spreading {HEAD ~ means} for {TAIL ~ spread spectrum} processing the message data, synchronized with the generic chip code signal, as spread spectrum processed message data 
spreading { HEAD ~ means } for { TAIL ~ spread spectrum } processing the message data , synchronized with the generic chip code signal , as spread spectrum processed message data
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH