Multi-channel large dynamic signal sampling method

Abstract

The invention provides a multi-channel large dynamic signal sampling method and aims at providing a large dynamic signal sampling method capable of reducing the processing steps volume and weight of an analog circuit. The method is realized by the technical scheme through the following steps: firstly, filters, automatic gain control (AGC) amplifiers and high-speed analog-to-digital converters (AD)are sequentially connected in series, (1-n) series circuits containing the filters, the AGC amplifiers and the high-speed ADs are set into parallel connection between a programmable device FPGA and apower divider, and then a multi-channel large dynamic signal sampling circuit is formed by connecting the power divider to an AGC amplifier in series; the power divider divides a received signal inton paths to output, and the n paths of signals are separately sent into n filters which are connected in parallel to separate the signals, the n AGC amplifiers amplify the received signals according to the received power of each signal, the high-speed AD converters carry out band-pass sampling and baseband modulation, and the FPGA carries out down-conversion and baseband filtering on each signal and outputs a baseband-modulated digital signal.

Description

technical field [0001] The invention relates to a multi-channel large dynamic signal sampling method capable of simultaneously processing more than 8 channels, a single signal dynamic variation range greater than 80dB, and a power difference of more than 80dB between different channel signals. Background technique [0002] In the process of digital signal processing, sampling, as an important step, will directly affect the result of subsequent digital signal processing. High-precision sampling and real-time reconstruction of signals, as important factors affecting the performance of almost all digital signal processing methods, have attracted more and more people's attention, and have gradually become one of the research hotspots. With the expansion of the application range of digital signal processing technology, the frequency bandwidth range of the signal to be processed is also increasing. As the bandwidth of the analog signal being sampled increases, maintaining high pr...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of complex processing structure, large equipment size and high weight when receiving signals with multiple bandwidths, frequency bands and powers that exist at the same time in the existing complex electronic system. A highly integrated multi-channel large dynamic signal sampling method that reduces analog circuit processing links and volume weight can be reduced by more than 60%, to solve the complex system structure caused by the large number of signals that need to be processed in complex electronic systems such as avionics equipment, Difficult to reduce volume and weight

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