Random noise radar target detection device

A Target Detection Device (TDD), sometimes called a fuze, for determining the distance to an object and the object's velocity, the TDD being capable of defeating a digital radio frequency memory (DRFM) jammer or similar device from causing the TDD to prefunction, thus producing mission failure for the system employing the TDD, the Target Detection Device comprising:

• a source of random noise for modulating a radio frequency (RF) carrier of a transmitter for transmitting a random, electromagnetic signal in the direction of the object, the object reflecting back at least a portion of the electromagnetic signal;
• an antenna and receiver for receiving and amplifying the random, electromagnetic signal returned from the object, the returned signal being a delayed replica of the transmitted signal;
• a correlation processor for correlating the random noise modulation on the transmitted electromagnetic signal with the random noise modulation on the returned electromagnetic signal, the correlation processor generating an output;
• and
• a signal processor for post-processing the output from the correlation processor and determining the distance to the object, the relative velocity between the object and the TDD, the signal processor generating control commands to defeat the DRFM.