Dual-channel receiving device and portable communication terminal
By designing a dual-channel receiving device and employing a signal processing module with a dual-VCO structure, the problem of traditional portable communication terminals only being able to work in a single mode is solved. This enables simultaneous support for both trunking and direct-to-connect modes, improving the convenience of portable communication terminals.
Patent Information
- Application Number
- CN202422858094.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Traditional portable communication terminals can only support one communication mode at a time, resulting in poor convenience and an inability to respond to incoming call signals in both trunking and direct-call modes simultaneously.
Design a dual-channel receiving device, including first and second signal processing modules and first and second receiving channels. A dual-VCO structure is implemented through two independent voltage-controlled oscillators, which supports the simultaneous reception and processing of cluster and pass-through signals.
It enables portable communication terminals to work simultaneously in both cluster and direct-call modes, improving convenience and allowing them to respond to incoming call signals in both modes at the same time.
Smart Images
Figure CN223463006U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to wireless communication technical field, concretely relates to a double -channel receiving device and portable communication terminal. BACKGROUND
[0002] As the portable communication terminal for specific scene, it usually has the characteristics of dual mode (group / direct) single standby, small size, light weight, supporting Beidou positioning, hardware encryption communication etc. It is usually used in major activities security and explosion -proof special scene. Although the traditional portable communication terminal has the function of dual mode single standby, that is, it supports both group mode and direct mode, but it can only work in one mode at the same time, and it is inconvenient to switch to another mode when another mode is needed. SUMMARY
[0003] The utility model provides a double -channel receiving device and portable communication terminal, aims at solving the problem of poor convenience caused by the current portable communication terminal can only support one mode at the same time.
[0004] In the first aspect, the utility model provides a double -channel receiving device, it includes first signal processing module, second signal processing module, first receiving channel and second receiving channel, the output of first signal processing module is connected with the main control module of portable communication terminal, the output of second signal processing module is connected with the main control module, the input of first receiving channel is connected with the antenna of portable communication terminal, and the output of first receiving channel is connected with first signal processing module, the input of second receiving channel is connected with the antenna, and the output of second receiving channel is connected with second signal processing module.
[0005] Further, the first receiving channel includes front end input circuit and first local oscillator signal output circuit, the input of front end input circuit is connected with the antenna, and the output of front end input circuit is connected with first signal processing module, and the output of first local oscillator signal output circuit is connected with first signal processing module.
[0006] Further, the first local oscillator signal output circuit includes two independent voltage controlled oscillators.
[0007] Further, the front end input circuit includes low noise amplifier, high pass filter and switch element, the input of switch element is connected with the antenna, the output of switch element is connected with one end of high pass filter, the other end of high pass filter is connected with one end of low noise amplifier, and the other end of low noise amplifier is connected with first signal processing module.
[0008] Further, the second receiving channel comprises the front-end input circuit, and the low-noise amplifier is further connected with the second signal processing module.
[0009] Further, the second receiving channel further comprises a second local oscillator signal output circuit, which is connected with the second signal processing module.
[0010] Further, an output channel is further included, an input end of the output channel is connected with an output end of the second signal processing module, and an output end of the output channel is connected with the switch element.
[0011] Further, the output channel comprises a radio frequency power amplifier, an input end of the radio frequency power amplifier is connected with an output end of the second signal processing module, and an output end of the radio frequency power amplifier is connected with the switch element.
[0012] Further, the first signal processing module and the second signal processing module both comprise a zero intermediate frequency chip.
[0013] In a second aspect, the utility model also provides a portable communication terminal, it includes master control module, antenna and the double channel receiving device of any one described above.
