CN111327336A

CN111327336A - Radio frequency receiving circuit, signal receiving method and electronic equipment

Info

Publication number: CN111327336A
Application number: CN202010131477.9A
Authority: CN
Inventors: 叶翀
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-06-23
Anticipated expiration: 2040-02-28
Also published as: CN111327336B

Abstract

The invention provides a radio frequency receiving circuit, a signal receiving method and an electronic device, wherein the radio frequency receiving circuit comprises: a first switch; the signal processing device is connected with the first end of the first switch and is connected to the dual-frequency antenna; the first end of the first switch is communicated with the first matching port or the second matching port; a first receiving port of the receiver is connected with a first matching port, a second receiving port is connected with a second matching port, and a time slot control port is connected with a first switch; and the first switch is controlled by the time slot control port to be communicated with the signal processing device and the first matching port or the second matching port. The invention can realize dual-channel combination, improve the positioning precision while quickly positioning, ensure the PCB layout and reduce the manufacturing cost.

Description

Radio frequency receiving circuit, signal receiving method and electronic equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a radio frequency receiving circuit, a signal receiving method, and an electronic device.

Background

At present, more and more electronic devices can support the L5 frequency band (1176.45MHz ± 10.23MHz) of the Global Positioning System (GPS), and in the future, more and more electronic devices can support the BDS (bei dou navigation Satellite System) B2 frequency band (1207.14MHz ± 10.23 MHz). These new GNSS (Global Navigation Satellite System) frequency bands achieve better positioning accuracy due to higher code rate.

However, the high bandwidth receiver system will accumulate more noise in the same bandwidth, and the satellite has a limited transmitter power, which makes the new GNSS band less sensitive than the old band. And the high-rate code words are more difficult in the code capturing process, so that the positioning time of a new GNSS frequency band is longer than that of an old frequency band. Therefore, both the conventional GNSS frequency band and the GNSS new frequency band must be designed simultaneously on the electronic device (as shown in fig. 1), otherwise, the positioning accuracy is improved while the sensitivity and the positioning time cannot be considered. This inevitably requires the use of two paths or even two antennas to achieve both rapid positioning and improved positioning accuracy.

The above scheme using two GNSS channels not only increases the cost, but also increases the difficulty in distributing the PCB (printed circuit Board) of the electronic device, and even abandons the design of GNSS multi-frequency (GPSL5) due to insufficient area of the PCB.

Disclosure of Invention

The embodiment of the invention provides a radio frequency receiving circuit, a signal receiving method and electronic equipment, and aims to solve the problems that in the prior art, two GNSS (global navigation satellite system) channels are used in a receiving system to increase the cost and the PCB (printed circuit board) layout is difficult to increase.

In order to solve the above problem, the embodiment of the present invention is implemented as follows:

in a first aspect, an embodiment of the present invention provides a radio frequency receiving circuit, including:

a first switch;

the signal processing device is connected with the first end of the first switch and is connected to the dual-frequency antenna;

the first end of the first switch is communicated with the first matching port or the second matching port;

a first receiving port of the receiver is connected with the first matching port, a second receiving port of the receiver is connected with the second matching port, and a time slot control port of the receiver is connected with the first switch;

the receiver controls the first switch to be communicated with the signal processing device and the first matching port through the time slot control port, or controls the first switch to be communicated with the signal processing device and the second matching port.

In a second aspect, an embodiment of the present invention provides a signal receiving method, which is applied to the above radio frequency receiving circuit, and the method includes:

under the condition that the first switch is controlled to be communicated with the signal processing device and the first matching port, receiving a signal of a first frequency band transmitted by the dual-frequency antenna;

under the condition that the first switch is controlled to be communicated with the signal processing device and the second matching port, receiving a signal of a second frequency band transmitted by the dual-frequency antenna;

the GPS satellite is used for transmitting signals of the first frequency band and signals of the second frequency band, and the code rate of the signals of the second frequency band is larger than that of the signals of the first frequency band.

In a third aspect, an embodiment of the present invention provides an electronic device, which includes the above radio frequency receiving circuit.

According to the technical scheme, the two GNSS channels are combined into one by using the positioning time slot of the dual-frequency GNSS, the positioning precision is further improved while the positioning is fast, the dual-channel combination can be realized by only adding one switch on the structure, and the manufacturing cost can be reduced while the PCB layout is ensured.

Drawings

FIG. 1 shows a prior art dual RF receive path schematic;

FIG. 2 is a first schematic diagram of an RF receiving circuit according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a third filter unit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a second RF receiving circuit according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a signal receiving method according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a real-time electronic device hardware structure according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

An embodiment of the present invention provides a radio frequency receiving circuit, as shown in fig. 2, including:

a first switch 11; a signal processing device 2 connected to a first end of the first switch 11, the signal processing device 2 being connected to the dual-band antenna 3; a first matching port 41 and a second matching port 42 connected to a second end of the first switch 11, the first end of the first switch 11 being in communication with the first matching port 41 or the second matching port 42; in the receiver 5, a first receiving port 51 of the receiver 5 is connected to the first matching port 41, a second receiving port 52 of the receiver 5 is connected to the second matching port 42, and a time slot control port 53 of the receiver 5 is connected to the first switch 11; wherein, the receiver 5 controls the first switch 11 to connect the signal processing device 2 and the first matching port 41 through the time slot control port 53, or controls the first switch 11 to connect the signal processing device 2 and the second matching port 42.

The radio frequency receiving circuit of the embodiment of the invention comprises: the dual-band antenna comprises a dual-band antenna 3, a signal processing device 2 connected with the dual-band antenna 3 and used for processing signals transmitted by the dual-band antenna 3, a first switch 11 connected with the signal processing device 2, and a receiver 5 communicated with the first switch 11 through a first matching port 41 or a second matching port 42.

The first end of the first switch 11 is connected to the signal processing device 2, the second end of the first switch 11 includes two ports, which are respectively connected to the first matching port 41 and the second matching port 42, and the first end can be communicated with only one of the ports at the same time, that is, the first switch 11 can communicate the signal processing device 2 and the first matching port 41 or communicate the signal processing device 2 and the second matching port 42.

The first receiving port 51 of the receiver 5 is connected to the first matching port 41, the second receiving port 52 of the receiver 5 is connected to the second matching port 42, and the time slot control port 53 of the receiver 5 is connected to the first switch 11, so as to control the first switch 11 to connect the signal processing device 2 and the first matching port 41 or connect the signal processing device 2 and the second matching port 42.

When the timeslot control port 53 controls the first switch 11 to connect the signal processing device 2 and the first matching port 41, the dual-band antenna 3, the signal processing device 2, the first switch 11, the first matching port 41 and the receiver 5 are connected; when the timeslot control port 53 controls the first switch 11 to connect the signal processing device 2 and the second matching port 42, the dual-band antenna 3, the signal processing device 2, the first switch 11, the second matching port 42, and the receiver 5 are connected.

The radio frequency signal received when the first switch 11 is connected to the signal processing device 2 and the first matching port 41 corresponds to a first frequency band, the radio frequency signal received when the first switch 11 is connected to the signal processing device 2 and the second matching port 42 corresponds to a second frequency band, the signal frequency of the second frequency band is smaller than that of the first frequency band, and the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band, so that the positioning can be performed by using the radio frequency signals of different frequency bands, and the positioning accuracy can be improved by using a high code rate while the quick positioning is realized.

Above-mentioned process can unite two into one two the route through the control of time slot control port to first switch, can reduce manufacturing cost when guaranteeing PCB cloth board, and fixes a position respectively through the radio frequency signal of two frequency channels, promotes positioning accuracy when can realizing quick location.

Optionally, in an embodiment of the present invention, as shown in fig. 2, after the receiver 5 controls the first switch 11 to connect the signal processing device 2 and the first matching port 41 through the timeslot control port 53, the first receiving port 51 receives a signal of a first frequency band transmitted by the dual-band antenna 3, and the receiver 5 is located in a first area according to the signal of the first frequency band.

When the receiver 5 controls the first switch 11 to connect the signal processing device 2 and the first matching port 41 through the timeslot control port 53, the dual-band antenna 3, the signal processing device 2, the first switch 11, the first matching port 41 and the receiver 5 are connected, at this time, the receiver 5 may receive a signal in a first frequency band, and after receiving the signal in the first frequency band, initial positioning may be performed by using the signal in the first frequency band to determine a first area, thereby implementing fast positioning.

The first switch is controlled to be communicated with the signal processing device and the first matching port, initial positioning is carried out according to the received signal of the first frequency band, and the first area can be quickly positioned.

Optionally, in an embodiment of the present invention, as shown in fig. 2, after the receiver 5 locates to the first area according to the signal of the first frequency band, the timeslot is allocated to the first matching port 41 and the second matching port 42 through the timeslot control port 53;

in each unit time, the first matching port 41 corresponds to a first duration, and the second matching port 42 corresponds to a second duration, which is greater than the first duration.

After the receiver 5 performs initial positioning according to the signal of the first frequency band, timeslot allocation may be performed for the first matching port 41 and the second matching port 42 through the timeslot control port 53, where the timeslot allocation principle is as follows: in each unit time, the duration corresponding to the second matching port 42 is longer than the duration corresponding to the first matching port 41. Where the unit time is in milliseconds.

Optionally, in the second duration, the receiver 5 controls the first switch 11 to communicate the signal processing device 2 and the second matching port 42 through the timeslot control port 53, the second receiving port 52 receives a signal of the second frequency band transmitted by the dual-frequency antenna 3, a code rate of the signal of the second frequency band is greater than a code rate of the signal of the first frequency band, the receiver 5 is located in a second area according to the signal of the second frequency band, and the second area is located in the first area; in a first time period, the receiver 5 controls the first switch 11 to connect the signal processing device 2 and the first matching port 41 through the time slot control port 53, and the receiver 5 tracks the position of the GPS satellite according to the signal of the first frequency band;

wherein the GPS satellites transmit signals in a first frequency band and signals in a second frequency band.

In the second time period, the first switch 11 is connected to the signal processing device 2 and the second matching port 42, and at this time, the receiver 5 receives the signal of the second frequency band through the second receiving port 52, performs pilot frequency acquisition according to the high code rate, and performs operations such as removing ionosphere factors by multi-frequency operation, improving positioning accuracy by the high code rate, and the like, so as to determine the second area located in the first area on the basis of the first area, and ensure accurate positioning. Wherein, the receiver 5 takes a longer time per unit time because the receiver needs a longer time to perform the pilot capture and calculation through the second receiving port 52 and the second matching port 42.

During the first time period, the first switch 11 connects the signal processing device 2 and the first matching port 41, and the receiver 5 receives the signal of the first frequency band through the first receiving port 51, and tracks the position of the GPS satellite according to the signal of the first frequency band.

It should be noted that the second duration corresponding to the second matching port 42 may be continuous or discontinuous in time per unit time. The second duration corresponds to one time period in the unit time for the case where the second duration is continuous, and the second duration corresponds to at least two time periods in the unit time for the case where the second duration is discontinuous. Preferably, the second time period includes a first time period and a second time period which are discontinuous in time sequence, and the first time period, the first time period and the second time period are continuous in time sequence in unit time, so that the second time period is divided into two time periods by the first time period. Of course, the situation that the second duration is not continuous is not limited to this.

