Single-chip microcomputer-based multi-carrier interference signal generator

Abstract

The invention discloses a multi-carrier interference signal generator based on a single-chip microcomputer, which includes a multi-subcarrier generation circuit, an adder circuit, an up-conversion circuit, a radio frequency power amplifier circuit, and a VCO circuit connected to the up-conversion circuit in sequence. It includes a power supply module for supplying power to each of the above circuit modules. The invention utilizes a program to control a high-speed 32-bit single-chip microcomputer, a plurality of I/O ports output square waves of different frequencies, and obtains a fundamental frequency component after filtering each square wave, realizes the function of an adder through an operational amplifier, and synthesizes each fundamental frequency Enter the mixer, mix with the VCO signal, and get the final multi-carrier interference signal after the carrier frequency filter. This method can realize the sub-carrier frequency of ±(0.01MHz~50MHz). The circuit is novel in structure, simple in debugging, high in thermal stability, easy to implement, and capable of outputting carrier signals of different frequencies and sub-carrier signals of different frequencies and different frequency intervals.

Description

technical field [0001] The invention relates to the communication field, in particular to a multi-carrier interference signal generator based on a single-chip microcomputer, which is used to generate a radio frequency signal with a sub-carrier frequency of ± (0.01Hz-50MHz) and an optional carrier frequency. Background technique [0002] In electronic communication technology, the signal generator is one of the most basic components. Waveform generation and frequency control are the most basic requirements and the basis of communication technology. Therefore, it is particularly important to design the generation and control of waveforms. [0003] Traditional interference signal generator modules generally have two implementation methods, one is to use 555 circuit or single-chip microcomputer to generate triangular wave or sawtooth wave to control VCO, and form a frequency sweep signal within a certain frequency range, this method is not fast enough Fast, and cannot effectivel...

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Problems solved by technology

[0003] Traditional interference signal generator modules generally have two implementation methods, one is to use 555 circuit or single-chip microcomputer to generate triangular wave or sawtooth wave to control VCO, and form a frequency sweep signal within a certain frequency range, this method is not fast enough Fast, and cannot effectively cover multiple sub-carriers at the same time; one is to use a single-chip microcomputer or FPGA to control the integrated DDS chip to generate and output sub-carrier signals. This method has high material costs, complicated software and hardware debugging, and large overall size.

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