a component configured to provide a local oscillator signal using {HEAD ~ a sample} of {TAIL ~ a transmitter signal}; and 
of
a component configured to provide a local oscillator signal using { HEAD ~ a sample } of { TAIL ~ a transmitter signal } ; and
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH