Multi-mode 5G signal processing circuit and communication equipment

Abstract

The invention relates to a multi-mode 5G signal processing circuit and communication equipment. The signal processing circuit comprises an auxiliary carrier signal amplification unit and a multiplexing filtering unit which are connected with each other. And the multiplexing filtering unit comprises a B1 filter, a B5 filter, a B41 filter and a B7 filter which are respectively used for processing signals in a frequency band of 2110-2170 MHz, a frequency band of 869-894 MHz, a frequency band of 2496-2690 MHz and a frequency band of 2620-2690 MHz, and each filter integrates transmitting and receiving functions. The circuit further comprises a signal processing unit, a main carrier signal amplification unit, an antenna system, a multi-mode multi-frequency power amplifier and the like. According to the invention, by optimizing the radio frequency circuit structure, the number of devices is reduced, and the circuit complexity and the design cost are reduced; meanwhile, due to the design of the integrated filter, the signal transmission loss is reduced, the signal processing performance is improved, signal receiving and transmitting in an NSA mode and a CA mode can be flexibly achieved, and various networking requirements of a modern mobile communication system are met.

Description

Technical Field

[0001] The present invention relates to the field of mobile communications, and in particular to a multi-mode 5G signal processing circuit and communication equipment. Background Art

[0002] With the rapid development of 5G mobile communication technology, mobile terminals need to support more and more RF bands and their combinations, which puts higher requirements on RF processing circuits. The current 5G terminal RF processing circuit mainly adopts a dual-channel transceiver design, which requires the use of dual antennas, power amplifiers, duplexers, transceiver filters and other components to achieve signal processing in different frequency bands.

[0003] like Figure 1 As shown, the 5G signal processing circuit in the prior art adopts a dual-path transceiver design. In order to meet the combined requirements of various carrier aggregation (CA) and non-independent networking (NSA), this solution adopts two complete sets of signal processing components in the circuit design. Specifically, the circuit includes two independent antenna systems, two sets of power amplifiers (PA), two sets of duplexers, and two sets of transceiver (TRX) filters. This design structure requires each signal processing path to be configured with an independent and complete RF device link.

[0004] This dual-path design has technical defects in many aspects. First, since two complete sets of RF components need to be configured, the circuit structure is complex and the number of devices is large, which directly increases the manufacturing cost and circuit board area of ​​the product. Secondly, each path in the dual-path signal processing structure contains multiple stages of RF devices in series, which increases the length of the signal transmission path. The signal transmission loss between the components is large, which reduces the signal processing performance. In addition, when it is necessary to switch between different working modes, it is difficult for the two independent signal processing paths to achieve flexible and efficient mode conversion, which affects the overall working efficiency of the communication system.

[0005] These technical problems have resulted in a series of shortcomings in mobile terminal products, such as high cost, poor signal performance, and low work efficiency, which have restricted the further development and application promotion of 5G terminal products. Summary of the invention

[0006] The purpose of the present invention is to provide a 5G NSA processing circuit and communication equipment to solve the technical problems of complex circuit design, high cost and poor signal performance in the prior art.

[0007] To achieve the above-mentioned purpose, the present invention provides a 5G NSA processing circuit, including an auxiliary carrier signal amplifying unit and a multiplexing filtering unit, wherein the auxiliary carrier signal amplifying unit is connected to the multiplexing filtering unit; the multiplexing filtering unit includes: a B1 filter for processing 2110-2170MHz frequency band signals; a B5 filter for processing 869-894MHz frequency band signals; a B41 filter for processing 2496-2690MHz frequency band signals; and a B7 filter for processing 2620-2690MHz frequency band signals; wherein the B1 filter, the B5 filter, the B41 filter and the B7 filter all integrate sending and receiving functions.

[0008] Furthermore, a signal processing unit is also included, and the signal processing unit is connected to the auxiliary carrier signal amplification unit respectively, and the signal processing unit includes a first receiving port, a second receiving port, a third receiving port and a fourth receiving port. Specifically, the first receiving port, the second receiving port, the third receiving port and the fourth receiving port are connected to the B5 filter, the B1 filter, the B41 filter and the B7 filter respectively through the auxiliary carrier signal amplification unit.

[0009] Furthermore, it also includes a main carrier signal amplifying unit, and the signal processing unit also includes a fifth receiving port, a sixth receiving port and a seventh receiving port, which are connected to the main carrier signal amplifying unit.

