WO2016145841A1

WO2016145841A1 - Antenna switching method and terminal

Info

Publication number: WO2016145841A1
Application number: PCT/CN2015/092154
Authority: WO
Inventors: 程守刚
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-08-18
Filing date: 2015-10-19
Publication date: 2016-09-22
Also published as: CN106470066A

Abstract

Disclosed in the present invention is a terminal. The terminal comprises at least two transceiving antennas and further comprises a control circuit, wherein the control circuit utilizes a mismatch parameter of the transceiving antenna connected to a first transceiving channel of the terminal, and controls to switch the connection of the first transceiving channel to one of the at least two transceiving antennas. Also disclosed in the present invention is an antenna switching method.

Description

Antenna switching method and terminal

Technical field

The present invention relates to terminal technologies, and in particular, to a method and a terminal for antenna switching.

Background technique

Due to technical limitations such as small antenna size and complex environmental conditions and imperfect network coverage, mobile communication terminals often encounter problems with poor communication and communication quality. Especially with the construction of 4G networks, the same mobile communication terminal needs to support multiple frequency bands of 2G, 3G, 4G, WIFI, Bluetooth, etc. at the same time, so the performance of the antenna is very difficult to achieve, thus making the communication quality Will be greatly affected. Therefore, how to improve call performance and communication quality in a limited mobile phone space is an eternal pursuit of antenna design engineers and RF engineers.

At present, the conventional design of the antenna is a design method using a diversity antenna and a main set antenna. Specifically, the diversity antenna and the main antenna are responsible for each other, and are fixed after the design is completed. The diversity antenna can compensate for the poor reception performance of the main set antenna to a certain extent in different systems. However, in this design mode, the diversity antenna cannot replace the main antenna to receive some signaling, so that some signaling messages and network interaction information cannot be demodulated by the diversity antenna; otherwise, the diversity antenna does not have a transmitting function, and therefore cannot Make up for the problem that the path loss of the reverse link of the main set antenna is too large.

Therefore, how to make full use of the advantages of multiple antennas to improve communication quality is an urgent problem to be solved.

Summary of the invention

In order to solve the existing technical problems, the embodiments of the present invention provide a method and a terminal for antenna switching.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a terminal, including: at least two receiving transmit antennas; the terminal further includes: a control circuit;

The control circuit is configured to control the first receiving transmit channel to switch to one of the at least two receive transmit antennas by using a mismatch parameter of a receive transmit antenna interconnected with a first receive transmit channel of the terminal Receive transmit antenna interconnection.

In the above solution, the control circuit is further configured to control the second receiving channel switching of the terminal when the first receiving transmission channel is switched to be interconnected with one of the at least two receiving transmitting antennas. Connected to the receiving transmit antenna corresponding to the mismatch parameter; wherein

Before the switching, the second receiving channel is interconnected with the receiving transmitting antenna after the first receiving transmitting channel is switched.

In the above solution, the terminal further includes: a switch circuit; wherein

The control circuit is configured to: control, by using the mismatch parameter, the first receiving transmit channel to switch to the at least two receive transmit antennas except the mismatch parameter by controlling a state of the switch circuit And receiving, by the corresponding receiving transmit antenna, a receiving transmit antenna; and controlling the second receiving channel to switch to a receiving transmit antenna corresponding to the mismatch parameter.

In the above solution, the terminal further includes: a mismatch parameter detecting circuit configured to detect a mismatch parameter of the receiving transmit antenna interconnected with the first receiving transmit channel, and send the detected mismatch parameter to the control circuit ;

Correspondingly, the control circuit is further configured to: after receiving the mismatch parameter sent by the mismatch parameter detecting circuit, determine that the antenna switching needs to be performed when the mismatch parameter is greater than or equal to a preset threshold.

In the above solution, the mismatch parameter detecting circuit includes: a reverse coupling circuit and a mismatch parameter determining circuit; wherein

The reverse coupling circuit is configured to couple a reception interconnected with the first receiving transmission channel a reflected signal generated by the mismatch of the transmitting antenna;

The mismatch parameter determining circuit is configured to determine a mismatch parameter of the receiving transmitting antenna interconnected with the first receiving transmitting channel by using the reflected signal coupled by the reverse coupling circuit, and send the mismatch parameter to the control circuit.

In the above solution, the mismatch parameter determining circuit includes: a power detecting circuit and an analog-to-digital converting circuit; wherein

The power detection circuit is configured to detect a power of the reflected signal, and send an analog signal of the detected power to the analog to digital conversion circuit;

The analog-to-digital conversion circuit is configured to convert an analog signal of the power transmitted by the power detection circuit into a digital signal, obtain the mismatch parameter, and send the mismatch parameter to the control circuit.

In the above solution, the terminal further includes a setting unit configured to adjust an impedance parameter of the adjustable load to a transmitting circuit standing wave ratio of the terminal, so that the receiving transmitting antenna interconnected with the first receiving transmitting channel is in a mismatch State; and detecting a mismatch parameter of the receiving transmit antenna in a mismatched state to obtain the preset threshold.

The embodiment of the invention further provides a method for antenna switching, including:

The first receive transmit channel is controlled to be switched to interconnect with one of the at least two receive transmit antennas of the terminal using a mismatch parameter of the receive transmit antenna interconnected with the first receive transmit channel of the terminal.

In the above solution, when the controlling the first receiving and transmitting channel is switched to be interconnected with one of the at least two receiving and transmitting antennas of the terminal, the method further includes:

Controlling, by the second receiving channel of the terminal, to the receiving transmit antenna corresponding to the mismatch parameter; wherein

In the above solution, the controlling the first receiving and transmitting channel to switch to the at least two Receiving one of the receiving transmit antennas; and controlling the second receiving channel of the terminal to switch to the receiving transmit antenna corresponding to the mismatch parameter, as follows:

Controlling, by the control of the state of the switch circuit of the terminal, the first receive transmit channel to be switched to be outside the receive transmit antenna corresponding to the mismatch parameter of the at least two receive transmit antennas by using the mismatch parameter And receiving a transmit antenna interconnect; and controlling the second receive channel to switch to a receive transmit antenna corresponding to the mismatch parameter.

In the above solution, the method further includes:

Detecting a mismatch parameter of the receiving transmit antenna interconnected with the first receive transmit channel;

Correspondingly, when the mismatch parameter is greater than or equal to a preset threshold, it is determined that antenna switching needs to be performed.

In the above solution, the detecting a mismatch parameter of the receiving transmit antenna interconnected with the first receiving transmit channel includes:

Generating a reflected signal generated by the mismatch of the receiving transmit antenna interconnected with the first receiving transmit channel;

A mismatch parameter of the receive transmit antenna interconnected with the first receive transmit channel is determined using the reflected signal coupled by the reverse coupled circuit.

In the above solution, the use of the reflected signal coupled by the reverse coupling circuit to determine a mismatch parameter of the receiving transmit antenna interconnected with the first receiving transmit channel is:

Detecting the power of the reflected signal to obtain an analog signal of power;

The analog signal of power is converted to a digital signal to obtain the mismatch parameter.

In the foregoing solution, before the detecting a mismatch parameter of the receiving transmit antenna that is interconnected with the first receiving transmit channel, the method further includes:

Adjusting an impedance parameter of the adjustable load to a transmit circuit standing wave ratio of the terminal, so that the receive transmit antenna interconnected with the first receive transmit channel is in a mismatch state;

The mismatch parameter of the receiving transmit antenna in the mismatch state is detected to obtain the preset threshold.

The antenna switching method and terminal provided by the embodiment of the present invention control the first receiving and transmitting channel to switch to at least two of the terminals by using a mismatch parameter of the receiving transmitting antenna interconnected with the first receiving and transmitting channel of the terminal. One of the receiving transmit antennas is interconnected and the transmit antenna is interconnected, so that the advantages of multiple antennas can be fully utilized to improve communication quality.

DRAWINGS

In the drawings, which are not necessarily to scale, the Like reference numerals with different letter suffixes may indicate different examples of similar components. The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

1 is a schematic structural diagram of a first terminal according to an embodiment of the present invention;

2 is a schematic structural diagram of a second terminal according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a third terminal according to Embodiment 1 of the present invention;

4 is a schematic structural diagram of a fourth terminal according to Embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of a fifth terminal according to Embodiment 1 of the present invention; FIG.

6 is a schematic structural diagram of a terminal according to Embodiment 2 of the present invention;

FIG. 7 is a schematic flowchart of a method for switching three antennas according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

At present, the conventional design of the antenna is a design method using a diversity antenna and a main set antenna. In the process of implementing the present invention, the inventors have found through research that a transmitting and receiving antenna of a mobile terminal such as a mobile phone is often designed at the bottom. This design allows the user to increase the loss after holding the mobile terminal, so that the main receiving antenna corresponds to the main receiving transmitting channel. Performance is seriously deteriorating. This degradation has a great impact on the user experience of using a mobile phone in a weak signal area. In addition, in a complex scenario where the scene test is often performed, the diversity antenna is sometimes much better than the signal of the main set antenna. So how to make full use of multiple antennas The advantage that the performance of the main receiving and transmitting channel is optimized by an algorithm is an important problem to be solved by the embodiment of the present invention.

Based on this, in various embodiments of the present invention, the first receiving transmission channel is controlled to be switched to at least two with the terminal by using a mismatch parameter of the receiving transmitting antenna interconnected with the first receiving transmission channel of the terminal. One of the receiving transmit antennas is interconnected with a transmit antenna.

Embodiment 1

The present embodiment provides a terminal. As shown in FIG. 1, the terminal includes: at least two receiving transmit antennas 11, a transmitting circuit 12, and at least two receiving circuits 13; the at least two receiving transmitting antennas include a first receiving a transmitting antenna 111 and a second receiving transmitting antenna 112; the two or more receiving circuits include: a first receiving circuit 131 and a second receiving circuit 132; the terminal further includes: a control circuit 14;

The control circuit 14 is configured to control the first receiving transmit channel to switch to one of the at least two receive transmit antennas 11 by using a mismatch parameter of the receive transmit antenna interconnected with the first receive transmit channel of the terminal Receive transmit antenna interconnection.

Here, the control circuit 14 is further configured to control the second receiving channel of the control terminal to switch to when the first receiving transmission channel is switched to be interconnected with one of the at least two receiving transmitting antennas 11 The receiving transmit antennas corresponding to the mismatch parameters are interconnected.

The second receiving channel is interconnected with the receiving transmitting antenna 13 after the first receiving transmitting channel is switched before the switching.

When the specific receiving transmitting antenna is used to describe the connection relationship between the first receiving transmitting channel and the second receiving channel and the at least two receiving transmitting antennas, the transmitting circuit 12 and the first receiving circuit 131 are as shown in FIG. The combined path is a channel called the first receiving transmitting channel. That is, the first receiving transmission channel is a receiving transmission channel corresponding to the transmitting circuit 12 and the first receiving circuit 131; the second receiving channel is a receiving corresponding to the second receiving circuit 132. aisle.

The transmitting circuit 12 and the first receiving circuit 131 form a receiving and transmitting circuit, and the receiving and transmitting circuit may be referred to as a primary receiving and transmitting circuit, and is mainly configured to receive and demodulate and reverse link the forward link signal in wireless communication. The modulation, amplification, and transmission of the road signal; correspondingly, the first receiving transmission channel corresponding to the transmitting circuit 12 and the first receiving circuit 131 may be referred to as a primary receiving transmitting channel.

The second receiving circuit 132 is mainly configured to receive the diversity of the forward link signal, and complements the first receiving circuit 131 to enhance the communication quality of the forward link or improve the throughput.

The at least two receive transmit antennas 11 may be configured to transmit wireless communication information or may be configured to receive wireless communication information.

The terminal provided by the embodiment of the present invention, when determining the need to perform antenna switching by using the mismatch parameter of the first receiving and transmitting antenna 111, switching the first receiving and transmitting channel interconnected with the first receiving and transmitting antenna 111 to The second receiving transmit antennas 112 are interconnected; and the second receiving channel interconnected with the second receiving transmit antenna 112 is switched to be interconnected with the first receive transmit antenna 111.

Wherein, when it is determined that the antenna switching needs to be performed, the first receiving transmitting antenna 111 is in a mismatch state.

In practical applications, when there are more than three receiving transmitting antennas, priority can be set for more than three receiving transmitting antennas, so that the corresponding antennas are switched according to the set priorities.

In an embodiment, as shown in FIG. 2, the terminal may further include: a switch circuit 15; wherein

The control circuit 14 is specifically configured to: control, by using the mismatch parameter, to switch the first receiving and transmitting channel to be separated from the at least two receiving and transmitting antennas 11 by controlling a state of the switching circuit 15 A receiving transmitting antenna 11 outside the receiving transmitting antenna corresponding to the mismatch parameter is interconnected; and the second receiving channel is controlled to be switched to the receiving transmitting antenna 11 corresponding to the mismatch parameter.

When a specific receiving transmit antenna is used to describe the connection relationship between the first receiving transmit channel and the second receive channel and the at least two receive transmit antennas, there is: by controlling the state of the switch circuit 15, A first receive transmit channel interconnected by a receive transmit antenna 111 is switched to interconnect with the second receive transmit antenna 112; and the second receive channel interconnected with the second receive transmit antenna 112 is switched to the first A receiving transmit antenna 111 is interconnected.

In other words, a function of the switch circuit 15 is to interconnect the first receive transmit channel with the first receive transmit antenna 111 and the second receive channel and the second receive transmit antenna 112 is interconnected; and another function is to interconnect the first receive transmit channel with the second receive transmit antenna 112 and interconnect the second receive channel with the first receive transmit antenna 111.

In an embodiment, as shown in FIG. 3, the terminal may further include: a mismatch parameter detecting circuit 16 configured to detect a mismatch parameter of the receiving transmit antenna interconnected with the first receiving transmit channel, and detect the a mismatch parameter is sent to the control circuit;

Correspondingly, the control circuit 14 is further configured to: after receiving the mismatch parameter sent by the mismatch parameter detecting circuit 16, determine that the antenna switching needs to be performed when the mismatch parameter is greater than or equal to a preset threshold.

When the specific receiving transmit antenna is used to describe the connection relationship between the first receiving transmit channel and the second receive channel and the at least two receive transmit antennas, the mismatch parameter detection circuit 16 is configured to detect the first Receiving a mismatch parameter of the transmitting antenna 111, and transmitting the detected mismatch parameter to the control circuit 14;

Correspondingly, the control circuit 14 is configured to determine that the antenna switching needs to be performed when the mismatch parameter is greater than or equal to the preset threshold after receiving the mismatch parameter sent by the mismatch parameter detecting circuit 16.

Here, when the mismatch parameter is greater than or equal to a preset threshold, it indicates that the first receiving transmit antenna 111 has poor matching, and antenna switching needs to be performed; when the mismatch parameter is smaller than the pre- When the threshold is set, it indicates that the first receiving and transmitting antenna 111 has good matching, and it is not necessary to perform antenna switching.

The matching work of the antenna refers to: eliminating the reactance component in the input impedance of the antenna, so that the resistance component is as close as possible to the characteristic impedance of the feeder.

Here, the input impedance of the antenna refers to the ratio of the input voltage of the antenna feed end to the input current. The best connection between the antenna and the feeder is: the input impedance of the antenna is pure resistance and equal to the characteristic impedance of the feeder. At this time, there is no power reflection at the feeder terminal, there is no standing wave on the feeder, and the input impedance of the antenna changes gently with frequency.

The preset threshold may be set using a simulation result.

In an embodiment, the mismatch parameter detecting circuit 16 detects the mismatch parameter of the first receiving transmitting antenna 111 by using the reflected signal generated by the first receiving transmitting antenna 111 by the mismatch.

In practical application, as shown in FIG. 4, the mismatch parameter detecting circuit 16 may include: a reverse coupling circuit 161 and a mismatch parameter determining circuit 162;

When the specific receiving transmit antenna is used to describe the connection relationship between the first receiving transmit channel and the second receive channel and the at least two receive transmit antennas, the reverse coupling circuit 161 is configured to be coupled with the a reflected signal generated by a mismatch of the receiving transmit antenna interconnected by the first receiving transmit channel;

The mismatch parameter determining circuit 162 is configured to determine, by using the reflected signal coupled by the reverse coupling circuit, a mismatch parameter of the receiving transmit antenna interconnected with the first receiving transmit channel, and send the mismatch parameter to the control circuit 14 .

The reverse coupling circuit 161 is configured to couple a reflected signal generated by the first receiving transmitting antenna by a mismatch;

The mismatch parameter determining circuit 162 is configured to determine a mismatch parameter of the first receiving transmitting antenna by using a reflected signal coupled by the reverse coupling circuit, and send the mismatch parameter to the control circuit 14.

In an embodiment, as shown in FIG. 5, the mismatch parameter determination circuit 162 may include: a power detection circuit 1621 and an analog to digital conversion circuit 1622; wherein

The power detection circuit 1621 is configured to detect the power of the reflected signal, and send the analog signal of the detected power to the analog to digital conversion circuit 1622;

The analog-to-digital conversion circuit 1622 is configured to convert an analog signal of the power transmitted by the power detecting circuit 1621 into a digital signal to obtain the mismatch parameter, and send the mismatch parameter to the control circuit 14.

Here, the power of the reflected signal may also be referred to as the level of the reflected signal.

In an embodiment, the terminal may further include: a setting unit configured to adjust an impedance parameter of the adjustable load to a transmit circuit standing wave ratio of the terminal to enable a receive transmit antenna interconnected with the first receive transmit channel In a mismatch state; and detecting a mismatch parameter of the receiving transmit antenna in a mismatched state, the preset threshold is obtained.

According to the terminal provided by the embodiment of the present invention, the control circuit 14 controls the first receiving transmission channel to be switched to the at least two receiving transmitting antennas 11 by using a mismatch parameter of the receiving transmitting antenna interconnected with the first receiving transmitting channel. A receiving transmit antenna interconnect allows for the full advantage of multiple antennas to improve communication quality.

Additionally, when controlling the first receive transmit channel to switch to interconnect with one of the at least two receive transmit antennas 11, the control circuit 14 also controls the second receive channel to switch to the mismatch The receiving and transmitting antennas corresponding to the parameters are interconnected, so that the advantages of multiple antennas can be further utilized to improve the communication quality.

Embodiment 2

On the basis of the first embodiment, the terminal includes two receiving transmitting antennas (for the first receiving transmitting antenna 111 and the second receiving transmitting antenna 112), the transmitting circuit 12, and two receiving circuits (for the first receiving circuit). 131 and the second receiving circuit 132) are used as an example to describe in detail the process of the antenna switching. In this case, as shown in FIG. 6, the terminal further includes: a control circuit 14, a switch circuit 15, and a mismatch parameter detecting circuit 16; The mismatch parameter detecting circuit 16 further includes: The reverse coupling circuit 161 and the mismatch parameter determining circuit 162; the mismatch parameter determining circuit 162 further includes: a power detecting circuit 1621 and an analog to digital converting circuit 1622. The transmitting circuit 12 and the first receiving circuit 131 form a first receiving transmitting circuit.

As shown in FIG. 6, the control circuit 14 controls the state of the switch circuit 15 such that the first receive transmit channel is interconnected with the first receive transmit antenna 111 and the second receive channel is interconnected with the second receive transmit antenna 112; The receiving transmitting antenna 111 and the first receiving transmitting channel perform receiving and transmitting of corresponding information, and receive corresponding information through the second receiving transmitting antenna 112 and the second receiving channel.

At this time, the reverse coupling circuit 161 couples the reflected signal generated by the first receiving transmitting antenna 111 by the mismatch, and sends it to the power detecting circuit 1621; the power detecting circuit 1621 detects the function of the reflected signal, and detects the signal. The analog signal of the power is sent to the analog-to-digital conversion circuit 1622; the analog-to-digital conversion circuit 1622 converts the analog signal into a digital signal, thereby obtaining the mismatch parameter of the first receiving transmitting antenna 111, and transmitting it to the control circuit 14; the control circuit 14 The mismatch parameter (K ₁ ) sent by the analog-to-digital conversion circuit 1622 is compared with a preset threshold (K _a ). When K ₁ ≥K _a , it indicates that the first receiving and transmitting antenna 111 is in a mismatch state, and antenna switching needs to be performed. At this time, the control circuit 14 performs antenna switching, that is, the control circuit 14 controls the state of the switch circuit 15 such that the first receive transmit channel is interconnected with the second receive transmit antenna 112, and the second receive channel is transmitted with the first receive channel. The antennas 111 are interconnected to receive and transmit corresponding information through the second receiving and transmitting antennas 112 and the first receiving and transmitting channels, and transmit the first receiving The line 111 and the second receiving channel receive the corresponding information.

Wherein, when K ₁ <K _a , it indicates that the first receiving and transmitting antenna 111 is not in a mismatch state, and it is not necessary to perform antenna switching. At this time, the control circuit 14 does not perform antenna switching.

The setting unit of the terminal adjusts the impedance parameter of the adjustable load to the transmitting circuit standing wave ratio of the terminal, so that the first receiving transmitting antenna 111 is in a mismatch state; and detects the mismatch parameter in the first receiving transmitting antenna 111, A preset threshold (K _a ) is obtained.

Specifically, assuming that the terminal is a mobile phone, the impedance of the first receiving transmitting antenna 111 of the mobile phone with the adjustable load analog mobile phone is changed due to hand-held occlusion, that is, the impedance of the change causes the first receiving transmitting antenna 111 of the mobile phone to be in a mismatch state. The impedance parameter of the load regulation is adjusted to the mobile station transmitting circuit VSWR=V. Here, V is set according to different working frequency bands of the mobile phone, and the constant is usually 3;

In this connected state, the mobile phone transmit power value is controlled to be Pm, and the analog-to-digital converter (ADC) value of the inverted level of the reflected signal coupled to the reverse coupling circuit 161 (processed by the power detecting circuit 1621) is read. (processed by analog-to-digital conversion circuit 1622), recorded as the threshold K _{a of} the operating band. Pm is the set value, which can be set to be 3dB smaller than the maximum transmit power of the mobile phone.

By using the above method, the K _a value of each working frequency band of the terminal is sequentially recorded.

In practice, the above setup process can be performed in a laboratory or on a production line.

When the control circuit 14 controls the state of the switch circuit 15 such that the first receive transmit channel is interconnected with the second receive transmit antenna 112 and the second receive channel is interconnected with the first receive transmit antenna 111, the reverse coupled circuit 161 is coupled The second receiving transmitting antenna 112 is reflected by the mismatch and sent to the power detecting circuit 1621; the power detecting circuit 1621 detects the function of the reflected signal, and sends the analog signal of the detected power to the modulus. Conversion circuit 1622; analog to digital conversion circuit 1622 converts the analog signal into a digital signal, thereby obtaining a mismatch parameter of the second receiving transmit antenna 112, and transmitting it to control circuit 14; control circuit 14 transmits the mismatch sent by analog to digital conversion circuit 1622 The parameter (K ₂ ) is compared with the preset threshold (K _b ). When K ₂ ≥ K _b , the second receiving transmit antenna 112 is in a mismatch state, and antenna switching needs to be performed. At this time, the control circuit 14 performs antenna switching. That is, the control circuit 14 controls the state of the switch circuit 15 such that the first receive transmit channel is interconnected with the first receive transmit antenna 111 and the second receive pass Interconnecting with the second receiving transmit antenna 112, so that receiving and transmitting corresponding information is performed by the first receiving transmitting antenna 111 and the first receiving transmitting channel, and corresponding information is performed by the second receiving transmitting antenna 112 and the second receiving channel. receive.

Here, as shown in FIG. 6, one end of the reverse coupling circuit 161 is connected to the first receiving transmitting circuit, and the other end is connected to the switching circuit 15, and by controlling the state of the switching circuit 15, the reverse coupling circuit 161 can couple the first The received transmit antenna 111 is reflected by a mismatch or is coupled to a reflected signal generated by the second receive transmit antenna 112 by a mismatch.

Wherein, when K ₂ <K _b , it indicates that the second receiving and transmitting antenna 112 is not in a mismatch state, and it is not necessary to perform antenna switching. At this time, the control circuit 14 does not perform antenna switching.

The setting unit adjusts the impedance parameter of the adjustable load to the transmitting circuit standing wave ratio of the terminal, so that the second receiving transmitting antenna 112 is in a mismatch state; and detects the mismatch parameter in the second receiving transmitting antenna 112, and obtains a preset Threshold (K _b ).

Predetermined threshold value (K _b) of the specific process of setting the predetermined threshold value (K _a) of the process of setting the same, is omitted.

It should be noted that, in actual application, the control circuit 14 has previously learned which working frequency band the terminal is currently in, and uses the preset threshold of the corresponding working frequency band to determine the first receiving transmission channel corresponding to the receiving transmitting circuit 12 (main Receive Transmit Channel) The interconnected transmit transmit antenna is in a mismatched state.

The specific device components and connection relationships of the receiving transmit antenna 11, the transmitting circuit 12, the receiving circuit 13, the control circuit 14, the switch circuit 15, the reverse coupling circuit 161, the power detecting circuit 1621, and the analog-to-digital conversion circuit 1622 are not concerned with the embodiments of the present invention. The content, therefore, does not limit the specific device components and connection relationships of these circuits.

As can be seen from the above description, the solution provided by the embodiment of the present invention interconnects the first receiving transmission channel (main receiving transmitting channel) corresponding to the transmitting circuit 12 and the first receiving circuit 131 (the first receiving transmitting circuit). Whether the receiving transmitting antenna is in a mismatch state, can determine which receiving transmitting antenna is the best performance antenna; then interconnect the main receiving transmitting channel with the better performing receiving transmitting antenna, and the second receiving channel and the sub-optimal performance. Receiving transmit antenna interconnection, Therefore, the primary receiving transmission channel is preferentially interconnected with the receiving transmitting antennas having better performance in the first receiving transmitting antenna 111 and the second receiving transmitting antenna 112, and the second receiving channel is interconnected with the sub-optimal receiving transmitting antenna, and further Utilizing the advantages of multiple antennas, the performance of the main receiving transmission channel is optimized.

Embodiment 3

On the basis of the second embodiment, this embodiment describes in detail how to perform antenna switching when the terminal supports the 2G, 3G, and 4G communication systems at the same time.

As in the second embodiment, the terminal in this embodiment includes two receiving and transmitting antennas (the first receiving transmitting antenna 111 and the second receiving transmitting antenna 112), the transmitting circuit 12, and two receiving circuits (for the first receiving circuit 131). And the second receiving circuit 132), at this time, as shown in FIG. 6, the terminal further includes: a control circuit 14, a switch circuit 15, and a mismatch parameter detecting circuit 16; wherein the mismatch parameter detecting circuit 16 further comprises: reverse coupling The circuit 161 and the mismatch parameter determining circuit 162; the mismatch parameter determining circuit 162 further includes: a power detecting circuit 1621 and an analog to digital converting circuit 1622. The transmitting circuit 12 and the first receiving circuit 131 form a first receiving transmitting circuit.

When the terminal works in the 2G network, it is assumed that the working frequency band is A and the working channel is B. At this time, it is assumed that the first receiving transmission channel is interconnected with the first receiving transmitting antenna 111 and the second receiving channel is interconnected with the second receiving transmitting antenna 112.

When the terminal is not in the transmitting state, that is, when the 2G network is not used for the call or data service, the mismatch parameter detecting circuit 16 does not detect the mismatch parameter of the first receiving transmitting antenna 111.

When the terminal is in a transmitting state, that is, using a 2G network for a call or data service, the reverse coupling circuit 161 couples the reflected signal generated by the first receiving transmitting antenna 111 by the mismatch, and sends the reflected signal to the power detecting circuit 1621; The detecting circuit 1621 detects the function of the reflected signal, and sends the analog signal of the detected power to the analog-to-digital converting circuit 1622; the analog-to-digital converting circuit 1622 converts the analog signal into a digital signal, thereby obtaining the first receiving transmitting antenna 111. Mismatch parameter; the control circuit 14 acquires the mismatch parameter (K ₁ ) from the analog-to-digital conversion circuit 1622 periodically (for example, 5 times per second, etc.), and obtains the mismatch parameter with the pre-stored working frequency band A, The working channel B and the preset threshold corresponding to the first receiving and transmitting antennas 111 are compared. If the duration of the mismatching parameter is greater than or equal to the corresponding preset threshold, the first receiving is performed. The transmitting antenna 111 is in a mismatch state, and antenna switching needs to be performed. At this time, the control circuit 14 controls the state of the switching circuit 15 so that the first receiving transmitting channel and the first The receiving and transmitting antennas 112 are interconnected, and the second receiving channel is interconnected with the first receiving and transmitting antennas 111, thereby receiving and transmitting corresponding information through the second receiving and transmitting antennas 112 and the first receiving and transmitting channels, and through the first receiving The transmitting antenna 111 and the second receiving channel perform reception of corresponding information.

As the terminal moves, so that the terminal works under the 3G network, it is assumed that the corresponding working frequency band is C and the working channel is D. In this case, the mismatch parameter detecting circuit 16 does not detect the mismatch parameter of the second receiving transmitting antenna 112 when the terminal is not in the transmitting state, that is, when the 3G network is not used for the call or data service.

When the terminal is in a transmitting state, that is, using a 3G network for a call or data service, the reverse coupling circuit 161 couples the reflected signal generated by the second receiving transmitting antenna 112 by the mismatch, and sends the reflected signal to the power detecting circuit 1621; The detecting circuit 1621 detects the function of the reflected signal, and sends the analog signal of the detected power to the analog-to-digital converting circuit 1622; the analog-to-digital converting circuit 1622 converts the analog signal into a digital signal, thereby obtaining the second receiving transmitting antenna 112. Mismatch parameter; the control circuit 14 periodically acquires the mismatch parameter (K ₂ ) from the analog-to-digital conversion circuit 1622 (for example, 5 times per second, etc.), and obtains the mismatch parameter and the pre-stored working frequency band C, The working channel D and the preset threshold corresponding to the second receiving transmit antenna 112 are compared. If the duration of the mismatch parameter is greater than or equal to the corresponding preset threshold, the second receiving is performed. The transmitting antenna 112 is in a mismatch state, and antenna switching needs to be performed. At this time, the control circuit 14 controls the state of the switching circuit 15 so that the first receiving transmitting channel and the first A receiving transmitting antenna 111 interconnects, and interconnects the second receiving channel with the second receiving transmitting antenna 112, thereby receiving and transmitting corresponding information through the first receiving transmitting antenna 111 and the first receiving transmitting channel, and passing the second The receiving transmit antenna 112 and the second receiving channel receive the corresponding information.

As the terminal moves further, the terminal works in the 4G network, and it is assumed that the corresponding working frequency band is E and the working channel is F. In this case, when the terminal is not in the transmitting state, that is, when the 4G network is not used for the call or data service, the mismatch parameter detecting circuit 16 does not detect the mismatch parameter of the first receiving transmitting antenna 111.

When the terminal is in the transmitting state, that is, using the 4G network for the call or data service, the reverse coupling circuit 161 couples the reflected signal generated by the first receiving transmitting antenna 111 by the mismatch, and sends the reflected signal to the power detecting circuit 1621; The detecting circuit 1621 detects the function of the reflected signal, and sends the analog signal of the detected power to the analog-to-digital converting circuit 1622; the analog-to-digital converting circuit 1622 converts the analog signal into a digital signal, thereby obtaining the first receiving transmitting antenna 111. Mismatch parameter; the control circuit 14 periodically acquires the mismatch parameter (K ₁ ) from the analog-to-digital conversion circuit 1622 (for example, 5 times per second, etc.), and obtains the mismatch parameter and the pre-stored working frequency band E, The working channel F and the preset threshold corresponding to the first receiving transmitting antenna 111 are compared. If the duration of the mismatch parameter is greater than or equal to the corresponding preset threshold, the first received transmission is indicated. The antenna 111 is in a mismatch state, and antenna switching needs to be performed. At this time, the control circuit 14 controls the state of the switch circuit 15 so that the first receiving transmission channel and the second connection The transmitting antennas 112 are interconnected, and the second receiving channel is interconnected with the first receiving transmitting antenna 111, thereby receiving and transmitting corresponding information through the second receiving transmitting antenna 112 and the first receiving transmitting channel, and passing the first receiving The transmitting antenna 111 and the second receiving channel perform reception of corresponding information.

It should be noted that, in actual application, a preset threshold corresponding to each receiving transmitting antenna may be separately set for each working frequency band and a corresponding working channel, so that whether the receiving transmitting antenna interconnected with the first receiving transmitting channel is mismatched is determined. Will be more accurate. Among them, the way and implementation of the setup The setting in the second example is exactly the same.

Embodiment 4

Based on the foregoing terminal, the embodiment provides a method for antenna switching, including: controlling, by using a mismatch parameter of a receiving transmit antenna that is interconnected with a first receiving and transmitting channel of a terminal, to switch the first receiving and transmitting channel to the terminal. One of the at least two receive transmit antennas receives the transmit antenna interconnect.

