Nonlinear suppression of range ambiguities in pulse-diverse radar

Coherent pulse train processing gives improved Doppler resolution. compared to single pulse processing, but introduces range and Doppler ambiguities. Diversely coded pulse trains produce a weighted composite ambiguity functio n at the origin and cross-ambiguity terms at multiples of the pulse repetit ion interval. An idealised nonlinear suppression operator is introduced to suppress these terms, effectively reducing the total volume under the ambig uity surface. Nonlinear suppression is introduced to approximate ideal supp ression operation and illustrated by example.