[0010] Furthermore, it also includes an auxiliary carrier antenna and an auxiliary carrier antenna switch, and the multiplexing filter unit is connected to the auxiliary carrier antenna through the auxiliary carrier antenna switch. At the same time, it also includes a full-band duplexer, a TX filter, a main carrier antenna and a main carrier antenna switch, and the output end of the main carrier signal amplification unit is connected to the main carrier antenna through the full-band duplexer, the TX filter and the main carrier antenna switch in sequence.

[0011] Specifically, it also includes a multi-mode multi-frequency power amplifier, the input end of which is connected to the signal processing unit, and the output end is connected to the full-band duplexer. The multi-mode filter unit is used to realize signal transmission and reception in NSA mode and CA mode, and the B1 filter is used to process the LTE main carrier signal in NSA mode and realize multi-frequency combination work with other filters.

[0012] The present invention sets a multiplex filtering unit and makes it include B1, B5, B41 and B7 filters, so that each filter integrates sending and receiving functions, effectively reducing the design complexity of the circuit, reducing the number of devices used, thereby reducing the overall design cost, and at the same time, by optimizing the signal processing path, reducing the signal transmission loss and improving the signal receiving and sending performance.

[0013] By configuring the main carrier signal amplification unit and the auxiliary carrier signal amplification unit to work together, combined with the design of a full-band duplexer and a multi-mode and multi-frequency power amplifier, flexible switching between the NSA mode and the CA mode is achieved, thereby improving the system's operating efficiency. At the same time, by reasonably setting the connection method between the antenna switch and the signal processing unit, the signal transmission path is optimized, further improving the communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a 5G NSA processing circuit in the prior art.

[0015] Figure 2 Schematic diagram of the structure of a 5G signal processing circuit in an embodiment of the present invention.

[0016] In the figure: 1. Auxiliary carrier antenna, 2. Auxiliary carrier antenna switch, 3. Multi-mode multi-frequency power amplifier, 4. Auxiliary carrier signal amplification unit, 5. B5 filter, 6. B1 filter, 7. B41 filter, 8. B7 filter, 9. Full-band duplexer, 10. TX filter, 11. Main carrier signal amplification unit, 12. Signal processing unit, 13. Main carrier antenna switch, 14. Main carrier antenna. DETAILED DESCRIPTION

[0017] To make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific implementations and drawings. It should be noted that the implementations and features of the implementations in the present invention can be combined with each other without conflict.

[0018] It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "installation", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] In the description of the present invention, it should be noted that the use of words such as "first", "second", etc. is only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In addition, unless otherwise clearly specified and limited, words such as "including", "comprising", "having", etc. should be understood as open terms, indicating that other elements besides the listed elements may be included.

[0020] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, it should be noted that these embodiments are only used to illustrate the basic principles of the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can modify, replace, combine or replace these embodiments in various forms based on the basic principles of the present invention, and these changes or modifications should all fall within the scope of protection of the present invention.

[0021] To facilitate understanding of the technical solution of the present invention, some professional terms used in the present invention are explained below. It should be noted that the following glossary is only used to help understand the technical terms used in the present invention and should not be understood as limiting the scope of protection of the present invention.

[0022] In mobile communication technology, network deployment modes mainly include NSA and SA. Among them, NSA (Non-Standalone) refers to the non-independent networking mode, which needs to rely on the existing 4G core network, and its control plane uses the 4G network and the data plane uses the 5G network; while SA (Standalone) refers to the independent networking mode, which is completely based on the 5G network architecture and can independently complete all communication functions.

[0023] In order to increase the data transmission rate, modern mobile communication systems widely use CA (Carrier Aggregation) technology, which is carrier aggregation technology. This technology significantly improves the system data throughput by using multiple carrier frequency bands at the same time. In NSA mode, the carrier that carries control signaling is usually called the primary carrier, and the carrier used to provide high-speed data transmission is called the secondary carrier.

[0024] In terms of duplex communication, there are two main modes: FDD and TDD.

[0025] Frequency Division Duplex (FDD) uses different frequency bands for uplink and downlink transmission respectively; TDD (Time Division Duplex)

[0026] Instantaneous division duplex (IDD) distinguishes uplink and downlink transmissions in the same frequency band by using different time intervals.

[0027] LTE (Long Term Evolution), as the standard of the fourth generation of mobile communication technology, still plays an important role in the current 5G network deployment. Especially in NSA mode, ENDC (E-UTRAN New Radio-Dual Connectivity) technology is used to achieve dual connectivity of LTE and NR, providing users with a better network service experience.

[0028] In carrier aggregation applications, specific naming methods are usually used to represent different carrier combinations. For example, "CA_3A-41A" represents a carrier aggregation combination with the B3 band as the primary carrier and the B41 band as the secondary carrier. In addition, OTA (Over The Air) refers to the spatial interface for transmitting signals wirelessly, which is an important reference for measuring the performance of wireless communication systems.

[0029] like Figure 2 As shown, the 5G signal processing circuit provided by the present invention includes an auxiliary carrier signal amplification unit 4 and a multiplexing filter unit. The auxiliary carrier signal amplification unit 4 is connected to the multiplexing filter unit. The multiplexing filter unit includes a B1 filter 6, a B5 filter 5, a B41 filter 7 and a B7 filter 8. Among them, the B1 filter 6 is used to process 2110-2170MHz frequency band signals, the B5 filter 5 is used to process 869-894MHz frequency band signals, the B41 filter 7 is used to process 2496-2690MHz frequency band signals, and the B7 filter 8 is used to process 2620-2690MHz frequency band signals. The B1 filter 6, the B5 filter 5, the B41 filter 7 and the B7 filter 8 all integrate sending and receiving functions.

[0030] The present invention further includes a signal processing unit 12, and the signal processing unit 12 is respectively connected to the auxiliary carrier signal amplifying unit 4. The signal processing unit 12 includes a first receiving port, a second receiving port, a third receiving port and a fourth receiving port. The first receiving port, the second receiving port, the third receiving port and the fourth receiving port are respectively connected to the B5 filter 5, the B1 filter 6, the B41 filter 7 and the B7 filter 8 through the auxiliary carrier signal amplifying unit 4.

[0031] Furthermore, the present invention further comprises a main carrier signal amplifying unit 11 , and the signal processing unit 12 further comprises a fifth receiving port, a sixth receiving port and a seventh receiving port, which are connected to the main carrier signal amplifying unit 11 .

[0032] Furthermore, the present invention further comprises an auxiliary carrier antenna 1 and an auxiliary carrier antenna switch 2, and the multiplexing filter unit is connected to the auxiliary carrier antenna 1 through the auxiliary carrier antenna switch 2. At the same time, it also comprises a full-band duplexer 9, a TX filter 10, a main carrier antenna 14 and a main carrier antenna switch 13, and the output end of the main carrier signal amplification unit 11 is connected to the main carrier antenna 14 through the full-band duplexer 9, the TX filter 10 and the main carrier antenna switch 13 in sequence.

[0033] In this embodiment, a multi-mode multi-frequency power amplifier 3 is further included, wherein the input end of the multi-mode multi-frequency power amplifier 3 is connected to the signal processing unit 12 , and the output end of the multi-mode multi-frequency power amplifier 3 is connected to the full-band duplexer 9 .

[0034] The working principle of the present invention is described below in conjunction with a specific working mode:

[0035] In NSA mode:

[0036] B1 filter (2110-2170MHz frequency band): As the main filter of NSA mode, it mainly processes the signal of LTE frequency band. When B1 is used as the main carrier, B1 filter 6 receives the 2110-2170MHz frequency band signal input from the auxiliary carrier antenna 1 through the auxiliary carrier antenna switch 2, filters the frequency band signal, and removes the out-of-band interference signal to ensure the purity of the received signal. The filtered signal is amplified by the auxiliary carrier signal amplification unit 4, and finally input to the second receiving port of the signal processing unit 12 for demodulation.

[0037] B5 filter (869-894MHz band): As a low-band filter, it processes 800MHz band signals. When using the B5 band, the B5 filter 5 receives the RF signal in the 869-894MHz band through the auxiliary carrier antenna switch 2 and performs bandpass filtering to retain the required band signal while suppressing interference from other bands. The filtered signal is amplified by the auxiliary carrier signal amplification unit 4 and then sent to the first receiving port of the signal processing unit 12 for subsequent processing.

[0038] B41 filter (2496-2690MHz frequency band): specially used to process TDD frequency band signals. In CA mode, when B41 is used as an auxiliary carrier, the B41 filter 7 receives the signal in the 2496-2690MHz frequency band and performs precise bandpass filtering to ensure the selectivity of the signal. The filtered signal is amplified by the auxiliary carrier signal amplification unit 4 and input to the third receiving port of the signal processing unit 12. Since B41 is a TDD frequency band, the filter needs to work in time division duplex mode, so it is also necessary to cooperate with timing control for transmission and reception switching.

[0039] B7 filter (2620-2690MHz frequency band): used to process high-frequency FDD frequency band signals. When the B7 frequency band signal needs to be processed, the B7 filter 8 receives the high-frequency signal of 2620-2690MHz through the auxiliary carrier antenna switch 2 and performs bandpass filtering to ensure the frequency selectivity of the signal. The filtered signal is also amplified by the auxiliary carrier signal amplification unit 4 and input to the fourth receiving port of the signal processing unit 12 for processing.

