Pulsed radars that are not required to be Doppler sensing systems have traditionally employed low pulse repetition frequency (PRF) waveforms. A low PRF is defined as one which is sufficiently low so as to avoid range ambiguities. To avoid range ambiguity, the maximum detection range of the radar for all target and clutter returns is required not to exceed R_mu. This ensures that all returns are first-trace echoes, that is, that they fall within the first receiving period, and their range may be determined from a simple range delay timing method. Low PRF waveforms are typically low duty ratio waveforms and employ a large number of range cells matched to the range resolution of the radar distributed throughout the receiving period. Target range is therefore readily available from low PRF systems.

Chapter Contents:

• 9.1 Introduction
• 9.2 PRF Selection for Unambiguous Doppler/Velocity
• 9.3 Timing Aspects of High PRF
• 9.4 High PRF Radar Response to Clutter
• 9.5 Surface-Based High PRF Radars
• 9.6 Summary of the Characteristics of High PRF

Inspec keywords: radar detection; object detection; radar resolution; delays; radar clutter; Doppler radar; radar receivers

Other keywords: high pulse repetition frequency pulse Doppler radar; radar detection; target detection; delay timing method; MEMS packaging; first-trace echo; radar receiver; radar resolution; low duty ratio waveform; PRF waveform; Doppler sensing system; clutter

Subjects: Radar equipment, systems and applications; Signal detection