A sub-band controllable remote backhaul system

Abstract

This invention provides a subband controllable remote backhaul system, including a near-end unit and a far-end unit. The near-end unit includes a receiving antenna, a first duplexer, a first downlink, and a first uplink. The far-end unit includes a retransmission antenna, a second duplexer, a second downlink, and a second uplink. The receiving antenna is connected to the first duplexer, and the retransmission antenna is connected to the second duplexer. This technical solution enables control of subband signals, and then combines, frames, and electro-optically converts each subband signal into a digital optical signal, which is transmitted to the far-end unit via optical fiber. After deframing, the far-end unit restores the signal to a downlink broadband wireless signal, which is then amplified to complete coverage of the coverage area.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication technology, and in particular to a sub-band controllable remote backhaul system. Background Technology

[0002] With the increasing number of co-construction and sharing scenarios, the demand for broadband multimode equipment is growing. A sub-band controllable remote backhaul system adopts air coupling and fiber optic remote transmission, which allows for more flexible source selection, broadband amplification, and adjustable and controllable sub-band signals within the broadband range. This provides a wider range of application scenarios, a shorter construction cycle, a simple system structure, and low cost, offering a new solution for co-construction and sharing application scenarios. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a sub-band controllable remote backhaul system, which realizes the control of sub-band signals, and then combines, frames, and electro-optically converts each sub-band signal into a digital optical signal, which is transmitted to the remote unit through optical fiber. After the remote unit deframes the signal, it restores it to a downlink broadband wireless signal, which is then amplified by power to complete the coverage of the coverage area.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a subband controllable remote backhaul system, comprising a near-end unit and a far-end unit; the near-end unit includes a receiving antenna, a first duplexer, a first downlink, and a first uplink; the far-end unit includes a retransmission antenna, a second duplexer, a second downlink, and a second uplink; the receiving antenna is connected to the first duplexer, and the retransmission antenna is connected to the second duplexer.

[0005] In a preferred embodiment: The first downlink includes a downlink low-noise amplifier, a first downconverter module, an analog-to-digital converter module (ADC1), a downlink digital frequency selective filter module, multiple first subbands, a downlink subband power adjustment module, multiple first subband switches, a downlink digital combiner, and a first electro-optical conversion module. The downlink low-noise amplifier is connected to the first duplexer. The downlink low-noise amplifier, the first downconverter module, the ADC1, the downlink digital frequency selective filter module, the multiple first subbands, the downlink subband power adjustment module, the first subband switches, the downlink digital combiner, and the first electro-optical conversion module are connected sequentially. The first subbands and the first subband switches correspond one-to-one.

[0006] In a preferred embodiment: The second downlink includes a first optoelectronic conversion module, a digital-to-analog conversion module DAC1, a first upconversion module, and a downlink wideband power amplifier module; the first optoelectronic conversion module, the digital-to-analog conversion module DAC1, the first upconversion module, and the downlink wideband power amplifier module are connected in sequence, and the downlink wideband power amplifier module is connected to the second duplexer.

[0007] In a preferred embodiment: The second uplink includes an uplink low-noise amplifier, a second downconverter module, an analog-to-digital converter module (ADC2), and a second electro-optical converter module; the uplink low-noise amplifier, the second downconverter module, the ADC2 module, and the second electro-optical converter module are connected in sequence; the uplink low-noise amplifier is connected to the second duplexer.

[0008] In a preferred embodiment: The first uplink includes a second photoelectric conversion module, an uplink digital frequency selective filter module, multiple second subbands, an uplink subband power adjustment module, multiple second subband switches, an uplink digital combiner, a digital-to-analog converter module DAC2, a second upconverter module, and an uplink wideband power amplifier module; the second photoelectric conversion module, the uplink digital frequency selective filter module, the multiple second subbands, the uplink subband power adjustment module, the multiple second subband switches, the uplink digital combiner, the digital-to-analog converter module DAC2, the second upconverter module, and the uplink wideband power amplifier module are connected in sequence; the uplink wideband power amplifier module is connected to the first duplexer; the second subbands and the second subband switches correspond one-to-one.

[0009] Compared with the prior art, this utility model has the following advantages: This utility model adopts air coupling and fiber optic remote transmission, which allows for flexible source selection. It provides a sub-band controllable remote transmission system. The receiving antenna uses air coupling to receive downlink broadband wireless signals, then decomposes the broadband downlink signal into sub-bands of different frequency bands. Power adjustment is applied to the sub-bands, and a sub-band switch is added to control the sub-band signals. The signals from each sub-band are then combined to reconstruct the downlink broadband wireless signal, which is then amplified via fiber optic remote transmission to complete coverage of the coverage area. The retransmitting antenna uses air coupling to receive uplink broadband wireless signals, then decomposes the broadband uplink signal into sub-bands of different frequency bands. Power adjustment is applied to the sub-bands, and a sub-band switch is added to control the sub-band signals. The signals from each sub-band are then combined to reconstruct the uplink broadband wireless signal, which is then amplified via fiber optic remote transmission and transmitted back to the source device. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0013] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application; as used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise; furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0014] A sub-band controllable remote backhaul system, reference Figure 1 The device includes a near-end unit and a far-end unit; the near-end unit includes a receiving antenna, a first duplexer, a first downlink, and a first uplink; the far-end unit includes a retransmit antenna, a second duplexer, a second downlink, and a second uplink; the receiving antenna is connected to the first duplexer, and the retransmit antenna is connected to the second duplexer.

