Design of high-resolution radar waveforms for multi-radar and dense target environments

This study addresses the waveform design problem of high-resolution radar, especially for dense target environments when the detection of small targets in the neighbourhood of large target is more important. Such a practical application demands an ambiguity function with a sharp central spike and large clear area around it, which is free from the sidelobes. This study investigates the sidelobe-pushing property of the Linear Congruence (LC) Codes that can produce the desired sidelobe-free area around the mainlobe. Minimum Sequence Length Criteria for achieving the desired sidelobe-free area are also described. In order to achieve the sharp central mainlobe in the delay-Doppler plane for resolving closely spaced targets, modifications are suggested to the LC codes and such modified sequences are called ´Modified Linear Congruence Codes´. The designed codes are highly suitable in dense target scenarios as well as in multi-radar environments.