Interference detection apparatus and method

摘要

Techniques for detecting jammers in a received signal are described. A jammer detector includes a jammer filter for attenuating transmit signals leaked into the receive path, a pulse generator for converting the interference signals into discrete-level pulses, and a pulse processor for determining the presence of jammers in the discrete-level pulses. In an exemplary embodiment, the pulse processor is configured to further discriminate among close-in jammers that are close to the desired receive frequency, far-away jammers, and jammers arising from the transmit signals leaked into the receive path. In another exemplary embodiment, hysteresis is provided in the pulse generator to enable the generation of reliable pulses. Further aspects include configuring the jammer detector for operation in a plurality of frequency bands and/or according to a plurality of communications standards.

主权项

1. An apparatus for detecting jammers in a received signal, the apparatus comprising:
a pulse generator, an input signal to the pulse generator coupled to the received the pulse generator comprising at least one comparator for generating an output signal comprising a set of discrete-amplitude pulses based on comparing the input signal to a reference level; and a pulse processor, an input signal to the pulse processor coupled to the output signal of the pulse generator, the pulse processor configured to compute a pulse frequency metric for the pulse generator output signal over a time window, accumulate the pulse frequency metric over a plurality of time windows to generate a first accumulated metric, and generate a first jammer detection signal in response to a determination that the first accumulated metric exceeds a first threshold.