5G communication and navigation integrated base station

Abstract

The utility model discloses a 5G communication and navigation integrated base station, which comprises a 5G digital processing module, a positioning baseband module, a clock synchronization module, a 5G core network, a clock module and a Transceiver module, the 5G core network is used for providing 5G I-path and Q-path baseband digital signals for the 5G digital processing module; the positioning baseband module sends the modulated TC-OFDM positioning signal to the 5G digital processing module; the 5G digital processing module is used for inputting 5G I-path and Q-path base band digital signals to the digital signal up-conversion DUC module, the DUC module carries out digital signal processing of interpolation filtering, frequency mixing superposition and up-conversion on the I and Q signals, an intermediate frequency IF signal with the same frequency as TCOFDM is output, the intermediate frequency IF signal and a TC-OFDM positioning signal are combined to generate a digital intermediate frequency signal, and the digital intermediate frequency signal is sent to the TC-OFDM positioning signal. And the signal is converted into a 5G common-band radio-frequency signal through the Transceiver module in an AD (Analog-to-Digital) mode to be transmitted. Accurate distance measurement and navigation positioning are realized, and conduction integration is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of 5G base station self-organizing network, and in particular to a 5G communication and navigation integrated base station. Background Art

[0002] At present, the global satellite navigation system can provide high-precision positioning services outdoors, but there are signal coverage blind spots in obstacle-blocked environments such as indoors, in mountainous areas, and underground. Relying solely on GNSS for positioning is difficult to meet the needs of ubiquitous high-precision communication and navigation applications.

[0003] With the continuous development of communication and navigation technology, the theory of communication and navigation integration is becoming more and more mature. Communication, navigation and positioning technologies based on wireless local area networks such as Bluetooth, Wi-Fi, and ultra-wideband (UWB) have become the mainstream of communication and navigation integration. Relying on independent positioning equipment, it can provide meter-level or even centimeter-level positioning accuracy in a small range. However, achieving coverage in a large urban area will face extremely high network construction costs, making it difficult to become the main means of ubiquitous high-precision indoor and outdoor positioning and navigation.

[0004] Based on the mobile communication network, mobile communication network positioning technology has become a hot topic in the field of positioning and navigation due to the high availability, anti-interference and networking flexibility of the ground base station network. Mobile communication network positioning technology relies on the telecommunications operator network to obtain spatiotemporal information, saving the cost of building a dedicated positioning network. However, in the 2G, 3G, and 4G eras, the positioning error is as high as ten meters or even hundreds of meters, and it is impossible to provide high-precision spatiotemporal information.

[0005] With the advent of the 5G era and the gradual improvement of 5G networks, the 5G New Radio (HR) network standard has many inherent advantages in communication, navigation, and integrated positioning, such as large bandwidth, ultra-dense networking, and large-scale antenna arrays, which provide strong support for 5G communication, navigation, and integration as well as the improvement of positioning accuracy.

[0006] In response to the mobile network's application requirements for high-precision positioning and navigation indoors and outdoors, 5G signals have been added with PRS signals specifically used for positioning. However, in order to ensure the capacity of the communication system and the quality of the mobile communication network, the PRS positioning signal should not occupy too many resources in the frequency band. PRS is designed to be broadcast in a very short period, so the terminal cannot track its signal, resulting in its ranging accuracy being severely limited. Utility Model Content

[0007] In view of the above-mentioned deficiencies in the prior art, the utility model provides a 5G communication and navigation integrated base station.

[0008] The utility model provides a 5G communication and navigation integrated base station, comprising:

[0009] The clock module is used to provide 1PPS and 10M high-precision synchronous clock signals for the clock synchronization module;

[0010] A clock synchronization module is used to receive 1PPS and 10M high-precision synchronous clock signals sent by the clock module. The clock synchronization module provides 1PPS and 10M high-precision synchronous clock signals to the 5G digital processing module and the positioning baseband module through optical fiber;

[0011] The Transceiver module is used to receive the RF signal from the antenna through the receiving channel. After filtering and amplification, the RF signal is down-converted using zero intermediate frequency technology, and then sent to the 5G digital processing module for processing after analog-to-digital conversion to 5G digital signals;

[0012] 5G core network, used to provide 5G I (In-Phase) and Q (Quadrature) digital signals to the 5G digital processing module through the CPRI interface;

[0013] The positioning baseband module sends the modulated TC-OFDM (Time Code-Orthogonal Frequency Division Multiplexing) positioning signal to the 5G digital processing module through the Serdes interface;

[0014] The 5G digital processing module is used to input the 5G I-channel and Q-channel digital signals into the DUC module. The DUC module performs digital signal processing such as interpolation filtering, mixing and superposition, and up-conversion on the I and Q signals, and outputs an intermediate frequency IF signal with the same frequency as TC_OFDM. The intermediate frequency IF signal is combined with the TC-OFDM positioning signal to generate a digital intermediate frequency signal, and is converted into a 5G common frequency band RF signal through the Transceiver module AD conversion for transmission; the 5G common frequency band RF signal is a signal generated by the TC-OFDM positioning signal when it is embedded in the background noise of the 5G communication signal and networked in the same frequency as the 5G communication base station.

[0015] In some embodiments, the 5G digital processing module converts the digital signal sent by the 5G core network into a radio frequency signal through the transceiver module to achieve wireless coverage of the 5G signal; at the same time, the transceiver module receives the uplink radio frequency signal from the antenna through the receiving channel, and after filtering and amplification, uses zero intermediate frequency technology to down-convert the filtered and amplified radio frequency signal, and sends the digital intermediate frequency signal converted from analog to digital to the 5G digital processing module. The 5G digital processing module performs frequency conversion processing on the intermediate frequency signal to generate a low frequency signal, and then the 5G digital processing module sends the low frequency signal to the 5G core network for 5G communication information processing.

[0016] In some embodiments, the 5G digital processing module is also used to perform system configuration of the frequency, synchronization mode, spread spectrum code, and power information of the positioning signal transmission through the SPI interface.

[0017] In some embodiments, the 5G core network is used for 5G complete protocol stack processing to generate digital signals and network management of 5G channel-integrated base station equipment, and sends digital signals to the 5G digital processing module.

[0018] In some embodiments, the 5G core network includes a network management system of the 5G core network,

[0019] The network management system of the 5G core network upgrades and configures the integrated base station through the M-plane of 5G CPRI.

[0020] In some embodiments,

[0021] The base station's working status, software and hardware version information, location information, ambient air pressure and temperature information are returned to the network management system of the 5G core network through the uplink channel to achieve remote monitoring.

[0022] In some embodiments, the clock module includes: a wireless clock source clock or an optical fiber clock source clock.

[0023] In some embodiments, the clock module is an external clock source.

[0024] In some embodiments, the clock synchronization module enables the 1PPS clock synchronization accuracy between modules to reach 0.5ns.

[0025] In some embodiments, the TC_OFDM positioning signal is 20db lower than the 5G communication signal power.

[0026] The TC-OFDM positioning signal adopted by the 5G communication and navigation integrated base station provided in the utility model is aimed at the military application and industrial application requirements of 5G communication and high-precision indoor positioning and navigation. The 5G communication and navigation integrated base station adopts a co-frequency method with the 5G communication base station to form a network, embed the positioning signal in the background noise of the 5G communication signal, and realize the high-precision navigation and positioning function on the basis of meeting the 5G communication requirements, realize the co-frequency co-carrying of CDMA mobile communication signals and TC-OFDM positioning signals, and realize the continuous capture and tracking of positioning signals during communication, thereby realizing accurate ranging and navigation positioning, and realizing communication and navigation integration. For the 5G communication and navigation integrated terminal, receiving the above-mentioned mixed signal can both communicate and realize positioning. The 5G positioning terminal can receive the communication and navigation integrated signal downlinked from the base station, perform correlation operation with the locally generated TC positioning PN code, and determine the time of signal arrival according to the position of the correlation peak, thereby realizing the positioning and real-time tracking of the 5G communication and navigation integrated terminal and the base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the 5G communication and navigation integrated base station provided by the utility model. DETAILED DESCRIPTION

[0028] Example embodiments will be described more fully below with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make the present invention thorough and complete and to enable those skilled in the art to fully understand the scope of the present invention.

[0029] In the absence of conflict, the features of the present invention and its embodiments may be combined with each other.

[0030] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] The terms used herein are only used to describe specific embodiments and are not intended to limit the present invention. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, the existence of the features, wholes, steps, operations, elements and / or components is specified, but the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof is not excluded.

[0032] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be understood to have meanings consistent with their meanings in the context of the relevant technology and the present invention, and will not be understood to have idealized or overly formal meanings unless explicitly defined herein.

[0033] In order to enable technicians in this field to better understand the technical solution, a 5G communication and navigation integrated base station provided by the utility model is described in detail below with reference to the accompanying drawings.

[0034] The utility model provides a 5G communication and navigation integrated base station, including: a 5G digital processing module, a positioning baseband module, a clock synchronization module, a 5G core network, a clock module, and a Transceiver radio transceiver module;

[0035] The clock module is used to provide 1PPS and 10M high-precision synchronous clock signals for the clock synchronization module;

[0036] A clock synchronization module is used to receive 1PPS and 10M high-precision synchronous clock signals sent by the clock module. The clock synchronization module provides 1PPS and 10M high-precision synchronous clock signals to the 5G digital processing module and the positioning baseband module through optical fiber;

[0037] The Transceiver module is used to receive the RF signal from the antenna through the receiving channel. After filtering and amplification, the RF signal is down-converted using zero intermediate frequency technology, and then sent to the 5G digital processing module for processing after analog-to-digital conversion to 5G digital signals;

[0038] 5G core network, used to provide 5G digital signals to the 5G digital processing module through the CPRI interface;

[0039] The positioning baseband module sends the modulated TC-OFDM code division orthogonal frequency division multiplexing positioning signal to the 5G digital processing module through the Serdes interface;

[0040] The 5G digital processing module is used to input the 5G I-channel and Q-channel digital signals into the digital signal up-conversion DUC module. The DUC module performs digital signal processing such as interpolation filtering, mixing and superposition, and up-conversion on the I and Q signals, and outputs an intermediate frequency IF signal with the same frequency as TC_OFDM. The intermediate frequency IF signal is combined with the TC-OFDM positioning signal to generate a digital intermediate frequency signal, and is converted into a 5G common frequency band RF signal through the Transceiver module AD for transmission; the 5G common frequency band RF signal is a signal generated by the TC-OFDM positioning signal when it is embedded in the background noise of the 5G communication signal and networked in the same frequency as the 5G communication base station.

[0041] Aiming at the problems of low positioning accuracy, small signal coverage, and high construction cost of dedicated positioning network of wireless network communication and navigation equipment on the market, the utility model proposes a 5G communication and navigation integrated base station.

[0042] The positioning baseband module in the utility model is used to generate the I / Q intermediate frequency IF digital signal of the positioning baseband TC-OFDM, and send it to the 5G digital processing module through the Serdes interface. TC_OFDM positioning signal is a ground equipment positioning signal that can generate a stronger radio signal than GPS and BD in a local area, and the signal does not propagate through the ionosphere. With high-precision clock synchronization, it can effectively improve the positioning accuracy in the horizontal direction.

[0043] The TC-OFDM positioning signal adopted by the 5G communication and navigation integrated base station provided in the utility model is aimed at the military application and industrial application requirements of 5G communication and high-precision indoor positioning and navigation. The 5G communication and navigation integrated base station adopts the network in the way of sharing the frequency with the 5G communication base station, embeds the positioning signal in the background noise of the 5G communication signal, and realizes the high-precision navigation and positioning function on the basis of meeting the 5G communication requirements. The intermediate frequency IF signal and the TC-OFDM positioning signal are combined to generate a digital intermediate frequency signal, which is a communication and navigation integrated digital signal, realizing the co-frequency sharing of CDMA (Code Division Multipul Access) mobile communication signal and TC-OFDM positioning signal, and realizing continuous capture and tracking of positioning signals during communication, thereby realizing accurate ranging and navigation positioning, and realizing communication and navigation integration. At the same time, the clock is synchronized by the clock module and the clock synchronization module. For the 5G communication and navigation integrated terminal, receiving the above-mentioned mixed signal can both communicate and realize positioning. The 5G positioning terminal can receive the integrated communication and navigation signal downlinked from the base station, perform correlation operations with the locally generated TC positioning PN code, and determine the time of signal arrival based on the position of the correlation peak, thereby realizing the positioning and real-time tracking of the 5G integrated communication and navigation terminal and the base station.

[0044] In some embodiments, the 5G digital processing module converts the digital signal sent by the 5G core network into a radio frequency signal through the transceiver module to achieve wireless coverage of the 5G signal; at the same time, the transceiver module receives the uplink radio frequency signal from the antenna through the receiving channel, and after filtering and amplification, uses zero intermediate frequency technology to down-convert the filtered and amplified radio frequency signal, and sends the digital intermediate frequency signal converted from analog to digital to the 5G digital processing module. The 5G digital processing module performs frequency conversion processing on the intermediate frequency signal to generate a low frequency signal, and then the 5G digital processing module sends the low frequency signal to the 5G core network for 5G communication information processing.

[0045] In some embodiments, the 5G digital processing module is also used to perform system configuration of the frequency, synchronization mode, spread spectrum code, and power information of the positioning signal transmission through the SPI interface.

[0046] In the utility model, the 5G digital processing module realizes the wireless signal coverage and radio frequency front-end processing of the 5G base station.

[0047] In some embodiments, the 5G core network is used for 5G complete protocol stack processing to generate digital signals and network management of 5G channel-integrated base station equipment, and sends digital signals to the 5G digital processing module.

[0048] In some embodiments, the 5G core network includes a network management system of the 5G core network,

[0049] The network management system of the 5G core network upgrades and configures the integrated base station through the M-plane of 5G CPRI.

[0050] In some embodiments,

[0051] The base station's working status, software and hardware version information, location information, ambient air pressure and temperature information are returned to the network management system of the 5G core network through the uplink channel to achieve remote monitoring.

[0052] In some embodiments, the clock module includes: a wireless clock source clock or an optical fiber clock source clock.

[0053] In some embodiments, the clock module is an external clock source.

[0054] In some embodiments, the positioning signal baseband module clock and the 5G digital processing module clock are provided by an independent optical fiber synchronization module or an external wireless clock synchronization module. The clock synchronization module enables the 1PPS clock synchronization accuracy between modules to reach 0.5ns.

[0055] In some embodiments, the TC_OFDM positioning signal is 20db lower than the 5G communication signal power.

[0056] In the utility model, the TC_OFDM positioning signal is 20db lower than the 5G communication signal power and is embedded in the background noise of the 5G communication signal. It can be flexibly configured to realize intermittent or continuous positioning signal broadcasting mode without affecting the communication capability, and realize the co-frequency co-carrying and co-time multiplexing of communication and positioning signals. It can perform beacon-like short-time signal broadcasting, and intermittent broadcasting of short-period signals. In addition, for the long-term continuous broadcasting of long-period positioning signals, the broadcasting time is long, which supports the continuous tracking of the terminal to the positioning signal, thereby improving the positioning and navigation accuracy.

[0057] The advantages of the 5G communication and navigation integrated base station provided by the utility model are reflected in:

[0058] 1) High positioning accuracy and wide coverage: The positioning signal broadcast time is long, which can support the terminal to continuously track the positioning signal, thereby improving the positioning and navigation accuracy. It can achieve sub-meter positioning in local areas (below 20m) or wide areas (below 5km);

[0059] 2) Less resource occupation and low network cost: Relying on the 5G mobile communication network to achieve high-precision positioning, there is no need to build a dedicated network separately and does not occupy independent spectrum resources;

[0060] 3) Low signal power: The signal power is less than the background noise of the communication signal and much lower than the power required for independent broadcasting;

[0061] 4) High security: The positioning signal is hidden under the background noise of the communication signal and is difficult to be detected and monitored by a third party.