The first duration in each unit time may be different, and the corresponding second duration may also be different. If the first duration and the second duration in each unit time are the same, the distribution mode of the first duration and the second duration in the unit time may be different, and the second duration may be continuous or discontinuous. That is, for a plurality of unit times, the distribution manner of the first duration and the second duration in each unit time may be adjusted, but it is required to ensure that the second duration is greater than the first duration. The following describes the procedure of initial positioning and accurate positioning with a specific example:

the timeslot control port 53 will control the receiving timeslots of two different frequency bands of the GNSS, and the timeslot control principle is: when the GNSS is cold started, the path is switched to the first matching port 41, so that the receiving path corresponding to the first matching port 41 receives a signal (for example, receives a signal corresponding to a GPS L1 frequency band), thereby implementing quick positioning. After positioning is achieved, the time slot of the receiving path corresponding to the first matching port 41 in unit time is reduced to 1/10, only the position of the GPS satellite is tracked, the receiving path corresponding to the second matching port 42 (for example, the receiving path receives a signal corresponding to the GPS L5 frequency band, the code rate of the signal is greater than that of the signal of the GPS L1 frequency band) uses the time slot of 9/10 to perform pilot frequency capturing, and after the pilot frequency capturing, operations such as removing ionospheric factors through multi-frequency operation, improving positioning accuracy through high code rate and the like can be performed. I.e., the second matched port 42 remains high in the location slot allocation at the late stage of location.

The traditional GNSS frequency band is used in the early stage of GNSS positioning, rapid positioning can be achieved, most of receiving time slots are allocated to a new GNSS frequency band after positioning, positioning comprehensive operation is carried out after high-code-rate pilot frequency capturing, GNSS positioning accuracy is improved, and the functions of rapid positioning and improvement of positioning accuracy can be achieved after multiple frequency bands are tracked.

Optionally, in an embodiment of the present invention, the first matching port 41 is configured to adjust a network function entity NF operating area of the signal processing apparatus 2 to a first frequency band, and the second matching port 42 is configured to adjust the NF operating area of the signal processing apparatus 2 to a second frequency band.

The first matching port 41 may adjust an optimal NF (Network Function entity) working area of the signal processing apparatus 2 to a first frequency band, such as a 1555MHz to 1615MHz frequency band, which may include a GPS L1 frequency band, a beidou B1 frequency band, and a GLO (Global Navigation Satellite System) frequency band; the second matching port 42 may adjust the optimal NF operating region of the signal processing apparatus 2 to a second frequency band, such as 1170MHz to 1210MHz, which may include a GPSL5 frequency band and a beidou B2 frequency band.

The first matching port 41 may enable the receiver 5 to receive signals of the first frequency band by adjusting the NF operating region of the signal processing apparatus 2 to the first frequency band, and the second matching port 42 may enable the receiver 5 to receive signals of the second frequency band by adjusting the NF operating region of the signal processing apparatus 2 to the second frequency band.

Optionally, in an embodiment of the present invention, as shown in fig. 2, the rf receiving circuit further includes:

a first filtering unit 61 connecting the first receiving port 51 and the first matching port 41, and a second filtering unit 62 connecting the second receiving port 52 and the second matching port 42.

By providing the first filtering unit 61 between the first receiving port 51 and the first matching port 41, the signal in the first frequency band passing through the first matching port 41 can be filtered and transmitted to the receiver 5, and by providing the second filtering unit 62 between the second receiving port 52 and the second matching port 42, the signal in the second frequency band passing through the second matching port 42 can be filtered and transmitted to the receiver 5.

Optionally, in an embodiment of the present invention, as shown in fig. 2, the signal processing apparatus 2 includes:

a third filtering unit 21 connected to the dual band antenna 3, and a low noise amplifier 22 connected to the third filtering unit 21, the low noise amplifier 22 being connected to a first end of the first switch 11.

The signal processing device 2 includes a third filtering unit 21 connected to the dual-band antenna 3 and a low noise amplifier 22 connected to the third filtering unit 21, where the third filtering unit 21 is configured to filter a signal transmitted by the dual-band antenna 3 and transmit the filtered signal to the low noise amplifier 22, and transmit the processed signal to the first matching port 41 or the second matching port 42 through the first switch 11 after the processed signal is processed by the low noise amplifier 22.

The first matching port 41 adjusts the NF operating region of the low noise amplifier 22 to a first frequency band, and the second matching port 42 adjusts the NF operating region of the low noise amplifier 22 to a second frequency band.

In the design of fig. 2, the third filtering unit 21 is a characteristic filter that filters out the signal of the first frequency band and the signal of the second frequency band at the same time, and when the first frequency band corresponds to the GPS L1 and the second frequency band corresponds to the GPS L5, the frequency response characteristic can be shown as shown in fig. 3, as can be seen from fig. 3, for the L1\ L5 frequency band, because the frequency band distance is close, the suppression requirement is high, and the filter is a brand new requirement, the design and production difficulty is large.

Therefore, another structure is further provided in the embodiment of the present invention, as shown in fig. 4, the third filtering unit includes a first filter 211 and a second filter 212, and the rf receiving circuit further includes: a second switch 12 disposed between the dual band antenna 3 and the third filtering unit, and a third switch 13 disposed between the third filtering unit and the low noise amplifier 22; the slot control port 53 of the receiver 5 is connected to the second switch 12 and the third switch 13.

The second switch 12 is disposed between the dual band antenna 3 and the third filtering unit for controlling the dual band antenna 3 to communicate with the first filter 211 or the second filter 212, and the third switch 13 is disposed between the third filtering unit and the low noise amplifier 22 for controlling the low noise amplifier 22 to communicate with the first filter 211 or the second filter 212. The slot control port 53 of the receiver 5 is connected to the second switch 12 and the third switch 13 for controlling the second switch 12 and the third switch 13.

The first switch 11, the second switch 12 and the third switch 13 are all single-pole double-throw switches; the first end of the first switch 11 is a moving end, the second end of the first switch 11 forms a first fixed end and a second fixed end, the first fixed end of the first switch 11 is connected to the first matching port 41, the second fixed end of the first switch 11 is connected to the second matching port 42, and the moving end of the first switch 11 is connected to the output end of the low noise amplifier 22;

a moving terminal of the second switch 12 is connected to the dual-band antenna 3, a first fixed terminal of the second switch 12 is connected to an input terminal of the first filter 211, and a second fixed terminal of the second switch 12 is connected to an input terminal of the second filter 212;

the moving terminal of the third switch 13 is connected to the input terminal of the low noise amplifier 22, the first stationary terminal of the third switch 13 is connected to the output terminal of the first filter 211, and the second stationary terminal of the third switch 13 is connected to the output terminal of the second filter 212.

The first switch 11, the second switch 12 and the third switch 13 are all single-pole double-throw switches, and include a movable end, a first immovable end and a second immovable end. The moving end of the first switch 11 is connected to the output end of the noise amplifier 22, the first fixed end is connected to the first matching port 41, the second fixed end is connected to the second matching port 42, when the moving end is communicated with the first fixed end, the signal is transmitted to the first receiving port 51 through the first matching port 41, and when the moving end is communicated with the second fixed end, the signal is transmitted to the second receiving port 52 through the second matching port 42.

The moving end of the second switch 12 is connected to the dual-band antenna 3, the first fixed end is connected to the input end of the first filter 211, the second fixed end is connected to the input end of the second filter 212, when the moving end is communicated with the first fixed end, the first filter 211 processes the signal transmitted by the dual-band antenna 3 and outputs the signal of the first frequency band, and when the moving end is communicated with the second fixed end, the second filter 212 processes the signal transmitted by the dual-band antenna 3 and outputs the signal of the second frequency band.

The active end of the third switch 13 is connected to the input end of the low noise amplifier 22, the first inactive end is connected to the output end of the first filter 211, the second inactive end is connected to the output end of the second filter 212, when the active end and the first inactive end are communicated, the signal of the first frequency band processed by the first filter 211 is transmitted to the low noise amplifier 22, and when the active end and the second inactive end are communicated, the signal of the second frequency band processed by the second filter 212 is transmitted to the low noise amplifier 22.

Optionally, in an embodiment of the present invention, when the receiver 5 controls the moving ends of the first switch 11, the second switch 12, and the third switch 13 to be connected to the first stationary end through the timeslot control port 53, the dual-band antenna 3, the first filter 211, the low-noise amplifier 22, the first matching port 41, and the first receiving port 51 are communicated to form a first receiving link;

when the receiver 5 controls the moving terminals of the first switch 11, the second switch 12 and the third switch 13 to be connected with the second stationary terminal through the timeslot control port 53, the dual-band antenna 3, the second filter 212, the low noise amplifier 22, the second matching port 42 and the second receiving port 52 are communicated to form a second receiving link.

The timeslot control port 53 is connected to the first switch 11, the second switch 12, and the third switch 13, and can control the movable terminals of the first switch 11, the second switch 12, and the third switch 13 to communicate with the first stationary terminal or the second stationary terminal. When the moving ends of the 3 switches are communicated with the first stationary end, the dual-band antenna 3, the first filter 211, the low noise amplifier 22, the first matching port 41 and the first receiving port 51 are communicated to form a first receiving link, and the receiver 5 receives the signal of the first frequency band through the first receiving link. When the moving ends of the 3 switches are communicated with the second fixed end, the dual-band antenna 3, the second filter 212, the low noise amplifier 22, the second matching port 42 and the second receiving port 52 are communicated to form a second receiving chain, and the receiver 5 receives the signal of the second frequency band through the second receiving chain.

By adding two switches, the consistency of state change of the three switches during signal receiving is realized, and the control of the three switches is completed only by using one path of time slot control port, namely GPIO (General Purpose Input/Output), so that the receiver does not influence each other when receiving signals of different frequency bands, and the condition that the power of the low noise amplifier is not saturated is ensured.

Optionally, in an embodiment of the present invention, in a case that the first receiving link is connected, the receiver 5 receives a signal of a first frequency band transmitted by the dual-band antenna 3, and locates to the first area according to the signal of the first frequency band;

after positioning to the first area, the receiver 5 performs time slot allocation for the first receiving link and the second receiving link through the time slot control port 53;

in each unit time, the first receiving link corresponds to a first duration, the second receiving link corresponds to a second duration, and the second duration is greater than the first duration;

wherein, the first receiving link is connected in the first time length, and the receiver 5 tracks the GPS satellite according to the signal of the first frequency band transmitted by the first receiving link; and the second receiving link is communicated within the second time length, the receiver 5 is positioned in a second area according to the signal of the second frequency band transmitted by the second receiving link, the second area is positioned in the first area, the GPS satellite transmits the signal of the first frequency band and the signal of the second frequency band, and the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band.

The receiver 5 firstly receives the signal of the first frequency band transmitted by the dual-frequency antenna 3 through the first receiving link, and performs initial positioning according to the signal of the first frequency band to determine a first area. After the first area is determined, timeslot allocation is performed for the first receiving link and the second receiving link through the timeslot control port 53, specifically:

and controlling the first receiving link to correspond to a first time length and the second receiving link to correspond to a second time length in each unit time, wherein the second time length is greater than the first time length.

And the second receiving link is communicated in the second time length, the receiver 5 receives the signal of the second frequency band transmitted by the dual-frequency antenna 3 through the second receiving link, and because the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band, accurate positioning can be performed according to the signal of the second frequency band, so that the second area with a smaller range can be further determined in the first area. During the first time period, the first receiving link is connected, and the receiver 5 tracks the position of the GPS satellite according to the signal of the first frequency band transmitted by the first receiving link.

In the implementation process of the radio frequency receiving circuit in the embodiment of the invention, two GNSS channels are combined into one by using the positioning time slot of a dual-frequency GNSS and the characteristic of a wide frequency band of a low-noise amplifier, the receiving of a plurality of GNSS frequency bands is realized by using one radio frequency channel, the quick positioning and high-precision tracking at low cost are realized by using the positioning characteristics of different frequency bands, and the layout area of a PCB is also saved.

By utilizing the consistency of the state changes of the three switches during signal receiving, the control of the three switches is completed by only one time slot control port, so that the receivers do not influence each other when receiving signals of different frequency bands.

An embodiment of the present invention further provides a signal receiving method, which is applied to the radio frequency receiving circuit described above, and as shown in fig. 5, the signal receiving method includes:

step 501, receiving a signal of a first frequency band transmitted by a dual-frequency antenna under the condition that a first switch is controlled to connect a signal processing device and a first matching port.

And 502, receiving a signal of a second frequency band transmitted by the dual-frequency antenna under the condition that the first switch is controlled to be communicated with the signal processing device and the second matching port.

When the receiver controls the first switch to be communicated with the signal processing device and the first matching port through the time slot control port, the signal of a first frequency band transmitted by the dual-frequency antenna can be received, and when the receiver controls the first switch to be communicated with the signal processing device and the second matching port through the time slot control port, the signal of a second frequency band transmitted by the dual-frequency antenna can be received.

After receiving the signal of the first frequency band, initial positioning can be carried out to determine the first area, or GPS satellite tracking can be carried out according to the signal of the first frequency band, and after receiving the signal of the second frequency band, accurate positioning can be carried out by utilizing high code rate to determine the second area with smaller range on the basis of the first area.

Optionally, the receiving a signal of a first frequency band transmitted by a dual-band antenna includes:

receiving a signal of a first frequency band transmitted by the dual-frequency antenna and processed by the signal processing device through a first receiving port; positioning to a first area according to the signal of the first frequency band;

after the GPS satellite is positioned to a first area and time slot allocation is carried out on a first matching port and a second matching port through a time slot control port, signals of a first frequency band are received within a first time length of each unit time, and the position of the GPS satellite is tracked according to the signals of the first frequency band;

and in each unit time, the first matching port corresponds to a first duration, the second matching port corresponds to a second duration, and the second duration is greater than the first duration.

The first frequency band signal is received through a first receiving port before initial positioning, and initial positioning is performed according to the first frequency band signal to determine a first area. After the initial positioning is completed and the time slot allocation is performed on the first matching port and the second matching port through the time slot control port, the signal of the first frequency band is received within the first time length of the unit time, and the position of the GPS satellite is tracked according to the received signal of the first frequency band.

Optionally, the receiving a signal of a second frequency band transmitted by the dual-band antenna includes:

after the first matching port and the second matching port are positioned in the first area and time slot allocation is carried out on the first matching port and the second matching port through the time slot control port, signals of a second frequency band transmitted by the dual-frequency antenna and processed by the signal processing device are received through the second receiving port in a second time length of each unit time; and positioning to the second area according to the signals of the second frequency band.

After the initial positioning is needed to receive the signal of the second frequency band, after the first region is determined and the time slot allocation is performed on the first matching port and the second matching port through the time slot control port, the signal of the second frequency band can be received through the second receiving port within the second duration of each unit time, and the accurate positioning is performed according to the signal of the second frequency band, so that the second region with a smaller range is determined on the basis of the first region.

Wherein, signal processing apparatus includes: the second filtering unit is connected with the first switch and comprises a second filter and a third filter, wherein the second filter is connected with the second switch; the radio frequency receiving circuit further includes: the first switch, the second switch and the third switch are all connected to the time slot control port;

receiving signals of a first frequency band transmitted by a dual-frequency antenna, comprising:

under the condition that a time slot control port controls a first switch to be communicated with a low noise amplifier and a first matching port, a second switch to be communicated with a dual-frequency antenna and a first filter, and a third switch to be communicated with the low noise amplifier and the first filter, receiving a signal of a first frequency band transmitted by the dual-frequency antenna through a first receiving link;

the dual-frequency antenna, the first filter, the low noise amplifier, the first matching port and the first receiving port form a first receiving chain.

When receiving the signal of the first frequency band, before performing the initial positioning, or within a first time length of each unit time after the initial positioning, the time slot control port controls the first switch to communicate the low noise amplifier and the first matching port, the second switch to communicate the dual-frequency antenna and the first filter, and the third switch to communicate the low noise amplifier and the first filter, so as to receive the signal of the first frequency band transmitted by the dual-frequency antenna and sequentially passing through the first filter, the low noise amplifier, the first matching port, and the first receiving port.

under the condition that the time slot control port controls the first switch to be communicated with the low noise amplifier and the second matching port, the second switch is communicated with the dual-frequency antenna and the second filter, and the third switch is communicated with the low noise amplifier and the second filter, receiving a signal of a second frequency band transmitted by the dual-frequency antenna through a second receiving link;

the dual-frequency antenna, the second filter, the low noise amplifier, the second matching port and the second receiving port form a second receiving chain.

When receiving the signal of the second frequency band, the time slot control port may control the first switch to communicate with the low noise amplifier and the second matching port, the second switch to communicate with the dual-frequency antenna and the second filter, and the third switch to communicate with the low noise amplifier and the second filter within a second time period of each unit time after the initial positioning, so as to receive the signal of the second frequency band transmitted by the dual-frequency antenna and sequentially passing through the second filter, the low noise amplifier, the second matching port, and the second receiving port.

The signal receiving method combines two GNSS channels into one by utilizing the characteristics of the positioning time slot of the double-frequency GNSS and the broadband of the low-noise amplifier, realizes the receiving of a plurality of GNSS frequency bands through one radio frequency channel, realizes the quick positioning and high-precision tracking under the low cost by utilizing the positioning characteristics of different frequency bands, and also saves the layout area of a PCB.

An embodiment of the present invention further provides an electronic device, fig. 6 is a schematic diagram of a hardware structure of an electronic device for implementing various embodiments of the present invention, where the electronic device 600 includes, but is not limited to: a radio frequency unit 601, a network module 602, an audio output unit 603, an input unit 604, a sensor 605, a display unit 606, a user input unit 607, an interface unit 608, a memory 609, a processor 610, and a power supply 611. The radio frequency unit 601 includes the radio frequency receiving circuit described above.

The radio frequency receiving circuit includes: a first switch; the signal processing device is connected with the first end of the first switch and is connected to the dual-frequency antenna; the first end of the first switch is communicated with the first matching port or the second matching port; a first receiving port of the receiver is connected with the first matching port, a second receiving port of the receiver is connected with the second matching port, and a time slot control port of the receiver is connected with the first switch; the receiver controls the first switch to be communicated with the signal processing device and the first matching port through the time slot control port, or controls the first switch to be communicated with the signal processing device and the second matching port.

Optionally, after the receiver controls the first switch to connect the signal processing device and the first matching port through the time slot control port, the first receiving port receives a signal of a first frequency band transmitted by the dual-frequency antenna, and the receiver is positioned to the first area according to the signal of the first frequency band.

Optionally, after the receiver is located in the first area according to the signal of the first frequency band, time slot allocation is performed for the first matching port and the second matching port through the time slot control port;

in each unit time, the first matching port corresponds to a first duration, the second matching port corresponds to a second duration, and the second duration is greater than the first duration.

Optionally, in a second duration, the receiver controls the first switch to connect the signal processing device and the second matching port through the timeslot control port, the second receiving port receives a signal of a second frequency band transmitted by the dual-frequency antenna, a code rate of the signal of the second frequency band is greater than a code rate of the signal of the first frequency band, the receiver is positioned to a second area according to the signal of the second frequency band, and the second area is located in the first area;

in a first time period, the receiver controls a first switch to be communicated with the signal processing device and the first matching port through the time slot control port, and tracks the position of the GPS satellite according to the signal of the first frequency band;

Optionally, the first matching port is configured to adjust a network function entity NF working area of the signal processing apparatus to a first frequency band, and the second matching port is configured to adjust the NF working area of the signal processing apparatus to a second frequency band.

Optionally, the radio frequency receiving circuit further includes:

the first filter unit is connected with the first receiving port and the first matching port, and the second filter unit is connected with the second receiving port and the second matching port.

Optionally, the signal processing apparatus includes:

the first switch is connected with the first end of the first switch, and the second switch is connected with the second end of the second switch.

Optionally, the third filtering unit includes a first filter and a second filter.

Optionally, the radio frequency receiving circuit further includes: the second switch is arranged between the dual-frequency antenna and the third filtering unit, and the third switch is arranged between the third filtering unit and the low noise amplifier; the time slot control port of the receiver is connected to the second switch and the third switch.

Optionally, the first switch, the second switch and the third switch are all single-pole double-throw switches; the first end of the first switch is a movable end, the second end of the first switch forms a first immovable end and a second immovable end, the first immovable end of the first switch is connected to the first matching port, the second immovable end of the first switch is connected to the second matching port, and the movable end of the first switch is connected to the output end of the low-noise amplifier; the movable end of the second switch is connected to the dual-frequency antenna, the first immovable end of the second switch is connected to the input end of the first filter, and the second immovable end of the second switch is connected to the input end of the second filter; the movable end of the third switch is connected to the input end of the low noise amplifier, the first fixed end of the third switch is connected to the output end of the first filter, and the second fixed end of the third switch is connected to the output end of the second filter.

Optionally, when the receiver controls the movable ends of the first switch, the second switch and the third switch to be connected with the first stationary end through the time slot control port, the dual-band antenna, the first filter, the low noise amplifier, the first matching port and the first receiving port are communicated to form a first receiving link;

when the receiver controls the movable ends of the first switch, the second switch and the third switch to be connected with the second immovable end through the time slot control port, the dual-frequency antenna, the second filter, the low-noise amplifier, the second matching port and the second receiving port are communicated to form a second receiving link.

Optionally, under the condition that the first receiving link is connected, the receiver receives a signal of a first frequency band transmitted by the dual-frequency antenna, and locates to the first area according to the signal of the first frequency band;

after the first receiving link and the second receiving link are positioned in the first area, the receiver carries out time slot allocation on the first receiving link and the second receiving link through a time slot control port;

the first receiving link is communicated within the first time length, and the receiver tracks the position of the GPS satellite according to the signal of the first frequency band transmitted by the first receiving link; and the second receiving link is communicated within the second time length, the receiver is positioned to a second area according to the signal of the second frequency band transmitted by the second receiving link, the second area is positioned in the first area, the GPS satellite transmits the signal of the first frequency band and the signal of the second frequency band, and the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band.

Those skilled in the art will appreciate that the electronic device configuration shown in fig. 6 does not constitute a limitation of the electronic device, and that the electronic device may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

Wherein, the radio frequency unit 601 is configured to: under the condition that the first switch is controlled to be communicated with the signal processing device and the first matching port, receiving a signal of a first frequency band transmitted by the dual-frequency antenna; under the condition that the first switch is controlled to be communicated with the signal processing device and the second matching port, receiving a signal of a second frequency band transmitted by the dual-frequency antenna;

Optionally, when receiving a signal of the first frequency band transmitted by the dual-band antenna, the radio frequency unit 601 is further configured to: receiving a signal of a first frequency band transmitted by the dual-frequency antenna and processed by the signal processing device through a first receiving port; the processor 610 is configured to: positioning to a first area according to the signal of the first frequency band; the radio frequency unit 601 is further configured to: after the GPS satellite is positioned to a first area and time slot allocation is carried out on a first matching port and a second matching port through a time slot control port, signals of a first frequency band are received within a first time length of each unit time, and the position of the GPS satellite is tracked according to the signals of the first frequency band;

Optionally, when receiving a signal of the second frequency band transmitted by the dual-band antenna, the radio frequency unit 601 is further configured to:

after the first matching port and the second matching port are positioned in the first area and time slot allocation is carried out on the first matching port and the second matching port through the time slot control port, signals of a second frequency band transmitted by the dual-frequency antenna and processed by the signal processing device are received through the second receiving port in a second time length of each unit time; the processor 610 is further configured to: and positioning to the second area according to the signals of the second frequency band.

Optionally, when receiving a signal of the first frequency band transmitted by the dual-band antenna, the radio frequency unit 601 is further configured to:

Therefore, the two GNSS channels are combined into one by utilizing the positioning time slot of the double-frequency GNSS and the broadband characteristic of the low-noise amplifier, the receiving of a plurality of GNSS frequency bands is realized through one radio frequency channel, the quick positioning and high-precision tracking under the low cost are realized by utilizing the positioning characteristics of different frequency bands, and the PCB layout area is also saved.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 601 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 610; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 601 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. Further, the radio frequency unit 601 may also communicate with a network and other devices through a wireless communication system.

The electronic device provides wireless broadband internet access to the user via the network module 602, such as assisting the user in sending and receiving e-mails, browsing web pages, and accessing streaming media.

The audio output unit 603 may convert audio data received by the radio frequency unit 601 or the network module 602 or stored in the memory 609 into an audio signal and output as sound. Also, the audio output unit 603 may also provide audio output related to a specific function performed by the electronic apparatus 600 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 603 includes a speaker, a buzzer, a receiver, and the like.

The input unit 604 is used to receive audio or video signals. The input Unit 604 may include a Graphics Processing Unit (GPU) 6041 and a microphone 6042, and the Graphics processor 6041 processes image data of a still picture or video obtained by an image capturing apparatus (such as a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 606. The image frames processed by the graphic processor 6041 may be stored in the memory 609 (or other storage medium) or transmitted via the radio frequency unit 601 or the network module 602. The microphone 6042 can receive sound, and can process such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 601 in case of the phone call mode.

The electronic device 600 also includes at least one sensor 605, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 6061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 6061 and/or the backlight when the electronic apparatus 600 is moved to the ear. As one type of motion sensor, an accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of an electronic device (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 605 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 606 is used to display information input by the user or information provided to the user. The Display unit 606 may include a Display panel 6061, and the Display panel 6061 may be configured by a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 607 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic device. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072. Touch panel 6071, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., operations by a user on or near touch panel 6071 using a finger, stylus, or any suitable object or accessory). The touch panel 6071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 610, receives a command from the processor 610, and executes the command. In addition, the touch panel 6071 can be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The user input unit 607 may include other input devices 6072 in addition to the touch panel 6071. Specifically, the other input devices 6072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 6071 can be overlaid on the display panel 6061, and when the touch panel 6071 detects a touch operation on or near the touch panel 6071, the touch operation is transmitted to the processor 610 to determine the type of the touch event, and then the processor 610 provides a corresponding visual output on the display panel 6061 according to the type of the touch event. Although the touch panel 6071 and the display panel 6061 are shown in fig. 6 as two separate components to implement the input and output functions of the electronic device, in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated to implement the input and output functions of the electronic device, and this is not limited here.

The interface unit 608 is an interface for connecting an external device to the electronic apparatus 600. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 608 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the electronic device 600 or may be used to transmit data between the electronic device 600 and external devices.

The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 609 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 610 is a control center of the electronic device, connects various parts of the whole electronic device by using various interfaces and lines, performs various functions of the electronic device and processes data by running or executing software programs and/or modules stored in the memory 609, and calling data stored in the memory 609, thereby performing overall monitoring of the electronic device. Processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 610.

The electronic device 600 may further include a power supply 611 (e.g., a battery) for supplying power to the various components, and preferably, the power supply 611 may be logically connected to the processor 610 via a power management system, such that the power management system may be used to manage charging, discharging, and power consumption.

In addition, the electronic device 600 includes some functional modules that are not shown, and are not described in detail herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A radio frequency receiving circuit, comprising:

a first switch (11);

a signal processing device (2) connected to a first end of the first switch (11), the signal processing device (2) being connected to a dual frequency antenna (3);

a first mating port (41) and a second mating port (42) connected to a second end of the first switch (11), a first end of the first switch (11) being in communication with the first mating port (41) or the second mating port (42);

a receiver (5), wherein a first receiving port (51) of the receiver (5) is connected with the first matching port (41), a second receiving port (52) of the receiver (5) is connected with the second matching port (42), and a time slot control port (53) of the receiver (5) is connected with the first switch (11);

wherein the receiver (5) controls the first switch (11) to communicate the signal processing device (2) and the first matching port (41) through the timeslot control port (53), or controls the first switch (11) to communicate the signal processing device (2) and the second matching port (42).

2. The rf receiving circuit according to claim 1, wherein after the receiver (5) controls the first switch (11) to connect the signal processing device (2) and the first matching port (41) through the timeslot control port (53), the first receiving port (51) receives a signal of a first frequency band transmitted by the dual-frequency antenna (3), and the receiver (5) is located in a first area according to the signal of the first frequency band.

3. The rf receiving circuit according to claim 2, wherein the receiver (5) performs time slot allocation for the first matching port (41) and the second matching port (42) through the time slot control port (53) after locating to a first region according to the signal of the first frequency band;

the first matching port (41) corresponds to a first duration and the second matching port (42) corresponds to a second duration, the second duration being greater than the first duration, per unit time.

4. The radio frequency receiving circuit of claim 3,

in the second time period, the receiver (5) controls the first switch (11) to communicate with the signal processing device (2) and the second matching port (42) through the timeslot control port (53), the second receiving port (52) receives a signal of a second frequency band transmitted by the dual-frequency antenna (3), the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band, the receiver (5) is located to a second area according to the signal of the second frequency band, and the second area is located in the first area;

during the first time period, the receiver (5) controls the first switch (11) to connect the signal processing device (2) and the first matching port (41) through the time slot control port (53), and the receiver (5) tracks the position of a Global Positioning System (GPS) satellite according to the signals of the first frequency band;

wherein the GPS satellites transmit signals in the first frequency band and signals in the second frequency band.

5. The radio frequency receiving circuit of claim 4,

the first matching port (41) is used for adjusting a network function entity (NF) working area of the signal processing device (2) to a first frequency band, and the second matching port (42) is used for adjusting the NF working area of the signal processing device (2) to a second frequency band.

6. The radio frequency receiving circuit of claim 1, further comprising:

a first filtering unit (61) connecting the first receiving port (51) and the first matching port (41), and a second filtering unit (62) connecting the second receiving port (52) and the second matching port (42).

7. A radio frequency receiving circuit according to claim 1 or 6, characterized in that the signal processing means (2) comprise:

a third filtering unit (21) connected to the dual-band antenna (3), and a low noise amplifier (22) connected to the third filtering unit (21), the low noise amplifier (22) being connected to a first end of the first switch (11).

8. The radio frequency receiving circuit of claim 7,

the third filtering unit (21) comprises a first filter (211) and a second filter (212).

9. The radio frequency receiving circuit of claim 8, further comprising:

a second switch (12) arranged between the dual band antenna (3) and the third filtering unit (21), and a third switch (13) arranged between the third filtering unit (21) and the low noise amplifier (22);

a time slot control port (53) of the receiver (5) is connected with the second switch (12) and the third switch (13).

10. The radio frequency receiving circuit of claim 9,

the first switch (11), the second switch (12) and the third switch (13) are all single-pole double-throw switches;

the first end of the first switch (11) is a movable end, the second end of the first switch (11) forms a first fixed end and a second fixed end, the first fixed end of the first switch (11) is connected to the first matching port (41), the second fixed end of the first switch (11) is connected to the second matching port (42), and the movable end of the first switch (11) is connected to the output end of the low noise amplifier (22);

a moving terminal of the second switch (12) is connected to the dual-band antenna (3), a first fixed terminal of the second switch (12) is connected to an input terminal of the first filter (211), and a second fixed terminal of the second switch (12) is connected to an input terminal of the second filter (212);

the moving end of the third switch (13) is connected to the input end of the low noise amplifier (22), the first fixed end of the third switch (13) is connected to the output end of the first filter (211), and the second fixed end of the third switch (13) is connected to the output end of the second filter (212).

11. The radio frequency receiving circuit of claim 10,

when the receiver (5) controls the movable ends of the first switch (11), the second switch (12) and the third switch (13) to be connected with a first fixed end through the time slot control port (53), the dual-frequency antenna (3), the first filter (211), the low noise amplifier (22), the first matching port (41) and the first receiving port (51) are communicated to form a first receiving link;

when the receiver (5) controls the movable ends of the first switch (11), the second switch (12) and the third switch (13) to be connected with a second fixed end through the time slot control port (53), the dual-frequency antenna (3), the second filter (212), the low noise amplifier (22), the second matching port (42) and the second receiving port (52) are communicated to form a second receiving link.

12. The radio frequency receiving circuit of claim 11,

under the condition that the first receiving link is connected, the receiver (5) receives a signal of a first frequency band transmitted by the dual-frequency antenna (3) and positions to a first area according to the signal of the first frequency band;

after positioning to a first area, the receiver (5) performs time slot allocation for the first receiving link and the second receiving link through the time slot control port (53);

wherein, in the first time period, the first receiving link is connected, and the receiver (5) tracks the position of the GPS satellite according to the signal of the first frequency band transmitted by the first receiving link; and the second receiving link is communicated in the second time length, the receiver (5) is positioned to a second area according to a signal of a second frequency band transmitted by the second receiving link, the second area is positioned in the first area, the GPS satellite transmits the signal of the first frequency band and the signal of the second frequency band, and the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band.

13. A signal receiving method applied to the radio frequency receiving circuit according to claim 1, the method comprising:

the signal of the first frequency band is used for positioning to a first area or tracking a Global Positioning System (GPS) satellite, the signal of the second frequency band is used for positioning to a second area, the second area is located in the first area, the GPS satellite transmits the signal of the first frequency band and the signal of the second frequency band, and the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band.

14. The method of claim 13, wherein receiving signals in the first frequency band transmitted by the dual-band antenna comprises:

receiving a signal of a first frequency band transmitted by the dual-frequency antenna and processed by the signal processing device through a first receiving port;

positioning to the first area according to the signal of the first frequency band;

after the GPS satellite is positioned in the first area and the time slots are allocated to the first matching port and the second matching port through the time slot control port, receiving the signal of the first frequency band within a first time length of each unit time, and tracking the position of the GPS satellite according to the signal of the first frequency band;

wherein the first matched port corresponds to a first duration and the second matched port corresponds to a second duration, the second duration being greater than the first duration, per unit time.

15. The method of claim 14, wherein receiving signals in the second frequency band transmitted by the dual-band antenna comprises:

after the first matching port and the second matching port are positioned in the first area and time slot allocation is carried out on the first matching port and the second matching port through a time slot control port, signals of a second frequency band transmitted by the dual-frequency antenna and processed by the signal processing device are received through a second receiving port within the second time length of each unit time;

and positioning to a second area according to the signal of the second frequency band.

16. The method of claim 13, wherein the signal processing device comprises: the second filtering unit is connected with the first switch, and the second filtering unit comprises a second filter and a third filter; the radio frequency receiving circuit further comprises: a second switch communicating the dual-band antenna and the first filter or communicating the dual-band antenna and the second filter, and a third switch communicating the low noise amplifier and the first filter or communicating the low noise amplifier and the second filter, wherein the first switch, the second switch and the third switch are all connected to a time slot control port;

the receiving of the signal of the first frequency band transmitted by the dual-frequency antenna includes:

under the condition that the time slot control port controls the first switch to communicate the low noise amplifier with the first matching port, the second switch to communicate the dual-band antenna with the first filter, and the third switch to communicate the low noise amplifier with the first filter, receiving the signal of the first frequency band transmitted by the dual-band antenna through a first receiving link;

wherein the dual-band antenna, the first filter, the low noise amplifier, the first matching port, and the first receive port form the first receive chain.

17. The method of claim 16, wherein receiving signals in the second frequency band transmitted by the dual-band antenna comprises:

under the condition that the time slot control port controls the first switch to communicate the low noise amplifier with the second matching port, the second switch to communicate the dual-band antenna with the second filter, and the third switch to communicate the low noise amplifier with the second filter, receiving the signal of the second frequency band transmitted by the dual-band antenna through a second receiving link;

wherein the dual-band antenna, the second filter, the low noise amplifier, the second matching port, and the second receive port form the second receive chain.

18. An electronic device, characterized in that it comprises a radio frequency receiving circuit according to any of claims 1 to 12.