WO2019140698A1

WO2019140698A1 - Method and device for controlling bandwidth of loop filter

Info

Publication number: WO2019140698A1
Application number: PCT/CN2018/073663
Authority: WO
Inventors: 冷鹏; 朱先成
Original assignee: 海能达通信股份有限公司
Priority date: 2018-01-22
Filing date: 2018-01-22
Publication date: 2019-07-25

Abstract

Disclosed by the present application are a method and apparatus for controlling the bandwidth of a loop filter. Said method is applied to a first communication terminal and comprises: receiving a signal from a second communication terminal; detecting the signal strength of a signal from the second communication terminal; determining whether the signal strength is greater than a preset strength threshold; and if the signal strength is greater than the preset strength threshold, reducing a current signal bandwidth of the loop filter of the first communication terminal to a first signal bandwidth. According to the present invention, the bandwidth of the loop filter is dynamically configured according to the transmission and reception state, the working standard, the signal strength RSSI value, the current bandwidth and the like of the loop filter, thus the bandwidth of the loop filter may be dynamically configured, improving the performance of the communication terminal, and improving the anti-interference capability for communication.

Description

Loop filter bandwidth control method and device

【技术领域】[Technical Field]

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for controlling a bandwidth of a loop filter.

【背景技术】【Background technique】

The loop filter is an important part of the frequency generating unit. At the same time, the loop filter bandwidth is one of the determinants of the closed-loop phase noise index. In the case of a fixed voltage controlled oscillator (VCO), the wider the loop filter bandwidth and the worse the out-of-band phase noise, the worse the adjacent channel selectivity, blocking, adjacent channel power ratio of the communication system.

In current wireless communication systems, when the communication system switches channels, the loop filter bandwidth is changed accordingly to speed up the lock. After the lock, the bandwidth of the loop filter is fixed, and it does not dynamically affect the neighboring channel selectivity, blocking, and adjacent channel power ratio of the communication system. On the other hand, the closer the communication system is, the relatively narrow indicators such as adjacent channel selectivity, blocking, and adjacent channel power ratio. When the limit of the indicator is exceeded, the communication system will beep or communication interruption.

That is to say, in the current communication system, the bandwidth of the loop filter cannot be dynamically configured, the performance of the communication terminal is not good, and the anti-interference ability of the communication is poor.

Therefore, it is especially necessary to provide a new control method for the bandwidth of the loop filter.

【发明内容】 [Summary of the Invention]

The technical problem to be solved by the present application is to provide a method and a device for controlling the bandwidth of a loop filter, which can dynamically configure the bandwidth of the loop filter, improve the performance of the communication terminal, and improve the anti-interference ability of the communication.

In order to solve the above technical problem, the first aspect of the present application provides a method for controlling a bandwidth of a loop filter, which is applied to a first communication terminal, including: receiving a signal from a second communication terminal; and detecting a signal from the second communication terminal a signal strength; determining whether the signal strength is greater than an intensity preset threshold; if the signal strength is greater than the intensity preset threshold, reducing a current signal bandwidth of the loop filter of the first communication terminal to The first signal bandwidth.

With reference to the first aspect, in a first possible implementation manner of the first aspect, if the signal strength is greater than the strength preset threshold, the current signal of the loop filter of the first communications terminal is The step of reducing the bandwidth to the first signal bandwidth includes: if the signal strength is greater than the strength preset threshold, determining whether the signal bandwidth is less than a preset bandwidth; if the signal bandwidth is greater than the preset bandwidth, The loop filter switches to a filtering mode that is less than the first signal bandwidth of the signal bandwidth.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the first communication is performed if the signal strength is greater than the strength preset threshold The step of reducing the current signal bandwidth of the loop filter of the terminal to the first signal bandwidth further comprises: obtaining a signal strength after reducing the current signal bandwidth to the first signal bandwidth; determining whether the signal strength is greater than the An intensity preset threshold, if the intensity preset threshold is greater, maintaining a first signal bandwidth of the loop filter; if less than the intensity preset threshold, increasing a signal bandwidth of the loop filter To the second signal bandwidth.

In conjunction with the first aspect, or the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the control method further includes: if the signal strength is not greater than the strength preset threshold, Maintain the signal bandwidth of the current loop filter.

In conjunction with the first aspect, in a fourth possible implementation of the first aspect, the current signal bandwidth is determined by the first communication terminal according to a current communication mode.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, when the first communication terminal is to send a signal to the second communication terminal, according to a loop filter of the first communication terminal The current signal bandwidth determines a signal bandwidth of the loop filter that the first communication terminal transmits to the second communication terminal.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, when the current signal bandwidth of the loop filter of the first communications terminal is lower than a bandwidth preset threshold And maintaining a current signal bandwidth of the loop filter of the first communication terminal for transmitting a signal to the second communication terminal.

In conjunction with the fifth possible implementation of the first aspect, in a seventh possible implementation of the first aspect, when the current signal bandwidth of the loop filter of the first communication terminal is higher than or equal to the bandwidth pre- When a threshold is set, a signal bandwidth of a loop filter of the first communication terminal is determined for transmitting a signal to the second communication terminal according to a communication mode with the second communication terminal.

In conjunction with the seventh possible implementation of the first aspect, in an eighth possible implementation of the first aspect, if the communication mode with the second communication terminal is a digital mode, maintaining the loop filter a current signal bandwidth for transmitting a signal to the second communication terminal;

If the communication mode with the second communication terminal is an analog mode, reducing a current signal bandwidth of the loop filter to a first signal bandwidth for transmitting a signal to the second communication terminal.

In conjunction with the fifth possible implementation of the first aspect, in a ninth possible implementation manner of the first aspect, the signal bandwidth of the loop filter of the first communications terminal is determined to be the first communications The current signal bandwidth of the loop filter of the terminal.

In order to solve the above technical problem, a second aspect of the present application provides a method for controlling a bandwidth of a loop filter, including: determining, by a first communication terminal, a communication mode with a second communication terminal to be communicated, and determining the present according to the communication mode a signal bandwidth of the secondary call loop filter; establishing communication with the second communication terminal according to the signal bandwidth, so that the second communication terminal determines whether the signal strength of the current communication is greater than an intensity preset threshold, and When the signal strength is greater than the intensity preset threshold, the current signal bandwidth of the loop filter is reduced.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the first communications terminal determines a communication mode with the second communications terminal to be communicated, and determines the current call loop filtering according to the communications mode The step of the signal bandwidth of the device includes: determining, by the first communication terminal, whether the communication mode of the second communication terminal to be communicated is an analog communication mode or a digital communication mode; if the digital mode is, increasing the loop The current signal bandwidth of the filter to the third signal bandwidth; if in the analog mode, the current signal bandwidth of the loop filter is reduced to the first signal bandwidth.

In order to solve the above technical problem, a third aspect of the present application provides a communication terminal, where the communication terminal includes: a receiver for receiving signals from other communication terminals; and a detector for detecting signal strength of signals from other communication terminals a determining module, configured to determine whether the signal strength is greater than an intensity preset threshold; and a regulator, configured to reduce the loop of the first communication terminal when the signal strength is greater than the intensity preset threshold The current signal bandwidth of the filter.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the communications terminal further includes: a transmitter, configured to send a signal to the other communications terminal, and a determining module, configured to: when the communications terminal is to be When the other communication terminal transmits a signal, the signal bandwidth of the loop filter used by the communication terminal to send a signal to the other communication terminal is determined according to the current signal bandwidth of the loop filter of the communication terminal.

In order to solve the above technical problem, a fourth aspect of the present application provides a communication terminal, where the communication terminal includes: a communication circuit, a memory, and a processor; the communication circuit is configured to transmit an instruction; and the memory is configured to store the processor An executed computer program and intermediate data generated when the computer program is executed; and when the processor executes the computer program, implementing the above-described loop filter bandwidth control method.

The utility model has the beneficial effects that the bandwidth of the loop filter is dynamically configured according to the transmission and reception state, the working system, the signal strength RSSI value and the current bandwidth of the loop filter, and the ring can be dynamically configured according to the prior art. The bandwidth of the road filter improves the performance of the communication terminal and improves the anti-interference ability of the communication.

【附图说明】 [Description of the Drawings]

1 is a schematic structural diagram of an embodiment of a loop filter bandwidth control system of the present application;

2 is a schematic flowchart of a first embodiment of a method for controlling a loop filter bandwidth according to the present application;

3 is a schematic flow chart of a specific implementation manner of a method for controlling a bandwidth of a loop filter of FIG. 2;

4 is a schematic flow chart of a second embodiment of a method for controlling a loop filter bandwidth according to the present application;

5 is a schematic flow chart of another specific implementation manner of a method for controlling bandwidth of a loop filter of the present application;

6 is a schematic structural diagram of a first embodiment of a communication terminal according to the present application;

7 is a schematic structural diagram of a second embodiment of a communication terminal according to the present application;

8 is a schematic structural diagram of a third embodiment of a communication terminal according to the present application;

9 is a schematic structural diagram of a fourth embodiment of a communication terminal according to the present application;

10 is an experimental data table of an embodiment of a method for controlling a bandwidth of a loop filter of the present application.

【具体实施方式】【Detailed ways】

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without departing from the inventive scope are the scope of the present application.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an embodiment of a loop filter bandwidth control system of the present application.

As shown in FIG. 1, the control system of the loop filter bandwidth of the present embodiment includes a first communication terminal 10 and a second communication terminal 11. The first communication terminal 10 includes any one of a smart phone, a tablet computer, a smart TV, and other smart devices, such as a smart watch. The second communication terminal 11 includes a smart phone, a tablet computer, a smart TV, a communication base station, and other smart devices. There is no limit here. The first communication terminal 10 and the second communication terminal 11 each include a loop filter, and the bandwidth of the loop filter includes a first signal bandwidth, a second signal bandwidth, and a third signal bandwidth, the first signal bandwidth is a narrow bandwidth, and the second The signal bandwidth is a normal bandwidth, and the third signal bandwidth is a wide bandwidth. The communication terminal can control the bandwidth of the loop filter to switch between the first signal bandwidth, the second signal bandwidth, and the third signal bandwidth.

In the present embodiment, the second communication terminal 11 transmits a signal to the first communication terminal 10, and the first communication terminal 10 receives the signal transmitted by the second communication terminal 11.

Specifically, the second communication terminal 11 determines a communication mode with the first communication terminal 10 to be communicated, and determines a signal bandwidth of the current call loop filter according to the communication mode; and then establishes communication with the first communication terminal 10 according to the signal bandwidth. Sending a signal to the first communication terminal 10. The first communication terminal 10 receives a signal from the second communication terminal 11 and detects the signal strength of the signal from the second communication terminal 11. Then, the first communication terminal 10 determines whether the signal strength is greater than the intensity preset threshold; if the signal strength is greater than the intensity preset threshold, the first communication terminal 10 reduces the current signal bandwidth of the loop filter of the first communication terminal 10 to the first A signal bandwidth.

In order to clearly illustrate how the above detection system works, please refer to Figures 2 and 3. 2 is a schematic flowchart of a first embodiment of a method for controlling a bandwidth of a loop filter according to the present application, and FIG. 3 is a schematic flowchart of a specific implementation manner of a method for controlling a bandwidth of a loop filter of FIG. 2.

As shown in FIG. 2, the method for controlling the bandwidth of the loop filter of this embodiment includes the following steps:

S201: Receive a signal from the second communication terminal.

The first communication terminal includes a smart phone, a tablet computer, a smart TV, and other smart devices, such as any one of smart watches, and the second communication terminal includes a smart phone, a tablet computer, a smart TV, a communication base station, and other smart devices. There is no limit here. The first communication terminal and the second communication terminal each include a loop filter, and the bandwidth of the loop filter includes a first signal bandwidth, a second signal bandwidth, and a third signal bandwidth, the first signal bandwidth is a narrow bandwidth, and the second signal bandwidth is a second signal bandwidth. For normal bandwidth, the third signal bandwidth is a wide bandwidth, and the communication terminal can control the bandwidth of the loop filter to switch between the first signal bandwidth, the second signal bandwidth, and the third signal bandwidth.

In this embodiment, the first communication terminal receives the signal, the second communication terminal transmits a signal, and the first communication terminal receives the signal transmitted by the second communication terminal.

S202: Detect a signal strength of a signal from the second communication terminal.

In this embodiment, the signal strength passes the RSSI value (Received Signal Strength) Indicator) indicates that the RSSI value is the strength indication value of the received signal, and its implementation is performed after the reverse channel baseband reception filter.

In a specific embodiment, after receiving the signal transmitted by the second communication terminal, the first communication terminal detects the RSSI value of the signal from the second communication terminal.

S203: Determine whether the signal strength is greater than an intensity preset threshold.

In this embodiment, the intensity preset threshold is determined according to the performance of the system, and for the convenience indication, the intensity preset threshold is represented by n.

The first communication terminal acquires the RSSI value communicated with the second communication terminal, and compares the RSSI value with the intensity preset threshold n.

S204: If the signal strength is greater than the intensity preset threshold, reduce the current signal bandwidth of the loop filter of the first communication terminal to the first signal bandwidth.

In a specific embodiment, the current signal bandwidth is determined by the first communication terminal based on the current communication mode.

In a specific embodiment, when the first communication terminal is to send a signal to the second communication terminal, determining, according to the current signal bandwidth of the loop filter of the first communication terminal, that the first communication terminal sends a signal to the second communication terminal. The signal bandwidth of the loop filter.

