Programmable LFM signal processor

Details Programmable LFM signal processor Programmable LFM signal processor

1983-07-11

1986-05-27

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343 5FT, G01S 1328

Patent

active

045918570

ABSTRACT:
The linear frequency modulation (LFM) signal processor may be programmed to be a matched filter for any pulse compression (PC) ratio less than or equal to the square of the number of bandpass filters. The processor is implemented by using a fast Fourier transform (FFT) for the filter bank. The implementation shown assumes digital processing at baseband using in-phase and quadrature (I and Q) channels and an FFT for the filter bank. The I and Q channels are fed through a sidelobe filter, a short input tapped delay line, and a set of M complex multipliers to the FFT. The FFT outputs are connected to a long tapped delay line through a second set of complex multipliers whose outputs are summed in the long tapped delay line summer.

REFERENCES:
patent: 4373190 (1983-02-01), Lewis et al.
patent: 4379295 (1983-04-01), Lewis et al.
patent: 4509051 (1985-04-01), Lewis
patent: 4513289 (1985-04-01), Kretschmer

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