CN111641573B - Multichannel DFE digital communication system and 5G signal return system - Google Patents
Multichannel DFE digital communication system and 5G signal return system Download PDFInfo
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- CN111641573B CN111641573B CN202010436426.7A CN202010436426A CN111641573B CN 111641573 B CN111641573 B CN 111641573B CN 202010436426 A CN202010436426 A CN 202010436426A CN 111641573 B CN111641573 B CN 111641573B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a multichannel DFE digital communication system and a 5G signal return system, which comprise a digital front end, wherein the digital front end comprises an uplink channel and a downlink channel; the uplink path comprises a plurality of uplink channels, and each uplink channel comprises an uplink Nyquist filtering module, an uplink interpolation module, an uplink post-interpolation filtering module, an uplink DUC and an uplink digital conversion module which are arranged in sequence; the downlink channel comprises a plurality of downlink channels, and each downlink channel comprises a downlink Nyquist filter module, a downlink extraction module, a downlink pre-extraction filter module, a downlink DDC and a downlink digital conversion module which are sequentially arranged. The multichannel DFE digital communication can be realized, intersymbol interference of a system is reduced, and the bandwidth utilization rate of a return system is improved.
Description
Technical Field
The invention relates to the field of 5G high-speed communication, in particular to a multichannel DFE digital communication system and a 5G signal return system.
Background
For 5G bearer networks, there are forward transmission, intermediate transmission and return transmission. As shown in fig. 1, the 5G base station is reconfigured into three parts, namely an AAU part, a DU part and a CU part, and the DU part and the CU part can be deployed together or separately according to specific scenarios and requirements, and so-called retransmission is increased when the DU part and the CU part are deployed separately. Data transmission between the AAU and the DU is forward transmission, data transmission between the DU and the CU is intermediate transmission, and the part of the CU accessing the core network is return transmission.
Backhaul techniques typically employ wireless backhaul and fiber optic backhaul. Most of China uses optical fiber return, and wireless return is used only in a few emergency scenes. The reason is that the optical fiber return reliability is stronger than that of wireless and the cost is not high, but for laying communication optical fiber in a large area, the greatest cost is the labor cost and the land use cost. However, in the 5G era, the cost of all-fiber networking is hard for operators to bear under the demand of high-density networking.
With the coming of the global information age, the total amount of data is explosively increased, and the demand of people for data information is increasing. The microwave can be used as an important solution for mobile backhaul, is expected to replace or supplement optical fibers, solves the problem of optical fiber shortage, and realizes the rapid deployment of an LTE network. However, the traditional microwave frequency band (6-42 GHz) is short in spectrum resources, the channel interval is small (the current maximum channel interval in China is 28MHz), and the requirement of an LTE base station for a large bandwidth of a bearer network is difficult to meet.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a multichannel DFE digital communication system and a 5G signal backhaul system, which can implement multichannel DFE digital communication, reduce intersymbol interference of the system, and improve the bandwidth utilization rate of the backhaul system.
In order to solve the above technical problem, the present invention provides a multichannel DFE digital communication system, comprising a digital front end, wherein the digital front end comprises an uplink path and a downlink path;
the uplink path comprises a plurality of uplink channels, and each uplink channel comprises an uplink Nyquist filtering module, an uplink interpolation module, an uplink post-interpolation filtering module, an uplink DUC and an uplink digital conversion module which are arranged in sequence;
the downlink channel comprises a plurality of downlink channels, and each downlink channel comprises a downlink Nyquist filter module, a downlink extraction module, a filter module before downlink extraction, a downlink DDC and a downlink digital conversion module which are arranged in sequence.
Preferably, the uplink nyquist filtering module and the downlink nyquist filtering module are both used for adjusting the code pattern of the system, so that the nyquist theorem can be satisfied by the system as a whole to reduce the intersymbol interference of the system.
Preferably, the uplink interpolation module is configured to reduce a bandwidth occupied by a single channel of the signal.
Preferably, the downstream decimation module is configured to restore data integrity of a single channel of the signal.
Preferably, the filtering module after the uplink interpolation and the filtering module before the downlink extraction can reduce frequency interference outside the channel, and reduce the influence of noise outside the channel on the signal inside the channel as much as possible on the premise of ensuring the integrity of the signal inside the channel.
Preferably, the uplink DUC and the downlink DDC perform spectrum shifting and uniformly distribute the bandwidth of the backhaul system to each channel.
Preferably, the signal input of the digital front end is E-band.
The invention discloses a multichannel DFE digital communication device based on the multichannel DFE digital communication system.
The invention discloses a 5G signal return system based on the multichannel DFE digital communication system.
The invention discloses a 5G signal return system which comprises an optical fiber return system and a microwave return system, wherein the microwave return system is based on the multichannel DFE digital communication system.
The invention has the beneficial effects that:
1. the invention provides a brand new design idea for the design and development of the return system and is suitable for an imagination space of 5G.
2. The invention proves that the multichannel DFE digital communication return system can be realized, and the single-channel DFE digital communication technology can be improved.
3. The invention can effectively reduce intersymbol interference of the system and simultaneously improve the bandwidth utilization rate of the backhaul system.
4. The invention also indicates the direction for the design and implementation of the 5G high-speed return system, and provides a theoretical basis for implementing the 5G high-speed return system based on the large-scale integrated circuit.
Drawings
Fig. 1 is a schematic structural diagram of a 5G carrying net in the background art.
FIG. 2 is a schematic diagram of the present invention, wherein FIG. (a) is an upstream path and FIG. (b) is a downstream path;
FIG. 3 is a schematic diagram of uplink and downlink band transmissions;
FIG. 4 is a schematic diagram of E-Band;
fig. 5 is a schematic diagram of a multi-channel DFE digital communication system according to an embodiment, wherein (a) is an uplink path in the first embodiment, and (b) is a downlink path in the first embodiment.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 2-3, the present invention discloses a multichannel DFE digital communication system and a 5G signal backhaul system, including a digital front end including an uplink path and a downlink path.
The uplink path comprises a plurality of uplink channels, and each uplink channel comprises an uplink Nyquist filtering module, an uplink interpolation module, an uplink post-interpolation filtering module, an uplink DUC and an uplink digital conversion module which are sequentially arranged.
The downlink channel comprises a plurality of downlink channels, and each downlink channel comprises a downlink Nyquist filter module, a downlink extraction module, a filter module before downlink extraction, a downlink DDC and a downlink digital conversion module which are arranged in sequence.
The uplink Nyquist filtering module and the downlink Nyquist filtering module are both used for adjusting the code pattern of the system, so that the system can integrally meet the Nyquist theorem to reduce the intersymbol interference of the system.
The uplink interpolation module is used for reducing the bandwidth occupied by the single channel of the signal. And the downlink extraction module is used for recovering the data integrity of the signal single channel. The filtering module after the uplink interpolation and the filtering module before the downlink extraction can reduce frequency interference outside the wave channel, and reduce the influence of noise outside the wave channel on signals in the wave channel as much as possible on the premise of ensuring the integrity of the signals in the wave channel. The uplink DUC and the downlink DDC finish spectrum movement and uniformly distribute the bandwidth of the return system to each wave channel, and simultaneously, the bandwidth resources of the return system can be efficiently utilized. The up-down row digital conversion ensures that the DFE is in seamless butt joint with the AD/DA, so that the resources are optimal and the efficiency is highest.
The signal input of the digital front end is E-band. The E frequency band refers to a microwave frequency band with the frequency near 80GHz, the actual distribution frequency band is two symmetrical segments of 71-76GHz and 81-86GHz, and the available total bandwidth reaches 10 GHz. Compared with the traditional 3.5-112M channel bandwidth, the E frequency band can use the astonishing bandwidth of 1000MHz to 2000MHz, and the return capacity can reach more than 20Gbps after technologies such as a high-order modulation mode, multi-band polymerization and the like are adopted. In the future, the microwave communication technology will extend from the E-band to the W-band (92-115GHz) and the D-band (130-175GHz), and can realize the high demand of 100 Gbps.
The invention also discloses a multichannel DFE digital communication device based on the multichannel DFE digital communication system.
The invention discloses a 5G signal return system based on the multichannel DFE digital communication system.
The invention discloses a 5G signal return system which comprises an optical fiber return system and a microwave return system, wherein the microwave return system is based on the multichannel DFE digital communication system, the microwave return system is combined with the microwave technology through 5G, and the microwave return system and the optical fiber return system are used in a mixed mode, so that the development of an information network is facilitated.
Example one
The 10Gps data is received from an optical network and divided into two paths, the rate of each path is 5Gbps, the data is modulated by 64QAM, the symbol rate of each path is 834M, the signal frequency spectrum of each path is reduced to 417M through 2-time interpolation, the frequency spectrum interval is broadened to 418M, the channel width is 83.6M, the channel interval is 100M, the frequency spectrum is shifted through a DUC, 5 channels are used for transmission, and 2 500M DAs are sent to an antenna to be sent out after aggregation. Signals received by an antenna are converted into digital signals through 2 AD (analog to digital) of 500M, the digital signals are divided into 5 channels after deaggregation, the channel interval is 100M, the signals are moved to the vicinity of 0-100M frequency through DDC (direct digital control), the symbol rate of each channel is extracted through 2 to be converted into 834M, the two channels of MAC (media access control) processing are combined through 64EQAM demodulation and the data rate of each channel is 5Gbps, and the combined signals are sent out from a 10Gps optical network.
The invention has the following beneficial effects:
1. the invention provides a brand new design idea for the design and development of the return system and is suitable for an imagination space of 5G.
2. The invention proves that the multichannel DFE digital communication return system can be realized, and the single-channel DFE digital communication technology can be improved.
3. The invention can effectively reduce intersymbol interference of the system and simultaneously improve the bandwidth utilization rate of the backhaul system.
