Single transmit multi-receiver modulation radar, multi-modulation receiver and method
First Claim
1. A receiver comprising:
- a plurality of modulators, each modulator to modulate signals received through an associated receive-signal path with one of a plurality of differing modulation waveforms having a low-cross correlation product;
combining circuitry to combine the modulated signals from each receive-signal path; and
signal processing circuitry to perform correlations on the modulated combined signals using the modulation waveforms.
1 Assignment
0 Petitions
Accused Products
Abstract
A single transmit multi-receiver modulation radar modulates radar return signals received through an associated receive-signal path with one of a plurality of differing modulation waveforms having low-cross correlation products. Each receive-signal path may be associated with a different receive direction. The differently modulated return signals from each receive-signal path may be combined and correlations may be performed on the combined and differently modulated radar return signals using the modulation waveforms to locate a target. In some embodiments, the trajectory of the target may be extrapolated and the target'"'"'s source location may be determined.
-
Citations
40 Claims
-
1. A receiver comprising:
-
a plurality of modulators, each modulator to modulate signals received through an associated receive-signal path with one of a plurality of differing modulation waveforms having a low-cross correlation product;
combining circuitry to combine the modulated signals from each receive-signal path; and
signal processing circuitry to perform correlations on the modulated combined signals using the modulation waveforms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A radar system comprising:
-
a plurality of modulators, each modulator to modulate radar return signals received through an associated receive-signal path with one of a plurality of differing modulation waveforms;
combining circuitry to combine the differently modulated return signals from each receive-signal path, each receive-signal path being associated with a different direction; and
signal processing circuitry to perform correlations on the combined and differently modulated radar return signals using the modulation waveforms to determine a location of a target. - View Dependent Claims (20, 21, 22, 23, 24)
-
-
25. A method of operating a radar system comprising:
-
modulating radar return signals received through an associated receive-signal path with one of a plurality of differing modulation waveforms having a low cross-correlation product;
combining the differently modulated return signals from each receive-signal path, each receive-signal path being associated with a different direction; and
performing correlations on the combined and differently modulated radar return signals using the modulation waveforms to determine a location of a target. - View Dependent Claims (26, 27, 28, 29, 30)
-
-
31. A passive direction-finding system comprising:
-
a plurality of modulators, each modulator to modulate signals received from a signal source through an associated receive-signal path with one of a plurality of differing modulation waveforms having a low cross-correlation product;
combining circuitry to combine the modulated signals from each receive-signal path, each receive-signal path being associated with a different direction; and
signal processing circuitry to perform correlations on the combined modulated signals using the modulation waveforms to determine a direction to the signal source. - View Dependent Claims (32, 33, 34, 35)
-
-
36. A method of locating a signal source comprising:
-
modulating signals received from a signal source through an associated receive-signal path with one of a plurality of differing modulation waveforms having a low cross-correlation product;
combining circuitry to combine the modulated signals from each receive-signal path, each receive-signal path being associated with a different direction; and
performing correlations on the combined modulated signals using the modulation waveforms to determine a direction to the signal source. - View Dependent Claims (37, 38, 39)
-
-
40. The method of the 38 wherein the modulation waveforms comprise either pseudo-orthogonal waveforms or quadratic-polyphase waveforms.
Specification