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