In some embodiments the tag backscatters {HEAD ~ a combination} of its tag response and {TAIL ~ one or more other codes} 
of
In some embodiments the tag backscatters { HEAD ~ a combination } of its tag response and { TAIL ~ one or more other codes }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL