Abstract:
Special types of transmitted code and decoding signals for different selected range subintervals within the maximum range of interest result in the optimization of range sensitivity for each subinterval.
Abstract:
An apparatus providing integrally combined correlation and transversal equalization functions. A preferred form of the apparatus in a single structure comprises a surface wave acoustical device. Illustrative uses include suppressed sidelobe correlators of radartype signals including phase coded signals.
Abstract:
Special types of transmitted code and decoding signals having serial detection and range bins portions permit a single decoder channel to provide a relatively soft aural signal to any detected target not within a selected range bin and a relatively loud aural signal to any detected target within the selected range bin.
Abstract:
Side lobe residue cancellation is achieved by the use of special types of transmitted code and decoding signals which results in the residues left over from imperfect decoding of undesired targets at uncorrelated ranges modulating a code group frequency, while desired correlated targets maintain their baseband structure. The undesired targets are eliminated by passing the resultant signal through a baseband audio filter. The special types of transmitted and decoding signals also preferably may be chosen to provide greater sensitivity to more distant targets than closer targets.