Electronic reconnaissance broadband digital receipt signal processing method based on under sampling

An electronic reconnaissance and digital receiving technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as difficult work and limited processing bandwidth, and achieve the effect of increasing processing bandwidth, solving data "bottlenecks, and small amount of calculation."
CN101793952BInactive Publication Date: 2012-09-05NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2012-09-05
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an electronic reconnaissance broadband digital receipt signal processing method based on under sampling. The method of the invention includes that: system bandwidth of a receiver is determined, and two sampling ADs are selected; according to Winograd algorithm, FFT operation is respectively carried out on the two AD acquisition signals, so as to obtain a first frequency spectrum of a first sampling AD and a second frequency spectrum of a second sampling AD; modulus of the two frequency spectrums are obtained; maximum of modulus of the two frequency spectrums and position thereof in spectral line as well as sub-maximum of modulus and position thereof in spectral line are searched, and finally frequency value of primary sinusoid component is obtained. The invention can cause the processing bandwidth of the receiver to breakthrough half of sampling frequency of AD device without using complex signal and improves the processing bandwidth.
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Description

technical field

[0001] The invention relates to a digital processing method for radar signals in the field of electronic reconnaissance broadband digital reception. Background technique

[0002] Wideband digital receiver technology is a hot topic in the field of electronic reconnaissance. With the increase of processing bandwidth, the requirements for AD sampling rate and subsequent digital signal processing capability also increase, which brings difficulties in engineering implementation.

[0003] At present, the processing objects of electronic reconnaissance broadband digital receivers are usually complex signals (such as digital channelized receivers, see literature [1-4]), if the sampled signal is a complex signal with I and Q paths orthogonal to each other, then the receiving The system processing bandwidth of the computer is equal to the sampling rate of the two ADs. However, the received radar signal is a single-channel real signal. When the system processing bandwi...

Claims

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