×

Adaptive weak signal identification system

  • US 5,422,912 A
  • Filed: 06/23/1994
  • Issued: 06/06/1995
  • Est. Priority Date: 06/23/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. An adaptive weak signal identification system for identifying a weak signal of interest present in a given bandwidth along with a strong interference signal which is at a different frequency, comprising:

  • a. a first Fast Fourier Transform circuit for performing a Fast Fourier Transform on a discrete block of data points of an input data signal;

    b. a filter coefficient generator means, coupled to the output of said Fast Fourier Transform circuit, for identifying the frequency of the strong interference signal, and for generating filter coefficients for a notch filter based upon the frequency of the strong interference signal;

    c. said notch filter, having said generated filter coefficients as an input and further having the input data signal as an input, for performing a notching filtering operation on the input data signal;

    d. a second Fast Fourier Transform circuit, coupled to the output of the notch filter, for performing a Fast Fourier Transform on the output of said notch filter;

    e. means, coupled to the output of the Fast Fourier Transform circuit, for identifying the frequency of the weak signal of interest.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×