[0040] In transmit mode, these filters also function:

[0041] 1. When a signal is sent through the auxiliary carrier signal amplifying unit 4, the signal is first output from the corresponding port of the signal processing unit 12, and after being amplified by the auxiliary carrier signal amplifying unit 4, it is processed through the corresponding filter according to the required frequency band.

[0042] 2. When the transmitted signal passes through the filter, it can effectively suppress the out-of-band interference and harmonic components of the transmitted signal, ensuring the spectral purity of the transmitted signal.

[0043] 3. The filtered signal is finally switched to auxiliary carrier antenna 1 through auxiliary carrier antenna switch 2 for transmission.

[0044] The coordinated operation of these four filters realizes multiple working modes:

[0045] 1. NSA mode: mainly uses B1 filter to work with other frequency band filters

[0046] 2.CA mode: You can choose different frequency band combinations as needed

[0047] 3. Single-band mode: any filter can be used independently

[0048] This design not only achieves multi-band signal processing capabilities, but also simplifies the circuit structure, improves system integration, and reduces costs by integrating the sending and receiving functions. At the same time, since each filter is optimized for a specific frequency band, the efficiency and reliability of signal processing in each frequency band are ensured.

[0049] The 5G signal processing circuit provided by the present invention integrates the sending and receiving functions of the B1, B5, B41 and B7 filters by setting a multiplexed filtering unit, effectively reducing the design complexity of the circuit, reducing the number of components used, and thus reducing the overall design cost. At the same time, by optimizing the signal processing path, the signal transmission loss is reduced and the signal receiving and sending performance is improved.

[0050] In practical applications, the present invention can realize a variety of frequency band combinations. The following takes several typical combinations as examples to illustrate the specific working process of the present invention:

[0051] 1.B1+B41 combination working process

[0052] In the NSA combination mode of B1+B41, B1 (2110-2170MHz) is used as the LTE primary carrier and B41 (2496-2690MHz) is used as the 5G secondary carrier. The specific working process is as follows:

[0053] B1 signal processing: The B1 frequency band signal from the main carrier antenna 14 first passes through the main carrier antenna switch 13, is initially filtered by the full-band duplexer 9, and then is precisely band-pass filtered by the B1 filter 6 to filter out interference signals outside the 2110-2170MHz frequency band. The filtered signal is amplified by the auxiliary carrier signal amplification unit 4 and input to the second receiving port of the signal processing unit 12.

[0054] B41 signal processing: The B41 frequency band signal is received by the auxiliary carrier antenna 1, and is switched to the B41 filter 7 by the auxiliary carrier antenna switch 2, and is band-pass filtered in the 2496-2690MHz frequency band. Since B41 is a TDD frequency band, the signal is amplified by the auxiliary carrier signal amplification unit 4 after filtering, and is processed by the third receiving port of the signal processing unit 12 according to the timing requirements of time division duplexing.

[0055] 2.B5+B7 combination working process

[0056] In the B5+B7 CA combination mode, B5 (869-894MHz) and B7 (2620-2690MHz) can achieve carrier aggregation to increase data transmission rate. The specific working process is as follows:

[0057] B5 signal processing: B5 is used as a low-frequency main carrier, and receives 869-894MHz frequency band signals through the auxiliary carrier antenna 1, and switches to the B5 filter 5 for filtering through the auxiliary carrier antenna switch 2. The filtered signal is amplified by the auxiliary carrier signal amplification unit 4 and input to the first receiving port of the signal processing unit 12.

[0058] B7 signal processing: B7 acts as a high-frequency auxiliary carrier to receive 2620-2690MHz frequency band signals. The signal passes through the auxiliary carrier antenna 1 and the auxiliary carrier antenna switch 2, is band-pass filtered by the B7 filter 8, and then amplified by the auxiliary carrier signal amplification unit 4 before being input to the fourth receiving port of the signal processing unit 12.

[0059] Aggregation processing: The signal processing unit 12 performs carrier aggregation processing on the signals from B5 and B7 to achieve high-speed data transmission.

[0060] 3.B1+B41+B7 three-band combination processing method

[0061] The present invention also supports a three-band combination working mode. Taking the combination of B1+B41+B7 as an example, the specific processing method is as follows:

[0062] B1 main carrier processing: The B1 frequency band (2110-2170MHz) signal is received by the main carrier antenna 14, and after passing through the main carrier antenna switch 13 and the full-band duplexer 9, it is accurately filtered by the B1 filter 6. The filtered signal is processed by the auxiliary carrier signal amplification unit 4 and then input to the second receiving port of the signal processing unit 12.