[0015] The first downlink includes a downlink low-noise amplifier, a first downconverter module, an analog-to-digital converter (ADC1), a downlink digital frequency selective filter module, multiple first subbands, a downlink subband power adjustment module, multiple first subband switches, a downlink digital combiner, and a first electro-optical conversion module. The downlink low-noise amplifier is connected to the first duplexer. The downlink low-noise amplifier, the first downconverter module, the ADC1, the downlink digital frequency selective filter module, the multiple first subbands, the downlink subband power adjustment module, the first subband switches, the downlink digital combiner, and the first electro-optical conversion module are connected sequentially. Each first subband corresponds one-to-one with a first subband switch. In this embodiment, it includes three first subbands and three first subband switches.

[0016] The second downlink includes a first optoelectronic conversion module, a digital-to-analog conversion module DAC1, a first upconversion module, and a downlink wideband power amplifier module; the first optoelectronic conversion module, the digital-to-analog conversion module DAC1, the first upconversion module, and the downlink wideband power amplifier module are connected in sequence, and the downlink wideband power amplifier module is connected to the second duplexer.

[0017] The second uplink includes an uplink low-noise amplifier, a second downconverter module, an analog-to-digital converter module (ADC2), and a second electro-optical converter module; the uplink low-noise amplifier, the second downconverter module, the ADC2 module, and the second electro-optical converter module are connected in sequence; the uplink low-noise amplifier is connected to the second duplexer.

[0018] The first uplink includes a second photoelectric conversion module, an uplink digital frequency selective filter module, multiple second subbands, an uplink subband power adjustment module, multiple second subband switches, an uplink digital combiner, a digital-to-analog converter module DAC2, a second upconverter module, and an uplink wideband power amplifier module. The second photoelectric conversion module, the uplink digital frequency selective filter module, the multiple second subbands, the uplink subband power adjustment module, the multiple second subband switches, the uplink digital combiner, the digital-to-analog converter module DAC2, the second upconverter module, and the uplink wideband power amplifier module are connected sequentially. The uplink wideband power amplifier module is connected to the first duplexer. Each second subband corresponds to one of the second subband switches. In this embodiment, it includes three second subbands and three second subband switches.

