Spectrum extension edgeless gating for reduced time domain gating edge errors

Signal processing equipment for processing a finite frequency signal to suppress edge effects arising from a time gating process within the equipment, the equipment comprising:

• processing circuitry configured to:
• pad the finite frequency signal with samples placed outside a frequency range of the finite frequency signal to produce an extended signal, the samples being derived from an extrapolation process;
• and
• apply a time gating process to the extended signal to exclude signals occurring outside a time interval and to produce a time gated signal with suppressed edge effects.

A method for improved processing of a finite frequency signal by signal processing equipment to suppress edge effects arising from a time gating process, the method comprising:

• receiving a finite frequency signal having a frequency band extending from a lower frequency to an upper frequency;
• performing an extrapolation process on the finite frequency signal to produce an extended signal having samples in a region outside the frequency band of the finite frequency signal;
• defining at least one time gate to exclude signals contained in the extended signal that occur outside a time interval;
• and
• applying the at least one time gate to the extended signal to produce a time gated signal.