A method and digital receiver for multiple sparse bandwidth signal processing

Abstract

The invention discloses a method and digital receiver for processing a plurality of sparse bandwidth signals. According to features of sparse bandwidth signals outputted by an antenna sub system, frequency conversion is carried out on all signals; splicing is carried out after protection band installation to obtain operation bandwidths; sampling bandwidths are obtained; according to the actual capability of an AD device, center frequencies of the sampling bandwidths are determined; a dot frequency needed for frequency conversion on all sparse bandwidth signals is obtained based on a formula; and frequency conversion, filtering, and amplification are successively carried out on all sparse bandwidth signals by the dot frequency and then signal combination is carried out to obtain one path of sampling signals with bandwidths being B, and then AD sampling and digital signal processing are carried out on the sampling signals. According to the technical scheme, multiple sparse bandwidth signals can be covered instantaneously and all-weather control can be realized. Meanwhile, receiving and processing of a plurality of sparse bandwidth signals can be realized. The method and the digital receiver are suitable for radio communication and intelligence and have beneficial effect that the maximum electromagnetic spectrum usage, monitoring and control can be realized by using the minimum device quantity.

Description

technical field [0001] The invention relates to the field of radio communication, in particular to a method for processing multiple sparse bandwidth signals and a digital receiver. Background technique [0002] With the development of information warfare, the two sides in the war have become the core of electronic warfare for the right to use and control the electromagnetic spectrum. How to use the minimum amount of equipment to achieve the maximum use, monitoring, and control of the electromagnetic spectrum has become the key to winning electronic warfare. [0003] There are two ways to process multiple sparse bandwidth signals in the prior art: [0004] One is to use an intermediate frequency digital receiver to down-convert the input signal to an intermediate frequency, use the band-pass sampling theorem to realize the acquisition of the intermediate frequency signal, and then perform digital signal processing. However, in special cases, when multiple bandwidth signals ...

AI Technical Summary

Problems solved by technology

However, in special cases, when multiple bandwidth signals are sparsely distributed in a large frequency domain, such as hundreds of megahertz or even several gigahertz, even if the local oscillator of the IF digital receiver has a strong tuning ability, it is still Instantaneous coverage and all-day time control of multiple bandwidth signals cannot be realized, only time-sharing coverage can be realized

[0005] The other is to use multiple sets of channelized digital receivers without tuning capabilities to monitor signals of different bandwidths around the clock. However, the disadvantage of this technical solution is that it leads to a sharp increase in the amount of equipment

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