4. The invention also indicates the direction for the design and implementation of the 5G high-speed return system, and provides a theoretical basis for implementing the 5G high-speed return system based on the large-scale integrated circuit.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A multi-channel DFE digital communication system comprising a digital front end including an upstream path and a downstream path;
the uplink path comprises a plurality of uplink channels, and each uplink channel comprises an uplink Nyquist filtering module, an uplink interpolation module, an uplink post-interpolation filtering module, an uplink DUC and an uplink digital conversion module which are arranged in sequence;
the downlink channel comprises a plurality of downlink channels, and each downlink channel comprises a downlink Nyquist filter module, a downlink extraction module, a filter module before downlink extraction, a downlink DDC and a downlink digital conversion module which are arranged in sequence.
2. The multi-channel DFE digital communication system as recited in claim 1, wherein the upstream nyquist filter module and the downstream nyquist filter module are used to adjust the code pattern of the system so that the nyquist theorem is satisfied for the system as a whole to reduce intersymbol interference of the system.
3. A multichannel DFE digital communication system as recited in claim 1, wherein the upstream interpolation module is configured to reduce the bandwidth occupied by a single channel of the signal.
4. The multichannel DFE digital communication system as recited in claim 1, wherein the downstream decimation module is configured to restore data integrity of a single channel of the signal.
5. The multichannel DFE digital communication system as recited in claim 1, wherein the post-interpolation filtering module upstream and the pre-decimation filtering module downstream reduce out-of-channel frequency interference and minimize the effect of out-of-channel noise on the in-channel signal while ensuring the in-channel signal is complete.
6. A multichannel DFE digital communication system as recited in claim 1, wherein the upstream DUC and downstream DDC perform spectrum shifting and evenly distribute the bandwidth of the backhaul system to each channel.
7. A multichannel DFE digital communication system as recited in claim 1, wherein the signal input to the digital front end is E-band.
8. A multichannel DFE digital communication apparatus, characterized in that the multichannel DFE digital communication system is based on any one of claims 1-7.
9. A 5G signal backhaul system, characterized by a multichannel DFE digital communication system according to any one of claims 1 to 7.
10. A 5G signal backhaul system comprising an optical fiber backhaul system and a microwave backhaul system, wherein the microwave backhaul system is based on the multichannel DFE digital communication system of any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010436426.7A CN111641573B (en) | 2020-05-21 | 2020-05-21 | Multichannel DFE digital communication system and 5G signal return system |
| PCT/CN2021/079225 WO2021232888A1 (en) | 2020-05-21 | 2021-03-05 | Multi-channel dfe digital communication system and 5g signal backhaul system |
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| CN202010436426.7A CN111641573B (en) | 2020-05-21 | 2020-05-21 | Multichannel DFE digital communication system and 5G signal return system |
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| CN111641573A CN111641573A (en) | 2020-09-08 |
| CN111641573B true CN111641573B (en) | 2022-08-23 |
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| CN111641573B (en) * | 2020-05-21 | 2022-08-23 | 江苏亨通太赫兹技术有限公司 | Multichannel DFE digital communication system and 5G signal return system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428619A (en) * | 2017-08-16 | 2019-03-05 | 联发科技股份有限公司 | Wireless communications method and its system |
| CN110875747A (en) * | 2018-08-29 | 2020-03-10 | 中国移动通信有限公司研究院 | Transmission method and communication equipment |
| CN111163524A (en) * | 2019-12-27 | 2020-05-15 | 京信通信系统（中国）有限公司 | Interference detection method, device, remote unit, access network equipment and storage medium |
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| SG130060A1 (en) * | 2005-08-23 | 2007-03-20 | Oki Techno Ct Singapore Pte | Improvements in and relating to intermediate frequency receivers |
| AU2007352488B2 (en) * | 2007-04-25 | 2011-05-12 | Telekom Malaysia Berhad | Transceiver front end for software radio systems |
| KR20130075567A (en) * | 2011-12-27 | 2013-07-05 | 한국전자통신연구원 | Digital front end receiving using dc offset compensation |
| CN104135310B (en) * | 2014-08-13 | 2017-11-21 | 中国科学院上海微系统与信息技术研究所 | A kind of filter suitable for E Band wireless transmission systems |
| CN104135294B (en) * | 2014-08-13 | 2016-08-24 | 中国科学院上海微系统与信息技术研究所 | A kind of E Band wireless transmission signal generating apparatus |
| CN111641573B (en) * | 2020-05-21 | 2022-08-23 | 江苏亨通太赫兹技术有限公司 | Multichannel DFE digital communication system and 5G signal return system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428619A (en) * | 2017-08-16 | 2019-03-05 | 联发科技股份有限公司 | Wireless communications method and its system |
| CN110875747A (en) * | 2018-08-29 | 2020-03-10 | 中国移动通信有限公司研究院 | Transmission method and communication equipment |
| CN111163524A (en) * | 2019-12-27 | 2020-05-15 | 京信通信系统（中国）有限公司 | Interference detection method, device, remote unit, access network equipment and storage medium |
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| CN111641573A (en) | 2020-09-08 |
| WO2021232888A1 (en) | 2021-11-25 |
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