Split-type GSM communication processing system and communication terminal

Abstract

This invention discloses a split-type GSM communication processing system and communication terminal. The GSM communication processing system includes a GSM signal processor and a control switch independent of the GSM signal processor. The control switch controls the switching of the GSM signal processor's operating frequency band. The GSM signal processor is electrically connected to the control switch, and the control switch is constructed based on a GPIO-type switch structure. An initial bit port is provided at the front and / or rear of the control switch. The initial bit port is grounded through a matching impedance. When the controlled switch performs an initialization action, the initial bit port is connected to ground through the matching impedance, which matches the noise signal generated by the control switch. The GSM communication processing system disclosed in the above technical solution of this invention can significantly reduce the hardware cost of the GSM communication processing system and effectively eliminate the noise of the control switch, enabling the GSM signal processor to operate in a high-isolation state.

Description

Technical Field

[0001] This invention relates to the field of radio frequency communication technology, and in particular to a split-type GSM communication processing system and communication terminal. Background Technology

[0002] Communication devices, such as mobile phones, use radio frequency (RF) communication technology for wireless communication. Currently, RF communication systems used in communication terminals have evolved from 2G to 5G. Although 4G and 5G signals now fully cover daily life and production, communication devices are generally compatible with 2G communication systems. That is, in addition to a high-level communication processing system, communication devices also have a GSM communication processing system.

[0003] For GSM communication processing systems, most conventional hardware designs currently employ an integrated approach, also known as the TXM (Transmission Tube Module) model. In this model, the 2G chip and control switches are integrated together to form a single TXM hardware system. In this system, the PVT (Power vs. Time) and switching and modulation spectra of the GSM communication processing system primarily depend on the built-in suppression circuitry and isolation of the TXM itself. Simultaneously, the internal control devices are MIPI-type control ports, ensuring the accuracy and reliability of the timing sequence and resulting in low noise.

[0004] While the aforementioned TXM hardware system has many advantages, its high price makes it unsuitable for some low-end models. In low-end communication equipment, to reduce costs, the 2G chip and control switch in the TXM are usually separated into two independent units. Simultaneously, the control switch is replaced from a MIPI type with a lower-cost GPIO type. Although this significantly reduces costs, it results in higher noise when the control switch operates sequentially, leading to failures in GSM-related complex tests, such as PVT and switch spectrum issues. Summary of the Invention

[0005] The purpose of this invention is to provide a split-type GSM communication processing system and communication terminal that can significantly reduce the hardware cost of GSM communication systems and effectively reduce the impact of noise.

[0006] To achieve the above objectives, this invention discloses a split-type GSM communication processing system, comprising a GSM signal processor and a control switch independent of the GSM signal processor. The control switch is used to control the switching of the operating frequency band of the GSM signal processor. The GSM signal processor is electrically connected to the control switch, and the control switch is constructed based on a GPIO-type switch structure. An initial bit port is provided at the front end and / or the rear end of the control switch. The initial bit port is grounded through a matching impedance, and when the controlled switch performs an initialization action, the initial bit port is connected to ground through the matching impedance. The matching impedance is matched with the noise signal generated by the control switch.

[0007] Preferably, the GSM signal processor and the control switch are directly connected via a communication line, and the initial bit port is located at the front end of the control switch.

[0008] Preferably, the GSM signal processor is electrically connected to the control switch via a single-pole double-throw switch, the normal interface of the single-pole double-throw switch is used as the initial bit port, and the dynamic interface of the single-pole double-throw switch is electrically connected to the control switch.

[0009] Preferably, the GSM signal processor is provided with a low-frequency interface and a high-frequency interface, and the low-frequency interface and the high-frequency interface are electrically connected to the control switch through a single-pole double-throw switch.

[0010] Preferably, the initial position port is provided at the front end of the control switch.

[0011] Preferably, the GSM signal processor is electrically connected to each of the control switches.

[0012] Preferably, the matching impedance is 45 to 55 ohms.

[0013] Preferably, the matching impedance is 50 ohms.

[0014] The present invention also discloses a communication terminal, characterized in that it includes a base on which a split-type GSM communication processing system as described above is disposed.

[0015] Compared with the prior art, the GSM communication processing system disclosed in the above technical solution of the present invention separates and independently arranges the GSM signal processor and the control switch, and the control switch is of GPIO type, thereby significantly reducing the hardware cost of the GSM communication processing system. In addition, by setting the initial bit port and matching impedance, when the GSM signal processor is working, during the process of prioritizing the initialization of the control switch, the control switch is grounded through the initial bit port to effectively eliminate the noise of the control switch, so that the GSM signal processor is in a high isolation state. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the GSM communication processing system in one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the GSM communication processing system in another embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the GSM communication processing system in another embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the GSM communication processing system in another embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the GSM communication processing system in another embodiment of the present invention. Detailed Implementation

[0021] To illustrate the technical content, structural features, objectives, and effects of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] This embodiment discloses a wireless communication terminal based on radio frequency communication technology, which includes a base on which a GSM communication processing system is mounted, such as... Figure 1 and Figure 2 The GSM communication processing system includes a GSM signal processor 1 and a control switch 2 independent of the GSM signal processor 1. That is, the GSM signal processor 1 and the control switch 2 are two separate entities. Moreover, the control switch 2 is built based on a GPIO type switch structure, thereby significantly reducing the hardware cost of the GSM communication processing system.

