Multi-channel DFE digital communication system and 5G signal return system

Abstract

The invention discloses a multichannel DFE digital communication system and a 5G signal return system, and the system comprises a digital front end which comprises an uplink path and a downlink path;wherein 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; wherein the downlink path comprises a plurality of downlink channels, and each downlink channel comprises a downlink Nyquist filtering module, a downlink extraction module, a downlink extraction pre-filtering module, a downlink DDC and a downlink digital conversion module which are arranged in sequence. The multi-channel DFE digital communication can be realized, the intersymbol interference of the system is reduced, and the bandwidth utilization rate of the backhaul system is improved.

Description

technical field [0001] The invention relates to the field of 5G high-speed communication, in particular to a multi-channel DFE digital communication system and a 5G signal return system. Background technique [0002] For the 5G bearer network, there are fronthaul, midhaul and backhaul. Such as figure 1 As shown, the 5G base station is restructured into three parts: AAU, DU, and CU. According to specific scenarios and requirements, DU and CU can be deployed together or separately. When deployed separately, there will be more so-called intermediate transmission. up. The data transmission between AAU and DU is fronthaul, between DU and CU is midhaul, and the part of CU accessing the core network is backhaul. [0003] Backhaul technology usually adopts wireless backhaul and optical fiber backhaul. Most of China uses optical fiber backhaul, and wireless backhaul is only used in a few emergency scenarios. The reason is that the reliability of optical fiber backhaul is stronge...

AI Technical Summary

Problems solved by technology

However, the traditional microwave frequency band (6-42GHz) has limited spectrum resources and small channel spacing (the current maximum channel spacing in China is 28MHz), which makes it difficult to meet the large bandwidth requirements of LTE base stations for bearer networks.

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