WO2018045845A1

WO2018045845A1 - Signal processing method and device, and mobile terminal

Info

Publication number: WO2018045845A1
Application number: PCT/CN2017/095281
Authority: WO
Inventors: 田晓光
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-09-12
Filing date: 2017-07-31
Publication date: 2018-03-15
Also published as: CN107817494A

Abstract

The present invention provides a signal processing method and device, and a mobile terminal. The method comprises: transmitting a detection signal to a detection target, wherein the detection signal is generated by a radar module provided in a mobile terminal; receiving a reflection signal generated by reflecting the detection signal by the detection target; and determining object information of the detection target according to the detection signal and the reflection signal. The present invention solves the problem in the related art that specific obstacles during driving cannot be detected by using the existing navigation method, and improves the driving safety.

Description

Signal processing method, device and mobile terminal

Technical field

The present invention relates to the field of communications, and in particular to a signal processing method and apparatus, and a mobile terminal.

Background technique

Most existing mobile terminals (for example, smart phones) have navigation functions based on Global Position System (GPS)/Beidou/Glonass. With the popularity of various navigation applications, mobile terminal navigation is driving on cars. The application is becoming more and more popular. However, this kind of navigation only points out the direction and speed of the car and the set driving route during the driving process of the car. It cannot be visited for specific obstacles on the road, for example, when the line of sight is not good (when the car enters the tunnel or exits the tunnel) In the case of sudden changes in light, or rain, snow, fog, backlighting, etc., obstacles and pedestrians on the road, drivers often do not respond urgently.

Therefore, there is a problem in the related art that the existing navigation method cannot detect a specific obstacle in driving.

Summary of the invention

The embodiment of the invention provides a signal processing method, a device and a mobile terminal, so as to at least solve the problem that the existing navigation method in the related art cannot detect a specific obstacle in driving.

According to an embodiment of the present invention, a signal processing method includes: transmitting a sounding signal to a detecting target, wherein the sounding signal is generated by a radar module built in a mobile terminal; and receiving the detecting target The reflected signal generated by the detection signal is reflected; and the object information of the detection target is determined according to the detection signal and the reflected signal.

Optionally, in the process of transmitting the detection signal to the detection target, including: detecting an internal temperature of the radar module; and sending an alarm signal to a processor of the mobile terminal when the internal temperature exceeds a predetermined threshold And controlling a power switch of the radar module according to an enable signal returned by the processor.

Optionally, determining, according to the detection signal and the reflected signal, the object information of the detection target includes: mixing the detection signal, and the reflected signal, determining the detection signal and the a frequency difference between the reflected signals; determining the object information of the detection target according to the determined frequency difference.

According to another embodiment of the present invention, there is provided a signal processing apparatus comprising: a transmitting module configured to transmit a sounding signal to a detecting target, wherein the sounding signal is generated by a radar module built in the mobile terminal; a module configured to receive a reflection signal generated by the detection target to reflect the detection signal; and a determining module configured to determine object information of the detection target according to the detection signal and the reflection signal.

Optionally, the device further includes: a detecting module configured to detect an internal temperature of the radar module; and a sending module configured to send an alarm to a processor of the mobile terminal when the internal temperature exceeds a predetermined threshold a signal control module configured to control a power switch of the radar module according to an enable signal returned by the processor.

Optionally, the determining module includes: a mixing unit configured to mix the detection signal and the reflected signal, determine a frequency difference between the detection signal and the reflected signal; and determine a unit, It is arranged to determine the object information of the detection target according to the determined frequency difference.

According to still another embodiment of the present invention, a mobile terminal is provided, including: a radar module configured to transmit a detection signal to a detection target; and receive a reflection signal generated by the detection target to reflect the detection signal; And connected to the radar module, configured to determine object information of the detection target according to the detection signal and the reflected signal.

Optionally, the radar module comprises: a local oscillator configured to generate the detection signal; or a phase locked loop circuit configured to generate the detection signal.

Optionally, the radar module further includes: a frequency divider, wherein the local oscillator is further configured to generate a first oscillation signal in a free oscillation state, and send the first oscillation signal to the minute And the frequency converter is further configured to generate the detection signal according to an oscillation control signal sent by the processor for controlling an oscillation frequency of the local oscillator; the frequency divider, and the local The oscillator is connected to be configured to divide the received first oscillating signal to generate a frequency-divided signal, and send the generated frequency-divided signal to the processor; the processor is further configured to receive Deriving the frequency-divided signal, and the clock signal of the processor, determining the oscillation control signal; and transmitting the oscillation control signal to the radar module.