[0014] The utility model discloses a portable communication terminal includes master control module, antenna and double channel receiving device, and double channel receiving device includes first signal processing module, second signal processing module, first receiving channel and second receiving channel, and first signal processing module and second signal processing module are connected with master control module, and first signal processing module is connected with first receiving channel still, and second signal processing module is connected with second receiving channel still, and first receiving channel and second receiving channel are connected with antenna, for receiving input signal, and input signal can enter first signal processing module through first receiving channel or enter second signal processing module through second receiving channel, when one of signal processing modules is occupied, and new input signal can enter another signal processing module, namely, first signal processing module and second signal processing module work independently each other, so that portable communication terminal can work under two kinds of modes simultaneously, and the convenience is improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the utility model embodiment technical scheme, below will to the drawing needed to be used in the embodiment description simple introduction, obviously, below description in the drawing is some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, according to these drawings, still can obtain other drawings.
[0016] Figure 1is a block schematic diagram of a dual-channel receiving device provided by an embodiment of the utility model;
[0017] Figure 2 is a block schematic diagram of a dual-channel receiving device provided by another embodiment of the utility model;
[0018] Figure 3 is a block schematic diagram of a dual-channel receiving device provided by still another embodiment of the utility model;
[0019] Figure 4 is a circuit diagram of a dual-channel receiving device provided by an embodiment of the utility model. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are some of the embodiments of the utility model, but not all the embodiments of the utility model. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0021] It should be understood that, when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of the described features, integers, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, operations, elements, components, and / or groups thereof.
[0022] It should also be understood that the terms used in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the specification and the appended claims of the utility model, the singular forms "a", "an", and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should be further understood that the term "and / or" used in the specification and the appended claims of the utility model refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.
[0023] In addition, the direction terms mentioned in the utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only the directions of the attached drawings and the state of product use. Therefore, the direction terms used are for the purpose of description and understanding of the utility model, and are not intended to limit the utility model. In addition, in the drawings, structures with similar or identical structures are denoted by the same reference numerals.
[0024] Referring to Figures 1 to 4 , Figure 1is a block schematic diagram of a dual-channel receiving device 100 provided by an embodiment of the present application; Figure 2 is a block schematic diagram of a dual-channel receiving device 100 provided by another embodiment of the present application; Figure 3 is a block schematic diagram of a dual-channel receiving device 100 provided by still another embodiment of the present application; Figure 4 is a circuit diagram of a dual-channel receiving device 100 provided by an embodiment of the present application. Figure 1 As shown in the figure, the dual-channel receiving device 100 comprises a first signal processing module 10, a second signal processing module 20, a first receiving channel 30 and a second receiving channel 40; an output end of the first signal processing module 10 is connected with a master control module 200 of a portable communication terminal; an output end of the second signal processing module 20 is connected with the master control module 200; an input end of the first receiving channel 30 is connected with an antenna 300 of the portable communication terminal, and an output end of the first receiving channel 30 is connected with the first signal processing module 10; an input end of the second receiving channel 40 is connected with the antenna 300, and an output end of the second receiving channel 40 is connected with the second signal processing module 20.
[0025] Specifically, the portable communication terminal refers to a terminal with communication function and convenient to carry, for example, a walkie-talkie. The conventional portable communication terminal usually has a dual-mode single standby function, which means that the portable communication terminal supports two different modes, but can only select one mode for communication, for example, when the selected mode of the portable communication terminal is the straight-through mode, it cannot answer the group communication, that is, when there is a group communication call, it cannot respond to the call.
[0026] The group mode of the portable communication terminal is mainly used for group dispatching command, which needs to be managed and controlled by a center control station, and the straight-through mode refers to the direct communication between walkie-talkies without the need of forwarding through a relay station or a center control station, and the communication distance is usually short. The conventional portable communication terminal cannot respond to the group mode call when working in one mode, for example, when working in the straight-through mode.
[0027] The portable communication terminal provided by the present application comprises a master control module 200, an antenna 300 and a dual-channel receiving device 100, the master control module 200 is used for controlling the operation of the portable communication terminal, the antenna 300 is used for receiving and sending signals, and the dual-channel receiving device 100 is used for realizing the simultaneous reception of group call signals and straight-through call signals, which is convenient for the master control module 200 to process.
[0028] The double-channel receiving device 100 comprises a first signal processing module 10, a second signal processing module 20, a first receiving channel 30 and a second receiving channel 40. The first signal processing module 10 is connected with the first receiving channel 30, and the second signal processing module 20 is connected with the second receiving channel 40. Both the first receiving channel 30 and the second receiving channel 40 are connected with the antenna 300. When an input signal enters the double-channel receiving device 100 through the antenna 300, it can enter the first signal processing module 10 or the second signal processing module 20 through the first receiving channel 30 or the second receiving channel 40. Preferably, when there is only one input signal, the first receiving channel 30 is used for processing, i.e., when there is only one input signal, the input signal enters the first signal processing module 10 through the first receiving channel 30. The first signal processing module 10 performs mixing processing on the input signal and outputs the mixed signal to the master module 200 for subsequent processing.
[0029] When the first signal processing module 10 is processing an input signal, if there is another input signal, it is processed by the second signal processing module 20. For example, when the portable communication terminal is in the straight-through mode and is communicating, if a group signal is incoming at this time, the input signal corresponding to the group signal can be processed by the second signal processing module 20 and finally collected to the master module 200. The master module 200 detects the incoming group signal at this time, and can directly interrupt the straight-through mode and access the group communication.
[0030] Referring to Figure 2 As a further embodiment, the first receiving channel 30 comprises a front-end input circuit 32 and a first local oscillator signal output circuit 31. The input end of the front-end input circuit 32 is connected with the antenna 300, and the output end of the front-end input circuit 32 is connected with the first signal processing module 10. The output end of the first local oscillator signal output circuit 31 is connected with the first signal processing module 10.
[0031] The front-end input circuit 32 is used for processing the input signal, which can comprise a filter and an amplifier. The filter can filter out signals of specific frequencies, and the amplifier can amplify the signals. The first local oscillator signal output circuit 31 is used for outputting a local oscillator signal to the first signal processing module 10. The first signal processing module 10 mixes the local oscillator signal and the received input signal to obtain an intermediate frequency signal, and then outputs the intermediate frequency signal to the master module 200.
[0032] As a further embodiment, the first local oscillator signal output circuit 31 comprises two independent voltage-controlled oscillators.
[0033] The double-VCO structure refers to an architecture in which two independent voltage-controlled oscillators are used in a system. The two voltage-controlled oscillators can work in parallel, and a wider frequency coverage and higher phase noise performance can be achieved by selecting or switching different voltage-controlled oscillators. The circuit structure of the first local oscillator signal output circuit 31 can be a double-VCO structure commonly used in the art, and the specific structure is not limited here.
[0034] Referring to Figure 4 As a further embodiment, the front-end input circuit 32 includes a low-noise amplifier LNA, a high-pass filter HPF, and a switching element Q. The input end of the switching element Q is connected with the antenna 300, the output end of the switching element Q is connected with one end of the high-pass filter HPF, the other end of the high-pass filter HPF is connected with one end of the low-noise amplifier LNA, and the other end of the low-noise amplifier LNA is connected with the first signal processing module 10.
[0035] The front-end input circuit 32 can include a low-noise amplifier LNA, a high-pass filter HPF, and a switching element Q. The low-noise amplifier LNA is connected with the first signal processing module 10 and the high-pass filter HPF, respectively. The high-pass filter HPF is further connected with the switching element Q, the switching element Q is connected with the low-pass filter LPF, and the low-pass filter LPF is connected with the antenna 300. After the input signal is input through the antenna 300, it is filtered by the low-pass filter LPF, input to the high-pass filter HPF through the switching element Q, filtered by the high-pass filter HPF, and then input to the low-noise amplifier LNA. Finally, it is amplified by the low-noise amplifier LNA and output to the first signal processing module 10 for mixing.
[0036] As a further embodiment, the second receiving channel 40 includes the front-end input circuit 32, and the low-noise amplifier LNA is further connected with the second signal processing module 20. As a further embodiment, the second receiving channel 40 further includes a second local oscillator signal output circuit 41, which is connected with the second signal processing module 20.
[0037] The second receiving channel 40 can include the front-end input circuit 32 and the second local oscillator signal output circuit 41, and the input signal is input to the first signal processing module 10 or the second signal processing module 20 through the low-noise amplifier LNA. Figure 3 It can be seen that the second receiving channel 40 can share one front-end input circuit 32 with the first receiving channel 30. After the input signal is input to the low-noise amplifier LNA, it can enter the first signal processing module 10 or the second signal processing module 20. When it enters the second signal processing module 20, the second local oscillator signal output circuit 41 outputs the local oscillator signal to the second signal processing module 20 for mixing processing.
[0038] Referring toFigure 3 As a further embodiment, the output channel 50 is further included, an input end of the output channel 50 is connected with an output end of the second signal processing module 20, and an output end of the output channel 50 is connected with the switch element Q.
[0039] The output channel 50 is used for outputting a signal, and is connected with the second signal processing module 20, that is, the master control module 200 outputs the output signal to the second signal processing module 20, the output signal is output to the antenna 300 through the output channel 50 after being processed by the second signal processing module 20, and is emitted through the antenna 300.
[0040] As a further embodiment, the output channel 50 includes a radio frequency power amplifier RF, an input end of the radio frequency power amplifier RF is connected with an output end of the second signal processing module 20, and an output end of the radio frequency power amplifier RF is connected with the switch element Q.
[0041] The output channel 50 can include a buffer and a radio frequency power amplifier RF, the buffer is used for buffering the output data, and the signal is amplified by the radio frequency power amplifier RF and then output to the antenna 300 through the switch element Q.
[0042] As a further embodiment, the first signal processing module 10 and the second signal processing module 20 both include a zero intermediate frequency chip.
[0043] The first signal processing module 10 includes a zero intermediate frequency chip U1, the second signal processing module 20 includes a zero intermediate frequency chip U2, and the U1 and the U2 both are built-in with a phase-locked loop, which is used for cooperating with a double VCO structure in the first local oscillator signal output circuit 31 or the second local oscillator signal output circuit 41 to generate a stable output signal.
[0044] The utility model also provides a portable communication terminal, the portable communication terminal includes master control module 200, antenna 300 and the double channel receiving device 100 of any one of above-mentioned embodiment, the double channel receiving device 100 includes first signal processing module 10, second signal processing module 20, first receiving channel 30 and second receiving channel 40, the output of first signal processing module 10 is connected with the master control module 200 of portable communication terminal, the output of second signal processing module 20 is connected with master control module 200, the input of first receiving channel 30 is connected with antenna 300 of portable communication terminal, and the output of first receiving channel 30 is connected with first signal processing module 10, the input of second receiving channel 40 is connected with antenna 300, and the output of second receiving channel 40 is connected with second signal processing module 20.
[0045] Specifically, the portable communication terminal refers to a terminal with communication function and convenient to carry, such as a walkie-talkie. The conventional portable communication terminal usually has a dual-mode single standby function, which means that the portable communication terminal supports two different modes, but only one mode can be selected for communication, for example, when the selected mode of the portable communication terminal is the direct mode, it cannot answer the group communication, that is, when there is a group communication call, it cannot respond to the call.
[0046] The group mode of the portable communication terminal is mainly used for group dispatching command, which needs to be managed and controlled by the center control station, and the direct mode refers to the direct communication between the walkie-talkies without the need of forwarding through the relay station or the center control station, and the communication distance is usually short. The conventional portable communication terminal cannot respond to the group mode call when working in one mode, for example, when working in the direct mode.
[0047] The portable communication terminal provided by the utility model includes a main control module 200, an antenna 300 and a double-channel receiving device 100, the main control module 200 is used for controlling the operation of the portable communication terminal, the antenna 300 is used for receiving and sending signals, and the double-channel receiving device 100 is used for realizing that group incoming signals and direct incoming signals can be received at the same time, which is convenient for the main control module 200 to process.
[0048] The double-channel receiving device 100 includes a first signal processing module 10, a second signal processing module 20, a first receiving channel 30 and a second receiving channel 40, the first signal processing module 10 is connected with the first receiving channel 30, the second signal processing module 20 is connected with the second receiving channel 40, and the first receiving channel 30 and the second receiving channel 40 are both connected with the antenna 300. When the input signal enters the double-channel receiving device 100 through the antenna 300, it can enter the first signal processing module 10 or the second signal processing module 20 through the first receiving channel 30 or the second receiving channel 40, preferably, when there is only one input signal, it is preferentially processed by the first receiving channel 30, that is, when there is only one input signal, the input signal enters the first signal processing module 10 through the first receiving channel 30, the first signal processing module 10 performs frequency mixing processing on the input signal, and outputs the frequency mixing processed signal to the main control module 200, and the main control module 200 performs subsequent processing.
[0049] When the first signal processing module 10 is processing an input signal, if other input signals are input, they are processed by the second signal processing module 20, for example, when the portable communication terminal is in the straight-through mode and is communicating, if a group signal is incoming at this time, the input signal corresponding to the group signal can be processed by the second signal processing module 20, and is finally integrated to the main control module 200, the main control module 200 detects the incoming group signal at this time, and can directly interrupt the straight-through mode and access the group communication.
[0050] The double-channel receiving device and the portable communication terminal can receive two input signals through the first receiving channel and the second receiving channel simultaneously, so that the portable communication terminal supports the response to the incoming signals of two modes simultaneously, and the convenience is improved.
[0051] The above is only a specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of claims.
Claims
1. A dual channel receiving device, characterized by The double-channel receiving device is applied to a portable communication terminal and comprises: a first signal processing module, an output end of which is connected with a main control module of the portable communication terminal; a second signal processing module, an output end of which is connected with the main control module; a first receiving channel, an input end of which is connected with an antenna of the portable communication terminal, and an output end of which is connected with the first signal processing module; a second receiving channel, an input end of which is connected with the antenna, and an output end of which is connected with the second signal processing module.
2. The dual channel receiving device of claim 1, wherein, The first receiving channel comprises a front-end input circuit and a first local oscillator signal output circuit. An input end of the front-end input circuit is connected with the antenna, and an output end of the front-end input circuit is connected with the first signal processing module. An output end of the first local oscillator signal output circuit is connected with the first signal processing module.
3. The dual channel receiving device of claim 2, wherein, The first local oscillator signal output circuit comprises two independent voltage-controlled oscillators.
4. The dual channel receiving device of claim 2, wherein, The front-end input circuit comprises a low-noise amplifier, a high-pass filter and a switching element. An input end of the switching element is connected with the antenna, an output end of the switching element is connected with one end of the high-pass filter, the other end of the high-pass filter is connected with one end of the low-noise amplifier, and the other end of the low-noise amplifier is connected with the first signal processing module.
5. The dual channel receiving device of claim 4, wherein, The second receiving channel comprises the front-end input circuit, and the low-noise amplifier is further connected with the second signal processing module.
6. The dual channel receiving device of claim 5, wherein, The second receiving channel further comprises a second local oscillator signal output circuit, which is connected with the second signal processing module.
7. The dual channel receiving device of claim 4, wherein, The output channel further comprises a radio frequency power amplifier.
8. The dual channel receiving device of claim 7, wherein, An input end of the radio frequency power amplifier is connected with the output end of the second signal processing module, and an output end of the radio frequency power amplifier is connected with the switching element. The first signal processing module and the second signal processing module each comprise a zero intermediate frequency chip.
9. The dual channel receiving device of claim 1, wherein, The double-channel receiving device comprises a main control module, an antenna and the double-channel receiving device according to any one of claims 1-9.
10. A portable communication terminal, characterized by comprising: