a multicarrier transceiver operable to receive, during user data transmission or reception, a message that includes {HEAD ~ the channel measurement information} and to demodulate {TAIL ~ bits} in the message using Quadrature Amplitude Modulation , 
to demodulate
a multicarrier transceiver operable to receive , during user data transmission or reception , a message that includes { HEAD ~ the channel measurement information } and to demodulate { TAIL ~ bits } in the message using Quadrature Amplitude Modulation ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH