Sidelobe suppression for phase-coded pulse by mainlobe windowing

Abstract

Mismatched filter is an important technique to suppress the sidelobes of phase-coded pulses. Here, the authors propose a mainlobe windowing procedure, by which a much lower sidelobe level can be obtained at a slightly signal-to-noise ratio loss. Based on this idea, they present two mismatched filter design procedures, namely an integrated sidelobe level (ISL) optimal filter and a peak sidelobe level (PSL) optimal filter. The ISL optimal filter can be obtained by a formula in closed form and the PSL optimal filter can be obtained by optimisation procedures. Simulation results are presented to verify the theory.

Keywords

• filtering theory
• optimisation
• radar signal processing
• phase coding
• pulse compression
• sidelobe suppression
• phase-coded pulse
• important technique
• sidelobes
• mainlobe windowing procedure
• lower sidelobe level
• slightly signal-to-noise ratio loss
• mismatched filter design procedures
• integrated sidelobe level optimal filter
• peak sidelobe level optimal filter
• isl optimal filter
• psl optimal filter
• optimisation procedures