[0023] Additionally, the control switch 2 has an initial bit port J at its front end and / or rear end. The initial bit port J is grounded through a matching impedance R. When the controlled switch 2 performs its initialization action, the initial bit port J is connected to ground through the matching impedance R, which matches the noise signal generated by the control switch 2. When the GSM signal processor 1 is working, during the priority initialization of the control switch 2, the control switch 2 is grounded through the initial bit port J to effectively eliminate noise from the control switch 2, thus placing the GSM signal processor 1 in a high-isolation state. It should be noted that in this embodiment, "front end" or "rear end" refers to the direction of signal flow. Since the signal flows from the GSM signal processor 1 to the control switch 2, the front end in this embodiment can also be understood as the end of the signal, and the rear end as the beginning of the signal.

[0024] Specifically, one embodiment, such as Figure 1The GSM signal processor 1 and the control switch 2 are directly connected via a communication line, and the initial bit port J is set at the front end of the control switch 2.

[0025] Another embodiment, such as Figure 2 The GSM signal processor 1 is electrically connected to the control switch 2 via a single-pole double-throw (SPD) switch K. The normal interface of the SPD switch K is used as the initial bit port J, and the dynamic interface of the SPD switch K is electrically connected to the control switch 2. In this embodiment, the control pin of the control switch 2 is also connected to the control bit of the SPD switch K. Thus, when the control switch 2 performs a reset, it sends a reset action to the SPD switch K, causing the control switch 2 to be connected to ground through the SPD switch K, thereby eliminating noise signals and putting the GSM signal processor 1 in a high-isolation state.

[0026] Furthermore, such as Figure 3 The GSM signal processor 1 is equipped with a low-frequency interface LB and a high-frequency interface HB. The low-frequency interface LB and the high-frequency interface HB are electrically connected to the control switch 2 through a single-pole double-throw switch K. In this embodiment, the low-frequency and high-frequency signal channels on the GSM signal processor 1 are processed separately. This can eliminate the noise signal generated by the control switch 2. When the GSM signal processor is operating in low-frequency mode, the single-pole double-throw switch K located at the high-frequency interface HB can also achieve a high isolation state, thus disconnecting the high-frequency path and suppressing the second harmonic of the high-frequency signal from being coupled and radiated out through the high-frequency interface HB.

[0027] In addition, such as Figure 4 In the case of connection via a single-pole double-throw switch K, that is, an initial position port J is set at the rear end of control switch 2, or an initial position port J is set at the front end of control switch 2, so that noise filtering channels are set at both the beginning and end of the signal.

[0028] Furthermore, the GSM signal processor 1 can also be electrically connected to multiple control switches 2 to avoid the situation where a single control switch 2 has insufficient interfaces. For example, such as Figure 5 When two control switches 2 are configured for the GSM signal processor 1, the GSM signal processor 1 is connected to a control switch 2 through a single-pole double-throw switch K.

[0029] Furthermore, in the above embodiments, the matching impedance R is 45 to 55 ohms, and specifically, the matching impedance R is preferably 50 ohms.

[0030] In summary, the GSM communication processing system configured in the communication terminal disclosed in this invention separates the GSM signal processor 1 and the control switch 2 to reduce hardware costs. Furthermore, by using the initial bit port J and the matching impedance R, the control switch 2 is grounded during initialization, eliminating noise from the control switch 2 and thereby enabling the GSM signal processor 1 to be in a high isolation state.

[0031] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A split-type GSM communication processing system, characterized in that, The system includes a GSM signal processor and a control switch independent of the GSM signal processor. The control switch is used to control the switching of the operating frequency band of the GSM signal processor. The GSM signal processor is electrically connected to the control switch, and the control switch is constructed based on a GPIO-type switch structure. The control switch has an initial bit port at its front end and / or rear end. The initial bit port is grounded through a matching impedance. When the controlled switch performs an initialization action, the initial bit port is connected to ground through the matching impedance. The matching impedance is matched to the noise signal generated by the control switch. The GSM signal... The processor and the control switch are directly connected via a communication line, and the initial bit port is located at the front end of the control switch; alternatively, the GSM signal processor is electrically connected to the control switch via a single-pole double-throw switch, the normal interface of the single-pole double-throw switch is used as the initial bit port, the dynamic interface of the single-pole double-throw switch is electrically connected to the control switch, and the GSM signal processor is provided with a low-frequency interface and a high-frequency interface, the low-frequency interface and the high-frequency interface are respectively electrically connected to the control switch via a single-pole double-throw switch, and the initial bit port is located at the front end of the control switch.

2. The split-type GSM communication processing system according to claim 1, characterized in that, The GSM signal processor is electrically connected to each of the control switches.

3. The split-type GSM communication processing system according to claim 1, characterized in that, The matching impedance is 45 to 55 ohms.

4. The split-type GSM communication processing system according to claim 3, characterized in that, The matching impedance is 50 ohms.

5. A communication terminal, characterized in that, It includes a substrate on which a split-type GSM communication processing system as described in any one of claims 1 to 4 is disposed.

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