Further, when the current signal bandwidth of the loop filter of the first communication terminal is lower than the bandwidth preset threshold, the current signal bandwidth of the loop filter of the first communication terminal is maintained for transmitting signals to the second communication terminal. . The bandwidth preset threshold is determined according to the actual situation. In this implementation manner, the first signal bandwidth is lower than the bandwidth preset threshold, the second signal bandwidth is equal to or greater than the bandwidth preset threshold, and the third signal bandwidth is greater than the bandwidth preset threshold. For example, since the first signal bandwidth is lower than the bandwidth preset threshold, it belongs to a narrow bandwidth. When the first communication terminal switches from the receiving state to the transmitting state when the loop filter bandwidth is the first signal bandwidth, it indicates that the transmitted distance is very close. At this time, the first signal bandwidth is transmitted through the analog mode to improve the ACP (adjacent channel power) performance, and the interference of the first communication terminal to the outside is reduced.

Determining a signal bandwidth of a loop filter of the first communication terminal according to a communication mode with the second communication terminal when the current signal bandwidth of the loop filter of the first communication terminal is higher than or equal to the bandwidth preset threshold The second communication terminal transmits a signal. Determining, by the first communication terminal, whether the communication mode of the second communication terminal to be communicated is an analog communication mode or a digital communication mode; if it is a digital mode, increasing a current signal bandwidth of the loop filter to a third signal bandwidth; If in analog mode, the current signal bandwidth of the loop filter is reduced to the first signal bandwidth.

In a more specific implementation manner, since the second signal bandwidth is equal to or greater than the bandwidth preset threshold, the third signal bandwidth is greater than the bandwidth preset threshold, and the signal needs to be sent according to the communication mode, if the current transmission format is the digital mode, The ACP is less affected by the bandwidth of the loop filter, and the wider the loop, the smaller the bit error rate and the farther the communication distance. Therefore, increasing the signal bandwidth of the loop filter to the third signal bandwidth can effectively reduce the bit error rate, improve the communication distance, and improve the performance of the communication system. If the current transmission system is in analog mode, the ACP is greatly affected by the bandwidth of the loop filter. The communication system switches from the receiving state to the transmitting state when the loop filter bandwidth is the second signal bandwidth, and the loop filter bandwidth needs to be reduced to the first signal bandwidth, which can reduce the impact of the ACP and improve the performance of the communication system.

In another specific embodiment, the signal bandwidth of the loop filter of the first communication terminal is determined to be the current signal bandwidth of the loop filter of the first communication terminal. For example, if the communication system switches from the receiving state to the transmitting state when the loop filter bandwidth is the second signal bandwidth (ie, the normal bandwidth), the communication distance is far, and the analog transmission uses the loop filter of the normal bandwidth. For a clear description of the process of the loop filter bandwidth control method of the above embodiment, refer to FIG. 3, which is a schematic flowchart of a specific implementation manner of the loop filter bandwidth control method of FIG. 2, as shown in FIG. The first communication terminal performs the following steps:

Step 340: Power on. The first communication terminal performs step 301 after being powered on.

Step 301: Switch the channel and in the receiving state, the loop filter locks the second signal bandwidth to obtain the signal strength of the communication system. That is, in the state in which the first communication terminal receives the signal, the current bandwidth of the loop filter is a normal bandwidth, and at this time, the current RSSI value and the current bandwidth are acquired.

Step 302: Determine whether the signal strength is greater than an intensity preset threshold.

If the signal strength is greater than the intensity preset threshold n, then step 303 is performed. If the signal strength is not greater than the intensity preset threshold, step 321 is performed. The intensity preset threshold is a signal strength threshold for no whistling between the communication systems, that is, if the signal strength is greater than the intensity preset threshold, the communication systems may interfere with each other to cause whistling.

Step 303: The first communication terminal performs a step of switching to the first signal bandwidth.

If the RSSI value is greater than the intensity preset threshold n, the distance between the two communication systems is very close, and the anti-interference ability needs to be improved. At this time, the current signal bandwidth of the loop filter is reduced from the second signal bandwidth to the first signal bandwidth, the phase noise is correspondingly improved, the corresponding adjacent channel selectivity and blocking performance are improved, and the anti-interference performance is improved.

Step 304: Determine whether the signal strength is greater than an intensity preset threshold.

The process of the judgment is the same as the step 302, and details are not described herein again.

If the signal strength is greater than the intensity preset threshold, step 305 is performed. If the signal strength is not greater than the intensity preset threshold, step 311 is performed.

Step 305: Maintain the first signal bandwidth.

If the RSSI value is greater than the intensity preset threshold n, the distance between the two communication systems is very close, and the anti-interference ability needs to be improved. At this point, the loop filter is maintained at the first signal bandwidth and the interference immunity of the communication system can be maintained.

Step 311: Switch to the second signal bandwidth.

At this time, the distance between the two communication systems is very long, and it is necessary to continue to maintain the loop filter bandwidth as the second signal bandwidth to ensure the communication distance.

After the first communication terminal performs step 311, the step 302 is repeated to determine the signal strength to achieve the purpose of dynamically adjusting the signal bandwidth of the loop filter, and improving the anti-interference capability of the communication.

Step 321: Maintain the second signal bandwidth. The RSSI value is not greater than the strength preset threshold n, indicating that the distance between the two communication systems is very long, and then the loop filter bandwidth is kept unchanged for the second signal bandwidth.

After the first communication terminal performs steps 305 and 321 , step 306 is performed to switch channels. The state of the communication system is switched to the state in step 301 by switching channels.

To further clarify the operation of the above detection system, please refer to Figure 4.

4 is a schematic flow chart of a second embodiment of a loop filter bandwidth control method of the present application.

Figure.

As shown in FIG. 4, the method for controlling the bandwidth of the loop filter of this embodiment includes the following steps:

S401: The first communication terminal determines a communication mode with the second communication terminal to be communicated, and determines a signal bandwidth of the current call loop filter according to the communication mode.

The first communication terminal includes a smart phone, a tablet computer, a smart TV, and other smart devices, such as any one of smart watches, and the second communication terminal includes a smart phone, a tablet computer, a smart TV, a communication base station, and other smart devices. There is no limit here. The first communication terminal and the second communication terminal each include a loop filter, and the bandwidth of the loop filter includes a first signal bandwidth, a second signal bandwidth, and a third signal bandwidth, the first signal bandwidth is a narrow bandwidth, and the second signal is The normal bandwidth, the third signal bandwidth is a wide bandwidth, and the communication terminal can control the bandwidth of the loop filter to switch between the first signal bandwidth, the second signal bandwidth, and the third signal bandwidth.

In the present embodiment, the communication mode includes a digital mode and an analog mode. In digital mode, ACP (adjacent channel power) is less affected by the bandwidth of the loop filter, and the wider the bandwidth of the loop filter, the smaller the bit error rate and the farther the communication distance. In analog mode, ACP is greatly affected by the bandwidth of the loop filter.

S402: Establish communication with the second communication terminal according to the signal bandwidth, so that the second communication terminal determines whether the signal strength of the current communication is greater than an intensity preset threshold, and reduces the loop filter when the signal strength is greater than the intensity preset threshold. Current signal bandwidth.

Please refer to Figure 5. FIG. 5 is a schematic flow chart of another specific implementation manner of a method for controlling a bandwidth of a loop filter of the present application. The first communication terminal performs the following steps:

Step 540: Power on. The first communication terminal performs step 501 after being powered on. The steps in the subsequent receiving state are similar to the steps in FIG. 3, and the details are not described herein again.

When the first communication terminal performs step 505 or step 521, it switches to the transmitting state. Before the first communication terminal switches from the receiving state to the transmitting state, it is necessary to determine the current signal bandwidth of the loop filter, and determine the next step according to the current signal bandwidth. If the first communication terminal turns on the transmission if the signal bandwidth of the loop filter is the second signal bandwidth, then step 522 is performed to transmit the signal. If the first communication terminal turns on the transmission if the signal bandwidth of the loop filter is the first signal bandwidth, the first communication terminal performs step 512: transmitting the signal.

Step 522: transmitting a signal. That is, the first communication terminal turns on the transmission if the signal bandwidth of the loop filter is the second signal bandwidth.

Step 523: Determine whether the current transmission system is an analog mode or a digital mode.

If the current transmission system is in the digital mode, then step 524 is performed: switching to the third signal bandwidth. If the pre-launch mode is the analog mode, step 525 is performed: switching to the first signal bandwidth.

Step 524: Switch to the third signal bandwidth.

Since the current transmission system is in the digital mode, the ACP is less affected by the bandwidth of the loop filter, and the wider the loop, the smaller the bit error rate and the farther the communication distance. Therefore, increasing the signal bandwidth of the loop filter to the third signal bandwidth can effectively reduce the bit error rate, improve the communication distance, and improve the performance of the communication system.

Step 525: Switch to the first signal bandwidth.

When the current transmission system is in analog mode, ACP is greatly affected by the bandwidth of the loop filter. The communication system switches from the receiving state to the transmitting state when the loop filter bandwidth is the second signal bandwidth, and the loop filter bandwidth needs to be reduced to the first signal bandwidth, which can reduce the impact of the ACP and improve the performance of the communication system. In other embodiments, if the communication system switches from the receiving state to the transmitting state when the loop filter bandwidth is the second signal bandwidth, indicating that the communication distance is far, the analog transmission can also use a normal loop filter.

Step 512: Transmitting a signal. That is, the first signal bandwidth is maintained to transmit signals through the analog mode.

Step 525: Switch to the first signal bandwidth.

At this time, since the communication system switches from the receiving state to the transmitting state when the loop filter bandwidth is the first signal bandwidth, the transmitting distance is very close. At this time, the first signal bandwidth is maintained to transmit signals in the analog mode to improve the ACP performance and reduce the interference of the first communication terminal to the outside.

After the first communication terminal performs step 524 or step 525, step 526 is executed according to the control instruction: the transmission is turned off. That is, the first communication terminal turns off the transmitting state, and the second communication terminal turns on the receiving state to continue to perform step 501.

Different from the prior art, the present application dynamically configures the bandwidth of the loop filter according to the transmission and reception state of the loop filter, the working system, the signal strength RSSI value, and the current bandwidth, and can dynamically configure the bandwidth of the loop filter and improve the bandwidth. The performance of the communication terminal improves the anti-interference ability of the communication.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a first embodiment of a communication terminal according to the present application. The communication terminal of the present embodiment is a first communication terminal for communicating with the second communication terminal. The first communication terminal 60 includes: a communication circuit 63, a memory 61 and a processor 62; the communication circuit 63 is configured to transmit an instruction; The computer program executed by the storage processor 62 and the intermediate data generated when the computer program is executed; when the processor 62 executes the computer program, the control method of the loop filter bandwidth of any of the following is implemented.

The first communication terminal 60 includes a smart phone, a tablet computer, a smart TV, and other smart devices, such as any one of smart watches, and the second communication terminal includes a smart phone, a tablet computer, a smart TV, a communication base station, and other smart devices. , not limited here. The first communication terminal 60 and the second communication terminal each include a loop filter, and the bandwidth of the loop filter includes a first signal bandwidth, a second signal bandwidth, and a third signal bandwidth, the first signal bandwidth is a narrow bandwidth, and the second signal is For normal bandwidth, the third signal bandwidth is a wide bandwidth, and the communication terminal can control the bandwidth of the loop filter to switch between the first signal bandwidth, the second signal bandwidth, and the third signal bandwidth.

3 and 6, in a specific embodiment, processor 62 performs the following steps:

Step 340: Power on. The first communication terminal 60 performs step 301 after powering on.

Step 301: The processor 62 switches the channel and the loop filter locks the second signal bandwidth when the communication circuit 63 is in the receiving state, and acquires the signal strength of the communication system. That is, the processor 62 is in the state where the communication circuit 63 is in the received signal, and the current bandwidth of the loop filter is the normal bandwidth. At this time, the processor 62 acquires the current RSSI value and the current bandwidth.

Step 302: The processor 62 determines whether the signal strength is greater than an intensity preset threshold.

If the signal strength is greater than the intensity preset threshold n, then step 303 is performed. If the signal strength is not greater than the intensity preset threshold, processor 62 performs step 321 . The intensity preset threshold is a signal strength threshold for no whistling between the communication systems, that is, if the signal strength is greater than the intensity preset threshold, the communication systems may interfere with each other to cause whistling.

If the RSSI value is greater than the intensity preset threshold n, the distance between the two communication systems is very close, and the anti-interference ability needs to be improved. At this time, the processor 62 reduces the current signal bandwidth of the loop filter from the second signal bandwidth to the first signal bandwidth, and the phase noise is correspondingly improved, the corresponding adjacent channel selectivity and blocking performance are improved, and the anti-interference performance is improved. .

The process of the processor 62 is the same as that of step 302, and details are not described herein again.

If the signal strength is greater than the intensity preset threshold, processor 62 performs step 305. If the signal strength is not greater than the intensity preset threshold, processor 62 performs step 311.

Step 305: Maintain the first signal bandwidth.

Step 311: Switch to the second signal bandwidth.

After the first communication terminal performs step 311, the processor 62 repeats the step 302 to determine the signal strength to achieve the purpose of dynamically adjusting the signal bandwidth of the loop filter, and improving the anti-interference capability of the communication.

After the processor 62 performs steps 305 and 321 , step 306 is performed to switch channels. The state of the communication system is switched to the state in step 301 by switching channels.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a second embodiment of a communication terminal according to the present application.

In this embodiment, the communication terminal is a first communication terminal for communicating with the second communication terminal. The first communication terminal 70 includes: a communication circuit 73, a memory 71, and a processor 72; the communication circuit 73 is for transmitting instructions; and the memory 71 is for storing a computer program executed by the processor 72 and intermediate data generated when the computer program is executed; When the processor 72 executes a computer program, a method of controlling the loop filter bandwidth of any of the following is implemented.

The first communication terminal 70 includes a smart phone, a tablet computer, a smart TV, and other smart devices, such as any one of smart watches, and the second communication terminal includes a smart phone, a tablet computer, a smart TV, a communication base station, and other smart devices. , not limited here. The first communication terminal 70 and the second communication terminal each include a loop filter, and the bandwidth of the loop filter includes a first signal bandwidth, a second signal bandwidth, and a third signal bandwidth, the first signal bandwidth is a narrow bandwidth, and the second signal is For normal bandwidth, the third signal bandwidth is a wide bandwidth, and the communication terminal can control the bandwidth of the loop filter to switch between the first signal bandwidth, the second signal bandwidth, and the third signal bandwidth.

The processor 72 acquires a communication mode in which the first communication terminal determines the second communication terminal to be communicated, and determines a signal bandwidth of the current call loop filter according to the communication mode.

The processor 72 establishes communication between the first communication terminal 70 and the second communication terminal according to the signal bandwidth, so that the second communication terminal determines whether the signal strength of the current communication is greater than an intensity preset threshold, and when the signal strength is greater than the intensity preset threshold. , reducing the current signal bandwidth of the loop filter.

Please refer to FIG. 8. FIG. 8 is a schematic structural diagram of a third embodiment of a communication terminal according to the present application.

As shown in FIG. 8, the communication terminal of the present embodiment is a first communication terminal 80. The first communication terminal 80 includes a receiver 81, a detector 82, a determination module 83, and a regulator 84. The receiver 81 is configured to receive signals from other communication terminals; the detector 82 is configured to detect signal strengths of signals from other communication terminals; the determination module 83 is configured to determine whether the signal strength is greater than an intensity preset threshold; and the regulator 84 is configured to When the intensity is greater than the intensity preset threshold, the current signal bandwidth of the loop filter of the first communication terminal 80 is reduced. The first communication terminal 80 implements the above-described control method of the loop filter bandwidth.

Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of a fourth embodiment of a communication terminal according to the present application. As shown in FIG. 9, the communication terminal of the present embodiment is a first communication terminal 90. The first communication terminal 90 includes a receiver 91, a detector 92, a determination module 93, a regulator 94, a transmitter 95, and a determination module 96. The receiver 91 is configured to receive signals from other communication terminals; the detector 92 is configured to detect signal strengths of signals from other communication terminals; the determination module 93 is configured to determine whether the signal strength is greater than an intensity preset threshold; the regulator 94 is used to signal When the intensity is greater than the intensity preset threshold, the current signal bandwidth of the loop filter of the first communication terminal 90 is reduced; the transmitter 95 is configured to send signals to other communication terminals; and the determining module 96 is configured to when the first communication terminal 90 is to When the other communication terminal transmits a signal, the signal bandwidth of the loop filter used by the first communication terminal 90 to transmit signals to other communication terminals is determined according to the current signal bandwidth of the loop filter of the first communication terminal 90. The first communication terminal 90 implements the above-described control method of the loop filter bandwidth.

Please refer to FIG. 10. FIG. 10 is an experimental data table of an embodiment of a loop filter bandwidth control method according to the present application.

As shown in Figure 10, the loop bandwidth is changed by changing the configuration of the pump current, which significantly improves the howling of close-range calls. The howling problem can be optimized from 1.5-2 meters to less than 1 meter. TX The FSK Err is better and can improve the communication distance of more than 100 meters.

In the several embodiments provided by the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the device implementations described above are merely illustrative. For example, the division of modules or units is only one logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

An integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the various embodiments of the present application.

The above is only the embodiment of the present application, and thus does not limit the scope of patents of the present application, and the equivalent structure or equivalent process transformation made by using the specification and the contents of the drawings, or directly or indirectly applied to other related technical fields, The same is included in the scope of patent protection of this application.

Claims

A method for controlling a bandwidth of a loop filter is characterized in that it is applied to a first communication terminal, including:

Receiving a signal from the second communication terminal;

Detecting a signal strength of a signal from the second communication terminal;

Determining whether the signal strength is greater than a strength preset threshold;

If the signal strength is greater than the intensity preset threshold, reducing a current signal bandwidth of the loop filter of the first communication terminal to a first signal bandwidth.
The control method according to claim 1, wherein if the signal strength is greater than the intensity preset threshold, the current signal bandwidth of the loop filter of the first communication terminal is reduced to The step of the first signal bandwidth specifically includes:

If the signal strength is greater than the intensity preset threshold, determining whether the signal bandwidth is less than a preset bandwidth;

If the signal bandwidth is greater than the predetermined bandwidth, the loop filter is switched to a filtering mode that is less than the first signal bandwidth of the signal bandwidth.
The control method according to claim 1 or 2, wherein the current signal bandwidth of the loop filter of the first communication terminal is reduced if the signal strength is greater than the intensity preset threshold The steps as small as the first signal bandwidth further include:

Obtaining a signal strength after reducing a current signal bandwidth to a first signal bandwidth;

Determining whether the signal strength is greater than the intensity preset threshold, if greater than the intensity preset threshold, maintaining a first signal bandwidth of the loop filter; if less than the intensity preset threshold, The signal bandwidth of the loop filter is increased to the second signal bandwidth.
The control method according to claim 1 or 2, wherein the control method further comprises:

If the signal strength is not greater than the intensity preset threshold, the signal bandwidth of the current loop filter is maintained.
The control method according to claim 1, wherein the current signal bandwidth of the loop filter is determined by the first communication terminal according to a current communication mode.
The control method according to claim 1, wherein when said first communication terminal is to transmit a signal to said second communication terminal, said current signal according to said loop filter of said first communication terminal The bandwidth is used to determine a signal bandwidth of the loop filter that the first communication terminal transmits to the second communication terminal.
The control method according to claim 6, wherein when the current signal bandwidth of the loop filter of the first communication terminal is lower than a bandwidth preset threshold, the ring of the first communication terminal is maintained The current signal bandwidth of the path filter is used to send a signal to the second communication terminal.
The control method according to claim 6, wherein when the current signal bandwidth of the loop filter of the first communication terminal is higher than or equal to a bandwidth preset threshold, according to the second communication terminal The communication mode determines a signal bandwidth of a loop filter of the first communication terminal for transmitting a signal to the second communication terminal.
The control method according to claim 8, wherein

Maintaining a current signal bandwidth of the loop filter for transmitting a signal to the second communication terminal if a communication mode with the second communication terminal is a digital mode;

If the communication mode with the second communication terminal is an analog mode, reducing a current signal bandwidth of the loop filter to a first signal bandwidth for transmitting a signal to the second communication terminal.
The control method according to claim 6, wherein a signal bandwidth of said loop filter of said first communication terminal is determined as said current signal bandwidth of said loop filter of said first communication terminal .
A method for controlling a bandwidth of a loop filter, comprising:

Determining, by the first communication terminal, a communication mode of the second communication terminal to be communicated, and determining a signal bandwidth of the current call loop filter according to the communication mode;

Establishing communication with the second communication terminal according to the signal bandwidth, so that the second communication terminal determines whether the signal strength of the current communication is greater than an intensity preset threshold, and the signal strength is greater than the intensity preset threshold. The current signal bandwidth of the loop filter is reduced.
The control method according to claim 11, wherein said first communication terminal determines a communication mode with a second communication terminal to be communicated, and determines a signal bandwidth of the current call loop filter according to said communication mode The steps specifically include:

Determining, by the first communication terminal, whether the communication mode of the second communication terminal to be communicated is an analog communication mode or a digital communication mode;

If in the digital mode, increasing the current signal bandwidth of the loop filter to a third signal bandwidth;

If in the analog mode, the current signal bandwidth of the loop filter is reduced to a first signal bandwidth.
A communication terminal, characterized in that the communication terminal comprises:

a receiver for receiving signals from other communication terminals;

a detector for detecting signal strength of signals from other communication terminals;

a determining module, configured to determine whether the signal strength is greater than a strength preset threshold;

And a regulator, configured to reduce a current signal bandwidth of the loop filter of the first communication terminal when the signal strength is greater than the intensity preset threshold.
The communication terminal according to claim 13, wherein the communication terminal further comprises:

a transmitter for transmitting signals to other communication terminals;

a determining module, configured to determine, according to the current signal bandwidth of a loop filter of the communication terminal, the communication terminal to use for the other communication when the communication terminal is to send a signal to the other communication terminal The signal bandwidth of the loop filter that the terminal sends the signal.
A communication terminal, comprising: a communication circuit, a memory, and a processor;

The communication circuit is configured to transmit a signal;

The memory is configured to store a computer program executed by the processor and intermediate data generated when the computer program is executed;

The method of controlling a loop filter bandwidth according to any one of claims 1 to 12 when the processor executes the computer program.