An antenna radio frequency front-end device with direction finding and active anti-jamming functions

Abstract

The invention belongs to the technical field of wireless communication and in particular relates to an antenna radio frequency front end device with direction finding and initiative anti-interferencefunctions. The device comprises four transceiving channel circuits, four antennae and one regular tetrahedron frame structure, wherein each antenna is connected with one transceiving channel circuit and is arranged at one vertex position of the regular tetrahedron frame structure. Regular tetrahedron three-dimensional layout at the antenna radio frequency front end can minimize structure size andrear-end signal processing can be combined for accurately learning positions of a useful signal and an interference signal in the space, so as to realize the directional communication and anti-interference aims. The device provided by the invention also can specifically reduce amplitude of the interference signal by applying an arranged radio frequency sum and difference channel, so that linear dynamic range of a receiver and signal-to-noise ratio of a system are increased.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an antenna radio frequency front-end device with functions of direction finding and active anti-jamming. Background technique [0002] As we all know, today's spectrum resources are getting tighter and tighter. Applications such as radio and television, communications, and radar occupy most of the frequency bands within 6GHz, and microwave and millimeter wave spectrum resources with higher frequencies are actively being developed. Therefore, for a specific application, there is potential for more and more radio interference. In order to meet this challenge, in addition to the reasonable planning of spectrum resources by the international community and domestic authorities, various device manufacturers are also working hard to develop analog filters with good suppression performance, small size, and low insertion loss. For example, base stations in publ...

AI Technical Summary

Problems solved by technology

First, the analog filter of the RF front-end cannot filter out the in-band interference. Once the interference signal falls in the band and has a strong amplitude, it will not only reduce the signal-to-noise ratio of the useful signal, but even block the entire receiver, making the back-end unable to demodulate correctly ; Second, with the increasing shortage of spectrum resources, the probability of using the same spectrum in the same space and time is increasing. Traditional technologies believe that interference signals come from any direction, and cannot reduce interference in a targeted manner to ensure communication quality; Although the idea and concept of frequency hopping are relatively advanced, they also face practical problems: on the one hand, the insertion loss of existing frequency hopping filters is relatively large, which is about 2dB-3dB higher than ordinary filters, and the coverage distance is greatly reduced; On the one hand, it is difficult to synchronize between communication systems, especially the synchronization of high-speed frequency hopping

[0005] Although in the new wireless communication system, merchants have proposed and started to apply the MIMO (Multiple-Input Multiple Output, abbreviation: MIMO) or Massive MIMO architecture, that is, two or more antennas are placed in an array, and the distance between the two antennas is about 0.4 λ~0.6λ, use diversity transceiver to offset multipath fading, increase receiving gain and coverage distance, but it is still impossible to know the specific orientation of useful signals and interference signals in all directions to achieve the purpose of active noise reduction

Images