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Array element level multi-user interference elimination system

A technology for multi-user interference and elimination system, applied in the field of array element-level multi-user interference elimination system, and can solve problems such as interference elimination

Active Publication Date: 2022-01-21
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to solve the problem of interference cancellation in which users are distributed in different beams, and provides an array element level multi-user interference cancellation system. Power signal users are covered by different beams, and there are multiple interference users or communication users under each beam

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  • Array element level multi-user interference elimination system

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Embodiment 1

[0030] This embodiment provides a technical solution: an array element level multi-user interference cancellation system, including the following modules:

[0031] Interference beamforming module: According to the azimuth of the interference signal, the input multi-channel array signal is weighted and processed to perform digital beamforming;

[0032] The interference beam processing module demodulates the synthesized interference beam, then reconstructs and regenerates the high-power interference signal, and reconstructs the high-power array element according to the regenerated high-power interference signal and the beamforming coefficient of the beam where the interference signal is located level interference signal;

[0033] The interference beam processing module includes an acquisition submodule, an interference demodulation submodule, an interference regeneration submodule, and an interference array element signal reconstruction submodule;

[0034] Among them, the captu...

Embodiment 2

[0053] figure 2 It is a block diagram for the implementation of element-level interference cancellation. Assuming that the number of phased array elements is 30, the element-level interference cancellation includes the following steps:

[0054] (1) Interference beamforming: According to the azimuth where the interference signal appears, the input multi-channel array signal is weighted and processed to perform digital beamforming.

[0055] (2) Acquisition: At the receiving end, it is necessary to capture the spreading code, so that the received signal spreading code is phase-aligned with the local spreading code, so that the signal correlation peak can appear, and then the signal is despread;

[0056] (3) Interference demodulation: It consists of three functional parts: carrier and code dynamic cancellation module, despreading integration module, and synchronization loop module. The carrier and code dynamic offset module performs carrier and spread code Doppler compensation o...

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Abstract

The invention discloses an array element level multi-user interference elimination system, and belongs to the technical field of satellite communication. The system comprises an interference beam forming module, an interference beam processing module, a delay module, an array element level interference cancellation module, a signal beam forming module and a signal beam processing module. And the interference beam forming module is used for performing weighting processing on the input multi-channel array signal according to the position where the high-power interference signal appears, and performing digital beam forming. According to the invention, array element level interference elimination can be realized before beam synthesis, and the influence of non-uniform distribution of users among different beams is isolated, so the system can be well applied to a phased array multi-beam scene, and is worthy of popularization and application.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to an array element level multi-user interference elimination system. Background technique [0002] Due to its technical characteristics of electronic scanning, the phased array has the advantage of fast and agile beam pointing, which is much faster than the traditional mechanical reflector antenna beam adjustment time. Therefore, the application of phased array technology in satellite communication networks is becoming more and more popular. Since the users of the satellite network are distributed all over the world, in order to increase the system capacity, multi-beams are generally used to cover different areas. In the specific communication system, spread spectrum communication has the characteristics of concealment because the signal is submerged in the noise, and has become a mainstream communication system. In spread spectrum communication systems, code divi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04K3/00
CPCH04B7/18513H04B7/18519H04K3/22H04K3/25Y02D30/70
Inventor 姚艳军赵宇峰顾何方王烁邹永庆王昕任伟龙章明明黄永华裴恒
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST