CN117713860A

CN117713860A - Main diversity receiving system and control method

Info

Publication number: CN117713860A
Application number: CN202211088205.0A
Authority: CN
Inventors: 张远龙; 冷鹏
Original assignee: Hytera Communications Corp Ltd
Current assignee: Hytera Communications Corp Ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2024-03-15

Abstract

The application discloses a main diversity receiving system and a control method, wherein the system comprises: a radio frequency front end, a transceiver and a baseband processor; the radio frequency front end is used for receiving radio frequency signals and responding to control instructions sent by the baseband processor to switch the main set receiving path to a target attenuation path; a transceiver for converting the radio frequency signal into an analog signal and transmitting to the baseband processor; and the baseband processor is used for processing the analog signals, determining a main diversity combining signal-to-noise ratio, determining a target attenuation path when the main diversity combining signal-to-noise ratio is smaller than a set signal-to-noise ratio threshold value, and sending out a control instruction corresponding to the target attenuation path. According to the main diversity receiving system, the main diversity signal receiving balance is maintained by properly reducing the main diversity receiving performance of the radio frequency front end, so that the signal to noise ratio of main diversity combination is improved under the condition of weak signal coverage, the downlink rate is improved, and the user experience is improved.

Description

Main diversity receiving system and control method

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a main diversity receiving system and a control method.

Background

In the current multimode terminal, a broadband cellular is a built-in antenna and is divided into a main set transceiver antenna and a diversity receiving antenna. From the aspects of antenna, structure and radio frequency layout, the main set of antennas are arranged at the bottom of the terminal, and the diversity antennas are arranged at the top of the terminal. Due to the characteristics and structural stacking factors of the multimode terminal, the efficiency of the low frequency band (729-960 MHz) of the broadband cellular internal antenna is lower, and particularly the diversity antenna placed on the top of the terminal is lower. The broadband private network frequency band of the multimode terminal is usually deployed by adopting a low frequency band, the main and diversity conduction sensitivity is optimized to the limit, the efficiency of the diversity built-in antenna is low, so that the low frequency band diversity reception is about 4dB less than the main set reception on the total omnidirectional sensitivity (Total Isotropic Sensitivity, TIS), and when the terminal is under the coverage of medium and weak signals, the main set and diversity reception are unbalanced, and finally the downlink throughput rate is rapidly reduced.

In order to obtain the stability of the downlink rate under various signal coverage conditions, the prior art generally adopts a method for improving the receiving performance of the main diversity radio frequency, however, in the method, the receiving imbalance of the main set and the diversity of the whole machine (main set TIS > diversity TIS) still exists, under the condition of better signal coverage, the downlink rate can be maintained at a higher level, but under the condition of weak signal coverage, the existence of the imbalance of the main diversity and the diversity receiving can cause the signal-to-noise ratio of the main diversity combination to be rapidly deteriorated, so that the downlink throughput rate is rapidly deteriorated.

Disclosure of Invention

The application provides a main diversity receiving system and a control method, which are used for maintaining a better main diversity combining signal-to-noise ratio under the condition of weak signal coverage and improving the downlink rate.

According to an aspect of the present application, there is provided a primary diversity reception system including: a radio frequency front end, a transceiver and a baseband processor;

the radio frequency front end is used for receiving radio frequency signals and responding to a control instruction sent by the baseband processor to switch a main set receiving path to a target attenuation path;

the transceiver is used for converting the radio frequency signals into analog signals and sending the analog signals to the baseband processor;

the baseband processor is used for processing the analog signals and determining a main diversity combining signal-to-noise ratio, and when the main diversity combining signal-to-noise ratio is smaller than a set signal-to-noise ratio threshold, the target attenuation path is determined and the control instruction corresponding to the target attenuation path is sent out.

Optionally, the radio frequency front end includes: a main set receiving module and a diversity receiving module,

the main set receiving module comprises a radio frequency path switching unit, a target attenuation path and a baseband processor, wherein the radio frequency path switching unit is used for receiving a main set radio frequency signal and responding to the control instruction sent by the baseband processor, and switching the main set receiving path to the target attenuation path through the radio frequency path switching unit;

the diversity receiving module is used for receiving diversity radio frequency signals.

