Multi-carrier digital receiver based on digital intermediate frequency and multi-carrier digital receive method

Abstract

The invention discloses a multi-carrier digital receiver based on digital medium frequency, which comprises a radio frequency receiving subsystem, an A / D converter, a digital baseband signal processing subsystem, an automatic frequency control subsystem, and a multi-carrier digital down-conversion subsystem; wherein, the output terminal of the radio frequency receiving subsystem is connected with the input terminal of the digital baseband signal processing subsystem sequentially by the A / D converter and the multi-carrier digital down-conversion subsystem, the input terminal of the automatic frequency control subsystem is connected with the output terminal of the digital baseband signal processing subsystem, and the output terminal of the automatic frequency control subsystem is connected with the input terminal of the radio frequency receiving subsystem. The invention establishes the multi-carrier digital down-conversion subsystem by adopting the digital medium frequency technology and utilizing the multi-carrier signal processing method, thus avoiding the limitation of the traditional digital down-conversion subsystem and realizing the multi-carrier digital receiver system.

Description

technical field [0001] The invention relates to a digital receiver system, in particular to a digital intermediate frequency-based multi-carrier digital receiver and a multi-carrier digital receiving method. Background technique [0002] Traditional digital receiver systems based on digital IF technology (such as figure 1 shown) generally includes the radio frequency receiving subsystem, the digital intermediate frequency processing subsystem, the baseband signal processing subsystem and the background processing subsystem, etc. The radio frequency receiving subsystem realizes the conversion and processing of signals from RF to IF; the digital intermediate frequency processing subsystem realizes data processing from analog IF to digital baseband I and Q, and the baseband digital signal processing subsystem completes synchronization and demodulation processing, and background processing realizes communication Interface control, interface level conversion and interconnection ...

AI Technical Summary

Problems solved by technology

With the development of mobile communication, the number of mobile communication users has increased sharply, operators have to expand the capacity of mobile communication systems of various standards to meet the communication needs of users, resulting in increased operating costs

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