WO2016145824A1

WO2016145824A1 - Signal processing circuit, method and user equipment

Info

Publication number: WO2016145824A1
Application number: PCT/CN2015/091115
Authority: WO
Inventors: 秦宇
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-08
Filing date: 2015-09-29
Publication date: 2016-09-22
Also published as: CN106506790A; CN106506790B

Abstract

A signal processing circuit, method and user equipment (UE). The signal processing circuit comprises a first antenna (22), a radio frequency processing module (24) and a first directional coupling circuit (26). In the signal processing circuit, the first directional coupling circuit (26) is series-connected to a common path between the first antenna (22) and the radio frequency processing module (24). The radio frequency processing module (24) is electrically connected to the first directional coupling circuit (26). The signal processing circuit addresses the problem in the related art in which a mobile phone structure only supports electromagnetic radiation intensity detection in a current working frequency and cannot perform electromagnetic radiation intensity detection in a plurality of working frequencies, thus enabling a mobile phone to support electromagnetic radiation intensity detection in a plurality of working frequencies.

Description

Signal processing circuit, method and user equipment

Technical field

The present invention relates to the field of communications, and in particular to a signal processing circuit, method and user equipment.

Background technique

With the development of wireless technology and communication, the increase of electromagnetic radiation in human environment and the possible impact on the human body are receiving more and more attention in today's society. Dedicated radiation detection equipment is not readily available to the general public. Groups’ suspicions about radiation in certain environments do not provide timely and real-time information.

1 is a structural block diagram of a mobile phone circuit according to the related art. As shown in FIG. 1, the mobile phone circuit is mainly composed of a baseband processing module, a radio frequency processing module, and a mobile communication antenna and a wireless communication antenna. In the related art, the radio frequency processing module performs filtering, power conversion, and the like on the received signal received by the antenna, and obtains a received signal of the current working frequency band, and sends the received signal of the current working frequency band to the baseband processing module for processing. Therefore, if the baseband processing module detects the radiation according to the received signal sent by the radio frequency processing module, only the radiation condition of the current working frequency band can be detected, and the radiation conditions of other frequency bands supported by the mobile phone except the current working frequency band cannot be detected. It can be seen that the radiation structure of multiple frequency bands supported by the mobile phone cannot be detected by using the mobile phone structure in the related technology. However, with the development of mobile communication technologies, in the mobile communication frequency band (for example, the Global System for Mobile Communication (GSM) band, the Long Term Evolution (LTE) band, etc.) or wireless Devices operating in the communication band (Wireless Fidelity (WIFI) band) will be more and more concentrated, and users need to know the radiation intensity of these devices in these bands in some cases. (equivalent to signal strength).

For the mobile phone structure in the related art, only the detection of the radiation intensity of the current working frequency band is supported, and the problem of the radiation intensity detection of multiple frequency bands cannot be performed, and an effective solution has not been proposed yet.

Summary of the invention

The present invention provides a signal processing circuit, method and user equipment to solve at least the problem that the mobile phone structure in the related art only supports the detection of the radiation intensity of the current working frequency band, and cannot perform the radiation intensity detection of multiple frequency bands.

According to an aspect of the embodiments of the present invention, a signal processing circuit includes a first antenna, a radio frequency processing module, and a first directional coupling circuit, the first directional coupling circuit being serially connected to the first The radio frequency processing module is electrically connected to the first directional coupling circuit on a common path between an antenna and the radio frequency processing module, wherein the first directional coupling circuit is configured to separate the first a first received signal and a first transmitted signal on a day line; the radio frequency processing module is configured to perform a down-conversion process on the first received signal and the first transmit signal, respectively, to obtain a plurality of signals to be detected, and And sending the plurality of to-be-detected signals to the baseband processing module, where the baseband processing module detects signal strengths of the plurality of to-be-detected signals.

Optionally, the signal processing circuit further includes: a second antenna and a second directional coupling circuit, the second directional coupling a circuit connected in series between the second antenna and the radio frequency processing module, wherein the second directional coupling circuit is configured to separate the second received signal and the second on the second antenna transmit a signal.

Optionally, the signal processing circuit further includes: a combining circuit, wherein the plurality of input ends of the combining circuit are respectively electrically connected to the plurality of output ends of the first directional coupling circuit and/or the second directional coupling circuit Connecting, the output end of the combining circuit is electrically connected to an input end of the radio frequency processing module, wherein the combining circuit is configured to combine a plurality of signals received from the plurality of input terminals into a coupling And transmitting the coupled signal to the radio frequency processing module, wherein the plurality of signals comprise at least two of: the first received signal, the first transmitted signal, the second received signal, and the second Transmitting a signal; the radio frequency processing module is configured to identify the plurality of signals from the coupled signals, perform down-conversion processing on the plurality of signals, obtain a plurality of signals to be detected, and The signal to be detected is sent to the baseband processing module.

Optionally, the combining circuit is configured to combine the plurality of signals received from the plurality of inputs into the coupled signal by means of time-division round sampling, or may input the multiple inputs The plurality of signals received by the terminal are combined into the coupled signal by means of waveform superposition.

Optionally, the combining circuit comprises: a single-pole multi-throw switching circuit.

Optionally, the first directional coupling circuit comprises: a dual directional coupler, or two single-sided directional couplers; and in the case where the signal processing circuit includes a second directional coupling circuit, the second The directional coupling circuit includes: a dual directional coupler, or two single-sided directional couplers.

Optionally, in a case where the first directional coupling circuit is a dual directional coupler, a first forward output end of the dual directional coupler is configured to output the separated first received signal, a first inverted output of the dual directional coupler is configured to output the separated first transmit signal; or the signal processing circuit includes a second directional coupling circuit, and the second directional coupled circuit is bidirectionally coupled The second forward output of the dual directional coupler is configured to output the separated second received signal, and the second inverted output of the dual directional coupler is configured to output the separated output The second transmit signal.

Optionally, in a case where the first directional coupling circuit is two single-sided directional couplers, an output of the first one-sided directional coupler in the first directional coupling circuit is configured to be output separated The first received signal, the output of the second one-sided directional coupler in the first directional coupling circuit is configured to output the separated first transmit signal; or the signal processing circuit includes In the case of two directional coupling circuits, and the second directional coupling circuit is two single-sided directional couplers, the output of the third one-sided directional coupler in the second directional coupling circuit is set to be separated from the output The second receiving signal, the output of the fourth one-sided directional coupler in the second directional coupling circuit is configured to output the separated second transmit signal.

Optionally, the frequency band in which the first received signal, the first transmit signal, the second received signal, and the second transmit signal are located is one or more frequency bands dedicated to mobile communication, and/or one or more Unlicensed band.

Optionally, the one or more mobile communication dedicated frequency bands include at least one of the following: a Global System for Mobile Communications (GSM) frequency band, a Code Division Multiple Access (CDMA) frequency band, and time division. a Time Division-Synchronous CDMA (TD-SCDMA) frequency band, a Wideband CDMA (WCDMA) frequency band, and a Long Term Evolution (LTE) frequency band; Unlicensed bands include: Wireless Fidelity Network (WIFI) band.

According to another aspect of an embodiment of the present invention, there is also provided a user equipment comprising the signal processing circuit described above.

According to another aspect of an embodiment of the present invention, a signal processing method is further provided, comprising: separating a received signal on the antenna by a directional coupling circuit connected in series on a common path between the antenna and the radio frequency processing module; Transmitting a signal; respectively performing down-conversion processing on the received signal and the transmitting signal to obtain a plurality of signals to be detected, and transmitting the plurality of signals to be detected to a baseband processing module, where the baseband processing module detects The signal strength of a plurality of signals to be detected.

Optionally, after the baseband processing module detects signal strengths of the multiple to-be-detected signals, the method further includes at least one of the following:

Obtaining a signal strength of the received signal and a signal strength of the transmitted signal, and respectively displaying a signal strength of the received signal and a signal strength of the transmitted signal; or superimposing signal strengths of the plurality of to-be-detected signals to obtain a first signal strength, and displaying the first signal strength; or acquiring position information corresponding to the signal strengths of the plurality of signals to be detected, and displaying a relationship between a signal strength of the plurality of signals to be detected and the position information Or sending the signal strengths of the plurality of signals to be detected to the server.

