WO2018133055A1

WO2018133055A1 - Channel calibration method and device

Info

Publication number: WO2018133055A1
Application number: PCT/CN2017/072013
Authority: WO
Inventors: 骆彦行; �龙昊; 汤富生; 曾卓
Original assignee: 华为技术有限公司
Priority date: 2017-01-22
Filing date: 2017-01-22
Publication date: 2018-07-26
Also published as: CN109478937B; CN109478937A

Abstract

Provided in the present application are a channel calibration method and device, configured to perform channel calibration on a beam scanning device. The channel calibration device comprises: a calibration channel, and a first probe and a second probe connected to the calibration channel and placed on a sub-reflector. The calibration channel comprises a radio frequency receiver, a radio frequency transmitter, and a duplexer. The first probe directly faces a center of a square feed array. The second probe directly faces a center of an array formed by any 4 adjacent feed sources in the square feed array.

Description

Channel calibration method and device

Technical field

The present application relates to the field of communications technologies, and in particular, to a channel calibration method and apparatus.

Background technique

Beam-tunable antennas are generally classified into phased array antennas, reflective antennas, and phased array antennas + reflector antennas. For applications requiring higher antenna gain and lower cost, phased array antennas with fewer channels + Reflector antennas offer a compromise between cost and performance. A beam tunable antenna typically uses a plurality of antenna elements to form a feed array, each of which can independently control the phase of the signal, and the signals of the different antenna elements are spatially combined to form a scannable beam. To get a good antenna pattern, channel alignment must be performed for the phase mismatch of each antenna element.

In the prior art, a multi-channel calibration method suitable for a phased array antenna + a reflector antenna is to use self-coupling calibration, and a plurality of probes are placed around the antenna unit to detect the signal amplitude and phase of the self-coupled antenna unit. The calibration is performed in conjunction with the geometric arrangement of the antenna elements.

In the above calibration method, placing multiple probes around the antenna unit affects the tight arrangement of the antenna elements, resulting in unnecessary loss of antenna performance, and detecting the signal phase of the self-coupled antenna unit requires complex digital signal processing (Digital Signal Processing) , DSP) algorithm, and the calibration accuracy is not high.

Summary of the invention

The present application provides a channel calibration method and device, which does not need to obtain the signal phase of the antenna unit, and does not need to perform complicated calculation, and is easy to implement in the product.

In a first aspect, the present application provides a channel calibration apparatus for performing channel calibration on a beam scanning apparatus. The beam scanning apparatus has a primary reflective surface and a secondary reflective surface, four RF channels, and four of the four RF channels respectively. A group of adjustable phase shifters, a square feed array of 16 feeds, and four single-pole four-throw switches respectively disposed in four RF channels, the channel calibration device includes: a calibration channel and is connected to the calibration channel and placed in a first probe and a second probe on the secondary reflecting surface, the calibration channel includes a radio frequency receiver, a radio frequency transmitter and a duplexer, the first probe is facing the center of the square feed array, and the second probe is facing the square The center of the array of any four adjacent feeds of the feed array.

The first probe and the second probe can receive signals of the radio frequency channel by setting the calibration channel and the first probe and the second probe connected to the calibration channel and placed on the sub-reflecting surface, and can also transmit signals for the radio frequency Channel calibration, switching the calibration channel to the first probe or the second probe, adjusting the adjustable phase shifter of the RF channel, performing power-on emission calibration, power-on reception calibration, and real-time transmission of the beam scanning device according to a preset rule Calibration or real-time reception calibration eliminates the need to acquire the signal phase of the feed (antenna unit) and does not require complex calculations, making it easy to implement in the product.

In a possible design, the channel calibration device further includes a switch, one end of the switch is connected to the duplexer, and the other end is connected to the first probe and the second probe.

By switching the settings of the switch, the cost can be reduced.

In one possible design, the toggle switch is a single pole double throw switch.

In one possible design, the first probe is used to receive a signal transmitted by the feed or to transmit a calibration signal, and the second probe is used to receive a signal transmitted by the feed or to transmit a calibration signal.

In one possible design, it also includes:

a processor, configured to control connection of the calibration channel with the first probe or the second probe according to a preset rule, and control the four sets of adjustable phase shifters and the four single-pole four-throw switches Performing a power-on emission calibration, a power-on reception calibration, a real-time transmission calibration, or a real-time reception calibration on the beam scanning device, wherein the preset rule is: four feed phases symmetric with respect to the first probe are consistent in phase The power received by the first probe is the largest; the power received by the second probe is the largest when the four feeds are symmetric with respect to the second probe; and the first probe or the first When the four feeds of the two probes are in phase, the combined power of the signals received by the four RF channels is the largest.

In a second aspect, the present application provides a channel calibration method for use in a channel calibration apparatus according to any of the first aspect and the first aspect of the first aspect, the method comprising:

The power received by the second probe is the largest when the phase of the four feeds that are symmetric with respect to the first probe is the same, and the power of the first probe is the same when the four feeds are symmetric with respect to the second probe. The rule is to perform power-on calibration of the beam scanning device; when the real-time calibration trigger condition is triggered, according to the four feeds of the four corners of the square feed array, the first probe receives the highest power rule beam pair The scanning device performs real-time transmission calibration; wherein, when performing power-on emission calibration or real-time transmission calibration, the feed transmits a signal, and the first probe or the second probe receives the signal transmitted by the feed.

Adjusting the adjustable phase shifter of the RF channel by switching the calibration channel to the first probe or the second probe, and receiving the four RF channels according to the phase of the four feeds symmetric with respect to the first probe The rule that the signal synthesis power is the largest and the four feeds that are symmetric with respect to the second probe are in phase, and the combined power of the signals received by the four RF channels is the largest. The beam scanning device performs the power-on emission calibration and the real-time emission calibration without obtaining the signal. The signal phase of the feed (antenna unit) does not require complicated calculations and is easy to implement in the product.

In a possible design, when the power of the first probe is the same when the four feeds are symmetric with respect to the first probe, and the four feeds that are symmetric with respect to the second probe are the same, The rule that the maximum power received by the two probes is used to perform power-on calibration of the beam scanning device, which may be:

Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the first group of four feeds corresponding to the center of the square feed array, and adjusting the four corresponding to the first four feeds. The adjustable phase shifter on the RF channel maximizes the power received by the first probe, and obtains phase parameter values of the first group of adjustable phase shifters corresponding to the first group of four feeds;

Switching four single-pole four-throw switches to the second group of four feeds corresponding to the four corners of the square feed array, and adjusting the adjustable phase shifters on the four RF channels corresponding to the second group of four feeds The power received by one probe is the largest, and the phase parameter values of the second group of adjustable phase shifters corresponding to the second group of four feeds are obtained;

Switching four single-pole four-throw switches to the upper third group of four feeds in the middle two columns of the corresponding square feed array, and adjusting the adjustable phase shifters on the four RF channels corresponding to the third group of four feeds Maximizing the power received by the first probe, and obtaining phase parameter values of the third group of adjustable phase shifters corresponding to the third group of four feeds;

Switching four single-pole four-throw switches to the fourth and fourth groups of four feeds in the middle two rows of the corresponding square feed array, and adjusting the adjustable phase shifters on the four RF channels corresponding to the fourth group of four feeds The power received by the first probe is maximized, and phase parameter values of the fourth group of adjustable phase shifters corresponding to the fourth group of four feeds are obtained;

Switching the calibration channel to the second probe, switching the four single-pole four-throw switches to the fifth group of four feeds corresponding to the second probe in the corresponding square feed array, adjusting and the fifth group of four feeds The adjustable phase shifters on the four RF channels corresponding to the source maximize the power received by the second probe, and obtain the phase parameter values of the fifth group of adjustable phase shifters corresponding to the fifth group of four feeds;

According to the phase parameter values of the fifth group of adjustable phase shifters, the phase parameter values of the first group of adjustable phase shifters, the phase parameter values of the second group of adjustable phase shifters, and the third group of adjustable phase shifters are respectively The phase parameter values are corrected for the phase parameter values of the fourth set of adjustable phase shifters.

In a possible design, the beam scanning device is calibrated in real time according to the rule that the power of the first probe is the same when the four feeds of the four corners of the square feed array are in the same phase, which may be: calibration The channel is switched to connect the first probe, and the four single-pole four-throw switches are switched to the fourth group of four feeds corresponding to the four corners of the square feed array, and four RF channels corresponding to the sixth group of four feeds are adjusted. The adjustable phase shifter on the first probe maximizes the power received by the first probe, and obtains the phase parameter values of the sixth group of adjustable phase shifters corresponding to the fourth group of four feeds; The phase parameter value of the device gives the real-time correction value for each RF channel.

In a possible design, the real-time calibration trigger condition is triggered, which may be: reaching a preset periodic trigger time or a bit error rate drop.

In a third aspect, the present application provides a channel calibration method for use in a channel calibration apparatus according to any of the first aspect and the first aspect of the first aspect, the method comprising: symmetrical according to the first probe A regular beam-to-beam scanning device with the highest combined power of signals received by four RF channels and the same as the four feeds symmetrically with respect to the second probe when the phases of the feeds are the same. Performing power-on receiving calibration; when the real-time calibration trigger condition is triggered, the beam scanning device is real-time according to the rule that the four sources of the four feeds of the square feed array are in phase, and the combined power of the signals received by the four RF channels is the largest. Receiving calibration; wherein, when performing power-on reception calibration or real-time reception calibration, the first probe or the second probe issues a calibration signal, and the feed receives the calibration signal.

Adjusting the adjustable phase shifter of the RF channel by switching the calibration channel to the first probe or the second probe, and receiving the four RF channels according to the phase of the four feeds symmetric with respect to the first probe The rule that the signal synthesis power is the largest and the four feeds that are symmetric with respect to the second probe are in phase, and the combined power of the signals received by the four RF channels is the largest. The beam scanning device performs power-on reception calibration and real-time reception calibration, and does not need to acquire. The signal phase of the feed (antenna unit) does not require complicated calculations and is easy to implement in the product.

In a possible design, according to the four feeds that are symmetric with respect to the first probe, the signals received by the four RF channels have the largest combined power and the four feeds are symmetric with respect to the second probe. The rule that the combined power of the signals received by the four RF channels is the highest, and the power calibration of the beam scanning device is performed, which may be:

Exciting the first probe to emit a calibration signal;

Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the first group of four feeds corresponding to the center of the square feed array, and adjusting the four corresponding to the first four feeds. The adjustable phase shifter on the RF channel maximizes the combined power of the signals received by the four RF channels, and obtains the phase parameter values of the first group of adjustable phase shifters corresponding to the first group of four feeds;

Switching four single-pole four-throw switches to the second group of four feeds corresponding to the four corners of the square feed array, and adjusting the adjustable phase shifters on the four RF channels corresponding to the second group of four feeds. The combined power of the signals received by the RF channels is the largest, and the phase parameter values of the second group of adjustable phase shifters corresponding to the second group of four feeds are obtained;

Switching four single-pole four-throw switches to the upper third group of four feeds in the middle two columns of the corresponding square feed array. Adjusting the adjustable phase shifters on the four RF channels corresponding to the third group of four feeds, so that the combined power of the signals received by the four RF channels is the largest, and the third group corresponding to the third group of four feeds is obtained. Adjust the phase parameter value of the phase shifter;

Switching four single-pole four-throw switches to the fourth and fourth groups of four feeds in the middle two rows of the corresponding square feed array, and adjusting the adjustable phase shifters on the four RF channels corresponding to the fourth group of four feeds The combined power of the signals received by the four RF channels is maximized, and the phase parameter values of the fourth group of adjustable phase shifters corresponding to the fourth group of four feeds are obtained;

Switching the calibration channel to the second probe, exciting the second probe to issue a calibration signal, and switching the four single-pole four-throw switches to the fifth group of four corresponding symmetric square signals in the corresponding square feed array Feeding, adjusting the adjustable phase shifters on the four RF channels corresponding to the fifth group of four feeds, so that the combined power of the signals received by the four RF channels is the largest, and the first corresponding to the fifth group of four feeds is obtained. Phase parameter values of five groups of adjustable phase shifters;

In a possible design, the beam scanning device is subjected to real-time reception and calibration according to the rule that the four signals of the four feeds of the four corners of the square feed array are the same when the phase of the four RF channels is the same, which may be: Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the corresponding four groups of four feeds, and exciting the first probe to issue a calibration signal, adjusting the corresponding four groups of four feeds. The adjustable phase shifters on the four RF channels maximize the combined power of the signals received by the four RF channels, and obtain the phase parameter values of the sixth group of adjustable phase shifters corresponding to the four groups of four feeds; The phase parameter values of the six sets of adjustable phase shifters obtain real-time correction values for each RF channel.