The method may further include: when the first receiving and transmitting channel is switched to be interconnected with one of the at least two receiving and transmitting antennas of the terminal, the method may further include:

Specifically, by using the mismatch parameter, controlling, by controlling a state of the switch circuit of the terminal, the first receiving and transmitting channel is switched to receive, in addition to the mismatch parameter, among the at least two receiving transmit antennas And receiving a transmit antenna interconnect outside the transmit antenna; and controlling the second receive channel to switch to a receive transmit antenna corresponding to the mismatch parameter.

In an embodiment, the method may further include:

The detecting a mismatch parameter of the receiving transmit antenna that is interconnected with the first receiving and transmitting channel includes:

Determining, by the reflected signal coupled by the reverse coupling circuit, the first receiving transmission The mismatch parameter of the transmit and receive antennas of the track interconnect.

When a specific receiving transmitting antenna is used to describe the connection relationship between the first receiving transmitting channel and the second receiving channel and at least two receiving transmitting antennas, as shown in FIG. 7, the method includes the following steps:

Step 701: Determine, by using a mismatch parameter of the first receiving transmit antenna of the terminal, that antenna switching needs to be performed.

Here, before performing this step, the method may further include:

Detecting a mismatch parameter of the first receiving transmit antenna;

Correspondingly, determining, by using a mismatch parameter of the first receiving transmit antenna of the terminal, that antenna switching needs to be performed, specifically:

When the mismatch parameter is greater than or equal to a preset threshold, it is determined that antenna switching needs to be performed.

Wherein, when it is determined that the antenna switching needs to be performed, the first receiving transmitting antenna is in a mismatch state.

When the mismatch parameter is greater than or equal to the preset threshold, it indicates that the first receiving transmit antenna has poor matching, and the antenna switching needs to be performed; when the mismatch parameter is less than the preset threshold, the description is performed. A receiving transmit antenna has good matching and does not need to perform antenna switching.

The preset threshold may be set using a simulation result.

In actual application, the detecting the mismatch parameter of the first receiving and transmitting antenna includes:

Coupling a reflected signal generated by the first receiving transmit antenna by a mismatch;

A mismatch parameter of the first receive transmit antenna is determined using a reflected signal coupled by the reverse coupled circuit.

In an embodiment, the determining, by using the reflected signal coupled by the reverse coupling circuit, determining a mismatch parameter of the first receiving and transmitting antenna, specifically:

Step 702: Switching a first receiving transmission channel interconnected with a first receiving transmit antenna of the terminal to a second receiving transmitting antenna of the terminal; and interconnecting a second receiving transmitting antenna of the terminal The two receiving channels are switched to interconnect with the first receiving transmit antenna.

Here, the terminal is a terminal including at least two receiving transmit antennas, one transmitting circuit, and at least two receiving circuits;

The transmitting circuit and the first receiving circuit of the terminal are combined into one channel, which is called a first receiving transmitting channel; that is, the first receiving transmitting channel is the transmitting circuit and the first receiving And a receiving channel corresponding to the circuit; the second receiving channel is a receiving channel corresponding to the second receiving circuit of the terminal.

The transmitting circuit and the first receiving circuit form a receiving and transmitting circuit, and the receiving and transmitting circuit may be referred to as a main receiving and transmitting circuit, and is mainly configured to receive and demodulate and reverse link the forward link signal in wireless communication. The modulation, amplification and transmission of the road signal; correspondingly, the first receiving transmission channel corresponding to the receiving transmitting circuit may be referred to as a primary receiving transmitting channel.

The second receiving circuit is mainly configured to receive the diversity of the forward link signal, and complements the first receiving circuit to enhance the communication quality of the forward link or improve the throughput.

The at least two receive transmit antennas may be configured to transmit wireless communication information, or may be configured to receive wireless communication information.

Switching the first receiving transmission channel to be interconnected with the first receiving transmit antenna of the terminal The second receiving channel interconnected with the second receiving transmitting antenna of the terminal is switched to be interconnected with the first receiving transmitting antenna, specifically:

Switching a first receive transmit channel interconnected with the first receive transmit antenna to be interconnected with the second receive transmit antenna by controlling a state of a switch circuit of the terminal; and interconnecting the second receive transmit antenna The second receiving channel is switched to be interconnected with the first receiving transmit antenna.

In other words, a function of the switch circuit is to interconnect the first receive transmit channel with the first receive transmit antenna and interconnect the second receive channel with the second receive transmit antenna; Yet another function is to interconnect the first receive transmit channel with the second receive transmit antenna and interconnect the second receive channel with the first receive transmit antenna.

In an embodiment, before the detecting a mismatch parameter of the receiving transmit antenna that is interconnected with the first receiving transmit channel, the method may further include:

It should be noted that the first, second, ... used herein only represent different antennas, and the function of the antenna is not limited.

The method provided by the embodiment of the present invention controls the first receiving and transmitting channel to be switched to at least two receiving transmitting antennas of the terminal by using a mismatch parameter of the receiving transmitting antenna that is interconnected with the first receiving and transmitting channel of the terminal. A receiving transmit antenna interconnect allows for the full advantage of multiple antennas to improve communication quality.

In addition, controlling the second receiving pass of the terminal while controlling the first receiving transmit channel to switch to interconnect with one of the at least two receiving transmit antennas of the terminal The channel is switched to the receiving transmit antenna corresponding to the mismatch parameter, and thus, the advantages of multiple antennas can be further utilized to improve communication quality.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

A terminal, the terminal includes: at least two receiving transmit antennas; the terminal further includes: a control circuit;

The control circuit is configured to control the first receiving transmit channel to switch to one of the at least two receive transmit antennas by using a mismatch parameter of a receive transmit antenna interconnected with a first receive transmit channel of the terminal Receive transmit antenna interconnection.
The terminal according to claim 1, wherein the control circuit is further configured to control the first receiving transmission channel to switch to interconnect with one of the at least two receiving transmitting antennas to control the The second receiving channel of the terminal is switched to the receiving transmit antenna corresponding to the mismatch parameter; wherein

Before the switching, the second receiving channel is interconnected with the receiving transmitting antenna after the first receiving transmitting channel is switched.
The terminal according to claim 2, wherein the terminal further comprises: a switch circuit; wherein

The control circuit is configured to: control, by using the mismatch parameter, the first receiving transmit channel to switch to the at least two receive transmit antennas except the mismatch parameter by controlling a state of the switch circuit And receiving, by the corresponding receiving transmit antenna, a receiving transmit antenna; and controlling the second receiving channel to switch to a receiving transmit antenna corresponding to the mismatch parameter.
The terminal according to any one of claims 1 to 3, wherein the terminal further comprises: a mismatch parameter detecting circuit configured to detect a mismatch parameter of the receiving transmitting antenna interconnected with the first receiving transmitting channel, and Transmitting the detected mismatch parameter to the control circuit;

Correspondingly, the control circuit is further configured to: after receiving the mismatch parameter sent by the mismatch parameter detecting circuit, determine that the antenna switching needs to be performed when the mismatch parameter is greater than or equal to a preset threshold.
The terminal of claim 4, wherein the mismatch parameter detecting circuit comprises: a reverse coupling circuit and a mismatch parameter determination circuit; wherein

The reverse coupling circuit is configured to couple a reflected signal generated by a mismatch of a receiving transmit antenna interconnected with the first receiving transmit channel;

The mismatch parameter determining circuit is configured to determine a mismatch parameter of the receiving transmitting antenna interconnected with the first receiving transmitting channel by using the reflected signal coupled by the reverse coupling circuit, and send the mismatch parameter to the control circuit.
The terminal according to claim 5, wherein the mismatch parameter determining circuit comprises: a power detecting circuit and an analog to digital converting circuit; wherein

The power detection circuit is configured to detect a power of the reflected signal, and send an analog signal of the detected power to the analog to digital conversion circuit;

The analog-to-digital conversion circuit is configured to convert an analog signal of the power transmitted by the power detection circuit into a digital signal, obtain the mismatch parameter, and send the mismatch parameter to the control circuit.
The terminal according to claim 4, wherein the terminal further comprises a setting unit configured to adjust an impedance parameter of the adjustable load to a transmitting circuit standing wave ratio of the terminal to interconnect with the first receiving transmitting channel The receiving transmit antenna is in a mismatch state; and detecting a mismatch parameter of the receiving transmit antenna in a mismatched state, the preset threshold is obtained.
A method of antenna switching, the method comprising:

The first receive transmit channel is controlled to be switched to interconnect with one of the at least two receive transmit antennas of the terminal using a mismatch parameter of the receive transmit antenna interconnected with the first receive transmit channel of the terminal.
The method of claim 8 wherein when the controlling the first receive transmit channel is switched to interconnect with one of the at least two receive transmit antennas of the terminal, the method further comprises:

Controlling, by the second receiving channel of the terminal, to the receiving transmit antenna corresponding to the mismatch parameter; wherein

Before the switching, the second receiving channel is interconnected with the receiving transmitting antenna after the first receiving transmitting channel is switched.
The method of claim 9, wherein said controlling said first receive transmit channel is switched to interconnect with one of said at least two receive transmit antennas; and controlling said second receive channel of said terminal Switching to the receiving transmit antenna interconnect corresponding to the mismatch parameter is:

Controlling, by the control of the state of the switch circuit of the terminal, the first receive transmit channel to be switched to be outside the receive transmit antenna corresponding to the mismatch parameter of the at least two receive transmit antennas by using the mismatch parameter And receiving a transmit antenna interconnect; and controlling the second receive channel to switch to a receive transmit antenna corresponding to the mismatch parameter.
The method of any of claims 8 to 10, wherein the method further comprises:

Detecting a mismatch parameter of the receiving transmit antenna interconnected with the first receive transmit channel;

Correspondingly, when the mismatch parameter is greater than or equal to a preset threshold, it is determined that antenna switching needs to be performed.
The method of claim 11 wherein said detecting a mismatch parameter of a receive transmit antenna interconnected with said first receive transmit channel comprises:

Generating a reflected signal generated by the mismatch of the receiving transmit antenna interconnected with the first receiving transmit channel;

A mismatch parameter of the receive transmit antenna interconnected with the first receive transmit channel is determined using the reflected signal coupled by the reverse coupled circuit.
The method of claim 12, wherein the determining, by the reflected signal coupled by the reverse coupling circuit, a mismatch parameter of a receive transmit antenna interconnected with the first receive transmit channel is:

Detecting the power of the reflected signal to obtain an analog signal of power;

The analog signal of power is converted to a digital signal to obtain the mismatch parameter.
The method of claim 11, wherein the method further comprises: before detecting the mismatch parameter of the receive transmit antenna interconnected with the first receive transmit channel, the method further comprising:

Adjusting an impedance parameter of the adjustable load to a transmit circuit standing wave ratio of the terminal, so that the receive transmit antenna interconnected with the first receive transmit channel is in a mismatch state;

The mismatch parameter of the receiving transmit antenna in the mismatch state is detected to obtain the preset threshold.