A method and apparatus whereby RF (radio frequency) interference in a
Bluetooth wireless communications link is suppressed using an enhancement
to the Bluetooth protocol which operates to eliminate noise that is
induced on the RF path by external electronic interference. The sampling
rate at a Bluetooth transmitter is doubled, and samples are transmitted
alternately with and without audio data (e.g., the microphone input data
for a Bluetooth headset in transmit mode, or the speaker output data for
a Bluetooth mobile phone in transmit mode) included therein. At the
Bluetooth receiver, received samples which have been transmitted without
audio data are subtracted from (i.e., inverted and digitally added to)
corresponding ones of the received samples which have been transmitted
with audio data, and the receiver then advantageously uses (only) the
(modified) samples resultant therefrom, thereby removing the interference
from the signal without reducing the effective sampling rate.