[0063] B41 auxiliary carrier processing: The B41 frequency band (2496-2690MHz) signal is received by the auxiliary carrier antenna 1 and switched to the B41 filter 7 for filtering by the auxiliary carrier antenna switch 2. Since B41 is a TDD frequency band, it is necessary to switch between transmission and reception according to the time division duplex timing. The filtered signal is amplified by the auxiliary carrier signal amplification unit 4 and input to the third receiving port of the signal processing unit 12.

[0064] B7 auxiliary carrier processing: The B7 frequency band (2620-2690MHz) signal is also received by the auxiliary carrier antenna 1, and is switched to the B7 filter 8 for filtering by the auxiliary carrier antenna switch 2. The filtered signal is amplified by the auxiliary carrier signal amplification unit 4 and input to the fourth receiving port of the signal processing unit 12.

[0065] Multi-carrier coordination: The signal processing unit 12 coordinates the signals from the three frequency bands and achieves higher data throughput through carrier aggregation technology. During transmission, the multi-mode multi-frequency amplifier 3 can simultaneously process the transmission signals of multiple frequency bands, and transmit them after processing through the full-band duplexer 9 and the corresponding filters.

[0066] The flexible processing capability of this multi-band combination enables the present invention to adapt to various complex communication scenarios and provide better communication performance and user experience. By properly configuring the processing parameters of each frequency band, the signal quality and system performance can be optimized.

[0067] The present invention has been described in detail through the above specific embodiments, but it should be understood that the above contents are only illustrative and not intended to limit the scope of the present invention. A person of ordinary skill in the art may make various modifications and variations to the present invention according to specific application scenarios and actual needs without departing from the spirit and scope of the present invention, and these modifications and variations are all within the scope of protection of the present invention.

Claims

1. A multi-mode 5G signal processing circuit, characterized in that: include: Auxiliary carrier signal amplification unit and multiplexing filter unit; The auxiliary carrier signal amplifying unit is connected to the multiplexing filtering unit; The multiplex filtering unit comprises: B1 filter, used to process 2110-2170MHz frequency band signals; B5 filter, used to process 869-894MHz frequency band signals; B41 filter, used to process 2496-2690MHz frequency band signals; B7 filter, used to process 2620-2690MHz frequency band signals; The B1 filter, B5 filter, B41 filter and B7 filter all integrate sending and receiving functions.

2. The multi-mode 5G signal processing circuit according to claim 1, characterized in that: It also includes a signal processing unit, which is connected to the auxiliary carrier signal amplifying units respectively, and includes a first receiving port, a second receiving port, a third receiving port and a fourth receiving port.

3. The multi-mode 5G signal processing circuit according to claim 2, characterized in that: The first receiving port, the second receiving port, the third receiving port and the fourth receiving port are respectively connected to the B5 filter, the B1 filter, the B41 filter and the B7 filter through the auxiliary carrier signal amplifying unit.

4. The multi-mode 5G signal processing circuit according to claim 2, characterized in that: It also includes a main carrier signal amplifying unit, and the signal processing unit also includes a fifth receiving port, a sixth receiving port and a seventh receiving port, which are connected to the main carrier signal amplifying unit.

5. The multi-mode 5G signal processing circuit according to claim 4, characterized in that: Also included is an auxiliary carrier antenna and an auxiliary carrier antenna switch; The multiplex filtering unit is connected to the auxiliary carrier antenna through the auxiliary carrier antenna switch.

6. The multi-mode 5G signal processing circuit according to claim 5, characterized in that: It also includes a full-band duplexer, a TX filter, a main carrier antenna, and a main carrier antenna switch; The output end of the main carrier signal amplifying unit is connected to the main carrier antenna through the full-band duplexer, the TX filter and the main carrier antenna switch in sequence.

7. The multi-mode 5G signal processing circuit according to claim 6, characterized in that: It also includes a multi-mode multi-frequency power amplifier, the input end of which is connected to the signal processing unit, and the output end of which is connected to the full-band duplexer.

8. The multi-mode 5G signal processing circuit according to claim 1, characterized in that: The multiplexing filter unit is used to implement signal transmission and reception in NSA mode and CA mode.

9. The multi-mode 5G signal processing circuit according to claim 1, characterized in that: The B1 filter is used to process the LTE main carrier signal in the NSA mode and realize multi-frequency combination operation with other filters.

10. A communication device, characterized in that: Comprising a multi-mode 5G signal processing circuit as described in any one of claims 1-9.

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