Bandpass filter demodulation for FM-CW systems
AssigneeMotorola, Inc.
InventorsGerald J. Moore, Curtis L. Eickerman
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Abstract
A method and device for bandpass filter demodulation for FM-CW systems which includes providing a FM-CW signal to an input of a bandpass demodulator, amplifying the FM-CW signal, timing the bandpass demodulator at an integer multiple of the FM-CW signal frequency, and simultaneously demodulating/filtering the FM-CW signal to produce a signal in baseband containing suppressed carrier-Doppler sideband information from the FM-CW signal. The demodulating/filtering functions are performed in an appropriately biased and clocked switched capacitive filter.
Claims6
A radar system for processing a FM-CW harmonic signal comprising:
- transmitter means comprising a frequency modulation signal input and a transmitter output;
- antenna means comprising an antenna output;
- coupler/detector means comprising a first coupler/detector input coupled to the transmitter output, a second coupler/detector input coupled to the antenna output, and a coupler/detector output;
- bandpass demodulator means comprising a first bandpass demodulator input coupled to the coupler/detector output, a second bandpass demodulator input, and a bandpass demodulator output;
- ratio detector fuzing algorithm means comprising a ratio detector fuzing algorithm input coupled to the bandpass demodulator output, and a ratio detector fuzing algorithm output;
- and
- system timing means comprising a first system timing output coupled to the frequency modulation signal input and a second system timing output coupled to the second bandpass demodulator input.
Dependencies are inferred from the claim text.