Potential interference is reduced in an impulse radio. A signal including
an impulse signal and potential interference is received by the impulse radio.
The impulse signal includes a sequence of impulses. The sequence of impulses of
the received signal is sampled at a sequence of data sample times to produce a
sequence of data samples. The received signal is also sampled at a plurality of
time offsets from each of the data sample times to produce a plurality of nulling
samples corresponding to each of the data samples. A separate sequence of nulling
samples for each of the time offsets is thereby produced. Each of the data samples
is then separately combined with a corresponding nulling sample from each of the
separate sequences of nulling samples to produce a separate sequence of adjusted
samples corresponding to each of the time offsets. A separate quality metric, representative
of a signal-to-interference level, is then determined for each of the separate
sequences of adjusted samples. A preferred sequence of samples is selected for
further signal processing based on the determined quality metrics. Alternatively
or additionally, one of the plurality of time offsets is selected as the preferred
time offset based on the determined quality metrics.