[0019] An operation method for a subband controllable remote backhaul system, comprising a downlink operation method and an uplink operation method; Downlink Operation Method: The receiving antenna receives the downlink broadband wireless signal in an empty-coupled manner. After broadband filtering by the first duplexer, it enters the downlink low-noise amplifier for low-noise amplification and then enters the first downconversion module. It is downconverted to intermediate frequency or zero frequency and then enters the analog-to-digital converter (ADC1) to convert it into a downlink broadband digital signal, which enters the downlink digital frequency selective filtering module. The downlink digital frequency selective filtering module decomposes the downlink broadband digital signal into multiple first sub-bands according to actual needs. For example, the FDD1800 downlink broadband signal is 1805-1880MHz. Based on the operator, it is decomposed into first sub-band 1 (China Mobile) 1805-1830MHz, first sub-band 2 (China Unicom) 1830-1860MHz, and first sub-band 3 (China Telecom) 1860-1880MHz. These multiple first sub-bands enter the downlink sub-band power adjustment module, which adjusts the power level of each first sub-band. In the empty-coupled state, the received signal levels from different operators are inconsistent. After adjustment by the sub-band power adjustment module, the power levels of each sub-band are consistent. The first sub-band after gain adjustment enters the downlink digital combiner through the first sub-band switch. The first sub-band switch opens or closes the first sub-band signal according to actual needs. The downlink digital combiner combines all the incoming first sub-band signals into a downlink broadband digital signal. The combined downlink broadband digital signal is framed according to the CPRI protocol. The framed downlink digital signal enters the first electro-optical conversion module and is converted into a downlink digital optical signal, which is transmitted to the remote unit via optical fiber. The remote unit receives the downlink digital optical signal transmitted from the near unit and converts it into a downlink digital signal through the first opto-optical conversion module. After deframing the downlink digital signal, it is converted into an intermediate frequency downlink broadband wireless signal by the digital-to-analog converter module DAC1 and enters the first upconversion module. The upconverted downlink broadband wireless signal is amplified by the downlink broadband power amplifier module and enters the second duplexer. The second duplexer filters the signal and completes signal coverage through the retransmission antenna. Uplink Operation Method: The retransmit antenna receives the uplink broadband wireless signal in an air-coupled manner. After broadband filtering by the second duplexer, it enters the uplink low-noise amplifier for low-noise amplification and then enters the second downconversion module. It is downconverted to intermediate frequency or zero frequency and then enters the analog-to-digital converter (ADC2) to convert it into an uplink broadband digital signal. The combined uplink broadband digital signal is framed according to the CPRI protocol. The framed uplink digital signal enters the second electro-optical conversion module to convert it into an uplink digital optical signal, which is transmitted via optical fiber to the near-end unit. The near-end unit receives the uplink digital optical signal and converts it into an uplink digital signal through the second opto-optical conversion module. After deframing, the uplink digital signal enters the uplink digital frequency selective filtering module, which decomposes the uplink broadband digital signal into multiple second sub-bands according to actual needs. For example, the FDD1800 uplink broadband signal 1710-1785MHz is decomposed according to the operator, into second sub-band 1 (China Mobile) 1710-1735MHz. Sub-band 2 (China Unicom) 1735-1765MHz, sub-band 3 (China Telecom) 1765-1785MHz. Multiple sub-bands enter the uplink sub-band power adjustment module to adjust the power level of each sub-band. When uncoupled, the signal levels of the received operators are inconsistent. After adjustment by the downlink sub-band power adjustment module, the power levels of each sub-band are consistent. After gain adjustment, the multiple sub-bands enter the uplink digital combiner through the sub-band switch. The sub-band switch opens or closes the sub-band signal according to actual needs. The uplink digital combiner combines all the incoming sub-band signals into an uplink broadband digital signal. The combined uplink broadband digital signal enters the digital-to-analog converter module DAC2. After digital-to-analog conversion, it enters the intermediate frequency uplink broadband wireless signal and enters the second upconversion module. After upconversion, the uplink broadband wireless signal is amplified by the uplink broadband power amplifier module and enters the first duplexer. The first duplexer filters and transmits the signal back to the source device through the receiving antenna.

Claims

1. A sub-band manageable reach back backhaul system, characterized by: It includes a near-end unit and a far-end unit; the near-end unit includes a receiving antenna, a first duplexer, a first downlink, and a first uplink; the far-end unit includes a retransmit antenna, a second duplexer, a second downlink, and a second uplink; the receiving antenna is connected to the first duplexer, and the retransmit antenna is connected to the second duplexer.

2. The sub-band controllable remote transmission system according to claim 1, characterized in that: The first downlink includes a downlink low-noise amplifier, a first downconverter module, an analog-to-digital converter module (ADC1), a downlink digital frequency selective filter module, multiple first subbands, a downlink subband power adjustment module, multiple first subband switches, a downlink digital combiner, and a first electro-optical conversion module. The downlink low-noise amplifier is connected to the first duplexer. The downlink low-noise amplifier, the first downconverter module, the ADC1, the downlink digital frequency selective filter module, the multiple first subbands, the downlink subband power adjustment module, the first subband switches, the downlink digital combiner, and the first electro-optical conversion module are connected sequentially. The first subbands and the first subband switches correspond one-to-one.

3. The sub-band controllable remote transmission system according to claim 2, characterized in that: The second downlink includes a first optoelectronic conversion module, a digital-to-analog conversion module DAC1, a first upconversion module, and a downlink wideband power amplifier module; the first optoelectronic conversion module, the digital-to-analog conversion module DAC1, the first upconversion module, and the downlink wideband power amplifier module are connected in sequence, and the downlink wideband power amplifier module is connected to the second duplexer.

4. The sub-band controllable remote transmission system according to claim 3, characterized in that: The second uplink includes an uplink low-noise amplifier, a second downconverter module, an analog-to-digital converter module (ADC2), and a second electro-optical converter module; the uplink low-noise amplifier, the second downconverter module, the ADC2 module, and the second electro-optical converter module are connected in sequence; the uplink low-noise amplifier is connected to the second duplexer.

5. The sub-band controllable remote transmission system according to claim 4, characterized in that: The first uplink includes a second photoelectric conversion module, an uplink digital frequency selective filter module, multiple second subbands, an uplink subband power adjustment module, multiple second subband switches, an uplink digital combiner, a digital-to-analog converter module DAC2, a second upconverter module, and an uplink wideband power amplifier module; the second photoelectric conversion module, the uplink digital frequency selective filter module, the multiple second subbands, the uplink subband power adjustment module, the multiple second subband switches, the uplink digital combiner, the digital-to-analog converter module DAC2, the second upconverter module, and the uplink wideband power amplifier module are connected in sequence; the uplink wideband power amplifier module is connected to the first duplexer; the second subbands and the second subband switches correspond one-to-one.

Images