[0062] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted only as generally illustrative, and not for limiting purposes. In some embodiments, it will be apparent to those skilled in the art that, unless otherwise expressly stated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone, or may be used in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the scope of the present invention as set forth in the appended claims.

Claims

1. A 5G communication and navigation integrated base station, characterized in that: include: 5G digital processing module, positioning baseband module, clock synchronization module, 5G core network, clock module, Transceiver radio transceiver module; The clock module is used to provide 1PPS and 10M high-precision synchronous clock signals for the clock synchronization module; A clock synchronization module is used to receive 1PPS and 10M high-precision synchronous clock signals sent by the clock module. The clock synchronization module provides 1PPS and 10M high-precision synchronous clock signals to the 5G digital processing module and the positioning baseband module through optical fiber; 5G core network, used to provide 5G in-phase I-channel and orthogonal Q-channel digital signals to the 5G digital processing module through the CPRI interface; The positioning baseband module sends the modulated TC-OFDM code division orthogonal frequency division multiplexing positioning signal to the 5G digital processing module through the Serdes interface; The 5G digital processing module is used to input the 5G I-channel and Q-channel digital signals into the digital signal up-conversion DUC module. The DUC module performs digital signal processing such as interpolation filtering, mixing and superposition, and up-conversion on the I and Q signals, and outputs an intermediate frequency IF signal with the same frequency as TC_OFDM. The intermediate frequency IF signal is combined with the TC-OFDM positioning signal to generate a digital intermediate frequency signal, and is converted into a 5G common frequency band RF signal through the Transceiver module AD for transmission; the 5G common frequency band RF signal is a signal generated by the TC-OFDM positioning signal when it is embedded in the background noise of the 5G communication signal and networked in the same frequency as the 5G communication base station.

2. The 5G communication and navigation integrated base station according to claim 1, characterized in that: The 5G digital processing module converts the digital signal sent by the 5G core network into a radio frequency signal through the Transceiver module to achieve wireless coverage of the 5G signal. At the same time, the Transceiver module receives the uplink radio frequency signal from the antenna through the receiving channel, and after filtering and amplification, it uses zero intermediate frequency technology to down-convert the filtered and amplified radio frequency signal, and sends the digital intermediate frequency signal converted from analog to digital to the 5G digital processing module. The 5G digital processing module performs frequency conversion processing on the intermediate frequency signal to generate a low-frequency signal, and then the 5G digital processing module sends the low-frequency signal to the 5G core network for 5G communication information processing.

3. The 5G communication and navigation integrated base station according to claim 1, characterized in that: The 5G digital processing module is also used to configure the frequency, synchronization mode, spread spectrum code, and power information of the positioning signal transmission through the SPI interface.

4. The 5G communication and navigation integrated base station according to claim 1, characterized in that: The 5G core network is also used to process and generate digital signals for the 5G complete protocol stack, as well as for network management of 5G channel-integrated base station equipment, and to send digital signals to the 5G digital processing module.

5. The 5G communication and navigation integrated base station according to claim 1, characterized in that: The 5G core network includes the 5G core network network management system. The network management system of the 5G core network upgrades and configures the integrated base station through the M-plane of 5G CPRI.

6. The 5G communication and navigation integrated base station according to claim 5, characterized in that: The base station's working status, software and hardware version information, location information, ambient air pressure and temperature information are returned to the network management system of the 5G core network through the uplink channel to achieve remote monitoring.

7. The 5G communication and navigation integrated base station according to claim 1, characterized in that: The clock module includes: a wireless clock source clock or an optical fiber clock source clock.

8. The 5G communication and navigation integrated base station according to claim 7, characterized in that: The clock module is an external clock source.

9. The 5G communication and navigation integrated base station according to claim 8, characterized in that: The clock synchronization module enables the 1PPS clock synchronization accuracy between modules to reach 0.5ns.

10. The 5G communication and navigation integrated base station according to claim 1, characterized in that: The TC_OFDM positioning signal is 20db lower than the 5G communication signal power.

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