Optionally, after the baseband processing module detects the signal strengths of the multiple to-be-detected signals, the method further includes: determining whether a signal strength of the multiple to-be-detected signals is within a preset threshold; If the signal strength of the plurality of to-be-detected signals is within the preset threshold, the security level corresponding to the preset threshold is displayed.

According to the embodiment of the present invention, a signal processing circuit including a first antenna, a radio frequency processing module, and a first directional coupling circuit is adopted, in which the first directional coupling circuit is serially connected between the first antenna and the radio frequency processing module. The radio frequency processing module is electrically connected to the first directional coupling circuit, wherein the first directional coupling circuit is configured to separate the first receiving signal and the first transmitting signal on the first antenna; the radio frequency processing module, The method is configured to perform a down-conversion process on the first received signal and the first transmit signal, respectively, to obtain a plurality of to-be-detected signals, and send the plurality of to-be-detected signals to the baseband processing module, so that the baseband processing module detects the plurality of signals to be detected. The signal strength solves the problem that the mobile phone structure in the related art only supports the detection of the radiation intensity of the current working frequency band, and cannot detect the radiation intensity of multiple frequency bands, and realizes the detection of the radiation intensity of multiple frequency bands supported by the mobile phone.

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 structure of a mobile phone circuit according to the related art;

2 is a block diagram showing the structure of a signal processing circuit according to an embodiment of the present invention;

3 is a block diagram showing an optional structure of a signal processing circuit according to an embodiment of the present invention;

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

FIG. 5 is a structural block diagram of a mobile phone circuit according to an alternative embodiment of the present invention; FIG.

6 is a block diagram 1 of an optional structure of a mobile phone circuit according to an alternative embodiment of the present invention;

7 is a block diagram 2 of an alternative structure of a handset circuit in accordance with an alternative 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.

In the present embodiment, a signal processing circuit is provided. It should be noted that, as used hereinafter, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a signal processing circuit according to an embodiment of the present invention. As shown in FIG. 2, the circuit includes: a first antenna 22, a radio frequency processing module 24, a first directional coupling circuit 26, and a first directional coupling circuit. 26 is connected in series on the common path between the first antenna 22 and the RF processing module 24, and the RF processing module 24 is electrically connected to the first directional coupling circuit 26, wherein: the first directional coupling circuit 26 is configured to be separated a first receiving signal and a first transmitting signal on an antenna 22; the radio frequency processing module 24 is configured to perform a down-conversion process on the first received signal and the first transmit signal, respectively, to obtain a plurality of signals to be detected, and to The detection signal is sent to the baseband processing module for the baseband processing module to detect the signal strength of the plurality of signals to be detected.

Through the above circuit, the received signal and the transmitted signal on the first antenna are separated by the first directional coupling circuit, and the separated signal is directly sent to the RF processing module, and the received signal and the transmitted signal are performed in the RF processing module. After down-conversion processing, it is directly sent to the baseband processing module for processing, so that the baseband processing module can directly detect the signal strength of the received signal and the transmitted signal on the common path. The signal on the public path is the signal of all communication frequency bands that the mobile phone can support. Therefore, the signal strength of the received signal of all frequency bands and the transmitted signal of all frequency bands on the first antenna can be detected through the above steps, and the related art is solved. The mobile phone structure only supports the detection of the radiation intensity of the current working frequency band, and cannot detect the radiation intensity of multiple frequency bands, and realizes the detection of the radiation intensity of multiple frequency bands supported by the mobile phone.

Optionally, the foregoing circuit may be applied to a user equipment, where the user equipment includes, but is not limited to, a mobile terminal device such as a mobile phone, where the user equipment can support transmission and reception of communication signals in multiple frequency bands, and the frequency bands include a dedicated frequency band for mobile communication and/or Common frequency bands (eg unlicensed bands).

Optionally, the above common path refers to a path that is located on the antenna or between the antenna and the RF processing module, and can transmit signals and receive signals. For example, the path between the duplexer and the antenna, or, located at the antenna switch The path between the antennas.

The signal processing circuit described above may include a plurality of antennas, wherein the directional coupling circuits are respectively connected in series on the common path between each antenna and the RF processing module 24, thereby realizing acquisition of the transmitted signal and the received signal on each antenna. In the embodiment of the present invention, two antennas will be described and illustrated as an example.

