A low-complexity dynamic non-uniform channelized user separation method

Abstract

The invention discloses a low-complexity dynamic non-uniform channelization user separation method, comprising the following steps: obtaining signal separation configuration parameters, including the number of sub-bands and the number of users of each sub-band; according to the signal separation configuration parameters, Calculate the subsequent shifting frequency points, extraction multiples, and enable signals; according to the shifting frequency points, use the digital mixing module to perform frequency shifting operations on the corresponding users in the signal collected by the ADC; use the CIC filter module Irrelevant signals will be filtered out, and corresponding signal extractions will be performed according to the decimation multiples; the extracted signals will be processed using the compensation filter module to obtain passband compensation and filter the signals more accurately. The present invention combines the characteristics of general non-uniform channel separation and extraction to realize the signal channelization user separation task, and has the advantages of low complexity, and the back-end filter can be reused; the number of users can be configured, and non-uniform channelization users can be achieved separate.

Description

technical field [0001] The invention relates to the field of software radio principles and applications, in particular to a low-complexity method for realizing user separation of dynamic non-uniform channelization. Background technique [0002] Satellites are widely used in the fields of communication, reconnaissance, meteorology, navigation, positioning and ground-to-ground observation. As the carrier of various applications, satellite signals need to be channel-separated between the satellite and the ground. Digital channelization separation is the core component of satellite signal receivers. It has been widely concerned by experts and scholars at home and abroad for many years. Since the 1980s, foreign scholars have begun related research on digital receivers. Then cutting-edge technical ideas such as software radio gradually appeared. There are some companies abroad that specialize in the research of digital channelization separation and have launched modular special ...

AI Technical Summary

Problems solved by technology

[0003] When there are multiple sub-stations in the satellite signal, the digital receiver based on STFT (short time fourier transformation), polyphase structure and analysis filter bank plus synthesis filter bank has a shortcoming in these three structures, that is, An appropriate sampling rate is required for channel separation, and the sub-stations need to be uniform.

There is also a more traditional frequency mixing plus multi-stage filter, but under multi-channel conditions, its complexity is very high, and it is not suitable for multi-channel separation

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