenuator 430, and phase information of the attenuator control signal input to the attenuator in different attenuation states changes, namely parasitic phase modulation is generated, so that the parasitic phase modulation of the attenuator needs to be compensated to output a compensated phase shifter control signal, so that the parasitic phase modulation is eliminated, and the method specifically comprises the following steps: determining a current temperature value T of the attenuator 430; predicting a first spurious phasing prediction of a maximum attenuation state of attenuator 430 at a current temperature T based on a first mathematical modelWherein T is max At the highest working temperature, T min At the lowest working temperature, theta 1 Representing parasitic phase modulation value, θ, of the attenuator at maximum attenuation state at minimum operating temperature 2 Representing parasitic phase modulation values of the attenuator in a maximum attenuation state of the maximum working temperature; determining a current attenuation control state i of the attenuator 430; according to a second mathematical model And a first parasitic phase modulation prediction value, determining a second parasitic phase modulation prediction value for attenuator 430 at current temperature T and current attenuation control state iWhere N is the number of control bits of the attenuator 430; a phase shifter control code is generated based on the second spurious phase modulation prediction value and is transmitted to the phase shifter 420 to adjust the phase shift amount of the phase shifter 420.
The attenuator 430 is mutually communicated with the phase shifter 420, and according to the characteristics of the phase shifter, the amplitude information of the phase shifter control signal input into the phase shifter in different phase shift states can change, namely parasitic amplitude modulation is generated, and the parasitic amplitude modulation of the phase shifter needs to be compensated to output the compensated attenuator control signal so as to eliminate the parasitic amplitude modulation, which specifically comprises: determining a current temperature value T of the phase shifter 420; predicting a first parasitic amplitude modulation prediction value of the maximum phase shift state of the phase shifter at the current temperature T according to a first mathematical modelWherein T is max At the highest working temperature, T min At the lowest working temperature, A 1 Representing the parasitic modulation value of the attenuator in the maximum phase shift state of the lowest working temperature, A 2 Representing the parasitic modulation value of the phase shifter in the maximum phase shifting state of the highest working temperature; determining the current phase-shifting control state i of the phase shifter; determining a second parasitic amplitude modulation predictor for the current temperature T and the current phase shift control state i of the phase shifter 420 based on the second mathematical model and the first parasitic amplitude modulation predictor Where N is the number of control bits of the phase shifter 420; an attenuator control code is generated based on the second parasitic amplitude modulation prediction value and is transmitted to the attenuator 430 to adjust the attenuation of the attenuator 430.
The present embodiment corresponds to the foregoing embodiment, and may be implemented in cooperation with the foregoing embodiment. The related technical details mentioned in the foregoing embodiment are still valid in the present embodiment. Accordingly, the related technical details mentioned in the present embodiment can also be applied to the foregoing embodiments.
Fig. 5 is a block diagram of a control unit embodying an embodiment of the present invention.
As shown in fig. 5, the control unit 500 may include one or more processors 502, system control logic 508 coupled to at least one of the processors 502, system memory 504 coupled to the system control logic 508, non-volatile memory (NVM) 506 coupled to the system control logic 508, and a network interface 510 coupled to the system control logic 508.
The processor 502 may include one or more single-core or multi-core processors. The processor 502 may include any combination of general-purpose and special-purpose processors (e.g., graphics processor, application processor, baseband processor, etc.). In an embodiment of the invention, the processor 502 may be configured to perform a method of compensating for spurious phase modulation of an attenuator according to the method of compensating for spurious phase modulation of an attenuator as shown in fig. 2a and a method of compensating for spurious amplitude modulation of a phase shifter as shown in fig. 3 a.
In some embodiments, system control logic 508 may include any suitable interface controller to provide any suitable interface to at least one of processors 502 and/or any suitable device or component in communication with system control logic 508.
In some embodiments, system control logic 508 may include one or more memory controllers to provide an interface to system memory 504. The system memory 504 may be used for loading and storing data and/or instructions. The system memory 504 of the control unit 500 may include any suitable volatile memory in some embodiments, such as a suitable Dynamic Random Access Memory (DRAM).
The non-volatile memory 506 may include one or more tangible, non-transitory computer-readable media for storing data and/or instructions. In some embodiments, the nonvolatile memory 506 may include any suitable nonvolatile memory such as flash memory and/or any suitable nonvolatile storage device, for example at least one of a HDD (Hard Disk Drive), a CD (Compact Disc) Drive, a DVD (Digital Versatile Disc ) Drive.
The non-volatile memory 506 may comprise a portion of a memory resource installed on the apparatus of the control unit 500, or it may be accessed by, but not necessarily part of, the device. For example, the non-volatile memory 506 may be accessed over a network via the network interface 510.
In particular, the system memory 504 and the nonvolatile storage 506 may each include: a temporary copy and a permanent copy of instruction 520. The instructions 520 may include: instructions that when executed by at least one of the processors 502 cause the control unit 500 to implement a method of compensating for spurious phase modulation of an attenuator as shown in fig. 2a and a method of compensating for spurious amplitude modulation of a phase shifter as shown in fig. 3 a. In some embodiments, instructions 520, hardware, firmware, and/or software components thereof may additionally/alternatively be disposed in system control logic 508, network interface 510, and/or processor 502.
The network interface 510 may include a transceiver to provide a radio interface for the control unit 500 to communicate with any other suitable device (e.g., front end module, antenna, etc.) over one or more networks. In some embodiments, the network interface 510 may be integrated with other components of the control unit 500. For example, network interface 510 may be integrated with at least one of processor 502, system memory 504, NVM 506, and a firmware device (not shown) having instructions that, when executed by at least one of processor 502, control unit 500 implements one or more of the various embodiments shown in fig. 2a and 3 a.
The network interface 510 may further include any suitable hardware and/or firmware to provide a multiple-input multiple-output radio interface. For example, network interface 510 may be a network adapter, a wireless network adapter, a telephone modem, and/or a wireless modem.
In one embodiment, at least one of the processors 502 may be packaged together with one or more controllers for system control logic 508 to form a System In Package (SiP). In one embodiment, at least one of the processors 502 may be integrated on the same die as one or more controllers for the system control logic 508 to form a system on a chip (SoC).
The control unit 500 may further include: input/output (I/O) devices 512 are connected to the system control logic 508. The I/O device 512 may include a user interface enabling a user to interact with the control unit 500; the design of the peripheral component interface enables the peripheral components to also interact with the control unit 500. In some embodiments, the control unit 500 further comprises a sensor for determining at least one of environmental conditions and location information related to the control unit 500.
In some embodiments, input/output (I/O) devices 512 may include, but are not limited to, a display (e.g., a liquid crystal display, a touch screen display, etc.), speakers, a microphone, one or more cameras (e.g., still image cameras and/or video cameras), a flashlight (e.g., light emitting diode flash), and a keyboard.
In some embodiments, the peripheral component interface may include, but is not limited to, a non-volatile memory port, an audio jack, and a power interface.
It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the control unit 500. In other embodiments of the application, the control unit 500 may include more or less components than illustrated, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Program code may be applied to input instructions to perform the functions described herein and generate output information. The output information may be applied to one or more output devices in a known manner. For purposes of this disclosure, a system for processing instructions including processor 502 includes any system having a processor such as a Digital Signal Processor (DSP), microcontroller, application Specific Integrated Circuit (ASIC), or microprocessor.
The program code may be implemented in a high level procedural or object oriented programming language to communicate with a processing system. Program code may also be implemented in assembly or machine language, if desired. Indeed, the mechanisms described in the present application are not limited in scope by any particular programming language. In either case, the language may be a compiled or interpreted language.
According to one embodiment of the present invention, there is also provided a computer readable storage medium having stored therein at least one computer instruction loaded and executed by a processor to implement a method of compensating for spurious phase modulation of an attenuator and a method of compensating for spurious amplitude modulation of a phase shifter.
According to an embodiment of the invention, a computer program product is also presented, comprising computer instructions which, when executed, implement the aforementioned method of compensating for spurious phase modulation of an attenuator and method of compensating for spurious amplitude modulation of a phase shifter.
Illustrative embodiments of the invention include, but are not limited to, a method of compensating an attenuator, a phase shifter, a T/R assembly, a control unit, a medium, a program product.
Various aspects of the illustrative embodiments will be described using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. However, it will be apparent to those skilled in the art that some alternative embodiments may be practiced using the features described in part. For purposes of explanation, specific numbers and configurations are set forth in order to provide a more thorough understanding of the illustrative embodiments. However, it will be apparent to one skilled in the art that the alternative embodiments may be practiced without the specific details. In some other instances, well-known features are omitted or simplified in order not to obscure the illustrative embodiments of the invention.
Furthermore, various operations will be described as multiple discrete operations, in a manner that is most helpful in understanding the illustrative embodiments; however, the order of description should not be construed as to imply that these operations are necessarily order dependent, and that many of the operations be performed in parallel, concurrently or with other operations. Furthermore, the order of the operations may also be rearranged. When the described operations are completed, the process may be terminated, but may also have additional steps not included in the figures. The processes may correspond to methods, functions, procedures, subroutines, and the like.
References in the specification to "one example", "in an example", "one embodiment", "an implementation", etc., indicate that the embodiment described may include a particular feature, structure, or property, but every embodiment may or may not necessarily include the particular feature, structure, or property. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature is described in connection with a particular embodiment, it is within the knowledge of one skilled in the art to affect such feature in connection with other embodiments, whether or not such embodiment is explicitly described.
The terms "comprising," "having," and "including" are synonymous, unless the context dictates otherwise. The phrase "a and/or B" means "(a), (B) or (a and B)".
As used herein, the term "module" may refer to, be part of, or include: memory (shared, dedicated, or group) for running one or more software or firmware programs, an Application Specific Integrated Circuit (ASIC), an electronic circuit and/or processor (shared, dedicated, or group), a combinational logic circuit, and/or other suitable components that provide the described functionality.
In the drawings, some structural or methodological features may be shown in a particular arrangement and/or order. However, it should be understood that such a particular arrangement and/or ordering is not required. Rather, in some embodiments, these features may be described in a different manner and/or order than shown in the illustrative figures. Additionally, the inclusion of a structural or methodological feature in a particular drawing does not imply that all embodiments need to include such feature, and in some embodiments may not be included or may be combined with other features.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Claims (22)
1. A method of compensating for spurious phase modulation of an attenuator in communication with a phase shifter that phase shifts a signal from the attenuator, comprising:
determining a current temperature value of the attenuator;
establishing a first mathematical model based on the temperature value and the spurious phase modulation value of the attenuator;
predicting a first parasitic phase modulation predicted value of the attenuator in a maximum attenuation state at the current temperature according to the first mathematical model;
determining the current attenuation control state of the attenuator;
establishing a second mathematical model based on the temperature value, the spurious phase modulation value, the attenuation control state and an attenuator control bit number of the attenuator;
determining a second parasitic phase modulation predicted value of the attenuator in the current temperature and current attenuation control state according to the second mathematical model and the first parasitic phase modulation predicted value, wherein the first mathematical model and the second mathematical model are linear interpolation methods;
Generating a phase shifter control code based on the second spurious phase modulation prediction value, and transmitting the phase shifter control code to the phase shifter to adjust the phase shift amount of the phase shifter.
2. The method of compensating for spurious phase modulation of an attenuator of claim 1 wherein predicting a first spurious phase modulation prediction value for a maximum attenuation state of the attenuator at the temperature based on the first mathematical model comprises:
obtaining a parasitic phase modulation value theta of the maximum attenuation state of the attenuator at the first temperature 1 Second temperatureParasitic phase modulation value theta of maximum attenuation state under degree 2 ；
Parasitic phase modulation value θ based on the maximum attenuation state at the first temperature 1 Parasitic phase modulation value θ of maximum attenuation state at the second temperature 2 And predicting a first parasitic phase modulation predicted value of the maximum attenuation state at the current temperature by the first mathematical model.
3. A method of compensating for spurious phase modulation of an attenuator as in claim 2 wherein the first temperature is the lowest temperature T min The second temperature is the highest temperature T max 。
4. The method of compensating for spurious phase modulation of an attenuator of claim 2, wherein the spurious phase modulation value θ of the maximum attenuation state at the first temperature is obtained using empirical or simulated or measured values 1 And a parasitic phase modulation value θ of the maximum attenuation state at the second temperature 2 。
5. A method of compensating for spurious phase modulation of an attenuator as in claim 3 wherein the first spurious phase modulation prediction value is
6. A method of compensating for spurious phase modulation of an attenuator as in claim 5,
the second parasitic phase modulation predicted value isWherein, T is the current temperature value, N is the attenuator control bit number, and i is the attenuation control state.
7. The method of compensating for spurious phase modulation of an attenuator of claim 6, further comprising, prior to generating the phase shifter control code: and automatically rounding the second parasitic phase modulation predicted value according to the step to determine the step multiple.
8. The method of compensating for spurious phase modulation of an attenuator of claim 7 wherein the current temperature value of the attenuator is determined using a temperature sensor.
9. A T/R assembly for a radio frequency system, said T/R assembly comprising a phase shifter and an attenuator;
the T/R assembly further comprises a control unit configured to perform the method of compensating for spurious phase modulation of an attenuator of any of claims 1-8 to control the amount of phase shift of the phase shifter to cancel spurious phase modulation of the attenuator.
10. A control unit having stored thereon a processor and a memory of executable instructions, the processor being configured to execute the instructions to implement the method of compensating for spurious phase modulation of an attenuator according to any of claims 1-8.
11. A computer readable storage medium having stored therein at least one computer instruction that is loaded and executed by a processor to implement a method of compensating for spurious phase modulation of an attenuator according to any of claims 1 to 8.
12. A method of compensating for parasitic amplitude modulation of a phase shifter in communication with an attenuator that phase shifts a signal from the phase shifter, comprising:
determining a current temperature value of the phase shifter;
establishing a first mathematical model based on the temperature value and the parasitic modulation value of the phase shifter;
predicting a first parasitic amplitude modulation predicted value of the maximum phase shift state of the phase shifter at the current temperature according to the first mathematical model;
determining the current phase shift control state of the phase shifter;
establishing a second mathematical model based on the temperature value, the spurious modulation value, the phase shift control state and a phase shifter control bit number of the phase shifter;
Determining a second parasitic amplitude modulation predicted value of the phase shifter in the current temperature and current phase shift control state according to the second mathematical model and the first parasitic amplitude modulation predicted value, wherein the first mathematical model and the second mathematical model are linear interpolation methods;
and generating an attenuator control code based on the second parasitic amplitude modulation predicted value, and sending the attenuator control code to the attenuator so as to adjust the attenuation of the attenuator.
13. The method of compensating for parasitic amplitude modulation of a phase shifter of claim 12, wherein predicting a first predicted value of parasitic amplitude modulation of a maximum phase shift state of the phase shifter at the temperature based on a first mathematical model comprises:
obtaining a parasitic phase modulation value A of the maximum phase shift state of the phase shifter at the first temperature 1 Parasitic phase modulation value A of maximum phase shift state at second temperature 2 ；
Parasitic modulation value A based on maximum phase shift state at the first temperature 1 A parasitic modulation value A of the maximum phase shift state at the second temperature 2 And predicting a first parasitic amplitude modulation predicted value of the maximum phase shift state at the current temperature by the first mathematical model.
14. The method of compensating for parasitic amplitude modulation of a phase shifter of claim 13, wherein the first temperature is a minimum temperature T min The second temperature is the highest temperature T max 。
15. The method of compensating for parasitic amplitude modulation of a phase shifter of claim 13, wherein the maximum phase shift state at the first temperature is obtained using empirical or simulated or measured valuesParasitic modulation value A 1 And the parasitic modulation value A of the maximum phase shift state at the second temperature 2 。
16. The method of compensating for parasitic amplitude modulation of a phase shifter of claim 14, wherein the first parasitic amplitude modulation predictor is
17. The method of compensating for parasitic amplitude modulation of a phase shifter of claim 16,
the second parasitic amplitude modulation predicted value isWherein T is the current temperature value, N is the control bit number of the phase shifter, and i is the phase shift control state.
18. The method of compensating for parasitic amplitude modulation of a phase shifter of claim 17, further comprising, prior to generating the attenuator control code: and automatically rounding the second parasitic amplitude modulation predicted value according to the step to determine the step multiple.
19. The method of compensating for parasitic amplitude modulation of a phase shifter of claim 18, wherein a temperature sensor is utilized to determine a current temperature value of the phase shifter.
20. A T/R assembly for a radio frequency system, said T/R assembly comprising an attenuator and a phase shifter;
the T/R assembly further comprises a control unit configured to perform the method of compensating for parasitic amplitude modulation of the phase shifter of any one of claims 12-19 to control an amount of attenuation of the attenuator to cancel the parasitic amplitude modulation of the phase shifter.
21. A control unit, characterized in that the control unit stores a processor and a memory of executable instructions, the processor being configured to execute the instructions to implement the method of compensating for spurious amplitude modulation of a phase shifter according to any of claims 12-19.
22. A computer readable storage medium having stored therein at least one computer instruction that is loaded and executed by a processor to implement a method of compensating for spurious amplitude modulation of a phase shifter according to any of claims 12 to 19.
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