DRAWINGS

1 is a schematic structural diagram of a beam scanning device to which the present application is applied;

2 is a schematic structural diagram of Embodiment 1 of a channel calibration apparatus provided by the present application;

FIG. 3 is a schematic flowchart diagram of Embodiment 1 of a channel calibration method provided by the present application;

FIG. 4 is a schematic flowchart diagram of Embodiment 2 of a channel calibration method provided by the present application.

detailed description

The technical solution of the present application is mainly applied to channel calibration of a beam tunable antenna. The channel calibration method and device proposed by the present application are used for channel calibration of a beam scanning device, that is, performing phase calibration of an antenna unit (feed), The signal phase of the antenna unit needs to be obtained, and no complicated calculation is needed, which is easy to implement in the product. The technical solution provided by the present application is described in detail below with reference to the accompanying drawings.

1 is a schematic structural diagram of a beam scanning device to which the present application is applied. As shown in FIG. 1 , the beam scanning device has a main reflecting surface 11 and a sub-reflecting surface 12 , four radio frequency channels, and four groups respectively disposed in four radio frequency channels. The adjustable phase shifter 13 and the square feed array 14 of 16 feeds and the four single-pole four-throw switches 15 respectively disposed in the four RF channels, wherein each set of adjustable phase shifters comprises a receiving end The phase shifter and the transmitting end adjustable phase shifter each of which is a duplexer, a radio frequency receiver and a radio frequency transmitter respectively connected in parallel with the duplexer. The RF channel can be mapped to the feed using a splitter or waveguide, and the RF channel selects different feed groups from the feed array through a single-pole, four-throw switch. Equivalent to the paraboloid antenna offset to form a beam scan. The feed array is switched by a single-pole four-throw switch, and the parabolic antenna is biased to achieve beam scanning. As shown in Figure 1, 1-2-3-4; 2-5-4-7; 5-6-7-8; 3-4-9-10; 4-7-10-13; 7-8 -13-14; 9-10-11-12; 10-13-12-15; 13-14-15-16 A total of 9 feed combinations. When switching to 1-2-3-4, the antenna beam is pointed to the upper left direction. When switching to 13-14-15-16, the antenna beam is pointed to the lower right direction. When switching to 4-7-10-13, the antenna beam direction is perpendicular to Paraboloid, beam is not deflected. 1 shows an example structure of a beam scanning device to which the present application is applicable. For example, in another exemplary configuration of the beam scanning device, the square feed array may be, for example, 9, 32 or 64 feeds or A square feed array consisting of more feeds.

FIG. 2 is a schematic structural diagram of Embodiment 1 of the channel calibration apparatus provided by the present application. As shown in FIG. 2, the channel calibration apparatus of this embodiment includes:

The calibration channel and the first probe 21 and the second probe 22 connected to the calibration channel and disposed on the secondary reflective surface 12, the calibration channel includes a radio frequency receiver, a radio frequency transmitter and a duplexer, and the first probe 21 is positive For the center of the square feed array, the first probe 21 can be the center of the vertical square-to-square feed array, and the second probe 22 is facing the center of the array of any four adjacent feeds of the square feed array. The second probe 22 can be the center of an array of any four adjacent feeds of a vertical square pair feed array, such as shown in FIG. 2, with the second probe 22 facing the feed 1-2- The center of 3-4, or the second probe 22 is facing the center of the feed 9-10-11-12, and may also be 2-5-4-7; 5-6-7-8; 3-4-9 The center of any of the 4 feeds of -10; 4-7-10-13; 7-8-13-14; 10-13-12-15; 13-14-15-16. The first probe is configured to receive a signal transmitted by the feed or to transmit a calibration signal, and the second probe is configured to receive a signal transmitted by the feed or transmit a calibration signal. The calibration channel can receive signals generated by the RF channel, or the transmitted signal can be received by the RF channel.

Wherein, the calibration channel may be a first RF receiver, a first RF transmitter, a first duplexer and a first probe in series, and a second RF receiver, a second RF transmitter, a second duplexer, and The second probes are sequentially connected in series, or, alternatively, as shown in FIG. 2, the channel calibration device further includes a switch 23, one end of the switch 23 is connected to the duplexer, and the other end is connected to the first probe and the second probe The needle is connected to the first probe 21 and the second probe 22 by the RF receiver 24, the RF transmitter 25, the duplexer 26, and the changeover switch 23 in series. By setting the switch 23, the cost can be reduced. Optionally, the switch 23 is a single pole double throw switch.

Further, the channel calibration apparatus of this embodiment may further include: a processor configured to control a connection of the calibration channel to the first probe or the second probe according to a preset rule, and control four sets of adjustable phase shifters and 4 single-pole four-throw switches for power-on emission calibration, power-on reception calibration, real-time transmission calibration or real-time reception calibration of the beam scanning device. The preset rule is: the four feeds are symmetric with respect to the first probe. The power received by the first probe is the largest; the power received by the second probe is the largest when the phases of the four feeds symmetric with respect to the second probe are the same; the symmetric with respect to the first probe or the second probe is 4 When the phases of the feeds are the same, the combined power of the signals received by the four RF channels is the largest.

In the channel calibration apparatus provided in this embodiment, the first probe and the second probe can receive the RF channel by setting the calibration channel and the first probe and the second probe connected to the calibration channel and placed on the secondary reflective surface. The signal can also be used to modulate the RF channel, switch the calibration channel to the first probe or the second probe, adjust the adjustable phase shifter of the RF channel, and power up the beam scanning device according to a preset rule. Calibration, power-on reception calibration, real-time transmit calibration, or real-time receive calibration eliminates the need to acquire the signal phase of the feed (antenna unit) and eliminates the need for complex calculations, making it easy to implement in the product.

The detailed process of the channel calibration method performed by the processor will be described below with reference to FIG.

3 is a schematic flowchart of Embodiment 1 of a channel calibration method provided by the present application. In this embodiment, a wave is mainly described. The beam scanning device performs a process of power-on emission calibration and real-time transmission calibration, wherein when performing power-on emission calibration or real-time transmission calibration, the feed transmits a signal, and the first probe or the second probe receives the signal transmitted by the feed. As shown in FIG. 3, the method includes:

S101. The first probe receives the maximum power when the four feeds are symmetric with respect to the first probe, and the second probe is symmetric when the four feeds are symmetric with respect to the second probe. The power-highest rule calibrates the beam-scanning device for power-on transmission.

The four feeds symmetric with respect to the first probe are exemplified by a square feed array 14 composed of 16 feeds as shown in FIG. 1, such as 4-7-10-13, which are relative to the four feeds. Symmetrical to the first probe, 1-6-11-16; 2-5-12-15; 3-9-8-14 three sets of four feeds are also symmetrical with respect to the first probe. The second probe 22 faces the center of the array of any four adjacent feeds of the square feed array, so the four feeds symmetric with respect to the second probe are the adjacent pairs of the second probe 22 4 feeds, for example, the second probe is opposite to the 4 feeds of 1-2-3-4, and the 4 feeds symmetric with respect to the second probe are 1-2-3-4. source. In the following example, the second probe is directly opposite to the four feeds of 1-2-3-4.

Specifically, S101 may specifically include:

S1011, switching the calibration channel to connect the first probe, switching the four single-pole four-throw switches to the first group of four feeds corresponding to the center of the square feed array, and adjusting the corresponding ones of the first group of four feeds The adjustable phase shifters on the four RF channels maximize the power received by the first probe, and obtain the phase parameter values of the first set of adjustable phase shifters corresponding to the first set of four feeds.

Specifically, taking the square feed array 14 composed of 16 feeds as shown in FIG. 1 as an example, the calibration channel is switched to connect the first probe by the switch, and the four single-pole four-throw switches are switched to the corresponding 4- 7-10-13 This first group of 4 feeds, adjust the adjustable phase shifter on the 4 RF channels corresponding to the 4 feeds of 4-7-10-13 to make the power received by the first probe At maximum, the phase parameter values of the first group of adjustable phase shifters corresponding to the four feeds of 4-7-10-13 are obtained, and at this time, 4-7-10-13 has the same phase.

S1012, switching four single-pole four-throw switches to the second group of four feeds corresponding to four corners of the square feed array, and adjusting the adjustable phase shifters on the four RF channels corresponding to the second group of four feeds The power received by the first probe is maximized, and the phase parameter values of the second set of adjustable phase shifters corresponding to the second set of four feeds are obtained.

Specifically, the four single-pole four-throw switches are switched to the four feeds corresponding to 1-6-11-16, and the corresponding adjustable phase shifters are adjusted to maximize the power received by the first probe, and the second group can be obtained. Adjust the phase parameter value of the phase shifter. At this time, 1-6-11-16 has the same phase.

S1013, switching four single-pole four-throw switches to the upper third group of four feeds in the middle two columns of the corresponding square feed array, and adjusting the adjustable shifts on the four RF channels corresponding to the third group of four feeds The phaser maximizes the power received by the first probe and obtains phase parameter values of the third set of adjustable phase shifters corresponding to the third set of four feeds.

Specifically, the four single-pole four-throw switches are switched to the four feeds corresponding to 2-5-12-15, and the corresponding adjustable phase shifters are adjusted so that the first probe receives the maximum power, and the third group can be obtained. Adjust the phase parameter value of the phase shifter. At this time, 2-5-12-15 has the same phase.

S1014: Switching four single-pole four-throw switches to four groups of four feeds in the middle two rows of the corresponding square feed array, and adjusting the adjustable shifts on the four RF channels corresponding to the fourth group of four feeds. The phaser maximizes the power received by the first probe, and obtains phase parameter values of the fourth set of adjustable phase shifters corresponding to the fourth set of four feeds.

Specifically, the four single-pole four-throw switches are switched to the four feeds corresponding to 3-9-8-14, and the corresponding adjustable phase shifts are adjusted. The maximum power received by the first probe is obtained, and the phase parameter values of the fourth group of adjustable phase shifters are obtained, and 3-9-8-14 have the same phase.

S1015, switching the calibration channel to the second probe, switching the four single-pole four-throw switches to the fifth group of four feeds corresponding to the second probe in the corresponding square feed array, and adjusting with the fifth group 4 The adjustable phase shifters on the four RF channels corresponding to the feeds maximize the power received by the second probe, and obtain the phase parameter values of the fifth group of adjustable phase shifters corresponding to the fifth group of four feeds. .

Specifically, the calibration channel is switched to connect the second probe by the switch, and the four single-pole four-throw switches are switched to the four feeds corresponding to 1-2-3-4, and the corresponding adjustable phase shifter is adjusted to make the first The power received by the two probes is the largest, and the phase parameter values of the fifth group of adjustable phase shifters are obtained. At this time, 1-2-3-4 has the same phase.

S1016, according to the phase parameter values of the fifth group of adjustable phase shifters, the phase parameter values of the first group of adjustable phase shifters, the phase parameter values of the second group of adjustable phase shifters, and the third group of adjustable phase shifts The phase parameter value of the device and the phase parameter value of the fourth group of adjustable phase shifters are corrected.

S102. When the real-time calibration trigger condition is triggered, perform real-time transmission calibration on the beam scanning device according to a rule that the power of the first probe is the same when the four feed phases of the four corners of the square feed array are the same.

Specifically, the real-time calibration trigger condition is triggered, including reaching a preset periodic trigger time or a bit error rate drop. The arrival of the preset periodic trigger time is the periodic real-time calibration.

Wherein, S102 can be specifically:

S1021. The calibration channel is switched to connect the first probe, and the four single-pole four-throw switches are switched to the sixth group of four feeds corresponding to the four corners of the square feed array, and the four groups of four feeds are adjusted. The adjustable phase shifters on the four RF channels maximize the power received by the first probe, and obtain the phase parameter values of the sixth set of adjustable phase shifters corresponding to the fourth set of four feeds.

Specifically, the calibration channel is switched to connect the first probe by the switch, and the four single-pole four-throw switches are switched to the four feeds corresponding to 1-6-11-16, and the corresponding adjustable phase shifter is adjusted to make the first The power received by one probe is the largest, and the phase parameter values of the sixth group of adjustable phase shifters are obtained. It can also be 2-5-4-7; 5-6-7-8; 3-4-9-10; 4-7-10-13; 7-8-13-14; 9-10-11-12 ; 10-13-12-15; 13-14-15-16 of any of the 4 feeds.

S1022: Obtain a real-time correction value of each RF channel according to a phase parameter value of the sixth group of adjustable phase shifters, thereby compensating for a phase shift of the RF transmit active circuit portion with temperature.

The channel calibration method provided in this embodiment adjusts the adjustable phase shifter of the radio frequency channel by switching the connection of the calibration channel to the first probe or the second probe, according to four feed phases symmetric with respect to the first probe. When the signals synthesized by the four RF channels are the same, and the four feeds that are symmetric with respect to the second probe are in phase, the signals synthesized by the four RF channels have the largest combined power, and the beam scanning device is powered on. Calibration and real-time transmit calibration eliminates the need to acquire the signal phase of the feed (antenna unit) and does not require complex calculations, making it easy to implement in the product.

4 is a schematic flowchart of Embodiment 2 of a channel calibration method provided by the present application. In this embodiment, a process of performing power-on reception calibration and real-time reception calibration on a beam scanning device is mainly described, wherein power-on reception calibration or real-time reception calibration is performed. The first probe or the second probe emits a calibration signal, and the feed receives the calibration signal. As shown in FIG. 4, the method includes:

S201, when the phase of the four feeds that are symmetric with respect to the first probe is the same, the combined power of the signals received by the four RF channels is the largest, and the four feeds that are symmetric with respect to the second probe are in phase, and the four RF channels are received. The rule that the maximum signal synthesis power is obtained is to perform power-on reception calibration on the beam scanning device.

Specifically, S201 may specifically include:

S2011, exciting the first probe to issue a calibration signal.

S2012, switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the first group of four feeds corresponding to the center of the square feed array, and adjusting the corresponding ones of the first group of four feeds The adjustable phase shifters on the four RF channels maximize the combined power of the signals received by the four RF channels, and obtain the phase parameter values of the first set of adjustable phase shifters corresponding to the first four feeds.

Specifically, taking the square feed array 14 composed of 16 feeds as shown in FIG. 1 as an example, the calibration channel is switched to connect the first probe by the switch, and the four single-pole four-throw switches are switched to the corresponding 4- 7-10-13 This first group of 4 feeds, adjust the adjustable phase shifters on the 4 RF channels corresponding to the 4 feeds of 4-7-10-13 to make the signals received by the 4 RF channels The synthesis power is the largest, and the phase parameter values of the first group of adjustable phase shifters corresponding to the four feeds of 4-7-10-13 are obtained.

S2013, switching four single-pole four-throw switches to the second group of four feeds corresponding to four corners of the square feed array, and adjusting the adjustable phase shifters on the four RF channels corresponding to the second group of four feeds The signal synthesis power received by the four RF channels is maximized, and the phase parameter values of the second group of adjustable phase shifters corresponding to the second group of four feeds are obtained.

Specifically, the four single-pole four-throw switches are switched to the four feeds corresponding to 1-6-11-16, and the corresponding adjustable phase shifters are adjusted so that the combined power of the signals received by the four RF channels is the largest, and the second is obtained. The phase parameter value of the group of adjustable phase shifters.

S2014, switching four single-pole four-throw switches to the upper third group of four feeds in the middle two columns of the corresponding square feed array, and adjusting the adjustable shifts on the four RF channels corresponding to the third group of four feeds The phase device maximizes the combined power of the signals received by the four RF channels, and obtains the phase parameter values of the third group of adjustable phase shifters corresponding to the third group of four feeds.

Specifically, the four single-pole four-throw switches are switched to the four feeds corresponding to 2-5-12-15, and the corresponding adjustable phase shifters are adjusted so that the combined power of the signals received by the four RF channels is the largest, and the third is obtained. The phase parameter value of the group of adjustable phase shifters.

S2015, switching four single-pole four-throw switches to four groups of four feeds in the middle two rows of the corresponding square feed array, and adjusting the adjustable shifts on the four RF channels corresponding to the fourth group of four feeds The phase device maximizes the combined power of the signals received by the four RF channels, and obtains the phase parameter values of the fourth group of adjustable phase shifters corresponding to the fourth group of four feeds.

Specifically, the four single-pole four-throw switches are switched to the four feeds corresponding to 3-9-8-14, and the corresponding adjustable phase shifters are adjusted so that the combined power of the signals received by the four RF channels is the largest, and the fourth is obtained. The phase parameter value of the group of adjustable phase shifters.

S2016, switching the calibration channel to connect the second probe, exciting the second probe to issue a calibration signal, and switching the four single-pole four-throw switches to the fifth group of four corresponding to the second probe symmetrically in the corresponding square feed array Feed, adjustment and The adjustable phase shifters on the four RF channels corresponding to the five groups of four feeds make the combined power of the signals received by the four RF channels the largest, and the fifth group of adjustable phase shifts corresponding to the fifth group of four feeds are obtained. The phase parameter value of the device.

