Reconfigurable broadband digital channelized exchange method and system

Abstract

The invention discloses a reconfigurable broadband digital channelized exchange method and system and relates to the communication field. The reconfigurable broadband digital channelized exchange method includes that a finite impulse response (FIR) equiripple low-pass filter group with the bandwidth to be the preset times of the bandwidth of a basic sub channel is designed; the frequency domain parameter of each low-pass filter in the low-pass filter group is extracted and trimmed; base band frequency domain data of each business sub signal are separated from a broadband uplink channel according to the frequency domain parameters; the base band frequency domain data of the business sub signals obtained through separation are subjected to exchange processing to obtain base band frequency domain data of each business signal in a broadband downlink channel; the base band frequency domain data of the business signals in the broadband downlink channel are comprehensively processed to obtain time domain complex base band data of the broadband downlink channel. The reconfigurable broadband digital channelized exchange method and system remarkably improve flexibility of a digital channelized device.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a reconfigurable broadband digital channelized switching method and system. Background technique [0002] The satellite communication application environment is becoming more and more complex, and related technologies and communication requirements are developing rapidly. The high cost of geostationary satellites and the much higher difficulty of on-orbit technology update than ground systems require on-orbit geosynchronous satellites to have extensive adaptability and flexibility. Specifically, the requirements are: the on-board payload is not sensitive to the specific frame structure, channel codec method, and signal modulation method used in the transmission service, and has wide adaptability; the on-board payload has the on-board switching function. Digital channelization technology is just in line with this development situation. [0003] Digital channelizat...

AI Technical Summary

Problems solved by technology

The existing commonly used digital channelization methods are more or less limited and less flexible: the analytical signal method requires that all sub-channels to be processed have the same bandwidth; the digital down-conversion method requires a small ~8); the tree method requires that there is a relationship N=2 between the subchannel multiplexing number N and the series L using filtering and extraction structures L ; The multiphase discrete DFT method usually requires that all subchannels have the same bandwidth, and the guard bandwidth between subchannels is the same; the discrete filter bank method requires a very large amount of calculation and storage when the number of multiplexed subchannels is large

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