Single channel digital frequency selection system with input and output on same frequency and implementing method thereof

Abstract

The invention discloses a single-channel digital frequency-selecting system with the same input and output frequency, comprising an ADC subsystem, a single-channel digital intermediate-frequency processing subsystem, an MCU control subsystem and a D / A converter, wherein, the single-channel digital intermediate-frequency processing subsystem is connected respectively with the ADC subsystem, the D / A converter and the MCU control subsystem; the MCU control subsystem is also connected respectively with the ADC subsystem and the D / A converter. According to that the input frequency and the output frequency of the digital frequency-selecting system are equal, a structure-simplified single-channel digital frequency-selecting system is provided in design with the symmetry of DDC and DUC systems. With the advantages of simple structure, high resource reuse rate, strong feasibility and promising application prospect, the invention can be applied to bases, base subsystems, digital radio remote systems, digital repeater stations and carrier scheduling systems etc., of communication systems of GSM, CDMA, DCS, JDC, TD-SCDMA, WCDMA, CDMA2000, etc.

Description

Technical field [0001] The invention relates to the technical field of wireless communication, in particular to a single-channel digital frequency selection system with input and output at the same frequency and an implementation method thereof. Background technique [0002] In the context of multiple standards, multiple systems, and lack of radio spectrum resources in wireless communication systems, the interoperability of wireless communication systems has become increasingly important, and traditional wireless communication systems have been unable to meet the needs of communication development. Software radio technology provides a feasible method to solve the above problems and greatly promotes the rapid development of mobile communication technology. [0003] Software radio technology is based on digital signal processing theory and adopts software radio technology, which has the following advantages: [0004] (1) The digital local oscillator signal and the digital I and Q sign...

AI Technical Summary

Problems solved by technology

[0012] From the analysis of the above signal processing flow, it can be seen that the traditional single-channel digital frequency selection system is composed of multiple independent modules, which requires more resources and complex implementation strategies, especially when applied to digital frequency selection systems with the same input and output frequencies When the system is implemented, due to the symmetry of the frequency, the structure is more complicated, the resource reuse rate is low, the cost is high, and the feasibility is poor.

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