Optionally, the processor includes: a local oscillator frequency establishing unit and a digital/analog D/A converter, wherein the local oscillator frequency establishing unit is configured to compare the received frequency dividing signal and frequency dividing processing a subsequent clock signal to determine an error signal; the D/A converter being coupled to the local oscillator frequency establishing unit, configured to perform a digital signal to analog signal conversion on the determined error signal to generate the And oscillating the control signal; and transmitting the generated oscillation control signal to the radar module.

Optionally, the radar module includes: a mixer, wherein the mixer is configured to mix the detection signal and the reflected signal to determine the detection signal and the reflected signal a frequency difference signal between the processors; the processor further configured to determine the object information of the detection target according to the determined frequency difference signal.

Optionally, the mobile terminal further includes: a filter and a signal amplifier, wherein the filter is connected to the mixer, and is configured to perform filtering processing on the frequency difference signal; the signal amplifier, and The filters are connected to be set to match a signal level between the radar module and the processor, and perform signal amplification processing on the frequency difference signal.

Optionally, the object information includes at least one of: a distance between the detection target and the mobile terminal, a direction of the detection target relative to the mobile terminal, a moving speed of the detection target, the detection The size of the object.

Optionally, the radar module includes: a temperature sensor and an enable pin, wherein the temperature sensor is configured to transmit an internal temperature parameter for identifying an internal temperature of the radar module to the processor; The enable pin is configured to control a power switch of the radar module according to the processor enable signal.

According to still another embodiment of the present invention, a storage medium is also provided. The storage medium is configured to store program code for performing the following steps: transmitting a sounding signal to the detection target, wherein The detection signal is generated by a radar module built in the mobile terminal; receiving a reflection signal generated by the detection target to reflect the detection signal; determining the detection target according to the detection signal and the reflected signal Object information.

Optionally, the storage medium is further configured to store program code for performing the following steps: in the process of transmitting the detection signal to the detection target, comprising: detecting an internal temperature of the radar module; When the threshold is predetermined, an alarm signal is sent to the processor of the mobile terminal; and the power switch of the radar module is controlled according to an enable signal returned by the processor.

Optionally, the storage medium is further configured to store program code for performing the following steps: determining, according to the detection signal and the reflected signal, the object information of the detection target comprises: the detection signal, and the The reflected signal is mixed to determine a frequency difference between the detected signal and the reflected signal; and the object information of the detecting target is determined according to the determined frequency difference.

According to the embodiment of the present invention, the radar module of the mobile terminal transmits a detection signal to the detection target, and determines the object information of the detection target according to the detected detection signal and the reflected signal generated by the received detection target to reflect the detection signal. Since the radar module is installed in the mobile terminal, it is possible to solve the problem that the existing navigation method cannot detect the specific obstacle in the related art, and the driving safety is improved.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a block diagram showing the hardware structure of a mobile terminal according to a signal processing method according to an embodiment of the present invention;

2 is a flow chart of a signal processing method according to an embodiment of the present invention;

3 is a block diagram 1 of a signal processing apparatus according to an embodiment of the present invention;

4 is a block diagram 2 of a signal processing apparatus according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a determining module 36 of a signal processing apparatus according to an embodiment of the present invention;

FIG. 6 is a structural block diagram of a mobile terminal according to an embodiment of the present invention; FIG.

7 is a structural block diagram 1 of a mobile phone according to a preferred embodiment of the present invention;

FIG. 8 is a structural block diagram 2 of a mobile phone according to a preferred embodiment of the present invention; FIG.

9 is a flow chart of a signal processing method in accordance with a preferred embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

Example 1

The method embodiment provided by Embodiment 1 of the present application can be executed in a mobile terminal, a computer terminal or the like. Taking a mobile terminal as an example, FIG. 1 is a block diagram showing the hardware structure of a mobile terminal according to a signal processing method according to an embodiment of the present invention. As shown in FIG. 1, the mobile terminal 1 may include one or more (only one shown) processor 12 (the processor 12 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA). A memory 14 configured to store data and a transmission device 16 configured as a communication function. It will be understood by those skilled in the art that the structure shown in FIG. 1 is merely illustrative and does not limit the structure of the above electronic device. For example, the mobile terminal 1 may also include more or less components than those shown in FIG. 1, or have a different configuration than that shown in FIG.

The memory 14 can be configured as a software program and a module for storing application software, such as program instructions/modules corresponding to the signal processing method in the embodiment of the present invention, and the processor 12 executes each by executing a software program and a module stored in the memory 14. A functional application and data processing, that is, the above method is implemented. Memory 14 may include high speed random access memory, and may also include non-volatile memory such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 14 can further include remotely located relative to processor 12 The memories are located, and the remote memories can be connected to the mobile terminal 1 through a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Transmission device 16 is arranged to receive or transmit data via a network. The above specific network example may include a wireless network provided by a communication provider of the mobile terminal 1. In one example, the transmission device 16 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 16 can be a Radio Frequency (RF) module configured to communicate with the Internet wirelessly.

In this embodiment, a signal processing method running on the mobile terminal is provided. FIG. 2 is a flowchart of a signal processing method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202, transmitting a detection signal to the detection target, wherein the detection signal is generated by a radar module built in the mobile terminal;

Step S204, receiving a reflection signal generated by the detection target to reflect the detection signal;

Step S206, determining object information of the detection target according to the detection signal and the reflection signal.

Through the above steps, the detection signal generated by the radar module built in the mobile terminal is transmitted to the detection target, and the object information of the detection target is determined according to the detected detection signal and the reflected signal generated by the received detection target reflecting the detection signal. The invention solves the problem that the existing navigation method cannot detect the specific obstacles in the related art, and improves the safety of driving.

Optionally, the object information includes at least one of: a distance between the detection target and the mobile terminal, a direction of the detection target relative to the mobile terminal, a moving speed of the detection target, and an object size of the detection target.

Optionally, before step S202, the method further includes: generating the detection signal by using an oscillator and a phase locked loop local to the radar module.

The detection signal is generated in different manners by using the above technical solution of the embodiment of the present invention. Increased flexibility in detection signal generation.

Alternatively, the detection signal can be generated by a local oscillator of the radar module in a variety of ways. For example, the detection signal may be generated according to a preset oscillation control signal, or the oscillation frequency of the local oscillator may be controlled according to a predetermined instruction to generate a detection signal. For another example, the first oscillating signal generated in the free oscillation state of the oscillator may be divided to generate a frequency-divided signal; and the generated frequency-divided signal and the clock signal of the processor of the mobile terminal (may also be set as a control oscillator) Comparing the clock signal of the preset device of the oscillation frequency to determine the error signal; determining an oscillation control signal set to control the oscillation frequency of the oscillator according to the determined error signal; controlling the oscillation frequency of the oscillator according to the determined oscillation control signal , generating a sounding signal.

According to the above technical solution of the embodiment of the present invention, the oscillation frequency of the oscillator is generated by generating an oscillation control signal for controlling the oscillation frequency of the oscillator by using the first oscillation signal in the free oscillation state of the oscillator and the clock signal of the processor of the mobile terminal. Control improves the simplicity of controlling the oscillation frequency of the oscillator.

Optionally, during the process of step S202, the internal temperature of the radar module can also be monitored. For example, detecting the internal temperature of the radar module, when the internal temperature exceeds a predetermined threshold, sending an alarm signal to the processor of the mobile terminal; and controlling the power switch of the radar module according to the enable signal returned by the processor.

Through the above technical solution of the embodiment of the present invention, by monitoring the internal temperature of the radar module during the operation of the radar module, the life of the radar module is shortened or burned due to overheating of the internal temperature.

Optionally, in step S206, the object information of the detection target may be determined in various manners. For example, the detection signal and the reflection signal may be separately analyzed, and the analysis result is compared to determine the object information of the detection target, and, for example, the detection may be performed. The signal and the reflected signal are mixed, the frequency difference between the detected signal and the reflected signal is determined, and the determined frequency difference is analyzed to determine the object information of the detected target.

According to the above technical solution of the embodiment of the present invention, the object signal of the detection target is determined according to the frequency difference between the detection signal and the reflected signal, and the rate of determining the object information of the detection target is improved.

Optionally, after step S206, a reminder message for alerting the object information may also be generated according to the determined object information. The reminder message may include multiple ways, for example, the object information may be presented by voice, or the object information of the detection target may be displayed through the display screen of the terminal, or the object information may be generated by combining the two methods.

Optionally, for an unmanned automobile or other vehicle, according to the determined object information of the detection target, combined with the current road condition, the corresponding evasive measures may be determined, for example, deceleration bypass, side-to-side parking, and the like.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

Example 2

In the embodiment, a signal processing device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

FIG. 3 is a structural block diagram 1 of a signal processing apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes:

The transmitting module 32 is configured to send a detection signal to the detection target, wherein the detection signal is generated by a radar module built in the mobile terminal;

The receiving module 34 is connected to the transmitting module 32, and is configured to receive a reflected signal generated by the detecting target to reflect the detecting signal;

The determining module 36 is connected to the receiving module 34, and is configured to determine object information of the detecting target according to the detecting signal and the reflected signal.

FIG. 4 is a block diagram showing the structure of a signal processing apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes, in addition to all the modules shown in FIG.

The detecting module 42 is configured to detect an internal temperature of the radar module;

The sending module 44 is connected to the detecting module 42 and configured to send an alarm signal to the processor of the mobile terminal when the internal temperature exceeds a predetermined threshold;

The control module 46 is connected to the transmitting module 44 and configured to control the power switch of the radar module according to an enable signal returned by the processor.

FIG. 5 is a structural block diagram of a determining module 36 of a signal processing apparatus according to an embodiment of the present invention. As shown in FIG. 5, the determining module 36 includes:

The mixing unit 52 is configured to mix the detection signal and the reflected signal to determine a frequency difference between the detection signal and the reflected signal;

The determining unit 54 is connected to the mixing unit 52, and is configured to determine object information of the detecting target according to the determined frequency difference.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

Example 3

A mobile terminal is also provided in this embodiment. FIG. 6 is a structural block diagram of a mobile terminal according to an embodiment of the present invention. As shown in FIG. 6, the mobile terminal includes:

The radar module 62 is configured to transmit a detection signal to the detection target, and receive a reflection signal generated by the detection target to reflect the detection signal;

The processor 64 is connected to the radar module 62 and configured to determine object information of the detection target according to the detection signal and the reflected signal.

Optionally, the radar module 62 may include: a local oscillator, configured to generate the probe The signal is measured; or, the phase locked loop circuit is configured to generate the detection signal.

Optionally, the radar module 62 may further include a frequency divider, wherein the local oscillator is further configured to generate a first oscillation signal in a free oscillation state, and send the first oscillation signal to the frequency divider, and further set Generating a detection signal according to an oscillation control signal sent by the processor 64 for controlling an oscillation frequency of the local oscillator; and a frequency divider configured to divide the received first oscillation signal to generate a frequency-divided signal, which is generated The divided signal is sent to the processor 64. The processor 64 is further configured to compare the received frequency-divided signal with the clock signal of the processor 64, determine an error signal, determine an oscillation control signal according to the determined error signal, and send the oscillation control signal to the radar module 62.

Optionally, the processor 64 may include: a local oscillator frequency establishing unit, and a digital-to-analog conversion (D/A conversion) device, wherein the local oscillator frequency establishing unit is configured to compare the received The frequency-divided signal and the frequency-divided clock signal determine the error signal; the D/A converter is connected to the local oscillator frequency establishing unit, and is configured to convert the digital signal to the analog signal for the determined error signal to generate an oscillation control The signal is sent to the radar module 62.

Optionally, the radar module 62 may include: a mixer configured to mix the detection signal and the reflected signal to determine a frequency difference signal between the detection signal and the reflected signal; the processor 64 may also be configured To determine the object information of the detection target based on the determined frequency difference signal.

Optionally, the mobile terminal may further include a filter and a signal amplifier, wherein the filter is connected to the mixer and configured to filter the frequency difference signal; the signal amplifier is connected to the filter and configured to match the radar. The signal level between the module 62 and the processor 64 performs signal amplification processing on the frequency difference signal.

Optionally, the object information may include at least one of: a distance between the detection target and the mobile terminal, a direction of the detection target relative to the mobile terminal, a moving speed of the detection target, and an object size of the detection target.

Optionally, the radar module 62 may further include: a temperature sensor and an enable pin, wherein the temperature sensor is configured to transmit an internal temperature parameter for identifying an internal temperature of the radar module to The processor 64; the enable pin is configured to control the power switch of the radar module 62 according to the enable signal of the processor 64. The enable signal may be generated by the processor 64 determining the performance of the radar module according to the received internal temperature parameter, or may be based on the received user control information (for example, obtaining the controller input through the display screen) Control information) generated.

Alternatively, processor 64 may be a baseband processor of the mobile terminal.

Optionally, the radar module 62 can also be integrated in a separate device, connected to the mobile terminal through an interface of the mobile terminal (for example, a USB interface, a headphone interface, etc.), and interacts with the processor of the mobile terminal through the interface. . In the above case, the integrated radar device may also be integrated with a separate processor, configured to control the transmitted detection signal and the received reflected signal, and process the detection signal and the reflected signal to be processed by the mobile terminal. The signal format that the device recognizes and processes.

Based on the foregoing embodiment and the optional implementation manners, in order to explain the interaction process of devices in the mobile terminal in the solution, in the preferred embodiment, a mobile terminal is provided. It should be noted that, in the preferred embodiment, the mobile terminal is described by taking a mobile phone as an example, and the processor is described by taking a baseband processor as an example.

The mobile phone includes a basic component such as a mobile phone case, a circuit board, a display screen, a battery, etc. The main functions of the preferred embodiment are concentrated on the circuit board. The circuit board of the mobile phone of the preferred embodiment includes a baseband processor (for example, baseband processing). ), memory, audio subsystem, power supply, transceiver, Wireless Fidelity (WiFi) module, and other common sensor modules. Designing a millimeter wave radar device on the periphery of the baseband processor, and receiving the output information of the radar module by using a digital-to-analog/Analog-Digital (DA/AD) function of the baseband processor; The signal processing function of the baseband processor is used to process the detection information provided by the millimeter wave radar module and provide it to the human machine interface. And use related interfaces such as Inter-Intwgrated Circuit (I2C), General Purpose Input Output (GPIO), Mobile Industry Processor Interface (MIPI), etc. The millimeter wave radar module provides state control. The millimeter wave radar module also includes two antennas, one for transmitting, one for Used to receive signals reflected by obstacles, the two antennas need to have some isolation.

The mobile phone also includes a human-machine interface for setting the opening and closing of the millimeter wave radar function, and interacting with the mobile phone user through the display screen, vibration, audio, etc., and the human-machine interface can be in the form of an APP application software. Installed on your phone.

The phone can be configured to use the wireless routing device, the steps are as follows:

The first step: the user must install the aforementioned APP before use, and open the millimeter wave radar module through the APP on the display screen.

Step 2: Align or scan the transmitting and receiving antenna of the millimeter wave radar module to the direction that needs to be detected. The millimeter wave radar module records the detected corresponding parameters and transmits them to the mobile phone user through the display screen, vibration and sound.

7 is a structural block diagram of a mobile phone according to a preferred embodiment of the present invention. As shown in FIG. 7, a millimeter wave radar module is added to a mobile phone, and the radar module is designed on a printed circuit board (PCB) motherboard. The transmitting antenna and the receiving antenna can be designed on the mobile phone case or on the PCB main board, depending on the actual situation.

The local oscillator signal in the radar module is divided into a local oscillator state return signal, input to the baseband processor, and compared with the clock signal in the preprocessed baseband processor, and the obtained error signal becomes a local oscillator state control signal. Input to the voltage control terminal of the local oscillator circuit in the radar module to control the oscillation frequency of the local oscillator.

The received signal is processed by the radar module and processed by the baseband processor for signal processing. The signal processed by the baseband processor contains object information detected by the millimeter wave radar, including distance, direction, speed and the like.

The state control signal shown in FIG. 7 includes the physical quantities of the radar module, the power switch, and the like, and is interacted by the baseband processor and the radar module.

8 is a structural block diagram 2 of a mobile phone according to a preferred embodiment of the present invention. As shown in FIG. 8, the mobile phone includes:

The millimeter wave radar module 802 is an integrated 24 GHz millimeter wave radar transceiver module.

Baseband processor 804: is a baseband processor chip in a mobile phone.

Signal amplifier 806 is a signal amplifier designed to match the signal levels of millimeter wave radar module 802 and baseband processor 804.

Filter 808 is a filter introduced to suppress external interference.

The function of each device inside the millimeter wave radar module 802 will be described below.

The enable pin 810, the enable pin of the millimeter wave radar module 802, and the power switch of the millimeter wave radar module 802 are controlled.

The internal temperature sensor 812 is an internal temperature sensor of the millimeter wave radar module 802, and transmits the temperature parameter of the radar module to the baseband processor 804.

The frequency divider 814 is a frequency divider module, and the frequency division number is MxN times.

The voltage controlled oscillator 816 is a Voltage-Controller Oscillator (VCO). Assuming that the radar operates at 24 GHz, the voltage-controlled oscillator 816 has a free-running frequency of 24-26 GHz after power-on.

The power amplifier 818 is a power amplifier, and the signal of the voltage controlled oscillator 816 is power amplified and output.

The low noise amplifier 820 is a low noise amplifier that amplifies the radar reflected wave received by the receiving antenna S016 with a low noise signal.

The down mixer 822 is a down mixer, and the local oscillation signal generated by the voltage controlled oscillator 816 and the received reflected wave signal are mixed to obtain a difference frequency of the two signals and output.

The transmitting antenna 830 is a transmitting antenna.

The receiving antenna 832 is a receiving antenna.

The respective devices in the baseband processor 804 will be described below.

An analog/digital converter 824 is provided to perform analog to digital conversion by processing the output signal of the radar receiver via signal amplifier 806, filter 808.

The local oscillator frequency establishing unit 828 is a local oscillator frequency establishing unit of the baseband processor 804.

The digital/analog converter 826 is configured to perform digital/analog conversion on the signal generated by the local oscillator frequency establishing unit 828, and the converted signal is output to the voltage controlled oscillator 816 in the millimeter wave radar module 802 to control the voltage controlled oscillator. The oscillation frequency of 816.

Next, the principle of the millimeter wave radar transmitter of the signal processing method of the preferred embodiment will be described.

After the baseband processor 804 sends an enable signal to the millimeter wave radar module millimeter wave radar module 802, the millimeter wave radar module 802 is turned on, and the voltage controlled oscillator 816 enters a free oscillation state, and the oscillator is designed to generate 24-26 GHz. The frequency of the oscillation, the frequency divider 814 divides the frequency by MxN times, and both M and N can be preset by the baseband processor. For example, when M is 16, and N is 65536, the total frequency division ratio is 1048576. The frequency obtained after the frequency is about 22.89 KHz - 24.80 KHz, and the frequency is input to an analog/digital converter 824. In the analog/digital converter 824, the clock of the baseband processor 804 is first divided to 23 kHz, and then two The frequency is compared to obtain an error signal, and the error signal is input to the digital/analog converter 826, and the digital to analog signal is converted, converted into a voltage analog quantity, and loaded into the voltage control end of the voltage controlled oscillator 816 to control The oscillation of the voltage controlled oscillator 816 converges to about 24 GHz. The voltage controlled oscillator 816, the frequency divider 814, the local oscillator frequency establishing unit 828, and the digital/analog converter 826 form a negative feedback system for frequency stabilization of the frequency of the radar output signal. The stabilized frequency is amplified by the power of the power amplifier 818, and then radiated to the radar detection direction through the transmitting antenna 830.

The principle of the millimeter wave radar receiver based on the mobile terminal will be described below in combination with the structure of the above mobile terminal.

The signal is received by the receiver receive antenna 832, enters the low noise amplifier 820, is downmixed by the down mixer 822 and the local oscillator frequency, filtered by the filter 808, and passed to the match amplifier 806 to be amplified to the analog/digital in the baseband processor. The converter 824 performs analog/digital conversion, and then the baseband processor 804 extracts the physical quantities such as the distance, speed, direction, and the like of the detection target, and then is referenced by the APP application software of the upper layer.

Based on the above principle, the signal processing procedure performed in the mobile terminal will be described below. 9 is a flow chart of a signal processing method in accordance with a preferred embodiment of the present invention, as shown in FIG. The process includes the following steps:

Step S902, the oscillating signal generated by the local oscillator of the millimeter wave radar module is amplified by the power amplifier, and then radiated to the radar detecting direction by the transmitting antenna.

Step S904, receiving, by the receiving antenna of the millimeter wave radar module, a reflected signal reflected by the detecting target.

Step S906, the received reflected signal and the oscillation signal of the local oscillator are down-mixed by the down mixer, filtered by the filter, and then amplified by the matching amplifier.

Step S908, the signal amplified by the matching amplifier is sent to the analog/digital converter of the baseband processor for analog/digital conversion.

In step S910, the baseband processor extracts physical quantities such as distance, speed, and direction of the detection target.

Through the above technical solution of the preferred embodiment of the present invention, the millimeter wave radar function is integrated on the mobile phone, and the navigation function of the mobile phone can be used to detect the sudden obstacles appearing in the traffic in real time, and the alarm is timely, and the driver is reserved enough. time. At the same time, you can also use the radar function of the mobile phone to detect the surrounding environment, blind navigation, monitoring and other functions that are difficult for people to enhance the user experience of the mobile phone.

Compared with the existing mobile phone, the mobile phone integrated with the millimeter wave radar function of the preferred embodiment has the following advantages:

1) After the millimeter wave radar module is integrated on the mobile phone, it can be assisted by radar detection when the mobile phone is used as a navigation device when driving the car, which can overcome, for example, a bad line of sight (a sudden change of light when the car enters the tunnel or exits the tunnel) In the case of rain, snow, fog, backlighting, etc., obstacles and pedestrians on the road, the driver may not respond.

2) Using a mobile phone integrated with a millimeter-wave radar module and the corresponding human-machine interface application, it is possible to detect the surrounding environment that is difficult for people, such as the surrounding geographical environment in the dark, underground metal objects, which cannot be achieved by humans. The distance, speed, direction, etc. of the target.

3) The mobile phone integrated with the millimeter wave radar module and the corresponding human-machine interface application can be used as a blind navigation device.

4) Using the mobile phone integrated with the millimeter wave radar module and the corresponding human-machine interface application, the mobile phone can be regarded as a temporary monitoring device to monitor the moving speed, direction and distance of the target object under certain conditions.

5) The use of mobile phones with integrated millimeter wave radar modules and corresponding human-machine interface applications can help mobile phone holders find lost metal objects.

Alternatively, the signal processing method of the preferred embodiment can also be applied to other types of mobile terminals, such as a tablet computer or the like.

Through the above technical solution of the preferred embodiment of the present invention, a millimeter wave radar function is integrated on a mobile terminal (eg, a mobile phone), and a navigation function of the mobile terminal can be combined to detect a sudden obstacle occurring in the driving in real time, and the alarm is promptly given to The driver reserves enough time to cope. At the same time, the radar function of the mobile terminal can also be used to detect the surrounding environment, blind navigation, monitoring, and the like that are difficult for people to improve the user experience of the mobile terminal.

Example 4

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1, transmitting a detection signal to the detection target, wherein the detection signal is generated by a radar module built in the mobile terminal;

S2, receiving a reflection signal generated by the detection target to reflect the detection signal;

S3. Determine the object information of the detection target according to the detection signal and the reflected signal.

Optionally, the storage medium is further arranged to store program code for performing the following steps:

Before transmitting the sounding signal to the detection target, it also includes:

A detection signal is generated by a local oscillator and/or a phase locked loop of the radar module.

The detection signals generated by the local oscillator of the radar module include:

S1, dividing a first oscillating signal generated in an oscillator free oscillation state to generate a frequency dividing signal;

S2, comparing the frequency-divided signal with a clock signal of a processor of the mobile terminal to determine an error signal;

S3, determining an oscillation control signal for controlling an oscillation frequency of the oscillator according to the error signal;

S4, according to the oscillation control signal, control the oscillation frequency of the oscillator to generate a detection signal.

In the process of transmitting a sounding signal to a detection target, including:

S1, detecting the internal temperature of the radar module;

S2. Send an alarm signal to a processor of the mobile terminal when the internal temperature exceeds a predetermined threshold.

S3, controlling the power switch of the radar module according to the enable signal returned by the processor.

According to the detection signal and the reflected signal, determining the object information of the detection target includes:

S1, mixing the detection signal and the reflected signal to determine a frequency difference between the detection signal and the reflected signal;

S2. Determine object information of the detection target according to the determined frequency difference.

After determining the object information of the detection target according to the detection signal and the reflected signal, the method further includes:

A reminder message for prompting the object information is generated based on the determined object information.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

Optionally, in this embodiment, the processor performs, according to the stored program code in the storage medium, the detection signal is sent to the detection target, wherein the detection signal is generated by a radar module built in the mobile terminal; and the detection target pair is received. a reflected signal generated by the reflection of the detection signal; The detection signal, as well as the reflected signal, determine the object information of the detection target.

Optionally, in this embodiment, the processor performs, according to the stored program code in the storage medium, before transmitting the detection signal to the detection target, further comprising: an oscillator and a phase locked loop local to the radar module. A detection signal is generated.

Optionally, in this embodiment, the processor executes, according to the stored program code in the storage medium: generating the detection signal by using an oscillator local to the radar module, including: generating a first oscillating signal generated by the oscillator in a free oscillation state. Performing frequency division to generate a frequency-divided signal; comparing the frequency-divided signal with a clock signal of a processor of the mobile terminal to determine an error signal; determining an oscillation control signal for controlling an oscillation frequency of the oscillator according to the error signal; The signal controls the oscillation frequency of the oscillator to generate a detection signal.

Optionally, in this embodiment, the processor performs, according to the stored program code in the storage medium, in the process of transmitting the detection signal to the detection target, including: detecting an internal temperature of the radar module; and the internal temperature exceeding a predetermined threshold The alarm signal is sent to the processor of the mobile terminal; and the power switch of the radar module is controlled according to the enable signal returned by the processor.

Optionally, in this embodiment, the processor performs, according to the stored program code in the storage medium, determining, according to the detection signal and the reflected signal, the object information of the detection target, comprising: mixing the detection signal and the reflected signal, Determining a frequency difference between the detected signal and the reflected signal; determining object information of the detected target according to the determined frequency difference.

Optionally, in this embodiment, the processor performs, according to the stored program code in the storage medium, after determining the object information of the detection target according to the detection signal and the reflected signal, the method further includes: generating, according to the determined object information, A reminder message for prompting object information.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device Execution, and in some cases, the steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of The integrated circuit module is implemented. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Claims

A mobile terminal includes:

a radar module configured to transmit a detection signal to the detection target; and receive a reflection signal generated by the detection target to reflect the detection signal;

The processor is connected to the radar module and configured to determine object information of the detection target according to the detection signal and the reflected signal.
The mobile terminal of claim 1, wherein the radar module comprises:

a local oscillator configured to generate the detection signal; or a phase locked loop circuit configured to generate the detection signal.
The mobile terminal of claim 2, wherein the radar module further comprises: a frequency divider, wherein

The local oscillator is further configured to generate a first oscillating signal in a free-oscillation state, to send the first oscillating signal to the frequency divider, and further configured to be used according to the processor for controlling the An oscillation control signal of an oscillation frequency of the local oscillator generates the detection signal;

The frequency divider is connected to the local oscillator, and configured to divide the received first oscillating signal to generate a frequency-divided signal, and send the generated frequency-divided signal to the processor;

The processor is further configured to determine the oscillation control signal according to the received frequency-divided signal and a clock signal of the processor; and send the oscillation control signal to the radar module.
The mobile terminal of claim 3, wherein the processor comprises: a local oscillator frequency establishing unit, a digital/analog D/A converter, wherein

The local oscillator frequency establishing unit is configured to compare the received frequency-divided signal and the frequency-divided clock signal to determine an error signal;

The D/A converter is connected to the local oscillator frequency establishing unit, and configured to perform a digital signal to analog signal conversion on the determined error signal to generate the oscillation control signal; The generated oscillation control signal is sent to the radar module.
The mobile terminal according to claim 1, wherein the radar module comprises: a mixer, wherein the mixer is configured to mix the detection signal and the reflected signal to determine a frequency difference signal between the detection signal and the reflected signal;

The processor is further configured to determine the object information of the detection target according to the determined frequency difference signal.
A mobile terminal according to claim 5, further comprising: a filter and a signal amplifier, wherein

The filter is connected to the mixer and configured to perform filtering processing on the frequency difference signal;

The signal amplifier is connected to the filter and configured to match a signal level between the radar module and the processor, and perform signal amplification processing on the frequency difference signal.
The mobile terminal of claim 1, wherein the object information comprises at least one of: a distance of the probe target from the mobile terminal, a direction of the probe target with respect to the mobile terminal, the probe The moving speed of the target, the size of the object of the detecting target.
The mobile terminal according to any one of claims 1 to 7, wherein the radar module comprises: a temperature sensor and an enable pin, wherein

The temperature sensor is configured to transmit an internal temperature parameter for identifying an internal temperature of the radar module to the processor;

The enable pin is configured to control a power switch of the radar module according to an enable signal of the processor.
A signal processing method includes:

Transmitting a detection signal to the detection target, wherein the detection signal is generated by a radar module built in the mobile terminal;

Receiving a reflection signal generated by the detection target to reflect the detection signal;

And determining object information of the detection target according to the detection signal and the reflection signal.
The method of claim 9, wherein in the transmitting the detection signal to the detection target, the method comprises:

Detecting an internal temperature of the radar module;

Sending an alarm signal to a processor of the mobile terminal when the internal temperature exceeds a predetermined threshold;

Controlling a power switch of the radar module according to an enable signal returned by the processor.
The method according to claim 9 or 10, wherein determining the object information of the detection target according to the detection signal and the reflection signal comprises:

Mixing the detection signal and the reflected signal to determine a frequency difference between the detection signal and the reflected signal;

The object information of the detection target is determined according to the determined frequency difference.
A signal processing device comprising:

a transmitting module, configured to transmit a detection signal to the detection target, wherein the detection signal is generated by a radar module built in the mobile terminal;

a receiving module, configured to receive a reflection signal generated by the detection target to reflect the detection signal;

And a determining module configured to determine object information of the detection target according to the detection signal and the reflected signal.
The apparatus of claim 12, further comprising:

a detecting module configured to detect an internal temperature of the radar module;

a sending module, configured to send an alarm signal to a processor of the mobile terminal when the internal temperature exceeds a predetermined threshold;

The control module is configured to control a power switch of the radar module according to an enable signal returned by the processor.
The apparatus of claim 12 or 13, wherein the determining module comprises:

a mixing unit configured to mix the detection signal and the reflected signal to determine a frequency difference between the detection signal and the reflected signal;

a determining unit configured to determine the object information of the detection target according to the determined frequency difference.