3 is a block diagram showing an optional structure of a signal processing circuit according to an embodiment of the present invention. As shown in FIG. 3, optionally, the signal processing circuit further includes: a second antenna 32 and a second directional coupling circuit 34, and a second orientation. The coupling circuit 34 is connected in series on a common path between the second antenna 32 and the radio frequency processing module 24, wherein the second directional coupling circuit 34 is arranged to separate the second receiving signal and the second transmitting signal on the second antenna 32. .

In the above embodiment, the antenna is separated by a directional coupling circuit (including a received signal and a transmitted signal), and the multiplexed signal can be separately sent to the RF processing module for processing through multiple ports. Considering that the port of the RF processing module is limited, and in the presence of multiple antennas, the directional coupling circuit may separate a lot of road signals, resulting in insufficient use of the RF processing module port. In order to solve this problem, in some embodiments of the present invention, the separated multi-path signals can be combined into one or several signals through the combining circuit, thereby saving the ports of the radio frequency processing module.

For example, the signal processing circuit may further include: a combining circuit, wherein the plurality of input ends of the combining circuit are respectively electrically connected to the plurality of output ends of the first directional coupling circuit and/or the second directional coupling circuit, and the combining circuit The output end is electrically connected to the input end of the RF processing module, wherein the combining circuit is configured to combine the plurality of signals received from the plurality of input ends into a coupled signal, and send the coupled signal to the RF processing module, where The plurality of signals comprise at least two of: a first received signal, a first transmitted signal, a second received signal, and a second transmitted signal; and a radio frequency processing module configured to identify a plurality of signals from the coupled signal, and to separately signal the plurality of signals The down conversion process is performed to obtain a plurality of signals to be detected, and the plurality of signals to be detected are sent to the baseband processing module. By adding the above-mentioned combining circuit, a plurality of input signals are coupled and processed, and then the obtained coupling signal is sent to the RF processing module, which solves the problem of resource shortage at the input end of the RF processing module, and saves the input resource of the RF processing module. .

Optionally, the combining circuit can be implemented in various manners, for example, a plurality of signals received from a plurality of inputs are combined into a coupled signal by means of time-division round sampling, or may be received from a plurality of inputs. The plurality of signals are combined into a coupled signal by means of waveform superposition. Among them, the simple implementation of a combined circuit is to use a single-pole multi-throw switch circuit to combine multiple signals in a time-division manner. Correspondingly, after the combining circuit combines the plurality of signals, in the RF processing module, the coupled signal can be restored to the multi-channel signal according to the combining logic of the combining circuit.

The above directional coupling circuit can also be implemented in various ways. For example, a dual directional coupler or a single-sided directional coupler can be used. For example, the first directional coupling circuit 26 described above includes: a dual directional coupler, or two single-sided directional couplers; and in the case where the signal processing circuit includes the second directional coupling circuit 34, the second directional coupling circuit 34 includes : A dual directional coupler, or two single-sided directional couplers.

Optionally, in the case where the first directional coupling circuit 26 is a dual directional coupler, the first forward (ie, antenna to RF processing module direction) output of the dual directional coupler is configured to output the separated first reception. a signal, a first reverse (ie, RF processing module to antenna direction) output of the dual directional coupler is configured to output the separated first transmit signal; or the signal processing circuit includes a second directional coupling 34 circuit, and the second orientation In the case where the coupling circuit 34 is a dual directional coupler, The second forward output of the directional coupler is arranged to output a separate second received signal, and the second inverted output of the dual directional coupler is arranged to output a separate second transmit signal.

Optionally, in the case that the first directional coupling circuit 26 is two single-sided directional couplers, the output of the first one-sided directional coupler in the first directional coupling circuit is set to output the first separated Receiving a signal, an output of the second one-sided directional coupler in the first directional coupling circuit is configured to output the separated first transmit signal; or the signal processing circuit includes a second directional coupling circuit 34, and the second directional coupling In the case where the circuit 34 is two single-sided directional couplers, the output of the third one-sided directional coupler in the second directional coupling circuit is arranged to output the separated second received signal, and the second directional coupled circuit The output of the four single-sided directional coupler is arranged to output a separate second transmit signal.

Optionally, the frequency bands in which the first received signal, the first transmitted signal, the second received signal, and the second transmitted signal are located are one or more frequency bands dedicated to mobile communication, and/or one or more unlicensed frequency bands.

Optionally, the one or more mobile communication dedicated frequency bands include, but are not limited to, at least one of the following: a GSM frequency band, a CDMA frequency band, a TD-SCDMA frequency band, a WCDMA frequency band, and an LTE frequency band; and the foregoing unlicensed frequency bands include but are not limited to: a WIFI frequency band. .

A user equipment, including the signal processing circuit described above, is also provided in this embodiment.

A signal processing method is also provided in this embodiment. FIG. 4 is a flowchart of a signal processing method according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following steps:

Step S402, separating the received signal and the transmitted signal on the antenna by a directional coupling circuit connected in series on the common path between the antenna and the radio frequency processing module;

Step S404, respectively performing down-conversion processing on the received signal and the transmitted signal to obtain a plurality of signals to be detected, and sending the plurality of signals to be detected to the baseband processing module, so that the baseband processing module detects the signal strength of the plurality of signals to be detected.

Through the above steps, the directional coupling circuit is used to separate the received signal and the transmitted signal on the antenna, and then the received signal and the transmitted signal on the antenna are directly down-converted to detect the signal strength of the down-converted signal, which can be obtained. The signal strength of all transmitted signals and all received signals on the antenna. It can be seen that the above steps solve the problem that the mobile phone structure in the related art only supports the detection of the radiation intensity of the current working frequency band, and cannot perform the radiation intensity detection of multiple frequency bands, and realizes the radiation intensity of multiple frequency bands supported by the mobile phone. Detection.

Optionally, after the foregoing step S404, the signal strength of the received signal and the signal strength of the transmitted signal may be acquired, and the signal strength of the received signal and the signal strength of the transmitted signal are respectively displayed; or by superimposing a plurality of to-be-detected The signal strength of the signal, the first signal strength is obtained, and the first signal strength is displayed; or the signal strength and the position information of the plurality of signals to be detected are displayed by acquiring position information corresponding to the signal strengths of the plurality of signals to be detected. The way of the relationship; or the analysis of the radiation intensity by sending the signal strengths of the signals to be detected to the server.

Optionally, after the step S404, determining whether the signal strengths of the plurality of to-be-detected signals are within a preset threshold; and determining that the signal strengths of the plurality of to-be-detected signals are within a preset threshold, displaying the pre- Set the security corresponding to the threshold The level, for example, setting the preset threshold 1 to the preset threshold 9 indicates that the radiation intensity is from low to high, and the preset threshold 1 to the preset threshold 9 respectively correspond to the security level 1 to the security level 9, when it is determined that the signal strength 1 is in advance In the case where the threshold value 9 is set, the security level of the display signal strength 1 is the security level 9, indicating that the current radiation intensity is high. By the above method, the intensity of the radiation can be indicated by displaying the security level.

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.

Embodiments of the present invention also provide a software for performing the technical solutions described in the foregoing embodiments and optional embodiments.

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

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

In order to make the description of the embodiments of the present invention more clear, the following description and description are made in conjunction with the exemplary embodiments.

The optional embodiment of the present invention increases the mobile phone's ability to collect and detect spatial mobile communication and wireless communication frequency band signals by slightly modifying the mobile phone circuit and utilizing the existing mobile phone circuit. At the same time, combined with the calculation of radiation intensity and radiation time, the radiation intensity of the mobile communication and wireless communication frequency bands in the environment where the mobile phone user is located is obtained, and the mobile phone user is provided with the influence of radiation and the guidance for subsequent use.

The radiation frequency detected by the optional embodiment of the present invention is a frequency band of mobile communication and wireless communication supported by the mobile phone itself. For example: GSM band, CDMA band, TD-SCDMA band, WCDMA band, LTE band and WIFI band. With the development of the communication industry, these bands are the most common radiation bands in the human living environment. Although the specifications for various types of communications limit the various types of radiated power caps for various types of devices and handheld terminals. However, in the case of an increasing number of network layouts and users, the number of base stations and mobile phones is quite large, and it cannot be ignored that in some places, in some cases, the overall radiation of all wireless devices exceeds the standard. If the mobile phone itself has the ability to detect and estimate the overall radiation of these bands, and make some guiding suggestions for the user's use, it will be a very valuable supplement to mobile communication and wireless communication applications.

The transmission signal of the mobile phone is composed of the uplink signal power of the mobile communication and the transmission power of the wireless communication. The transmission signal of the mobile phone generates a certain amount of radiation to the user and the surrounding environment, and the Specific Absorption Ratio (SAR) is applied to the mobile phone. The radiation dose imposes certain restrictions, but in the case where multiple adjacent mobile phones are working at the same time, the total radiation dose may exceed the standard range, and the person using the mobile phone or the person not using the mobile phone is outside the safety threshold. Therefore, it is necessary to detect the total radiant energy of the transmitted signal.

The receiving signal of the mobile phone is composed of the downlink signal power of the mobile communication and the received signal of the wireless communication. Generally, the received signal strength is relatively small relative to the transmitted signal strength, but in some special places, such as being close to the mobile communication base station, or wireless In areas where communication hotspots are dense, the overall radiation dose is also possible beyond the standard range. Therefore, it is necessary to detect the total radiant energy of the received signal.

The mobile phone circuit generally has a detection function for its own transmit power, and its function is to adjust the gain of the transmit amplifier. There is a certain difference in the detection of the total emission energy compared to the above. At the same time, the receiving circuit of the mobile phone generally has the detection of the received signal strength, but the detected received signal strength is a processed signal, and the signal strength after filtering the unwanted signal, that is, the signal strength of the channel where the mobile phone is camped, the strength cannot be Reflecting the true radiation intensity in the environment, there are differences in the detection of the total received energy. Therefore, in order to realize the detection of the energy of the transceiving signal, the directional coupler is connected in series on the common circuit of the radio frequency front end of the mobile phone, and the transmitting power of the local device transmitted to the antenna and all the power received by the antenna, including the received signal, can be coupled at the same time. And the transmitted signal of the adjacent RF device. Each coupled signal is sent to the RF processor. The RF processor downconverts the coupled signal to baseband within the frequency range supported by the unit and transmits the processing result to the baseband processor. The coupled signal strength is analyzed, the baseband processor detects and analyzes the intensity of the processed signal, and the analysis result is reported to the upper application for synthesis, and finally the overall radiation intensity in the current environment is displayed on the screen of the mobile phone, and the hierarchical display is performed to Prompt the user.

It should be noted that the radiation intensity that the mobile phone can detect is the radiation intensity of the frequency band supported by the mobile phone, not all the wireless frequencies. Through the above circuit, the existing RF circuit of the mobile phone can be used to easily detect the radiation intensity on the mobile phone, and no additional circuits such as local oscillator, frequency conversion, and filtering are needed. At the same time, the detected frequency band is the radiation frequency band that people are exposed to in daily life, and it has strong practicability.

5 is a structural block diagram of a mobile phone circuit according to an alternative embodiment of the present invention. As shown in FIG. 5, a mobile directional antenna and a wireless communication antenna are connected in series to a common path of a radio frequency processing module, and a dual directional coupler, a communication antenna, is connected. The RF processing module does not need to expand its band support range without replacement or adjustment. The signal received and transmitted by the communication antenna is coupled to the four-way coupled signal by a dual directional coupler. The four-way coupled signal is connected to a single-pole four-throw (Single Pole 4Throw, SP4T for short) switch, and a signal is synthesized by time division. Send to the RF processing module;

The RF processing module identifies each of the coupled signals according to the switch control logic, and after being subjected to down-conversion processing and limiting amplification of each frequency band, is sent to the baseband processing module;

The baseband processing module performs detection analysis on the signal after the down-conversion processing, and obtains the conclusion of the signal strength of each frequency band, and reports it to the upper layer software for synthesis.

The combined results can be displayed on the screen of the mobile phone to alert the user to the current environment. E.g:

1. Display the overall radiation intensity in a hierarchical manner (including the radiation intensity caused by the emission of the machine (equivalent to the above-mentioned emission signal) and the radiation intensity generated by other devices and mobile phones in the received environment (equivalent to the above received signals)) And whether the radiation intensity is safe.

2. Display the radiation intensity caused by the emission of the machine and the radiation intensity generated by other devices and mobile phones in the environment, and whether the radiation intensity is safe.

3. According to the detection result in a period of time, combined with the user position change information, the change of the radiation intensity on the position change trajectory is displayed in the form of a map, and the user is provided with a reference.

4. Report the detection result and location of each mobile phone to the network server. After the server big data analysis, it can feedback the real-time radiation distribution map of the mobile phone, and analyze the area with large radiation intensity in depth. Excessive use of mobile phones is also caused by mobile communication base stations or wireless communication hotspots. The former can use the feedback of this information to promote the use of the mobile phone in the crowd or the crowd tends to spread. The latter can encourage mobile operators or wireless hotspot owners to adjust the radiation intensity of the device.

6 is a block diagram of an alternative structure of a handset circuit in accordance with an alternative embodiment of the present invention. As shown in FIG. 6, alternatively, the dual directional coupler may be replaced with two or a single-sided directional coupler.

FIG. 7 is a block diagram 2 of an optional structure of a mobile phone circuit according to an alternative embodiment of the present invention. As shown in FIG. 7, optionally, the SP4T switch may be replaced by a combiner or other device having combined performance.

Alternatively, the variety can be evolved based on a radiation distribution map. For example: radiation maps with different precision, local radiation distribution maps, indoor radiation distribution maps, radiation distribution maps of different floors, etc.

In summary, by making minor modifications to the existing mobile phone hardware and software, the mobile phone can have certain radiation detection capabilities. High achievability and practicality. The big data statistics after the radiation data acquisition can form a more practical radiation distribution map. It has a positive effect on human health and social development.

Industrial Applicability: As can be seen from the above description, the present invention utilizes a directional coupling circuit to separate the received signal and the transmitted signal on the antenna, and then directly down-converts the received signal and the transmitted signal on the antenna to detect the down-converted signal. The signal strength can be obtained from the signal strength of all transmitted signals and all received signals on the antenna. It can be seen that the above steps solve the problem that the mobile phone structure in the related art only supports the detection of the radiation intensity of the current working frequency band, and cannot perform the radiation intensity detection of multiple frequency bands, and realizes the radiation intensity of multiple frequency bands supported by the mobile phone. Detection.

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 such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only an optional embodiment of the present invention, and is not intended to limit the present invention, and is for those skilled in the art. Many variations and modifications of the invention are possible. 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.

Claims

A signal processing circuit includes a first antenna, a radio frequency processing module, and a first directional coupling circuit, the first directional coupling circuit being serially connected between the first antenna and the radio frequency processing module The radio frequency processing module is electrically connected to the first directional coupling circuit, wherein

The first directional coupling circuit is configured to separate the first received signal and the first transmit signal on the first antenna;

The radio frequency processing module is configured to perform a down conversion process on the first received signal and the first transmit signal, respectively, to obtain a plurality of to-be-detected signals, and send the multiple to-be-detected signals to the baseband processing module, And the baseband processing module is configured to detect signal strengths of the plurality of signals to be detected.
The signal processing circuit according to claim 1, wherein said signal processing circuit further comprises: a second antenna and a second directional coupling circuit, said second directional coupling circuit being serially connected to said second antenna and said radio frequency Processing the common path between modules, where

The second directional coupling circuit is configured to separate the second received signal and the second transmitted signal on the second antenna.
The signal processing circuit according to claim 1 or 2, wherein the signal processing circuit further comprises: a combining circuit, the plurality of inputs of the combining circuit and the first directional coupling circuit and/or a plurality of output ends of the second directional coupling circuit are electrically connected, and an output end of the combining circuit is electrically connected to an input end of the radio frequency processing module, wherein

The combining circuit is configured to combine a plurality of signals received from the plurality of inputs into a coupled signal, and send the coupled signal to the radio frequency processing module, wherein the plurality of signals includes At least two of: the first received signal, the first transmitted signal, the second received signal, and the second transmitted signal;