Specifically, the calibration channel is switched to connect the second probe by the switch, the second probe is excited to issue a calibration signal, and the four single-pole four-throw switches are switched to the four feeds corresponding to 1-2-3-4, and the adjustment is performed. The corresponding adjustable phase shifter maximizes the combined power of the signals received by the four RF channels, and obtains the phase parameter values of the fifth group of adjustable phase shifters.

S2017, according to the phase parameter values of the fifth group of adjustable phase shifters, respectively, the phase parameter values of the first group of adjustable phase shifters, the phase parameter values of the second group of adjustable phase shifters, and the third group of adjustable phase shifts The phase parameter value of the device and the phase parameter value of the fourth group of adjustable phase shifters are corrected.

S202. When the real-time calibration trigger condition is triggered, the beam scanning device performs real-time reception calibration according to a rule that the four feed channels of the four corners of the square feed array are in the same phase, and the combined power of the signals received by the four RF channels is the largest.

Wherein, S202 can be specifically:

S2021. Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the corresponding four groups of four feeds, and exciting the first probe to issue a calibration signal, adjusting and the sixth group of four feeds. The adjustable phase shifters on the corresponding four RF channels maximize the combined power of the signals received by the four RF channels, and obtain the phase parameter values of the sixth group of adjustable phase shifters corresponding to the four groups of four feeds.

Specifically, the calibration channel is switched to connect the first probe by the switch, and the four single-pole four-throw switches are switched to the four feeds corresponding to 1-6-11-16, and the first probe is excited to issue a calibration signal. Adjusting the corresponding adjustable phase shifter makes the combined power of the signals received by the four RF channels the largest, and obtains the phase parameter values of the sixth group of adjustable phase shifters.

S2022: Obtain a real-time correction value of each RF channel according to a phase parameter value of the sixth group of adjustable phase shifters. It can compensate the phase drift of the RF receiving active circuit part with temperature.

The channel calibration method provided in this embodiment adjusts the adjustable phase shifter of the radio frequency channel by switching the connection of the calibration channel to the first probe or the second probe, according to four feed phases symmetric with respect to the first probe. When the signal synthesis power of the four RF channels is the same and the phase of the four feeds that are symmetric with respect to the second probe is the same, the signal synthesis power of the four RF channels is the highest. Calibration and real-time receive calibration eliminates the need to acquire the signal phase of the feed (antenna unit) and does not require complex calculations, making it easy to implement in the product.

The channel calibration method of FIGS. 3 and 4 will be described in detail below using a specific embodiment. In this embodiment, the process of power-on calibration, power-on reception calibration, real-time transmission calibration, and real-time reception calibration of the beam scanning device is mainly described.

The first is a power-on calibration, including a power-on emission calibration and a power-on reception calibration, taking the square feed array 14 of 16 feeds shown in FIG. 1 as an example.

First, power-on emission calibration

S301, switching the calibration channel to connect the first probe, and switching 4 single-pole four-throw switches to the corresponding 4-7-10-13 first group of 4 feeds, adjusting with 4-7-10-13 The adjustable phase shifters on the four RF channels corresponding to the feeds maximize the power received by the first probe, and the first set of adjustable phase shifts corresponding to the four feeds of 4-7-10-13 are obtained. The phase parameter value of the device, at this time 4-7-10-13 has the same phase.

S302, in the same way, according to the symmetry, sequentially correct 1-6-11-16; 2-5-12-15; 3-9-8-14 phase is consistent, so that the first probe receives the maximum power, and obtains the first Phase parameter values of two sets of adjustable phase shifters, and third set of adjustable phase shifters Phase parameter value, phase parameter value of the fourth group of adjustable phase shifters.

S303, switching the calibration channel to the second probe, switching the four single-pole four-throw switches to the four feeds corresponding to 1-2-3-4, and adjusting the corresponding adjustable phase shifter to enable the second probe to receive The maximum power is obtained, and the phase parameter values of the fifth group of adjustable phase shifters are obtained. At this time, 1-2-3-4 has the same phase.

S304. According to the phase parameter values of the fifth group of adjustable phase shifters, the phase parameter values of the first group of adjustable phase shifters, the phase parameter values of the second group of adjustable phase shifters, and the third group of adjustable phase shifts The phase parameter value of the device and the phase parameter value of the fourth group of adjustable phase shifters are corrected.

Second, power on receiving calibration

S401. Excitation of the first probe to issue a calibration signal.

S402, switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the corresponding 4-7-10-13 of the first group of 4 feeds, adjusting with 4-7-10-13 The adjustable phase shifters on the four RF channels corresponding to the feeds make the combined power of the signals received by the four RF channels the largest, and the first set of adjustable four feeds corresponding to 4-7-10-13 are obtained. The phase parameter value of the phase shifter, at which time 4-7-10-13 has the same phase.

S403. In the same way, according to the symmetry, the 1-6-11-16; 2-5-12-15; 3-9-8-14 phases are sequentially adjusted, so that the combined power of the signals received by the four RF channels is the largest. The phase parameter value of the second group of adjustable phase shifters, the phase parameter value of the third group of adjustable phase shifters, and the phase parameter values of the fourth group of adjustable phase shifters are obtained.

S404, switching the calibration channel to connect the second probe, invoking the second probe to issue a calibration signal, and switching the four single-pole four-throw switches to the four feeds corresponding to 1-2-3-4, and adjusting the corresponding adjustable The phase shifter maximizes the combined power of the signals received by the four RF channels, and obtains the phase parameter values of the fifth group of adjustable phase shifters. At this time, 1-2-3-4 have the same phase.

S405. According to the phase parameter values of the fifth group of adjustable phase shifters, respectively, the phase parameter values of the first group of adjustable phase shifters, the phase parameter values of the second group of adjustable phase shifters, and the third group of adjustable phase shifting phases The phase parameter value of the device and the phase parameter value of the fourth group of adjustable phase shifters are corrected.

This is followed by real-time calibration, including real-time transmit calibration and real-time receive calibration.

First, real-time launch calibration

S501, switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the four feeds corresponding to 1-6-11-16, and adjusting the corresponding adjustable phase shifter to enable the first probe to receive The maximum power is obtained, and the phase parameter values of the sixth group of adjustable phase shifters are obtained.

S502. Obtain a real-time correction value of each RF channel according to a phase parameter value of the sixth group of adjustable phase shifters, thereby compensating for a phase shift of the RF transmit active circuit portion with temperature.

Second, real-time receiving calibration

S601, switching the calibration channel to the first probe, switching the four single-pole four-throw switches to the four feeds corresponding to 1-6-11-16, and exciting the first probe to issue a calibration signal, adjusting the corresponding The phase shifter makes the combined power of the signals received by the four RF channels the largest, and the phase parameter values of the sixth group of adjustable phase shifters are obtained.

S602. Obtain a real-time correction value of each radio frequency channel according to a phase parameter value of the sixth group of adjustable phase shifters. It can compensate the phase drift of the RF receiving active circuit part with temperature.

The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.

One of ordinary skill in the art will appreciate that various aspects of the present application, or possible implementations of various aspects, can be embodied as a system, method, or computer program product. Accordingly, aspects of the present application, or possible implementations of various aspects, may be in the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, etc.), or a combination of software and hardware aspects, They are collectively referred to herein as "circuits," "modules," or "systems." Furthermore, aspects of the present application, or possible implementations of various aspects, may take the form of a computer program product, which is a computer readable program code stored in a computer readable medium.

The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium includes, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing, such as random access memory (RAM), read only memory (ROM), Erase programmable read-only memory (EPROM or flash memory), optical fiber, portable read-only memory (CD-ROM).

The processor in the computer reads the computer readable program code stored in the computer readable medium such that the processor is capable of performing the various functional steps specified in each step of the flowchart, or a combination of steps; A device that functions as specified in each block, or combination of blocks.

The computer readable program code can execute entirely on the user's local computer, partly on the user's local computer, as a separate software package, partly on the user's local computer and partly on the remote computer, or entirely on the remote computer or Executed on the server. It should also be noted that in some alternative implementations, the functions noted in the various steps in the flowcharts or in the blocks in the block diagrams may not occur in the order noted. For example, two steps, or two blocks, shown in succession may be executed substantially concurrently or the blocks may be executed in the reverse order.

Claims

A channel calibration device, configured to perform channel calibration on a beam scanning device, the beam scanning device having a primary reflective surface and a secondary reflective surface, four RF channels, and four groups respectively disposed in four RF channels An adjustable phase shifter, a square feed array of 16 feeds, and four single-pole four-throw switches respectively disposed in four RF channels, the channel calibration device comprising:

a calibration channel and a first probe and a second probe connected to the calibration channel and disposed on the secondary reflective surface, the calibration channel including a radio frequency receiver, a radio frequency transmitter, and a duplexer, A probe is facing the center of the square feed array, and the second probe is facing the center of an array of any four adjacent feeds of the square feed array.
The device according to claim 1, wherein said channel calibration device further comprises a switch, said switch being connected to said duplexer at one end and said first probe and said second probe at the other end needle.
The apparatus of claim 2 wherein said switch is a single pole double throw switch.
The apparatus according to claim 1, wherein said first probe is for receiving a signal transmitted by said feed or for transmitting a calibration signal, and said second probe is for receiving a signal transmitted by said feed Or transmit a calibration signal.
The device according to claim 1, further comprising:

a processor, configured to control connection of the calibration channel with the first probe or the second probe according to a preset rule, and control the four sets of adjustable phase shifters and the four single-pole four-throw switches Performing a power-on emission calibration, a power-on reception calibration, a real-time transmission calibration, or a real-time reception calibration on the beam scanning device, wherein the preset rule is: four feed phases symmetric with respect to the first probe are consistent in phase The power received by the first probe is the largest; the power received by the second probe is the largest when the four feeds are symmetric with respect to the second probe; and the first probe or the first When the four feeds of the two probes are in phase, the combined power of the signals received by the four RF channels is the largest.
A channel calibration method, characterized in that, in the channel calibration device according to any one of claims 1 to 5, the method comprises:

The second probe receives when the power received by the first probe is the largest and the four feeds symmetric with respect to the second probe are in phase when the four feeds are symmetric with respect to the first probe The power-up rule to the power-on-beam calibration of the beam scanning device;

When the real-time calibration trigger condition is triggered, the beam scanning device is calibrated in real time according to the rule that the four feeds of the four corners of the square feed array are in phase with the highest power received by the first probe. ;

Wherein, when performing the power-on emission calibration or the real-time transmission calibration, the feed transmits a signal, and the first probe or the second probe receives a signal transmitted by the feed.
The method according to claim 6, wherein the first probe receives the maximum power and is symmetric with respect to the second probe when the four feeds are symmetric with respect to the first probe. The rule that the maximum power received by the second probe is the same when the four feeds are in phase, and the power-on-beam calibration is performed on the beam scanning device, including:

Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to a first group of four feeds corresponding to the center of the square feed array, adjusting and Adjustable phase shifters on the four RF channels corresponding to a set of four feeds maximize the power received by the first probe, and obtain the first set of four feeds Corresponding phase parameter values of the first group of adjustable phase shifters;

Switching the four single-pole four-throw switches to the second group of four feeds corresponding to the four corners of the square feed array, and adjusting the four RF channels corresponding to the second group of four feeds Adjusting the phase shifter to maximize the power received by the first probe, and obtaining phase parameter values of the second group of adjustable phase shifters corresponding to the second group of four feeds;

Switching the four single-pole four-throw switches to four groups of four feeds corresponding to the middle two columns in the middle of the square feed array, and adjusting four RF channels corresponding to the third group of four feeds. Adjusting the phase shifter to maximize the power received by the first probe, and obtaining phase parameter values of the third group of adjustable phase shifters corresponding to the third group of four feeds;

Switching the four single-pole four-throw switches to four groups of four feeds corresponding to the middle two rows in the square feed array, and adjusting four RF channels corresponding to the fourth group of four feeds. Adjusting the phase shifter to maximize the power received by the first probe, and obtaining phase parameter values of the fourth group of adjustable phase shifters corresponding to the fourth group of four feeds;

Switching the calibration channel to connect the second probe, and switching the four single-pole four-throw switches to a fifth group of four feeds corresponding to the second probe in the square feed array a source, adjusting an adjustable phase shifter on the four RF channels corresponding to the fifth group of four feeds, so that the power received by the second probe is maximized, and obtaining the fourth group of four feeds Corresponding phase parameter values of the fifth group of adjustable phase shifters;

According to the phase parameter values of the fifth group of adjustable phase shifters, respectively, the phase parameter values of the first group of adjustable phase shifters, the phase parameter values of the second group of adjustable phase shifters, and the third group are adjustable The phase parameter value of the phase shifter and the phase parameter value of the fourth group of adjustable phase shifters are corrected.
The method according to claim 6, wherein the first received power of the first probe according to the four feed phases of the four corners of the square feed array is the same as the rule The scanning device performs real-time emission calibration, including:

Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to a sixth group of four feeds corresponding to four corners of the square feed array, adjusting and The adjustable phase shifters on the four RF channels corresponding to the six groups of four feeds maximize the power received by the first probe, and the sixth group that is corresponding to the sixth group of four feeds is adjustable. Phase parameter value of the phase shifter;

The real-time correction value of each radio frequency channel is obtained according to the phase parameter values of the sixth group of adjustable phase shifters.
The method according to any one of claims 6 to 8, wherein the real-time calibration trigger condition is triggered, including:

The preset periodic trigger time is reached or the bit error rate is decreased.
A channel calibration method, characterized in that, in the channel calibration device according to any one of claims 1 to 5, the method comprises:

According to the four feeds that are symmetric with respect to the first probe, the signals synthesized by the four RF channels have the largest combined power and the four feeds that are symmetric with respect to the second probe are received by the four RF channels. The rule that the signal synthesis power is maximum is used to perform power-on reception calibration on the beam scanning device;

When the real-time calibration trigger condition is triggered, the beam scanning device is subjected to real-time reception calibration according to the rule that the four feed channels of the four corners of the square feed array are in the same phase, and the combined power of the signals received by the four RF channels is the largest. ;

Wherein the first probe or the second probe is issued when the power-on reception calibration or the real-time reception calibration is performed A calibration signal, the feed receiving the calibration signal.
The method according to claim 10, wherein the signals received by the four RF channels are symmetric according to the phase of the four feeds symmetric with respect to the first probe, and are symmetric with respect to the second probe. The rules for the maximum combined power of the signals received by the four RF channels when the four feed phases are the same are the power-on receiving calibration of the beam scanning device, including:

Exciting the first probe to emit a calibration signal;

Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to a first group of four feeds corresponding to the center of the square feed array, adjusting and The adjustable phase shifters on the four RF channels corresponding to a set of four feeds enable the combined power of the signals received by the four RF channels to be maximized, and the first set of adjustable corresponding to the first set of four feeds is obtained. Phase parameter value of the phase shifter;

Switching the four single-pole four-throw switches to the second group of four feeds corresponding to the four corners of the square feed array, and adjusting the four RF channels corresponding to the second group of four feeds Adjusting the phase shifter to maximize the combined power of the signals received by the four RF channels, and obtaining phase parameter values of the second group of adjustable phase shifters corresponding to the second group of four feeds;

Switching the four single-pole four-throw switches to four groups of four feeds corresponding to the middle two columns in the middle of the square feed array, and adjusting four RF channels corresponding to the third group of four feeds. The adjustable phase shifter maximizes the combined power of the signals received by the four RF channels, and obtains the phase parameter values of the third group of adjustable phase shifters corresponding to the third group of four feeds;

Switching the four single-pole four-throw switches to four groups of four feeds corresponding to the middle two rows in the square feed array, and adjusting four RF channels corresponding to the fourth group of four feeds. The adjustable phase shifter maximizes the combined power of the signals received by the four RF channels, and obtains the phase parameter values of the fourth group of adjustable phase shifters corresponding to the fourth group of four feeds;

Switching the calibration channel to connect the second probe, exciting the second probe to issue a calibration signal, and switching the four single-pole four-throw switches to correspond to the square feed array relative to the first A fifth set of four feeds symmetrically symmetrical with the two probes, and an adjustable phase shifter on the four RF channels corresponding to the fifth set of four feeds is adjusted to maximize the combined power of the signals received by the four RF channels. Obtaining a phase parameter value of the fifth group of adjustable phase shifters corresponding to the fifth group of four feeds;

According to the phase parameter values of the fifth group of adjustable phase shifters, respectively, the phase parameter values of the first group of adjustable phase shifters, the phase parameter values of the second group of adjustable phase shifters, and the third group are adjustable The phase parameter value of the phase shifter and the phase parameter value of the fourth group of adjustable phase shifters are corrected.
The method according to claim 10, wherein said step of synthesizing the power of the signals received by the four RF channels according to the four feed phases of the four corners of the square feed array is the same for the beam The scanning device performs real-time reception calibration, including:

Switching the calibration channel to the first probe, switching the four single-pole four-throw switches to corresponding to the sixth group of four feeds, and exciting the first probe to issue a calibration signal, adjusting The adjustable phase shifters on the four RF channels corresponding to the sixth group of four feeds maximize the combined power of the signals received by the four RF channels, and obtain the first corresponding to the sixth group of four feeds. Phase parameter values of six sets of adjustable phase shifters;

The real-time correction value of each radio frequency channel is obtained according to the phase parameter values of the sixth group of adjustable phase shifters.
The method according to any one of claims 10 to 12, wherein the real-time calibration trigger condition is triggered, including:

The preset periodic trigger time is reached or the bit error rate is decreased.