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

Abstract

The invention provides a radio frequency receiving circuit, a signal receiving method and electronic equipment, wherein the radio frequency receiving circuit comprises: a first switch; a signal processing device connected to a first end of the first switch, and the signal processing device is connected to a dual-frequency antenna; The first matching port and the second matching port connected with the second end of the first switch, the first end of the first switch is connected with the first matching port or the second matching port; the receiver, the first receiving port of the receiver is connected The first matching port and the second receiving port are connected to the second matching port, and the time slot control port is connected to the first switch; and the time slot control port controls the first switch to connect the signal processing device with the first matching port or the second matching port. The invention can realize the combination of two paths, improve the positioning accuracy while quickly positioning, and reduce the manufacturing cost while ensuring the PCB layout.

Description

A radio frequency receiving circuit, signal receiving method and electronic device

technical field

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

Background technique

At present, more and more electronic devices can support GPS (Global Positioning System, global positioning system) L5 frequency band (1176.45MHz±10.23MHz), and more and more electronic devices will support BDS (BeiDouNavigation Satellite System, Beidou satellite navigation system) B2 frequency band (1207.14MHz±10.23MHz). These new GNSS (Global Navigation Satellite System, global satellite navigation system) frequency bands achieve better positioning accuracy due to higher bit rates.

However, a high-bandwidth receiver system will accumulate more noise within the same bandwidth, and the transmitter power of the satellite is limited, which makes the new GNSS frequency band less sensitive than the old frequency band. And high-rate codewords are more difficult in the code acquisition process, so that the positioning time of the new GNSS frequency band is longer than that of the old frequency band. Therefore, both the traditional GNSS frequency band and the new GNSS frequency band must be designed at the same time on electronic equipment (as shown in Figure 1), otherwise the sensitivity and positioning time cannot be taken into account while improving the positioning accuracy. In this way, it is unavoidable to use two paths or even two antennas to achieve rapid positioning and improvement of positioning accuracy at the same time.

The above solution of using two GNSS paths not only increases the cost, but also increases the difficulty of PCB (Printed Circuit Board, printed circuit board) layout of electronic equipment, and even abandons the design of GNSS multi-frequency (GPSL5) due to insufficient PCB layout area .

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a radio frequency receiving circuit, a signal receiving method, and an electronic device, so as to solve the problems of increasing costs and increasing PCB layout difficulties by using two GNSS paths in a receiving system in the prior art.

In order to solve the above problems, the embodiments of the present invention are implemented as follows:

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

the first switch;

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

a first matching port and a second matching port connected with the second end of the first switch, and the first end of the first switch is communicated with the first matching port or the second matching port;

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

Wherein, the receiver controls the first switch to connect the signal processing device and the first matching port through the time slot control port, or controls the first switch to connect 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-mentioned radio frequency receiving circuit, and the method includes:

Under the condition of controlling the first switch to connect the signal processing device and the first matching port, receiving the signal of the first frequency band transmitted by the dual-frequency antenna;

Under the condition of controlling the first switch to connect the signal processing device and the second matching port, receiving the signal of the second frequency band transmitted by the dual-frequency antenna;

The signals of the first frequency band are used to locate the first area or track GPS satellites, the signals of the second frequency band are used to locate to the second area, the second area is located in the first area, and the GPS satellites transmit the signals of the first frequency band and For the signal of the second frequency band, the code rate of the signal of the second frequency band is greater than the code rate of the signal of the first frequency band.

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

The technical scheme of the present invention utilizes the positioning time slot of dual-frequency GNSS to combine two GNSS paths into one, so as to further improve the positioning accuracy while positioning quickly, and only one switch is added in the structure to realize the combination of the two paths. , which can reduce the manufacturing cost while ensuring the PCB layout.

Description of drawings

1 shows a schematic diagram of a dual radio frequency receiving path in the prior art;

FIG. 2 shows a schematic diagram 1 of a radio frequency receiving circuit according to an embodiment of the present invention;

3 is a schematic diagram showing the frequency response characteristic of a third filtering unit according to an embodiment of the present invention;

FIG. 4 shows a schematic diagram 2 of a radio frequency receiving circuit according to an embodiment of the present invention;

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

FIG. 6 shows a schematic diagram of the hardware structure of the real-time electronic device of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts 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:

The first switch 11 ; the signal processing device 2 connected to the first end of the first switch 11 , the signal processing device 2 is connected to the dual-frequency antenna 3 ; the first matching port 41 connected to the second end of the first switch 11 and the first Two matching ports 42, the first end of the first switch 11 is connected to the first matching port 41 or the second matching port 42; receiver 5, the first receiving port 51 of the receiver 5 is connected to the first matching port 41, the receiver 5 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; wherein, the receiver 5 controls the first switch 11 through the time slot control port 53 to communicate with the signal processing device 2 and The first matching port 41 , or controls the first switch 11 to communicate with the signal processing device 2 and the second matching port 42 .

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

The first end of the first switch 11 is connected to the signal processing device 2, and 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 at the same time It can only communicate with one of the ports, that is, the first switch 11 can communicate with the signal processing device 2 and the first matching port 41 or communicate with 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, the time slot control port 53 of the receiver 5 is connected to the first switch 11, It is used to control the first switch 11 to communicate with the signal processing device 2 and the first matching port 41 or communicate with the signal processing device 2 and the second matching port 42 .

When the time slot control port 53 controls the first switch 11 to connect the signal processing device 2 and the first matching port 41, the dual-frequency antenna 3, the signal processing device 2, the first switch 11, the first matching port 41 and the receiver 5 are connected; When the time slot control port 53 controls the first switch 11 to connect the signal processing device 2 and the second matching port 42 , the dual-frequency 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 the first frequency band, and the radio frequency signal received when the first switch 11 is connected to the signal processing device 2 and the second matching port 42 Corresponding to the second frequency band, the signal frequency of the second frequency band is lower than the signal frequency of the first frequency band, and the code rate of the signal of the second frequency band is greater than the code rate of the signal of the first frequency band. At the same time of fast positioning, the high bit rate can be used to improve the positioning accuracy.

In the above process, the first switch can be controlled by the time slot control port, and the two paths can be combined into one, which can reduce the manufacturing cost while ensuring the PCB layout. It can realize fast positioning and improve positioning accuracy.

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 time slot control port 53, the first receiving port 51 The signal of the first frequency band transmitted by the dual-frequency antenna 3 is received, and the receiver 5 is positioned to the 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 time slot control port 53, the dual-frequency antenna 3, the signal processing device 2, the first switch 11, the first matching port 41 and the receiving When the receiver 5 is connected, the receiver 5 can receive the signal of the first frequency band. After receiving the signal of the first frequency band, it can use the signal of the first frequency band to perform initial positioning to determine the first area and realize fast positioning.

By controlling the first switch to connect the signal processing device and the first matching port, and performing initial positioning according to the received signal of the first frequency band, the first area can be quickly positioned.

Optionally, in an embodiment of the present invention, as shown in FIG. 2 , after the receiver 5 is located in the first area according to the signal of the first frequency band, the time slot control port 53 is used for the first matching port 41 and the second matching port 41 . Port 42 performs slot allocation;

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

After the receiver 5 performs initial positioning according to the signal of the first frequency band, the time slot allocation can be performed for the first matching port 41 and the second matching port 42 through the time slot control port 53. The principle of time slot allocation is: in each unit During the time, the duration corresponding to the second matching port 42 is greater than the duration corresponding to the first matching port 41 . The unit time is in milliseconds.

Optionally, within the second time period, the receiver 5 controls the first switch 11 to connect the signal processing device 2 and the second matching port 42 through the time slot control port 53 , and the second receiving port 52 receives the second signal transmitted by the dual-frequency antenna 3 . The signal of the frequency band, the code rate of the signal of the second frequency band is greater than the code rate of the signal of the first frequency band, the receiver 5 is positioned to the second area according to the signal of the second frequency band, and the second area is located in the first area; Inside, the receiver 5 controls the first switch 11 to communicate with 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;

The GPS satellite transmits the signal of the first frequency band and the signal of the second frequency band.

During the second time period, the first switch 11 is connected to the signal processing device 2 and the second matching port 42. At this time, the receiver 5 receives the signal of the second frequency band through the second receiving port 52, and performs pilot frequency acquisition according to the high code rate. And perform multi-frequency operations to remove ionospheric factors, high bit rate to improve positioning accuracy and other operations, to achieve the determination of the second area located in the first area on the basis of the first area to ensure accurate positioning. The time required for the receiver 5 to perform pilot acquisition and operation through the second receiving port 52 and the second matching port 42 is relatively long, so it takes a relatively long time per unit time.

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

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

The first duration of 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 modes 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 multiple unit times, the distribution of the first duration and the second duration in each unit time can be adjusted, but it is necessary to ensure that the second duration is greater than the first duration. The process of initial positioning and precise positioning is described below with a specific example:

The time slot control port 53 will control the receiving time slots of the two different frequency bands of the GNSS. The time slot 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 is processed. Signal reception (such as receiving signals corresponding to the GPS L1 frequency band) to achieve fast positioning. After the positioning is realized, the time slot in the unit time of the receiving path corresponding to the first matching port 41 is reduced to 1/10, and only the GPS satellites are tracked, and the receiving path corresponding to the second matching port 42 (such as receiving GPS The signal corresponding to the L5 frequency band, the code rate of the signal is greater than the code rate of the signal in the GPS L1 frequency band) using the 9/10 time slot for pilot frequency capture, after the pilot frequency is captured, multi-frequency operations can be performed to remove ionospheric factors, high code rate to improve the positioning accuracy and other operations. That is, the second matching port 42 maintains a high positioning slot allocation in the later stage of positioning.

By using the traditional GNSS frequency band in the early stage of GNSS positioning, rapid positioning can be achieved. After positioning, most of the receiving time slots are allocated to the new GNSS frequency band, and the positioning comprehensive operation is performed after the high-bit rate pilot frequency is captured to improve the GNSS positioning accuracy. After multiple frequency bands are tracked, fast positioning and improved positioning accuracy can be achieved.

Optionally, in an embodiment of the present invention, the first matching port 41 is used to adjust the working area of the network function entity NF of the signal processing device 2 to the first frequency band, and the second matching port 42 is used to adjust the working area of the signal processing device 2 to the first frequency band. The NF working area is adjusted to the second frequency band.

The first matching port 41 can adjust the optimal NF (Network Function) working area of the signal processing device 2 to the first frequency band, such as the 1555MHz-1615MHz frequency band, which may include GPS L1 frequency band, Beidou B1 frequency band, GLO (Global Navigation Satellite System, global satellite navigation system) frequency band; the second matching port 42 can adjust the optimal NF working area of the signal processing device 2 to the second frequency band, such as 1170MHz～1210MHz, which can include GPSL5 frequency band and Beidou B2 frequency band.

The first matching port 41 can make the receiver 5 receive the signal of the first frequency band by adjusting the NF working area of the signal processing device 2 to the first frequency band, and the second matching port 42 can adjust the NF working area of the signal processing device 2 to the first frequency band. The second frequency band enables the receiver 5 to receive signals of the second frequency band.

Optionally, in an embodiment of the present invention, as shown in FIG. 2 , the radio frequency receiving circuit further includes:

The first filtering unit 61 is connected with the first receiving port 51 and the first matching port 41 , and the second filtering unit 62 is connected with the second receiving port 52 and the second matching port 42 .

By arranging the first filtering unit 61 between the first receiving port 51 and the first matching port 41, the signal of the first frequency band that has passed through the first matching port 41 can be filtered and then transmitted to the receiver 5. A second filtering unit 62 is arranged between the receiving port 52 and the second matching port 42 , and the signal of the second frequency band passing through the second matching port 42 can be filtered and then transmitted to the receiver 5 .

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

The third filter unit 21 connected to the dual-band antenna 3 and the low noise amplifier 22 connected to the third filter unit 21 are connected to the first end of the first switch 11 .

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

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

In the design of FIG. 2 , the third filtering unit 21 is a characteristic filter that simultaneously filters out the signal of the first frequency band and the signal of the second frequency band. When the first frequency band corresponds to GPS L1 and the second frequency band corresponds to GPS L5 , the frequency response characteristics can be expressed as shown in Figure 3. It can be seen from Figure 3 that for the L1\L5 frequency band, because the frequency band distance is short, the suppression requirements are high, and it is a filter with new requirements, so the design and production are more difficult.

Therefore, the embodiment of the present invention also provides another structure. As shown in FIG. 4 , the third filtering unit includes a first filter 211 and a second filter 212, and the radio frequency receiving circuit further includes: The second switch 12 between the three filtering units, and the third switch 13 disposed between the third filtering unit and the low noise amplifier 22; the time slot control port 53 of the receiver 5 and the second switch 12 and the third switch 13 connect.

The second switch 12 is arranged between the dual-band antenna 3 and the third filter unit, and is used to control the dual-band antenna 3 to communicate with the first filter 211 or the second filter 212. The third switch 13 is arranged between the third filter unit and the third filter unit. Between the low-noise amplifiers 22 , it is used to control the low-noise amplifier 22 to communicate with the first filter 211 or the second filter 212 . The time 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 the moving end, and the second end of the first switch 11 forms the first non-moving end and the The second stationary terminal, the first stationary terminal of the first switch 11 is connected to the first matching port 41 , the second stationary terminal of the first switch 11 is connected to the second matching port 42 , and the movable terminal of the first switch 11 is connected to the output of the low noise amplifier 22;

The movable end of the second switch 12 is connected to the dual-band antenna 3 , the first stationary end of the second switch 12 is connected to the input end of the first filter 211 , and the second stationary end of the second switch 12 is connected to the second filter the input of the device 212;

The moving terminal of the third switch 13 is connected to the input terminal of the low noise amplifier 22, the first fixed terminal of the third switch 13 is connected to the output terminal of the first filter 211, and the second fixed terminal of the third switch 13 is connected to the output terminal of the first filter 211. The output 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, including a moving terminal, a first non-moving terminal and a second non-moving terminal. The moving terminal of the first switch 11 is connected to the output terminal of the noise amplifier 22, the first fixed terminal is connected to the first matching port 41, the second fixed terminal is connected to the second matching port 42, and the moving terminal is connected to the first matching port 42. When the stationary end is connected, the signal is transmitted to the first receiving port 51 through the first matching port 41 , and when the moving end and the second stationary end are connected, 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, and the moving end and When the first stationary end is connected, the first filter 211 processes the signal transmitted by the dual-frequency antenna 3, and outputs the signal of the first frequency band. When the moving end and the second stationary end are connected, the second filter 212 The signal transmitted by the frequency antenna 3 is processed, and the signal of the second frequency band is output.

The moving terminal of the third switch 13 is connected to the input terminal of the low noise amplifier 22 , the first fixed terminal is connected to the output terminal of the first filter 211 , and the second fixed terminal is connected to the output terminal of the second filter 212 . When the moving end and the first stationary end are connected, the signal of the first frequency band processed by the first filter 211 is transmitted to the low noise amplifier 22; The processed signal of the second frequency band 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 time slot control port 53, the dual The frequency antenna 3, the first filter 211, the low noise amplifier 22, the first matching port 41 and the first receiving port 51 are connected to form a first receiving link;

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 second fixed ends through the time slot control port 53 , the dual-frequency antenna 3 , the second filter 212 , the low noise The amplifier 22, the second matching port 42 and the second receiving port 52 are connected to form a second receiving link.

The time slot control port 53 is connected to the first switch 11 , the second switch 12 and the third switch 13 , and can control the moving terminal and the first non-moving terminal or the second switch 11 of the first switch 11 , the second switch 12 and the third switch 13 . Fixed end connection. When the moving ends of the three switches are connected to the first fixed 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 connected to form a first receiving chain The receiver 5 receives the signal of the first frequency band through the first receiving link. When the moving ends of the three switches are connected to 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 connected to form a second receiving chain The receiver 5 receives the signal of the second frequency band through the second receiving link.

By adding two switches, the consistency of the state changes of the three switches during signal reception is realized, and only one time slot control port, namely GPIO (General Purpose Input Output, general input/output port), is used to complete the three switches control, so that the receiver does not affect each other when receiving signals of different frequency bands, and ensures that the low-noise amplifier does not appear power saturation.

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

After locating 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 the first duration, the second receiving link corresponds to the second duration, and the second duration is greater than the first duration;

The first receiving link is connected within the first duration, and the receiver 5 tracks the GPS satellites according to the signal of the first frequency band transmitted by the first receiving link; and the second receiving link is connected within the second duration, and the receiver 5 is connected according to the The signal of the second frequency band transmitted by the second receiving link is located in the 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, the code of the signal of the second frequency band The rate is greater than the code rate of the signal in 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 to determine the first area according to the signal of the first frequency band. After the first area is determined, time slot allocation is performed for the first receiving link and the second receiving link through the time slot control port 53, specifically:

In each unit time, the first receiving link is controlled to correspond to a first duration, and the second receiving link is controlled to correspond to a second duration, wherein the second duration is greater than the first duration.

During the second period of time, the second receiving link is connected, and the receiver 5 receives the signal of the second frequency band transmitted by the dual-frequency antenna 3 through the second receiving link. Since the code rate of the signal of the second frequency band is greater than that of the signal of the first frequency band The code rate can be accurately positioned 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 period of time, 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.

The above is the implementation process of the radio frequency receiving circuit according to the embodiment of the present invention. Using the positioning time slot of dual-frequency GNSS and the wide frequency band of the low noise amplifier, two GNSS paths are combined into one, and multiple GNSS paths are realized through one radio frequency path. The reception of frequency bands utilizes the positioning characteristics of different frequency bands to achieve fast positioning and high-precision tracking at low cost, and also saves the PCB layout area.

By utilizing the consistency of the state changes of the three switches during signal reception, only one time slot control port is used to complete the control of the three switches, so that the receiver does not affect 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 above-mentioned radio frequency receiving circuit, as shown in FIG. 5 , including:

Step 501: Under the condition of controlling the first switch to connect the signal processing device and the first matching port, receive the signal of the first frequency band transmitted by the dual-band antenna.

Step 502: Under the condition that the first switch is controlled to connect the signal processing device and the second matching port, the signal of the second frequency band transmitted by the dual-band antenna is received.

The signals of the first frequency band are used to locate the first area or track GPS satellites, the signals of the second frequency band are used to locate to the second area, the second area is located in the first area, and the GPS satellites transmit the signals of the first frequency band and For the signal of the second frequency band, the code rate of the signal of the second frequency band is greater than the code rate of the signal of the first frequency band.

When the receiver controls the first switch to connect the signal processing device and the first matching port through the time slot control port, it can receive the signal of the first frequency band transmitted by the dual-frequency antenna, and controls the first switch to connect the signal processing through the time slot control port. When the device is connected to the second matching port, the signal of the 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 performed to determine the first area, or GPS satellite tracking can be performed according to the signal of the first frequency band, and after receiving the signal of the second frequency band, a high bit rate can be used for accurate Positioning to determine a second area with a smaller range on the basis of the first area.

Optionally, receive signals of the first frequency band transmitted by the dual-band antenna, including:

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

After locating to the first area and assigning time slots to 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 duration of each unit time, and the signal of the first frequency band is received according to the first frequency band The signal tracks the position of GPS satellites;

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

Receiving the signal of the first frequency band corresponds to two processes. Before initial positioning, the signal of the first frequency band is received through the first receiving port, and the first area is determined by initial positioning according to the signal of the first frequency band. After the initial positioning is completed and the time slot is allocated for 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 duration of the unit time, and according to the received first Signals in the frequency band track the position of GPS satellites.

Optionally, receive signals of the second frequency band transmitted by the dual-band antenna, including:

After locating to the first area and assigning time slots to the first matching port and the second matching port through the time slot control port, within the second duration of each unit time, the second receiving port receives the The signal of the second frequency band processed by the signal processing device; and the second area is located according to the signal of the second frequency band.

To receive the signal of the second frequency band, after initial positioning, after determining the first area and assigning time slots to the first matching port and the second matching port through the time slot control port, within the second duration of each unit time, The signal of the second frequency band is received through the second receiving port, and precise positioning is performed according to the signal of the second frequency band, so as to determine the second area with a smaller range on the basis of the first area.

The signal processing device includes: a third filter unit connected to the dual-frequency antenna, and a low-noise amplifier connected to the third filter unit, the low-noise amplifier is connected to the first switch, and the third filter unit includes a first filter and a third filter unit. Two filters; the radio frequency receiving circuit further includes: a second switch connecting the dual-frequency antenna and the first filter or connecting the dual-frequency antenna and the second filter, and connecting the low-noise amplifier and the first filter or connecting the low-noise amplifier and the The third switch of the second filter, the first switch, the second switch and the third switch are all connected to the time slot control port;

Receive the signal of the first frequency band transmitted by the dual-band antenna, including:

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

Wherein, 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, the first switch can be controlled to connect the low-noise amplifier with the first matching port, the first matching port, the second The second switch connects the dual-band antenna and the first filter, the third switch connects the low-noise amplifier and the first filter, and then receives the data transmitted by the dual-band antenna, and sequentially passes through the first filter, the low-noise amplifier, the first matching port and the The signal of the first frequency band of the first receiving port.

Optionally, receive signals of the second frequency band transmitted by the dual-band antenna, including:

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

Wherein, 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 first switch can be controlled to connect to the low noise amplifier and the second matching port, and the second switch to connect the dual-frequency antenna and the The second filter and the third switch are connected to the low noise amplifier and the second filter, and then receive the data transmitted by the dual-band antenna, and pass through the second filter, the low noise amplifier, the second matching port and the second receiving port in sequence. frequency band signal.

The signal receiving method of the present invention utilizes the positioning time slot of dual-frequency GNSS and the characteristics of the wide frequency band of the low-noise amplifier, combines two GNSS paths into one, realizes the reception of multiple GNSS frequency bands through one radio frequency path, and utilizes different frequency bands. The positioning characteristics of the device realize fast positioning and high-precision tracking at low cost, and also save the PCB layout area.

By utilizing the consistency of the state changes of the three switches during signal reception, only one time slot control port is used to complete the control of the three switches, so that the receiver does not affect each other when receiving signals of different frequency bands.

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 implementing various embodiments of the present invention. The electronic device 600 includes but is not limited to: a radio frequency unit 601, a network module 602, and 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 and other components. The radio frequency unit 601 includes the above-mentioned radio frequency receiving circuit.

The radio frequency receiving circuit includes: a first switch; a signal processing device connected to the first end of the first switch, the signal processing device is connected to the dual-frequency antenna; a first matching port and a second matching port connected to the second end of the first switch port, the first end of the first switch is connected to the first matching port or the second matching port; receiver, the first receiving port of the receiver is connected to the first matching port, and the second receiving port of the receiver is connected to the second matching port, The time slot control port of the receiver is connected to the first switch; wherein the receiver controls the first switch to connect the signal processing device and the first matching port through the time slot control port, or controls the first switch to connect 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 the signal of the first frequency band transmitted by the dual-frequency antenna, and the receiver receives the signal of the first frequency band according to the signal of the first frequency band. Locate to the first area.

Optionally, after the receiver locates the first area according to the signal of the first frequency band, the 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 the first duration, the second matching port corresponds to the second duration, and the second duration is greater than the first duration.

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

Within the first duration, the receiver controls the first switch to connect the signal processing device and the first matching port through the time slot control port, and the receiver tracks the position of the GPS satellite according to the signal of the first frequency band;

The GPS satellite transmits the signal of the first frequency band and the signal of the second frequency band.

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

Optionally, the radio frequency receiving circuit further includes:

A first filtering unit connected to the first receiving port and the first matching port, and a second filtering unit connecting the second receiving port and the second matching port.

Optionally, the signal processing device includes:

A third filter unit connected to the dual-band antenna, and a low noise amplifier connected to the third filter unit, the low noise amplifier is connected to the first end of the first switch.

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

Optionally, the radio frequency receiving circuit further includes: a second switch arranged between the dual-frequency antenna and the third filter unit, and a third switch arranged between the third filter unit and the low noise amplifier; the time slot of the receiver The control port is connected with 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 the moving end, and the second end of the first switch forms the first non-moving end and the second non-moving end. a moving terminal, the first fixed terminal of the first switch is connected to the first matching port, the second fixed terminal of the first switch is connected to the second matching port, and the moving terminal of the first switch is connected to the output terminal of the low noise amplifier; The movable end of the second switch is connected to the dual-band antenna, the first stationary end of the second switch is connected to the input end of the first filter, and the second stationary end of the second switch is connected to the input end of the second filter; The moving terminal of the third switch is connected to the input terminal of the low noise amplifier, the first fixed terminal of the third switch is connected to the output terminal of the first filter, and the second fixed terminal of the third switch is connected to the output terminal of the second filter. output.

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

When the receiver controls the moving ends of the first switch, the second switch and the third switch to be connected to the second fixed ends through the time slot control port, the dual-frequency antenna, the second filter, the low noise amplifier, the second matching port and the The second receiving port is connected to form a second receiving link.

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

After locating to the first area, the receiver performs time slot allocation for the first receiving link and the second receiving link through the time slot control port;

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

The first receiving link is connected within the first duration, 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 connected within the second duration, and the receiver is based on the The signal of the second frequency band transmitted by the second receiving link is located in the 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 The code rate of the signal greater than the first frequency band.

Those skilled in the art can understand that the structure of the electronic device shown in FIG. 6 does not constitute a limitation on the electronic device, and the electronic device may include more or less components than the one shown, or combine some components, or different components layout. In this embodiment of the present invention, the electronic device includes but is not limited to a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

Wherein, the radio frequency unit 601 is used for: in the case of controlling the first switch to connect the signal processing device and the first matching port, to receive the signal of the first frequency band transmitted by the dual-frequency antenna; when controlling the first switch to connect the signal processing device and the second In the case of matching ports, receive the signal of the second frequency band transmitted by the dual-band antenna;

The signals of the first frequency band are used to locate the first area or track GPS satellites, the signals of the second frequency band are used to locate to the second area, the second area is located in the first area, and the GPS satellites transmit the signals of the first frequency band and For the signal of the second frequency band, the code rate of the signal of the second frequency band is greater than the code rate of the signal of the first frequency band.

Optionally, when receiving the signal of the first frequency band transmitted by the dual-frequency antenna, the radio frequency unit 601 is further configured to: receive the signal of the first frequency band transmitted by the dual-frequency antenna and processed by the signal processing device through the first receiving port; The device 610 is used for: locating to the first area according to the signal of the first frequency band; the radio frequency unit 601 is further used for: assigning time slots to the first matching port and the second matching port through the time slot control port when the radio frequency unit 601 is positioned to the first area Then, within the first duration of each unit time, receive the signal of the first frequency band, and track the position of the GPS satellite according to the signal of the first frequency band;

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

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

After locating to the first area and assigning time slots to the first matching port and the second matching port through the time slot control port, within the second duration of each unit time, the second receiving port receives the The signal of the second frequency band processed by the signal processing device; the processor 610 is further configured to: locate to the second area according to the signal of the second frequency band.

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

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

Wherein, 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.

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

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

Wherein, 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.

In this way, using the positioning time slot of dual-frequency GNSS and the wide frequency band of the low noise amplifier, the two GNSS channels are combined into one, and the reception of multiple GNSS frequency bands is realized through one radio frequency channel, and the positioning characteristics of different frequency bands are used to realize Fast positioning and high-precision tracking at low cost, and also saves PCB layout area.

By utilizing the consistency of the state changes of the three switches during signal reception, only one time slot control port is used to complete the control of the three switches, so that the receiver does not affect each other when receiving signals of different frequency bands.

It should be understood that, in this embodiment of the present invention, the radio frequency unit 601 may be used for receiving and sending signals during sending and receiving of information or during a call. Specifically, after receiving the downlink data from the base station, it is processed by the processor 610; The uplink data is sent to the base station. Generally, the 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. In addition, the radio frequency unit 601 can also communicate with the network and other devices through a wireless communication system.

The electronic device provides the user with wireless broadband Internet access through the network module 602, such as helping the user to send and receive emails, browse web pages, access streaming media, and the like.

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 audio signals and output as sound. Also, the audio output unit 603 may also provide audio output related to a specific function performed by the electronic device 600 (eg, call signal reception sound, 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 processor (Graphics Processing Unit, GPU) 6041 and a microphone 6042, and the graphics processor 6041 captures images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode data is processed. The processed image frames may be displayed on the display unit 606 . The image frames processed by the graphics 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 can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 601 for output in the case of a telephone call mode.

The electronic device 600 also includes at least one sensor 605, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 6061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 6061 and the display panel 6061 when the electronic device 600 is moved to the ear. / or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (usually three axes), and can detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of electronic devices (such as horizontal and vertical screen switching, related games , magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; the sensor 605 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, Infrared sensors, etc., are not repeated here.

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 in the form of 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 numerical or character information, and generate key signal input related to user setting and function control of the electronic device. Specifically, the user input unit 607 includes a touch panel 6071 and other input devices 6072 . The touch panel 6071, also referred to as a touch screen, can collect the user's touch operations on or near it (such as the user's finger, stylus, etc., any suitable object or accessory on or near the touch panel 6071). operate). The touch panel 6071 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the touch controller. To the processor 610, the command sent by the processor 610 is received and executed. In addition, the touch panel 6071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch panel 6071 , the user input unit 607 may also include other input devices 6072 . Specifically, other input devices 6072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which are not described herein again.

Further, the touch panel 6071 can be covered on the display panel 6061. When the touch panel 6071 detects a touch operation on or near it, it transmits it to the processor 610 to determine the type of the touch event, and then the processor 610 determines the type of the touch event according to the touch The type of event provides a corresponding visual output on the display panel 6061. Although in FIG. 6 , the touch panel 6071 and the display panel 6061 are used as two independent components to realize the input and output functions of the electronic device, but in some embodiments, the touch panel 6071 and the display panel 6061 may be integrated The implementation of the input and output functions of the electronic device is not specifically limited here.

The interface unit 608 is an interface for connecting an external device to the electronic device 600 . For example, external devices may include wired or wireless headset ports, external power (or battery charger) ports, wired or wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input/output (I/O) ports, video I/O ports, headphone ports, and more. The interface unit 608 may be used to receive input (eg, 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 between the electronic device 600 and external Transfer data between devices.

The memory 609 may be used to store software programs as well as various data. The memory 609 may mainly include a stored program area and a stored data area, wherein the stored program area may store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data created by the use of the mobile phone (such as audio data, phone book, etc.), etc. Additionally, 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 the control center of the electronic device, using various interfaces and lines to connect various parts of the entire electronic device, by running or executing the software programs and/or modules stored in the memory 609, and calling the data stored in the memory 609. , perform various functions of electronic equipment and process data, so as to monitor electronic equipment as a whole. The processor 610 may include one or more processing units; preferably, the processor 610 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem The processor mainly handles wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 610.

The electronic device 600 may also include a power supply 611 (such as a battery) for supplying power to various components. Preferably, the power supply 611 may be logically connected to the processor 610 through a power management system, so as to manage charging, discharging, and power consumption management through the power management system and other functions.

In addition, the electronic device 600 includes some functional modules not shown, which will not be repeated here.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

From the description of the above embodiments, those skilled in the art can clearly understand that the method of the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present invention.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (18)

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);

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, 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:

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 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.

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