The radio frequency processing module is configured to identify the plurality of signals from the coupled signals, perform down-conversion processing on the plurality of signals, obtain a plurality of to-be-detected signals, and generate the plurality of to-be-detected signals Send to the baseband processing module.
The signal processing circuit according to claim 3, wherein

The combining circuit is configured to combine the plurality of signals received from the plurality of input terminals into the coupled signal by means of time-division round sampling, or receive from the plurality of inputs The plurality of signals are combined into the coupled signal by way of waveform superposition.
The signal processing circuit according to claim 3, wherein said combining circuit comprises: a single-pole multi-throw switching circuit.
The signal processing circuit according to claim 1 or 2, wherein

The first directional coupling circuit includes: a dual directional coupler, or two single-sided directional couplers;

Where the signal processing circuit includes a second directional coupling circuit, the second directional coupling circuit comprises: a dual directional coupler, or two single directional couplers.
The signal processing circuit according to claim 6, wherein

Where the first directional coupling circuit is a dual directional coupler, the first forward output of the dual directional coupler is configured to output the separated first received signal, the dual directional coupler The first inverted output is configured to output the separated first transmit signal; or

Where the signal processing circuit includes a second directional coupling circuit and the second directional coupling circuit is a dual directional coupler, the second forward output of the dual directional coupler is configured to output the separated The second received signal is configured, and the second inverted output of the dual directional coupler is configured to output the separated second transmit signal.
The signal processing circuit according to claim 6, wherein

In the case where the first directional coupling circuit is two single-sided directional couplers, an output of the first one-sided directional coupler in the first directional coupling circuit is configured to output the separated a receiving signal, an output of the second one-sided directional coupler in the first directional coupling circuit being configured to output the separated first transmit signal; or

In the case where the signal processing circuit includes a second directional coupling circuit and the second directional coupling circuit is two single-sided directional couplers, the third one-sided directional coupler of the second directional coupling circuit The output is arranged to output the separated second received signal, and the output of the fourth one-sided directional coupler in the second directional coupling circuit is arranged to output the separated second transmit signal.
The signal processing circuit according to any one of claims 1 to 8, wherein the first received signal, the first transmitted signal, the second received signal, and the second transmitted signal are in a frequency band of one or Multiple frequency bands dedicated to mobile communications, and/or one or more unlicensed bands.
The signal processing circuit according to claim 9, wherein

The one or more dedicated bands for mobile communication include at least one of the following: a GSM band of a global mobile communication system, a CDMA band of a code division multiple access mobile communication system, a TD-SCDMA band of a time division synchronous code division multiple access mobile communication system, and a wideband code division Multi-access mobile communication system WCDMA frequency band, long-term evolution LTE frequency band;

The unlicensed frequency band includes: a wireless fidelity network WIFI frequency band.
A user equipment comprising: the signal processing circuit according to any one of claims 1 to 10.
A signal processing method includes:

Separating the received signal and the transmitted signal on the antenna by a directional coupling circuit connected in series on a common path between the antenna and the RF processing module;

Performing down-conversion processing on the received signal and the transmit signal, respectively, to obtain a plurality of to-be-detected signals, and sending the multiple to-be-detected signals to a baseband processing module, where the baseband processing module detects the multiple The signal strength of the signal to be detected.
The method of claim 12, wherein the baseband processing module detects the plurality of signals to be detected After the intensity of the number, the method further includes at least one of the following:

Obtaining a signal strength of the received signal and a signal strength of the transmitted signal, and respectively displaying a signal strength of the received signal and a signal strength of the transmitted signal; or

Superimposing signal strengths of the plurality of signals to be detected, obtaining a first signal strength, and displaying the first signal strength; or

Obtaining location information corresponding to signal strengths of the plurality of to-be-detected signals, and displaying a relationship between signal strengths of the plurality of to-be-detected signals and the location information; or

Transmitting the signal strengths of the plurality of signals to be detected to the server.
The method of claim 12, wherein after the baseband processing module detects the signal strength of the plurality of signals to be detected, the method further comprises:

Determining whether a signal strength of the plurality of to-be-detected signals is within a preset threshold;

And determining, in a case that the signal strength of the plurality of to-be-detected signals is within the preset threshold, displaying a security level corresponding to the preset threshold.