A Nonlinear Device to Suppress Strong Interfering Signals with Arbitrary Angle Modulation in Spread-Spectrum Receivers

A device which can be used to suppress strong constantenvelope interfering signals at the input of spread-spectrum receivers is described and analyzed. Unlike similar circuits known from literature, this device is not restricted to the suppression of narrow-band jamming signals; it can also cope with broad-band interfering signals bearing any kind of angle modulation. The theoretical results are confirmed by measurements.