Optionally, the main set receiving path includes a normal path and at least one attenuation path, the receiving power of each attenuation path is smaller than the receiving power of the normal path, and the receiving powers corresponding to the attenuation paths are different,

and when the radio frequency path switching unit switches the main set receiving path to the target attenuation path, the main set receiving module receives the main set radio frequency signal with the receiving power corresponding to the target attenuation path.

Optionally, the baseband processor includes: a communication service processing module is provided for processing the communication service,

the communication service processing module is configured to determine the primary diversity combining signal-to-noise ratio, and send a primary set receiving path switching instruction when the primary diversity combining signal-to-noise ratio is less than the set signal-to-noise ratio threshold, so as to control the radio frequency path switching unit to execute primary set receiving path switching operation, and switch the primary set receiving path to each attenuation path in turn;

the communication service processing module is further configured to obtain a primary diversity combining signal-to-noise ratio corresponding to each attenuation path after the radio frequency path switching unit performs a primary set receiving path switching operation, determine an attenuation path corresponding to a maximum value of the primary diversity combining signal-to-noise ratio as the target attenuation path, and send out the control instruction corresponding to the target attenuation path.

Optionally, the baseband processor further includes: analog to digital conversion modules, modems and air interfaces,

the analog-to-digital conversion module is used for converting the analog signal into a digital signal;

the modem is configured to demodulate the digital signal, obtain a main set signal and a diversity signal, and send the main set signal and the diversity signal to the communication service processing module and the air interface;

the air interface is configured to identify a main set reference signal received power and a diversity reference signal received power according to the main set signal and the diversity signal, and send the main set reference signal received power and the diversity reference signal received power to the communication service processing module.

According to another aspect of the present application, there is provided a control method of a primary diversity reception system, including:

the radio frequency front end sends the received radio frequency signals to the transceiver;

the transceiver converts the radio frequency signal into an analog signal and sends the analog signal to a baseband processor;

the baseband processor processes the analog signals, determines a main diversity combining signal-to-noise ratio, determines a target attenuation path when the main diversity combining signal-to-noise ratio is smaller than a set signal-to-noise ratio threshold, and sends out a control instruction corresponding to the target attenuation path;

and the radio frequency front end responds to the control instruction sent by the baseband processor and switches a main set receiving path to the target attenuation path.

Further, the radio frequency signals include a main set radio frequency signal and a diversity radio frequency signal; the main set receiving path comprises a normal path and at least one attenuation path, the receiving power of each attenuation path is smaller than that of the normal path, and the receiving power corresponding to each attenuation path is different;

and after the radio frequency front end switches the main set receiving path to the target attenuation path, the radio frequency front end receives the main set radio frequency signal with the receiving power corresponding to the target attenuation path.

Further, the baseband processor includes a communication service processing module, the radio frequency front end includes a radio frequency path switching unit, the determining a primary diversity combining signal-to-noise ratio, determining a target attenuation path and sending a control instruction corresponding to the target attenuation path when the primary diversity combining signal-to-noise ratio is smaller than a set signal-to-noise ratio threshold, and includes:

the communication service processing module determines the primary diversity combining signal-to-noise ratio, and when the primary diversity combining signal-to-noise ratio is smaller than the set signal-to-noise ratio threshold, sends a primary set receiving path switching instruction to control the radio frequency path switching unit to execute primary set receiving path switching operation, and sequentially switches the primary set receiving path to each attenuation path;

after the radio frequency path switching unit executes the main set receiving path switching operation, the communication service processing module obtains a main diversity combining signal-to-noise ratio corresponding to each attenuation path, determines the attenuation path corresponding to the maximum value of the main diversity combining signal-to-noise ratio as the target attenuation path, and sends out the control instruction corresponding to the target attenuation path.

Further, the baseband processor includes: the analog-to-digital conversion module, the modem and the air interface, the baseband processor processes the analog signal, including:

the analog-to-digital conversion module converts the analog signal into a digital signal;

the modem demodulates the digital signal to obtain a main set signal and a diversity signal and sends the main set signal and the diversity signal to the communication service processing module and the air interface;

the air interface respectively identifies a main set reference signal received power and a diversity reference signal received power according to the main set signal and the diversity signal, and sends the main set reference signal received power and the diversity reference signal received power to the communication service processing module.

Further, the communication service processing module determines the primary diversity combining signal-to-noise ratio, and when the primary diversity combining signal-to-noise ratio is smaller than the set signal-to-noise ratio threshold, sends a primary set receiving path switching instruction, including:

the communication service processing module determines a main set signal-to-noise ratio and a diversity signal-to-noise ratio according to the main set signal and the diversity signal;

determining the primary diversity combining signal-to-noise ratio according to the primary set signal-to-noise ratio and the diversity signal-to-noise ratio;

and under the condition that the received power of the main set reference signal and the received power of the diversity reference signal are smaller than corresponding power thresholds, if the signal to noise ratio of the main diversity combination is smaller than the set signal to noise ratio threshold, transmitting the main set received path switching instruction to the radio frequency front end.

The application discloses a main diversity receiving system, comprising: a radio frequency front end, a transceiver and a baseband processor; the radio frequency front end is used for receiving radio frequency signals and responding to control instructions sent by the baseband processor to switch the main set receiving path to a target attenuation path; a transceiver for converting the radio frequency signal into an analog signal and transmitting to the baseband processor; and the baseband processor is used for processing the analog signals, determining a main diversity combining signal-to-noise ratio, determining a target attenuation path when the main diversity combining signal-to-noise ratio is smaller than a set signal-to-noise ratio threshold value, and sending out a control instruction corresponding to the target attenuation path. According to the main diversity receiving system, the main diversity signal receiving balance is maintained by properly reducing the main diversity receiving performance of the radio frequency front end, so that the signal to noise ratio of main diversity combination is improved under the condition of weak signal coverage, the downlink rate is improved, and the user experience is improved.

It should be understood that the description of this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a primary diversity receiving system according to a first embodiment of the present application;

fig. 2 is a schematic structural diagram of another primary diversity receiving system according to a first embodiment of the present application;

fig. 3 is a flowchart of a control method of a primary diversity receiving system according to a second embodiment of the present application;

fig. 4 is a schematic diagram of a control procedure of a primary diversity receiving system according to a second embodiment of the present application.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

Fig. 1 is a schematic structural diagram of a primary diversity receiving system according to an embodiment of the present application, where the embodiment is applicable to a situation of improving a primary diversity combining signal-to-noise ratio and a downlink rate when a weak signal is covered, the system may implement a control method of the primary diversity receiving system, and the system may be implemented in a form of hardware and/or software, and the system may be configured in an electronic device. As shown in fig. 1, the system includes: a radio frequency front end 110, a transceiver 120, and a baseband processor 130.

The rf front-end 110 is a receiving end of an rf signal, the transceiver 120 is a collection of devices for receiving and transmitting a radio signal, and the baseband processor 130 is a component responsible for data processing and storage.

The rf front end 110 is configured to receive the rf signal and switch the main set receive path to the target attenuation path in response to a control instruction sent by the baseband processor 130.

The target attenuation path is a main set receiving path with main set receiving power smaller than that of a normal path.

In this embodiment, under normal conditions, the rf front end 110 receives the main set and diversity signals through the normal path and transmits them to the transceiver 120; in some cases, for example, when the signal-to-noise ratio of the main diversity combining is low, in order to reduce the difference of the main diversity signal reception, the main set signal reception performance may be appropriately reduced, that is, the main set reception path is switched to the target attenuation path. Wherein the switching operation of the main set reception path is controlled by the baseband processor 130 transmitting a control instruction.

Referring to fig. 2, fig. 2 is a schematic structural diagram of another main diversity receiving system according to an embodiment of the present application, as shown in the drawing, a radio frequency front end 110 includes: the main set receiving module 111 and the diversity receiving module 112, the main set receiving module 111 includes a radio frequency path switching unit 1111 for receiving the main set radio frequency signal, and switching the main set receiving path to the target attenuation path through the radio frequency path switching unit 1111 in response to a control instruction sent by the baseband processor 130.

Diversity receive module 112 for receiving diversity radio frequency signals.

In this embodiment, the rf front end 110 may receive the main set rf signal and the diversity rf signal through the main set receiving module 111 and the diversity receiving module 112, respectively. The main set receiving module 111 includes a radio frequency path switching unit 1111, and when the main set receiving module 111 receives a control instruction sent by the baseband processor 130, the radio frequency path switching unit 1111 may be used to perform an operation of switching the main set receiving path to the target attenuation path.

Optionally, the main set receiving path includes a normal path and at least one attenuation path, where the received power of each attenuation path is smaller than the received power of the normal path, and the received powers corresponding to the attenuation paths are different, and when the radio frequency path switching unit 1111 switches the main set receiving path to the target attenuation path, the main set receiving module 111 receives the main set radio frequency signal with the received power corresponding to the target attenuation path.

In this embodiment, because of imbalance between the reception of the primary set signal and the diversity signal, the downlink rate can be maintained at a higher level under the condition of better signal coverage, and the signal reception imbalance of the primary diversity can cause rapid degradation of the primary diversity combining signal-to-noise ratio under the condition of weak signal coverage, thereby rapidly degrading the downlink rate. Thus, in order to maintain the balance of reception of the main set signal and diversity signal in the case of weak signal coverage, one or more attenuation paths having a lower received power than the normal path may be provided on the main set reception path outside the normal path. The rf path switching unit 1111 may perform switching of the main set reception path in response to a control instruction sent by the baseband processor 130, where the control instruction includes a target attenuation path to be switched.

Specifically, a plurality of attenuation paths may be provided, where the received power of each attenuation path decreases in sequence, i.e. each attenuation path corresponds to a decrease in the received power of the main set radio frequency signal with different degrees. Preferably, the received power of each attenuation path is equally decreasing. For example, five attenuation paths may be provided, namely, an attenuation path 1, an attenuation path 2, an attenuation path 3, an attenuation path 4, and an attenuation path 5, where the main set signal receiving power of the attenuation path 1 is reduced by 1dB, the main set signal receiving power of the attenuation path 2 is reduced by 2dB, the main set signal receiving power of the attenuation path 3 is reduced by 3dB, the main set signal receiving power of the attenuation path 4 is reduced by 4dB, and the main set signal receiving power of the attenuation path 5 is reduced by 5dB, compared with the normal path.

Specifically, the transceiver 120 is configured to convert the radio frequency signal into an analog signal and send the analog signal to the baseband processor 130.

In this embodiment, the rf front-end 110 transmits the received rf signal to the transceiver 120, and the transceiver 120 may convert the rf signal to an analog signal. The analog signal may be an IQ signal, i.e., an In-Phase Quadrature signal, I represents In-Phase, Q represents Quadrature (Phase shifted by 90 degrees), and represents two signals with 90 degrees Phase difference. After transceiver 120 converts the radio frequency signal to an analog signal, the analog signal may be sent to baseband processor 130.

The baseband processor 130 is configured to process the analog signal, determine a primary diversity combining signal-to-noise ratio, determine a target attenuation path when the primary diversity combining signal-to-noise ratio is less than a set signal-to-noise ratio threshold, and send out a control command corresponding to the target attenuation path.

In this embodiment, the baseband processor 130 processes the analog signal, calculates the primary diversity combining snr according to the analog signal, and if the primary diversity combining snr is smaller than the set snr threshold, a control instruction may be sent to the rf front end 110 to cause the rf front end 110 to perform an operation of switching the primary diversity signal receiving path to the target attenuation path in order to avoid degradation of the downlink rate.

Optionally, the baseband processor 130 includes: the communication traffic processing module 131.

The communication service processing module 131 is configured to determine a primary diversity combining signal-to-noise ratio, and send a primary set receiving path switching instruction when the primary diversity combining signal-to-noise ratio is less than a set signal-to-noise ratio threshold, so as to control the radio frequency path switching unit 1111 to perform a primary set receiving path switching operation, and sequentially switch the primary set receiving path to each attenuation path; the communication service processing module 131 is further configured to obtain a primary diversity combining signal-to-noise ratio corresponding to each attenuation path after the radio frequency path switching unit 1111 performs the primary set receiving path switching operation, and determine the attenuation path corresponding to the maximum value of the primary diversity combining signal-to-noise ratio as the target attenuation path; and issues a control command corresponding to the target attenuation path.

In this embodiment, the decision of the control instruction may be performed by the communication service processing module 131, and the communication service processing module 131 may determine a primary diversity combining signal-to-noise ratio, and control the radio frequency path switching unit 1111 in the radio frequency front end 110 to sequentially switch the primary set of receiving paths to each attenuation path when the primary diversity combining signal-to-noise ratio is less than a set signal-to-noise ratio threshold. Meanwhile, the communication service processing module 131 may track the change situation of the primary diversity combining signal-to-noise ratio after each switching of the radio frequency path switching unit 1111, that is, obtain the value of the corresponding primary diversity combining signal-to-noise ratio after the radio frequency path switching unit 1111 switches the primary set receiving path to each attenuation path. After traversing each attenuation path corresponding to the rf front-end 110, the communication service processing module 131 may acquire the attenuation path corresponding to the best primary diversity combining signal-to-noise ratio therein and determine the attenuation path as a target attenuation path, that is, determine the attenuation path corresponding to the maximum value of each primary diversity combining signal-to-noise ratio as the target attenuation path, and then send a corresponding control instruction to the rf front-end 110.

Optionally, the manner of switching the main set receiving path to each attenuation path may be that a variable attenuator is set on the normal path, and attenuation values of the variable attenuator may be adjusted, so that different attenuation values correspond to different attenuation paths, at this time, the main set receiving path switching instruction and the control instruction correspond to attenuation values of the variable attenuator respectively, and the attenuation values of the variable attenuator are changed by the main set receiving path switching instruction and the control instruction; the single-pole multi-throw switch can be combined with a plurality of attenuators to form a plurality of attenuation paths, the attenuation value of each attenuator is fixed, the attenuation values of the attenuators are different, and at the moment, the main set receives path switching instructions and control instructions which are respectively corresponding to control signals of the single-pole multi-throw switch and are used for controlling the single-pole multi-throw switch to be communicated with one of the attenuators.

Optionally, the baseband processor 130 further includes: analog to digital conversion module 132, modem 133 and air interface 134,

the analog-to-digital conversion module 132 is configured to convert the analog signal into a digital signal.

A modem 133 for demodulating the digital signal, obtaining the main set signal and the diversity signal, and transmitting them to the communication service processing module 131 and the air interface 134.

An air interface 134 for identifying a main set reference signal received power and a diversity reference signal received power from the main set signal and the diversity signal, respectively, and transmitting the main set reference signal received power and the diversity reference signal received power to the communication service processing module 131.

In this embodiment, the analog-to-digital conversion module 132 may receive the analog signal sent by the transceiver 120, and convert the analog signal into a digital signal, and transmit the digital signal to the next-stage modem 133 for demodulation; the modem 133 demodulates the main set signal and the diversity signal according to the digital signal and then transmits them to the communication service processing module 131 and the air interface 134; the air interface 134 can respectively identify the main set reference signal receiving power and the diversity reference signal receiving power according to the main set signal and the diversity signal, and also send the main set reference signal receiving power and the diversity reference signal receiving power to the communication service processing module 131, and the communication service processing module 131, the modem 133 and the air interface 134 cooperate and coordinate with each other, and finally, the communication service processing module 131 determines a target attenuation path and generates a corresponding control instruction.

Optionally, the communication service processing module 131 is specifically configured to:

acquiring a main set signal and a diversity signal transmitted by the modem 133, and respectively identifying a main set signal-to-noise ratio and a diversity signal-to-noise ratio according to the main set signal and the diversity signal; acquiring the received power of the main set reference signal and the received power of the diversity reference signal transmitted by the air interface 134, and determining a main diversity combined signal-to-noise ratio according to the signal-to-noise ratio of the main set and the signal-to-noise ratio of the diversity; and if the primary diversity combining signal-to-noise ratio is smaller than the set signal-to-noise ratio threshold, transmitting a primary set receiving path switching instruction to the radio frequency front end 110.

In this embodiment, the communication service processing module 131 may make a control decision according to the main set signal and the diversity signal sent by the modem 133 and the main set reference signal receiving power and the diversity reference signal receiving power sent by the air interface 134, and when the main set reference signal receiving power and the diversity reference signal receiving power are both poor and the main diversity combining signal to noise ratio is low, control the radio frequency front end 110 to switch the main set receiving path, reduce the receiving capability of the main set radio frequency signal, and maintain the balance of the main diversity radio frequency signal receiving. Preferably, the communication service processing module 131 makes a control decision, sends a control instruction to the modem 133, and then the modem 133 sends the control instruction to the main set receiving module 111 in the radio frequency front end 110 through the processor interface 135, so that it completes the operation of main set receiving path switching by using the radio frequency path switching unit 1111.

Optionally, the baseband processor 130 is further configured to:

the acquiring radio frequency front end 110 performs the operation of switching the main set receiving path to the target attenuation path, and then reports the channel quality indication information to the base station.

In this embodiment, after determining the target attenuation path and controlling the rf front end 110 to complete the switching of the primary set reception path, the communication service processing module 131 may map the corresponding channel quality indication information (CQI) according to the optimal primary diversity combining snr corresponding to the target attenuation path, and report the CQI to the base station through the air interface 134.

Referring again to fig. 2, a specific operation principle of the main diversity receiving system in fig. 2 will be described. Baseband processor 130 includes a traffic processing module 131, an analog-to-digital conversion module 132, a modem 133, an air interface 134, and a processor interface 135; the radio frequency front end 110 includes a main set receiving module 111 and a diversity receiving module 112, wherein the main set receiving module 111 includes a radio frequency path switching unit 1111. On the broadband rf circuit, an rf path switching unit 1111, i.e., RF Path Switch Unit, is disposed on the main rf signal receiving path of the rf front end 110 to provide dynamic selection paths (normal path and attenuation path). RF Path Switch Unit is controlled by the baseband processor 130 and acts are performed by issuing control instructions, including whether the main set receives a normal or a fade path, fade, callback, and stride selection, etc., primarily through the processor interface 135. The communication service processing module 131 of the baseband processor 130 obtains the main set reference signal receiving power (main set RSRP), diversity reference signal receiving power (diversity RSRP) and tracks the condition of the main diversity combining signal to noise ratio (Comp SINR) in real time, when the main diversity RSRP and the diversity RSRP are both poor and the Comp SINR is low, makes a decision for properly reducing the capability of the main set to receive the RSRP, informs the modem 133 to send out a corresponding control command, and simultaneously observes and compares the condition of Comp SINR improvement, determines the attenuation path corresponding to the optimal Comp SINR as a target attenuation path and informs the air interface 134 to obtain the optimal CQI reporting base station.

The main diversity receiving system provided by the embodiment of the application maintains the balance of main diversity signal receiving by properly reducing the main set receiving performance of the radio frequency front end, and improves the signal-to-noise ratio of main diversity combination under the condition of weak signal coverage, thereby improving the downlink rate and improving the user experience.

Example two

Fig. 3 is a flowchart of a control method of a primary diversity receiving system according to a second embodiment of the present application, where the method may be performed by the primary diversity receiving system. As shown in fig. 3, the method includes:

and S210, the radio frequency front end sends the received radio frequency signals to the transceiver.

S220, the transceiver converts the radio frequency signals into analog signals and sends the analog signals to the baseband processor.

In this embodiment, the rf front-end transmits the received rf signal to the transceiver, which may convert the rf signal to an analog signal. The analog signal may be an IQ signal, i.e., an In-Phase Quadrature signal, I represents In-Phase, Q represents Quadrature (Phase shifted by 90 degrees), and represents two signals with 90 degrees Phase difference. After the transceiver converts the radio frequency signal to an analog signal, the analog signal may be sent to a baseband processor.

S230, the baseband processor processes the analog signals, determines a main diversity combining signal-to-noise ratio, determines a target attenuation path when the main diversity combining signal-to-noise ratio is smaller than a set signal-to-noise ratio threshold, and sends out a control instruction corresponding to the target attenuation path.

In this embodiment, the baseband processor may process the analog signal, calculate the primary diversity combining snr according to the analog signal, and if the primary diversity combining snr is smaller than the set snr threshold, send a control instruction to the rf front end to cause the rf front end to perform an operation of switching the primary diversity signal receiving path to the target attenuation path in order to avoid degradation of the downlink rate.

S240, the radio frequency front end responds to a control instruction sent by the baseband processor to switch the main set receiving path to the target attenuation path.

In this embodiment, the radio frequency front end includes a main set receiving module and a diversity receiving module, and the main set radio frequency signal and the diversity radio frequency signal may be received by the main set receiving module and the diversity receiving module respectively and sent to the transceiver.

In this embodiment, the radio frequency signal includes a main set radio frequency signal and a diversity radio frequency signal, the main set receiving path corresponding to the radio frequency front end includes a normal path and at least one attenuation path, the receiving power of each attenuation path is smaller than the receiving power of the normal path, and the receiving powers corresponding to the attenuation paths are all different. The radio frequency front end can respectively receive the main set radio frequency signal and the diversity radio frequency signal through the main set receiving module and the diversity receiving module.

The baseband processor in this embodiment includes a communication service processing module, the radio frequency front end includes a radio frequency path switching unit, preferably, the main set receiving module includes a radio frequency path switching unit, and when the main set receiving module receives a control instruction sent by the baseband processor, the radio frequency path switching unit may be used to perform an operation of switching the main set receiving path to the target attenuation path. When the radio frequency path switching unit switches the main set receiving path to the target attenuation path, the main set receiving module receives the main set radio frequency signal with the receiving power corresponding to the target attenuation path.

Further, step S230 includes:

s231, the communication service processing module determines a primary diversity combining signal-to-noise ratio, and when the primary diversity combining signal-to-noise ratio is smaller than a set signal-to-noise ratio threshold, a primary set receiving path switching instruction is sent out to control the radio frequency path switching unit to execute primary set receiving path switching operation, and the primary set receiving paths are sequentially switched to all attenuation paths;

s232, after the radio frequency path switching unit executes the main set receiving path switching operation, the communication service processing module obtains the main diversity combining signal-to-noise ratio corresponding to each attenuation path, determines the attenuation path corresponding to the maximum value of the main diversity combining signal-to-noise ratio as a target attenuation path, and sends out a control instruction corresponding to the target attenuation path.

Specifically, the baseband processor may control the radio frequency front end to sequentially switch the main diversity receiving paths to each attenuation path when the main diversity receiving paths are smaller than the set signal-to-noise ratio threshold through the communication service processing module, and track the change condition of the main diversity combining signal-to-noise ratio after each switch of the radio frequency front end, that is, obtain the corresponding value of the main diversity combining signal-to-noise ratio after the radio frequency front end switches the main diversity receiving paths to each attenuation path. After traversing all the attenuation paths corresponding to the radio frequency front end, the baseband processor can acquire the attenuation path corresponding to the optimal main diversity combining signal-to-noise ratio and determine the attenuation path as a target attenuation path, and then sends out a corresponding control instruction to the radio frequency front end, wherein the radio frequency front end switches the main set receiving path to the target attenuation path.

The baseband processor further includes: the analog-to-digital conversion module, the modem and the air interface, the baseband processor in this embodiment processes the analog signal, including:

the analog-to-digital conversion module converts the analog signal into a digital signal; the modem demodulates the digital signal to obtain a main set signal and a diversity signal and sends the main set signal and the diversity signal to the communication service processing module and the air interface; the air interface respectively identifies a main set reference signal received power and a diversity reference signal received power according to the main set signal and the diversity signal, and transmits the main set reference signal received power and the diversity reference signal received power to the communication service processing module.

Specifically, the analog-to-digital conversion module can receive an analog signal sent by the transceiver, convert the analog signal into a digital signal and transmit the digital signal to the next-stage modem for demodulation; the modem demodulates the main set signal and the diversity signal according to the digital signal and then sends the signals to the communication service processing module and the air interface; the air interface may identify the primary set reference signal received power and the diversity reference signal received power based on the primary set signal and the diversity signal, respectively, and similarly send to the communication service processing module.

Further, the communication service processing module determines a primary diversity combining snr, and when the primary diversity combining snr is less than a set snr threshold, the manner of sending the primary set receive path switch instruction may be that step S231 may include:

s2311, a communication service processing module determines a main set signal-to-noise ratio and a diversity signal-to-noise ratio according to the main set signal and the diversity signal;

s2312, determining a main diversity combining signal-to-noise ratio according to the main set signal-to-noise ratio and the diversity signal-to-noise ratio; under the condition that the received power of the main set reference signal and the received power of the diversity reference signal are smaller than the corresponding power threshold, if the signal to noise ratio of the main diversity combination is smaller than the set signal to noise ratio threshold, step S2313 is carried out;

s2313, a main set receiving path switching instruction is sent to the radio frequency front end.

After the communication service processing module acquires the main set signal and the diversity signal sent by the modem, the main set signal to noise ratio and the diversity signal to noise ratio can be respectively identified according to the main set signal and the diversity signal to noise ratio, and the main diversity combined signal to noise ratio is determined according to the main set signal to noise ratio and the diversity signal to noise ratio. When the receiving power of the main set reference signal and the receiving power of the diversity reference signal are poor and the signal to noise ratio of the main diversity combination is low, the control instruction is sent to the modem, and the modem sends the control instruction to the radio frequency front end through the processor interface.

Fig. 4 is a schematic diagram of a control process of a main diversity receiving system according to an embodiment of the present application, where a radio frequency front end (including a main diversity receiving module) sends received radio frequency signals (including a main diversity radio frequency signal and a diversity radio frequency signal) to a transceiver, and then converts the received radio frequency signals into IQ analog signals to be sent to a next stage; the analog-to-digital conversion module of the baseband processor converts the received IQ analog signals into digital signals and transmits the digital signals to the next-stage modem for demodulation; after demodulating the main set and diversity signals, the modem is closely matched and coordinated with the communication service processing module and the control interface, finally, a decision mechanism is made to make the demodulator demodulate and send a control instruction through the processor interface, and the radio frequency path switching unit at the radio frequency front end is instructed to execute corresponding actions so as to identify a target attenuation path corresponding to the optimal combined signal-to-noise ratio (Comp SINR), and the optimal CQI reporting base station is mapped.

The control method of the main diversity receiving system provided by the embodiment of the application can be executed by the main diversity receiving system provided by the embodiment, and has the corresponding functional modules and beneficial effects of the system.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solutions of the present application are achieved, and the present application is not limited herein.

The above embodiments do not limit the scope of the application. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

1. A primary diversity reception system, comprising: a radio frequency front end, a transceiver and a baseband processor;

the radio frequency front end is used for receiving radio frequency signals and responding to control instructions sent by the baseband processor to switch a main set receiving path to a target attenuation path;

2. The primary diversity receiving system of claim 1, wherein the radio frequency front end comprises: a main set receiving module and a diversity receiving module,

3. The main diversity receiving system according to claim 2, wherein said main set receiving path comprises a normal path and at least one attenuation path, the receiving power of each of said attenuation paths is smaller than the receiving power of said normal path, and the receiving power corresponding to each of said attenuation paths is different,

4. The primary diversity receiving system of claim 3, wherein the baseband processor comprises: a communication service processing module is provided for processing the communication service,

5. The primary diversity receiving system of claim 4, wherein the baseband processor further comprises: analog to digital conversion modules, modems and air interfaces,

6. A method for controlling a primary diversity reception system, comprising:

7. The control method of claim 6, wherein the radio frequency signals comprise a main set radio frequency signal and a diversity radio frequency signal; the main set receiving path comprises a normal path and at least one attenuation path, the receiving power of each attenuation path is smaller than that of the normal path, and the receiving power corresponding to each attenuation path is different;

8. The control method according to claim 7, wherein the baseband processor includes a communication service processing module, the radio frequency front end includes a radio frequency path switching unit, the determining a primary diversity combining signal-to-noise ratio, determining a target attenuation path and issuing a control instruction corresponding to the target attenuation path when the primary diversity combining signal-to-noise ratio is less than a set signal-to-noise ratio threshold, includes:

9. The control method according to claim 8, wherein the baseband processor includes: the analog-to-digital conversion module, the modem and the air interface, the baseband processor processes the analog signal, including:

10. The control method according to claim 9, wherein the communication service processing module determines the primary diversity combining signal-to-noise ratio, and when the primary diversity combining signal-to-noise ratio is less than the set signal-to-noise ratio threshold, issues a primary set reception path switching instruction, comprising: