Multi-sampling-channel pulse compressor
Sampling spectrum analyzer
Automatic frequency identifier for radar signals
Continuous repeater target dental device
Multichannel alignment system
Alias tagging time domain to frequency domain signal converter
Method and a circuit for determining the momentary frequency of a signal
Instantaneous frequency measurement (IFM) receiver with only two delay lines
ApplicationNo. 037854 filed on 03/29/1993
US Classes:324/76.22, Real-time spectrum analyzer324/76.21, By Fourier analysis324/76.35, With delay line342/13, RADAR EW (ELECTRONIC WARFARE)342/20, Detection of surveilance702/77Using Fourier method
ExaminersPrimary: Wieder, Kenneth A.
Assistant: Solis, Jose M.
Attorney, Agent or Firm
International ClassG01R 023/16
AbstractThis is an arrangement to find two folding frequencies that fold into one frequency bin, which will save hardware. The input frequency in down converted into I and Q channels. Each channel requires one pair (two) of A/D converters. A total of three pairs of A/D converters are required. All three pairs of A/D converters have the SAME sampling frequency fs. There is a time delay of ͌ before the second pair of A/D converters, and 2͌ before the third pair. At the outputs of the A/D converters FFT units followed by a signal processor are used to find the input frequencies by solving non-linear simultaneous equations.